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.

Date of Patent:
Nov. 09, 1999

Filed:

Apr. 10, 1998
Applicant:
Inventors:

Kazunori Watanabe, Mooka, JP;

Kazuhiro Hara, Utsunomiya, JP;

Shinobu Ochiai, Utsunomiya, JP;

Taichi Ogawa, Utsunomiya, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
320150 ; 320137 ;
Abstract

A wasteful consumption of electric energy supplied to charge a battery is reduced when the battery is charged with a low charging efficiency due to a high battery temperature. The battery, typically comprising nickel-hydrogen secondary cells, is prevented from being deteriorated due to a high battery temperature after the battery is charged. While the battery is being charged, the battery is cooled by a battery cooling unit to prevent the charging efficiency from being lowered. If the battery temperature rises above a predetermined temperature, a contactor is opened to temporarily stop the charging of the battery, and the battery is cooled by the battery cooling unit. After the battery is charged, the battery is cooled if the battery temperature is high.


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