Vehicle power supply device and its degradation judgment method

Details Vehicle power supply device and its degradation judgment method Vehicle power supply device and its degradation judgment method

2006-07-21

2010-06-22

Tsai, Carol S (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S057000, C320S137000, C320S166000, C320S150000, C324S430000

Reexamination Certificate

active

07742885

ABSTRACT:
A vehicle power supply device has a capacitor unit including capacitors storing auxiliary power; a temperature sensor; a charge circuit; a capacitor-unit current detector; a capacitor-unit voltage detector; a controller; a storage; and a determination unit. The determination unit determines the degradation level of the capacitor unit based on at least one of an internal resistance standard value and a corrected calculated value of capacitance. This structure determines degradation of the vehicle power supply device more accurately than ever, so that the device can be used until the end of the actual life.

REFERENCES:
patent: 2002/0085397 (2002-07-01), Suzui et al.
patent: 2005-028908 (2005-02-01), None
International Search Report for Application No. PCT/JP2006/314449 dated Aug. 22, 2006.

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