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. 12, 1993
Filed:
Sep. 25, 1991
Applicant:
Inventors:
Masaaki Yokokawa, Fukushima, JP;
Takayuki Aita, Fukushima, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 62 ; 320 36 ;
Abstract
Disclosed is a protective apparatus for a secondary battery comprising a temperature sensing switch turned on when the ambient temperature around the secondary battery exceeds a predetermined temperature setting, and a discharging circuit electrically connected via the temperature sensing switch to the secondary battery, the discharging circuit acting to discharge that battery. The discharging circuit contains a voltage sensing switch turned on when the voltage applied to the discharging circuit exceeds a predetermined discharge starting voltage, and a discharging resistor serially connected to the voltage sensing switch.