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. 24, 2017
Filed:
Sep. 25, 2015
Ryota Kageyama, Tokyo, JP;
Tsutomu Yamauchi, Tokyo, JP;
Norihito Kawaguchi, Tokyo, JP;
Nobuhito Tanaka, Tokyo, JP;
Takashi Takeda, Tokyo, JP;
Yoshihiro Satake, Tokyo, JP;
Takeshi Yamaguchi, Tokyo, JP;
Koji Koshimizu, Tokyo, JP;
Ryota Kageyama, Tokyo, JP;
Tsutomu Yamauchi, Tokyo, JP;
Norihito Kawaguchi, Tokyo, JP;
Nobuhito Tanaka, Tokyo, JP;
Takashi Takeda, Tokyo, JP;
Yoshihiro Satake, Tokyo, JP;
Takeshi Yamaguchi, Tokyo, JP;
Koji Koshimizu, Tokyo, JP;
MITSUMI ELECTRIC CO., LTD., Tokyo, JP;
Abstract
There is provided a method of correcting an overcurrent detection voltage of a battery protection integrated circuit including a current path between a first terminal and a second terminal, one or more transistors for controlling current of a secondary battery, an overcurrent detection circuit and a control circuit. The method comprises the steps of: measuring a resistance value between the first terminal and the second terminal wherein the one or more transistors are turned on at a predetermined temperature; estimating resistance values between the first terminal and the second terminal at respective temperatures based on the measured resistance value; calculating adjusting data for canceling temperature dependency of charge or discharge current of the secondary battery based on the measured resistance value and the estimated resistance values, wherein a value of the charge or discharge current varies depending on temperature; correcting the overcurrent detection voltage based on the calculated adjusting data.