Title:
POWER SUPPLY FOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2005/002927
Kind Code:
A1
Abstract:
A power supply for a vehicle comprising an electronic control section delivering information for controlling brake of the vehicle, and a battery supplying power to a brake through the electronic control section. An auxiliary power supply, i.e. a power supply backup unit, comprises a capacitor unit consisting of a plurality of capacitors, and a section for detecting abnormality of the capacitor unit to supply power to the brake when the battery is abnormal. The detecting section measures the internal resistance of the capacitor unit when it is charged or discharged, and measures its internal capacitance from the voltage variation rate per unit time. Based on the internal resistance and the internal capacitance, the detecting section makes a decision whether the capacitor unit is normal or not.
Inventors:
OHASHI TOSHIHIKO
MITANI YOSUKE
MITANI YOSUKE
Application Number:
PCT/JP2004/009686
Publication Date:
January 13, 2005
Filing Date:
July 01, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
OHASHI TOSHIHIKO
MITANI YOSUKE
OHASHI TOSHIHIKO
MITANI YOSUKE
International Classes:
B60L7/00; B60R16/023; B60R16/04; B60R16/033; B60T8/17; B60T13/74; B60T17/22; H02J7/00; H02J7/34; H02J9/06; B60R16/02; B60R16/03; H02J7/14; (IPC1-7): B60R16/02; G01R31/00; B60T17/18; H01G13/00; H02J9/06
Foreign References:
| JP2001114039A | 2001-04-24 | |||
| JP2002325377A | 2002-11-08 | |||
| JPH02175351A | 1990-07-06 | |||
| JPH0894684A | 1996-04-12 | |||
| JP2002151366A | 2002-05-24 | |||
| JPH05116571A | 1993-05-14 |
Other References:
See also references of EP 1529694A4
Attorney, Agent or Firm:
Iwahashi, Fumio c/o Matsushita Electric Industrial Co. Ltd. (1006, Oaza Kadoma, Kadoma-shi Osaka 01, JP)
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