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:
Feb. 26, 2013
Filed:
Jun. 30, 2009
Tomitaro Hara, Okazaki, JP;
Akira Tsujiko, Miyoshi, JP;
Takuichi Arai, Toyota, JP;
Tsuyoshi Yano, Toyota, JP;
Daisuke Teramoto, Toyota, JP;
Sachie Yuasa, Okazaki, JP;
Keiko Wasada, Toyota, JP;
Tomitaro Hara, Okazaki, JP;
Akira Tsujiko, Miyoshi, JP;
Takuichi Arai, Toyota, JP;
Tsuyoshi Yano, Toyota, JP;
Daisuke Teramoto, Toyota, JP;
Sachie Yuasa, Okazaki, JP;
Keiko Wasada, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A control method for a lithium ion secondary battery includes performing a charging step of charging the lithium ion secondary battery with a predetermined quantity of electricity when the battery voltage of the lithium ion secondary battery has decreased to a lower limit battery voltage that is set at a value that falls within a range higher than (B−C) V and lower than or equal to (B−C+0.2) V where a maximum value of a positive electrode potential of a flat portion in a discharge positive electrode potential curve is B (V) and a negative electrode dissolution potential is C (V). It is possible to suppress a dissolution of a negative electrode current collector of the lithium ion secondary battery to prevent the service life of the lithium ion secondary battery from shortening because of an internal short circuit.