Title:
RELAY-WELDING DETECTION CIRCUIT AND POWER SUPPLYING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/132431
Kind Code:
A1
Abstract:
Provided is a relay-welding detection circuit that is configured to be high-impedance. The relay-welding detection circuit detects welding of relays (RYP, RYN) provided on a charging path from an external power supply (PW) to a first battery (14), and is provided with: a second battery (15) that can supply a welding-detection power supply independently of the external power supply (PW); a transistor switch (17) that is a circuit in which there is substantially zero current flowing in from the external power supply (PW) side of the relays, and that controls whether or not to supply the welding-detection power supply to the second battery (15) on the basis of the voltage at the external power supply (PW) side of the relays; and a control unit (18) that is electrically insulated from the transistor switch (17), and that detects welding of the relays (RYP, RYN) on the basis of whether or not the transistor switch (17) has supplied the welding-detection power supply.
Inventors:
TAZAKI SHINTARO
Application Number:
PCT/JP2012/002153
Publication Date:
October 04, 2012
Filing Date:
March 28, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
TAZAKI SHINTARO
TAZAKI SHINTARO
International Classes:
H01H47/00
Foreign References:
| JP2009100568A | 2009-05-07 | |||
| JPH05149978A | 1993-06-15 | |||
| JP2010252475A | 2010-11-04 | |||
| JP2002153086A | 2002-05-24 |
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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