Overcurrent testing apparatus of battery multi cell protection circuit with serial loop

PURPOSE: An over-current testing apparatus of a multi cell protection circuit is provided to apply the same power supply unit when the number of the multi cell protection circuit increases. CONSTITUTION: An over-current testing apparatus of a multi cell protection circuit comprises the following: an over-current feed unit(130) supplying the over-current by forming a serial loop with a battery side terminal and a charger side terminal of plural multi cell protection circuits; a short circuit detecting unit(140) detecting the over-current cut of the multi cell protection circuit; a power supply unit(180) supplying the power to the over-current feed unit and the short circuit detecting unit; a display unit(160) setting and displaying the operation environment of the over-current testing apparatus, and a micro computer(110) controlling the operation of all the components.