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. 17, 1995
Filed:
Dec. 11, 1992
Katsutoshi Amano, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A battery charger for charging a secondary battery has an infrared radiation sensor for detecting the surface temperature of the secondary battery while the secondary battery is being charged. A charging control circuit stops charging the secondary battery, typically an Ni-MH battery, when the surface temperature detected by the infrared radiation sensor has reached a predetermined temperature. The battery charger also has a potential detector for detecting an electric potential of the secondary battery. The charging control circuit stops charging the secondary battery, typically an Ni--Cd battery, when the electric potential detected by the potential detector starts dropping after the battery has fully been charged.