Power circuit device for vehicles and control method thereof
First Claim
1. A power circuit device for vehicles that controls a selective power supply to a power consumption device from an accumulator, the power circuit device comprising:
- a main conductive route that includes at least one relay switched between ON and OFF, and passes a current from the accumulator to the power consumption device, the main conductive route including an end half portion that connects the power consumption device and the relay; and
a grounding portion that grounds the end half portion when the relay is turned OFF, wherein;
the relay includes a first relay and a second relay connected in series between the accumulator and the power consumption device, andthe ground portion grounds the end half portion in the main conductive route closer to the power consumption device than the second relay when the second relay is turned OFF.
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Accused Products
Abstract
The power circuit device for vehicles is provided with a grounding portion for grounding portions closer to a power consumption device side than a relay of main conductive routes when the relays used for the main conductive routes extending from an accumulator of a vehicle to a fuel heating device, a catalyst heating device, an electric pump, or the like is turned OFF, so that a false power application is not executed even a short-circuit occurs in a part of a power circuit. Also, when two relays are arranged in series, the grounding portion is provided for the relay closer to the power consumption device in order to monitor a voltage level of the main conductive route and make it easy to detect a short-circuit or a disconnection occurrence.
19 Citations
18 Claims
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1. A power circuit device for vehicles that controls a selective power supply to a power consumption device from an accumulator, the power circuit device comprising:
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a main conductive route that includes at least one relay switched between ON and OFF, and passes a current from the accumulator to the power consumption device, the main conductive route including an end half portion that connects the power consumption device and the relay; and a grounding portion that grounds the end half portion when the relay is turned OFF, wherein; the relay includes a first relay and a second relay connected in series between the accumulator and the power consumption device, and the ground portion grounds the end half portion in the main conductive route closer to the power consumption device than the second relay when the second relay is turned OFF. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control method for a power circuit device for vehicles that controls a selective power supply from an accumulator to a power consumption device, the power circuit device comprising a main conductive route which includes at least one relay and passes a current from the accumulator to the power consumption device, the main conductive route including an end half portion that connects the power consumption device and the relay, the method comprising the step of:
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grounding the end half portion when the relay is turned OFF, wherein the relay comprises a first relay and a second relay on the main conductive route in series between the accumulator and the power consumption device, the second relay being closer than the first relay to the power consumption device, and the grounding step grounds the end half portion between the second relay and the power consumption device, when the second relay is turned OFF. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A power circuit device for vehicles that controls a selective power supply to a power consumption device from an accumulator, the power circuit device comprising:
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a main conductive route that includes at least one relay switched between ON and OFF, and passes a current from the accumulator to the power consumption device, the power consumption device being a heating device or an electric pump, the main conductive route including an end half portion that connects the power consumption device and the relay; and a grounding portion that grounds the end half portion when the relay is turned OFF.
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18. A control method for a power circuit device for vehicles that controls a selective power supply from an accumulator to a power consumption device, the power circuit device comprising a main conductive route which includes at least one relay and passes a current from the accumulator to the power consumption device, the main conductive route including an end half portion that connects the power consumption device and the relay, the method comprising the step of:
grounding the end half portion when the relay is turned OFF, wherein the power consumption device is a heating device or an electric pump.
Specification