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:
Sep. 12, 2000
Filed:
Nov. 13, 1998
Sony Corporation, Tokyo, JP;
Abstract
An over-charging voltage is supplied from a voltage detecting circuit 39 to a priority controlling circuit 46 and a switch circuit 43. A voltage detecting circuit 41 detects a terminal voltage of a secondary battery BT (namely, an over-charging voltage) and supplies the voltage to the switching circuit 43. A current that flows in a resistor 42 is supplied to a cumulating circuit 40 and the switch circuit 43. The cumulating circuit 40 adds a voltage received from the voltage detecting circuit 39 through the priority controlling circuit 46 and a current that flows in the resistor 42 and supplies the added result as a control signal to a charging portion PS. A temperature detecting circuit 44 detects the temperature of a battery pack BP. The detected result is supplied to the switch circuit 43 and a detected voltage switching circuit 45. The switch circuit 43 performs on/off operations corresponding to the received voltage, terminal voltage, current, and temperature. The detected voltage switching circuit 45 switches the voltage of the voltage detecting circuit 39 corresponding to the detected result of the temperature.