Patent ID: 7897280
Filing Date: 2011-03-01
Classification: H01M,Y02E,Y02P

Abstract:
1. A sheet-shaped safety kit configured to be attached to opposite major surfaces of an electrode assembly for secondary batteries, comprising: first pair of metal sheets including a first upper sheet and a first lower sheet; a interconnection part having a first edge and a second edge substantially parallel to each other, wherein the first edge and the second edge are connected to the first upper sheet and the first lower sheet of the first pair of metal sheets, respectively; a second pair of metal sheets including a second upper sheet and a second lower sheet, wherein the second upper sheet and the second lower sheet of the second pair of metal sheets are oppositely disposed substantially adjacent to the first upper sheet and the second upper sheet of the first pair of metal sheets, respectively; and an insulation sheet including an upper portion disposed between the first upper sheet and the second upper sheet and a lower portion disposed between the first lower sheet and the second lower sheet, wherein the fist pair of metal sheets are connected to one of a cathode terminal and an anode terminal of the electrode assembly and the second pair of metal sheets are connected to the other of the cathode terminal and the anode terminal of the electrode assembly when the sheet-shaped safety kit is attached to the electrode assembly, wherein a length of the interconnection part in a direction substantially parallel to the first edge of the interconnection part is less than a length of the first pair of metal sheets in the direction substantially parallel to the first edge of the interconnection part and a length of the second pair of metal sheets in the direction substantially parallel to the first edge of the interconnection part, and wherein corners of the first pair of metals sheets adjacent to the interconnection part are formed in a arc shape having a first curvature radius, and corners of the second pair of metal sheets adjacent to the interconnection part are formed in a arc shape having a second curvature radius substantially greater than the first curvature radius.