Power supply control device for electric vehicle
First Claim
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1. A power supply control device for an electric vehicle, comprising:
- a voltage converter means connected through a main switch to a high-voltage battery;
a drive motor energized by the high-voltage battery;
a low-voltage battery and vehicle periphery equipment both connected to the voltage converter means for receiving a power supply;
a switch controlling means, connected to at least one of the voltage converter means and the low-voltage battery, for receiving a power supply and for controlling the opening and closing actions of the main switch; and
a means for supplementally supplying a backup power to the switch controlling means so that the switch controlling means is energized with enough power to ensure a normal operation of the switch controlling means,wherein said switch controlling means receives a sum of voltage outputs of said voltage converter means, said low-voltage battery and said means for supplying said backup power.
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Accused Products
Abstract
A backup power supply 11 is not loaded by peripheral equipment 9 and a low-voltage battery 5. A switch controller 12 is energized by any of the backup power supply 11, the DC/DC converter 7, and the low-voltage battery 5 for controlling the energization of a relay 3L. When the power supply from the DC/DC converter 7 and the low-voltage battery 5 to the switch controller 12 is declined, it is complemented by the backup power of a low voltage from the backup power supply 11. Accordingly, the switch controller 12 is always energized with a sufficient level of the power supply regardless of the residual storage of the low-voltage battery 5.
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Citations
9 Claims
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1. A power supply control device for an electric vehicle, comprising:
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a voltage converter means connected through a main switch to a high-voltage battery; a drive motor energized by the high-voltage battery; a low-voltage battery and vehicle periphery equipment both connected to the voltage converter means for receiving a power supply; a switch controlling means, connected to at least one of the voltage converter means and the low-voltage battery, for receiving a power supply and for controlling the opening and closing actions of the main switch; and a means for supplementally supplying a backup power to the switch controlling means so that the switch controlling means is energized with enough power to ensure a normal operation of the switch controlling means, wherein said switch controlling means receives a sum of voltage outputs of said voltage converter means, said low-voltage battery and said means for supplying said backup power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification