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:
Feb. 04, 2020
Filed:
Apr. 09, 2013
Mitsubishi Electric Corporation, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A method and apparatus to reliably detect failure in a voltage sensor which detects battery voltage, without erroneous determination, is provided. A current sensor detects charge/discharge current of a battery. The method comprises calculating a charge/discharge current change amount based on the current detected by the current sensor. A voltage sensor detects voltage of the battery. The method also comprises calculating a voltage change amount based on the voltage detected by the voltage sensor. If the charge/discharge current change amount is equal to or greater than a predetermined value and the voltage change amount is smaller than a failure determination value, it is determined that the voltage sensor has failed.