Patent ID: 8513922

Claim:
A battery pack, comprising: a battery cell; a charge-blocking unit; a voltage sensing and balancing circuit; and a microcomputer, the microcomputer including a controller configured to detect at least one selected from the group of abnormal analog-to-digital conversion, abnormal voltage, and abnormal temperature of the battery cell, the controller configured to output a charge control signal to the charge-blocking unit to inhibit charging of the battery cell, wherein: the microcomputer further includes an analog-to-digital (A/D) converter that converts analog voltage, temperature, and current measurements from the battery cell into digital output values, and the controller outputs a charge control signal to the charge-blocking unit if the difference between a measurement value obtained by inputting a voltage of a zener diode to the A/D converter and a reference value recorded during an initial test of the microcomputer is equal to or greater than a first threshold.