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:
Apr. 24, 2001
Filed:
Aug. 09, 2000
Iichiro Mori, Itami, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A control circuit detects the battery voltage E,of the rechargeable battery, and the terminal voltage E,across the input/output terminals that are connected to the rechargeable battery through a charge/discharge circuit. When the battery voltage E,is lower than a charge-prohibiting voltage and higher than a discharge-prohibiting voltage, the control circuit turns on the first and second FETS, which are connected in series to the charge/discharge circuit. When the battery voltage E,is higher than the charge-prohibiting voltage, the first FET is turned off, and when the battery voltage is higher than the terminal voltage, the first FET is turned on. When the battery voltage E,is lower than the discharge-prohibiting voltage, the second FET is turned off, and when the battery voltage E,is higher than the terminal voltage E,the second FET is turned on.