Battery pack assembly

1. 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.

2. The battery pack assembly of claim 1 , wherein the first shock absorbing member comprises a spring.

3. The battery pack assembly of claim 1 , wherein the second shock absorbing member contacts the side surface of the inner pack and the side surface of the outer pack.

4. The battery pack assembly of claim 1 ,

wherein the inner pack and the outer pack have substantially hexahedral shapes, and

wherein the second shock absorbing member comprises:

a first shock absorption unit between the side surface of the inner pack and the side surface of the outer pack; and

a second shock absorption unit between a second surface of the inner pack and a second surface of the outer pack, the second surfaces of the inner and outer packs being opposite the first surfaces.

5. The battery pack assembly of claim 4 , wherein the first shock absorption unit is fixed to the side surface of the outer pack.

6. The battery pack assembly of claim 1 , further comprising a third shock absorbing member between a second surface of the inner pack and a second surface of the outer pack, the second surfaces of the inner and outer packs being opposite the first surfaces.

7. The battery pack assembly of claim 6 , wherein the third shock absorbing member comprises a spring.

8. The battery pack assembly of claim 7 , wherein the second shock absorbing member comprises:

a first shock absorption unit between the side surface of the inner pack and the side surface of the outer pack; and

a second shock absorption unit between the second surface of the inner pack and the second surface of the outer pack.

9. The battery pack assembly of claim 1 , further comprising a plurality of flow channels between neighboring secondary cells of the plurality of secondary cells and through which the gas for controlling temperatures of the plurality of secondary cells flows.

10. The battery pack assembly of claim 1 , wherein the gas flowing in the inner pack enters and exits the inner pack to control temperatures of the plurality of secondary cells.

11. The battery pack assembly of claim 1 , further comprising a cooling unit to supply a cooling gas to the inner pack.

12. The battery pack assembly of claim 1 , further comprising a heating unit to supply a heating gas to the inner pack.

13. The battery pack assembly of claim 1 , wherein the battery pack assembly is configured for use as a power source for propelling an electric vehicle or a hybrid electric vehicle.