Patent ID: 9093680
Filing Date: 2015-07-28
Classification: H01M,Y02E

Abstract:
1. A secondary battery comprising: an electrode assembly; a battery case accommodating the electrode assembly; a lead terminal that is extended from the electrode assembly and across the battery case, wherein the lead terminal is withdrawn to the outside of the battery case wherein the lead terminal comprises a first end portion that is adjacent to the electrode assembly and a second end portion that is withdrawn to the outside; an encapsulation tape formed on a portion of the lead terminal crossing the battery case wherein the first end portion of the lead terminal is spaced from the encapsulation tape; and an insulation member that is formed on the lead terminal to overlap with at least a portion of the encapsulation tape wherein the insulation member is extended from the first end portion inside the battery case toward the second end portion outside of the battery case so as to overlap with the encapsulation tape and so that portions of the insulation member extend into the battery case and out of the battery case that are not overlapped with the encapsulation tape wherein the insulation member is interposed between the lead terminal and the encapsulation tape and wherein the insulating member is formed of an insulating resin having a melting point lower than the encapsulation tape and wherein the melting point and the thickness of the insulation member at the interface between the insulation member and the battery case is selected so that insulation member transforms into a fused or semi-fused state and the encapsulation tape maintains stability with regard to form whereby a path is formed between the interior of the battery case and the exterior of the battery case when the battery case exceeds a pre-selected temperature.