Title:
RELAY WELD DIAGNOSTIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/145562
Kind Code:
A1
Abstract:
The present invention is a relay weld diagnostic device for diagnosing whether a relay is welded, without the use of a voltage detection circuit. In this device, a threshold value determination unit (104) determines a threshold value on the basis of a resistance value that is set for each of a P-pole-side resistor (24) and an N-pole-side resistor (23) provided to charging equipment. A peak value measuring unit (110) measures the peak value of a voltage supplied to a voltage line by an alternating-current signal output circuit (112). A comparison diagnosis unit (111) assesses the state of a relay (14) on the P-pole side and a relay (15) on the N-pole side by comparing the peak value and the threshold value, and makes a diagnosis as to whether the relays (14), (15) are welded on the basis of the assessed state of the relays (14), (15) and the state in which the relays (14), (15) are controlled.
Inventors:
IISAKA ATSUSHI
Application Number:
PCT/JP2013/001311
Publication Date:
October 03, 2013
Filing Date:
March 04, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
H02H7/00; B60L3/00; B60L11/18; G01R31/02; H02J7/00
Foreign References:
| JP2011185812A | 2011-09-22 | |||
| JP2010238576A | 2010-10-21 | |||
| JP2010239827A | 2010-10-21 | |||
| JP2011160604A | 2011-08-18 | |||
| JP2010239827A | 2010-10-21 | |||
| JPH0870503A | 1996-03-12 |
Other References:
See also references of EP 2833498A4
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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