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Title:
EARTH FAULT DETECTING DEVICE, AND ELECTRICITY STORAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/074394
Kind Code:
A1
Abstract:
A capacitor (C1) is connected between an output terminal of an impedance element (R1) and an electricity storage unit (3) mounted in a vehicle and insulated from the vehicle chassis. An earth fault determining unit (13) determines that an earth fault has occurred if a detected value based on a peak-to-peak value of a connecting point voltage between the impedance element (R1) and the capacitor (C1) is equal to or less than a first reference value set on the basis of the peak-to-peak value of the connecting point voltage when an insulation resistance (R2) between the electricity storage unit (3) and the vehicle chassis is at the lowest allowable value thereof, and is equal to or greater than a second reference value set on the basis of the peak-to-peak value of the connecting point voltage when the electricity storage unit (3) and the vehicle chassis are completely earthed.

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Inventors:
MORIMOTO NAOHISA
Application Number:
PCT/JP2017/037305
Publication Date:
April 26, 2018
Filing Date:
October 16, 2017
Export Citation:
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Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G01R31/02; B60L3/00
Domestic Patent References:
WO2007026603A12007-03-08
Foreign References:
JP2007108074A2007-04-26
JP2015226343A2015-12-14
JP2015126572A2015-07-06
JP2007057490A2007-03-08
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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