Battery top cover structure and battery

Abstract

The utility model provides a battery top cover structure and a battery. The utility model provides a battery top cover structure. The battery top cover structure comprises a cover plate and a pole assembly arranged on the cover plate, at least one first pole hole is formed in the cover plate, and the pole assembly corresponds to the first pole hole; the pole assembly comprises a pole and a sealing assembly; the pole is arranged in the first pole hole in a penetrating manner, and a plurality of grooves are formed in the pole; and the sealing assembly is arranged between the cover plate and the pole. The heat dissipation area of the surface of the pole column is increased through the groove formed in the pole column, so that the heat dissipation efficiency of the battery is improved, the sealing assemblies including the sealing ring around the pole column are protected from being damaged by high temperature, the service life of the battery is prolonged, and the safety of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of new energy batteries, and in particular to a battery top cover structure and a battery. Background Technology

[0002] As an essential component of new energy equipment, batteries are widely used in various applications, including electric vehicles, home energy storage, portable batteries, and digital batteries. The battery top cover is a crucial part of the battery, connecting the internal and external circuits. Because the battery's internal structure needs to be isolated from the outside, the sealing of the top cover, especially at the terminals, is extremely important. Typically, fluororubber sealing rings are used at the terminals. The lower surface of the terminal needs to be welded to an adapter plate, and the upper surface needs to be welded to a contact plate. Welding generates high temperatures, which can cause the sealing rings to fail, leading to cell leakage. Furthermore, the battery generates significant heat during charging and discharging, especially at high rates. Excessive heat can also cause the sealing rings to fail, posing a battery safety risk.

[0003] To reduce the impact of high welding temperatures on the sealing ring, existing technologies typically increase the volume of the terminal post, providing a larger welding area. This allows the welding process to avoid the sealing ring area, reducing the impact of high welding temperatures on the sealing ring. However, increasing the size of the terminal post increases costs and battery weight, and it cannot fundamentally solve the problem of heat generated by the terminal post during high-rate charging and discharging affecting the sealing ring. Utility Model Content

[0004] The purpose of this utility model is to provide a battery terminal and a battery to solve the technical problem in the prior art where heat generation during welding or high-rate charging and discharging of battery terminals damages the sealing ring.

[0005] The technical solution of this utility model is as follows: a battery top cover structure is provided, including a cover plate and an electrode assembly disposed on the cover plate;

[0006] The cover plate is provided with at least one first pole hole, and the pole assembly is provided corresponding to the first pole hole;

[0007] The electrode assembly includes an electrode and a sealing assembly;

[0008] The electrode post passes through the first electrode post hole, and the electrode post has several grooves; the sealing assembly is located between the cover plate and the electrode post.

[0009] Furthermore, the pole post includes a protrusion and a stepped portion, the stepped portion being located on one side of the cover plate, the protrusion passing through the first pole post hole, and a plurality of the grooves being provided on the stepped portion.

[0010] Furthermore, the groove is an arc-shaped groove.

[0011] Furthermore, the sealing assembly includes an upper plastic, a lower plastic, and a sealing ring;

[0012] The upper plastic is disposed on the first surface of the cover plate and sleeved on the pole post;

[0013] The lower plastic is disposed on the second side of the cover plate, and the lower plastic is provided with at least one second pole hole, the pole being inserted through the second pole hole;

[0014] The sealing ring is disposed between the pole post and the cover plate, and is sleeved on the pole post.

[0015] Furthermore, the cover plate is provided with an explosion-proof valve, and the lower plastic is provided with a mesh-like perforated structure, the position of which is opposite to the position of the explosion-proof valve.

[0016] Furthermore, the cover plate is provided with a first injection hole, and the lower plastic is provided with a second injection hole, the first injection hole and the second injection hole corresponding to each other.

[0017] Furthermore, all of the sealing components are made of insulating material.

[0018] Furthermore, the cover plate is made of aluminum or aluminum alloy.

[0019] Furthermore, the cover plate and the sealing assembly are fixed by ultrasonic welding.

[0020] This utility model also provides a battery, including the battery top cover structure as described in any of the above technical solutions.

[0021] The beneficial effects of this utility model are as follows: by setting grooves on the terminals, the heat dissipation area of ​​the terminal surface is increased, so that when the terminals are heated or generate heat during welding or high-rate charging and discharging, the heat can be quickly dissipated to the outside, thereby improving the heat dissipation efficiency of the battery, and thus protecting the sealing components around the terminals, including the sealing ring, from high-temperature damage, thereby improving the battery's service life and safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the battery top cover structure according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the electrode post structure of the battery top cover structure according to an embodiment of the present invention.

[0024] Reference numerals: 10-Cover plate; 20-Pole post assembly; 21-Pole post; 211-Protrusion; 212-Stepped portion; 2121-Groove; 22-Sealing assembly; 221-Upper plastic; 222-Lower plastic; 223-Sealing ring; 31-First pole post hole; 32-Second pole post hole; 40-Explosion-proof valve; 41-Explosion-proof patch; 50-Hollow structure; 61-First injection hole; 62-Second injection hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] Figure 1 This is a schematic diagram of the battery top cover structure according to an embodiment of the present invention. It should be noted that if substantially the same result is achieved, the embodiment of the present invention is not necessarily identical. Figure 1 The structures shown are limited. For example... Figure 1 As shown, the battery top cover structure includes a cover plate 10 and an electrode post assembly 20 disposed on the cover plate 10;

[0028] The cover plate 10 is provided with at least one first pole hole 31, and the pole assembly 20 is provided corresponding to the first pole hole 31.

[0029] The pole assembly 20 includes a pole 21 and a sealing assembly 22;

[0030] The pole post 21 passes through the first pole post hole 31, and the pole post 21 is provided with a plurality of grooves 2121; the sealing assembly 22 is disposed between the cover plate 10 and the pole post 21.

[0031] In this embodiment, the sealing component 22 is placed between the cover plate 10 and the terminal post 21 to seal the first terminal post hole 31. The groove 2121 provided on the terminal post 21 increases the heat dissipation area of ​​the terminal post 21, so that the terminal post 21 can quickly dissipate heat to the outside when it is heated during welding or high-rate charging and discharging, thereby improving the heat dissipation efficiency of the battery. This protects the sealing component 22, including the sealing ring 223, around the terminal post 21 from high-temperature damage, and improves the battery's service life and safety.

[0032] In some embodiments, Figure 2 This is a schematic diagram of the electrode post structure of the battery top cover structure according to an embodiment of the present invention, as shown below. Figure 2 As shown, the pole post 21 includes a protrusion 211 and a stepped portion 212. The stepped portion 212 is located on one side of the cover plate 10. The protrusion 211 passes through the first pole post hole 31, and a plurality of grooves 2121 are provided on the stepped portion 212.

[0033] In this embodiment, the terminal post 21 includes a protrusion 211 and a stepped portion 212. By inserting the protrusion 211 through the first terminal post hole 31 and limiting the stepped portion 212 to one side of the cover plate 10, the terminal post 21 can be more firmly fixed, preventing it from falling off and thus increasing the stability of the entire battery cover plate 10 structure. In a specific embodiment, the groove 2121 on the terminal post 21 can be provided at any location on the terminal post 21, not just on the stepped portion 212.

[0034] In some embodiments, the groove 2121 is an arc-shaped groove.

[0035] In this embodiment, the groove 2121 provided on the step portion 212 is an arc-shaped groove 2121. The arc-shaped groove can increase the space utilization efficiency and can be formed by stamping or machining.

[0036] In one specific embodiment, the form of the groove 2121 is not limited to an arc-shaped groove, but can be any other shape of groove, as long as it can increase the heat dissipation area of ​​the pole post 21 by increasing the surface area of ​​the pole post 21, all of which are within the protection scope of this solution.

[0037] In some embodiments, the sealing assembly 22 includes an upper plastic 221, a lower plastic 222, and a sealing ring 223;

[0038] The upper plastic 221 is disposed on the first surface of the cover plate 10 and sleeved on the pole post 21;

[0039] The lower plastic 222 is disposed on the second side of the cover plate 10, and the lower plastic 222 is provided with at least one second pole hole 32, and the pole 21 passes through the second pole hole 32;

[0040] The sealing ring 223 is disposed between the pole post 21 and the cover plate 10, and is sleeved on the pole post 21.

[0041] In this embodiment, the upper plastic 221 is an annular structure, fitted onto the portion of the pole post 21 that protrudes from the first surface of the cover plate 10, i.e., the portion where the protrusion 211 extends out of the cover plate 10, to seal the first pole post hole 31 near the first surface of the cover plate 10; the lower plastic 222 is an integrated hollow frame structure, with at least one second pole post hole 32 on it. After the pole post 21 passes through the second pole post hole 32, the lower plastic 222 is used to support the pole post 21; the sealing ring 223 is also an annular structure, fitted onto the portion of the pole post 21 near the second surface of the cover plate 10, i.e., the portion where the protrusion 211 does not extend out of the cover plate 10, to seal the first pole post hole 31 near the second surface of the cover plate 10.

[0042] In some embodiments, the cover plate 10 is provided with an explosion-proof valve 40, and the lower plastic 222 is provided with a mesh hollow structure 50, the position of the mesh hollow structure 50 being opposite to the position of the explosion-proof valve 40.

[0043] In this embodiment, the cover plate 10 is equipped with an explosion-proof valve 40. When the internal pressure or temperature of the battery is too high, the valve automatically opens to directly dissipate the high-pressure gas inside, thereby achieving the purpose of explosion prevention. The explosion-proof valve 40 is also equipped with an explosion-proof patch 41 that works in conjunction with it. A mesh-like hollow structure 50 is provided on the lower plastic 222. The position of the mesh-like hollow structure 50 is opposite to the position of the explosion-proof valve 40. On the one hand, the mesh-like hollow structure 50 is designed for the operation and opening of the explosion-proof valve 40. On the other hand, the mesh-like hollow structure 50 can reduce the internal stress of the lower plastic 222 and improve the structural strength during the liquid injection process.

[0044] In some embodiments, the cover plate 10 is further provided with a first injection hole 61, and the lower plastic 222 is provided with a second injection hole 62, the first injection hole 61 and the second injection hole 62 corresponding to each other.

[0045] In this embodiment, by providing corresponding first injection hole 61 and second injection hole 62, it is convenient to inject electrolyte into the battery.

[0046] In some embodiments, the sealing components 22 are all made of insulating material.

[0047] In this embodiment, the excellent electrical insulation properties of the insulating material prevent short circuits between the terminal post 21 and other components, avoiding safety accidents such as high temperatures and fires caused by short circuits and improving safety. Simultaneously, the insulating material also possesses good physical properties such as resistance to high and low temperatures and abrasion resistance. These properties enable the sealing assembly 22 to remain stable in various complex environments, further enhancing the safety performance of the battery top cover structure.

[0048] In some embodiments, the cover plate 10 is made of aluminum or aluminum alloy.

[0049] In this embodiment, aluminum is chosen as the material for the cover plate 10 because aluminum has a much higher thermal conductivity than many other materials, including plastics and certain metals. This means that the cover plate 10 made of aluminum or aluminum alloy can more effectively conduct the heat generated inside the battery to the external environment, thereby preventing the battery from overheating and improving the battery's safety and stability.

[0050] In some embodiments, the cover plate 10 and the sealing assembly 22 are fixed by ultrasonic welding.

[0051] In this embodiment, the sealing component 22 is welded to the cover plate 10 by ultrasonic welding, which can improve the welding yield and also improve the safety of the battery top cover structure.

[0052] This utility model also provides a battery, including the battery top cover structure as described in any of the above technical solutions.

[0053] The beneficial effects of this utility model are as follows: by setting the groove 2121 on the terminal post 21, the heat dissipation area of ​​the terminal post 21 is increased, so that when the terminal post 21 is heated or generates heat during welding or high-rate charging and discharging, the heat can be quickly dissipated to the outside, thereby improving the heat dissipation efficiency of the battery, and thus protecting the sealing components 22 around the terminal post 21, including the sealing ring 223, from high temperature damage, thereby improving the battery's service life and safety.

[0054] The above description is merely an embodiment of the present utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present utility model, but these improvements all fall within the protection scope of the present utility model.

Claims

1. A battery top cover structure, characterized in that, Includes a cover plate and an electrode assembly disposed on the cover plate; The cover plate is provided with at least one first pole hole, and the pole assembly is provided corresponding to the first pole hole; The electrode assembly includes an electrode and a sealing assembly; The electrode post passes through the first electrode post hole, and the electrode post has several grooves; the sealing assembly is located between the cover plate and the electrode post.

2. The battery top cover structure according to claim 1, characterized in that, The pole post includes a protrusion and a stepped portion. The stepped portion is located on one side of the cover plate. The protrusion passes through the first pole post hole, and a plurality of grooves are provided on the stepped portion.

3. The battery top cover structure according to claim 1, characterized in that, The groove is an arc-shaped groove.

4. The battery top cover structure according to claim 1, characterized in that, The sealing assembly includes an upper plastic component, a lower plastic component, and a sealing ring; The upper plastic is disposed on the first surface of the cover plate and sleeved on the pole post; The lower plastic is disposed on the second side of the cover plate, and the lower plastic is provided with at least one second pole hole, the pole being inserted through the second pole hole; The sealing ring is disposed between the pole post and the cover plate, and is sleeved on the pole post.

5. The battery top cover structure according to claim 4, characterized in that, The cover plate is equipped with an explosion-proof valve, and the lower plastic has a mesh-like perforated structure, the position of which is opposite to the position of the explosion-proof valve.

6. The battery top cover structure according to claim 4, characterized in that, The cover plate is also provided with a first injection hole, and the lower plastic is provided with a second injection hole, the first injection hole and the second injection hole corresponding to each other.

7. The battery top cover structure according to claim 1, characterized in that, All sealing components are made of insulating material.

8. The battery top cover structure according to claim 1, characterized in that, The cover plate is made of aluminum or aluminum alloy.

9. The battery top cover structure according to claim 1, characterized in that, The cover plate and the sealing assembly are fixed by ultrasonic welding.

10. A battery, characterized in that, The battery top cover structure includes any one of claims 1-9 above.

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