Battery cover plate and single battery
By designing a convex ring and a rotary stop hole on the battery cover, and using the first insulating member to fill the rotary stop hole and cover the convex ring, the problem of unsatisfied stop effect of the existing lithium battery cover is solved, and a better stop effect and a reduction in production cost is achieved.
Patent Information
- Application Number
- CN202421734858.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The plastic stopping effect of the existing lithium battery cover is not ideal, which causes the pole column to rotate around, affecting the sealing and service life. The existing stopping structure is too complex, which increases production costs.
A battery cover plate is designed, which includes a convex ring and a mounting hole. The convex ring is provided with a rotary stop hole, and the pole column is penetrated into the mounting hole. The first insulating member is covered on the outer circumference of the pole column and the inner and outer walls of the convex ring, and is filled with the rotary stop hole to improve the rotary stop effect.
The stopping effect of the first insulator is effectively improved, the stopping structure is simplified, the production cost is reduced, and the service life of the single battery is extended.
Smart Images
Figure CN222867828U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a single battery. Background Art
[0002] Current lithium batteries generally include a shell and a cover plate on the top, on which a pole and an upper plastic for fixing the pole are arranged. After the upper plastic is assembled on the cover plate, its stability needs to be ensured to prevent it from rotating around the pole, which may affect the sealing of the pole and even cause adverse phenomena such as pole settlement, directly affecting the use effect and life of the lithium battery.
[0003] The existing partial upper plastic anti-rotation structure does not have an ideal anti-rotation effect on the upper plastic, and the structure of the other partial anti-rotation structure is too complicated, which increases the production cost.
[0004] Therefore, it is urgent to propose a battery cover and a single battery to solve the above technical problems. Utility Model Content
[0005] The first object of the utility model is to provide a battery cover plate, which has a better anti-rotation effect on the first insulating member and a simple anti-rotation structure, which is conducive to reducing production costs.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] Battery cover, including:
[0008] The cover plate body is provided with a convex ring and a mounting hole, the convex ring is coaxial with the mounting hole, the convex ring is provided with at least two anti-rotation holes, and the at least two anti-rotation holes are arranged at intervals along the circumference of the convex ring;
[0009] A pole, the pole is passed through the mounting hole;
[0010] A first insulating member, part of which is wrapped around the outer periphery of the pole and sandwiched between the side wall of the pole and the inner wall of the convex ring, and each anti-rotation hole is filled with the first insulating member.
[0011] Optionally, part of the first insulating member is wrapped around the outer circumference of the protruding ring.
[0012] Optionally, the first insulating member located in the anti-rotation hole is respectively connected to the first insulating member located on the inner wall of the convex ring and the first insulating member located on the outer wall of the convex ring.
[0013] Optionally, part of the first insulating member is wrapped around a side of the convex ring facing away from the cover plate body.
[0014] Optionally, at least two anti-rotation holes are evenly distributed along the circumference of the convex ring.
[0015] Optionally, the inner diameter of the protruding ring is larger than the hole diameter of the mounting hole.
[0016] Optionally, the cover plate body located inside the convex ring is partially covered by the first insulating member.
[0017] Optionally, the minimum distance between the hole wall of the anti-rotation hole and the cover plate body is a, 0.1mm≤a≤4mm.
[0018] Optionally, a side wall of the pole is provided with a groove, the groove extends along the circumference of the pole and is in a closed loop structure, and part of the first insulating member is filled in the groove.
[0019] The second object of the utility model is to provide a single battery with better use effect and longer service life, and also with lower production cost.
[0020] To achieve this purpose, the utility model adopts the following technical solutions:
[0021] The single battery comprises a battery shell, a battery core and the above-mentioned battery cover plate, wherein the battery core is arranged in the battery shell, and the cover plate body is arranged on the opening of the battery shell.
[0022] Beneficial effects of the utility model:
[0023] A convex ring coaxial with the mounting hole is provided on the cover body, and at least two anti-rotation holes are provided at intervals along the circumference of the convex ring. The pole is passed through the mounting hole, and part of the first insulating member is covered on the outer circumference of the pole and clamped between the side wall of the pole and the inner wall of the convex ring, and each anti-rotation hole is filled with the first insulating member. This structure in which the first insulating member fills the anti-rotation hole effectively improves the anti-rotation effect of the first insulating member, and at least two anti-rotation holes are provided on the convex ring, and at least two anti-rotation holes are arranged at intervals along the circumference of the convex ring, which further improves the anti-rotation effect of the first insulating member. In addition, the anti-rotation structure of the battery cover is relatively simple, which has the effect of reducing production costs.
[0024] The single cell battery provided by the utility model adopts the above-mentioned battery cover plate, which can play a good anti-rotation effect on the first insulating member, and the anti-rotation structure of the first insulating member is relatively simple. On the basis of improving the use effect of the single cell battery and extending the service life of the single cell battery, the production cost of the single cell battery can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the exploded structure of the battery cover provided by the embodiment of the utility model;
[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of a battery cover provided by an embodiment of the utility model;
[0027] Figure 3 yes Figure 2A schematic diagram of the local enlarged structure at point A in the middle;
[0028] Figure 4 It is a partial enlarged structural schematic diagram of the cover plate body provided in the embodiment of the utility model;
[0029] Figure 5 It is a schematic diagram of the structure of the pole provided by the embodiment of the utility model.
[0030] In the figure:
[0031] 100, cover body; 110, convex ring; 111, anti-rotation hole; 120, mounting hole; 200, pole; 210, groove; 220, protrusion; 300, first insulating member; 400, second insulating member; 500, sealing ring. DETAILED DESCRIPTION
[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0036] This embodiment provides a battery cover plate, which has a good anti-rotation effect on the first insulating member and a simple anti-rotation structure, which is conducive to reducing production costs.
[0037] Specifically, Figures 1 to 4 As shown, the battery cover includes a cover body 100, a pole 200 and a first insulating member 300, wherein the cover body 100 is provided with a convex ring 110 and a mounting hole 120, the convex ring 110 is coaxial with the mounting hole 120, the convex ring 110 is provided with at least two anti-rotation holes 111, and the at least two anti-rotation holes 111 are arranged at intervals along the circumference of the convex ring 110, the pole 200 is passed through the mounting hole 120, a portion of the first insulating member 300 is covered on the outer circumference of the pole 200 and is clamped between the side wall of the pole 200 and the inner wall of the convex ring 110, and each anti-rotation hole 111 is filled with the first insulating member 300.
[0038] Based on the above design, a convex ring 110 coaxial with the mounting hole 120 is provided on the cover body 100, and at least two stop holes 111 are provided at intervals along the circumference of the convex ring 110, and the pole 200 is passed through the mounting hole 120, and part of the first insulating member 300 is covered on the outer periphery of the pole 200 and clamped between the side wall of the pole 200 and the inner wall of the convex ring 110, and each stop hole 111 is filled with the first insulating member 300. This structure in which the first insulating member 300 fills the stop hole 111 effectively improves the stop effect on the first insulating member 300, and at least two stop holes 111 are provided on the convex ring 110, and at least two stop holes 111 are arranged at intervals along the circumference of the convex ring 110, which further improves the stop effect on the first insulating member 300. In addition, the stop structure of the battery cover is relatively simple, which has the effect of reducing production costs.
[0039] On the other hand, in the prior art, after the electrolyte is added to the single cell, some electrolyte often remains on the surface of the cover body 100. The residual electrolyte easily flows into the inside of the battery cover through the gap between the first insulating member 300 and the cover body 100, and flows to the gap between the pole 200 and the cover body 100. If the electrolyte in the gap crystallizes, the electrolyte liquid crystal easily causes a micro short circuit between the cover body 100 and the pole 200, affecting the performance of the single cell. The battery cover provided in this embodiment is provided with a convex ring 110 on the cover body 100. The setting of the convex ring 110 can play a role of blocking the residual electrolyte on the cover body 100, preventing the residual electrolyte on the cover body 100 from entering the inside of the battery cover, reducing the probability of a micro short circuit between the cover body 100 and the pole 200, and improving the performance of the single cell.
[0040] Furthermore, at least two anti-rotation holes 111 are evenly distributed along the circumference of the protruding ring 110 to improve the uniformity of the anti-rotation effect on the first insulating member 300 .
[0041] It is understandable that the number of the anti-rotation holes 111 can be two, four, five or even more. Figures 1 to 4 As shown, in this embodiment, the number of the stop holes 111 is four, and the number of the stop holes 111 can be determined according to the circumference of the protruding ring 110 .
[0042] Alternatively, if Figures 1 to 4 As shown, part of the first insulating member 300 is covered on the outer periphery of the convex ring 110 , which enlarges the contact area between the first insulating member 300 and the cover body 100 , and is beneficial to improving the anti-rotation effect of the first insulating member 300 .
[0043] Furthermore, if Figures 1 to 4 As shown, part of the first insulating member 300 is wrapped around the side of the convex ring 110 facing away from the cover body 100, that is, the convex ring 110 is completely wrapped in the first insulating member 300, thereby achieving insulation treatment of the convex ring 110 and also expanding the contact area between the first insulating member 300 and the cover body 100.
[0044] Furthermore, if Figures 1 to 4 As shown, the first insulating member 300 located in the anti-rotation hole 111 is respectively connected to the first insulating member 300 located on the inner wall of the protruding ring 110 and the first insulating member 300 located on the outer wall of the protruding ring 110 to further improve the anti-rotation effect of the first insulating member 300.
[0045] Alternatively, if Figures 1 to 4As shown, the minimum spacing between the hole wall of the stop hole 111 and the cover body 100 is a, 0.1mm≤a≤4mm. For example, a can be 0.1mm, 0.5mm, 1mm, 3mm or 4mm, etc. If a is less than 0.1mm, when electrolyte remains on the cover body 100, the electrolyte can easily enter the inner side of the convex ring 110 through the stop hole 111, and then enter the interior of the battery cover, and flow to the gap between the pole 200 and the cover body 100. If the electrolyte crystallizes, it will cause a micro short circuit between the pole 200 and the cover body 100, affecting the performance of the single cell. If a is greater than 4mm, the height of the convex ring 110 will be too high (that is, the distance between the side of the convex ring 110 away from the cover body 100 and the cover body 100), thereby increasing the weight of the battery cover, which is not conducive to improving the energy density of the single cell.
[0046] Alternatively, if Figures 1 to 4 As shown, the inner diameter of the convex ring 110 is larger than the aperture of the mounting hole 120, that is, a certain distance is left between the inner wall of the convex ring 110 and the inner wall of the mounting hole 120. When the pole 200 is subjected to radial thrust, this structural design can reduce the probability of the pole 200 bending relative to the cover body 100.
[0047] Furthermore, if Figures 1 to 4 As shown, the cover body 100 located inside the convex ring 110 is partially covered by the first insulating member 300 , which enlarges the contact area between the first insulating member 300 and the cover body 100 , and is beneficial to improving the anti-rotation effect of the first insulating member 300 .
[0048] Alternatively, if Figures 1 to 5 As shown, a groove 210 is provided on the side wall of the pole 200 . The groove 210 extends along the circumference of the pole 200 and is a closed loop structure. Part of the first insulating member 300 is filled in the groove 210 to increase the torque value between the pole 200 and the first insulating member 300 .
[0049] Alternatively, if Figures 1 to 5 As shown, the battery cover provided in this embodiment further includes a second insulating member 400 , which covers the surface of the cover body 100 away from the protruding ring 110 to achieve insulation of the surface of the cover body 100 away from the protruding ring 110 .
[0050] Alternatively, if Figures 1 to 5 As shown, the battery cover provided in this embodiment also includes a sealing ring 500, a protrusion 220 is provided on the side wall of the pole 200, the sealing ring 500 is sleeved on the pole 200, and the sealing ring 500 is clamped between the protrusion 220 and the cover body 100 to achieve sealing between the pole 200 and the cover body 100.
[0051] In this embodiment, Figure 1As shown, the number of the poles 200, the sealing ring 500, the convex ring 110 and the first insulating member 300 are two and they correspond one to one. One of the two poles 200 is a positive pole and the other is a negative pole.
[0052] The cover body 100 is made of a plain aluminum plate, and the first insulating member 300 and the second insulating member 400 are both injection molded parts. Of course, in other embodiments, the cover body 100, the first insulating member 300 and the second insulating member 400 can also be made of other common materials in the art, which will not be repeated here.
[0053] This embodiment also provides a single cell battery, which has better use effect and longer service life, and also has lower production cost.
[0054] Specifically, the single cell includes a battery shell, a battery cell and the above-mentioned battery cover, the battery cell is arranged in the battery shell, and the cover body 100 is arranged to cover the opening of the battery shell. The single cell adopts the above-mentioned battery cover, which can play a good anti-rotation effect on the first insulating member 300, and the anti-rotation structure of the first insulating member 300 is relatively simple, which can reduce the production cost of the single cell while improving the use effect of the single cell and extending the service life of the single cell.
[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A battery cover, characterized in that: include: A cover plate body (100), the cover plate body (100) being provided with a convex ring (110) and a mounting hole (120), the convex ring (110) being coaxial with the mounting hole (120), the convex ring (110) being provided with at least two anti-rotation holes (111), and the at least two anti-rotation holes (111) being arranged at intervals along the circumference of the convex ring (110); A pole (200), the pole (200) being inserted into the mounting hole (120); A first insulating member (300), part of which is wrapped around the outer periphery of the pole (200) and sandwiched between the side wall of the pole (200) and the inner wall of the convex ring (110), and each of the anti-rotation holes (111) is filled with the first insulating member (300).
2. The battery cover according to claim 1, characterized in that: Part of the first insulating member (300) is covered on the outer circumference of the convex ring (110).
3. The battery cover according to claim 2, characterized in that: The first insulating member (300) located in the anti-rotation hole (111) is respectively connected to the first insulating member (300) located on the inner wall of the convex ring (110) and the first insulating member (300) located on the outer wall of the convex ring (110).
4. The battery cover according to any one of claims 1 to 3, characterized in that: A portion of the first insulating member (300) is wrapped around a side of the protruding ring (110) that is away from the cover plate body (100).
5. The battery cover according to any one of claims 1 to 3, characterized in that: At least two of the anti-rotation holes (111) are evenly distributed along the circumference of the convex ring (110).
6. The battery cover according to any one of claims 1 to 3, characterized in that: The inner diameter of the convex ring (110) is larger than the hole diameter of the mounting hole (120).
7. The battery cover according to claim 6, characterized in that: The cover plate body (100) located inside the convex ring (110) is partially covered by the first insulating member (300).
8. The battery cover according to any one of claims 1 to 3, characterized in that: The minimum distance between the hole wall of the anti-rotation hole (111) and the cover plate body (100) is a, 0.1 mm≤a≤4 mm.
9. The battery cover according to any one of claims 1 to 3, characterized in that: A groove (210) is provided on the side wall of the pole (200), the groove (210) extending along the circumference of the pole (200) and presenting a closed loop structure, and part of the first insulating member (300) is filled in the groove (210).
10. A single cell, characterized in that: It comprises a battery shell, a battery cell and the battery cover plate according to any one of claims 1 to 9, wherein the battery cell is arranged in the battery shell, and the cover plate body (100) is covered at the opening of the battery shell.