Battery cover plate structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cover plate structure and a battery. The connecting piece is arranged on one side of the plate body in the first direction, and the connecting piece is suitable for being riveted and fixed with a pole; the insulating part is arranged between the plate body and the connecting part, the insulating part comprises a bottom wall and a side wall, the side wall is formed by surrounding the circumferential edge of the bottom wall and extending in the direction away from the bottom wall in the first direction, and the side wall and the bottom wall are suitable for jointly wrapping the connecting part; the side, facing the connecting piece, of the side wall and / or the bottom wall protrudes to form a convex rib structure, and the convex rib structure is suitable for being elastically connected with the connecting piece in an abutting mode. According to the battery cover plate structure provided by the utility model, the riveting pressure is absorbed and relieved through the convex rib structure, so that the undesirable phenomena of cracking, cracks, micro-cracks, deformation and the like of the insulating part caused by fluctuation of parts and equipment in the riveting process are avoided, and the safety of the battery cover plate structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery cover plate structure and a battery. Background Art

[0002] With the increasing maturity of lithium-ion battery technology, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the use performance and safety of lithium-ion batteries are increasing day by day. The lithium battery core is a core component for the safety and assembly of the battery pack, and its structural design is crucial for the safety of the battery core. However, in the existing cover plate structure during the riveting process, due to fluctuations in parts and equipment, the upper plastic is prone to cracking during riveting. Summary of the Utility Model

[0003] In view of this, the utility model provides a battery cover plate structure and a battery to solve the problem that the upper plastic is prone to cracking during riveting in the existing cover plate structure during the riveting process.

[0004] In a first aspect, the utility model provides a battery cover plate structure, including:

[0005] A plate body;

[0006] A connecting piece, arranged on one side of the plate body in a first direction, and the connecting piece is suitable for being riveted and fixed with a pole column;

[0007] An insulating piece, arranged between the plate body and the connecting piece, the insulating piece includes a bottom wall and a side wall formed by the circumferential edge around the bottom wall extending away from the bottom wall in the first direction, and the side wall and the bottom wall are suitable for jointly covering the connecting piece;

[0008] A rib structure protrudes from one side of the side wall and / or the bottom wall facing the connecting piece, and the rib structure is suitable for elastically abutting against the connecting piece.

[0009] Beneficial effects: In the battery cover plate structure provided by the utility model, by arranging a rib structure on the side wall and / or the bottom wall of the insulating piece, the rib structure has a certain elasticity, and during the riveting process, the rib structure elastically abuts against the connecting piece, so as to absorb and relieve the riveting pressure through the rib structure, avoiding the occurrence of adverse phenomena such as cracking, cracks, micro-cracks and deformation of the insulating piece caused by fluctuations in parts and equipment during the riveting process, and improving the safety of the battery cover plate structure.

[0010] In an optional implementation manner, the rib structure includes a plurality of first ribs and / or a plurality of second ribs, the plurality of first ribs are arranged at intervals on the bottom wall and form a first material escape space, and the plurality of second ribs are arranged at intervals on the side wall and form a second material escape space.

[0011] Beneficial effect: During the riveting process, the first rib and the second rib simultaneously absorb and relieve the riveting pressure and undergo elastic deformation. During this process, the first rib can be at least partially squeezed and filled into the first escape space, and the second rib can be at least partially squeezed and filled into the second escape space, effectively avoiding the occurrence of adverse phenomena such as cracking and deformation of the insulating parts during riveting.

[0012] In an optional embodiment, the distribution density of the first ribs is greater than the distribution density of the second ribs.

[0013] Beneficial effects: The rib structure can be distributed on the insulating part in a targeted manner according to the stress distribution during the riveting process, effectively avoiding the occurrence of undesirable phenomena such as cracking, fissures, microcracks and deformation of the insulating part during the riveting process. At the same time, the friction can be reduced during the demoulding process of the insulating part, which is beneficial to the demoulding and molding of the insulating part.

[0014] In an optional embodiment, the connecting member includes a first step portion and a second step portion; the side wall includes a third step portion cooperating with the first step portion and a fourth step portion cooperating with the second step portion, and the fourth step portion is arranged on the side of the third step portion away from the bottom wall along the first direction; the third step portion forms a second rib on the side facing the connecting member.

[0015] Beneficial effect: During the assembly process, the first step portion of the connector has a clearance fit with the fourth step portion when passing through the fourth step portion, which facilitates assembly.

[0016] In an optional embodiment, a transition connection portion is formed between the first step portion and the second step portion, and the transition connection portion is suitable for abutting against the second rib.

[0017] Beneficial effect: During the riveting process, the side of the second rib away from the bottom wall along the first direction can slide and adjust relative to the transition connection portion according to the riveting pressure, thereby avoiding the connector from crushing and deforming the side wall.

[0018] In an optional implementation, the height of the rib structure along its own protruding direction is H, and H satisfies 0<H≤0.2mm.

[0019] Beneficial effect: The height H of the rib structure along its own protruding direction satisfies 0<H≤0.2mm, which can not only ensure the rational use of space, but also ensure the supporting strength of the rib structure and ensure that the rib structure effectively absorbs and relieves the riveting pressure.

[0020] In an optional embodiment, a side of the rib structure close to the connecting piece forms an arcuate abutment portion, and the arcuate abutment portion is suitable for abutting against the connecting piece.

[0021] Beneficial effects: On the side of the rib structure close to the connecting piece, an arc-shaped abutting portion is formed, which avoids stress concentration and local deformation of the rib structure, and avoids the generation of particles that can be stripped during the riveting process, thereby avoiding affecting the insulation and sealing of the cover plate.

[0022] In an alternative embodiment, the rib structure and the insulating part are integrally formed.

[0023] Beneficial effects: Thus, it is convenient for the insulating part to be directly injection-molded, which is beneficial to reducing the process difficulty.

[0024] In an alternative embodiment, through holes are provided on the bottom wall, and the through holes are adapted to be coaxially arranged with the pole column.

[0025] Beneficial effects: During the assembly process, the pole column can pass through the through hole along the first direction and be riveted and fixed to the connecting piece.

[0026] In a second aspect, the present invention also provides a battery, including: a battery body, and the battery cover plate structure as described above.

[0027] Beneficial effects: The battery in the second aspect includes the battery cover plate structure in the first aspect. Therefore, the battery in the second aspect includes all the beneficial effects of the battery cover plate structure in the first aspect. Description of the drawings

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic assembly structure diagram of a battery cover plate structure according to an embodiment of the present invention;

[0030] Figure 2 It is Figure 1 a partial enlarged schematic diagram at A in

[0031] Figure 3 It is Figure 1 a partial enlarged schematic diagram at B in

[0032] Figure 4 It is a three-dimensional structure schematic diagram of an insulating part of a battery cover plate structure according to an embodiment of the present invention;

[0033] Figure 5 It is Figure 4 a partial enlarged schematic diagram at C in

[0034] Figure 6 Schematic perspective view of a connecting member of a battery cover plate structure according to an embodiment of the present invention;

[0035] Figure 7 is Figure 1 Schematic cross-sectional view of the insulating member in

[0036] Figure 8 is Figure 7 Partial enlarged view at D in

[0037] Description of reference numerals:

[0038] 10. Plate body;

[0039] 20. Connecting member; 21. First step portion; 22. Second step portion; 23. Transition connecting portion;

[0040] 30. Insulating member; 31. Bottom wall; 311. Through hole; 32. Side wall; 321. Third step portion; 322. Fourth step portion; 33. Rib structure; 331. First rib; 332. Second rib; 333. First flash space; 334. Second flash space; 335. Arc surface abutting portion;

[0041] 40. Terminal post. Detailed implementation manners

[0042] In the related art, the cover plate mostly adopts a riveting structure, which has relatively high requirements for the riveting process. During the riveting process of the cover plate structure, the upper plastic is prone to cracking during riveting due to fluctuations in parts and equipment; cracks, microcracks, and deformations caused by riveting in the upper plastic are difficult to detect. On the one hand, the scrap cost is high. On the other hand, there is a risk of performance realization for the cover plate. On the other hand, the deformation of the cover plate shape is likely to cause poor assembly of the battery cell and the module.

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0044] Next, in combination with Figures 1 to 8 , the embodiments of the present invention will be described.

[0045] According to an embodiment of the present invention, on the one hand, a battery cover plate structure is provided, including:

[0046] Plate body 10;

[0047] The connecting member 20 is disposed on one side of the plate body 10 in the first direction, and the connecting member 20 is adapted to be riveted and fixed to the pole column 40;

[0048] The insulating member 30 is disposed between the plate body 10 and the connecting member 20. The insulating member 30 includes a bottom wall 31 and a side wall 32 extending away from the bottom wall 31 in the first direction along the circumferential edge surrounding the bottom wall 31. The side wall 32 and the bottom wall 31 are adapted to jointly cover the connecting member 20;

[0049] On the side of the side wall 32 and / or the bottom wall 31 facing the connecting member 20, a rib structure 33 is protruded. The rib structure 33 has a certain elasticity, and the rib structure 33 is adapted to elastically abut against the connecting member 20.

[0050] In the battery cover structure provided by the present utility model, by providing the rib structure 33 on the side wall 32 and / or the bottom wall 31 of the insulating member 30, the rib structure 33 has a certain elasticity, and during the riveting process, the rib structure 33 elastically abuts against the connecting member 20, so as to absorb and relieve the pressure of riveting through the rib structure 33, and avoid the occurrence of bad phenomena such as cracking, fissures, microcracks and deformation of the insulating member 30 caused by the fluctuations of parts and equipment during the riveting process, thereby improving the safety of the battery cover structure.

[0051] Further, the insulating member 30 can be made of an elastic insulating material.

[0052] Further, a clearance fit can be adopted between the side wall 32 of the insulating member 30 and the connecting member 20, which is easy to assemble.

[0053] In some embodiments, please refer to Figure 3 and Figure 4 As shown, the rib structure 33 includes a plurality of first ribs 331 and / or a plurality of second ribs 332. Please also refer to Figure 5 As shown, a plurality of first ribs 331 are spaced apart on the bottom wall 31 to form a first material escape space 333, and a plurality of second ribs 332 are spaced apart on the side wall 32 to form a second material escape space 334.

[0054] Further, the second ribs 332 are arranged on the side wall 32 in the first direction, so as to facilitate the demolding of the insulating member 30 and at the same time facilitate the assembly of the connecting member 20 and the insulating member 30.

[0055] Further, a plurality of first ribs 331 are evenly spaced on the bottom wall 31 in the second direction and / or the third direction, and a first material escape space 333 is formed between every two adjacent first ribs 331; a plurality of second ribs 332 are evenly spaced on the side wall 32, and a second material escape space 334 is formed between every two adjacent second ribs 332, so as to form a "grille" - shaped buffer structure on the bottom wall 31 and the side wall 32 respectively, thereby absorbing and relieving the pressure of riveting.

[0056] During the riveting process, the first rib 331 and the second rib 332 simultaneously absorb and relieve the riveting pressure and undergo elastic deformation. During this process, the first rib 331 can be at least partially squeezed and filled into the first escape space 333, and the second rib 332 can be at least partially squeezed and filled into the second escape space 334, effectively avoiding the occurrence of adverse phenomena such as cracking and deformation of the insulating part 30 during riveting.

[0057] In some embodiments, see Figure 4 As shown, the distribution density of the first rib 331 is greater than the distribution density of the second rib 332, so that the rib structure 33 can be distributed on the insulating part 30 in a targeted manner according to the stress distribution during the riveting process, effectively avoiding the occurrence of undesirable phenomena such as cracking, cracks, microcracks and deformation of the insulating part 30 during the riveting process, and at the same time, it can reduce friction during the demolding process of the insulating part 30, which is beneficial to the demolding and molding of the insulating part 30.

[0058] In some embodiments, see Figure 3 As shown, the connecting member 20 includes a first step portion 21 and a second step portion 22; the side wall 32 includes a third step portion 321 that cooperates with the first step portion 21 and a fourth step portion 322 that cooperates with the second step portion 22, the fourth step portion 322 is arranged on the side of the third step portion 321 away from the bottom wall 31 along the first direction, and the distance between the fourth step portion 322 and the central axis of the insulating member 30 is greater than the distance between the third step portion 321 and the central axis of the insulating member 30; the third step portion 321 forms a second rib 332 on the side of the connecting member 20.

[0059] In this embodiment, the side wall 32 of the insulating member 30 is formed by forming a third step portion 321 and a fourth step portion 322, and a second rib 332 is formed on the third step portion 321. During the assembly process, the first step portion 21 of the connecting member 20 has a clearance fit with the fourth step portion 322 when passing through the fourth step portion 322, which facilitates assembly.

[0060] In some embodiments, see Figure 3 As shown, a transition connection portion 23 can be formed between the first step portion 21 and the second step portion 22 by chamfering. The transition connection portion 23 is arranged at an angle to the first step portion 21 and the second step portion 22. During the riveting process, the side of the second rib 332 away from the bottom wall 31 along the first direction can slide relative to the transition connection portion 23 and adjust according to the magnitude of the riveting pressure, thereby avoiding the connector 20 from crushing and deforming the side wall 32.

[0061] In some embodiments, see Figure 8As shown, the height of the rib structure 33 along its protruding direction is H, and H satisfies 0 < H ≤ 0.2 mm.

[0062] It should be noted that, please refer to Figure 8 As shown, the rib structure 33 includes a first rib 331 and a second rib 332. The heights of the first rib 331 and the second rib 332 along their respective protruding directions are both H. The rib structure 33 needs to have a certain protruding height to absorb and relieve the pressure of riveting through the elastic deformation of the rib structure 33. Therefore, the height H of the rib structure 33 along its protruding direction also needs to satisfy H > 0. The protruding height of the rib structure 33 cannot be too large, otherwise it will not only occupy a large space, but also easily lead to insufficient support strength of the rib structure 33 and cannot effectively absorb and relieve the pressure of riveting. Therefore, the height H of the rib structure 33 along its protruding direction needs to satisfy H ≤ 0.2 mm.

[0063] In this embodiment, by satisfying 0 < H ≤ 0.2 mm for the height H of the rib structure 33 along its protruding direction, it can not only ensure the reasonable utilization of space, but also ensure the support strength of the rib structure 33 and ensure that the rib structure 33 effectively absorbs and relieves the pressure of riveting.

[0064] As a more preferred embodiment, the height H of the rib structure 33 along its protruding direction can further satisfy 0.06 mm ≤ H ≤ 0.2 mm.

[0065] In some embodiments, please refer to Figure 8 As shown, an arc-shaped abutting portion 335 is formed on one side of the rib structure 33 close to the connecting member 20, and the arc-shaped abutting portion 335 is adapted to abut against the connecting member 20.

[0066] In this embodiment, by forming the arc-shaped abutting portion 335 on one side of the rib structure 33 close to the connecting member 20, stress concentration and local deformation of the rib structure 33 are avoided, and particles that can be stripped during riveting of the rib structure 33 are avoided, thereby avoiding affecting the insulation and sealing of the cover plate.

[0067] In some embodiments, the rib structure 33 and the insulating member 30 are an integrally formed structure, which is convenient for directly injection molding the insulating member 30, has a high process maturity, and is beneficial to reducing the process difficulty.

[0068] In some embodiments, please refer to Figure 4 As shown, a through hole 311 is formed on the bottom wall 31, and the through hole 311 is adapted to be coaxially arranged with the pole column 40.

[0069] During the assembly process, the pole column 40 can pass through the through hole 311 along the first direction and be riveted and fixed to the connecting member 20.

[0070] According to an embodiment of the present utility model, on the other hand, a battery is further provided, including: a battery body and the battery cover plate structure as described above.

[0071] The battery in this embodiment includes the above-mentioned battery cover plate structure. Therefore, the battery in this embodiment includes all the beneficial effects of the above-mentioned battery cover plate structure.

[0072] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery cover structure, characterized in that: include: plate body; A connecting piece, arranged on one side of the plate body in the first direction, and suitable for being riveted and fixed to the pole; An insulating member, disposed between the plate body and the connecting member, the insulating member comprising a bottom wall and a side wall extending along a first direction away from the bottom wall around a circumferential edge of the bottom wall, the side wall and the bottom wall being suitable for covering the connecting member together; The side wall and / or the bottom wall protrudes toward one side of the connecting member to form a convex rib structure, and the convex rib structure is suitable for elastically abutting against the connecting member.

2. The battery cover structure according to claim 1, characterized in that: The convex rib structure includes a plurality of first convex ribs and / or a plurality of second convex ribs, wherein the plurality of first convex ribs are arranged at intervals on the bottom wall to form a first material escape space, and the plurality of second convex ribs are arranged at intervals on the side wall to form a second material escape space.

3. The battery cover structure according to claim 2, characterized in that: The distribution density of the first convex ribs is greater than the distribution density of the second convex ribs.

4. The battery cover structure according to claim 2, characterized in that: The connecting member includes a first step portion and a second step portion; the side wall includes a third step portion matching the first step portion and a fourth step portion matching the second step portion, and the fourth step portion is arranged on a side of the third step portion away from the bottom wall along the first direction; the third step portion forms the second rib on a side facing the connecting member.

5. The battery cover structure according to claim 4, characterized in that: A transition connection portion is formed between the first step portion and the second step portion, and the transition connection portion is suitable for abutting against the second rib.

6. The battery cover structure according to claim 1, characterized in that: The height of the convex rib structure along its own protruding direction is H, and H satisfies 0<H≤0.2mm.

7. The battery cover structure according to claim 1, characterized in that: A side of the rib structure close to the connecting piece forms an arcuate abutment portion, and the arcuate abutment portion is suitable for abutting against the connecting piece.

8. The battery cover structure according to claim 1, characterized in that: The convex rib structure and the insulating member are an integrally formed structure.

9. The battery cover structure according to any one of claims 1 to 8, characterized in that: The bottom wall is provided with a through hole, and the through hole is suitable for being coaxially arranged with the pole.

10. A battery, characterized in that: include: A battery body, and a battery cover structure as claimed in any one of claims 1 to 9.

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