Title:
GROUND FAULT DETECTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/103613
Kind Code:
A1
Abstract:
A ground fault detecting device (121) switches a switch (251), in an insulation resistance varying unit (250), from a disconnected state to a conducting state when the potential of a positive electrode connecting line (160), which conducts between a battery module (112) and a load by relays (150, 151), fluctuates. Thus, the insulation resistance of the positive electrode connecting line (160) is reduced, and the charging or discharging of a coupling capacitor (220), according to the potential fluctuation of the positive electrode connecting line (160), is performed via a resistor (252) having a resistance value (Rq) lower than insulation resistances (202, 212). By virtue of the ground fault detecting device (121), ground fault detection can be restarted quickly after ground fault detection is stopped by potential fluctuation occurring in the connecting line between the battery module (112) and the load.
Inventors:
KATO SHINYA (JP)
MACHIDA AKIHIRO (JP)
YAMAUCHI TATSUMI (JP)
MACHIDA AKIHIRO (JP)
YAMAUCHI TATSUMI (JP)
Application Number:
PCT/JP2013/082123
Publication Date:
July 03, 2014
Filing Date:
November 29, 2013
Export Citation:
Assignee:
HITACHI VEHICLE ENERGY LTD (JP)
International Classes:
G01R31/02; B60L3/00
Foreign References:
| JP2012168070A | 2012-09-06 | |||
| JP2010181368A | 2010-08-19 | |||
| JP2006170714A | 2006-06-29 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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