John in CR
100 TW
I picked up a variety of these boards thinking they were BMS's, but what they do is constantly balance the pack at up to 50mA of current between series cells. There's no cell level HVC or LVC, so it doesn't carry any of the power or cut anything off. It just brings the cells all toward equal, and since it does so at any cell voltage the same PCB works for Lipo or LiFePo4 whether you charge to 4.10V or 4.15V or 4.20V it doesn't care.
I haven't heard of these things before, and I was wondering if anyone has seen or used them. I understand that they are used on some of the Chinese ebikes with the safe chemistries, so the bulk charger acts as the pack HVC and the controller as the pack LVC with a balancing PCB preventing the pack from getting out of whack until a cell dies.
I haven't heard of these things before, and I was wondering if anyone has seen or used them. I understand that they are used on some of the Chinese ebikes with the safe chemistries, so the bulk charger acts as the pack HVC and the controller as the pack LVC with a balancing PCB preventing the pack from getting out of whack until a cell dies.