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:
Oct. 14, 1997
Filed:
Feb. 10, 1995
Applicant:
Inventors:
Nobuhiro Takano, Hitachinaka, JP;
Shigeru Shinohara, Hitachinaka, JP;
Assignee:
Hitachi Koki Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
320 35 ; 320 39 ; 320 48 ;
Abstract
To discriminate that a rechargeable battery has reached an end of life, the maximum battery voltage detected during a preliminary charge time is compared with a predetermined reference voltage. When the comparison results indicate that the battery voltage is above the predetermined reference voltage, it is determined that the battery has reached the end of life.