| 摘要 |
A battery pack includes a protection circuit which detects overcharge, over-discharge, and overcurrent of a secondary battery and turns OFF a switch element arranged on a line between the secondary battery and a load or a charge device. The battery pack further includes: a series circuit of a thermistor and resistor arranged in the vicinity of the secondary battery and connected in parallel to the secondary battery; and a first comparator arranged in the protection circuit for comparing a voltage at a connection point between the thermistor and the resistor to a first reference voltage corresponding to a first predetermined temperature. The protection circuit turns OFF the switch element when the temperature of the secondary battery exceeds the first predetermined temperature according to the output signal from the first comparator. |
