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:
Jan. 26, 2016
Filed:
Apr. 23, 2010
Hiroshi Iwasawa, Hitachinaka, JP;
Akihiko Emori, Hitachi, JP;
Yutaka Kobayashi, Hitachinaka, JP;
Ko Takahashi, Tokyo, JP;
Akihiko Kanouda, Hitachinaka, JP;
Hiroshi Iwasawa, Hitachinaka, JP;
Akihiko Emori, Hitachi, JP;
Yutaka Kobayashi, Hitachinaka, JP;
Ko Takahashi, Tokyo, JP;
Akihiko Kanouda, Hitachinaka, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A battery pack includes a plurality of battery units mutually connected in parallel, each including a cell group in which one or two or more secondary cells are connected in series, and a first current control element that is connected in series with this cell group, a first control means that controls the charging/discharging current for each battery unit by controlling the operation of the first current control element included in each of the battery unit; a voltage measurement means that measures the voltage of the cell group or cells included in each of the battery unit, and a diagnosis means that diagnoses a deterioration level or a fault of each battery unit on the basis of the voltage of the cell group or cells measured by the voltage measurement means.