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:
Jan. 22, 2002
Filed:
Nov. 09, 2000
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
In a secondary battery protection circuit for protecting a secondary battery ( ), on discharging, a discharge switch off arrangement ( ) turns a discharge control switch (FET ) off when a battery voltage (Vcc) is lower than a predetermined overdischarge detection threshold voltage. A discharge switch on arrangement ( ) immediately turns the discharge control switch on when a charger ( ) for a load ( ) is connected between external connection terminals ( ). On charging, a charge switch off arrangement ( ) turns a charge control switch (FET ) off when the battery voltage is higher than a predetermined overcharge detection threshold voltage. A charge switch on arrangement ( A, B, A, ) immediately turns the charge control switch on when the load for the charger is connected between the external connection terminals.