Shell for battery, battery, battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a shell for a battery, which is characterized by comprising a plurality of side walls formed by bending plates, a battery accommodating cavity is defined by the plurality of side walls, and the battery accommodating cavity is suitable for accommodating a battery main body; the plurality of side walls comprise a first side wall formed by bending the head end of the plate and a connecting side wall formed by bending the tail end of the plate; and the connecting side wall and the first side wall are welded to form a welding seam so as to form a large surface of the shell. A strategy of transferring a shell welding seam to a large surface is adopted, so that the influence of shell deformation caused by welding stress on a subsequent shell cover welding procedure during shell manufacturing is reduced; gap transfer caused by size fluctuation of supplied materials is evenly distributed to the whole welding seam, the assembling difficulty of a thin shell can be effectively overcome, the welding yield of the thin shell is improved, meanwhile, the structure of the boss of the cover plate is changed, spreading of a molten pool during shell cover welding is facilitated, the air tightness of the welding seam is improved, and then the overall strength and air tightness of the battery shell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery shell, a battery, a battery device and an electrical device. Background Art

[0002] During the production of battery shells, there will be a certain degree of large dimensional fluctuations due to welding deformation of the shell weld seams. At the same time, large gaps may be generated during the welding and assembly of the shell cover. When the shell structure is thin, this gap will cause weld holes, lack of fusion and other problems. Utility Model Content

[0003] The technical problem to be solved by the present invention is that during the production of the battery shell, there will be a certain degree of dimensional fluctuation due to the welding deformation of the shell weld seam. At the same time, a large gap may be generated during the welding and assembly of the shell cover. When the shell structure is thin, this gap will cause problems such as weld holes and lack of fusion.

[0004] In order to solve the above technical problems, on the one hand, the present disclosure provides a shell for a battery, characterized in that it includes multiple side walls formed by bending a plate, and the multiple side walls enclose a battery accommodating cavity, and the battery accommodating cavity is suitable for accommodating a battery body; the multiple side walls include a first side wall formed by bending from the head end of the plate and a connecting side wall formed by bending from the end of the plate; the connecting side wall and the first side wall are welded to form a weld to form the large surface of the shell.

[0005] As an optional technical solution of the present invention, the connecting side wall is butted against a side adjacent to the first side wall and welded to form the weld.

[0006] As an optional technical solution of the present invention, the connecting side wall overlaps with a side adjacent to the first side wall and is welded at the overlapping portion to form the weld.

[0007] As an optional technical solution of the present invention, the shell includes a second side wall, a third side wall, and a fourth side wall connected to the first side wall in sequence, the fourth side wall is connected to the connecting side wall, the second side wall and the fourth side wall are narrow surfaces and are arranged opposite to each other, and the third side wall is arranged opposite to the large surface.

[0008] As an optional technical solution of the present invention, the material of the shell is one of metal aluminum or steel.

[0009] As an optional technical solution of the present invention, the weld is linear.

[0010] As an optional technical solution of the present invention, the welding of the weld seam adopts one of laser welding or high-frequency welding processes.

[0011] As an optional technical solution of the present invention, the distance from the end of the first side wall to the weld along the first direction is w1, the distance from the end of the connecting side wall to the weld along the first direction is w2, and the length of the large surface along the first direction is W; W, w1 and w2 satisfy: w1+w2=W; w1 / w2=W / w1.

[0012] On the other hand, as an optional technical solution of the present invention, the present disclosure further provides a battery, comprising the battery body and the above-mentioned shell, wherein the battery body is arranged in the accommodating cavity.

[0013] As an optional technical solution of the present invention, the battery further includes at least one cover plate, at least one end of the shell is provided with an opening, and the cover plate closes the opening.

[0014] As an optional technical solution of the present invention, the cover plate includes a boss and a cover body, the boss and the cover body are connected along the second direction, and the projection of the cover body in the second direction is within the projection of the boss in the second direction.

[0015] As an optional technical solution of the present invention, rounded corners are provided at both ends of the boss along the first direction, the radius of the rounded corners is R, the size of the boss along the second direction is t, and R and t satisfy: R≤t.

[0016] As an optional technical solution of the present invention, a pole is provided on the cover plate.

[0017] As an optional technical solution of the present invention, the material of the pole is one of metal aluminum or metal copper.

[0018] As an optional technical solution of the present invention, a shell-cover weld is provided at the connection between the cover plate and the shell for welding the cover plate and the shell.

[0019] As an optional technical solution of the present invention, the shell cover weld and the shell weld have a connection, and the connection is welded.

[0020] On the other hand, as an optional technical solution of the present invention, the present disclosure also provides a battery device, including the above-mentioned battery.

[0021] On the other hand, as an optional technical solution of the present invention, the present disclosure further provides an electrical device, including the above-mentioned battery device or the above-mentioned battery.

[0022] The beneficial effects of the present invention are as follows: a shell for a battery is provided, characterized in that it includes a plurality of side walls formed by bending a plate, the plurality of side walls enclose a battery accommodating cavity, and the battery accommodating cavity is suitable for accommodating a battery body; the plurality of side walls include a first side wall formed by bending from the head end of the plate and a connecting side wall formed by bending from the tail end of the plate; the connecting side wall and the first side wall are welded to form a weld to form the large surface of the shell. A strategy of transferring the shell weld to the large surface is adopted to reduce the influence of shell deformation caused by welding stress during shell production on the subsequent shell cover welding process; the gap transfer caused by fluctuations in the size of the incoming material is evenly distributed to the entire weld, which can effectively overcome the assembly difficulties of thin shells and improve the welding yield of thin shells. At the same time, the structure of the cover boss is changed, which is conducive to the spread of the molten pool during shell cover welding, improves the air tightness of the weld, and thus improves the overall strength and air tightness of the battery shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is an exploded view of the shell of the utility model;

[0025] Figure 2 It is a schematic diagram of the weld position of the shell of the utility model.

[0026] Figure 3 It is a schematic diagram of the cover plate of the present utility model;

[0027] The reference numerals in the specification are as follows:

[0028] 1. Shell; 11. First side wall; 12. Second side wall; 13. Third side wall; 14. Fourth side wall; 15. Connecting side wall; 16. Weld; 2. Cover; 21. Pole; 22. Boss; 23. Cover; 3. Shell cover weld. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0030] The following describes in detail a battery housing, a battery, a battery device and an electrical device according to the present invention.

[0031] In one embodiment of the present disclosure, Figure 1-3 The present disclosure provides a battery housing 1, characterized by comprising a plurality of side walls formed by bending a plate material, the plurality of side walls enclosing a battery receiving cavity suitable for accommodating a battery body; the plurality of side walls include a first side wall 11 formed by bending from the front end of the plate material, and a connecting side wall 15 formed by bending from the rear end of the plate material; the connecting side wall 15 is welded to the first side wall 11 to form a weld 16 to form the housing's main surface. Specifically, the main surface can be the largest surface or the larger surface, and the first side wall 11 and the connecting side wall 14 can be rectangular.

[0032] In some embodiments, the connecting side wall 15 is butted against a side adjacent to the first side wall 11 and welded to form the weld 16 .

[0033] In other embodiments, the connecting side wall 15 overlaps with a side adjacent to the first side wall 11 and is welded at the overlapping portion to form the weld 16 .

[0034] In some embodiments, the housing 1 includes a second side wall 12, a third side wall 13, and a fourth side wall 14, which are sequentially connected to the first side wall 11. The fourth side wall 14 is connected to the connecting side wall 15. The second side wall 12 and the fourth side wall 14 are narrow sides and are arranged opposite each other. The third side wall 13 is arranged opposite the large side. Specifically, the first side wall 11, the second side wall 12, the third side wall 13, the fourth side wall 14, and the connecting side wall 15 can be in a matrix shape, etc., and the cross-section of the accommodating cavity enclosed by the first side wall 11, the second side wall 12, the third side wall 13, the fourth side wall 14, and the connecting side wall 15 can be rectangular.

[0035] In some embodiments, the housing 1 is made of aluminum or steel.

[0036] In some embodiments, the weld 16 is linear.

[0037] In some embodiments, the weld 16 is welded using a laser welding process or a high frequency welding process.

[0038] In some embodiments, the distance from the end of the first side wall 11 to the weld 16 along the first direction X is w1, the distance from the end of the connecting side wall 15 to the weld 16 along the first direction X is w2, and the length of the large surface along the first direction X is W; W, w1, and w2 satisfy the following: w1+w2=W; w1 / w2=W / w1. Specifically, the first direction X extends along the edge of the large surface of the housing where it connects to the housing opening.

[0039] In some embodiments, the present disclosure further provides a battery, comprising a battery body and the above-mentioned housing 1, wherein the battery body is disposed in the accommodating cavity.

[0040] In some embodiments, the battery further includes at least one cover plate 2. An opening is provided at at least one end of the housing 1, and the cover plate 2 seals the opening. Specifically, there may be two cover plates, one for the positive electrode and one for the negative electrode, or there may be a single cover plate that serves as a spacer between the positive and negative electrode covers.

[0041] In some embodiments, the cover plate 2 includes a boss 22 and a cover body 23, wherein the boss 22 and the cover body 23 are connected along a second direction Y, and the projection of the cover body 23 in the second direction Y is within the projection of the boss 22 in the second direction Y. Specifically, the second direction Y extends along the direction of the two openings, and the first direction X and the second direction Y are not parallel and may be perpendicular.

[0042] In some embodiments, rounded corners are provided at both ends of the boss 22 along the first direction X, and the radius of the rounded corners is R. The dimension of the boss 22 along the second direction Y is t, and R and t satisfy: R≤t.

[0043] In some embodiments, a pole 21 is provided on the cover plate 2. Specifically, the pole can be a positive pole or a negative pole.

[0044] In some embodiments, the material of the pole 21 is aluminum or copper.

[0045] In some embodiments, a shell cover weld 3 is provided at the connection between the cover plate 2 and the shell 1 for welding the cover plate 2 and the shell 1. Specifically, the shell cover weld 3 may be rectangular in shape.

[0046] In some embodiments, the shell cover weld 3 and the weld 16 of the shell 1 have a connection, and the connection is welded.

[0047] In some embodiments, the present disclosure further provides a battery device comprising the aforementioned battery. Specifically, the battery device may be a battery assembly or a battery pack.

[0048] In some embodiments, the present disclosure further provides an electrical device comprising the aforementioned battery device or battery. Specifically, the battery device is disposed within the electrical device to provide power for the operation of the electrical device. The electrical device may be a new energy vehicle, a ship, or other electrical device.

[0049] The present utility model relates to the field of battery technology and provides a battery shell 1, characterized in that it includes a plurality of side walls formed by bending a plate, the plurality of side walls enclosing a battery accommodating cavity, and the battery accommodating cavity is suitable for accommodating a battery body; the plurality of side walls include a first side wall 11 formed by bending from the front end of the plate and a connecting side wall 15 formed by bending from the rear end of the plate; the connecting side wall and the first side wall are welded to form a weld 16 to form the large surface of the shell 1. A strategy of transferring the shell weld to the large surface is adopted to reduce the impact of shell deformation caused by welding stress during shell production on the subsequent shell cover welding process; the gap transfer caused by fluctuations in the size of the incoming material is evenly distributed over the entire weld, which can effectively overcome the assembly difficulties of thin shells and improve the welding yield of thin shells. At the same time, the structure of the cover plate boss is changed, which is conducive to the spread of the molten pool during shell cover welding, improves the airtightness of the weld, and thus improves the overall strength and airtightness of the battery shell.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0053] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0055] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery housing, characterized in that: It includes a plurality of side walls formed by bending a plate, wherein the plurality of side walls enclose a battery receiving cavity, and the battery receiving cavity is suitable for receiving a battery body; The multiple side walls include a first side wall formed by bending the head end of the plate and a connecting side wall formed by bending the tail end of the plate; the connecting side wall and the first side wall are welded to form a weld to form the large surface of the shell.

2. The housing according to claim 1, wherein: The connecting side wall is butted against a side adjacent to the first side wall and welded to form the weld.

3. The housing according to claim 1, wherein: The connecting side wall overlaps with a side adjacent to the first side wall and is welded at the overlapping position to form the weld.

4. The housing according to claim 1, wherein: The shell includes a second side wall, a third side wall, and a fourth side wall connected to the first side wall in sequence, the fourth side wall is connected to the connecting side wall, the second side wall and the fourth side wall are narrow surfaces and are arranged opposite to each other, and the third side wall is arranged opposite to the large surface.

5. The housing according to claim 1, wherein: The material of the shell is metal aluminum or steel.

6. The housing according to claim 1, wherein: The weld is straight.

7. The housing according to claim 1, wherein: The welding of the weld seam adopts one of laser welding and high frequency welding processes.

8. The housing according to any one of claims 1 to 7, wherein: The distance from the end of the first side wall to the weld along the first direction is w1, the distance from the end of the connecting side wall to the weld along the first direction is w2, and the length of the large surface along the first direction is W; W, w1 and w2 satisfy: w1+w2=W; w1 / w2=W / w1.

9. A battery, characterized in that: The battery comprises the shell according to any one of claims 1 to 8 and the battery body, wherein the battery body is arranged in the accommodating cavity.

10. The battery according to claim 9, characterized in that The battery further includes at least one cover plate. At least one end of the shell is provided with an opening, and the cover plate closes the opening.

11. The battery according to claim 10, characterized in that The cover plate includes a boss and a cover body, the boss and the cover body are connected along the second direction, and the projection of the cover body in the second direction is within the projection of the boss in the second direction.

12. The battery according to claim 11, characterized in that: Rounded corners are provided at both ends of the boss along the first direction, and the radius of the rounded corners is R. The dimension of the boss along the second direction is t, and R and t satisfy: R≤t.

13. The battery according to claim 10, characterized in that The cover plate is provided with a pole.

14. The battery according to claim 13, characterized in that The pole is made of aluminum or copper.

15. The battery according to claim 10, characterized in that A shell-cover weld is provided at the connection between the cover plate and the shell for welding the cover plate and the shell.

16. The battery according to claim 15, characterized in that The shell cover weld and the shell body weld have a connection, and the connection is welded.

17. A battery device, characterized in that: A battery comprising the battery according to any one of claims 9 to 16.

18. An electrical device, characterized in that: Comprising the battery device according to claim 17, or the battery according to any one of claims 9 to 16.

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