CHARGE AND DISCHARGE CONTROL CIRCUIT, CHARGE AND DISCHARGE CONTROL APPARATUS, AND BATTERY APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a battery apparatus having high safety and high accuracy of an overcurrent detection current value.SOLUTION: A voltage reference circuit of an overcurrent detection circuit is constituted of a constant current circuit, a resistor, and a transistor whose resistance is varied according to a voltage of the secondary battery, connected to both terminals of a secondary battery. A voltage generated by a current of the constant current circuit flowing through the resistor and the transistor is output as a reference voltage.