Ground fault detection circuit and ground fault detection apparatus
US8797042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2012 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Jul 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.