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:
Aug. 05, 2014
Filed:
Mar. 22, 2012
Takehito Ike, Moriguchi, JP;
Takayoshi Abe, Moriguchi, JP;
Tomomichi Nakai, Moriguchi, JP;
Takeshi Nakashima, Moriguchi, JP;
Kazuo Ishimoto, Moriguchi, JP;
Takehito Ike, Moriguchi, JP;
Takayoshi Abe, Moriguchi, JP;
Tomomichi Nakai, Moriguchi, JP;
Takeshi Nakashima, Moriguchi, JP;
Kazuo Ishimoto, Moriguchi, JP;
Sanyo Electric Co., Ltd., , JP;
Abstract
A ground fault detection circuit includes: a first switch circuit that connects/disconnects a first path between a positive bus bar and a ground potential section, the positive bus bar being connected to positive electrodes of secondary battery units through a field-effect transistor including a parasitic diode; a second switch circuit that connects/disconnects a second path between a negative bus bar and a ground potential section, the negative bus bar being connected to negative electrodes of the secondary battery units; and a ground fault detection unit that detects a ground fault of the positive bus bar or the negative bus bar based on an electric current flowing through the first path or the second path.