Patent ID: 8568910
Filing Date: 2013-10-29
Classification: H01M,H02H,Y02E

Abstract:
1. A protective circuit module for a secondary battery comprising: a circuit board having a through hole; at least one protection control circuit element on the circuit board for preventing overcharge and over-discharge of the secondary battery; a first conductive pad coupled to the circuit board, wherein the first conductive pad comprises: a positive temperature coefficient device between the at least one protection control circuit element and the first conductive pad, wherein the positive temperature coefficient device is resistance welded to and directly contacts the plate portion such that when a secondary battery temperature reaches a threshold value, resistance of the positive temperature coefficient device is increased and battery current is reduced, wherein the positive temperature coefficient device comprises: a first conductive plate resistance welded to the plate portion; a positive temperature coefficient resistance element connected to the first conductive plate; and a second conductive plate connected to the positive temperature coefficient resistance element, wherein the second conductive plate directly contacts both the circuit board and the positive temperature coefficient resistance element.