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. 12, 2016
Filed:
Feb. 02, 2013
Mitsumi Electric Co., Ltd., Tokyo, JP;
Shogo Nagata, Tokyo, JP;
Yasuaki So, Kodaira, JP;
Takeshi Yamaguchi, Fuchu, JP;
Norihito Kawaguchi, Akishima, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A secondary-battery monitoring device capable of realizing highly reliable overcurrent detection and a battery pack having it are provided. When an overcurrent flowing to a secondary battery is to be detected by utilizing a current detection voltage generated via on-resistance of a discharge-control switch and a charge-control switch, a voltage correction circuit that generates a correction voltage having a characteristic varied by positive slope or negative slope along with increase in a power supply voltage is provided, and the correction voltage is added to the detection voltage or a reference power supply voltage with the polarity that cancels out the slope of voltage variation caused in the detection voltage, and then the voltage is input to a comparator circuit. In this manner, variation in the overcurrent determination current is reduced.