Patent ID: 8035348

Claim:
A battery overheating protection circuit, comprising: a connection jack configured for connecting with a power source; a charging module connected with the connection jack and configured for recharging a battery; a temperature detection module configured for detecting a temperature of the battery and generating a temperature voltage proportional to the temperature; a reference voltage module configured for providing a first reference voltage in a battery charging process and a second reference voltage in a drawing battery power process; a comparison circuit configured for comparing the temperature voltage with the first reference voltage in the battery charging process and comparing the temperature voltage with the second reference voltage in the drawing battery power process, and outputting a protection signal when the comparison result indicates the temperature voltage of the battery goes higher than the first reference voltage in the battery charging process or the second reference voltage in the drawing battery power process; a control module configured for receiving the protection signal and disabling the charging module to charge the battery in the battery charging process; and a path switch located along a conducting path to draw power from the battery and configured for cutting off the conducting path when receiving the protection signal in the drawing battery power process.