Cover plate for battery and battery

Abstract

The cover plate for the battery comprises a cover plate body and at least one liquid supplementing structure, a mounting hole is formed in the cover plate body, the liquid supplementing structure is arranged at the mounting hole, the liquid supplementing structure comprises a sealing piece and a sealing piece, the sealing piece is arranged at the mounting hole, and the sealing piece is arranged at the mounting hole. The sealing piece is arranged on one side of the sealing piece, and the sealing piece can open and close the mounting hole. Therefore, the mounting hole is formed in the cover plate body, the liquid supplementing structure is arranged at the mounting hole so as to supplement liquid in the battery, the liquid supplementing operation is simple and easy to implement due to the design of the sealing piece and the sealing piece, the sealing performance of the battery can be ensured in the liquid supplementing process due to the arrangement of the sealing piece, the liquid supplementing operation can be carried out in any environment, and the safety of the battery is improved. Humidity control is not needed, chippings can be prevented from falling into the battery when the sealing piece is damaged through the arrangement of the sealing piece, the safety of the battery is improved, and the service life of the battery can be prolonged through liquid supplementing.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cover plate for a battery and a battery. Background Technology

[0002] In existing technology, a secondary electrolyte injection hole is pre-set on the battery cover. During secondary electrolyte injection, this hole is punctured to add electrolyte. Since the battery's interior is connected to the outside during puncturing the secondary electrolyte injection hole and during the injection process, the battery will absorb moisture. Therefore, the operation needs to be carried out in a low-humidity environment, which places high demands on the environment for the electrolyte injection operation. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the first objective of the present invention is to provide a cover plate for a battery, wherein the cover plate is provided with a liquid replenishment structure to facilitate ensuring the battery's sealing during the liquid replenishment process.

[0004] The second objective of this invention is to provide a battery, including the cover plate for the battery described in the above embodiments.

[0005] A cover plate for a battery according to a first aspect of the present invention includes: a cover plate body and at least one liquid replenishment structure, wherein the cover plate body has a mounting hole; the liquid replenishment structure is disposed at the mounting hole, the liquid replenishment structure includes a sealing member and a sealing member, the sealing member is disposed at the mounting hole, the sealing member is disposed on one side of the sealing member, and the sealing member can open and close the mounting hole.

[0006] According to an embodiment of the present invention, a cover plate for a battery has mounting holes formed on its body and a liquid replenishment structure provided at the mounting holes to replenish the liquid inside the battery. The design of the sealing element and the sealing element makes the liquid replenishment operation simple and easy. The sealing element ensures the battery's airtightness during the liquid replenishment process, allowing the liquid replenishment operation to be carried out in any environment without the need for humidity control. The sealing element also prevents debris from falling into the battery when the sealing element is damaged, thus improving battery safety. Liquid replenishment can also extend the battery's service life.

[0007] In some embodiments, the fluid replenishment structure further includes: a support member, the support member being connected to the cover plate body on one side in the thickness direction of the cover plate body, the support member and the sealing member being spaced apart along the thickness direction of the cover plate body, and the sealing member passing through the support member.

[0008] In some embodiments, the support member has a fluid inlet hole, and the seal member is disposed at the fluid inlet hole.

[0009] In some embodiments, the support is connected to the edge of the mounting hole away from the sealing member, and the end of the seal adjacent to the sealing member is spaced apart from the sealing member.

[0010] In some embodiments, the seal is a rubber component, a silicone component, or a plastic component.

[0011] In some embodiments, a through hole is formed within the seal, the through hole penetrating the seal along the thickness direction of the cover plate body, the through hole being configured to connect and disconnect the mounting hole from the interior of the battery.

[0012] In some embodiments, the sealing element is an aluminum sheet.

[0013] In some embodiments, the surface of the support member away from the cover plate body is an arc surface.

[0014] In some embodiments, the system further includes: a safety valve and a plurality of liquid replenishment structures, wherein the safety valve is disposed on the cover plate body, the plurality of liquid replenishment structures are disposed on the cover plate body, and the plurality of liquid replenishment structures are respectively disposed on both sides of the safety valve.

[0015] A battery according to a second aspect of the present invention includes: a housing and a cover plate, wherein one side of the housing is open, the cover plate is disposed on the open side of the housing, and a sealing element of the cover plate is disposed on the side of the sealing element adjacent to the housing, and the cover plate is a cover plate for a battery according to the first aspect of the present invention described above.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the cover plate according to an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the cover plate according to an embodiment of the present utility model.

[0020] Figure label:

[0021] 100. Cover plate;

[0022] 10. Cover plate body; 11. Mounting holes;

[0023] 20. Liquid replenishment structure; 21. Sealing component; 22. Sealing component; 23. Through hole; 24. Support component; 25. Liquid replenishment hole;

[0024] 30. Safety valve;

[0025] A. Thickness direction. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-2 The present invention describes a cover plate 100 for a battery according to an embodiment of the present invention, comprising: a cover plate body 10 and at least one liquid replenishment structure 20, the cover plate body 10 having a thickness direction A.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, the cover plate body 10 has a mounting hole 11, and the liquid replenishment structure 20 is provided at the mounting hole 11. The liquid replenishment structure 20 includes a sealing member 21 and a sealing member 22. The sealing member 21 is provided at the mounting hole 11, and the sealing member 22 is provided on one side of the sealing member 21. The sealing member 21 can open and close the mounting hole 11.

[0028] Combination Figure 1 and Figure 2 The mounting hole 11 extends through the cover plate body 10 along the thickness direction A. The sealing member 21 of the liquid replenishment structure 20 is located on the surface of the cover plate body 10 away from the battery along the thickness direction A. The sealing member 22 is opposite to the sealing member 21 along the thickness direction A of the cover plate body 10, and is located on the side of the sealing member 21 adjacent to the battery along the thickness direction A of the cover plate body 10. The sealing member 21 is constructed as a destructible structure. When liquid replenishment is required, the mounting hole 11 can be opened by simple physical means (such as puncturing or removing the sealing member 21). After the sealing member 21 is destroyed, the sealing member 22 can be punctured with a needle, allowing the needle to penetrate into the battery, thereby completing the liquid replenishment operation. After liquid replenishment, the mounting hole 11 is resealed by methods such as steel ball injection, laser welding, or UV adhesive application to ensure the battery's airtightness.

[0029] According to the present invention, a cover plate 100 for a battery has a mounting hole 11 formed on the cover plate body 10, and a liquid replenishment structure 20 is provided at the mounting hole 11 to replenish the liquid inside the battery. The design of the sealing member 21 and the sealing member 22 makes the liquid replenishment operation simple and easy. The setting of the sealing member 22 makes it easy to ensure the sealing of the battery during the liquid replenishment process, so that the liquid replenishment operation can be carried out in any environment without humidity control. The setting of the sealing member 22 can also prevent debris from falling into the battery when the sealing member 21 is damaged, thereby improving the safety of the battery. Liquid replenishment can also extend the service life of the battery.

[0030] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the liquid replenishment structure 20 also includes: a support member 24, which is connected to the cover plate body 10 on one side of the cover plate body 10 in the thickness direction A. The support member 24 and the sealing member 21 are spaced apart along the thickness direction A of the cover plate body 10, and the sealing member 22 passes through the support member 24.

[0031] The support member 24 is located on the side of the cover plate body 10 adjacent to the battery along the thickness direction A. The edge of the support member 24 is adapted to connect with the edge of the mounting hole 11 of the cover plate body 10. The middle part of the support member 24 is recessed towards the side where the battery is located in the direction away from the cover plate body 10. The sealing member 22 is fixedly engaged with the support member 24. The support member 24 and the sealing member 21 are spaced apart along the thickness direction A of the cover plate body 10.

[0032] Therefore, the main function of the support member 24 is to provide structural support, ensure the stability of the seal 22 at the mounting hole 11, prevent the seal 22 from shifting during use, and ensure the sealing effect. The support member 24 can improve the structural strength of the liquid replenishment structure 20 and reduce the risk of structural deformation or failure caused by external factors.

[0033] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the support member 24 has a liquid replenishment hole 25, and the sealing member 22 is provided at the liquid replenishment hole 25.

[0034] The replenishment hole 25 is provided through the support member 24 along the thickness direction A of the cover plate 100 structure. The sealing member 22 is embedded in the replenishment hole 25, and the sealing member 22 and the replenishment hole 25 are interference fit. After the sealing member 21 is damaged, the sealing member 22 is provided in the replenishment hole 25 to continue to maintain the sealing of the mounting hole 11, preventing the leakage of liquid inside the battery or the entry of external substances.

[0035] Therefore, the seal 22 is located at the liquid filling hole 25 of the support 24, which makes the fit between the seal 22 and the support 24 more secure, improves the overall reliability of the liquid filling structure 20, and enhances the sealing performance of the battery.

[0036] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the support member 24 is connected to the edge of the mounting hole 11 away from the sealing member 21, and the end of the sealing member 22 adjacent to the sealing member 21 is spaced apart from the sealing member 21.

[0037] The sealing member 21 is disposed on the side surface of the cover plate body 10 away from the battery along the thickness direction A. The support member 24 is opposite to the sealing member 21 along the thickness direction A of the cover plate body 10. The edge of the support member 24 is adapted to connect with the side surface of the cover plate body 10 adjacent to the battery along the thickness direction A. The end of the sealing member 22 adjacent to the cover plate body 10 is disposed at a certain distance from the sealing member 21 along the thickness direction A of the cover plate body 10. That is, the sealing member 22, the support member 24 and the sealing member 21 together define a certain space for accommodating the debris generated when the sealing member 21 is damaged.

[0038] Therefore, the support member 24 and the sealing member 22 are spaced apart from the sealing member 21 along the thickness direction A of the cover plate body 10, which is used to accommodate the debris generated when the sealing member 21 is damaged, prevent the debris from falling into the battery and improve the safety of the battery.

[0039] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the seal 22 is made of rubber, silicone, or plastic.

[0040] Rubber parts offer advantages such as good elasticity, strong sealing performance, wide temperature range, and corrosion resistance. Silicone parts exhibit excellent temperature resistance and good chemical stability. Plastic parts have low production costs and are easy to process. The seal 22 is elastic; during electrolyte replenishment, the tool used for replenishment punctures the seal with a needle, allowing the needle to penetrate the battery and inject the required liquid. The seal 22 fits tightly with the needle to ensure the battery's seal during replenishment. After the replenishment operation is complete and the needle is withdrawn, the seal 22 automatically returns to a sealed state due to its elasticity, ensuring the battery's sealing effect.

[0041] Therefore, the material selection for the seal 22 can be optimized according to the specific usage environment and requirements to ensure optimal performance and reliability. The elastic design of the seal 22 allows it to automatically return to a sealed state during and after the replenishment process, ensuring the battery's sealing effect, enhancing the practicality of the replenishment structure 20, reducing the requirements of the external environment during replenishment, improving the convenience of battery maintenance, and also enhancing the safety and reliability of battery use.

[0042] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, a through hole 23 is formed in the seal 22. The through hole 23 penetrates the seal 22 along the thickness direction A of the cover plate body 10. The through hole 23 is configured to connect and isolate the mounting hole 11 and the inside of the battery.

[0043] According to some embodiments of this utility model, the sealing member 22 has a through hole 23. When not replenishing the battery, the through hole 23 is closed due to the elasticity of the sealing member 22 itself, thus isolating the mounting hole 11 from the battery interior. During battery replenishment, a needle is inserted into the through hole 23 of the sealing member 22 to reach the battery interior and complete the replenishment. After replenishment, the needle is removed, and the sealing member 22 automatically closes the through hole 23 again due to its elasticity, thus isolating the mounting hole 11 from the battery interior once more.

[0044] Therefore, the design of the through hole 23 of the seal 22 allows the needle to pass through smoothly and connect the mounting hole 11 with the inside of the battery, making the liquid replenishment operation more convenient. The seal 22 can connect the mounting hole 11 and the inside of the battery when replenishing liquid, and can effectively isolate the two when not replenishing liquid, further improving the reliability and practicality of the liquid replenishment structure 20.

[0045] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the sealing component 21 is an aluminum sheet.

[0046] Aluminum possesses excellent ductility and malleability, easily processed into various shapes and sizes. This allows for the easy manufacture of sealing components 21 that conform to the dimensions and shape of the mounting hole 11, ensuring a perfect fit between the sealing component 21 and the mounting hole 11. Aluminum forms a dense oxide film in air, providing excellent corrosion resistance. The aluminum sheet exhibits a degree of flexibility but moderate strength, allowing it to be broken through simple physical means (such as puncturing or tearing). Users can easily open the sealing component 21 for liquid replenishment without requiring complex tools or specialized skills. The aluminum sheet adheres tightly to the mounting hole 11, creating a good seal. In non-operating conditions, the sealing component 21 effectively prevents external substances from entering the battery, ensuring its airtightness.

[0047] Therefore, the sealing element 21 is made of aluminum sheet, which is easy to open by simple physical means (such as puncturing or removing). The aluminum sheet sealing element 21 does not produce sharp fragments when broken, further improving operational safety.

[0048] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the surface of the support member 24 away from the cover plate body 10 is an arc surface.

[0049] The support member 24 and the cover plate body 10 are integrally formed. The curved surface design of the support member 24 can improve the stress bearing capacity of the support member 24, avoid stress concentration, improve the reliability and stability of the support member 24, and thus improve the overall reliability of the liquid replenishment structure 20.

[0050] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, it also includes: a safety valve 30 and multiple liquid replenishment structures 20. The safety valve 30 is disposed on the cover plate body 10, and the multiple liquid replenishment structures 20 are disposed on the cover plate body 10. The multiple liquid replenishment structures 20 are respectively disposed on both sides of the safety valve 30.

[0051] A safety valve 30 is located on the cover plate body 10. When the internal pressure of the battery is too high, the safety valve 30 will automatically open to release the excess pressure, preventing the battery from exploding or being damaged due to excessive internal pressure, thus ensuring battery safety. Multiple liquid replenishment structures 20 are located on the cover plate body 10, respectively on both sides of the safety valve 30. These multiple liquid replenishment structures 20 ensure liquid replenishment operations at different locations, improving the uniformity and efficiency of liquid replenishment. They also provide a backup solution if one liquid replenishment structure 20 fails, enhancing overall reliability and enabling multiple liquid replenishment operations. In some embodiments, the cover plate body 10 may have multiple mounting holes 11. At least one mounting hole 11 may only have a sealing element 21 on one side, without a sealing element 22 or a support element 24, and at least one mounting hole 11 may have a complete liquid replenishment structure 20; alternatively, multiple mounting holes 11 may each have a complete liquid replenishment structure 20.

[0052] Therefore, the safety valve 30 and the multiple liquid replenishment structures 20 can effectively improve battery safety, realize simple, safe and reliable replenishment of liquid inside the battery, and the multiple liquid replenishment structures 20 facilitate multiple liquid replenishment operations, effectively extending the battery's service life.

[0053] A battery according to a second aspect embodiment of the present invention includes: a housing and a cover plate 100, one side of the housing is open, the cover plate 100 is disposed on the open side of the housing, and a sealing member 22 of the cover plate 100 is disposed on the side of the sealing member 21 adjacent to the housing. The cover plate 100 is the cover plate 100 for a battery according to the first aspect embodiment of the present invention described above.

[0054] The casing, serving as the outer shell of the battery, protects the internal components and prevents external environmental influences from affecting the battery. One side of the casing is open, facilitating the installation and maintenance of the internal components. A cover plate 100 closes the open side of the casing, providing a sealed space at the top of the battery and containing a liquid replenishment structure 20.

[0055] According to the battery of the present utility model embodiment, by applying the cover plate 100 for the battery in the above embodiment, the cover plate 100 is provided with a liquid replenishment structure 20, which realizes that the liquid replenishment operation of the battery can be carried out in any environment without humidity control, increasing the flexibility and convenience of operation. The battery life can be extended by replenishing liquid. The introduction of the safety valve 30 and multiple liquid replenishment structures 20 further improves the safety and reliability of the battery.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cover plate for a battery, characterized in that, include: A cover plate body having mounting holes; At least one fluid replenishment structure is provided at the mounting hole. The fluid replenishment structure includes a sealing member, a sealing member, and a support member. The sealing member is provided at the mounting hole, and the sealing member is provided on one side of the sealing member. The sealing member can be opened and closed. The support member is connected to the cover plate body on one side in the thickness direction of the cover plate body. The support member and the sealing member are spaced apart along the thickness direction of the cover plate body. The sealing member passes through the support member and has a through hole formed inside. The through hole is configured to connect and disconnect the mounting hole from the inside of the battery.

2. The cover plate for a battery according to claim 1, characterized in that, The support member has a liquid filling hole, and the sealing member is located at the liquid filling hole.

3. The cover plate for a battery according to claim 1, characterized in that, The support member is connected to the edge of the mounting hole away from the sealing member, and the end of the sealing member adjacent to the sealing member is spaced apart from the sealing member.

4. The cover plate for a battery according to claim 1, characterized in that, The sealing element is made of rubber, silicone, or plastic.

5. The cover plate for a battery according to claim 1, characterized in that, The sealing element is an aluminum sheet.

6. The cover plate for a battery according to claim 1, characterized in that, The surface of the support member away from the cover plate body is curved.

7. The cover plate for a battery according to any one of claims 1-6, characterized in that, Also includes: Safety valve, wherein the safety valve is disposed on the cover plate body; Multiple liquid replenishment structures are provided on the cover plate body and on both sides of the safety valve.

8. A battery, characterized in that, include: A housing, one side of which is open; A cover plate, the cover plate being disposed on the open side of the housing, the cover plate having a sealing element disposed on the side of the sealing element adjacent to the housing, the cover plate being a cover plate for a battery according to any one of claims 1-7.

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