Patent ID: 9017835
Filing Date: 2015-04-28
Classification: H01M,Y02E

Abstract:
1. A secondary battery comprising: a bare cell; a protection circuit module (PCM) electrically connected to the bare cell; a can accommodating the bare cell; a first sheet formed on an exterior surface of the can; a water permeable second sheet placed on the first sheet; and a submergence label placed between the first sheet and the water permeable second sheet, the submergence label indicating whether the bare cell has been exposed to moisture, wherein the second sheet has an opening to expose the submergence label to the environment, wherein the submergence label includes a verification pattern and a substrate, wherein an edge of the substrate and an edge of the verification pattern are respectively attached to the second sheet, wherein the submergence label is farther from the bare cell than the exterior surface of the can, and wherein the submergence label is further configured to indicate whether the exterior of the can has been exposed to moisture.