The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2022
Filed:
Jul. 31, 2017
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Masanari Oda, Tokyo, JP;
Shuichi Suzuki, Tokyo, JP;
Shigeki Makino, Tokyo, JP;
Takenori Ishizu, Hitachinaka, JP;
Ryohhei Nakao, Hitachinaka, JP;
Vehicle Energy Japan Inc., Hitachinaka, JP;
Abstract
The life of a secondary battery has not been able to be prolonged due to deterioration of the secondary battery. In one step, whether a difference between an average value of a negative electrode capacity deviations calculated in a different step and a negative electrode capacity deviation calculated in another step is larger than a predetermined value is determined. In a case where the average value of the measured negative electrode capacity deviations is larger than the ideal negative electrode capacity deviation, and deterioration of the negative electrode capacity deviation is proceeding, a secondary battery is controlled to operate at a high voltage in a further step. With the control, the deterioration of the negative electrode capacity deviation is suppressed and the life of the secondary battery is prolonged.