Battery shell and battery

Abstract

The embodiment of the utility model discloses a battery shell and a battery, and relates to the technical field of batteries and energy storage. The battery shell comprises a shell body, a positive pole top cover assembly and a negative pole top cover assembly, the positive pole top cover assembly, the negative pole top cover assembly and the shell body define a closed space, the closed space is used for installing a battery cell, the positive pole top cover assembly comprises a first cover plate and at least one first pole column, and the first cover plate and the first pole column are integrally formed; the negative top cover assembly comprises a second cover plate and at least one second pole, the second cover plate and the second pole are integrally formed, the first cover plate and the first pole are integrated, and the second cover plate and the second pole are integrated, so that the assembly of the positive top cover assembly, the negative top cover assembly and the shell is simplified, parts and assembly procedures are reduced, and the assembly efficiency is improved; the manufacturing cost is reduced. In addition, the integrated positive and negative top cover assemblies are assembled with the shell, so that the space utilization rate in the shell can be improved, the thickness of the positive and negative top cover assemblies is reduced, and the weight is reduced.

Description

Technical Field

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

[0002] Currently, new energy battery casing structures include cylindrical batteries, prismatic batteries, and pouch batteries. A typical battery casing structure usually consists of a top cover assembly, a housing, and a protective film. Housings are classified by material as aluminum or steel, and also by whether they have a dual-channel or single-channel design. Steel housings offer good mechanical strength and impact resistance, effectively protecting the battery components; however, the overall battery weight is relatively heavy, increasing the vehicle's overall weight and reducing driving range. Most battery top cover assemblies on the market are currently assembled from multiple parts, resulting in too many components, a cumbersome assembly process, and limited energy density. Utility Model Content

[0003] Therefore, it is necessary to provide a battery casing and battery to solve the technical problems of most battery top cover assemblies on the market being assembled from multiple parts, resulting in too many parts, complicated assembly processes, and limited energy density.

[0004] In a first aspect, the present invention provides a battery casing, comprising: a casing, a positive electrode top cover assembly, and a negative electrode top cover assembly, wherein the positive electrode top cover assembly and the negative electrode top cover assembly, together with the casing, form a closed space, the closed space being used to install a battery cell, the positive electrode top cover assembly comprising a first cover plate and at least one first electrode post, the first cover plate being integrally formed with the first electrode post, and the negative electrode top cover assembly comprising a second cover plate and at least one second electrode post, the second cover plate being integrally formed with the second electrode post.

[0005] In one embodiment, a plurality of first pole posts are provided and spaced apart along the extension direction of the first cover plate, and a plurality of second pole posts are provided and spaced apart along the extension direction of the second cover plate.

[0006] In one embodiment, the positive electrode top cover assembly further includes a first plastic part and a metal sheet, wherein the first cover plate is insulated and sealed to the metal sheet through the first plastic part.

[0007] In one embodiment, the positive electrode top cover assembly further includes an insulating element, through which the first cover plate is connected to the housing.

[0008] In one embodiment, a conductive agent is added to the first plastic part.

[0009] In one embodiment, the negative electrode top cover assembly further includes a second plastic component, the second cover being insulated and sealed from the housing via the second plastic component.

[0010] In one embodiment, the housing is provided with a protrusion that is received in the enclosed space, and the second cover plate abuts the second plastic part against the protrusion.

[0011] In one embodiment, the housing is further provided with a folding portion, and the second plastic part is clamped between the folding portion and the second cover plate.

[0012] In one embodiment, the battery housing further includes at least one explosion-proof valve, which is installed in the housing and is used to eject material after an explosion.

[0013] Secondly, the present invention also provides a battery, the battery comprising a cell and a battery casing of any of the above embodiments, wherein the cell is installed within the enclosed space of the battery casing.

[0014] Implementing the embodiments of this utility model will have the following beneficial effects:

[0015] The battery casing and battery of this invention feature a positive electrode top cover assembly and a negative electrode top cover assembly that, together with the casing, form a closed space for installing battery cells. The positive electrode top cover assembly includes a first cover plate and at least one first terminal post, which are integrally formed. The negative electrode top cover assembly includes a second cover plate and at least one second terminal post, which are integrally formed. The integration of the first cover plate and the first terminal post, as well as the integration of the second cover plate and the second terminal post, simplifies the assembly of the positive and negative electrode top cover assemblies with the casing, reduces the number of parts and assembly steps, improves assembly efficiency, and lowers manufacturing costs. Furthermore, the integrated positive and negative electrode top cover assemblies with the casing improves the internal space utilization of the casing, reduces the thickness of the positive and negative top cover assemblies, and reduces weight. Attached Figure Description

[0016] 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.

[0017] in:

[0018] Figure 1 This is an isometric view of the battery casing in one embodiment.

[0019] Figure 2 for Figure 1 The diagram shows an exploded view of the battery casing.

[0020] Figure 3 for Figure 1 The image shows a side view of the battery casing.

[0021] Figure 4 for Figure 3 The image shows a cross-sectional view of the battery casing along direction AA.

[0022] Figure 5 for Figure 4 A partially enlarged schematic diagram of part B in the battery casing shown.

[0023] Figure label:

[0024] 1. Shell; 11. Protrusion; 12. Fold-over section;

[0025] 2. Positive electrode top cover assembly; 21. First cover plate; 22. First electrode post; 23. First plastic part; 24. Metal sheet;

[0026] 3. Negative electrode top cover assembly; 31. Second cover plate; 32. Second electrode post; 33. Second plastic part;

[0027] 100. Enclosed space. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0033] Please combine them together Figures 1 to 5 The battery casing provided by this utility model will now be described. The battery casing is used in a battery.

[0034] The battery casing includes: a casing 1, a positive electrode top cover assembly 2, and a negative electrode top cover assembly 3. The positive electrode top cover assembly 2, the negative electrode top cover assembly 3, and the casing 1 enclose a closed space 100. The closed space 100 is used to install the battery cell. The positive electrode top cover assembly 2 includes a first cover plate 21 and at least one first terminal post 22. The first cover plate 21 and the first terminal post 22 are integrally formed. The negative electrode top cover assembly 3 includes a second cover plate 31 and at least one second terminal post 32. The second cover plate 31 and the second terminal post 32 are integrally formed.

[0035] Understandably, the positive electrode top cover assembly 2 and the negative electrode top cover assembly 3 of the battery casing, together with the casing 1, form a closed space 100. This closed space 100 is used to install the battery cells. The positive electrode top cover assembly 2 includes a first cover plate 21 and at least one first terminal post 22, which are integrally formed. The negative electrode top cover assembly 3 includes a second cover plate 31 and at least one second terminal post 32, which are integrally formed. The integration of the first cover plate 21 and the first terminal post 22, as well as the integration of the second cover plate 31 and the second terminal post 32, simplifies the assembly of the positive electrode top cover assembly 2, the negative electrode top cover assembly 3, and the casing 1, reduces the number of parts, reduces assembly steps, improves assembly efficiency, and reduces manufacturing costs. Furthermore, the integrated positive and negative electrode top cover assemblies 3 with the casing 1 improves the internal space utilization of the casing 1, reduces the thickness of the positive and negative top cover assemblies, and reduces weight.

[0036] It should be noted that by integrally forming the first cover plate 21 and the first electrode post 22, and the second cover plate 31 and the second electrode post 32, the safety and reliability of the battery are improved, the process is simplified, welding and assembly processes are reduced, and the yield of finished products is improved.

[0037] It should be noted that the first cover plate 21 can be an aluminum plate, aluminum sheet, or plain aluminum sheet. The second cover plate 31 can be an aluminum plate, aluminum sheet, or plain aluminum sheet. The housing 1 is an aluminum housing and is designed as a double-through aluminum housing. The first cover plate 21 is welded to the housing 1, and the second cover plate 31 is welded to the housing 1.

[0038] Of course, in other embodiments, the battery casing includes a third plastic component. The casing 1 is provided with a stop portion housed in the enclosed space 100 and a contact portion. The first cover plate 21 abuts the third plastic component against the stop portion, and the third plastic component is disposed between the contact portion and the first cover plate 21. Specifically, the third plastic component is a sealing ring. The elastic force of the third plastic component can clamp the first cover plate 21 onto the contact portion, and the stop portion can abut against the third plastic component, so that the first cover plate 21 can be securely abutted against the contact portion by the third plastic component.

[0039] In one embodiment, such as Figure 1 and Figure 2 As shown, multiple first electrode posts 22 are provided and spaced apart along the extension direction of the first cover plate 21, and multiple second electrode posts 32 are provided and spaced apart along the extension direction of the second cover plate 31. By providing multiple first electrode posts 22 on the first cover plate 21 and multiple second electrode posts 32 on the second cover plate 31, the integrated first cover plate 21 and second cover plate 31 can reduce the cost of the top cover assembly, reduce the space utilization of the battery cell, thereby increasing the battery cell capacity and energy density. It also increases the contact area between the electrode posts and the tabs or connecting pieces, improving the stability of the electrical connection. Furthermore, it can improve battery performance by reducing the cost of assembling the cover and electrode posts, improving the stability between the electrode posts and the cover, and avoiding defects such as air leakage caused by welding the electrode posts to the cover (or riveting and then welding).

[0040] In one embodiment, such as Figure 1 As shown, the positive electrode top cover assembly 2 also includes a first plastic part 23 and a metal sheet 24. The first cover plate 21 is insulated and sealed to the metal sheet 24 through the first plastic part 23. Specifically, the first plastic part 23 is a structural component made of polypropylene material, and the metal sheet 24 is a structural component made of metal materials such as steel or aluminum. The way the first plastic part 23 and the metal sheet 24 are joined can replace the lower plastic, thereby achieving insulation between the first cover plate 21 and the metal sheet 24.

[0041] In this embodiment, the positive electrode top cover assembly 2 further includes an insulating component, and the first cover plate 21 is connected to the housing 1 through the insulating component. Specifically, the insulating component 1 is made of a sealing ring or soluble polytetrafluoroethylene. The first cover plate 21 is welded to the housing 1 through the insulating component, thereby insulating the first cover plate 21 from the housing 1.

[0042] Furthermore, a conductive agent is added to the first plastic part 23. This increases the resistance required by the first cover.

[0043] In one embodiment, such as Figures 2 to 5As shown, the negative electrode top cover assembly 3 also includes a second plastic component 33, and the second cover plate 31 is insulated and sealed to the housing 1 through the second plastic component 33. Specifically, the second plastic component 33 is a structural component made of polypropylene material. In this way, the sealing of the battery casing can be ensured, preventing dust and other external environmental particles from entering.

[0044] In this embodiment, the housing 1 is provided with a protrusion 11 that is received in the enclosed space 100, and the second cover plate 31 abuts the second plastic part 33 against the protrusion 11. The wall surface of the housing 1 is recessed into the enclosed space 100 to form or directly form the protrusion 11, and the second plastic part 33 can abut against the protrusion 11 so that the protrusion 11 can always be kept in the current position.

[0045] Furthermore, the housing 1 is also provided with a folding portion 12, and the second plastic part 33 is clamped between the folding portion 12 and the second cover plate 31. The elasticity of the second plastic part 33 can clamp the second cover plate 31 within the folding portion 12, thereby fixing it in place.

[0046] In one embodiment of the battery casing, the battery casing further includes at least one explosion-proof valve, which is installed in the casing 1 and is used to eject material after an explosion. This allows the ejected material inside the battery casing to be ejected through the explosion-proof valve after thermal runaway of the battery cell inside the battery casing.

[0047] In this embodiment, two explosion-proof valves are provided, and they are respectively located on both sides of the housing 1. This can accelerate the ejection of ejected substances from inside the battery housing.

[0048] The present invention also provides a battery, which includes a battery cell and a battery casing of any of the above embodiments, wherein the battery cell is installed in the enclosed space 100 of the battery casing.

[0049] It is understood that the battery of this utility model uses the aforementioned battery casing, so that the positive electrode top cover assembly 2 and the negative electrode top cover assembly 3 of the battery casing are enclosed with the housing 1 to form a closed space 100. The closed space 100 is used to install the battery cell. The positive electrode top cover assembly 2 includes a first cover plate 21 and at least one first terminal post 22, which are integrally formed. The negative electrode top cover assembly 3 includes a second cover plate 31 and at least one second terminal post 32, which are integrally formed. The integration of the first cover plate 21 and the first terminal post 22, as well as the integration of the second cover plate 31 and the second terminal post 32, simplifies the assembly of the positive electrode top cover assembly 2, the negative electrode top cover assembly 3, and the housing 1, reduces the number of parts, reduces assembly steps, improves assembly efficiency, and reduces manufacturing costs. In addition, the integrated positive and negative electrode top cover assemblies 3 and the housing 1 can improve the space utilization rate inside the housing 1, reduce the thickness of the positive and negative top cover assemblies, and reduce weight.

[0050] It should be noted that by integrally forming the first cover plate 21 and the first electrode post 22, and the second cover plate 31 and the second electrode post 32, the safety and reliability of the battery are improved, the process is simplified, welding and assembly processes are reduced, and the yield of finished products is improved.

[0051] 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.

[0052] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A battery housing, characterized by The battery shell comprises a shell, a positive electrode top cover assembly and a negative electrode top cover assembly, the positive electrode top cover assembly and the negative electrode top cover assembly and the shell enclose a closed space for mounting an electrode core, the positive electrode top cover assembly comprises a first cover plate and at least one first pole, the first cover plate and the first pole are integrally formed, and the negative electrode top cover assembly comprises a second cover plate and at least one second pole, the second cover plate and the second pole are integrally formed. The first pole is provided in plurality and is arranged in intervals along the extension direction of the first cover plate, and the second pole is provided in plurality and is arranged in intervals along the extension direction of the second cover plate.

2. The battery case of claim 1, wherein The positive electrode top cover assembly further comprises a first plastic part and a metal sheet, and the first cover plate is insulated and sealed from the metal sheet through the first plastic part.

3. The battery case of claim 1, wherein, The positive electrode top cover assembly further comprises an insulating part, and the first cover plate is connected to the shell through the insulating part.

4. The battery case of claim 3, wherein, The first plastic part is added with a conductive agent.

5. The battery case of claim 3, wherein, The negative electrode top cover assembly further comprises a second plastic part, and the second cover plate is insulated and sealed from the shell through the second plastic part.

6. The battery case of claim 1, wherein, The shell is provided with a protrusion accommodated in the closed space, and the second cover plate abuts the second plastic part on the protrusion.

7. The battery case of claim 6, wherein, The shell is further provided with a folding part, and the second plastic part is clamped between the folding part and the second cover plate.

8. The battery case of claim 6, wherein, The battery shell further comprises at least one explosion-proof valve mounted on the shell and used for splashing and spraying substances after explosion.

9. The battery case according to any one of claims 1 to 7, characterized by, The battery comprises an electrode core and a battery shell as claimed in any one of claims 1 to 9, and the electrode core is mounted in the closed space of the battery shell.

10. A battery, characterized by ​

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