Patent ID: 9350179
Filing Date: 2016-05-24
CPC Classification: B60L,H02J,H02P,Y02T

Claim Text:
1. A charging device for charging a battery of a vehicle, the charging device comprising: an insulation resistance detecting circuit including a coupling capacitor, the insulation resistance detecting circuit being disposed between the battery and a vehicle body for detecting an insulation resistance between the battery and the vehicle body; a charging circuit having an input terminal to be coupled to an alternating current source and an output terminal to be coupled to the battery, the charging circuit converting an alternating current supplied from the alternating current source into a direct current and charging the battery in a state without insulating the input terminal and the output terminal and in a state where the vehicle body is coupled to an earth; a leak current detecting circuit being coupled to the charging circuit, the leak current detecting circuit detecting a leak current flowing between the charging circuit and the earth; a decoupling circuit coupling and decoupling the insulation resistance detecting circuit to and from the battery; and a control circuit controlling the decoupling circuit, wherein: the insulation resistance detecting circuit is configured so that a current flows from the battery to the vehicle body through the coupling capacitor in a state where the insulation resistance detecting circuit is coupled to the battery through the decoupling circuit, and the control circuit controls the decoupling circuit to decouple the insulation resistance detecting circuit from the battery so that the coupling capacitor is decoupled from the battery to prohibit the electric current from the battery to the vehicle body through the coupling capacitor, when the charging circuit is coupled to the alternating current source to charge the battery.