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Our 10 years of Lithium Iron Phosphate experience shared within thousands of articles, hundrends of tests and examples.


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16.02.2018
 
Using BMS to analyze the cell performance

BMS settings charge voltage

 

Why is the BMS needed for a LFP battery pack consisting of many cells?

Answer: The Battery Management System (BMS) allows you to monitor the battery pack operation. Since the battery consists of a serial string of many cells, you need to monitor each cell to prevent from deep discharge or over charge.  The BMS will give you information about the cell voltage levels and can issue warnings if there is a problem with any of the cells.

The BMS with balancing option will balance the cells (usually during charging) to make sure all cells have the same capacity (=voltage) levels.

The BMS also allows data logging so that you can see the history of the operation of the each cell in the battery. This way you can detect if there is any problem with one or more cells in the battery pack.

16.02.2018
 
Maximal voltage during Initial charge of LiFePO4

Maximal voltage during Initial charge of LiFePO4

 I want to make the initial charge of all the LiFePO4 cells to the same maximal voltage level of 4.0V. How can I do that?

 

EDIT: This article gives the example of 4.00V charge level. The same information is to applied for charging to other voltage levels: e.g. 3.65V, 3.70V, 3.80V, 3.90V. Different voltage levels may be applied for initial charging based on the manufacturer specification.

ANSWER: The best way it to find a power supply or a charger that will charge to the 4.0V directly.  Another solution is to charge using the laboratory power supply or the regulated power supply that allows to set the final (maximal) voltage limit. We suggest to check with the local electronic components suppliers for these products.

   ...more >>

09.02.2018
 
How does GWL/Power support the customer’s co-operation?

How does GWL/Power support the customer’s co-operation?

We always look for partners who are active in promoting and supporting the DC-power solutions. These partners are usually individuals and companies who are creating solutions with the DC power components. For example the installers of home energy storage solutions, solar panel installers, boat installers, people who convert cars to EV, companies and business that use the lithium batteries for their products, etc.

See the ideas we published in the past:

We are happy to support such partners by special pricing and favorable delivery and payment terms so that we can help to make bases for sustaining their business.  When our partners create information about their work, we are always pleased to support the co-operation by directing customers to our partners.

   ...more >>

09.02.2018
 
History of LiFePO4 Winston technology

History of LiFePO4 technology

Difference between Winston Battery and other brands (1)

What is the primary difference between the Winston Battery LiFePO4 products and other brands that also offer prismatic cells?

1. Technology history

Thundersky Winston Battery

The Thunder Sky Winston Battery company was the originator of the large capacity technology for the prismatic cells. The technology was created by Mr. Winston Chung. By means of partnerships with several companies TS-WB transferred the production facilities to partner factories. However the core know-how and technology processes were retained by Mr. Winston Chung.

   ...more >>

09.02.2018
 
A combined Energy solution - Alfons container

Alfons solution Alfons container

Alfons container Alfons container

A combined Energy Solution - Alfons Container

GWL/Power supplied the Winston Battery cells for the integrated hybrid energy solution called “Container Alfons”.  This solution integrates the energy from three sources - solar, wind and a backup diesel generator.

Be sure to contact GWL/Power for more details and for the reference to this and similar projects. 

09.02.2018
 
Welcome in 2018

Best wishes in 2018

Welcome in 2018!

It is the 10th year of our battery related activities. We started in 2008 with the support LiFePO4 high power industrial cells.  We keep working after the 10 years and we keep building on our experience over the many years. 

Stay with us for more news and details. 

The GWL/Power team!

09.02.2018
 
Operating temperature of LFP Cells

Temperature of cells

The temperature of the LFP cells

What is the operating temperature of the LFP cells?

The operating temperature of the LFP cells is based on the specification and the application.  There are several points to be clarified in this matter.  The first to clarify is the three different temperatures in relation to the batteries.

The ambient temperature

The ambient temperature is usually given as the air temperature of any environment where the batteries and related equipment are kept.  The ambient temperature is given at the specification of the cells.  It is also called the operation temperature.

   ...more >>

22.12.2017
 
Packing of Sinopoly cells

    

 

The photos show the packing of the Sinopoly cells. The cells are packed in wooden boxes that meet the ADR safety regulations for the transport of dangerous goods. 

22.12.2017
 
LFP Pouch Cells by GWL

 

In addition to regular prismatic cells, GWL/Power also offers the special types of cells that meet the requirements of customers for individual projects. 

Check our offer the special types of LFP cells.

22.12.2017
 
Production fault - reversed polarity

 

Sometimes a mistake may happen…. This photo shows a ZG-LFP 20AH cell that has a reversed polarity marking. The problem was cased during the final part of the production, as the outer sleeve with the polarity symbols (plus/minus signs) was put in opposite direction.  The cell is completely OK, only the marking is reversed. 

This real situation shows that even after a multiple checking of the production, a faulty product may slip out. This case also shows the need for the final responsibility of checking during the installation of the cells. There is always need to check everything to the very last detail and not relying just on signs and marking. 

In this case we have honored the warranty and replaced the cell with another new cells with proper marking.

21.12.2017
 
Become the battery specialist and visit GWL Power in Prague for the Battery Technology Training Seminar

 

The Battery Technology Training Seminar – March 9th 2017, Prague, Czech Republic

Become the battery specialist and visit GWL/Power in Prague for a battery technology training seminar. 

GWL/Power invites you to come, meet members of GWL and Sinopoly team face to face, learn more about LiFePO4 technology and other related topics.  The training includes the presentations, discussions and technology demonstrations.

Check here for more details

21.12.2017
 
The voltage levels for BMS

 

he BMS provided by GWL are primarily designed for the LFP cells (2.0V to 3.8V). Some BMS models support the LTO and Li-Ion cells as well. 

BMS123Smart - supports LFP and Li-Ion, does not support LTO 

BMS2405 - supports LFP,  Li-Ion and LTO

   ...more >>

19.12.2017
 
Three million AH - Sinopoly Test Data and Project Reference

 

Check the update for the Sinopoly Test Data for the test of the 200AH cell. 

See the project reference using the Sinopoly battery products. 

See more here at  special page: Celebrate with us - over 3 milion Ah sold in the Sinopoly cells!

19.12.2017
 
Mickey Mouse at GWL/Power Training

      

 

Some customers are rather exotic. We had a customer who came to our training in the mask of the Mickey Mouse.  This is not a fun, this is a reality. 

The customer was wearing the Mickey Mouse dress the whole training and was happy to take many photos. 

Simply do not worry, be happy! Everything is possible at GWL/Power!

19.12.2017
 
New current measuring options for LAN Controller

 

New extension accessory current sensor for LAN Controller 2.0 is available for your projects - LAN-MOD-CS709. It allows to measure up to +/- 75A in circuits up to 277V AC/DC. Check our offer of LAN Controller extension sensors. Follow the pictures for complete installation and setup instructions.

18.12.2017
 
GWL/Power Simple Battery Management Board 4 cells (12V/16A)

 

The SBM04/16H is designed for a simple protection of the 12V battery packs using the 3.2V LFP cells. 

The SBM has higher rating resistors (bigger ones) so that the balancing current is little bigger. For even higher balancing currents we suggest adding the CBM1 module or modules. The examples of the installation are here: 12V battery24V battery48V battery.

18.12.2017
 
SBM for 24 cells (72V)

 

The SBM board SBM24/40 is specially designed for high-power EV-Bikes and e-Scooter projects with voltage 72V (24 LiFePO4 cells).

18.12.2017
 
Winston Battery - New Factory

A rare photo from the WB factory….

18.12.2017
 
BMS123 Smart with Victron inverters

 

Check the connection of the BMS123 Smart with thetThe Victron inverters: These are equipped with AUX I/O (allow to charge) and Temp sense (allow to discharger ports. The charge/discharge contact functionality is available only in case the Lithium assistant function is activated.

18.12.2017
 
Sinopoly 300AH cell discharge diagram

graf

The diagram shows the discharge of the Sinopoly 300AH cell at 0.3C rate, at room temperature. This is a 100% DOD cycle, with discharge up to 2.5V.  

This diagram shows that reaching the 3.0V level at the 0.3C rating corresponds to 90% DOD. 

Be sure to contact us for more support about the LiFePO4 cells. 

18.12.2017
 
GWL/Power BMS123 Smart - Extended Module

BMS       bms_smart

 

Extended module for advanced applications like automotive, boat and other applications using the BMS123 Smart.

The module adds the following functionality to the BMS123 Smart system:

  • 4 configurable relays - switch relay on at time or conditions
       
  • 2 individual CAN bus connections
      
  • Control Elcon/TC Charger via CAN bus interface
     
  • Broadcast BMS settings on CAN bus
      
  • Compatible with EV charging stations using the J1772/IEC 62196 protocol - adaptive charging. Extended module limits charging current to the maximum current of the charging station/vehicle.
      
  •    ...more >>

01.12.2017
 
Check the batteries (cells) before the installation!

 

Always check the technical specification of the cells and other products BEFORE the installation. 

Check the voltage, polarity, dimensions, mechanical shape, the proper design of the terminals, etc. Be sure to report any strange conditions to us BEFORE the operation and installation of the cell or other product. 

We will be happy to provide support for any irregular situation.

Learn more at the “Important information for batteries” page.

01.12.2017
 
The Sinopoly Battery Seminar

  

 

GWL/Power has organized a specialized seminar for the LiFePO4 battery technology. See the photos from The Sinopoly Battery Technology Training Seminar on 9th of March.

09.11.2017
 
EVMosquit is here!

         

 

he EVMosquit is a hybrid between an electric bike and scooter! Enjoy the comfort of the electric bike with the speed of the electric scooter. 

09.11.2017
 
EVMosquit at InterSolar 2017

 

We will be showing the EVMosquit at InterSolar 2017. Come to check with us at Intersolar 2017: Hall B2, Booth 459

If you want more details about EVMosquit now, please contact our technical department

09.11.2017
 
High power cells at GWL/Power Booth at Intersolar / ESS 2017

 

For 8+ years, GWL/Power’s main focus is on the large industrial prismatic cells for energy storage, traction systems and all purpose applications. 

Together with our key supplier Thudersky Winston Battery, we were promoting the large capacity cells from 40AH to 1000AH

Did you not have chance to get more details at InterSolar? Do you wish to know more?  Be sure to contact us for more technical details, projects applications and solutions.

08.11.2017
 
Promotion of the ZG Cells at InterSolar/ESS 2017

 

GWL/Power has been promoting the small size cells ZG 20 AH and 60AH

These cells are suitable for high power applications with continuous currents of 3C to 5C. 

Be sure to follow with us for more details on the application of these cells.

08.11.2017
 
GWL/Power and Winston Battery Booth at Intersolar/ESS 2017

 

The photos of the GWL/Power booth at Hall B2, Booth 459.  Together with our main partner ThunderSky Winston Battery, we have setup the booth in our favorite design. We have been using this design for last 3 years (2015, 2016, and now 2017). 

We thank to all of our customers, partners, old  and new friends to come to our booth. 

We are happy to be available to realize your DC power related projects.

09.08.2017
 
Warning of the Internet Frauds

Warning of the Internet Frauds

We kindly remind the customers of the need to be very careful about some types of internet frauds related to payments and refunds.

In recent months GWL/Power has experienced some kind of attacks. Some hackers pretended to be the sales person of GWL and asked the customer to change the payment information to another account.   The hackers compromised the email account and sent faked emails and created faked modified order confirmations with a fake bank account.

We kindly ask all of our customers to take note of these illegal activities.   In case there is any change in payment details, it is always better to wait, resend the copy to more employees of GWL/Power and verify by phone, Skype or some other channels.

When making the payment, always verify the payment details as published on our web pages.

   ...more >>

06.06.2017
 
GWL/Power and Winston Battery Booth at Intersolar/ESS 2017

 

GWL/Power and Winston Battery Booth at Intersolar/ESS 2017

The photos of the GWL/Power booth at Hall B2, Booth 459.  Together with our main partner ThunderSky Winston Battery, we have setup the booth in our favorite design. We have been using this design for last 3 years (2015, 2016, and now 2017). 

We thank to all of our customers, partners, old  and new friends to come to our booth. 

We are happy to be available to realize your DC power related projects.

26.04.2013
 
Mobile Energy Storage - possible!

Mobile Energy Storage - possible!

Another example of an energy solution using the Lithium Iron Batteries!

09.02.2013
 
And Yet It Moves!

And Yet It Moves!

Italian: Eppur si muove - a phrase said to have been uttered by the Italian mathematician, physicist and philosopher Galileo Galilei (1564–1642).

What about the circles at the picture? Do they move?

The standing, yet rotating circles, represent the innovative ideas that we wish to bring before the general public to move the thinking of people with new concepts and priciples - for example the GridFree concept! 

31.01.2013
 
The AC socket Ethernet Controller 230V/16A

The AC socket Ethernet Controller 230V/16A

The easiest way to manage the AC devices remotely using the IP ethernet protocol. The switch is equipped with the RJ45 Ethernet port for remote control of connected appliances. Installing and setting of the switch is quick and easy.

http://www.ev-power.eu/_d3060.html

24.01.2013
 
Be careful about the DC voltage accidents!

Be careful about the DC voltage accidents!

28.12.2012
 
mFi Technology Demonstration Board

mFi Technology Demonstration Board

We are finishing the installation of a demonstration board to show the possibilities and functions of the mFi technology. This board will be visible to customers who come to our facility, or we may take it to exhibitions in 2013.

18.12.2012
 
The web traffic of the EV-POWER.EU and the GWL/Blog pages

The web traffic of the EV-POWER.EU and the GWL/Blog pages

The two screens show the web traffic of our GWL/Power group main pages.

Interestingly: only 14% of the visitors to the EV-POWER.EU  come to the GWL/Blog pages. This shows the constant need for increasing the level of technical education and technological awareness of the internet audiences.

17.12.2012
 
A simple solution to protect against short-circuit

A simple solution to protect against short-circuit

We strongly recommend to have all instruments and tools fully insulated against accidental short-circuit.

12.12.2012
 
Proper Fusing is Vital for LFP Safety

Proper Fusing is Vital for LFP Safety

We remind all customers to apply proper fusing for any DC power installations.  The fusing and/or DC circuit brakers will limit the risks of serious accidents in case of battery DC short-circuit.

15.11.2012
 
The gardening and the farming is so easy with EVBarrow!

The gardening and the farming is so easy with EVBarrow!

Check some model photos of the EVBarrow.

The technical parameters of EVbarrow

  • Weight: 28 kg
  • Maximum load capacity: 120 kg
  • Travel speed: 3.2 - 4 km / hr.
  •    ...more >>

15.11.2012
 
EVBarrow - detailed photos

EVBarrow - detailed photos

Check the technical photos of the EVBarrow - electric wheel barrow components: the 12V-inwheel motor and the installation, the electric hand-grip, battery installation under the chasis, details of the mechanical brake switch,

11.11.2012
 
FAQ: Transport of batteries -  why  restrictions?

FAQ: Transport of batteries -  why  restrictions? 

Transport of certain goods classified as Dangerous Goods (ADR) need to follow global transport limitations. Even though LiFePO4 batteries are extremely durable against abuse and cannot explode, the LiFePO4 technology is still listed as dangerous under category CLASS 9 (Miscellaneous). All classes of ADR are following regulation of transport presented by ICAO Technical Instructions, IATA Dangerous Goods Regulations and the International Maritime Dangerous Goods Code.

In partnership with TNT, we provide safe transport of batteries to many destinations in Europe. Check with us for the updated list of locations in Europe.

For delivery to other locations, we recommend that you arrange your own courier or shipping agent to handle the shipment of the dangerous goods to your country.

11.11.2012
 
The power of electric induction

The power of electric induction

A simple mistake:  the cable rolled up on a wheel-cable extension cord used to charge an EV. Never forget that even few loops on a cable can cause severe heating by electric induction.

06.11.2012
 
Installing UBNT mFi sensors for GridFree application

Installing UBNT mFi sensors for GridFree application

Installing two mFi current sensors to measure the AC currents in a GridFree installation. More details to come soon…

27.10.2012
 
EVBarrow from eCarTec reported by the Süddeutche Zeitung

EVBarrow from eCarTec reported by the Süddeutche Zeitung

26.10.2012
 
EVBarrow at the eCarTec show 2012

EVBarrow at the eCarTec show 2012

26.10.2012
 
EVDock at the eCarTec

EVDock at the eCarTec

We were showing the EVDock at the eCarTec 2012 in Munich.

26.10.2012
 
EVDock - promotion

EVDock - promotion

If you are interested to have your own EVDock, be sure to contact us for details. We will send you the special promotion price.

26.10.2012
 
EVBarrow - the details of the frame

EVBarrow - the details of the frame

The robust frame of the EVBarrow and 12V electric traction motor.

19.10.2012
 
EVBarrow - the electromobility for gardens and farms

EVBarrow - the electromobility for gardens and farms

Concerning the usage of the wheelbarrow, nothing special has changed since the time of the middle-ages.  With the EVBarrow, it is the time to make the change now.

19.10.2012
 
EVBarrow - get your wheelbarrow powered by electricity

EVBarrow - get your wheelbarrow powered by electricity

A solution for the electromobility for every garden and farm. Make your life easy with the EV powered EVBarrow. Up to 400W of power gives you the drive to move the loads faster and with no hard labor.

German: Moderne Schubkarre - eine EV Schubkarre (in der Schweiz auch Garette oder Karette, in Österreich auch Scheibtruhe)

28.09.2012
 
The EVKart project reference

The EVKart project reference

The technical university in Pilsen has been working on a EVKart project of a fully electric racing go-kart. It can reach up to 160 km/h without any noise, smell and dirty emissions.

17.09.2012
 
Visit us at eCarTec 2012!

Visit us at eCarTec 2012!

Come to meet us at Munich – October 23rd to 25th. HALL 2D, booth 520. Right in the middle of the biggest automotive players. We will be showing the latest products and solutions for the DC power. Register at our web page to get the free ticket for the exhibition. We welcome all customers, fans and friend to see us and talk to us.

15.09.2012
 
The 134 kWh energy storage island system with integration to SMA invertors

The 134 kWh energy storage island system with integration to SMA invertors

Large capacity bank of the LiFeYPO4 cells is providing 134kWh storage system that works with a string of SMA invertors to give 80kW peak power.

Please contact us for details about this project.

12.09.2012
 
Tons of LiFePO4 cells and batteries received

Tons of LiFePO4 cells and batteries received

After a period of delays, we have received a huge shipment of the LiFeYPO4 cells and batteries. Your orders will be processed soon. If you wish to place new orders, it is the right time now.

08.08.2012
 
GWL/Power visit to Sinopoly Factory in China

GWL/Power visit to Sinopoly Factory in China

GWL/Power representative made a visit to the new factory of the Sinopoly Group in China. We have recently added the Sinopoly products to offer offer. You can check and order the Sinopoly LiFePO4 models at our web on-line.

17.06.2012
 
A few more photos from InterSolar 2012

A few more photos from InterSolar 2012

06.06.2012
 
EVBIKE generator tests

EVBIKE “generator” tests

We are testing the EVBIKE motor to work as an electricity generator.

05.06.2012
 
GWL/Power at InterSolar 2012 - Munich - Hall B4.240 - June 13th-15th

GWL/Power at InterSolar 2012 - Munich - Hall B4.240 - June 13th-15th

Come and visit us at InterSolar 2012 - Munich - Hall B4.240. Check our location in Hall B4 

16.04.2012
 
Proper wiring - the basic requirement for any current instalations

Proper wiring - the basic requirement for any current instalations

For any installation, both AC and DC currents, the quality of the cabling is the basic requirement for the success of the installation. Without the proper cabling the final solution may not work properly or can cause a hazardous situation - like fire or sparking.

The photos show a warning example of an improper wiring.

14.04.2012
 
FAQ: Can I connect a charger permanently to the battery?

Such connection is not recommended and may not work properly. There are several reasons.

The danger of deep discharge of the battery after the charging is finished. Most chargers have some minimal consumption when connected to the battery. If the charger is left connected for a long period of time, the charger may discharge and deplete the battery completely.

Need to reconnect to resume function.  Most chargers need to reconnect to resume the charging function. If the charger is connected permanently it will not resume charging unless the terminals are disconnected for some time and connected again.

The danger of an accident. The charger’s electronic may not be designed to be permanently connected to the battery if not charging any longer. After some time some components may overheat or become defective. In any case, we always recommend having proper fusing and disconnection option for any cabling connected to batteries. This allows disconnecting the batteries in case of an accidental short circuit connection or malfunction.

An idea: to allow repeated charging of batteries without the need for manual reconnection, the hint may be to use some timer device that will connect the batteries to the charger to allow the charging. However again we give the warning, that any battery charging must be properly monitored by a human operator.

02.04.2012
 
Get Ready for Price Increase

Get Ready for Price Increase

As most lithium technology products, cells, batteries and even the raw materials come from China, the price is closely dependent on the value of the Chinese currency RMB.

As the Chinese RMB is increasing in its value, the cost of the products from China is increasing as well.

Get ready for the price of the lithium products to increase by at leat 10% during the 2012.

01.04.2012
 
Current Carrying Capacity of RADOX cables (up to 150*C)

Current Carrying Capacity of RADOX cables (up to 150*C)

The 35mm RADOX cable can carry upto 370Amp continually.

(Please compare with the standard currents per copper cables as defined by the German technical norm VDE 0298-4/2003.)

01.04.2012
 
Radox Shielded Battery Cables

Radox Shielded Battery Cables

Check the specifications of the high quality battery and EV cables. PDF File.

15.03.2012
 
GWL and CALB to increase the market share in European lithium sales

GWL and CALB to increase the market share in European lithium sales

Prague, March 12th, 2012: China Aviation Lithium Battery (CALB) announced the plans to increase the distribution share for the lithium battery products in the European Market. 

Following the visit of the leading European distributor GWL/Power, the CALB deputy manager Mr. Rong Fang summarized the plans for CALB to expand on the international sales in Europe: „We are looking for partners, we are looking for strong partners, we are looking for advanced partners who will increase the value of the CALB business.“

GWL/Power has become CALB’s key distribution partner with stocking area of 3800 m2.  At present GWL offers the well-reputed SE series of the CALB models. Starting from April, the new models of the CA series will also become available to the European customers.

   ...more >>

14.03.2012
 
The new on-line shop of GWL/Power Europe!

The new on-line shop of GWL/Power Europe! 

Starting from March 13th, 2012 we are improving our on-line web business system to a new web shop with many new user functions.  More goods and more products from growing number of suppliers were added to the on-line ordering system. We have checked-up to the pricing and updated the products range.

Be sure to order on-line:  During the month of March you can get an additional discount of up to 3% for your new on-line orders.

04.03.2012
 
Making orders from GWL/Europe or from China. Which to choose?

 

Making orders from GWL/Europe or from China. Which to choose?

Get details about the difference when ordering from GWL and from China.

31.01.2012
 
The Edison bulb

 

The Edison bulb

In 1879, Edison made a successful demonstration the electric light bulb. Following the success, Edison started commercial production of the Edison bulbs. Please see a photo of the 220V Edison brand bulb in comparison with the modern time 230V bulb. The modern time bulb is smaller and using a thinner glass so it is lighter and requires less material for production.

28.01.2012
 
Wind Power Energy Output and Force Calculation

Wind Power Energy Output and Force Calculation

What is the energy output a wind turbine can generate? What is the force the mast (pole; holder) of the wind turbine must withstand during strong winds?  Check our interactive XLS to see the answer. 

21.01.2012
 
FAQ: Replacing a defective cell with a new cell

FAQ: Replacing a defective cell with a new cell

Question: I have bought 50 lithium cells. After 3 years, I have found out that one or two cells are defective. How can I replace the defective cell?

Answer: Generally said you can replace a defective cell in a string of LFP cells with a new cell of the same capacity (or higher capacity).  As the new call has full capacity performance, the new cell will not influence the performance of the whole pack. Some customers decide to buy some extra cells to have them on hand in case of a cell failure. However in order to keep these extra cells fresh over a period of many years, it is necessary to charge and discharge the extra cells from time to time.

Note: most cell failures are direct results of deep discharge, over charge or improper balancing. We strictly recommend avoiding such situations to keep the long lifetime of the cells.

14.01.2012
 
FAQ: What is the capacity of a SuperCap?

 

FAQ: What is the capacity of a SuperCap?

The calculation is showed in the picture. For a 6000 F capacitor working with 2.5V nominal voltage, the total energy is 5.2 Wh. Divided by the discharge voltage of 2V, the capacity is 2.6 Ah.

The Result: 6000 Farad  SuperCap at 2.5V has about 2.6 Ah capacity.  To make a 12V 40Ah SuperCap “battery” you need 112 pieces of 6000 F super capacitors (16P7S configuration).  (Source)

14.01.2012
 
The difference between Li-ion and LiFePO4 - marking of the products and documents

The difference between Li-ion and LiFePO4 - marking of the products and documents

Question: I have ordered the battery and charger from your company. Your specification says it is the „LiFePO4“ battery and charger. Now, I have received the shipment and I feel puzzled. The invoice form the Customs office says: Tarric Code: 8507 80 30 Lithium-ion cells.  The packing list from TNT cargo mentions: Material Safety Sheet for Li-on cells and batteries. The box of the cells has the labeling „Li-on battery“.  Even the charger has the text: “Charger for Li-ion battery”. I am afraid you sold me some other cells not the LiFePO4. Is it Li-ion or LiFePO4? Why is LiFePO4 not mentioned in these official documents and on the products?

Answer: Please be sure that we really sell the LiFePO4 technology as mentioned at each of the product or at the cell, at the battery and the equipment specification. We are testing all products that we sell to be sure that the real performance meets the specifications. The products you received are li-on cells with LiFePO4 chemistry.

   ...more >>

09.01.2012
 
Visit our company - photos from our office and warehouse

Visit our company - photos from our office and warehouse

We wish our customer to see that we are a regular company with business office, warehouse, training center, employees, etc. etc.  This will give you the trust to co-operate with us. If you wish to get any details or information about our company, please do not hesitate to ask. Check the link with photos here.

You are of cause warmly invided to come to Prague, to see and meet face to face.

05.01.2012
 
Welcome in 2012!

Welcome in 2012!

We hope to increase our technical support and services. We plan to add new products, battery brands and models. We are looking forward to co-operation with our customers!

08.12.2011
 
A Simple Wind-Power solution

A Simple Wind-Power solution

A complete solution with for wind-power energy including a small weather proof booth to shelter the storage battery and regulators/invertors. With 1000W wind power generator, it is possible to harvest some 18 kWh of evergy per day (at a windy location.)

03.12.2011
 
The Winston Battery Safety Information

The Winston Battery Safety Information

Download the Winston Battery Safety Information PDF.

16.11.2011
 
EV-POWER.EU - 1 000 000 page views reached - November 16th, 2011

 

EV-POWER.EU - 1 000 000 page views reached - November 16th, 2011

We thank our customers and all visitors of our main web pages at http://www.ev-power.eu/

05.11.2011
 
Training: Lithium Battery Technology Expert – October 2011

 

Training: Lithium Battery Technology Expert – October 2011

Photos from the one-day training that helps you to become the lithium battery expert and to understand the advantages of the lithium battery technology. The training consists of a block of lectures together with seminars, question and answers sessions and practical labs. These labs will help you to assemble your own battery pack and practice proper charging and discharging.

   ...more >>

05.11.2011
 
The Winston Battery Exhibition place at eCarTec 2011

 

The Winston Battery Exhibition place at eCarTec 2011

05.11.2011
 
RT BMS demonstration setup (shown at eCarTec 2011)

RT BMS demonstration setup (shown at eCarTec 2011)

You can see this BMS demonstration installation when visiting our company personally. You will be working with this BMS setup when attending the lithium battery training. We were showing this demonstration at eCarTec 2011 in Munich.

05.11.2011
 
Thank you for visiting us at the eCarTec 2011

Our stand at eCarTec A6-603
The Super El and GWL/Scooty
The stand with EVBIKE kit in focus

 

Thank you for visiting us at the eCarTec 2011

We thank all our customers who came to visit our booth at eCarTec 2011 in Munich. Our exhibition booth was at A6, stand 603.  Check some of the photos at the GWL Power on the exhibition eCarTec 2011 gallery.

05.11.2011
 
our PPT presentation

 

Download our PPT presentation that we displayed at eCarTec 2011. The presentation will help you to get to know our products and solutions.

05.11.2011
 
GWL Power Overview Catalogue at eCarTec 2011 (2)

GWL Power Overview Catalogue at eCarTec 2011 (2)

05.11.2011
 
GWL Power Overview Catalogue at eCarTec 2011 (1)

GWL Power Overview Catalogue at eCarTec 2011 (1)

05.11.2011
 
GWL Power Promotion Leaflet at eCarTec 2011

 

GWL Power Promotion Leaflet at eCarTec 2011

10.10.2011
 
The DC motor setup

DC motor components
Components with cabling

The DC motor setup

Agni DC motor + Evnetics Soliton Jr installed for the eCarTec demo setup.

05.10.2011
 
Visit us at eCarTec Munich - October 18 - 20

 

You are warmly invited to visit the GWL/Power stand at eCarTec 2011!

Hall A6 - STAND 603   - see our details at the Exhibitor database

Please register ON-LINE (using the form bellow) to get a FREE Ticket from GWL to come to meet us.

(The dead-line for processing the requests is October 14th, 2011)      


The offer of free registration was closed on October 14th at 12:00.

If you wish to come to eCarTec, please purchase the regular ticket on-line at http://www.ecartec.de/index.php?id=4

Thank you!

02.10.2011
 
Mounting cells using the strapping belts

Mounting cells using the strapping belts

Check more details here….

13.09.2011
 
Training: Lithium Battery Technology Expert – October 2011

Training: Lithium Battery Technology Expert – October 2011

The training takes place on October 7th, in Prague, Czech Republic. The training is limited to 20 persons per one-day. Please place your request first to get a confirmation.

Become the expert in battery technology! Get the know-how in the most progressive field of energy storage. The one-day training will help you to understand the advantages of the lithium battery technology. You will learn the details about the battery pack configuration and management. You will learn how to operate a BMS system. The training consists of a block of lectures together with seminars, question and answers sessions and practical labs. These labs will help you to assemble your own battery pack and practice proper charging and discharging.

See more details here at EV-POWER.EU.

04.09.2011
 
A cartoon about EV cars

A cartoon about EV cars

27.07.2011
 
What is the recent price development for the lithium batteries?

What is the recent price development for the lithium batteries?

Answer: The demand for quality lithium batteries is growing. However only few producers can manufacture high capacity cells with guaranteed quality at good price. This means that the demand is increasing. When demand is increasing the price is increasing as well.

Additionally the costs of the raw materials (the chemical products and metals) are growing rapidly. This is another key reason the price of the batteries is growing high. The lithium batteries are mainly manufactured in China. The production costs in China are as well increasing: labor costs increase, the energy and transportation fee increase, the local government fees and taxes increase.

The conclusion is simple: the price of the lithium batteries will be growing.

19.07.2011
 
Short cutted cell, no fire, no explosion

Improper packing of additional mounting hardware can cause a severe energy/heat discharge. The metalic parts can make the short-circuit of the cell terminals.  Never allow the terminals to be in short-circuit.

10.07.2011
 
EVKart - Electric Racing Cart

EVKart - Electric Racing Cart

10.07.2011
 
GO-Electro VW Squareback (1969 VW Type3)

GO-Electro VW Squareback (1969 VW Type3)

Another reference project of one of our customers. (Courtesy of http://www.go-electro.nl/ )

08.07.2011
 
FAQ: The Order Process Timing

Question: I see the stock now is at 0 pcs for the ordered batteries. Does that mean I have to wait until the next delivery?

Answer: Please note that we make the booking of the goods based on the order time. However if the customer with an older  order does not take the goods on time, this older order is canceled and the goods is pased to the following open orders.  

See this example: One customer sends an order for 100 pcs, following that, 5 other customers send orders for 20 pcs each. If the first customer does not pay and get the order in time, his order will be canceled and the 100 pcs will be passed to the following waiting customers. 

This means that even though the free stock is booked for the moment, it is possible that the new orders will be delivered even before the new shipment arrives. 

GWL/Power employees keep checking the goods on daily basis and they will inform the customers about the delivery time or they will notify you, if there is any change in the delivery timing.

Additionally we may have some special stock for extra VIP clients. We may release some of the goods to other customers that require additional preference. The GWL/Power sales employees will give details to such customers.

04.06.2011
 
We are installing EV scooters for EV project in Prague

We are installing EV scooters for EV project in Prague

…. more news to follow….

30.05.2011
 
Simple solar solution for off-grid applications

Simple solar solution for off-grid applications

This is our demonstration panel for simple solar solutions based on the 12V LP batteries. Check with us if you need such solutions.

24.05.2011
 
Multiplying Socket to allow parallel charging of 12V blocks

Multiplying Socket
Multiplying Socket Detail
Multiplying Socket 3 to 1

Multiplying Socket to allow parallel charging of 12V blocks

We have made a Multiplying Socket to allow to charge more 12V LP block from a high speed charger.

One charger can charge up to 3 blocks at one time.

15.05.2011
 
The cost of the electric energy in China

The cost of the electric energy in China

RMB 0.4883 per kWh.  Oh, how cheap!   (See the other pricing at Auto88)

02.05.2011
 
The need for simple mobility - EV Tricycle

The need for simple mobility - EV Tricycle

While the official vehicle manufacturers are ever delaying the coming of the EV vehicles, there are many simple mobility projects that go ahead with the EV solutions. (Link)

29.04.2011
 
Beware of the danger of electric shock, burns and sparks!

Beware of the danger of electric shock, burns and sparks!

The photo shows that even skilled profesionals can make a mistake and burn the battery terminal in a fraction of a second……..

The lesson learned is: Pay more than a usual attention to your work when assembling the battery packs and sets.

07.04.2011
 
EVTraxer platform chargered from solar panels

EVTraxer platform chargered from solar panels

Our experimetal photo shows the charging of the EVTraxer platform batteries directly from solar power. 

We will be publishing our direct solar charging solutions soon. Check our blog for more details later.

07.04.2011
 
Size of the terminal connectors for 40AH cells

Size of the terminal connectors for 40AH cells

Product code LFP040-CON

04.04.2011
 
Why you may need to queue up for the orders. Delivery information

Why you may need to queue up for the orders. Delivery information

FAQ1:  I wish to order some batteries from your web shop.  I keep checking the stock quantity of the model for many weeks, but the quantity is always „zero“. When will you receive the goods?

Answer:  You can place your order without waiting for the stock quantity to appear on the web shop. Please take note that we process orders based on the payment of the order. This means: if you keep waiting and do not place your order, other customers may go ahead and place (and pay) their order.  As a result when the goods arrive, the goods is booked to these orders first and no free on stock may be left.  We suggest you place your order rather then keep waiting.

FAQ2:  Your sales colleagues told me that the new shipment would arrive in March. However in March no goods was available to order. I am unhappy that I need to wait for so long time.

   ...more >>

03.04.2011
 
EVKart installation continues

EVKart installation continues

We plan to have the EVKart V2 running in the beginning of April. More details to follow.

16.03.2011
 
The electric power boat in Croatia

The electric boat at sea...
The battery pack using 200Ah cells

The electric power boat in Croatia

… using the Agni motors and the LFP 200AH cells equipped with RT-BMS.

Photo courtesy of ABA VELA d.o.o., Split, CROATIA

07.03.2011
 
EVKart project - installing 72V/60Ah pack

EVKart project - installing 72V/60Ah pack

The new improved EVKart project will be using 6 pcs of 12V 60Ah batteries to take the total of 72V/60Ah battery pack. The pack consists of 3 identical 24V/60Ah pack that can be easily changed.

05.03.2011
 
Another installation diagram for the off-grid solutions

Another installation diagram for the off-grid solutions

04.03.2011
 
Installing the LFP batteries for UPS

Two 12V 20AH LP batteries - 7.24 kg

Installing the LFP batteries for UPS

The two LP 12V 20AH batteries provide up to 500Wh of energy, a double value of the SLA batteries. Using bigger batteries (40AH, 60AH…) can even multiply the performace.

04.03.2011
 
Replacing SLA in the UPS with LFP

UPS battery pack 4x SLA
10.90 kg of lead acid "trash"
Chinese OEM under the APC sticker

Replacing SLA in the UPS with LFP

Multiply the performance of any UPS (Uninterruptable Power Source) by replacing the SLA (Sealed Lead Acid) batteries with the LFP (Lithium Phosphate) technology.

The old battery pack on the photos is from APC 1000VA rack UPS model. The nominal capacity of the pack is 24V 14Ah (2S2P configuration). The real energy available from the pack is max 250Wh. This means that a 250W computer may run up to 60 minutes from the UPS with the original SLA battery.

26.02.2011
 
Evnetics Soliton High Power DC motor controllers

Evnetics Soliton High Power DC motor controllers

Soliton1 - 300kW, Soliton Jr - 175 kW - check our offer here

19.02.2011
 
Safety reminder, discharge currents

Keep in mind that the energy stored in the lithium cells may cause severe burns or fires if discharged improperly.  source

16.02.2011
 
Assembling 12 pcs of 3.2V cells into a 36V 20Ah pack

Assembling 12 pcs of 3.2V cells into a 36V 20Ah pack

16.02.2011
 
FIAT Seicento Elettra - conversion to lithium

FIAT Seicento Elettra - conversion to lithium

 

Another lithium conversion project using the 12V LP batteries. Fiat 600 Elettra will be converted to full LiFeYPO4 battery traction. 

Check the original forum in Italian.

01.02.2011
 
FAQ: The proper installation the key to success for the BMS function

 

FAQ: The proper installation the key to success for the BMS function

Over the past two years of supporting the customers with the RT-BMS (and other management solutions), we have learned the most frequent installation faults that can cause the BMS system not to be working properly.

Please note, that one  „missing CBU“ can lead to a damage of the whole battery pack, if operated for a long time without inspection.

The frequent installation faults:

  • Improper cabling of the 10 pin flat cable – the result: some of the CBUs are not find during the boot-up of the whole system.  Solution:  check the flat cable and/or replace the cable if needed
  • Humidity, water drops, and wetness on the CBU boards – the result: oxidation of the CBUs, malfunction of the CBUs. Solution:  the CBUs must be protected against moisture and water.  Please change the installation to allow such a protection.
  •    ...more >>

30.01.2011
 
Battery Delivery Information (Jan 30, 2011)

 

Battery Delivery Information (Jan 30, 2011)

Unfortunatelly, we learned that the sea cargo with batteries is delayed for at least 4 or 5 weeks. This means that the battery delivery originally scheduled for February 15th will be delayed up to March 15th ~ 20th.

Also, due to the busy production and the Chinese New Year holidays, the upcoming cargo will also be delayed. The estimated delivery is now June 1st.

13.02.2010
 
Making your own terminal connectors - as short as you need

Material needed for the assembly
Higher currents need more strips
Strips isolated by rubber belt
Ready to shrink by heating

 

Making your own terminal connectors - as short as you need

11.02.2010
 
Double-metal washers Al-Cu (aluminium - copper)

Double-metal washers Al-Cu (aluminium - copper)

These special washers are designed to prevent galvanic corrosion of copper cables attached to aliminium contacts (as on ThunderSky batteries).  One side is quality copper coating layer, the other side is aluminium. Please contact us for a quote. (Min. order qnty is 100 pcs)

09.02.2010
 
Would you like to have some tea or coffee?

Would you like to have some tea or coffee?

We use the electric kettle-pots as discharging load during our tests… turning electricity into a lot of hot water. We paid some $10 for each kettle in Makro/Metro.

03.02.2010
 
LiFePO4 is ideal for the Electric Wheelchairs power supply!

LiFePO4 is ideal for the Electric Wheelchairs power supply!

Understand the benefits now:  100% safe - no lead, no dangerous acids. Much lighter (30% weight) - 12V 100Ah LFP battery is only 14 kg. Higher capacity - 145% when compared to lead-acid. The visiblle benefit: the increase of the driving distance. Works even in -35 deg C - no problems in winter. Fast charging possible. LFP batteris can be safely charged just in 1 hour. Extreme life span: 2000 to 3000 charging cycles.  Support for the orginial accessories: Original 12V, 24V chargers can be used.

Do you want to try LiFePO4 in the Electric Wheelchairs? Please contact us for special quote to support people with special medical needs.

19.01.2010
 
Photo of battery delivery

It is here again…. another cargo of the LiFeYPO4 batteries just arrived!

16.12.2009
 
FAQ - Frequently Asked Questions

FAQ - Frequently Asked Questions

What is the 4.25 Volt level for LFP cells?

It is the maximal charging level. When charging the voltage per cell must be limited to 4.25V and bellow. If the voltage exceeds 4.25V, the cell is getting internally damaged and the life span is shortened.

What is the 3.2 Volt level for LFP cells?

It is the nominal discharge voltage.  Please see the discharge voltage diagram. During the discharge the nominal voltage is 3.2V.

What is the 2.5 Volt level for LFP cells?

It is the minimal discharge voltage.  During discharge, the battery voltage must not drop bellow this level. When the voltage goes down to 2.5V the discharge must be stopped. If the voltage goes bellow 2.5V, the cell is getting internally damaged and the life span is shortened.

   ...more >>

29.11.2009
 
FAQ - Frequently Asked Questions

FAQ - Frequently Asked Questions

Question: How is the LiFeYPO4 cells production and testing done to guarantee that 100% of the cells fulfill the quality standards?
 
Answer: The TS LiFeYPO4  (LFYP) cells (3.2V) and batteries  (12V) are made by the ThunderSky battery group in China (the TS.Group). The TS.Group has been making the batteries for more than 10 years.  This is longer than any other LiFePO4 battery producer. That is why the production quality and manufacturing experience is much, much higher that some companies who just start the battery business.  Yes, there were some problems in the past, but this is now long gone. The TS.Group learned its mistakes, and now knows how to make the high-quality cells. This makes the basis for 100% quality.
 
The TS.Group has been producing hundreds of thousands of Ah cells every week in several factories and several more new factories are going to be opened. The LiFeYPO4 cell and battery production is a highly industrial technology process. All production processes are under a strict inspection. If there is any failure during the production, this will influence the whole production batch, not just one or few batteries. In such situation, the whole production batch is discarded and will not be processed for final product. This is another reason for 100% quality.
 
During the production, the raw materials, the production of the cell sheets, cell assembly and   ...more >>

14.11.2009
 
EU VAT Number

EU VAT Number

If you have a valid EU VAT number, you do not have to pay the VAT when buying from GWL/Group.  You need however to report the purchase of the goods in your VAT purchase reports.

Please see details concerning the VAT in this diagram.

Please check the validity of your EU VAT number in the VIES database.

Any questions? Do not hesitate to ask!

01.11.2009
 
Electric Vehicle Technical Report 2009/10/09

Electric Vehicle Technical Report 2009/10/09

Please download the GWL/Power Group Electric Vehicle Technical Report 2009/10/09.

16.09.2009
 
standard and wholesale pricing

 

Please contact us for the standard and wholesale pricing for the lithium yttrium iron phosphate cells and batteries. We can offer the best volume pricing for your energy solutions and projects. The best price starts at USD $1.0xx per Ah. (or EUR 0.7xx per Ah). Please send email to us to get the quote.

16.09.2009
 
The shiping price-list for Europe

 

The shiping price-list for Europe

Logistics in Europe. Fast delivery by TNT. Please see our logistic price-list for shipping of the cargo within EU. The cargo shipping price list in EUR.  For the shipping and delivery outside Europe, please contact us for for the terms, pricing and conditions.

Please visit EV-POWER.EU web site to make the order!

16.09.2009
 
Winston in grocery store?

Shopping at Tesco?  You cannot get these at your Tesco, Lidl or Wallmart… But you get your LFP cells and batteries from GWL/Power. Please contact us for the order and delivery terms.

06.09.2009
 
TS-LFP9000AHB for Submarine application

Thunder-Sky Submarine Battery
TS-LFP9000AHB
Submarine Batteries

TS-LFP9000AHB - the LiFeYPO4 battery submarine model. Especially designed to replace other battery technologies. The lithium yttrium design gives the best performance and safety for military applications.

05.09.2009
 
Yttrium

 

Yttrium is found in most rare earth minerals, as well as some uranium ores, but is never found in nature as a free element. About 31 ppm (parts per million) of the Earth’s crust is yttrium making it the 28th most abundant element there, and 400 times more common than silver.

Yttrium has no known biological role, though it is found in most, if not all, organisms and tends to concentrate in the liver, kidney, spleen, lungs, and bones of humans.

Annual world production of yttrium oxide had reached 600 tonnes by 2001, with reserves estimated at 9 million tonnes. Only a few tonnes of yttrium metal are produced each year.  Wikipedia


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