Battery packs and automobiles including them

Abstract

The battery pack according to the present invention may include a cell array structure containing a plurality of battery cells; a pack case housing the cell array structure and forming a first vent path at the bottom of the cell array structure; and a lower casing located inside the pack case at one end of the cell array structure and forming a second vent path communicating with the first vent path.

Claims

1. A cell array structure containing multiple battery cells, A pack case that houses the cell array structure and forms a first vent path at the lower part of the cell array structure, A lower casing is positioned inside the pack case at one end of the cell array structure and forms a second vent path that communicates with the first vent path, A battery pack, including the battery pack.

2. The battery pack according to claim 1, wherein the second vent path is formed to intersect the first vent path perpendicularly.

3. The battery pack according to claim 1, wherein a plurality of vent holes are formed in the lower casing at positions corresponding to the first vent path along the length direction.

4. The battery pack according to claim 2, wherein the pack case is provided with at least one vent valve on both sides.

5. The battery pack according to claim 4, wherein the vent gas generated in the battery cell is discharged to the outside via the vent valve through the first vent path and the second vent path.

6. The pack case includes a bottom plate that partially faces and supports the cell array structure at its lower end, and whose vertical cross-section is provided in an uneven shape. The battery pack according to claim 1, wherein the first vent path is formed by the uneven shape.

7. The aforementioned cell array structure is Multiple unit cell groups, each including multiple battery cells and cooling tubes attached to the multiple battery cells, A side frame positioned between multiple unit cell groups, Includes, The battery pack according to claim 6, wherein the first vent path is formed parallel to the direction in which the plurality of battery cells, the cooling tubes, and the side frames are arranged in a line.

8. The aforementioned uneven shape is composed of a convex section that supports the cell array structure facing each other, and a concave section formed by recession from the convex section, which forms the first vent path. The aforementioned convex section is positioned to face the lower part of the side frame, The recessed section is positioned at a distance from the lower part of the unit cell group. The battery pack according to claim 7, wherein the first vent path is a separation space formed between the lower surface of the unit cell group and the recessed section.

9. A cell array structure containing multiple battery cells, A pack case for housing the aforementioned cell array structure, A port block connects the cell array structure and the pack case to each other, and forms a heat dissipation path by conducting heat generated in any one of the battery cells to the pack case, A battery pack, including the battery pack.

10. The battery pack according to claim 9, further comprising a lower casing disposed at one end of the cell array structure inside the pack case.

11. The port block is provided so as to extend outward from one end of the cell array structure. The battery pack according to claim 10, wherein the lower casing is positioned lower than the arrangement height of the cell array structure such that the port block is supported on the upper surface of the lower casing.

12. The battery pack according to claim 10, further comprising a heat transfer member interposed between the lower casing and the port block.

13. The cell array structure further includes a plurality of the battery cells and cooling tubes attached to the plurality of the battery cells, The battery pack according to claim 10, wherein the cooling tube is provided so as to communicate with the port block.

14. The battery pack according to claim 13, wherein the heat dissipation path is configured to go from the battery cell to the cooling tube, the port block, and the pack case, or from the battery cell to the pack case via the cooling tube, the port block, and the lower casing.

15. An automobile comprising a battery pack according to any one of claims 1 to 14.

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