Lithium Battery PCM
Lithium battery PCM(Protection Circuit Module) is charge-discharge protection for series connection lithium battery pack. It could assure the voltage difference between each battery cell is lower than certain value (as ±20mV), so each single battery cell in the battery pack could be balance charged, that improve the charge result on the method of series charge.
Meanwhile, PCM could monitor the over-voltage, low-voltage, over-current, short-circuit, over-heat status of each single battery cell in the battery pack.
Finished lithium battery pack is including lithium battery cell and PCM. The lithium battery cell is composing of positive pole plate, separator, negative pole plate, and electrolyte. Most people are familiar with the lithium battery composition and function, but rarely for the lithium battery PCM. Lithium battery PCM is mainly for protection for lithium battery, protect battery from over-discharge, over-charge, over-current, and there is also very important point is output short circuit protection.