Patent ID: 8920952

Claim:
A battery pack assembly comprising: an inner pack accommodating a plurality of secondary cells; an outer pack accommodating the inner pack; a first shock absorbing member between a first surface of the inner pack and a first surface of the outer pack, the first shock absorbing member configured to absorb a shock between the inner pack and the outer pack; and a second shock absorbing member between at least a side surface of the inner pack and a side surface of the outer pack among surfaces of the inner pack and the outer pack other than the first surfaces, the second shock absorbing member configured to absorb a shock between the inner pack and the outer pack, wherein the inner pack comprises an inlet at a bottom portion of the inner pack through which a gas flowing in the inner pack enters, and cylindrical outlet at an upper portion of the inner pack through which the gas flowing in the inner pack exits, wherein the cylindrical outlet extends along a direction of deformation of the first shock absorbing member and passes through the outer pack, and wherein the second shock absorbing member comprises an elastic and thermally insulative material.