Battery assembly and battery pack containing it

Abstract

The technical concept of the present invention provides a battery pack comprising a pack housing including a first support structure, and a battery assembly housed within the pack housing, wherein the battery assembly comprises a cell block including a plurality of battery cells stacked in a first direction, a frame including a first side cover and a second side cover spaced apart in the first direction on either side of the cell block, and a central part coupled to the frame so as to cover the cell block and a first outer part protruding outward from the first side cover, wherein the first outer part comprises a top cover fastened to the first support structure, and a first buffer space extending in the first direction is formed between the first outer part of the top cover and the first side cover.

Claims

1. A pack housing including a first support structure, The battery assembly housed within the aforementioned pack housing, Includes, The aforementioned battery assembly is A cell block comprising multiple battery cells stacked in a first direction, A frame including a first side cover and a second side cover separated in the first direction with respect to the cell block, It includes a central part connected to the frame so as to cover the cell block, and a first outer casing protruding outward from the first side cover, wherein the first outer casing is fastened to the first support structure, Includes, A battery pack in which a first buffer space extending in the first direction is formed between the first outer casing of the top cover and the first side cover.

2. The first outer casing of the top cover is A first side plate separated from the first side cover in the first direction, with the first buffer space in between, A first extension is provided that extends in the first direction between the first side plate and the center of the top cover so as to cover the first buffer space, At least one first flange connected to the first side plate and fastened to the first support structure, The battery pack according to claim 1, including the following:

3. The first side plate extends in a second direction perpendicular to the first direction, The battery pack according to claim 2, wherein the first buffer space is continuously extended in the second direction between both ends of the first side plate along the second direction.

4. The battery pack according to claim 3, wherein the length of the first buffer space along the second direction is greater than the length of the first buffer space along the first direction.

5. The battery pack according to claim 3, wherein the at least one first flange includes a plurality of first flanges spaced apart from each other in the second direction along the lower edge of the first side plate.

6. The battery pack according to claim 1, wherein the first buffer space communicates with a space formed between the lower part of the first side cover and the first support structure.

7. The pack housing further includes a second support structure, The top cover further includes a second outer casing that protrudes outward from the second side cover and is fastened to the second support structure. The battery pack according to claim 1, wherein a second buffer space extending in the first direction is formed between the second outer casing of the top cover and the second side cover.

8. The second outer casing of the top cover is A second side plate separated from the second side cover in the first direction, with the second buffer space in between, A second extension extending in the first direction between the second side plate and the center of the top cover so as to cover the second buffer space, A second flange connected to the second side plate and fastened to the second support structure, The battery pack according to claim 7, including the following:

9. The second side plate extends in a second direction perpendicular to the first direction, The second buffer space extends continuously in the second direction between the two ends of the second side plate along the second direction, The length of the second buffer space along the second direction is greater than the length of the second buffer space along the first direction. The battery pack according to claim 8, wherein the at least one second flange includes a plurality of second flanges spaced apart from each other in the second direction along the lower edge of the second side plate.

10. The frame further includes a bottom cover facing the bottom surface of the cell block, The battery pack according to claim 1, wherein the bottom cover includes a cooling channel configured for the flow of a cooling fluid.

11. The battery pack according to claim 10, wherein the bottom cover of the frame is separated from the bottom plate of the pack housing such that a space is formed between it and the bottom plate of the pack housing.

12. A cell block comprising multiple battery cells stacked in a first direction, A frame including a first side cover and a second side cover separated in the first direction with respect to the cell block, The top cover includes a central part connected to the frame so as to cover the cell block, and a first outer casing protruding outward from the first side cover, wherein the first outer casing includes a top cover with a first flange configured to be fastened to an external first support structure, Includes, A battery assembly wherein a first buffer space extending in the first direction is formed between the first outer casing of the top cover and the first side cover.

13. The top cover further includes a second outer casing which includes a second flange configured to protrude outward from the second side cover and be fastened to an external second support structure. The battery assembly according to claim 12, wherein a second buffer space extending in the first direction is formed between the second outer casing of the top cover and the second side cover.

14. The first outer casing of the top cover is A first side plate is separated from the first side cover in the first direction across the first buffer space and connected to the first flange, A first extension is provided that extends in the first direction between the first side plate and the center of the top cover so as to cover the first buffer space, It further includes, The second outer casing of the top cover is A second side plate is separated from the second side cover in the first direction, with the second buffer space in between, and is connected to the second flange. A second extension extending in the first direction between the second side plate and the center of the top cover so as to cover the second buffer space, The battery assembly according to claim 13, further comprising:

15. The battery assembly according to claim 14, wherein the top cover has an integrated structure.

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