Battery pack

Abstract

The present invention provides a battery pack having high energy density and excellent cooling efficiency. It also provides a battery pack that can guide the flow of gas released from the battery cells in a predetermined direction. A battery pack is provided, comprising: a plurality of cell units, each containing one or more battery cells; one or more spacers disposed between the plurality of cell units and provided with one or more vent passages through which gas released from one or more battery cells can flow; and one or more cooling members disposed opposite at least one of the plurality of cell units, wherein the plurality of cell units and the one or more cooling members are arranged along a first direction, and the plurality of cell units and the one or more spacers are arranged along a second direction intersecting the first direction.

Claims

1. Multiple cell units, each containing one or more battery cells, One or more spacers are arranged between the plurality of cell units and are provided with one or more vent flow channels through which gas released from one or more battery cells can flow, One or more cooling members are arranged opposite to at least one of the plurality of cell units, Includes, The plurality of cell units and the one or more cooling members are arranged along the first direction, A battery pack in which the plurality of cell units and the one or more spacers are arranged along a second direction intersecting the first direction.

2. The battery pack according to claim 1, wherein in at least one of the plurality of cell units, one or more battery cells are provided in a plurality and are stacked along the first direction.

3. The battery pack according to claim 1, wherein the plurality of cell units and the one or more cooling members are arranged alternately along the first direction.

4. The one or more battery cells mentioned above are A cell case enclosing the electrode assembly, On at least one side of the cell case, a seal portion is formed by sealing the cell case, Includes, The battery pack according to claim 1, wherein the spacer is arranged opposite to the sealing portion.

5. A lower frame that houses the plurality of cell units, An upper frame that covers the upper part of the lower frame, The battery pack according to claim 1, further comprising a pack housing including a battery pack.

6. The system further includes a busbar assembly that electrically connects the plurality of cell units, The battery pack according to claim 5, wherein the busbar assembly is positioned between the plurality of cell units and the upper frame.

7. The one or more battery cells mentioned above are The battery pack according to claim 6, comprising one or more lead tabs that protrude toward the upper frame and are electrically connected to the busbar assembly.

8. The aforementioned busbar assembly is A busbar electrically connected to at least one of the plurality of cell units, A busbar frame supporting the busbar and provided with a first vent hole from which gas released from the plurality of cell units can be discharged, The battery pack according to claim 6, including the following:

9. The battery pack according to claim 8, wherein one or more spacers are coupled to the busbar frame.

10. The previous spacer is One or more inflow holes that are open in the direction toward one or more battery cells, One or more discharge holes are provided so that the gas that has flowed into the inlet hole can be discharged, The battery pack according to claim 5, including the following:

11. The battery pack according to claim 10, wherein the spacer has an opening in the direction toward the cell mounting surface of the lower frame.

12. The aforementioned plurality of cell units are First cell unit and second cell unit that contact both sides of the one or more spacers, respectively Includes, The one or more spacers mentioned above are A first vent flow path section through which the gas released from the first cell unit can flow, A second vent channel section through which the gas released from the second cell unit can flow, A partition wall separating the first vent channel section and the second vent channel section, The battery pack according to claim 1, including the following:

13. The cooling member is A cooling body portion is positioned opposite to one or more battery cells, A cooling channel is provided inside the cooling body and configured to allow the refrigerant to flow, The battery pack according to claim 1, including the following:

14. The battery pack according to claim 13, wherein the cooling channel has a path that is bent at least once inside the cooling body portion.

15. The pack housing further includes a refrigerant pipe configured to house the plurality of cell units and allow the refrigerant to flow, The battery pack according to claim 13, wherein the cooling channel of the cooling member is in communication with the refrigerant pipe.

16. The cooling member is The battery pack according to claim 13, further comprising a plurality of refrigerant ports arranged on one side of the cooling member in the second direction and on the other side of the cooling member in the second direction, respectively, and communicating with the cooling channel.

17. The aforementioned plurality of refrigerant ports are A plurality of refrigerant inlet ports are arranged on one side of the cooling member in the second direction, A plurality of refrigerant discharge ports are arranged on the other side of the cooling member in the second direction, Includes, The battery pack according to claim 16, wherein the cooling channel extends along the second direction from the plurality of refrigerant inlet ports to the plurality of refrigerant outlet ports.

18. The cell tray further includes the plurality of cell units on which the cell units are installed. The aforementioned cell tray is A second vent hole configured to allow gas generated from one or more battery cells to pass through. A battery pack according to any one of claims 1 to 17, including the battery pack according to any one of claims 1 to 17.

19. The previous spacer is One or more inflow holes that are open in the direction toward one or more battery cells, One or more discharge holes are configured to allow the gas flowing into the inlet hole to be discharged, and are positioned opposite the second vent hole of the cell tray, The battery pack according to claim 18, including the following:

20. The pack housing further includes a pack housing that accommodates the plurality of cell units, The battery pack according to claim 18, wherein a vent space is formed between the lower surface of the cell tray and the pack housing.

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