US 12,438,202 B2
Electric storage device, electric vehicle, and electric power system
Fumihito Komakine, Kyoto (JP); Yosuke Yamada, Kyoto (JP); Shinichi Uesaka, Kyoto (JP); and Atsushi Ozawa, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed on Sep. 23, 2022, as Appl. No. 17/951,400.
Application 17/951,400 is a continuation of application No. PCT/JP2021/011869, filed on Mar. 23, 2021.
Claims priority of application No. 2020-055295 (JP), filed on Mar. 26, 2020.
Prior Publication US 2023/0019114 A1, Jan. 19, 2023
Int. Cl. H01M 10/42 (2006.01); G01R 31/36 (2020.01); G01R 31/385 (2019.01); H01M 10/633 (2014.01)
CPC H01M 10/425 (2013.01) [G01R 31/3648 (2013.01); G01R 31/385 (2019.01); H01M 10/633 (2015.04); H01M 2010/4271 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric storage device comprising:
an electric storage unit;
a temperature measurement unit that detects a temperature of the electric storage unit;
a current measurement unit that measures a charge/discharge current of the electric storage unit; and
a safety evaluation unit that calculates a safety evaluation value of the electric storage unit,
wherein the safety evaluation unit determines a temperature range to which the temperature detected by the temperature measurement unit belongs among multiple temperature ranges, and calculates a safety evaluation value, based on the temperature range as a result of the determination and an accumulated value of a value related to a charge/discharge time of the electric storage unit.