Blog - Chargers and charging

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

21.06.2019
 
Charge assembly and balance the battery pack

Quick instruction video how to install the BMS123 Smart with the LFP (LYP) cells. Learn and see for yourself - simple and quick installation in just a few steps. See how to assemble the pack from 4 cells.

About Winston cells: Large capacity LiFePO4 prismatic cells. Thundersky – Winston Battery famous yellow cells. More than 18 years on the market. Thousands of satisfied customers. Easy assembly using the large screw terminals.

Performance 10000 cycles. Warranty 10 years. Life-span 30 years. Simple. Safe. Secure.

About BMS123 Smart: The innovative BMS solution to monitor and manage the lithium cells. Especially suitable for large prismatic cells. Easy and quick monitoring using an software-app for your mobile phone or tablet. Easy. Smart. Reliable.

About GWL: GWL/Power is the European distributor for Thundersky - Winston Battery cells. Quick delivery for the cells to all of Europe and also around the world. GWL/Power provides support and solutions for DC power systems. Large warehouse in the center of Europe. Fast shipping in 2 to 3 days.

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10.06.2019
 
SLA vs. LiFePo4 (LFP) battery, extreme discharge test

What is the difference between SLA and Lithium Iron Phosphate (LiFePO4, LFP)? One of the most frequent questions now answered. Rather extreme discharge test of two SLA and Winston 12V battery.

About Winston batteries: Large capacity LiFePO4 prismatic cells and batteries. Thundersky – Winston Battery famous yellow cells. More than 18 years on the market. Thousands of satisfied customers. Easy assembly using the large screw terminals. Performance 10000 cycles. Warranty 10 years. Life-span 30 years. Simple. Safe. Secure.

About GWL: GWL/Power is the European distributor for Thundersky - Winston Battery cells. Quick delivery for the cells to all of Europe and also around the world. GWL/Power provides support and solutions for DC power systems. Large warehouse in the center of Europe. Fast shipping in 2 to 3 days.

Links and References

Winston batteries:


https://www.ev-power.eu/LiFeYPO4-batt...
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16.02.2018
 
3.2V LFP cell initial charging

Question: How should new cells 3.2V 40AH,60AH, 90AH, 100 AH, etc. be formed before first usage?

Answer:The new 3.2V LFPcells delivered from the warehouse are partially charged. Howeverbefore the first use, it is essentialto charge each cell to full capacity. The initial charging should be done with the charging current set to less than 1C (typically 0.5C), till the voltage level of 4.0 V is reached.

There is no other need for LFP 3.2V cells to be formatted or otherwise specially prepared for the use. After the first charge to full, the cell is ready to be used for use.

The above charging rule is also applied to the initial charge after the cell has beenunused or stored for a long time. If not used more than 1 month, it is recommended to make again an initial charge to full.

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16.02.2018
 
12V LP battery balancing and charging

Question: Can I charge the 12V LFP battery using a conventional auto-moto charger 12V?

Answer: With most of “cheap” car battery chargers you**cannot**charge the 12V LFP battery. Cheap chargers often end charging at 14V. As a result the LFP batteries are not charged sufficiently. In order to charge to full you need to reach above 16V.

If you have an “advanced” manageable charger, it can be used provided you can set the charge level to at least 16V.

Simply said: you can charge with any kind of charger if you make sure that the battery voltagereaches at least 16V, but does not exceed themaximum limit of 17V.

Question: What are the experiences of balancing 12V batteries, when, for example, four pieces of 12V/40Ah in the series?

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16.02.2018
 
You must charge the LiFePO4 before the first use!

Blog EVPower

You must charge before the first use!

We remind all users of the LFP cells and LP batteries that the cells and batteriesMUST be chargedto full voltage levelBEFOREassembling into a pack and before starting to be used.

For the 3.2V cells, the full charge voltage level is 4.00V and the charging is. For the 12V LP batteries the full charge voltage level is 16.00V. More details about.


described here
the use of 12V batteries is here
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16.02.2018
 
Charging individual cells using the regulated (laboratory) power supply

Blog EVPower

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 chargingand 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 isa time to stop chargingand disconnecting the charger.

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16.02.2018
 
Initial charging FAQ

Blog EVPower

Check these FAQ published on our blog to understand the initial battery charging

We remind all users of the LFP cells and LP batteries that the cells and batteriesMUST be chargedto full voltage levelBEFOREassembling into a pack and before starting to be used.

The new 3.2V LFPcells delivered from the warehouse are partially charged. Howeverbefore the first use, it is essentialto charge each cell to full capacity.


source
source
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16.02.2018
 
Initial charge voltage levels of LiFePO4

Blog EVPower

Initial charge voltage levels

Question:I wish to equip my workshop with the proper tools. Can you offer me following chargers: one model with cut off voltageat 3.65V, one model with cut off voltageat 3.80Vand one model with cut off voltageat 4.00V?

Answer:There is no need to have so many different chargers. The typical chargers that are. Please see some additional comments.


sold by GWL charge to 3.65V (for single cell)
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09.02.2018
 
Sudden battery discharge

Blog EVPower

FAQ: “Sudden” battery discharge

I have bought a several of LFP cells and made the pack with them to replace the lead-acid battery in my houseboat. The LFP battery was working great and it gives much more capacity than the lead acid. However after several weeks of usage, I came back after the weekend and I found out that the battery is completely discharged. Why this happen?

Please note that unlike the lead acid batteries, the LFP batteries will be completely damaged if youdischarge them bellow the minimal voltage(usually >2.5V per cell, or bellow 10V for 12V battery). This may happen if you have some equipment that takes the power from the battery continually. Maybe you simply forget some light or some equipment „on“, and after few days the battery is deeply discharged and damaged forever.

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09.02.2018
 
LFP as starting battery

Blog EVPower

LFP as a starting battery – two concerns

Question: I want to use the LFP battery (4x 3.2V cells) for starting of my car. What SBM should I use to protect the battery?

You cannot use a SBM to protect the starting battery. For starting the car, the current will be very high,hundreds or even nearly 1000 Amps, it is not possible to disconnect such high currents.

WARNING:Additionally it is not possible to disconnect the battery from vehicle circuits. The car electronics may burn or become faulty of the battery is suddenly removed from the circuit, as a result of disconnection, during the operation (when the engine is running).

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