Anti-vibration battery cell cover plate
By setting stress relief grooves on both sides of the aluminum block connecting the cell cover and using a staggered design, the problem of the riveted aluminum block loosening in a vibration environment is solved, achieving higher vibration resistance and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU KEDALI PRECISION IND CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-14
AI Technical Summary
The existing riveted aluminum blocks on the battery cell cover have poor resistance to mechanical creep due to their solid structure. They are prone to loosening in vibration environments, leading to battery cell connection failure and poor reliability.
Multiple stress relief grooves are spaced apart on the opposite sides of the connecting aluminum blocks to reduce rigidity and increase toughness. The staggered arrangement accelerates the multi-stage dissipation of stress, and the riveting installation ensures a stable connection.
It effectively reduces the rigidity of the connecting aluminum block, improves its vibration resistance, prevents loosening, extends service life, and enhances the connection reliability and operational reliability of the battery cell.
Smart Images
Figure CN224502275U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and more specifically, to a vibration-resistant battery cell cover. Background Technology
[0002] The riveted aluminum blocks on the existing battery cell cover are usually a one-piece flat structure. This solid structure is hard and has high overall rigidity, making it difficult to undergo elastic deformation. Under long-term continuous stress, the solid aluminum block is prone to slow and permanent plastic deformation (i.e., creep), and has poor resistance to mechanical creep.
[0003] Currently, after the riveted aluminum block on the battery cell cover is rigidly connected to the busbar, the continuous vibration that often occurs in the application environment (such as the vehicle environment) can easily cause the riveted aluminum block to loosen, resulting in battery cell connection failure and poor reliability. Utility Model Content
[0004] The purpose of this invention is to provide a vibration-resistant battery cell cover to solve the problems existing in the background art.
[0005] The objective of this utility model is achieved through the following technical solution.
[0006] A vibration-resistant battery cell cover includes: a cover body; two electrode assemblies mounted on the cover body, each electrode assembly including a connecting aluminum block, the connecting aluminum block including a first surface and a second surface opposite to each other, and multiple stress relief grooves spaced apart on both the first surface and the second surface of the connecting aluminum block.
[0007] In the above scheme, the cover plate body is installed at the end of the battery cell, and the two pole post assemblies are connected to the positive and negative poles of the battery cell respectively. The external device is electrically connected to the battery cell through the connecting aluminum block. The first and second surfaces are two opposite surfaces of the connecting aluminum block in the thickness direction. Multiple stress relief grooves are provided at intervals on both the first and second surfaces. Compared with the flat aluminum block structure, the stress relief grooves can effectively reduce the rigidity of the connecting aluminum block, improve its toughness, and help release the stress inside the connecting aluminum block. This strengthens the connecting aluminum block's ability to resist mechanical vibration, avoids battery cell failure due to loosening of the connecting aluminum block during use, and improves the reliability of use.
[0008] In one example of this invention, the stress relief grooves on the first and second surfaces are misaligned.
[0009] In the above scheme, the stress relief grooves on the first and second surfaces are staggered in the thickness direction of the connecting aluminum block. By staggering them, more obstacles can be formed inside the connecting aluminum block, realizing multi-level stress dissipation, which is conducive to further accelerating stress release and improving the vibration resistance of the connecting aluminum block.
[0010] In one example of this utility model, the stress relief groove is square, and multiple stress relief grooves are arranged in parallel to each other.
[0011] In the above scheme, the square shape is easy to process and can simplify the production process.
[0012] In one embodiment of this utility model, the stress relief groove extends through the side of the connecting aluminum block at both ends.
[0013] In the above scheme, the two ends of the stress relief groove are connected to both sides of the aluminum block to ensure uniform stress release and avoid uneven stress distribution in the direction of the stress relief groove, which helps to reduce metal fatigue and extend service life.
[0014] In one example of this utility model, the pole assembly includes an insulating base, the cover plate body is provided with a mounting groove that mates with the insulating base, and the connecting aluminum block is installed inside the insulating base.
[0015] In the above scheme, the insulating seat is installed on the cover plate body through the mounting groove, and the aluminum block is installed and connected through the insulating seat to avoid interference and ensure its normal function.
[0016] In one example of this utility model, the connecting aluminum block is installed in the insulating base by riveting.
[0017] In the above solution, the connecting aluminum block and the insulating base are connected by riveting, which provides good sealing and low cost.
[0018] In one example of this utility model, the mounting groove is provided with a protruding limiting post, the insulating seat is provided with a limiting hole that mates with the limiting post, and the side wall of the limiting hole is provided with a protruding snap-fit part.
[0019] In the above scheme, the limiting post and the limiting hole cooperate to facilitate positioning when installing the insulating seat, and at the same time, they can also limit the insulating seat. The snap-fit part is used to make the connection between the limiting post and the limiting hole more secure.
[0020] In one example of this utility model, the insulating base is provided with a positioning block, the limiting hole is provided on the positioning block, and the side of the connecting aluminum block near the insulating base is provided with a positioning groove that cooperates with the positioning block.
[0021] In the above solution, the positioning blocks and positioning slots facilitate positioning when installing and connecting aluminum blocks, making the installation operation simple.
[0022] In one example of this utility model, the pole assembly further includes a connector, which includes a connecting plate and an insert portion. The connecting aluminum block is provided with a connecting hole that mates with the insert portion, and the insert portion is inserted into the connecting aluminum block through the connecting hole.
[0023] In the above scheme, the connecting plate is connected to the current collector inside the battery cell, and the insert part is connected to the connecting aluminum block. The current collector of the battery cell and the connecting aluminum block are electrically connected through the connector. The insert part is inserted into the connecting aluminum block through the connecting hole on the connecting aluminum block to ensure sealing.
[0024] In one example of this utility model, the cover body includes a top cover and an insulating plate connected together.
[0025] In the above scheme, when the cover plate is installed on the battery cell, the insulation and sealing between the battery cell and the top cover are achieved through the insulating plate.
[0026] Compared with the prior art, the beneficial effects of this application are as follows:
[0027] This invention, by setting multiple stress relief grooves at intervals on the opposite sides of the connecting aluminum block, can effectively reduce the rigidity of the connecting aluminum block and improve its toughness compared to a flat structure. This helps to release the stress inside the connecting aluminum block, thereby strengthening the connecting aluminum block's ability to resist mechanical vibration, preventing cell failure due to loosening of the connecting aluminum block during use, improving reliability, and having a simple and effective structure with low processing cost, which is conducive to its widespread use. Attached Figure Description
[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a perspective view of a vibration-resistant battery cell cover plate according to an embodiment of the present invention.
[0030] Figure 2 This is a partial exploded view of the battery cell cover plate of this utility model.
[0031] Figure 3 for Figure 2 A magnified view of area A in the middle.
[0032] Figure 4 This is a top view of the battery cell cover plate of this utility model.
[0033] Figure 5 for Figure 4A cross-sectional view of region AA in the middle.
[0034] Figure 6 for Figure 5 A magnified view of area B in the middle.
[0035] Figure 7 This is a three-dimensional view of the bottom of the connecting aluminum blocks.
[0036] Explanation of the reference numerals in the figure:
[0037] 1-Cover plate body; 11-Top cover; 111-Mounting groove; 112-Limiting post; 12-Insulating plate; 2-Pole post assembly; 21-Connecting aluminum block; 211-Stress relief groove; 212-Positioning groove; 213-Connecting hole; 22-Insulating seat; 221-Positioning block; 222-Limiting hole; 2221-Snap-fit part; 23-Connector; 231-Connecting plate; 232-Embedding part. Detailed Implementation
[0038] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.
[0039] Please refer to Figures 1 to 7 In a preferred embodiment, a vibration-resistant battery cell cover is provided, comprising a cover body 1 and two electrode post assemblies 2 mounted on the cover body 1. Each electrode post assembly 2 includes an insulating base 22 and a connecting aluminum block 21. The connecting aluminum block 21 is riveted into the insulating base 22 and includes a first surface and a second surface facing each other. Multiple stress relief grooves 211 are spaced apart on both the first and second surfaces of the connecting aluminum block 21.
[0040] Specifically, according to the direction shown in the diagram, the first and second surfaces are the top and bottom surfaces of the aluminum block 21.
[0041] The cover plate body 1 is installed at the end of the battery cell. The two pole post assemblies 2 are connected to the positive and negative poles of the battery cell, respectively. External devices are electrically connected to the battery cell through the connecting aluminum block 21. The connecting aluminum block 21 is installed by setting an insulating seat 22 to avoid interference with the connecting aluminum block 21 and ensure its normal function. The first and second surfaces are two opposite surfaces of the connecting aluminum block 21 in the thickness direction. Multiple stress relief grooves 211 are provided at intervals on both the first and second surfaces. Compared with the flat aluminum block structure, the stress relief grooves 211 can effectively reduce the rigidity of the connecting aluminum block 21 and improve its toughness. This helps to release the stress inside the connecting aluminum block 21, thereby strengthening the connecting aluminum block 21's ability to resist mechanical vibration and preventing the battery cell from failing due to the connecting aluminum block 21 loosening during use, thus improving the reliability of use.
[0042] It should be noted that by setting the stress relief groove 211, multiple local flexible areas can be formed on the connecting aluminum block 21. When affected by external forces, these local flexible areas allow the material to undergo slight deformation to absorb and dissipate vibration energy, thereby helping to release internal stress, improving the vibration resistance of the connecting aluminum block 21, and also indirectly improving the creep resistance of the connecting aluminum block 21, avoiding the phenomenon of loosening of the connection, and making the reliability of use higher.
[0043] Preferably, two stress relief grooves 211 are respectively provided on the first and second surfaces of the connecting aluminum block 21, and the specific number of stress relief grooves 211 can be flexibly adjusted as needed.
[0044] It is understandable that the connecting aluminum block 21 and the insulating base 22 are riveted. The riveting method provides a stable connection, good sealing, and is simple and low-cost.
[0045] Please refer to Figure 5 and Figure 6 The stress relief grooves 211 on the first and second surfaces are staggered in the vertical direction. By staggering them, more obstacles can be formed inside the connecting aluminum block 21, forcing the stress to pass through the stress relief grooves 211 more times when it is transmitted inside, thus achieving multi-stage stress dissipation. This is beneficial to further enhance the stress release and improve the vibration resistance of the connecting aluminum block 21.
[0046] Not limited to, in other embodiments, the stress relief grooves 211 on the first and second surfaces of the connecting aluminum block 21 may also be aligned.
[0047] Please refer to Figures 4 to 7 The stress relief groove 211 is connected to both sides of the aluminum block 21 at both ends to ensure that the stress is released evenly and to avoid uneven stress distribution in the direction of the stress relief groove 211, which helps to reduce metal fatigue and extend service life.
[0048] Preferably, the stress relief groove 211 is square, and multiple stress relief grooves 211 are arranged in parallel to each other. The square shape is easy to process and can simplify the production process.
[0049] Please refer to Figure 2 , Figure 3 and Figure 7 To facilitate comparison and understanding, Figure 2The exploded view only shows the pole assembly 2 connected to the negative pole. The cover plate body 1 has a mounting groove 111 that mates with the insulating seat 22. The insulating seat 22 is mounted on the cover plate body 1 through the mounting groove 111. The mounting groove 111 has a protruding limiting post 112. The insulating seat 22 has a limiting hole 222 that mates with the limiting post 112. The side wall of the limiting hole 222 has a protruding snap-fit part 2221. The matching of the limiting post 112 and the limiting hole 222 facilitates positioning when installing the insulating seat 22 and also limits the insulating seat 22. The snap-fit part 2221 is used to make the connection between the limiting post 112 and the limiting hole 222 more secure.
[0050] Furthermore, the insulating base 22 is provided with a positioning block 221, and a limiting hole 222 is provided on the positioning block 221 and passes through the positioning block 221 along the thickness direction. The side of the connecting aluminum block 21 near the insulating base 22 is provided with a positioning groove 212 that cooperates with the positioning block 221. With the positioning block 221 and the positioning groove 212, it is convenient to position the connecting aluminum block 21 when it is installed, making the installation operation simpler.
[0051] Please refer to Figure 2 The pole assembly 2 also includes a connector 23, which includes a connecting plate 231 and an insert portion 232. The connecting aluminum block 21 is provided with a connecting hole 213 that mates with the insert portion 232.
[0052] Specifically, the connecting plate 231 is used to connect with the current collector inside the battery cell. The insert part 232 passes through the hole on the cover plate body 1 and is connected to the connecting aluminum block 21 through the connecting hole 213 on the connecting aluminum block 21, so that the current collector of the battery cell and the connecting aluminum block 21 form an electrical connection. External devices can then form an electrical connection with the battery cell through the connecting aluminum block 21. The insert part 232 is inserted into the connecting aluminum block 21 through the connecting hole 213 on the connecting aluminum block 21 to ensure sealing.
[0053] Understandably, in order to enable the interlocking part 232 to connect with the connecting aluminum block 21, both the cover plate body 1 and the insulating seat 22 are provided with holes for the interlocking part 232 to pass through.
[0054] Please refer to Figure 1 and Figure 2 The cover body 1 includes a top cover 11 and an insulating plate 12 connected to each other. The mounting groove 111 is provided on the surface of the top cover 11 away from the insulating plate 12. When the cover body 1 is installed on the battery cell, the insulating plate 12 is located on the side close to the battery cell. The insulating plate 12 achieves insulation and sealing between the battery cell and the top cover 11, thereby improving the sealing performance and reliability of the battery cell.
[0055] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0056] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0057] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.
[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A vibration-resistant battery cell cover, characterized in that, include: Cover plate body; Two pole post assemblies are installed on the cover plate body. Each pole post assembly includes a connecting aluminum block, which has a first side and a second side facing each other. Multiple stress relief grooves are provided at intervals on both the first side and the second side of the connecting aluminum block.
2. The vibration-resistant cell cover plate according to claim 1, characterized in that, The stress relief grooves on the first and second surfaces are staggered.
3. The vibration-resistant cell cover plate according to claim 1, characterized in that, The stress relief groove is square, and multiple stress relief grooves are arranged in parallel to each other.
4. The vibration-resistant cell cover plate according to claim 1, characterized in that, The stress relief groove extends through the sides of the connecting aluminum block at both ends.
5. The vibration-resistant cell cover plate according to claim 1, characterized in that, The pole assembly includes an insulating base, and the cover plate body is provided with a mounting groove that mates with the insulating base. The connecting aluminum block is installed inside the insulating base.
6. The vibration-resistant cell cover plate according to claim 5, characterized in that, The connecting aluminum block is installed inside the insulating base by riveting.
7. The vibration-resistant cell cover plate according to claim 5, characterized in that, The mounting groove is provided with a protruding limiting post, and the insulating seat is provided with a limiting hole that mates with the limiting post. The side wall of the limiting hole is provided with a protruding snap-fit part.
8. The vibration-resistant cell cover plate according to claim 7, characterized in that, The insulating base is provided with a positioning block, the limiting hole is provided on the positioning block, and the side of the connecting aluminum block near the insulating base is provided with a positioning groove that cooperates with the positioning block.
9. The vibration-resistant cell cover plate according to claim 1, characterized in that, The pole assembly also includes a connector, which includes a connecting plate and an insert. The connecting aluminum block has a connecting hole that mates with the insert, and the insert is inserted into the connecting aluminum block through the connecting hole.
10. The vibration-resistant cell cover plate according to claim 1, characterized in that, The cover plate body includes a top cover and an insulating plate connected together.