Battery charging device for electric vehicles
First Claim
1. A battery charging device for electric vehicles comprising:
- a high-voltage battery for storing electric energy to drive the electric vehicle;
a first connector for connecting the battery to a high-voltage power source outside the electric vehicle to charge the battery;
a second connector for connecting the battery to a low-voltage power source outside the electric vehicle to charge the battery;
switching means for making a selection between the first and second connectors and for connecting the battery with a selected power source; and
a DC-DC converter for converting the low-voltage supplied through the second connector to a voltage corresponding to the high-voltage.
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Accused Products
Abstract
A battery charging device for electric vehicles with a high-voltage battery, has a first connector to be connected with a high-voltage power source outside the vehicle, a second connector to be connected with a low-voltage power source outside the vehicle, a DC-DC converter for increasing the voltage of the low-voltage power source to a voltage corresponding to the high-voltage battery and a switch for changing-over the connectors are provided. In an emergency where the residual electric energy of the battery is less than required to run the required distance, the electric vehicle can easily be supplied with electric power from other vehicles such as a gasoline engine vehicle having a low-voltage power source and charge the battery by converting the supplied voltage by way of the DC-DC converter to a voltage corresponding to the voltage of the high-voltage battery.
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Citations
13 Claims
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1. A battery charging device for electric vehicles comprising:
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a high-voltage battery for storing electric energy to drive the electric vehicle; a first connector for connecting the battery to a high-voltage power source outside the electric vehicle to charge the battery; a second connector for connecting the battery to a low-voltage power source outside the electric vehicle to charge the battery; switching means for making a selection between the first and second connectors and for connecting the battery with a selected power source; and a DC-DC converter for converting the low-voltage supplied through the second connector to a voltage corresponding to the high-voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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- 7. A battery charging device for an electric vehicle with a high-voltage battery for driving the vehicle, comprising means for selectively connecting the battery to one of either a high-voltage or a low-voltage power source outside the electric vehicle to charge the battery, and means for converting the low-voltage when selectively supplied from the low-voltage power source to charge the battery to a voltage corresponding to the high-voltage.
Specification