In-vehicle electric power supply apparatus
First Claim
1. An in-vehicle electric power supply apparatus comprising:
- a DC/DC converter including a capacitor for charging for voltage conversion;
a power supply circuit disposed on a high-voltage side of the DC/DC converter;
a power supply circuit disposed on a low-voltage side of the DC/DC converter;
at least one arc preventing unit disposed between the DC/DC converter and at least one of the power supply circuits, which includes a high-resistance circuit having a first resistance and a low-resistance circuit having a second resistance lower than the first resistance, wherein when the DC/DC converter and the one of the power supply circuits are to be connected to each other, the arc preventing unit is controlled so that the DC/DC converter and the one of the power supply circuits are connected each other through the high-resistance circuit and then through the low-resistance circuit, and wherein when the DC/DC converter and the one of the power supply circuits are to be disconnected from each other, the arc preventing unit is controlled so that the DC/DC converter discharges a charging voltage of the capacitor of the DC/DC converter.
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Accused Products
Abstract
An arc preventing circuit 12 is disposed between a DC/DC converter 6 and a battery (of 36 volts or 12 volts). In the arc preventing circuit 12, when the DC/DC converter 6 and the battery are to be connected to each other, the connection is performed via a circuit having a resistor R1, and then switched to that in which the connection is performed via a circuit not having the resistor R1. When the DC/DC converter 6 and the battery are to be disconnected from each other, the charging voltage of a capacitor C1 of the DC/DC converter 6 is discharged. According to the configuration, arc generation can be prevented from occurring during works of mounting and dismounting the DC/DC converter.
22 Citations
7 Claims
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1. An in-vehicle electric power supply apparatus comprising:
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a DC/DC converter including a capacitor for charging for voltage conversion;
a power supply circuit disposed on a high-voltage side of the DC/DC converter;
a power supply circuit disposed on a low-voltage side of the DC/DC converter;
at least one arc preventing unit disposed between the DC/DC converter and at least one of the power supply circuits, which includes a high-resistance circuit having a first resistance and a low-resistance circuit having a second resistance lower than the first resistance, wherein when the DC/DC converter and the one of the power supply circuits are to be connected to each other, the arc preventing unit is controlled so that the DC/DC converter and the one of the power supply circuits are connected each other through the high-resistance circuit and then through the low-resistance circuit, and wherein when the DC/DC converter and the one of the power supply circuits are to be disconnected from each other, the arc preventing unit is controlled so that the DC/DC converter discharges a charging voltage of the capacitor of the DC/DC converter. - View Dependent Claims (2)
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3. An in-vehicle electric power supply apparatus comprising:
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a DC/DC converter including a capacitor for charging for voltage conversion;
a power supply circuit disposed on a high-voltage side of the DC/DC converter;
a power supply circuit disposed on a low-voltage side of the DC/DC converter; and
at least one arc preventing unit disposed between the DC/DC converter and at least one of the power supply circuits, the arc preventing unit including, a first circuit formed by a series connection of a first switch and a first resistor, a second switch which is connected in parallel with said first circuit, a second circuit which is formed by a series circuit of a third switch and a second resistor, and is connected across terminals of the capacitor of the DC/DC converter; and
a controlling unit for, when the DC/DC converter and the one of the power supply circuits are to be connected to each other, controlling the first switch to be turned on, and then controlling the first switch to be turned off and the second switch to be turned on, and for, when the DC/DC converter and the one of the power supply circuits are to be disconnected from each other, controlling the second switch to be turned off and the third switch to be turned on. - View Dependent Claims (4, 5, 6, 7)
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Specification