Patent ID: 8212385
Filing Date: 2012-07-03
Classification: B60L,G01R,Y02T

Abstract:
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.