Expansion buffer supporting assembly, battery shell and battery
By setting a reinforcement between the expansion beam of the battery and the side wall of the battery box and setting a weakened structure on it to absorb impact force, the problem of deformation and damage of the expansion beam is solved, and the ability to resist cell expansion and external impact is improved to ensure battery safety.
Patent Information
- Application Number
- CN202421642095.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The expansion beam is prone to irreversible deformation damage under the expansion of the battery cell and external impact, resulting in protection failure.
There is a receiving space between the first expansion beam and the second expansion beam arranged at the design interval, connected to the side wall of the battery box by a reinforcement, and a weakened structure is provided on the reinforcement to absorb impact forces and prevent deformation of the expansion beam.
It improves the expansion beam's resistance to cell expansion and external impact, prevents irreversible deformation and damage to the expansion beam, and ensures the quality and safety of the battery.
Smart Images
Figure CN223167566U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy storage devices, in particular to an expansion buffer support assembly, a battery case and a battery. Background Art
[0002] The structural design of the expansion beam requires that the expansion beam has a certain structural strength to pre-tighten the battery cell, and also requires that it can absorb the deformation caused by the expansion of the battery cell during its life cycle. However, during the process of the battery cell expanding and pressing against the expansion beam, the expansion beam may still be deformed under pressure. In addition, during the operation of the vehicle, there is a situation where the battery is accidentally impacted. If the impact occurs on the side with the expansion beam, it will cause irreversible deformation damage to the expansion beam, rendering the protection and support function of the expansion beam for the battery cell ineffective.
[0003] Therefore, there is an urgent need for an expansion buffer support assembly, a battery case and a battery to solve the above problems. Summary of the Utility Model
[0004] One object of the utility model is to provide an expansion buffer support assembly, which can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, and prevent irreversible deformation damage of the expansion beam.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] Provide an expansion buffer support assembly, including:
[0007] A first expansion beam and a second expansion beam arranged at intervals, with an accommodation space between the first expansion beam and the second expansion beam for accommodating the battery cell;
[0008] A plurality of reinforcing members, the first expansion beam is connected to the first side wall of the battery box through some of the reinforcing members, the second expansion beam is connected to the second side wall of the box through the remaining reinforcing members, and a weakening structure is provided on each reinforcing member, and the weakening structure can be deformed and collapsed first when the first side wall and the second side wall are impacted or the first expansion beam and the second expansion beam are squeezed.
[0009] Optionally, the weakening structure is a concave structure.
[0010] Optionally, the reinforcing member has a bent edge, and the center of the weakening structure is located on the bent edge.
[0011] Optionally, a plurality of the weakening structures are arranged at intervals on one reinforcing member.
[0012] Optionally, it further includes a connecting beam disposed between the first expansion beam and the second expansion beam, with both ends of the connecting beam being connected to the first expansion beam and the second expansion beam respectively.
[0013] Optionally, the length direction of the reinforcing member connected to the first side wall is perpendicular to the first side wall, and the length direction of the reinforcing member connected to the second side wall is perpendicular to the second side wall;
[0014] And / or, the length direction of the first expansion beam is parallel to the first side wall, and the length direction of the second expansion beam is parallel to the second side wall;
[0015] And / or, the length direction of the first expansion beam is parallel to the length direction of the second expansion beam.
[0016] Optionally, it further includes a reinforcing plate, with part of the reinforcing plate disposed on the first expansion beam to strengthen the structural strength of the area of the first expansion beam corresponding to the location of the reinforcing member, and the remaining reinforcing plate disposed on the second expansion beam to strengthen the structural strength of the area of the second expansion beam corresponding to the location of the reinforcing member.
[0017] Optionally, a first avoidance groove is formed on the first expansion beam, and / or a second avoidance groove is formed on the second expansion beam.
[0018] Another object of the present invention is to provide a battery housing that can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, and prevent irreversible deformation damage of the expansion beam.
[0019] To achieve this purpose, the present invention adopts the following technical solutions:
[0020] Provide a battery housing, including a box body and the above-mentioned expansion buffer support assembly, and the expansion buffer support assembly is disposed inside the box body.
[0021] Another object of the present invention is to provide a battery that can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, prevent irreversible deformation damage of the expansion beam, and ensure the quality and use safety of the battery.
[0022] To achieve this purpose, the present invention adopts the following technical solutions:
[0023] Provide a battery, including a battery cell and the above-mentioned battery housing, and the battery cell is disposed in the accommodation space.
[0024] The beneficial effects of the present invention:
[0025] The present utility model provides an expansion buffer support assembly, which includes a first expansion beam and a second expansion beam arranged at intervals, and also includes a plurality of reinforcing members. Among them, there is an accommodation space between the first expansion beam and the second expansion beam, and the accommodation space is used to accommodate the battery cell. The first expansion beam is connected to the first side wall of the battery box through some of the reinforcing members, so as to form a force transmission between the first expansion beam and the first side wall. The second expansion beam is connected to the second side wall of the box through the remaining reinforcing members, so as to form a force transmission between the second expansion beam and the second side wall. A weakening structure is provided on each reinforcing member. When the first side wall and the second side wall are impacted or the first expansion beam and the second expansion beam are extruded, the weakening structure on the reinforcing member will deform and collapse first, that is, the weakening structure can absorb the impact force and preset the position of the overall assembly deformation, thereby helping to prevent the expansion beam from deforming. Therefore, this expansion buffer support assembly can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, and prevent irreversible deformation damage of the expansion beam.
[0026] The present utility model also provides a battery housing, which includes a box body and the above-mentioned expansion buffer support assembly, and the expansion buffer support assembly is arranged in the box body. This battery housing can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, and prevent irreversible deformation damage of the expansion beam.
[0027] The present utility model also provides a battery, which includes a battery cell and the above-mentioned battery housing, and the battery cell is arranged in the accommodation space. This battery can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, prevent irreversible deformation damage of the expansion beam, and ensure the quality and use safety of the battery. Description of the Drawings
[0028] Figure 1 is a partial structural schematic diagram of the expansion buffer support assembly provided by the embodiment of the present utility model Figure 1 ;
[0029] Figure 2 is a partial structural schematic diagram of the expansion buffer support assembly provided by the embodiment of the present utility model Figure 2 ;
[0030] Figure 3 is Figure 2 an enlarged view of part A of
[0031] In the figure:
[0032] 1. First expansion beam; 11. First avoidance groove; 2. Second expansion beam; 21. Second avoidance groove; 3. Reinforcing member; 31. Bent edge; 311. Weakening structure; 4. Connecting beam; 100. Accommodation space. Detailed Embodiments
[0033] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.
[0034] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.
[0036] As Figures 1 - 3 shown, the expansion buffer support assembly of this embodiment includes a first expansion beam 1 and a second expansion beam 2 arranged at intervals, and further includes a plurality of reinforcing members 3. Among them, there is an accommodation space 100 between the first expansion beam 1 and the second expansion beam 2, and the accommodation space 100 is used to accommodate the battery cell. The first expansion beam 1 is arranged close to the first side wall of the battery box, and the second expansion beam 2 is arranged close to the second side wall of the box. The first expansion beam 1 is connected to the first side wall of the battery box through some of the reinforcing members 3, so as to form a force transmission between the first expansion beam 1 and the first side wall. The second expansion beam 2 is connected to the second side wall of the box through the remaining reinforcing members 3, so as to form a force transmission between the second expansion beam 2 and the second side wall. A weakening structure 311 is provided on each reinforcing member 3. When the first side wall and the second side wall are impacted or the first expansion beam 1 and the second expansion beam 2 are squeezed, the weakening structure 311 on the reinforcing member 3 will first deform and collapse, that is, the weakening structure 311 can absorb the impact force and preset the position of the overall assembly deformation, thereby helping to prevent the expansion beam from deforming. Therefore, this expansion buffer support assembly can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, and prevent irreversible deformation damage of the expansion beam.
[0037] Optionally, the length direction of the reinforcing member connected to the first side wall is perpendicular to the first side wall, and the length direction of the reinforcing member connected to the second side wall is perpendicular to the second side wall. That is, the acting directions of the impact forces perpendicular to the first side wall and perpendicular to the second side wall are consistent with the length direction of the reinforcing member 3, which can improve the impact resistance of the reinforcing member 3. Optionally, one end of a part of the reinforcing members 3 is welded to the first side wall, and the other end is welded to the first expansion beam 1, and one end of the remaining reinforcing members 3 is welded to the second side wall, and the other end is welded to the second expansion beam 2.
[0038] Optionally, the length direction of the first expansion beam 1 is parallel to the first side wall, and the length direction of the second expansion beam 2 is parallel to the second side wall. Optionally, the length direction of the first expansion beam 1 is parallel to the length direction of the second expansion beam 2.
[0039] Optionally, in this embodiment, the length directions of the first expansion beam 1 and the second expansion beam 2 are both parallel to the bottom surface of the box body. The reinforcing member 3 is located at the lower middle part in the height direction of the first expansion beam 1 and the second expansion beam 2, and along the length directions of the first expansion beam 1 and the second expansion beam 2, a plurality of reinforcing members 3 are arranged at equal intervals to ensure that the supporting forces of the reinforcing member 3 on the first expansion beam 1 and the second expansion beam 2 are relatively balanced. The specific position where the reinforcing member 3 is arranged can be adjusted according to the length of the battery cell and the results of mechanical simulation.
[0040] Optionally, the weakening structure 311 is a concave structure. Optionally, the reinforcing member 3 has a bent edge 31, and the center of the weakening structure 311 is located on the bent edge 31. Optionally, in this embodiment, the cross-section of the reinforcing member 3 is similar to a C-shaped structure, and three plate surfaces enclose to form a receiving space. When the weakening structure 311 deforms and collapses, it will shrink into the receiving space and will not form a protruding point to avoid damaging the components in the surrounding space. Of course, in other embodiments, the reinforcing member 3 can also be a tubular structure. If its cross-section is a polygon, the weakening structure 311 can still be a concave structure arranged at the bent edge 31. If its cross-section is a circular or elliptical closed curve shape, the weakening structure 311 can also be correspondingly set as an annular concave structure, which is arranged circumferentially and closedly along the tubular structure.
[0041] Optionally, in this embodiment, the reinforcing member 3 is obtained by bending a plate, which can minimize the weight while ensuring the pressure resistance along the length direction. The weakening structure 311 is also obtained by stamping technology, which can simplify the processing process.
[0042] Optionally, a plurality of weakening structures 311 are arranged at intervals on one reinforcing member 3, and the plurality of weakening structures 311 are arranged at equal intervals. In this embodiment, the reinforcing member 3 has two bent edges 31, and a plurality of weakening structures 311 are arranged on each bent edge 31, and the specific number can be adjusted according to factors such as the size of the reinforcing member 3.
[0043] Optionally, the expansion buffer support assembly further includes a connecting beam 4 disposed between the first expansion beam 1 and the second expansion beam 2. The two ends of the connecting beam 4 are respectively connected to the first expansion beam 1 and the second expansion beam 2. Optionally, the length direction of the connecting beam 4 is perpendicular to the length directions of the first expansion beam 1 and the second expansion beam 2. Optionally, the connecting beam 4 is connected to the bottom surface of the box body, and the first expansion beam 1 and the second expansion beam 2 are further connected to the box body through the connecting beam 4. Optionally, the two ends of the connecting beam 4 are respectively welded to the first expansion beam 1 and the second expansion beam 2, and the connecting beam 4 is also welded to the bottom surface of the box body to ensure the connection strength. The box body, the reinforcing member 3, the first expansion beam 1, the second expansion beam 2, and the connecting beam 4 are welded together as a whole to ensure good rigidity of the overall assembly.
[0044] Optionally, the expansion buffer support assembly further includes reinforcing plates (not shown in the figure). Some of the reinforcing plates are disposed on the first expansion beam 1 to strengthen the structural strength of the area of the first expansion beam 1 corresponding to the reinforcing member 3, and the remaining reinforcing plates are disposed on the second expansion beam 2 to strengthen the structural strength of the area of the second expansion beam 2 corresponding to the reinforcing member 3. Optionally, in this embodiment, for the reinforcing plate disposed on the first expansion beam 1, the plate surface of the reinforcing plate is parallel to the first expansion beam 1, the reinforcing plate is welded to the first expansion beam 1, and the reinforcing member 3 is welded to the reinforcing plate. For the reinforcing plate disposed on the second expansion beam 2, the plate surface of the reinforcing plate is parallel to the second expansion beam 2, the reinforcing plate is welded to the second expansion beam 2, and similarly, the reinforcing member 3 is welded to the reinforcing plate. In other embodiments, the reinforcing plate may also be disposed on the back surface of the first expansion beam 1 or the second expansion beam 2 where the reinforcing member 3 is provided as a reinforcing rib to strengthen the structural strength of this area.
[0045] Optionally, a first avoidance groove 11 is formed on the first expansion beam 1, and optionally, a second avoidance groove 21 is formed on the second expansion beam 2. The provision of the avoidance groove can reserve space for the wiring of the main positive copper bar and the main negative copper bar of the battery cell, avoiding cross-connection from above the expansion beam.
[0046] This embodiment also provides a battery housing, including a box body and the above-mentioned expansion buffer support assembly. The expansion buffer support assembly is disposed inside the box body and is welded to the box body as a whole to jointly support the battery cell. This battery housing can help improve the ability of the expansion beam to resist the expansion of the battery cell and external impacts, and prevent irreversible deformation damage of the expansion beam.
[0047] This embodiment also provides a battery, including a battery cell and the above-mentioned battery housing, and the battery cell is disposed in the accommodation space 100. In this embodiment, a plurality of battery cells are arranged in sequence along the length direction of the connecting beam 4, and the side surface with the largest area of the battery cell at one end abuts against the first expansion beam 1, and the side surface with the largest area of the battery cell at the other end abuts against the second expansion beam 2. The first expansion beam 1 and the second expansion beam 2 can transfer the acting force of the expansion of the battery cell to the box body through the reinforcing member 3, and can crush the weakening structure 311 on the reinforcing member 3 when the acting force reaches a certain value, preventing irreversible deformation damage of the expansion beam, improving the ability of the expansion beam to resist the expansion of the battery cell and external impact, and ensuring the quality and use safety of the battery.
[0048] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. Inflatable buffer support assembly, characterized in that, Comprising: First and second expansion beams (1, 2) arranged at intervals, with an accommodation space (100) between the first expansion beam (1) and the second expansion beam (2), and the accommodation space (100) is used to accommodate the battery cell; A plurality of reinforcing members (3), the first expansion beam (1) is connected to the first side wall of the battery box through some of the reinforcing members (3), the second expansion beam (2) is connected to the second side wall of the box through the remaining reinforcing members (3), and a weakening structure (311) is provided on each reinforcing member (3), and the weakening structure (311) can be deformed and collapsed first when the first side wall and the second side wall are impacted or the first expansion beam (1) and the second expansion beam (2) are squeezed.
2. The expansion buffer support assembly according to claim 1, wherein The weakening structure (311) is a concave structure.
3. The expansion buffer support assembly according to claim 1, wherein, The reinforcing member (3) has a bent edge (31), and the center of the weakening structure (311) is located on the bent edge (31).
4. The expansion buffer support assembly according to claim 1, wherein A plurality of the weakening structures (311) are arranged at intervals on one reinforcing member (3).
5. The expansion buffer support assembly according to any one of claims 1-4, characterized in that, It further includes a connecting beam (4), the connecting beam (4) is arranged between the first expansion beam (1) and the second expansion beam (2), and both ends of the connecting beam (4) are respectively connected to the first expansion beam (1) and the second expansion beam (2).
6. The expansion buffer support assembly according to any one of claims 1-4, characterized in that, The length direction of the reinforcing member (3) connected to the first side wall is perpendicular to the first side wall, and the length direction of the reinforcing member (3) connected to the second side wall is perpendicular to the second side wall; And / or, the length direction of the first expansion beam (1) is parallel to the first side wall, and the length direction of the second expansion beam (2) is parallel to the second side wall; And / or, the length direction of the first expansion beam (1) is parallel to the length direction of the second expansion beam (2).
7. The expansion buffer support assembly according to any one of claims 1-4, characterized in that, It further includes a reinforcing plate, some of the reinforcing plates are arranged on the first expansion beam (1) to strengthen the structural strength of the area of the first expansion beam (1) corresponding to the arrangement of the reinforcing member (3), and the remaining reinforcing plates are arranged on the second expansion beam (2) to strengthen the structural strength of the area of the second expansion beam (2) corresponding to the arrangement of the reinforcing member (3).
8. The expansion buffer support assembly according to any one of claims 1-4, characterized in that, A first avoidance groove (11) is formed on the first expansion beam (1), and / or, a second avoidance groove (21) is formed on the second expansion beam (2).
9. Battery housing, characterized in that, Comprising a box body and the expansion buffer support assembly according to any one of claims 1-8, and the expansion buffer support assembly is arranged in the box body.
10. A battery, characterized in that, Comprising a battery cell and the battery housing according to claim 9, and the battery cell is arranged in the accommodation space (100).