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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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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.

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.

07.07.2012
 
Depth of discharge (DOD)

Depth of discharge (DOD)

All battery manufacturers recommend to keep the Depth of Discharge (DOD) bellow the maximal limit of 100%. Ideally 80% DOD or less is recommended. The rule is quite simple: the smaller DOD the larger number of cycles. With 50% DOD the LiFePO4 cells may have well above 5000 cycles. However it is imporatnt to keep the DOD at the cetral part of the capacity range. If the DOD is not in the center of the capacity range, the cell performace may degrade faster.

As a matter of fact, since it is better to avoid deep cycle discharging, it seems to be better to charge as frequently as possible. It is better to “charge (to full) and drive” rather than “drive and charge (from null)”.  

29.06.2012
 
Building a LiFePO4 battery - charging and initiation

Building a LiFePO4 battery - charging and initiation

Check a useful article published by one of our customers.

14.11.2011
 
RT-BMS Cell Balancing Module dimensions and mounting specifications

 

RT-BMS Cell Balancing Module dimensions and mounting specifications

The drawings show the CBU sizes and installation.

05.11.2011
 
FAQ: Charging individual cells using the regulated (laboratory) power supply

 

FAQ: Charging individual cells using the regulated (laboratory) power supply

Many of the laboratory power supplies allow charging of the individual cells. Using such a regulated power supply is a suitable method for performing the initial charging or for the balancing of a single cell in a battery pack (by means of charging to a fixed voltage level).

There are usually 3 steps to follow:  1) set the target voltage (open voltage) – without the connection of the battery (3.65 at the picture), 2) start charging and set the current to be used (3.0 A at the picture), 3) when the charger reaches the target voltage – it usually starts to reduce the charging current until a low value. (3.66 V reached at 0.04A). It is a time to stop charging and disconnecting the charger.

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 >>

10.07.2011
 
The application of the Cell Ballancing Module

The application of the Cell Ballancing Module

16 CBM units are used to balance the final stage of the charging of the EV scooter GWL/Scooty. The 16 lithium cells make the total of 48V (nominal voltage). Each cell using one CBM for balancing.

30.05.2011
 
Installing 6 Akumons to monitor up to 6 pcs of 12V LP packs

Installing 6 Akumons to monitor up to 6 pcs of 12V LP packs

This is a photo from our customer showing an installation of 6 pcs of Akumon management boards together with a service battery and relay. This installation is designed to monitor up to 6 pcs of 12V LP block batteries.

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.

04.05.2011
 
Cell Balancing Module (CBM) - easy installation

Cell Balancing Module (CBM) - easy installation

The photo shows a four-cell testing pack with CBM installed. On the right there is a single CBM - balancing up to 1.7A. On the left, there is a cascade of 3 CBMs that increase the balacing current to up to 5A (3x ~1.7A).

14.03.2011
 
High speed balancing with high currents using Akumons

High speed balancing with high currents using Akumons

A simple solution using the automotive 12V relay and the 12V halogen bulbs. 

07.03.2011
 
Simple solution to make a 24V battery pack

Two 12V 60Ah batteries
Handle to carry the pack
Fuse and Akumons inside

Simple solution to make a 24V battery pack

Two 12V batteries (here 12V 60A) are packed together. A plastic handle is mounted too, to allow easy carrying of the pack.

A high power fuse (400A) and two Akumons are mounted inside a plastic box.

05.03.2011
 
Another installation diagram for the off-grid solutions

Another installation diagram for the off-grid solutions

05.03.2011
 
Using the LiFePO4 batteries for off-grid solutions

Using the LiFePO4 batteries for off-grid solutions

Combining the "easy to get components" to build off-grid solutions: solar chargers (charge controllers), wind-turbine invertors, UPS…..

To get a reliable and highly efficient energy storage the LFP batteries are used.

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.

23.02.2011
 
RT-BMS CAN Bus definition

RT-BMS CAN Bus definition

Following datagrams are sent by the RT-BMS master over the CAN bus at speed of 250 kb/s. The CAN module uses the version 2.0 of the protocol.

Address : 0x14A10101

D0 : Battery pack total capacity (0 .. 100 %)
D1 : Current  (-127 … +126, value * 5 = current [A])
D2 : Total voltage (low byte)
D3 : Total voltage (high byte)  - range 0 … 65535, value / 10 = voltage [V]
D4 : Highest temperature on the cells (-127 … +126 deg. C.)
D5 : Bit 0 - reading, Bit 1 - waiting, Bit 2 - balanicing , Bit 3 - running, Bit 4 - low voltage, Bit 5 - error (not serious), Bit 6 - error (serious)
D6 : The address of the CBU causing last error.
D7 : Internal error code (only for service purposes)

Address : 0x14A10102

D0 : Lowest voltage of the cell (low byte)
D1 : Lowest voltage of the cell (high byte) - range 0-65535, value / 100 = voltage [V]
D2 : The address of the cell with the lowest voltage
D3 : Highest voltage of the cell (low byte)
D4 : Highest voltage of the cell (high byte) - range 0-65535, value / 100 = voltage [V]
D5 : The address of the cell with the highest voltage
D6 : Lowest temperature on the cells (-127 … +126 deg. C.)
D7 : Reserved

   ...more >>

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

14.02.2011
 
Installation diagram for a battery pack based on the 12V monolithic LP batteries

 

Installation diagram for a battery pack based on the 12V monolithic LP batteries

This diagram give details on how to install the battery pack using the 12V monolithic LP batteries. This solution is especially suitable for small systems like EV boats operating at 24V (2 batteries), 48V (4 batteries) or EV cars (with 6 and more batteries).  Download  the PDF file with the installation.

The management of the battery pack is done by means of the AKUMON AKM-A1.  The low discharge warning can be optionally given by the BM1 - battery monitor connected to each 12V battery.  The voltage of each battery is provided by means of the APM1 - Battery Indicator.

   ...more >>

08.01.2010
 
Simple Hand Drawing - The Serial Connection

Simple Hand Drawing - The Serial Connection

This is a serial connection, using the 12V LFP battery blocks.

15.11.2009
 
The RT-BMS System Components Installation Diagram

The RT-BMS System Components Installation Diagram

The RT-BMS is designed according to the concept of single real-time balancers managing and balancing up to 192 individual cells. The individual cell-balancing units are controlled by the central Master RT-BMS Control Unit.


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