Low power 12 v lithium battery premise of protecting circuit background and significanceDue to the 12 v lithium battery energy density is high, in the condition of overcharge, the battery temperature rise after the excess energy will then the electrolyte decomposition and produce gas, easy to make the internal pressure rise and the risk of spontaneous combustion or broken;On the other hand, in the condition of excessive discharge, caused by decomposition of electrolyte battery degradation characteristics and durability, reduce the number of rechargeable, shorten the battery lifeSo for the 12 v lithium battery of protection is very important, the 12 v lithium battery applications must have the battery protection chip, to prevent the battery overcharge, overdischarge and overcurrent.