- - SYSTEM FOR MONITORING GASES IN A BATTERY PACK ASSOCIATED METAL-ION ELECTROCHEMICAL ACCUMULATOR COMPRISING A TERMINAL-FORMING BUSHING FOR INCORPORATING A SAFETY VENT FOR THE MONITORING SYSTEM

摘要

The present invention relates to a system for monitoring gas in a battery pack, capable of reinforcing safety of the battery pack. According to the present invention, the system comprises: a battery pack (P) including a metal-ion electrochemical accumulator (A1-A4); and a heat-transfer liquid circuit (C1 and/or C2) including an expansion vessel (90), which is suitable for detecting and collecting the gas generated from each accumulator to circulate in a heat-transfer liquid, and cooling or heating the accumulator. Each metal-ion electrochemical accumulator comprises a rupture membrane (67) permeable to the gas and non-permeable to the heat-transfer liquid. The membrane is disposed and fixed in the accumulator to allow the gas generated by the accumulator to flow out therethrough.