US 12,087,962 B2
Battery pack and power supply system
Keisuke Shimizu, Osaka (JP); Takeshi Nagao, Osaka (JP); and Goro Fujita, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/296,393
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Nov. 8, 2019, PCT No. PCT/JP2019/043915
§ 371(c)(1), (2) Date May 24, 2021,
PCT Pub. No. WO2020/116089, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-227159 (JP), filed on Dec. 4, 2018.
Prior Publication US 2022/0021071 A1, Jan. 20, 2022
Int. Cl. H01M 50/342 (2021.01); B60L 3/00 (2019.01); B60L 58/26 (2019.01); B60Q 9/00 (2006.01); H01M 10/48 (2006.01); H01M 10/613 (2014.01); H01M 10/625 (2014.01); H01M 10/633 (2014.01); H01M 10/6552 (2014.01); H01M 10/6563 (2014.01); H01M 10/6568 (2014.01); H01M 10/663 (2014.01)
CPC H01M 50/342 (2021.01) [B60L 3/0046 (2013.01); B60L 58/26 (2019.02); B60Q 9/00 (2013.01); H01M 10/48 (2013.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/633 (2015.04); H01M 10/6552 (2015.04); H01M 10/6563 (2015.04); H01M 10/6568 (2015.04); H01M 10/663 (2015.04); H01M 2220/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A power supply system comprising:
a battery pack having a substantially sealed structure, the battery pack comprising:
a battery module containing a plurality of battery cells each of the plurality of battery cells having a safety valve which opens in order to discharge an internal gas when an internal pressure rises; and
a pressure switch that is non-resettable and connected to a controller by a signal line, the pressure switch disposed within the battery pack and outside of the battery module; and
a pressure release mechanism to discharge gas from the battery pack, the pressure release mechanism disposed outside the battery pack and outside of the battery module,
wherein the pressure switch changes irreversibly from a normal state to a fault state after any of the safety valves opens and a pressure in the battery pack is greater than a predetermined pressure threshold value.