US 11,942,612 B2
Battery system
Hiroshi Fujikawa, Osaka (JP); Shinichi Yuasa, Kyoto (JP); Yoshito Kaga, Osaka (JP); and Keisuke Naito, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/254,289
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed May 8, 2019, PCT No. PCT/JP2019/018319
§ 371(c)(1), (2) Date Dec. 20, 2020,
PCT Pub. No. WO2019/244489, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 2018-118770 (JP), filed on Jun. 22, 2018; and application No. 2018-118771 (JP), filed on Jun. 22, 2018.
Prior Publication US 2021/0273270 A1, Sep. 2, 2021
Int. Cl. H01M 10/44 (2006.01); B60L 50/60 (2019.01); B60L 53/00 (2019.01); B60L 58/12 (2019.01); B60L 58/26 (2019.01); H01M 10/48 (2006.01); H01M 10/613 (2014.01); H01M 10/625 (2014.01); H01M 10/633 (2014.01); H01M 10/643 (2014.01); H01M 10/647 (2014.01); H01M 10/6556 (2014.01); H01M 10/6568 (2014.01); H02J 7/00 (2006.01)
CPC H01M 10/443 (2013.01) [B60L 50/60 (2019.02); B60L 53/00 (2019.02); B60L 58/12 (2019.02); B60L 58/26 (2019.02); H01M 10/48 (2013.01); H01M 10/486 (2013.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/633 (2015.04); H01M 10/643 (2015.04); H01M 10/647 (2015.04); H01M 10/6556 (2015.04); H01M 10/6568 (2015.04); H02J 7/0013 (2013.01); H02J 7/0047 (2013.01); H01M 2220/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A battery system comprising:
a battery module that includes a plurality of cells;
a management unit that manages charging-discharging of the battery module and a temperature inside the battery module;
a cooling member that allows a cooling liquid to pass inside the cooling member and cools a part of the plurality of cells in the battery module;
a first temperature sensor that is placed on a surface of any one of the plurality of cells;
a second temperature sensor that measures an environmental temperature in the battery module or in a battery pack including the battery module; and
a third temperature sensor that measures a temperature of the cooling liquid,
wherein:
the management unit estimates a maximum temperature of an inside of one of the cells in the battery module based on a temperature measured in the battery module, and controls, during charging-discharging of the battery module, at least one of (i) a charging-discharging current of the battery module and (ii) cooling of the battery module to prevent the estimated maximum temperature from exceeding an upper limit temperature, and
the management unit retains a table or a function that is created in advance and defines relationships between a plurality of conditions and the maximum temperature, the plurality of conditions including a measured temperature of a surface of one of the cells, an environmental temperature in the battery module or in the battery pack, and a temperature of the cooling liquid, and estimates the maximum temperature using the table or the function.