Patent ID: 7662506

Claim:
A safety device of a battery, comprising: a pressure releasing unit provided at a cell of the battery, said pressure releasing unit configured to release an internal pressure within the cell when the internal pressure of the cell exceeds a predetermined set pressure; a protection circuit assembly coupled to a surface of the cell provided with the pressure releasing unit; a space forming member formed of a first resin and covering the pressure releasing unit; and an injection-molded cover member formed of a second resin and configured to encompass the space forming member and the protection circuit assembly, wherein the space forming member is configured to form an empty space around the pressure releasing unit such that when the internal pressure of the cell exceeds the predetermined set pressure, the released internal pressure is released into the empty space formed by the space member, and wherein a melting temperature of the first resin is higher than a melting temperature of the second resin so as to prevent molten material of the cover member from being introduced into the empty space.