【课题】提供自动回复功能正常动作,可进行低消耗化之电池状态监视电路及电池设备。【解决手段】其构成为具备用以比较自动回复电路之输出端子之电压和二次电压,将其比较结果输出至温度传感电路,并控制温度传感电路之动作的比较器。于自动回复电路之输出大时,即是仅在外部端子间连接充电器之时使温度传感电路动作。

Provided is a battery state monitoring circuit including: a charge/discharge control circuit for detecting and controlling a state of a secondary battery; an automatic recovery circuit; a temperature sensor circuit; and a comparator for comparing a voltage of an output terminal of the automatic recovery circuit and a voltage of the secondary battery, and outputting a signal indicative of a result of the comparison to the temperature sensor circuit, to control an operation of the temperature sensor circuit. The temperature sensor circuit operates only when the output of the automatic recovery circuit is larger, that is, only when a charger is connected between external terminals.