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:
Sep. 08, 2015
Filed:
Sep. 25, 2008
Kei Sakabe, Hitachi, JP;
Akihiko Emori, Hitachi, JP;
Akihiko Kudo, Hitachinaka, JP;
Kenji Kubo, Hitachi, JP;
Youhei Kawahara, Hitachi, JP;
Mutsumi Kikuchi, Mito, JP;
Tatsumi Yamauchi, Hitachiota, JP;
Kei Sakabe, Hitachi, JP;
Akihiko Emori, Hitachi, JP;
Akihiko Kudo, Hitachinaka, JP;
Kenji Kubo, Hitachi, JP;
Youhei Kawahara, Hitachi, JP;
Mutsumi Kikuchi, Mito, JP;
Tatsumi Yamauchi, Hitachiota, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
A vehicle power supply system comprises a battery module that includes a plurality of battery cells, battery cell control devices and a signal transmission path through which signals are transmitted. The battery cell control devices comprises a voltage measurement circuit that measures terminal voltages at the battery cells, an abnormality diagnosis circuit that diagnoses an abnormality in the battery cell control device, a timing control circuit that outputs a signal for instructing measurement phase and a signal for instructing diagnosis phase, and a communication circuit that outputs a signal indicating the terminal voltage and a signal based upon a diagnosis result by the abnormality diagnosis circuit.