The lithium battery protective plate is the series lithium battery pack the charge and discharge protection;On a full charge can ensure each monomer battery between the voltage difference is less than the set value (plus or minus 20 mv) commonly, realize each battery monomer battery charge, effectively improve the serial charging mode of charging effect;At the same time detection of every single battery in the battery pack, overvoltage, undervoltage, over current, short circuit, over temperature condition, protect and extend the service life of the battery;Under-voltage protection makes every single battery in discharge to avoid when using battery damaged because of over dischargeFinished products of lithium battery mainly has two parts, and protection of lithium battery core board, lithium battery core is mainly composed of positive plate, diaphragm, negative plate, electrolyte composition;Positive plate, diaphragm, negative plate coil or cascade, packing and infusion liquid electrolyte, after packaging made from batteries, lithium battery protection board a lot of people don't know, the effect of lithium battery protection board, just as its name implies is to protect lithium batteries, lithium battery protection board's role is to protect the battery but put, but filling, but flow, and the output short circuit protection.