US 12,253,566 B2
Method of evaluating power storage device, method of manufacturing power storage device, and test system
Kensaku Miyazawa, Toyota (JP); Shinichi Hamasaki, Nagakute (JP); Yuya Ishihara, Miyoshi (JP); and Tetsuya Kaneko, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Apr. 4, 2023, as Appl. No. 18/295,517.
Application 18/295,517 is a continuation of application No. 17/224,340, filed on Apr. 7, 2021, granted, now 11,650,260.
Application 17/224,340 is a continuation of application No. 16/900,232, filed on Jun. 12, 2020, granted, now 11,002,799, issued on May 11, 2021.
Application 16/900,232 is a continuation of application No. 16/197,571, filed on Nov. 21, 2018, granted, now 10,725,119, issued on Jul. 28, 2020.
Claims priority of application No. 2017-229128 (JP), filed on Nov. 29, 2017.
Prior Publication US 2023/0236255 A1, Jul. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 31/385 (2019.01); G01R 31/3842 (2019.01); G01R 31/388 (2019.01); G01R 31/50 (2020.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H02J 7/00 (2006.01)
CPC G01R 31/3865 (2019.01) [G01R 31/3842 (2019.01); G01R 31/385 (2019.01); G01R 31/50 (2020.01); H01M 10/4285 (2013.01); H01M 10/44 (2013.01); H02J 7/0069 (2020.01); G01R 31/388 (2019.01)] 1 Claim
OG exemplary drawing
 
1. A method of evaluating a power storage device comprising:
(a) preparing a power storage device including an electrode assembly that includes a positive electrode and a negative electrode;
(b) adjusting a state of charge of the power storage device;
(c) selecting the positive electrode or the negative electrode as a reference electrode;
(d) performing an operation to insert a conductive rod-shaped member into the electrode assembly while a potential difference between the reference electrode and the rod-shaped member is measured after the state of charge is adjusted;
(e) stopping the rod-shaped member such that a short-circuiting stops at the short-circuiting between one layer of the positive electrode and one layer of the negative electrode by monitoring a variation of the potential difference; and
(f) evaluating the power storage device by monitoring a state of the power storage device after the short-circuiting.