Power supply control device and method of detecting...

Details Power supply control device and method of detecting... Power supply control device and method of detecting...

2011-06-21

2011-06-21

Fureman, Jared J (Department: 2836)

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

Reexamination Certificate

active

07964985

ABSTRACT:
When an ignition key is turn ON, an ECU drives a bidirectional DC/DC converter to charge a capacitor to a voltage Vth1. The ECU turns on a first relay only and diagnoses whether or not a second relay, which is off, is welded, based on a change in a voltage VL at that time. After the diagnosis on welding, the ECU turns on the second relay, and the capacitor is charged to a voltage level of a main power storage device.

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