Protection of battery modules without increasing internal resistance, particularly applicable to Li-ion elements used in electric vehicle secondary generation

摘要

A battery module consists of six electrochemical elements (11, ..16 ) each having a pressure sensitive sensor which closes a corresponding contact (51,...56) when the element pressure exceeds a threshold. A relay coil (7) is then energized and the relay contact (9) short circuits the battery module and the module protection (3) which may consist of a fuse or alternatively a transistor or thirster