APPARATUS AND METHOD FOR DETECTING INTERNAL MICRO SHORT CIRCUIT OF BATTERY

An apparatus for detecting an internal micro short circuit of a battery. A battery is continuously monitored during a formation and charging process of the battery, and a signal of a quickly changing voltage is filtered out by using a differentiation circuit. The direct-current voltage of a battery is isolated according to the characteristics of the differentiation circuit, and furthermore, a separated signal of a slightly changing voltage is sent to an amplifier for amplification, such that the requirement for a high-precision meter is lowered; and amplified signals are collected by using a high-speed AD converter, a captured voltage change signal is transmitted to a computer by means of a single-chip microcomputer, and finally, a product in which an internal micro short circuit occurs is determined. Moreover, positive amplification and negative amplification can both be used, and secondary amplification is carried out, such that a subtle voltage or current change of the battery is detected more effectively