Car power source apparatus for detecting a ground fault in a vehicle power supply
First Claim
1. A car power source apparatus comprising:
- a driving battery that outputs an output voltage to drive a car;
a monitoring and control circuit that monitors and controls the driving battery and is connected, via a ground line connection, to an auxiliary battery via power supply lines;
a battery case that houses the driving battery and the monitoring and control circuit and is connected to a car chassis ground via a ground line; and
a connection detection circuit that determines a condition of the ground line connection between the battery case and the car chassis ground, so as to determine whether or not the ground line connection has failed;
wherein the connection detection circuit determines the condition of the ground line connection between the battery case and the car chassis ground by detecting a condition of a connection between the battery case and one of the power supply lines connected to the auxiliary battery via the ground line and the car chassis ground.
1 Assignment
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Accused Products
Abstract
A car power source apparatus is provided to include a driving battery 11 outputting an output voltage for driving a car, a monitoring and control circuit 21 monitoring and controlling the driving battery 11 and connected to an auxiliary battery 3 via power supply lines 2, and a battery case 1 housing the driving battery 11 and the monitoring and control circuit 21 and connected to a car chassis ground 5 via a ground line 4. Further, the power source apparatus is provided with a connection detection circuit 40. This connection detection circuit 40 determines the condition of the connection of the battery case 1 and an auxiliary battery 3 power supply line 2 via the ground line 4 and the car chassis ground 5 to determine the condition of the ground line 4 connection.
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Citations
14 Claims
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1. A car power source apparatus comprising:
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a driving battery that outputs an output voltage to drive a car; a monitoring and control circuit that monitors and controls the driving battery and is connected, via a ground line connection, to an auxiliary battery via power supply lines; a battery case that houses the driving battery and the monitoring and control circuit and is connected to a car chassis ground via a ground line; and a connection detection circuit that determines a condition of the ground line connection between the battery case and the car chassis ground, so as to determine whether or not the ground line connection has failed; wherein the connection detection circuit determines the condition of the ground line connection between the battery case and the car chassis ground by detecting a condition of a connection between the battery case and one of the power supply lines connected to the auxiliary battery via the ground line and the car chassis ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification