US 11,811,030 B2
Diagnostic device for secondary battery and recovery method for secondary battery
Ryo Kanada, Toyota (JP); Kenji Takahashi, Toyota (JP); and Mai Fujiwara, Handa (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Aug. 29, 2022, as Appl. No. 17/897,912.
Application 17/897,912 is a division of application No. 17/138,077, filed on Dec. 30, 2020.
Claims priority of application No. 2020-005875 (JP), filed on Jan. 17, 2020.
Prior Publication US 2022/0407128 A1, Dec. 22, 2022
Int. Cl. H01M 10/48 (2006.01); H01M 10/0525 (2010.01); H01M 4/133 (2010.01); G01R 31/382 (2019.01); H01M 10/0587 (2010.01); H01M 10/44 (2006.01); H01M 4/134 (2010.01)
CPC H01M 10/48 (2013.01) [G01R 31/382 (2019.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 10/0525 (2013.01); H01M 10/0587 (2013.01); H01M 10/44 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A recovery method for a secondary battery having a structure in which positive electrodes and negative electrodes are laminated, the recovery method comprising:
a first compression for compressing at least a part of the secondary battery;
a second compression for compressing the secondary battery by applying a load from an outside of the secondary battery when an amount of decrease in electrical resistance of the secondary battery by the first compression is greater than a predetermined value;
a determination for determining whether an increase in electrical resistance due to a distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery; and
a recovery for charging, while the load that compresses the secondary battery is applied to the secondary battery, the secondary battery in a discharged state in which a state-of-charge (SOC) of the secondary battery has become equal to or less than a predetermined SOC value while the secondary battery is compressed by the second compression, upon determining that the increase in electrical resistance due to the distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery.