Lithium battery PCM and BMS

PCM or PCB ( protection circuit module or board ) is the "heart" of Lithium Battery pack.  It will protect Lithium Battery pack from overcharging, over-discharging and short-circuit, avoid Lithium Battery pack from explosion, fire and damage.

For low voltage lithium Battery Packs (<20 cells), you shall choose PCM with equilibrium function to keep each cell in balance and good service life. For high voltage Lithium Battery Pack (>20 cells), you shall consider advanced BMS ( battery manage system) to monitor each cell's performance to ensure battery's safer operation.