Battery cell shell, battery cell and vehicle

Abstract

The utility model relates to a battery cell shell, a battery cell and a vehicle, the battery cell shell comprises a shell body, the shell body is formed by welding plates, the shell body is provided with at least one welding seam, and the welding seam is constructed to be in a bent line shape. The weld joint of the shell body is of a bent line shape, compared with a linear weld joint in the related technology, the stress points of the weld joint are not located on the same straight line, stress is dispersed, meanwhile, the bent line-shaped weld joint is longer in welding length, and the weld joint is not prone to cracking and deformation when impacted by external force.

Description

Technical Field

[0001] The present disclosure relates to the technical field of housing processing, and specifically, to an electric cell housing, an electric cell, and a vehicle. Background Art

[0002] In the design and manufacturing process of the housing, due to lightweight design, the housing is made lighter and thinner. Most of the welds of the housing in the related art are straight lines. However, in the production process of the electric cell, there are multiple operations of evacuating the inside of the electric cell to vacuum and filling it with positive pressure, resulting in a process of multiple repeated stress and strain in the electric cell housing. Especially at the weld, repeated bending will cause the weld to fail and affect the safety performance of the product. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide an electric cell housing, an electric cell, and a vehicle, which can solve the above technical problems.

[0004] To achieve the above purpose, the present disclosure provides an electric cell housing, including: a housing body, the housing body is formed by welding a sheet, and there is at least one weld on the housing body, and the weld is configured as a curved line shape.

[0005] Optionally, the weld is configured as a wavy curve extending along the length direction of the housing body.

[0006] Optionally, the housing body is configured as a cylindrical structure formed by bending a piece of the sheet.

[0007] Optionally, the opposite sides of the sheet have connecting edges, and the edges of the connecting edges are configured as curved line shapes, and the two connecting edges are butted to form the weld.

[0008] Optionally, the cross-section of the cylindrical structure is configured as a rectangle.

[0009] Optionally, the two connecting edges are located in the same plane.

[0010] Optionally, the sheet is configured as an aluminum sheet.

[0011] Optionally, the distance from the peak to the valley of the wavy curve is A, and A = 5 mm - 25 mm.

[0012] Optionally, the arc radius of the wavy curve is R, and R = 3 mm - 50 mm.

[0013] The second purpose of the present disclosure is to provide an electric cell, including: the above-mentioned electric cell housing.

[0014] The third purpose of the present disclosure is to provide a vehicle, including: the above-mentioned electric cell.

[0015] With the above technical solution, in the battery cell housing provided in the present disclosure, the weld of the housing body is configured as a curved line shape. Compared with the straight weld in the related art, the stress application points of the weld in the present disclosure are not on a straight line, so that the stress is dispersed. At the same time, the welding length of the curved line-shaped weld is longer, and it is not easy to crack and deform when subjected to external force impact.

[0016] Other features and advantages of the present disclosure will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0018] Figure 1 is a schematic structural view of the housing body in the present disclosure;

[0019] Figure 2 is a side view of the housing body in the present disclosure;

[0020] Figure 3 is a developed view of the housing body in the present disclosure.

[0021] DESCRIPTION OF THE REFERENCE NUMERALS

[0022] 1. Housing body; 11. Connecting edge; 12. Plate; 2. Weld. SPECIFIC IMPLEMENTATION

[0023] The following will describe in detail the specific implementation of the present disclosure with reference to the drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0024] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" refer to the inside and outside relative to the contour of the component or structure itself. In addition, in the description with reference to the drawings, the same reference numerals in different drawings represent the same elements.

[0025] As Figures 1 - 3 shown, the present disclosure provides a battery cell housing, including: a housing body 1 formed by welding a plate 12, and at least one weld 2 is provided on the housing body 1, and the weld 2 is configured as a curved line shape.

[0026] Through the above technical solution, in the battery cell housing provided in the present disclosure, the weld seam 2 of the housing body 1 is configured as a curved line shape. Compared with the straight weld seam in the related art, the stress application points of the weld seam 2 in the present disclosure are not on a straight line, so that the stress is dispersed. At the same time, the welding length of the curved line-shaped weld seam 2 is longer, and it is not easy to crack and deform when subjected to external force impact.

[0027] As an alternative implementation, as Figures 1 - 2 shown, the weld seam 2 is configured as a wavy curve extending along the length direction of the housing body 1. The wavy curve is composed of multiple circular arc curves, and there will be no welding dead corners, making the welding points smoother. Of course, in other implementations, the weld seam 2 can be configured as any suitable curved line shape, such as a triangular sawtooth shape, a rectangular sawtooth shape, etc.

[0028] As an alternative implementation, as Figure 3 shown, the housing body 1 is configured as a cylindrical structure formed by bending a piece of plate 12. A piece of plate 12 is formed by stamping and has only one weld seam 2, which is convenient for processing and has higher strength. In other implementations, the housing body 1 can also be formed by bending and welding two or more pieces of plate 12.

[0029] Optionally, as Figure 3 shown, the opposite sides of the plate 12 have connecting edges 11. The edges of the connecting edges 11 are configured as curved line shapes. The two connecting edges 11 are butted to form the weld seam 2. The weld seam 2 is formed by butting the two connecting edges 11 with curved line-shaped edges. The edges of the two connecting edges 11 match and engage with each other and limit each other. In this way, the connection strength of the housing body 1 is also enhanced, and the risk of dislocation of the two connecting edges 11 along the length direction is reduced.

[0030] Optionally, as Figure 1 shown, the cross-section of the cylindrical structure is configured as a rectangle. The weld seam 2 in the present disclosure is more suitable for planar welding. If the cross-section of the cylindrical structure is circular, there will be bending stress on the curved side surface of the circle, which is likely to cause the weld seam 2 to crack.

[0031] Optionally, as Figures 1 - 2 shown, the two connecting edges 11 are located in the same plane, that is, the two connecting edges 11 are located in the same side plate to form planar welding. In this way, the welding is more firm. For example, the weld seam 2 is located at the center of the side plate, so that the force is more uniform, and the two connecting edges 11 are butted against each other to make the two connecting edges 11 flush, rather than being welded together in an overlapping manner, so as to avoid increasing the thickness of the housing body 1.

[0032] Optionally, the plate 12 can be made of any suitable material. Exemplarily, in the present disclosure, the plate 12 is configured as an aluminum plate. The aluminum plate has good plasticity, can be processed into various profiles, has a low density, is light in weight, has good ductility, and can be made thinner.

[0033] As an alternative embodiment, as Figure 2 shown, the distance from the peak to the trough of the wavy curve is A, and A = 5 mm - 25 mm, that is, the width of the weld 2 is A. The width of the weld 2 is less than the width of the side plate of the housing body 1 provided with the weld 2. The size of the wavy curve can be selected according to the model of the battery cell. For example, A can be 5 mm, 10 mm, or 25 mm, etc.

[0034] As an alternative embodiment, as Figure 2 shown, the radius of the arc of the wavy curve is R, and R = 3 mm - 50 mm. The wavy curve is composed of a plurality of circular arc curves. By restricting the radius of the arc, the number of circular arc curves is restricted. The size of the radius of the arc can be set according to the model of the battery cell. For example, R can be 3 mm, 10 mm, 20 mm, or 50 mm, etc.

[0035] The second object of the present disclosure is to provide a battery cell, including: the above-mentioned battery cell housing, wherein the stress application points of the weld 2 of the battery cell housing are not on a straight line, so that the stress is dispersed. At the same time, the welded length of the curved linear weld 2 is longer, and it is not easy to crack and deform when subjected to external impact.

[0036] The third object of the present disclosure is to provide a vehicle, including: the above-mentioned battery cell, which is more stable and makes the vehicle safer.

[0037] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0038] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure does not separately describe various possible combination methods.

[0039] In addition, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery cell housing, characterized in that, Comprising: A housing body formed by welding a sheet metal. The housing body has at least one weld seam, and the weld seam is configured as a curved linear shape.

2. The cell housing according to claim 1, characterized in that, The weld seam is configured as a wavy curve extending along the length direction of the housing body.

3. The cell housing according to claim 1 or 2, characterized in that, The housing body is configured as a cylindrical structure formed by bending a piece of the sheet metal.

4. The cell housing according to claim 3, wherein The opposite sides of the sheet metal have connecting edges, and the edges of the connecting edges are configured as curved linear shapes. The two connecting edges are butted to form the weld seam.

5. The cell housing according to claim 4, characterized in that, The cross-section of the cylindrical structure is configured as a rectangle.

6. The cell housing according to claim 5, characterized in that, The two connecting edges are located in the same plane.

7. The cell housing according to claim 3, wherein The sheet metal is configured as an aluminum sheet metal.

8. The cell housing according to claim 2, characterized in that, The distance from the peak to the trough of the wavy curve is A, and A = 5mm - 25mm.

9. The cell housing according to claim 2, wherein, The arc radius of the wavy curve is R, and R = 3mm - 50mm.

10. A battery cell, characterized in that, Comprising: The battery cell housing according to any one of claims 1-9.

11. A vehicle, characterized in that, Comprising: The battery cell according to claim 10.

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