Battery top cover and battery

Abstract

The utility model provides a battery top cover and a battery. The battery top cover comprises a cover plate; the lower plastic is arranged on one side of the cover plate in the first direction; the two ends of the upper plastic cement and the lower plastic cement in the second direction are each provided with at least one supporting assembly, the side, facing the cover plate, of each supporting assembly is provided with a protruding structure extending towards the cover plate, the protruding structures are located in the middles of the supporting assemblies in the third direction, and at least the protruding structures are connected with the cover plate; wherein the first direction, the second direction and the third direction are perpendicular to one another in pairs. The battery top cover solves the problem of poor use performance of the battery top cover in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery top cover and a battery. Background Technology

[0002] The top cover of a battery is usually composed of a top cover plate and a lower plastic layer. The top cover plate includes the electrode posts. The lower plastic layer is usually made of polyethylene terephthalate (PET). This PET material is prone to deformation when soaked in electrolyte for a long time. This deformation can cause the lower plastic layer to press down on the electrode assembly, which poses a quality risk.

[0003] Therefore, the existing technology suffers from poor performance of the battery top cover. Utility Model Content

[0004] The main purpose of this utility model is to provide a battery top cover and a battery to solve the problem of poor performance of battery top covers in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery top cover is provided, comprising: a cover plate; a lower plastic material disposed on one side of the cover plate in a first direction; at least two support components, wherein at least one support component is disposed at each end of the lower plastic material in a second direction, and the support component has a protruding structure extending toward the cover plate on the side facing the cover plate, the protruding structure being located at the middle of the support component in a third direction, and at least the protruding structure being connected to the cover plate; wherein the first direction, the second direction, and the third direction are mutually perpendicular.

[0006] Furthermore, the lower plastic section has baffles at both ends in the third direction that connect to the cover plate.

[0007] Furthermore, the lower plastic and the support components are integrally molded structures.

[0008] Furthermore, in the first direction, the support assembly near the cover plate includes a horizontal segment and at least two arcuate segments, the two arcuate segments being spaced apart along a third direction, and the horizontal segment being disposed between the two arcuate segments to form a raised structure.

[0009] Furthermore, in the third direction, the arc segment gradually approaches the lower plastic in a direction away from the horizontal segment; or the arc segment first gradually approaches the lower plastic in a direction away from the horizontal segment, and then gradually moves away from the lower plastic.

[0010] Furthermore, the two arc segments are symmetrically arranged about the horizontal segment.

[0011] Furthermore, the lower plastic includes: a plate-shaped body, the thickness direction of the plate-shaped body, the thickness direction of the cover plate, and a first direction are parallel to each other, and support components are provided at both ends of the plate-shaped body in a second direction; at least one baffle is provided at both ends of the plate-shaped body in a third direction, the thickness direction of the baffle is parallel to the third direction, and when the lower plastic is connected to the cover plate at both ends of the third direction, the baffle is connected to the cover plate.

[0012] Furthermore, the plate-shaped body and the cover plate are parallel, and in the first direction, the support component protrudes from the plate-shaped body toward the side closer to the cover plate; the support component, the cover plate, and the plate-shaped body enclose and form an accommodating space; or in the first direction, the middle part of the plate-shaped body has a protrusion toward the side of the cover plate, and the projection of the plate-shaped body along the second direction coincides with the projection of the support component along the second direction.

[0013] Furthermore, in the second direction, the area of ​​the cross-section perpendicular to the second direction at any position of the plate-shaped body is the same.

[0014] According to another aspect of the present invention, a battery is provided, including the battery top cover described above.

[0015] Applying the technical solution of this utility model, the battery top cover in this application includes a cover plate, a lower plastic layer, and at least two support components. The lower plastic layer is disposed on one side of the cover plate in a first direction; in a second direction, at least one support component is respectively disposed at both ends of the lower plastic layer, and the side of the support component facing the cover plate has a protruding structure extending toward the cover plate, the protruding structure being located at the middle of the support component in a third direction, and at least the protruding structure being connected to the cover plate; wherein, the first direction, the second direction, and the third direction are mutually perpendicular.

[0016] In existing battery top covers, the middle section of the lower plastic layer along its length is prone to deformation, which can compress the electrode assembly. However, with the battery top cover of this application, a support component is provided on the lower plastic layer. This support component has a protruding structure extending towards the cover plate on its side. The protruding structure is located at the middle of the support component in the third direction and is at least connected to the cover plate. This provides better support for the middle section of the lower plastic layer in the third direction, i.e., the middle section along its length. This prevents the lower plastic layer from deforming due to prolonged immersion in the electrolyte, thus protecting the electrode assembly and preventing deformation that could compress it. Therefore, the battery top cover of this application effectively solves the problem of poor performance in existing battery top covers. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 An exploded view of the battery top cover is shown when one end of the baffle is flush with the support assembly in this application.

[0019] Figure 2 An exploded view of the battery top cover is shown when one end of the baffle protrudes out of the support assembly in this application.

[0020] Figure 3 An exploded view of the battery top cover is shown when the baffle extends along the side of the lower plastic away from the support assembly in this application;

[0021] Figure 4 A schematic diagram of the structure of the battery top cover when the lower plastic of the battery top cover deforms is shown in the prior art;

[0022] Figure 5 A schematic diagram of the structure of the battery top cover according to a specific embodiment of this application is shown;

[0023] Figure 6 A schematic diagram of the baffle, plate-shaped body, and support assembly according to a specific embodiment of this application is shown.

[0024] Figure 7 A schematic diagram of the baffle, plate-shaped body, and support components of another specific embodiment of this application is shown.

[0025] The above figures include the following reference numerals:

[0026] 10. Cover plate; 20. Lower plastic; 21. Baffle; 22. Plate-shaped body; 30. Support assembly; 31. Horizontal section; 32. Arc-shaped section. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] To address the issue of poor performance of existing battery top covers, a battery top cover and a battery are provided.

[0031] Furthermore, the battery in this application has the following battery top cover.

[0032] like Figures 1 to 3 , Figures 5 to 7 As shown, the battery top cover in this application includes a cover plate 10, a lower plastic 20, and at least two support components 30. The lower plastic 20 is disposed on one side of the cover plate 10 in a first direction X; in the second direction Y, at least one support component 30 is disposed at each end of the lower plastic 20, and the side of the support component 30 facing the cover plate 10 has a protruding structure extending toward the cover plate 10, the protruding structure is located at the middle of the support component 30 in the third direction Z, and at least the protruding structure is connected to the cover plate 10; wherein, the first direction, the second direction, and the third direction are mutually perpendicular.

[0033] In other words, Figure 1 The first direction is the X-axis, the second direction is the Y-axis, and the third direction is the Z-axis.

[0034] like Figure 4 As illustrated, in existing battery top covers, the middle section of the lower plastic part along its length is prone to deformation, which can compress the electrode components. However, with the battery top cover of this application, a support component 30 is provided on the lower plastic part 20. This support component 30 has a protruding structure extending towards the cover plate 10 on its side facing the cover plate 10. This protruding structure is located at the middle of the support component 30 in the third direction and is at least connected to the cover plate 10. This provides better support for the middle section of the lower plastic part 20 along its length, preventing deformation caused by prolonged immersion in the electrolyte. This, in turn, protects the electrode components inside the battery, preventing deformation of the plastic part from compressing the electrode components. Therefore, the battery top cover of this application effectively solves the problem of poor performance in existing battery top covers.

[0035] The electrode assembly can be formed by winding positive and negative electrodes and a diaphragm, or by stacking positive and negative electrodes and a diaphragm.

[0036] It should be noted that, as Figure 1To illustrate, in this application, the first direction X can be the thickness direction of the cover plate 10, meaning the cover plate 10 and the lower plastic 20 are stacked in the thickness direction. The second direction Y can be the width direction of the cover plate 10, and the width direction of the cover plate 10 is the same as the width direction of the lower plastic 20. The third direction Z can be the length direction of the cover plate 10. Similarly, for the support component 30, the length direction of the support component 30 is the same as the length direction of the cover plate 10, the width direction of the support component 30 is the same as the thickness direction of the cover plate 10, and the thickness direction of the support component 30 is the same as the width direction of the cover plate 10.

[0037] like Figure 4 As shown in the figure, the battery top cover has a structural schematic diagram when the lower plastic 20 of the battery top cover deforms in the prior art.

[0038] And, as Figures 1 to 3 As shown in the figure, the vertical direction represents the length of the cover plate 10, the lower plastic 20, and the support assembly 30. Optionally, there are two support assemblies 30, each located at one end of the width of the lower plastic 20. That is, in this application, a support assembly 30 is provided on each of the two sides of the lower plastic 20 along its length. Furthermore, the two support assemblies 30 have identical structures.

[0039] Specifically, the lower plastic component 20 and the support component 30 are integrally molded structures. Alternatively, in this application, the support component 30 can be considered part of the lower plastic component 20. Furthermore, in this application, the materials used to manufacture the lower plastic component 20 and the support component 30 can be the same. This integral molding design not only simplifies the manufacturing process and reduces production costs but also enhances the stability and consistency of the overall structure, making it suitable for large-scale automated production and effectively improving production efficiency and reducing the defect rate.

[0040] Of course, in this application, in addition to the protruding structure being able to connect with the cover plate 10, the lower plastic 20 is provided with baffles 21 at both ends in the third direction Z, wherein the baffles 21 are connected to the cover plate 10. Since the lower plastic 20 and the support component 30 are integrally molded structures, the stability of the connection between the cover plate 10, the lower plastic 20 and the support component 30 can be effectively improved by adding baffles 21.

[0041] Optionally, in the first direction, the support component 30 near the cover plate 10 includes a horizontal segment 31 and at least two arc-shaped segments 32. The two arc-shaped segments 32 are spaced apart along a third direction, and the horizontal segment 31 is disposed between the two arc-shaped segments 32, forming a protruding structure. Therefore, regarding the shape of the support component 30 in this application, the shape of the support component 30 is similar to a trapezoid with an arc-shaped hypotenuse, and the side of the support component 30 connected to the lower plastic 20 is the lower base of the trapezoid, while the horizontal segment 31 is the upper base of the trapezoid, and the part corresponding to the upper base is the protruding structure. Of course, in this application, the support component 30 can also be regarded as a shape that gradually tapers from the side connected to the lower plastic 20 towards the horizontal segment 31, forming a protruding structure corresponding to the middle position of the lower plastic 20 in the length direction, thereby providing support for the middle position of the lower plastic 20 in the length direction, and thus effectively preventing deformation of the lower plastic 20, thereby protecting the electrode assembly.

[0042] Furthermore, in this application, the length of the horizontal segment 31 can be adaptively adjusted according to actual usage requirements. Optionally, the length of the horizontal segment 31 ranges from 5 to 15 mm, where the length of the horizontal segment 31 is its dimension in the third direction Z.

[0043] In one specific embodiment of this application, such as Figure 2 As shown, on the third direction Z, the arc segment 32 gradually approaches the lower plastic 20 in a direction away from the horizontal segment 31.

[0044] In another specific embodiment of this application, such as Figure 1 As shown, on the third direction Z, the arc segment 32 gradually approaches the lower plastic 20 in the direction away from the horizontal segment 31, and then gradually moves away from the lower plastic 20.

[0045] Optionally, the two arc-shaped segments 32 are symmetrically arranged about the horizontal segment 31. This arrangement ensures that the lower plastic 20 is subjected to more uniform and stable stress after it is assembled with the cover plate 10, thereby guaranteeing the performance of the battery cover plate in this application. Furthermore, in this application, the centerline of the horizontal segment 31 coincides with the centerline of the side of the lower plastic along its length, or in other words, the line connecting the midpoint of the horizontal segment 31 and the midpoint of the long side of the lower plastic 20 is perpendicular to the length direction of the lower plastic 20.

[0046] Optionally, the horizontal segment 31 is connected to the side of the cover plate 10 near the lower plastic 20. Of course, in this application, the side of the cover plate 10 near the lower plastic 20 may also contact the support assembly 30 or other parts of the lower plastic 20.

[0047] In one specific embodiment of this application, such as Figure 3As shown, the side of the lower plastic 20 extending in the width direction has a baffle 21 extending in the thickness direction of the cover plate 10, and the baffle 21 extends along the side of the lower plastic 20 away from the support assembly 30.

[0048] In another specific embodiment of this application, such as Figure 1 and Figure 2 As shown, the side of the lower plastic 20 extending in the width direction has a baffle 21. In the thickness direction of the cover plate 10, the baffle 21 extends along both sides of the lower plastic 20, and the end of the baffle 21 near the support assembly 30 is flush with or protrudes from the support assembly 30.

[0049] In this application, the side of the lower plastic 20 extending in the width direction has a baffle 21. In the thickness direction of the cover plate 10, the baffle 21 extends along both sides of the lower plastic 20, and the end of the baffle 21 near the support component 30 is flush with or protrudes from the support component 30.

[0050] In some embodiments, such as Figure 6 and Figure 7 As shown, the lower plastic 20 includes a plate-shaped body 22 and a baffle 21. The thickness direction of the plate-shaped body 22, the thickness direction of the cover plate 10, and the first direction X are parallel to each other. Support components 30 are provided at both ends of the plate-shaped body 22 in the second direction Y. At least one baffle 21 is provided at both ends of the plate-shaped body 22 in the third direction Z. The thickness direction of the baffle 21 is parallel to the third direction.

[0051] Optionally, such as Figure 7 As shown, the plate-shaped body 22 and the cover plate 10 are parallel; and in the first direction X, the support component 30 protrudes from the plate-shaped body 22 toward the side closer to the cover plate 10; the support component 30, the cover plate 10, and the plate-shaped body 22 enclose and form an accommodating space. At this time, the shape of the plate-shaped body 22 can be a rectangular flat plate.

[0052] Optionally, such as Figure 6 As shown, in the first direction X, the middle part of the plate-shaped body 22 has a protrusion facing the cover plate 10, and the projection of the plate-shaped body 22 in the second direction Y completely coincides with the projection of the support assembly 30 in the second direction Y.

[0053] Preferably, in the second direction Y, the area of ​​the cross-section perpendicular to the second direction Y at any position of the plate-shaped body 22 is the same. In this case, the outer contours of the plate-shaped body 22 and the support assembly 30 in the planes containing the first and third directions are the same; or, the only difference between the shapes of the plate-shaped body 22 and the support assembly 30 is their length in the second direction, i.e., the length of the plate-shaped body 22 in the second direction is greater than the length of the support assembly 30 in the second direction. Alternatively, the support assembly 30 is a part of the plate-shaped body 22, i.e., the two support assemblies 30 are the portions of the plate-shaped body 22 at both ends in the second direction.

[0054] Understandable. Figure 6 The schematic plate-shaped body 22 has the same structural outline as the support component 30. Therefore, the protrusion on the middle part of the plate-shaped body 22 can also be connected to the cover plate 10. This can improve the connection between the cover plate 10, the lower plastic 20 and the support component 30, and can also further improve the deformation of the lower plastic 20.

[0055] In an optimized manner, the lower plastic 20 and the support component 30 are integrally injection molded.

[0056] In this application, the baffle 21 not only ensures the overall sealing performance of the battery, but also effectively prevents other parts of the battery top cover from squeezing the electrode assembly. Of course, the arrangement of the baffle 21 in this application can be adapted to meet actual design requirements.

[0057] Of course, the battery top cover in this application also has structures such as the explosion-proof valve under plastic, explosion-proof valve, liquid injection port and terminal positioning hole, which are existing technologies and will not be described in detail in this application.

[0058] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0059] 1. Effectively solves the problem of poor performance of battery top covers in existing technologies;

[0060] 2. Simple structure and stable performance.

[0061] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0062] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0063] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0064] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery top cover characterized by, include: Cover plate (10); Lower plastic (20), the lower plastic (20) being disposed on one side of the cover plate (10) in the first direction; At least two support components (30) are provided at both ends of the lower plastic (20) in a second direction. The support component (30) has a protrusion extending toward the cover plate (10) on the side facing the cover plate (10). The protrusion is located in the middle of the support component (30) in a third direction, and at least the protrusion is connected to the cover plate (10). Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

2. The battery top cover according to claim 1, characterized in that, The lower plastic (20) has baffles (21) at both ends in the third direction that are connected to the cover plate (10).

3. The battery cup of claim 2, wherein: The lower plastic (20) and the support component (30) are integrally molded structures.

4. The battery cup of claim 2, wherein: In the first direction, the support component (30) near the cover plate (10) includes a horizontal segment (31) and at least two arcuate segments (32), the two arcuate segments (32) being spaced apart along the third direction, and the horizontal segment (31) being disposed between the two arcuate segments (32) to form the protruding structure.

5. The battery header of claim 4, wherein, Upward from the third party, The arc-shaped segment (32) gradually approaches the lower plastic (20) in a direction away from the horizontal segment (31); or The arc-shaped segment (32) gradually approaches the lower plastic (20) in a direction away from the horizontal segment (31), and then gradually moves away from the lower plastic (20).

6. The battery header of claim 4, wherein, The two arc segments (32) are symmetrically arranged about the horizontal segment (31).

7. The battery header of any one of claims 2 to 6, wherein, The lower plastic (20) includes: The plate-shaped body (22) is parallel to the thickness direction of the plate-shaped body (22), the thickness direction of the cover plate (10), and the first direction. The plate-shaped body (22) is provided with the support components (30) at both ends of the second direction. The plate-shaped body (22) is provided with at least one baffle (21) at each of the three third directions. The thickness direction of the baffle (21) is parallel to the three third directions. When the lower plastic (20) is connected to the cover plate (10) at both ends of the three third directions, the baffle (21) is connected to the cover plate (10).

8. The battery top cover according to claim 7, characterized in that, The plate-shaped body (22) and the cover plate (10) are parallel, and in the first direction, the support component (30) protrudes from the plate-shaped body (22) toward the side closer to the cover plate (10); a receiving space is formed between the support component (30), the cover plate (10), and the plate-shaped body (22); or In the first direction, the plate-shaped body (22) has a protrusion in the middle facing the cover plate (10), and the projection of the plate-shaped body (22) in the second direction coincides with the projection of the support assembly (30) in the second direction.

9. The battery header of claim 8, wherein, In the second direction, the area of the section of the plate-shaped body (22) perpendicular to the second direction is the same at any position.

10. A battery, characterized by A battery top cover comprising any one of claims 1 to 9.

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