Patent ID: 8900732

Claim:
A battery temperature control apparatus comprising: a cooling fan; a temperature sensor control part comprising: an analog/digital (A/D) converter part in communication with the temperature sensor, A/D converter configured to convert the analog resistance value of the temperature sensor to a digital signal; a high-speed switching device in communication with the A/D converter and a cooling fan power supply, the high speed switching device configured to process the digital signal and generate a driving signal from the cooling fan power supply for controlling the cooling fan based on the digital signal; and a cooling fan speed controller in communication with the high speed switching device and the cooling fan, the cooling fan speed controller configured to control a rotation speed of the cooling fan according to the temperature of the battery; a defect discrimination part in communication with the high speed switching device, the defect discrimination part comprising: a cooling fan speed sensor; a processor configured to receive the driving signal for controlling the cooling fan and to compare the driving signal for controlling the cooling fan with a sensed actual rotation speed of the cooling fan to sense a defect when the cooling fan is in an off state even when receiving a power application signal, or when the cooling fan does not rotate at and input rotation speed.