Battery shell and battery

Abstract

The utility model discloses a battery shell and a battery, and relates to the technical field of batteries. The battery shell comprises at least one top cover and a shell assembly, the at least one top cover is installed on the shell assembly and forms a closed space in an enclosing mode, the closed space is used for installing a battery cell, the top cover comprises a first plate body and at least one second plate body integrally formed with the first plate body, the first plate body and the second plate body are arranged in an included angle mode, and the top cover is formed by the second plate body integrally formed by the first plate body. The top cover and the shell assembly are assembled in a split mode, and the situation that the flatness requirement cannot be met due to the fact that the battery shell is formed through multiple times of bending and rolling forming is avoided. Therefore, the battery shell disclosed by the utility model can be made of a material with higher strength, the strength is ensured, the thickness of a plate can be greatly reduced, tabs can be formed on one side or two sides, the universality is strong, and the manufacturing process is simple.

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, and in particular to a battery casing and a battery. Background Technology

[0002] The existing battery top cover is a single flat plate structure. One method for forming the battery casing is using aluminum material through bending and welding. This process involves cutting, multiple bending, and welding to form the casing, requiring excess welding space (which needs to be cut off after welding). This method is complex, involves many steps, and has low material utilization, making efficient continuous production impossible. Another method is roll forming, which uses high-frequency welding and multiple rows of rollers working together to gradually form the shell from the rolled material, followed by high-frequency welding and finally rotary cutting. This method has high production costs, and burrs at the casing opening are difficult to remove automatically. Both forming methods result in casings with large areas of flatness that are difficult to meet requirements. Therefore, it is necessary to improve the top cover structure to solve these technical problems. Utility Model Content

[0003] In view of this, the present invention provides a battery casing and a battery to solve the problem that the flatness of a large surface of the casing is difficult to meet the requirements.

[0004] To solve the above-mentioned technical problems, the first technical solution adopted by this utility model is as follows:

[0005] A battery casing includes: at least one top cover and a casing assembly; the at least one top cover is mounted on the casing assembly and encloses a closed space for installing a battery cell; the top cover includes a first plate and at least one second plate integrally formed with the first plate, the first plate and the second plate being disposed at an angle.

[0006] In one embodiment, the number of top covers is one, and the two ends of the first plate are respectively provided with second plates, and the two second plates are arranged opposite to each other;

[0007] The housing assembly includes two opposing side plates and a bottom plate opposite to the first plate body, the bottom plate being connected between the two side plates;

[0008] The end of the second plate away from the first plate is connected to the bottom plate;

[0009] The top cover is located between the two side plates and is connected to the two side plates respectively.

[0010] In one embodiment, there are two top covers, one end of the first plate is provided with the second plate, and the two first plates are arranged opposite to each other, and the two second plates are arranged opposite to each other, and one of the first plates is connected to the other end of the other first plate through the second plate;

[0011] The housing assembly includes two oppositely arranged side plates;

[0012] The two top covers are located between the two side plates and are respectively connected to the two side plates.

[0013] In one embodiment, the number of the top cover is three or more, and the three or more top covers are connected end to end to form a ring structure;

[0014] The housing assembly includes two oppositely arranged side plates;

[0015] The ring structure is located between the two side plates and is connected to the two side plates respectively.

[0016] In one embodiment, the top cover is provided with a reinforcing structure.

[0017] In one embodiment, the battery housing further includes an explosion-proof valve, which is mounted on the top cover.

[0018] In one embodiment, the top cover is provided with pole post holes;

[0019] The explosion-proof valve and the pole hole are located on the same side or different sides of the same top cover.

[0020] In one embodiment, the top cover is provided with a liquid injection hole, and the liquid injection hole and the pole hole are located on the same side or different sides of the top cover;

[0021] The number of injection holes is one or more, and the positions of the injection holes are relative or misaligned.

[0022] In one embodiment, the top cover and the housing assembly are fixed together by welding to form a closed space.

[0023] To solve the above-mentioned technical problems, the second technical solution adopted by this utility model is as follows:

[0024] A battery includes a cell and a battery casing according to any of the above embodiments, wherein the cell is housed in the enclosed space.

[0025] Implementing the embodiments of this utility model will have at least the following beneficial effects:

[0026] The battery casing and battery of this invention feature a top cover mounted on a casing assembly, forming a closed space for installing battery cells. The top cover includes a first plate and at least one second plate integrally formed with the first plate. The first and second plates are angled together. The top cover, formed from the second plate integrally with the first plate, is then assembled with the casing assembly, achieving separate assembly. This avoids the need for multiple bending and roll forming processes, which can compromise flatness. Consequently, the battery casing of this invention can be made of high-strength materials, significantly reducing material thickness while maintaining strength. It allows for single-sided or double-sided tabs, offering high versatility and a simple manufacturing process. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is an exploded view of the battery casing structure in one embodiment;

[0029] Figure 2 for Figure 1 Schematic diagram of the structure of the top cover;

[0030] Figure 3 for Figure 2 Enlarged structural diagram of section A;

[0031] Figure 4 This is an exploded view of the battery casing structure in one embodiment.

[0032] in:

[0033] 1. Top cover; 11. First plate; 12. Second plate; 13. Reinforcing structure; 14. Positive electrode post hole; 15. Negative electrode post hole; 16. Liquid injection hole;

[0034] 2. Shell assembly; 21. Side plate; 22. Base plate;

[0035] 3. Explosion-proof valve; 100. Enclosed space. Detailed Implementation

[0036] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] like Figure 1 and Figure 3 As shown, the battery casing includes: at least one top cover 1 and a housing assembly 2; the at least one top cover 1 is mounted on the housing assembly 2 and encloses a closed space 100 for installing battery cells. The top cover 1 includes a first plate 11 and at least one second plate 12 integrally formed with the first plate 11, the first plate 11 and the second plate 12 being arranged at an angle. Specifically, the first plate 11 and the second plate 12 are arranged at a 90-degree angle.

[0040] It is understood that at least one top cover 1 of the battery casing is installed on the casing assembly 2, forming a closed space 100. The closed space 100 is used to install the battery cell. The top cover 1 includes a first plate 11 and at least one second plate 12 integrally formed with the first plate 11. The first plate 11 and the second plate 12 are set at an angle. The top cover 1, which is made by the second plate 12 integrally formed with the first plate 11, is then assembled with the casing assembly 2 to achieve separate assembly. This avoids the battery casing being made by multiple bending and roll forming, which would result in failure to meet the flatness requirements. As a result, the battery casing in this utility model can be made of a high-strength material. While ensuring strength, the thickness of the sheet material can be greatly reduced. It can achieve single-sided or double-sided electrode tabs, has strong versatility, and a simple manufacturing process.

[0041] It should be noted that the top cover 1 and the shell assembly 2 are fixedly connected by welding. This invention uses a separate assembly method for the two large flat side plates 21, which can meet the flatness requirements.

[0042] In this embodiment, the assembly of the top cover 1 and the housing assembly 2 can be implemented in several ways:

[0043] In one implementation, such as Figure 4 As shown, there is one top cover 1. A second plate 12 is provided at each end of the first plate 11, and the two second plates 12 are arranged opposite each other. The housing assembly 2 includes two oppositely arranged side plates 21 and a bottom plate 22 opposite to the first plate 11, with the bottom plate 22 connected between the two side plates 21. The end of the second plate 12 away from the first plate 11 is connected to the bottom plate 22. The top cover 1 is located between the two side plates 21 and connected to each of them. Specifically, the top cover 1 is U-shaped. By providing a top cover 1 made of an integrally formed first plate 11 and two second plates 12, and then connecting the top cover 1 to the bottom plate 22 and the two side plates 21, separate assembly can be achieved, thus ensuring the flatness requirements of the side plates 21. The two side plates 21 and the bottom plate 22 are fixedly connected by welding, and the two second plates 12 of the top cover 1 are welded to the bottom plate 22 and the two side plates 21. This allows the top cover 1 and the housing assembly 2 to be assembled separately, ensuring the flatness requirements of the two large flat side plates 21.

[0044] In another implementation, such as Figure 1 As shown, there are two top covers 1. A second plate 12 is provided at one end of a first plate 11, and the two first plates 11 are arranged opposite each other. The two second plates 12 are also arranged opposite each other. One of the first plates 11 is connected to the other end of the other first plate 11 through the second plate 12. The housing assembly 2 includes two oppositely arranged side plates 21. The two top covers 1 are located between the two side plates 21 and are respectively connected to the two side plates 21. Specifically, each top cover 1 is L-shaped. Each top cover 1 is made by setting an integrally formed first plate 11 and second plate 12. The two top covers 1 are arranged opposite each other and welded together. The two top covers 1 are then welded to the two side plates 21, which can achieve separate assembly, thereby ensuring the flatness requirements of the side plates 21.

[0045] In another embodiment, the number of top covers 1 is three or more, and the three or more top covers 1 are connected end to end to form a ring structure; the shell assembly 2 includes two oppositely arranged side plates 21; the ring structure is located between the two side plates 21 and is connected to the two side plates 21 respectively. Specifically, one of the first plates 11 is welded to another first plate 11 or second plate 12 through a second plate 12, and the other first plate 11 is welded to the next first plate 11 or second plate 12 through a second plate 12 to achieve the ring structure. The ring structure is then welded to the two side plates 21, which can achieve separate assembly, thereby ensuring the flatness requirements of the side plates 21.

[0046] In one embodiment of the battery casing, the top cover 1 is provided with a reinforcing structure 13. By providing the reinforcing structure 13, the structural strength of the top cover 1 can be enhanced, and it can also have a certain load-bearing capacity when the battery casing is installed on the vehicle chassis. In addition, it can be directly positioned and connected when assembling the side plate 21 or the bottom plate 22.

[0047] Specifically, the reinforcing structure 13 is a protrusion that extends outward from the side of the top cover 1 away from the enclosed space 100. At least one of the first plate 11 and the second plate 12 is provided with a protrusion.

[0048] Of course, in other embodiments, the reinforcing structure 13 can also be a reinforcing rib.

[0049] In one embodiment of the battery casing, the battery casing further includes an explosion-proof valve 3, which is mounted on the top cover 1. By providing the explosion-proof valve 3, it is possible to better guide the ejection of debris in the event of thermal runaway.

[0050] In this embodiment, the top cover 1 is provided with two electrode post holes, namely a positive electrode post hole 14 and a negative electrode post hole 15, which are located on the same side or different sides of the top cover 1. Thus, by providing the positive electrode post hole 14 and the negative electrode post hole 15, a positive electrode post and a negative electrode post can be installed.

[0051] Furthermore, the positive terminal hole 14 and the negative terminal hole 15 can be located at any position on the top cover 1. In practice, the positive terminal hole 14 and the negative terminal hole 15 can be on the same side or different sides of the top cover 1, which facilitates the processing of the top cover 1.

[0052] The explosion-proof valve 3 and the electrode hole are located on the same side or different sides of the same top cover 1. When the battery cell malfunctions, the explosion-proof valve 3 can burst, and the ejected debris will not cause a short circuit between the electrode and other metal parts.

[0053] In one embodiment of the battery casing, the top cover 1 is provided with an injection hole 16, which is located on the same side or different sides of the top cover 1, along with the terminal hole. This allows for convenient injection of electrolyte into the enclosed space 100 via the injection hole 16.

[0054] In this embodiment, the injection holes 16 can be located at any position on the top cover 1, and there can be multiple injection holes, with the positions of the multiple injection holes being relative or staggered. This allows electrolyte to be added at different positions on the top cover 1. During implementation, the injection holes 16 and the electrode holes can be on the same side or different sides of the top cover 1, facilitating the addition of electrolyte.

[0055] In one embodiment of the battery casing, the battery casing further includes a positive terminal post and a first sealing ring. The positive terminal post passes through a positive terminal post hole 14, and the first sealing ring is fitted onto the positive terminal post and clamped between the top cover 1 and the positive terminal post. This seals the gap between the positive terminal post and the positive terminal post hole 14. By providing the first sealing ring, the connection between the positive terminal post and the positive terminal post hole 14 can be sealed, preventing the entry of external substances.

[0056] The battery casing also includes a negative terminal post and a second sealing ring. The negative terminal post passes through the negative terminal post hole 15, and the second sealing ring is fitted onto the negative terminal post and clamped between the top cover 1 and the negative terminal post. This seals the gap between the negative terminal post and the negative terminal post hole 15. By providing the second sealing ring, the connection between the negative terminal post and the negative terminal post hole 15 can be sealed, preventing the entry of external substances.

[0057] In this embodiment, the battery casing also includes a positive electrode post, a first upper plastic and a first lower plastic, the first upper plastic and the first lower plastic being located on opposite sides of the first plate 11 or the second plate 12 corresponding to the positive electrode post hole 14.

[0058] The battery casing also includes a negative terminal post, a second lower plastic and a second upper plastic, with the second upper plastic and the second lower plastic located on opposite sides of the first plate 11 or the second plate 12 corresponding to the negative terminal post hole 15.

[0059] This utility model also provides a battery, including a battery cell and a battery casing of any of the above embodiments, wherein the battery cell is housed in an enclosed space 100.

[0060] It is understood that the battery of this utility model uses the aforementioned battery casing, such that at least one top cover 1 of the battery casing is installed on the casing assembly 2, forming a closed space 100. The closed space 100 is used to install the battery cell. The top cover 1 includes a first plate 11 and at least one second plate 12 integrally formed with the first plate 11. The first plate 11 and the second plate 12 are set at an angle. The top cover 1, formed by the second plate 12 integrally formed with the first plate 11, is then assembled with the casing assembly 2, achieving separate assembly. This avoids the battery casing being made through multiple bending and roll forming, which would result in failure to meet the flatness requirements. As a result, the battery casing of this utility model can be made of a high-strength material, which can greatly reduce the thickness of the sheet material while ensuring strength. It can achieve single-sided or double-sided electrode tabs, has strong versatility, and a simple manufacturing process.

[0061] In this embodiment, the battery casing described in the previous embodiment is applied to the battery. The main structure of the battery casing can be composed of a top cover 1 and a housing assembly 2. The flatness can easily meet the requirements, solving the problem that the flatness of the large surface of the battery casing is difficult to meet the requirements. In addition, in this embodiment, the top cover 1 and the housing assembly 2 are made of alloy materials. The thickness of existing aluminum materials is 0.3mm or more, while the alloy material used in this embodiment can achieve a thickness of 0.015mm and has three times the strength of aluminum materials. In addition, it can also produce electrode tabs on one side or opposite sides, which is highly versatile and simple to manufacture.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery housing, characterized by The battery shell comprises: at least one top cover and a shell assembly; the at least one top cover is mounted on the shell assembly and encloses an internal closed space for mounting an electric core; the top cover comprises a first plate body and at least one second plate body integrally formed with the first plate body; the first plate body and the second plate body are arranged at an angle.

2. The battery case of claim 1, wherein, The number of the top cover is one; the two ends of the first plate body are respectively provided with the second plate body; and the two second plate bodies are oppositely arranged. The shell assembly comprises two oppositely arranged side plates and a bottom plate oppositely arranged with the first plate body; the bottom plate is connected between the two side plates. The end of the second plate body away from the first plate body is connected with the bottom plate. The top cover is located between the two side plates and is respectively connected with the two side plates.

3. The battery case of claim 1, wherein, The number of the top cover is two; one end of the first plate body is provided with the second plate body; the two first plate bodies are oppositely arranged; and the two second plate bodies are oppositely arranged; one of the first plate bodies is connected with the other end of the other first plate body through the second plate body. The shell assembly comprises two oppositely arranged side plates. The two top covers are located between the two side plates and are respectively connected with the two side plates.

4. The battery case of claim 1, wherein, The number of the top cover is more than three; and the more than three top covers are connected in a ring structure. The shell assembly comprises two oppositely arranged side plates. The ring structure is located between the two side plates and is respectively connected with the two side plates.

5. The battery case according to any one of claims 1 to 4, characterized by, The top cover is provided with a reinforcing structure.

6. The battery case of claim 1, wherein, The battery shell further comprises an explosion-proof valve mounted on the top cover.

7. The battery case of claim 6, wherein, The top cover is provided with a pole hole. The explosion-proof valve and the pole hole are arranged on the same side or different sides of the same top cover.

8. The battery case of claim 7, wherein, The top cover is provided with a liquid injection hole; the liquid injection hole and the pole hole are arranged on the same side or different sides of the same top cover. The number of the liquid injection hole is more than one; and the positions of the liquid injection holes are opposite or staggered.

9. The battery case of claim 1, wherein, The top cover and the shell assembly are fixed by welding to form the closed space.

10. A battery, characterized by The battery shell comprises an electric core and a battery shell as claimed in any one of claims 1 to 9; and the electric core is accommodated in the closed space.

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