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. 03, 2012
Filed:
Nov. 20, 2007
Norito Yamabe, Toyohashi, JP;
Kouta Togashi, Takatsuki, JP;
Norito Yamabe, Toyohashi, JP;
Kouta Togashi, Takatsuki, JP;
Panasonic EV Energy Co., Ltd., Kosai-shi, JP;
Abstract
An abnormality of a current sensor or a voltage sensor is detected. An abnormality detecting section reads out a charging/discharging current I of a secondary battery detected by the current sensor and a battery voltage V of the secondary battery, calculates an estimated battery voltage Vs on the basis of an electromotive force E and an internal resistance r of the secondary battery, and judges the current sensor to be abnormal if the difference between the battery voltage V and the estimated battery voltage Vs is greater than a predetermined threshold and the charging/discharging current I exceeds a predetermined allowable range, and judges the voltage sensor to be abnormal if the difference is greater than the predetermined threshold and the charging/discharging current I is within the predetermined allowable range.