CN-224232796-U - Box assembly, battery device and power utilization device

Abstract

The embodiment of the application provides a box body assembly, a battery device and an electric device, wherein the battery device comprises a battery monomer and a plurality of sub-boxes, the sub-boxes are jointly enclosed to form an accommodating space, the battery monomer is positioned in the accommodating space, the sub-boxes comprise a first box body, the first box body comprises a body and a sealed edge, the body forms a part of the inner wall of the accommodating space, the sealed edge is arranged at the edge of the body, the sealed edge is of a continuous fiber composite material structure and at least partially extends in a bending mode, so that the sealed edge forms a multi-layer structure overlapped along a first direction, and the multi-layer structure is in sealing fit with other sub-boxes along the first direction. The battery device in the embodiment of the application is beneficial to improving the structural strength, improving the sealing effect between other sub-boxes, forming a multi-layer structure in a bending and edge sealing mode in the manufacturing process, maintaining the continuity of fibers among structures of different layers in the multi-layer structure, simplifying the manufacturing process of the multi-layer structure and improving the production efficiency.

Inventors

• DONG FANGLIANG
• NI JIANBIN
• TANG ZHILEI
• LU JIA

Assignees

• 宁德时代未来能源(上海)研究院有限公司
• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260512

Application Date

20250415

Claims (20)

1. 1. A battery device, characterized in that the battery device comprises: a battery cell; The battery pack comprises a plurality of sub-boxes, wherein an accommodating space is formed by surrounding the sub-boxes together, the battery cells are located in the accommodating space, each sub-box comprises a first box body, each first box body comprises a body and an edge sealing, the bodies form a part of the inner walls of the accommodating space, the edge sealing is arranged at the edges of the bodies, each edge sealing is of a continuous fiber composite material structure and at least partially extends in a bending mode, so that the edge sealing forms a multi-layer structure overlapped along a first direction, and the multi-layer structure and the other sub-boxes are in sealing fit along the first direction.
2. 2. The battery device of claim 1, wherein the edge seal comprises a plurality of continuous fiber composite layers, each of the continuous fiber composite layers comprising continuous fibers and a thermoplastic resin matrix connected to the continuous fibers.
3. 3. The battery device of claim 1, wherein the seal comprises a sealing portion connected to the body, one side of the sealing portion along a first direction being in sealing engagement with the other sub-housings along the first direction, and an overlapping portion, at least part of which is located on the other side of the sealing portion and forms the multilayer structure together with the sealing portion.
4. 4. A battery device according to claim 3, wherein a part of the continuous fibers in the sealed edge is located in the sealing portion and another part is located in the overlap portion.
5. 5. The battery device according to claim 3, wherein the stacking portion further includes a first bending portion and a stacking sub-portion, the first bending portion being located at an end of the sealing portion remote from the body, the first bending portion bending toward one side of the sealing portion away from the other sub-cases in a first direction and connecting the stacking sub-portion and the sealing portion, the stacking sub-portion to which the first bending portion is connected being attached to the sealing portion in the first direction, the stacking sub-portion and the sealing portion forming the multilayer structure together.
6. 6. The battery device according to claim 5, wherein the number of the stacked sub-portions is plural, the plural stacked sub-portions are stacked in the first direction, the stacked portion further includes a second bent portion that extends bent in a direction away from the sealing portion and connects two stacked sub-portions adjacent in the first direction.
7. 7. The battery device according to claim 3, wherein the edge-sealed winding forms a wound body, an axial direction of the wound body is perpendicular to the first direction, and an outermost layer of the wound body forms the sealing portion along a portion of a side of the first direction adjacent to the other sub-case.
8. 8. A battery device according to claim 3, wherein the body includes a first wall extending in the first direction and forming a part of an inner wall of the accommodation space, one end of the first wall in the first direction being connected to the sealing portion, the stacking portion being disposed at a distance from the first wall.
9. 9. The battery device according to claim 8, wherein the first case further includes a filler that fills in a gap between the overlap portion and the first wall and connects the first wall, the overlap portion, and the seal portion.
10. 10. The battery device of claim 9, wherein the edge seal comprises a thermoplastic resin matrix, the filler is coupled to the thermoplastic resin matrix, and the filler is of the same material as the thermoplastic resin matrix.
11. 11. The battery device of claim 1, wherein the first housing is a continuous fiber composite structure and is of unitary construction such that a portion of the continuous fibers in the first housing are located in the body and another portion are located in the seal.
12. 12. The battery device of claim 11, wherein the thickness dimension of the body is the same as the thickness dimension of the seal.
13. 13. The battery device according to claim 1, further comprising a fastener, wherein the multilayer structure is provided with a mounting hole penetrating in the first direction, and the fastener is penetrated in the mounting hole and connected with the other sub-cases to fix the first case with the other sub-cases.
14. 14. An electricity consumption device, characterized in that it comprises a battery device according to any one of claims 1 to 13 for use as a power source for the electricity consumption device.
15. 15. The utility model provides a box subassembly for hold battery monomer, its characterized in that, box subassembly includes a plurality of sub-boxes, and a plurality of sub-boxes enclose jointly and establish and form accommodation space, accommodation space is used for holding battery monomer, the sub-box includes first box, first box includes body and banding, the body forms a part of accommodation space's inner wall, the banding is located the edge of body and with other sub-box is along sealed cooperation in first direction, the banding is continuous fiber composite structure, the banding is integrated into one piece structure and crooked extension, so that at least part of banding is followed the multilayer structure is formed in the first direction superpose.
16. 16. The tank assembly of claim 15, wherein the seal edge includes a sealing portion in sealing engagement with the other sub-tanks in the first direction, the sealing portion being connected to the body, and an overlapping portion on a side of the sealing portion facing away from the other sub-tanks in the first direction, the overlapping portion and the sealing portion together forming the multi-layer structure.
17. 17. The tank assembly of claim 16 wherein a portion of the continuous fibers in the seal edge are located in the seal portion and another portion are located in the overlap portion.
18. 18. The tank assembly of claim 16, wherein the stacking portion further comprises a first bending portion and a stacking sub-portion, one end of the first bending portion is connected to the sealing portion, the first bending portion extends to bend toward one side of the sealing portion away from the other sub-tank in a first direction and is connected to the stacking sub-portion, and the stacking sub-portion to which the first bending portion is connected is attached to the sealing portion in the first direction.
19. 19. The cabinet assembly according to claim 16, wherein the body includes a first wall extending in the first direction and forming a part of an inner wall of the receiving space, one end of the first wall in the first direction being connected to the sealing portion, and the stacking portion being spaced apart from the first wall.
20. 20. The tank assembly of claim 19, wherein the first tank further comprises a filler that fills in the gap between the overlap and the first wall and connects the first wall, the overlap and the seal.

Description

Box assembly, battery device and power utilization device Technical Field The embodiment of the application relates to the technical field of batteries, in particular to a box assembly, a battery device and an electric device. Background In recent years, in order to increase the energy density of a battery device, a case assembly of the battery device is manufactured using a composite material to reduce the weight of the case assembly. The box body assembly comprises a plurality of sub-box bodies, and sealing fit is realized among the sub-box bodies through respective sealing surfaces. In order to improve the sealing effect, the thickness of the structure of the sub-tank forming the sealing surface is larger than that of the structure of the other parts of the sub-tank. In the related art, in order to manufacture a structure forming a sealing surface with a larger thickness, a manufacturing process of multi-layered laying, i.e., laying a plurality of composite material layers stacked on each other in a normal direction of the sealing surface, is employed. However, the manufacturing process of the multi-layer paving is long, and the fibers in each composite material layer are not connected with each other, which is not beneficial to improving the overall strength of the structure. Disclosure of utility model In view of the foregoing, it is desirable to provide a case assembly, a battery device, and an electric device that are advantageous for improving manufacturing efficiency. In order to achieve the purpose, the technical scheme of the embodiment of the application is realized as follows: an embodiment of the present application provides a battery device including: a battery cell; The battery pack comprises a plurality of sub-boxes, wherein an accommodating space is formed by surrounding the sub-boxes together, the battery cells are located in the accommodating space, each sub-box comprises a first box body, each first box body comprises a body and an edge sealing, the bodies form a part of the inner walls of the accommodating space, the edge sealing is arranged at the edges of the bodies, each edge sealing is of a continuous fiber composite material structure and at least partially extends in a bending mode, so that the edge sealing forms a multi-layer structure overlapped along a first direction, and the multi-layer structure and the other sub-boxes are in sealing fit along the first direction. According to the battery device, under the condition that the thickness dimension of the sealing edge is fixed, the multi-layer structure is formed by overlapping the sealing edge, the dimension of the sealing fit part of the first box body and other sub-boxes along the first direction is increased, so that the structural strength is improved, the sealing effect between other sub-boxes is improved, the multi-layer structure is formed in the manufacturing process in a bending sealing manner, the continuity of fibers among structures of different layers in the multi-layer structure is maintained, the manufacturing process of the multi-layer structure is simplified, the production cost is reduced, and the production efficiency is improved. In some embodiments, the edge seal comprises a plurality of continuous fiber composite layers, each of the continuous fiber composite layers comprising continuous fibers and a thermoplastic resin matrix connected to the continuous fibers. The composite material formed by the continuous fibers and the thermoplastic resin matrix has the characteristics of high strength, high rigidity and high toughness, is beneficial to improving the structural strength and structural rigidity of the edge seal, and is beneficial to improving the sealing effect of the edge seal and the connection stability with other sub-boxes. The resin matrix with thermoplasticity is used as a matrix material, so that the edge sealing can be softened and shaped in a heating mode for multiple times, and the workability of the edge sealing is improved. In some embodiments, the edge seal includes a sealing portion connected to the body, one side of the sealing portion along a first direction being in sealing engagement with the other sub-tank along the first direction, and an overlapping portion at least partially located on the other side of the sealing portion and forming the multi-layer structure together with the sealing portion. Therefore, adverse effects of the bent part of the edge sealing on sealing effects between other sub-boxes are reduced, and the sealing performance of the battery device is improved. In some embodiments, a portion of the continuous fibers in the seal edge are located in the seal portion and another portion are located in the overlap portion. In this way, the fibers in the sealing portion remain continuous with the fibers in the overlap portion, which is beneficial to improving the overall structural strength and structural rigidity of the seal. In some embodiments, the stacking portion fur