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:
Jun. 11, 2013
Filed:
Mar. 25, 2010
Tadao Senriuchi, Tokyo, JP;
Masahiko Hirokawa, Tokyo, JP;
Takumi Sakamoto, Tokyo, JP;
Hiroshi Nakazawa, Tokyo, JP;
Noriyuki Hirao, Tokyo, JP;
Tadao Senriuchi, Tokyo, JP;
Masahiko Hirokawa, Tokyo, JP;
Takumi Sakamoto, Tokyo, JP;
Hiroshi Nakazawa, Tokyo, JP;
Noriyuki Hirao, Tokyo, JP;
TDK-Lambda Corporation, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A reusable period of a battery can be maintained for a long time by recharging while avoiding abnormal heating of the battery due to over discharge. A battery protection circuit comprises a control part that cuts off a discharge switch which is a discharge path to a load for a battery when a voltage value of the battery is equal to or less than a first threshold value, or when the voltage value of the battery is less than the first threshold value, wherein the control part cuts off a power switch as a power supply path to the control part itself when the voltage value of the battery is equal to or less than a second threshold value, or when the voltage value of the battery is less than the second threshold value which is lower than the first threshold value.