Patent ID: 7923141

Claim:
A cooling device for cooling a battery contained in a battery case and mounted on a vehicle, the cooling device comprising: an air supply channel achieving fluid communication between a vehicle interior or an outside of the vehicle and an inner part of the battery case; an air supply system for supplying a volume of air via the air supply channel to the inner part of the battery case; a filter member disposed in the air supply channel; and a control system, the control system including a current value detecting portion and a judgment portion; wherein the air supply system comprises a fan and a motor for driving the fan, the motor being driven by a constant voltage system, the current value detecting portion detects a current value of an electric current supplied to the motor, and the judging portion compares the current value detected by the current value detecting portion and a preset reference current value and, when the detected current value of the electric current supplied to the motor is lower than the preset reference current value, judges that a load on the motor has decreased, wherein the judging portion determines from the decreased load on the motor that there is an anomaly in the volume of the air supplied to the battery case, wherein the judging portion outputs a warning signal when the anomaly is determined, and wherein the reference current value is set based on the current value of the electric current supplied to the motor when the fan is driven while an unused filter member is provided.