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:
Dec. 10, 2013
Filed:
Feb. 08, 2011
Etsuko Nishimura, Hitachiota, JP;
Katsunori Nishimura, Hitachiota, JP;
Akihide Tanaka, Hitachinaka, JP;
Etsuko Nishimura, Hitachiota, JP;
Katsunori Nishimura, Hitachiota, JP;
Akihide Tanaka, Hitachinaka, JP;
Hitachi Vehicle Energy, Ltd., Hitachinaka-shi, JP;
Abstract
A lithium-ion secondary battery system is provided which can improve the cycle life and the storage property of a lithium-ion secondary battery and can decrease a discharge capacity which cannot be recharged. The lithium-ion secondary battery system includes a lithium-ion secondary battery having a cathode, an anode including carbon, and a non-aqueous electrolyte; a charge/discharge circuit for putting the lithium-ion secondary battery on charge according to a charge control parameter; and an arithmetic processing section for controlling the charge/discharge circuit. The arithmetic processing section obtains battery characteristics of the lithium-ion secondary battery, changes a value of the charge control parameter when the arithmetic processing section determines that the battery characteristics satisfies a condition for changing the charge control parameter, and restores the value of the charge control parameter to the value before the change when the charge for the lithium-ion secondary battery is finished.