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:
May. 31, 2011
Filed:
Apr. 17, 2007
Akihiko Kudo, Ibaraki, JP;
Masaki Nagaoka, Saitama, JP;
Akihiko Emori, Ibaraki, JP;
Takahiro Kawata, Ibaraki, JP;
Akihiko Kudo, Ibaraki, JP;
Masaki Nagaoka, Saitama, JP;
Akihiko Emori, Ibaraki, JP;
Takahiro Kawata, Ibaraki, JP;
Hitachi Vehicle Energy, Ltd., Ibaraki, JP;
Abstract
The present invention provides an assembled battery total voltage detection and leak detection apparatus which is reduced in size and is reduced in manufacturing costs. Detection of a total voltage is performed at a measurement time of a total voltage of an assembled batteryby connecting an output of a positive electrode resistance voltage dividing circuit composed of resistorsandto + input of a differential amplifierand connecting an output of a negative electrode resistance voltage dividing circuit composed of resistorsandto − input of the amplifier, and it performs leak detection at a leak detection time by connecting an output of a positive electrode resistance voltage dividing circuit to + input of the amplifierand connecting + input of the amplifierto the minus input of the differential amplifierto measure an output voltage of the amplifier. The total voltage detection and the leak detection can be performed without requiring an insulation type voltage sensor, an insulation power source, photo-couplers, or the like.