This part is similar to the above existing chargers mentioned.īesides of the direct battery charger, there are also chargers that connect to low-speed vehicles or machinery. Charge in different scenarios AC to DC Charger However, many chargers do not clearly indicate the exact output voltage, only a simple 12V or 48V, etc… In this case, we will need a voltmeter to measure it.
#Battery status in series connection manual#
Third, check the charger if it is in good condition, and insulated.Ĭheck the manual or instructions to clarify the output voltage and max current. Try to turn off this function, or change to another charger without battery voltage detection, but charge the battery directly. So the charger will not charge this battery at all. The LiFePO4 battery’s voltage is detected as 0V after the discharge protection is triggered. Second, check if there is a battery voltage detection function. This function generally uses a high pulse surge current.Įxtreme large instant surge current will cause the LiFePO4 battery BMS to damage, or even the internal cells to inflation and damage, do not use it. Can my existing charger charge LiFePO4 batteries?īelow are a few easy steps to check if your existing charger can charge LiFePO4 batteries.įirst, check if there is a repair or desulfuration function. The best discharge range for LiFePO4 is 10%-90% SOC, and since the current cycle life of LiFePO4 cells reaches 6000 cycles, 5% SOC-95% is actually good enough. LiFePO4 batteries only require two stages of charge, including constant current charge and constant voltage charge, which is also called bulk charge and absorption charge. LiFePO4 battery does not need to be fully charged, so trickle charge and float charge are not necessary. Unlike lead-acid batteries, they need to be fully charged every day to keep the active material from sulfation. If the charger’s output is not adjustable, or not that accurate, 14.0V-14.6V is acceptable.įor different voltages of LiFePO4 battery packs or systems, please refer to the following table.Ĭharge Voltage Table of LiFePO4 Battery Packs So, a BMS with protection is always built-in lithium battery packs.įor the 12.8V MonoBlock Battery, the recommended charge voltage is 14.4V. Over-voltage can easily cause degradation of the battery cells and performance, inflation, and even damage.
Here we only talk about LiFePO4 battery cells. Please note, lithium battery has different types such as NMC, LiFePO4, and others. Note that the charge voltage cannot be higher than 3.65V, as lithium battery cells are sensitive to over voltage and over current. The nominal voltage of one single LiFePO4 battery cell is 3.2V, and the charge voltage range is 3.50-3.65V. If you want to learn more about LiFePO4 battery, or if you are a professional, please continue reading. If you are just looking for a simple, direct answer, please skip to the conclusion.
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