电池装置以及用电设备

Abstract

本申请公开了一种电池装置以及用电设备，涉及电池技术领域，用于保证电池装置中箱体组件的结构强度。电池装置包括箱体组件以及电池单体，箱体组件包括多个壁结构，多个壁结构形成容纳腔，多个壁结构包括第一壁。电池单体容置于容纳腔。其中，第一壁包括沿箱体组件壁厚方向层叠设置的至少两层复合材料层，复合材料层由至少一层纤维织物层形成，在复合材料层的延展方向上，相邻的复合材料层的外边缘相连接。本申请中的电池装置用于储存电能。

Claims

1. A battery device, characterized by, include: A housing assembly includes multiple wall structures forming a receiving cavity, the multiple wall structures including a first wall; A battery cell, wherein the battery cell is housed in the receiving cavity; The first wall includes at least two composite material layers stacked along the wall thickness direction of the housing assembly. Each composite material layer is formed by at least one layer of fiber fabric, and the outer edges of adjacent composite material layers are connected in the extension direction of the composite material layers.

2. The battery device according to claim 1, characterized by In the extension direction of the composite material layer, adjacent composite material layers are connected by a connection region, in which at least one of the fiber fabric layers in the adjacent composite material layers overlaps and connects along the wall thickness direction of the housing assembly.

3. The battery device of claim 2, wherein, Within the connection area, adjacent composite material layers overlap.

4. The battery device of claim 2, wherein Within the connection area, adjacent composite material layers are butted together; the battery device further includes an overlap layer that at least covers the butt joint of the adjacent composite material layers.

5. The battery device according to any one of claims 2 to 4, characterized by, In the extension direction of the composite material layer, adjacent composite material layers also have non-connected regions that are different from the connected regions, and the outer surface of the connected region is flush with the outer surface of the non-connected region.

6. The battery device according to any one of claims 2 to 5, wherein Within the connection area, the thickness of the overlapping connection is 1.5 to 2 times the thickness of any one of the adjacent composite material layers.

7. The battery device according to any one of claims 2 to 6, wherein The plurality of wall structures also include a bottom wall, on which the battery cell is supported; there are a plurality of first walls, which are arranged circumferentially along the bottom wall; the at least two composite material layers include a first composite material layer and a second composite material layer; the first composite material layers of the plurality of first walls and the bottom wall define the receiving cavity with an opening; and the plurality of second composite material layers are located on the side of the corresponding plurality of first composite material layers opposite to the receiving cavity. On the same first wall, the first composite material layer extends from the opening of the receiving cavity to the outside of the receiving cavity and overlaps with the second composite material layer.

8. The battery device of claim 7, wherein, The plurality of first walls include two beam members and two side plate members. The two beam members are disposed at opposite ends of the bottom wall along a first direction, and the two side plate members are disposed at opposite ends of the bottom wall along a second direction, the first direction and the second direction intersecting each other. The battery device also includes a battery cell assembly, the battery cell assembly including a plurality of battery cells stacked along the first direction. In the same beam member, the first composite material layer extends from the opening of the receiving cavity to the outside of the receiving cavity and overlaps with the second composite material layer, and the connection area is located on the side of the beam member away from the receiving cavity.

9. The battery device of claim 8, wherein, In the same beam member, along the extension direction of the first composite material layer, the first composite material layer includes a connected first component layer and a first overlapping connection layer. The first component layer participates in defining the receiving cavity. The first overlapping connection layer is spaced apart on the side of the first component layer opposite to the receiving cavity. Along the circumferential direction of the bottom wall, the second composite material layer includes a second overlapping connection layer and an abutment layer. The second overlapping connection layer is spaced apart on the side of the first component layer opposite to the receiving cavity. The two opposite ends of the second overlapping connection layer are connected to the abutment layer. The abutment layer abuts against the surface of the first component layer on the side opposite to the receiving cavity and seals the opening between the ends of the first component layer and the first overlapping connection layer located at the same end.

10. The battery device of claim 8, wherein, In the same beam member, along the extension direction of the first composite material layer, the first composite material layer includes a connected third overlapping connection layer and a second component layer, the second component layer participating in the definition of the receiving cavity, the third overlapping connection layer being partially spaced apart on the side of the second component layer opposite to the receiving cavity, and along the circumferential direction of the bottom wall, the end of the third overlapping connection layer being bent to connect with the second component layer; the second composite material layer being spaced apart on the side of the second component layer opposite to the receiving cavity, and overlapping and connecting with the third overlapping connection layer.

11. The battery device according to any one of claims 7 to 10, wherein The plurality of first walls include two beam members and two side plate members. The two beam members are disposed at opposite ends of the first wall along a first direction, and the two side plate members are disposed at opposite ends of the first wall along a second direction, the first direction and the second direction intersecting each other. The battery device also includes a battery cell assembly, the battery cell assembly including a plurality of battery cells stacked along the first direction. In the same side panel member, the first composite material layer extends from the opening of the receiving cavity to the outside of the receiving cavity and overlaps with the second composite material layer, and the connection area is located on the side of the side panel member away from the bottom wall.

12. The battery device according to any one of claims 7-11, characterized in that, The battery cell has a pressure relief structure, and the pressure relief port of the battery cell is arranged such that it faces the bottom wall. The bottom wall has a through hole that penetrates the bottom wall. Along the thickness direction of the bottom wall, the projection of the pressure relief port on the bottom wall is located in the through hole.

13. The battery device of claim 12, wherein, The battery device also includes a protective film disposed on the bottom wall and covering the through hole.

14. The battery device of claim 13, wherein, The battery device further includes a battery cell assembly, which includes a plurality of stacked battery cells; the protective film includes a body portion and a flange portion, and the flange portion is connected to the end of the body portion along the stacking direction of the plurality of battery cells. The body portion is attached to the inner wall surface of the bottom wall to cover the through hole, and the flange portion overlaps the inner wall surface of the first composite material layer of the first wall.

15. The battery device of claim 14, wherein, The inner wall surface of the first composite material layer of the first wall has a clearance groove, and the flange is located in the clearance groove.

16. The battery device according to claim 14 or 15, characterized in that, Along the arrangement direction of the main body and the flanged portion, the size of the flanged portion is 5.0mm-30mm.

17. The battery device of any one of claims 2-16, wherein, The plurality of wall structures also include a bottom wall, on which the battery cell is supported. The bottom wall includes at least two composite material layers. There are a plurality of first walls. The plurality of first walls are arranged circumferentially along the bottom wall. The at least two composite material layers include a first composite material layer and a second composite material layer. The plurality of first composite material layers define a receiving cavity with an opening. The plurality of second composite material layers are located on the side of the corresponding plurality of first composite material layers opposite to the receiving cavity. In different wall structures, along the extension direction of the first composite material layer, at least one layer of the fiber fabric layer in the adjacent first composite material layer overlaps and connects along the wall thickness direction of the housing assembly. And / or, In different wall structures, along the extension direction of the second composite material layer, at least one layer of the fiber fabric layer in adjacent second composite material layers overlaps and connects along the wall thickness direction of the housing assembly.

18. The battery device of claim 17, wherein, Within the connection area, adjacent composite material layers are butted together; the battery device further includes an overlap layer that at least covers the butt joint of adjacent composite material layers; The adjacent wall structures have a butt joint between first composite material layers located on the same layer, and the overlapping layer at least covers the butt joint between the adjacent first composite material layers; And / or, The butt joint is located between the second composite material layers of adjacent wall structures on the same layer, and the overlapping layer at least covers the butt joint between adjacent second composite material layers.

19. The battery device of claim 18, wherein, The adjacent wall structure is adjacent to the first wall.

20. The battery device according to claim 19, characterized in that, The overlapping layer is formed on the same side of the first composite material layers of two adjacent first walls; and / or, the overlapping layer is formed on the same side of the second composite material layers of two adjacent first walls.

21. The battery device according to claim 18 or 19, characterized in that, The first composite material layer of two adjacent first walls located on the same layer and the first composite material layer of the bottom wall are covered by the overlapping layer at the first intersection point; And / or, The second composite material layer located on the same layer of the two adjacent first walls and the second composite material layer of the bottom wall are covered by the overlapping layer at the second intersection point.

22. The battery device of claim 21, wherein, The overlapping layer is provided with a shearing opening, and the shearing opening on the overlapping layer of the first composite material layer extends outward from the first intersection point to the edge of the overlapping layer; and / or, the shearing opening on the overlapping layer of the second composite material layer extends outward from the second intersection point to the edge of the overlapping layer.

23. The battery device of claim 22, wherein, The shearing opening is positioned to avoid the butt joint.

24. The battery device of any one of claims 7-23, wherein, The bottom wall and the plurality of first walls constitute a box body, and the box body assembly includes two box body sections that are interlocked and connected to each other.

25. The battery device of any one of claims 1-24, wherein, The at least two composite material layers include an insulating structural layer and a fiber composite material layer, the insulating structural layer defining the receiving cavity, and the fiber composite material layer located on the side of the insulating structural layer opposite to the receiving cavity.

26. The battery device of claim 25, wherein, The fiber fabric layer in the insulating structure layer is composed of a first fiber material and a first substrate, both of which are insulating materials; the fiber fabric layer in the fiber composite material layer is composed of a second fiber material and a second substrate, wherein the first fiber is different from the second fiber.

27. An electrical device, comprising: Includes the battery device according to any one of claims 1 to 26 for providing electrical energy.

28. The powered device of claim 27, wherein, The electrical equipment includes aircraft.

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