A typical LFP or LiFePO4 cell has 3.2V nominal voltage which means that if you connect 4 LFP cells in series you’ll have a 12.8V battery pack. The charge end voltage for a 4S pack would be 4 × 3.65V= 14.6V but as you know battery packs need to be balanced to serve for a long time, especially if the cells have different internal resistance. HX-JH-004 is a balancer board for a 4S LFP battery pack which should not be confused with BMS – the latter also protects the battery pack from overcharging, overdischarging and going overcurrent. HX-JH-004 only does the balancing. Specifications of HX-JH-004 4S LFP balancer board ● Dimensions (LWH) : 26 ×20.5×2.4mm ● Balancing current for each cell : 58mA ● Balancing voltage for each cell : 3.60V (14.4V for the 4S Li FePO4 battery pack) So when a cell’s voltage goes above 3.60V the balancer shoud start discharging until it reaches the 3.60V limit. Let’s take a closer look at the components on the PCB. There are 4 cha
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