Cover plate, battery and battery pack

Abstract

The application relates to the technical field of battery manufacturing, and provides a cover plate, a battery and a battery pack. The cover plate comprises a cover plate body, a liquid supplementing hole arranged on the cover plate body, and a plugging piece for plugging the liquid supplementing hole; the cover plate body is provided with a mounting groove corresponding to the liquid supplementing hole, the mounting groove is arranged along the circumferential direction of the liquid supplementing hole, and the plugging piece is detachably arranged in the mounting groove. The cover plate can facilitate supplement of electrolyte, and is helpful for improving the use quality of the battery.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a cover plate, a battery, and a battery pack. Background Technology

[0002] In the field of battery manufacturing, the battery cell, as the core component of the battery, directly affects the overall quality of the battery due to its performance and lifespan. After the battery cell is assembled into the battery, electrolyte is added to the battery to wet the cell. For this purpose, there is an injection hole on the battery cover. After the electrolyte is added, the injection hole is sealed.

[0003] However, during battery cycling, the electrolyte in the cell will be continuously consumed. As the electrolyte is continuously consumed, the capacity of the cell will gradually decrease, affecting the battery's lifespan. If additional electrolyte is added during the initial electrolyte filling to cope with the consumption of electrolyte during use, it will have an adverse effect on the cell's performance and will not be conducive to improving the battery's quality of use. Utility Model Content

[0004] In view of this, this application aims to propose a cover plate to improve the quality of battery use.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] A cover plate includes a liquid replenishment hole provided on the cover plate body, and a sealing member for sealing the liquid replenishment hole;

[0007] The cover plate body is provided with a mounting groove corresponding to the liquid replenishment hole. The mounting groove is arranged around the circumference of the liquid replenishment hole, and the sealing member is detachably disposed in the mounting groove.

[0008] Furthermore, the cover plate body is provided with a fixing part, and the mounting groove is provided on the fixing part; the fixing part is connected to the liquid replenishment hole through a connecting part, the connecting part is a ring arranged around the circumference of the liquid replenishment hole, and the middle part of the connecting part arches inward along the radial direction of the liquid replenishment hole.

[0009] Furthermore, at least a portion of the sealing member extends downward along the height direction of the cover plate body and passes through the connecting portion and the liquid replenishment hole; the sidewall of the sealing member abuts against the inner wall of the connecting portion, and the sealing member and the connecting portion are sealed together.

[0010] Furthermore, the cover plate body is provided with a fixing part, and the mounting groove is provided on the fixing part; the fixing part includes a first plate extending inward along the circumference of the liquid replenishment hole, a second plate extending downward along the axial direction of the liquid replenishment hole, and a third plate extending inward along the circumference of the second plate; the first plate, the second plate and the third plate form the mounting groove.

[0011] Furthermore, the cover plate body is provided with a fixing part, and the mounting groove is provided on the fixing part; the fixing part includes a first plate extending inward along the circumference of the liquid replenishment hole, a second plate extending upward along the axial direction of the liquid replenishment hole towards the cover plate, and a third plate extending inward along the circumference of the second plate; the first plate, the second plate and the third plate form the mounting groove.

[0012] Furthermore, the sealing element includes a skeleton and a sealing layer disposed on the skeleton; when the sealing element seals the fluid replenishment hole, the skeleton is located in the mounting groove, and the sealing layer is located between the skeleton and the mounting groove.

[0013] Furthermore, at least the portion of the skeleton located within the mounting groove is provided with the sealing layer.

[0014] Furthermore, the skeleton is made of a metal material; and / or, the sealing layer is made of an elastic material.

[0015] Compared with related technologies, this application has the following advantages:

[0016] (1) The cover plate described in this application, through the setting of the liquid filling hole, can add electrolyte into the cell after the battery leaves the factory for use, replenish the electrolyte consumption, and can discharge the gas generated by the cell, which can reduce the amount of liquid injected inside the battery when it leaves the factory, improve the initial performance of the cell, and help extend the battery life. Through the setting of the sealing component, the liquid filling hole can be blocked during the use of the battery, and the liquid filling hole can be repeatedly opened or closed, ensuring the normal use of the battery, and helping to improve the quality of battery use.

[0017] (2) The setting of the fixing part facilitates the arrangement of the installation groove, and the setting of the connecting part can further improve the sealing effect of the sealing part on the liquid replenishment hole, enhance the sealing performance of the sealing part on the liquid replenishment hole, and the setting of the connecting part, in conjunction with the fixing part, facilitates the formation of the installation groove, which helps the assembly of the sealing part.

[0018] (3) By extending at least part of the plugging component downward through the connection and the liquid filling hole, the sealing fit between the plugging component and the connection is further enhanced, the overall sealing performance is improved, and the stability of the plugging component is enhanced, thus improving the sealing effect of the plugging component during battery use.

[0019] (4) By making the fixing plate consist of a first plate, a second plate and a third plate, it is easy to process and manufacture, and the mounting groove has a stable shape, which is conducive to improving the fixing effect of the mounting groove on the sealing component and also helps the assembly of the sealing component.

[0020] (5) By making the fixing plate consist of a first plate, a second plate and a third plate, and the second plate extends upward along the axial direction of the liquid replenishment hole, it is conducive to the formation of the installation groove, which can meet the usage requirements and facilitate the installation and disassembly of the sealing component above the cover plate, thus improving the convenience of the liquid replenishment operation.

[0021] (6) By setting the skeleton, the sealing component can be ensured to have sufficient strength and shape stability, thereby enhancing the assembly stability of the sealing component in the mounting groove. The sealing layer enhances the sealing between the sealing component and the mounting groove, which is conducive to design implementation.

[0022] (7) By providing a sealing layer to the part of the skeleton located in the mounting groove, the material used for the sealing layer is reduced while ensuring the sealing effect, thus reducing costs and facilitating design implementation.

[0023] (8) By making the skeleton out of metal, the structural stability of the sealing component during disassembly and assembly is ensured, which is conducive to ensuring the service life of the sealing component. At the same time, by making the sealing layer out of elastic material, the sealing effect of the sealing component is easily achieved, and the disassembly and assembly of the sealing component is also convenient.

[0024] This application also proposes a battery having a cover plate as described above.

[0025] This application also proposes a battery pack, wherein the battery pack contains the battery as described above.

[0026] The battery and battery pack described in this application have the same beneficial effects as the cover plate described above compared to the prior art, so they will not be described again here. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 This is a schematic diagram of one embodiment of the cover plate described in this application.

[0029] Figure 2 This is a cross-sectional view of one embodiment of the cover plate described in this application.

[0030] Figure 3 for Figure 1 Enlarged view of point A;

[0031] Figure 4 for Figure 2 Enlarged view of point B;

[0032] Figure 5 This is a partially enlarged view of another embodiment of the cover plate described in this application.

[0033] Figure 6 This is a partial cross-sectional view of another embodiment of the cover plate described in this application.

[0034] Figure 7 This is a partially enlarged view of another embodiment of the cover plate described in this application.

[0035] Figure 8 This is a partial cross-sectional view of another embodiment of the cover plate described in this application.

[0036] Figure 9 This is a partial enlarged view of another embodiment of the cover plate described in this application.

[0037] Figure 10 This is a partial cross-sectional view of yet another embodiment of the cover plate described in this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Cover plate body; 2. Liquid filling hole; 3. Sealing component; 4. Mounting groove; 5. Liquid injection hole; 6. Reinforcing rib;

[0040] 7. Fixing part; 701. First plate; 702. Second plate; 703. Third plate;

[0041] 8. Connecting parts. Detailed Implementation

[0042] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0044] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not 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 on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0046] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0048] An embodiment of the first aspect of this application provides a cover plate for sealing the end of a battery, mainly for confining the battery cell within the battery casing. Furthermore, the cover plate in this embodiment, with its innovative structural design, facilitates the replenishment of electrolyte into the battery during use, thereby improving the battery's performance.

[0049] In related technologies, during battery manufacturing, the battery cell, as the core component of the battery, directly affects the overall quality of the battery due to its performance and lifespan. After the battery cell is assembled into the battery, electrolyte is added to the battery to wet the cell. For this purpose, an injection hole is provided on the battery cover. After the electrolyte is added, the injection hole is sealed.

[0050] However, during battery cycling, the electrolyte in the cell will be continuously consumed. As the electrolyte is continuously consumed, the capacity of the cell will gradually decrease, affecting the battery's lifespan. If additional electrolyte is added during the initial electrolyte filling to cope with the consumption of electrolyte during use, it will have an adverse effect on the cell's performance and will not be conducive to improving the battery's quality of use.

[0051] In view of this, in order to overcome the shortcomings of the related technology, the cover plate in this embodiment combines... Figures 1 to 4 As shown, the overall design includes a cover plate body 1.

[0052] The cover plate body 1 is provided with a liquid replenishment hole 2 and a sealing component 3 for sealing the liquid replenishment hole 2. The cover plate body 1 is provided with a corresponding mounting groove 4 for the liquid replenishment hole 2. The mounting groove 4 is arranged around the liquid replenishment hole 2. The sealing component 3 is detachably installed in the mounting groove 4.

[0053] Therefore, by setting the electrolyte filling hole 2, electrolyte can be added into the cell after the battery leaves the factory to replenish the electrolyte consumption and to discharge the gas generated by the cell. This reduces the amount of electrolyte injected into the battery at the factory, improves the initial performance of the cell, and helps to extend the battery's lifespan. By setting the sealing component 3, the electrolyte filling hole 2 can be sealed during battery use, and the electrolyte filling hole 2 can be repeatedly opened or closed, ensuring the normal use of the battery and helping to improve the battery's quality of use.

[0054] Based on the above overall introduction, specifically regarding the cover plate in this embodiment, combined with... Figures 1 to 4 As shown, it generally includes a cover plate body 1.

[0055] The cover plate body 1 is typically provided with an injection hole 5, which penetrates the cover plate body 1 and can be closed after injection. The arrangement and closing method of the injection hole 5 on the cover plate body 1 can be referenced from the arrangement and closing method of the injection hole 5 on existing cover plates, and will not be described in detail here.

[0056] In practical implementation, the above-mentioned cover plate body 1 usually has a raised reinforcing rib 6. In this embodiment, the liquid replenishment hole 2 can be provided on the reinforcing rib 6 of the cover plate body 1, so as to reduce the impact on the battery cell when the sealing component 3 is opened and closed. The setting form of the reinforcing rib 6 of the above-mentioned cover plate body 1 can refer to the setting form of the reinforcing rib 6 of the existing cover plate, and will not be described in detail here.

[0057] Furthermore, the material and shape of the main body 1 of the cover plate can also be based on the material (such as aluminum alloy) and shape (such as round) of existing battery cover plates, and will not be elaborated here.

[0058] It is worth mentioning that the shape of the above-mentioned liquid replenishment hole 2 can be, for example, circular, to facilitate manufacturing. Of course, in addition to being circular, other existing hole shapes (such as oblong shapes) can also achieve the effect of setting the liquid replenishment hole 2.

[0059] Continue to combine Figures 1 to 4 As shown, in some exemplary embodiments, this embodiment may, for example, provide a fixing part 7 on the cover plate body 1, and a mounting groove 4 is provided on the fixing part 7.

[0060] The fixing part 7 is connected to the replenishment hole 2 through the connecting part 8. The connecting part 8 is arranged in a circle along the circumference of the replenishment hole 2, and the middle part of the connecting part 8 arches inward along the radial direction of the replenishment hole 2.

[0061] It is understandable that the setting of the fixing part 7 facilitates the arrangement of the installation groove 4, and the setting of the connecting part 8 can further improve the sealing effect of the sealing part 3 on the liquid replenishment hole 2, enhance the sealing performance of the sealing part 3 on the liquid replenishment hole 2, and the setting of the connecting part 8, in cooperation with the fixing part 7, facilitates the formation of the installation groove 4, which helps the assembly of the sealing part 3.

[0062] In specific implementation, the connecting part 8 and the fixing part 7 can be integrally formed with the cover plate body 1. The connecting part 8 is a plate-shaped structure that extends upward from the cover plate body 1 along the circumference of the liquid replenishment hole 2. The fixing part 7 extends upward from the top of the connecting part 8 and is provided with a flange. When the sealing part 3 blocks the liquid replenishment hole 2, the flange of the fixing part 7 presses against the sealing part 3. When the sealing part 3 needs to be removed, the sealing part 3 can be removed by simply folding the flange of the fixing part 7. After the liquid replenishment is completed, the sealing part 3 is reinstalled, and the flange is bent again to press against the sealing part 3 to complete the assembly of the sealing part 3.

[0063] Continue to combine Figure 5 and Figure 6 As shown, in some exemplary embodiments, the cover body 1 is provided with a fixing part 7, and the fixing part 7 is connected to the liquid replenishment hole 2 through the connecting part 8. In this embodiment, at least a portion of the sealing member 3 can extend downward along the height direction of the cover body 1 and pass through the connecting part 8 and the liquid replenishment hole 2.

[0064] The side wall of the sealing member 3 abuts against the inner wall of the connecting part 8, and the sealing member 3 and the connecting part 8 are sealed together.

[0065] Understandably, by extending at least a portion of the sealing element 3 downwards through the connecting portion 8 and the replenishment hole 2, the sealing fit between the sealing element 3 and the connecting portion 8 is further enhanced, improving the overall sealing performance and helping to strengthen the stability of the sealing element 3, thus enhancing the sealing effect of the sealing element 3 during battery use.

[0066] In specific implementation, the sealing component 3 is T-shaped along the cross-sectional shape of the cover plate body 1, and the bottom end of the sealing component 3 extends out of the liquid replenishment hole 2. At this time, the part of the middle part of the connecting part 8 that is supplied inward abuts against the sealing component 3.

[0067] Furthermore, the arrangement of the connecting part 8 and the fixing part 7 can still refer to the arrangement of the fixing part 7 and the connecting part 8 in the above embodiment. When the sealing part 3 blocks the liquid replenishment hole 2, the flange of the fixing part 7 presses against the sealing part 3. When it is necessary to remove the sealing part 3, the sealing part 3 can be removed simply by folding the flange of the fixing part 7. After the liquid replenishment is completed, the sealing part 3 is reinstalled, and the flange is bent again to press against the sealing part 3 to complete the assembly of the sealing part 3.

[0068] Continue to combine Figure 7 and Figure 8 As shown, in some exemplary embodiments, this embodiment may, for example, provide a fixing part 7 on the cover plate body 1, and a mounting groove 4 is provided on the fixing part 7.

[0069] The fixing part 7 includes a first plate 701 extending inward along the circumference of the liquid replenishment hole 2, a second plate 702 extending downward along the axial direction of the liquid replenishment hole 2 towards the cover plate, and a third plate 703 extending inward along the circumference of the second plate 702. The first plate 701, the second plate 702 and the third plate 703 form an installation groove 4.

[0070] It is understandable that by making the fixing plate consist of the first plate 701, the second plate 702 and the third plate 703, it is easy to process and manufacture, and the mounting groove 4 has a stable shape, which is conducive to improving the fixing effect of the mounting groove 4 on the sealing member 3, and also helps the assembly of the sealing member 3.

[0071] In practical implementation, when the sealing element 3 is placed on the replenishment hole 2, part of the sealing element 3 is located above the cover plate body 1. At this time, the sealing element 3 can be directly pulled out from the mounting groove 4 to release the sealing element 3 from the replenishment hole 2. When it is necessary to re-seal the replenishment hole 2, the sealing element 3 can be reinserted into the mounting groove 4. At this time, the third plate 703 can support the sealing element 3 when forming the mounting groove 4, and the bottom surface of the sealing element 3 presses against the top surface of the third plate 703.

[0072] Continue to combine Figure 9 and Figure 10 As shown, in some exemplary embodiments, this embodiment may, for example, provide a fixing part 7 on the cover plate body 1, and a mounting groove 4 is provided on the fixing part 7.

[0073] The fixing part 7 includes a first plate 701 extending inward along the circumference of the liquid replenishment hole 2, a second plate 702 extending upward along the axial direction of the liquid replenishment hole 2 towards the top of the cover plate, and a third plate 703 extending inward along the circumference of the second plate 702. The first plate 701, the second plate 702 and the third plate 703 form an mounting groove 4.

[0074] It is understandable that by making the fixing plate consist of a first plate body 701, a second plate body 702 and a third plate body 703, and the second plate body 702 extending upward along the axial direction of the liquid replenishment hole 2, it is conducive to the formation of the mounting groove 4, which can meet the usage requirements and facilitate the installation and removal of the sealing component 3 above the cover plate, thereby improving the convenience of the liquid replenishment operation.

[0075] In practice, when the above-mentioned sealing component 3 is sealed on the liquid replenishment hole 2, the third plate 703 is located above the cover plate body 1. At this time, when the above-mentioned sealing component 3 is released from the liquid replenishment hole 2, the third plate 703 is folded over so that the third plate 703 releases the restriction on the sealing component 3, and the sealing component 3 can be removed. When resealing the liquid replenishment hole 2, the bottom surface of the sealing component 3 is pressed against the first plate 701, and the third plate 703 is folded over again and pressed against the sealing component 3, and the sealing of the sealing component 3 can be completed.

[0076] In some exemplary embodiments, this embodiment may, for example, make the sealing member 3 include a skeleton and a sealing layer disposed on the skeleton.

[0077] When the sealing component 3 is sealed in the liquid replenishment hole 2, the skeleton is located in the mounting groove 4, and the sealing layer is located between the skeleton and the mounting groove 4.

[0078] Understandably, the skeleton design ensures that the sealing component 3 has sufficient strength and shape stability, thereby enhancing the assembly stability of the sealing component 3 within the mounting groove 4. The sealing layer design also enhances the sealing performance between the sealing component 3 and the mounting groove 4, which is beneficial for design implementation.

[0079] In practical implementation, the shape of the above skeleton can be set according to the shape of the liquid replenishment hole 2. Of course, the shape of the above skeleton can also be set according to the shape of the sealing component 3. At least it is necessary to ensure that the part of the sealing component 3 located in the mounting groove 4 has sufficient support structure.

[0080] Continue to combine Figures 1 to 4 As shown, in some exemplary embodiments, the sealing member 3 includes a skeleton and a sealing layer. In this embodiment, for example, the portion of the skeleton located within the mounting groove 4 may be provided with a sealing layer.

[0081] Understandably, by providing a sealing layer to the portion of the frame located within the mounting groove 4, the material usage of the sealing layer is reduced while ensuring the sealing effect, thus lowering costs and facilitating design and implementation.

[0082] In practice, the sealing layer can completely cover the skeleton, or it can be set only in the part of the skeleton located in the mounting groove 4. When the sealing component 3 seals the liquid replenishment hole 2, the sealing layer abuts against the inner wall of the mounting groove 4.

[0083] In some exemplary embodiments, taking the sealing element 3 as an example, which includes a skeleton and a sealing layer, this embodiment may, for example, make the skeleton made of a metal material and the sealing layer made of an elastic material.

[0084] Understandably, by making the frame out of metal, the structural stability of the sealing component 3 is ensured during the assembly and disassembly process, which helps to guarantee the service life of the sealing component 3. At the same time, by making the sealing layer out of elastic material, the sealing effect of the sealing component 3 is easily achieved, and the assembly and disassembly of the sealing component 3 is also convenient.

[0085] In practical implementation, the above-mentioned skeleton can be made of aluminum alloy, and the above-mentioned sealing layer can be made of rubber material. Of course, in addition to aluminum alloy and rubber material, the above-mentioned skeleton and sealing layer material can also be made of other materials in related technologies. It is only necessary to ensure that the material used to make the skeleton has sufficient structural strength and the material used to make the sealing layer has sufficient elasticity to meet the design and implementation requirements.

[0086] It is worth noting that, regarding the cover plate of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still made of... Figures 1 to 6 As shown, it generally includes a cover plate body 1, a liquid replenishment hole 2 provided on the cover plate body 1, and a sealing component 3 for sealing the liquid replenishment hole 2.

[0087] The cover plate body 1 is provided with a fixing part 7, which is connected to the replenishment hole 2 through a connecting part 8. The fixing part 7 has a mounting groove 4, which is arranged around the circumference of the replenishment hole 2. The connecting part 8 is arranged in a circle around the circumference of the replenishment hole 2, and the middle part of the connecting part 8 extends radially inward along the replenishment hole 2. The sealing element 3 is detachably provided in the mounting groove 4.

[0088] The sealing component 3 extends downward along the height direction of the cover plate body 1 and passes through the connecting part 8 and the liquid replenishment hole 2. The side wall of the sealing component 3 abuts against the inner wall of the connecting part 8, and the sealing component 3 and the connecting part 8 are sealed together.

[0089] The sealing component 3 includes a skeleton and a sealing layer. The skeleton is set according to the shape of the sealing component 3, and the sealing layer covers the skeleton. The skeleton is made of aluminum alloy, and the sealing layer is made of rubber.

[0090] In the preferred embodiment of the cover plate above, the specific settings and arrangements of the cover plate body 1, the liquid replenishment hole 2, the sealing component 3, etc. can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the cover plate body 1, the liquid replenishment hole 2, and the sealing component 3, etc., can also be referred to the descriptions in the above exemplary embodiments.

[0091] The cover plate of this embodiment adopts the above design. With the setting of the electrolyte filling hole 2, electrolyte can be added into the cell after the battery leaves the factory to replenish the electrolyte consumption and to discharge the gas generated by the cell. This can reduce the amount of electrolyte injected into the battery at the factory, improve the initial performance of the cell, and help extend the battery life. With the setting of the sealing component 3, the electrolyte filling hole 2 can be sealed during the use of the battery, and the electrolyte filling hole 2 can be repeatedly opened or closed to ensure the normal use of the battery and improve the quality of battery use.

[0092] An embodiment of the second aspect of this application provides a battery having a cover plate as described above.

[0093] In the battery of this embodiment, the upper cover plate serves as a component for sealing the battery and is generally fixedly connected to the battery casing. The connection method between the upper cover plate and the battery casing can refer to the connection method between the cover plate and the casing in existing batteries (such as welding), and will not be described in detail here.

[0094] In this embodiment, the battery, through the cover plate as described above, allows electrolyte to be added to the cell after the battery is manufactured and used, replenishing the electrolyte consumption and venting the gas generated by the cell, thereby improving the initial performance of the battery and extending its service life. Furthermore, the sealing component 3 can repeatedly seal and open the electrolyte filling hole 2, ensuring the normal use requirements of the battery and improving the quality of battery use.

[0095] An embodiment of the third aspect of this application provides a battery pack in which the battery as described above is provided.

[0096] In the battery pack of this embodiment, the batteries serve as energy storage units. Multiple batteries are typically provided and connected in series or parallel to form battery modules, which are then connected to the battery management system within the battery pack. The arrangement of the batteries and their connection to the battery management system can be derived from existing battery pack arrangements and connections, and will not be elaborated further here.

[0097] The battery pack of this embodiment, through the battery configuration described above, allows for the addition of electrolyte to the cells after the battery is manufactured and used, replenishing the electrolyte consumption and expelling gas generated by the cells, thereby improving the initial performance of the battery and extending its service life. Furthermore, the sealing component 3 can repeatedly seal and open the electrolyte filling hole 2, ensuring the normal use requirements of the battery and improving the quality of the battery pack.

[0098] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A cover plate, characterized in that: It includes a liquid replenishment hole provided on the main body of the cover plate, and a sealing component for sealing the liquid replenishment hole; The cover plate body is provided with a mounting groove corresponding to the liquid replenishment hole. The mounting groove is arranged around the circumference of the liquid replenishment hole, and the sealing member is detachably disposed in the mounting groove.

2. The cover plate according to claim 1, characterized in that: The cover plate body is provided with a fixing part, and the mounting groove is provided on the fixing part; The fixing part is connected to the replenishment hole through the connecting part, which is a ring arranged around the circumference of the replenishment hole, and the middle part of the connecting part arches inward along the radial direction of the replenishment hole.

3. The cover plate according to claim 2, characterized in that: At least a portion of the sealing element extends downward along the height direction of the cover plate body and passes through the connecting portion and the liquid replenishment hole; The sidewall of the sealing member abuts against the inner wall of the connecting part, and the sealing member and the connecting part are sealed together.

4. The cover plate according to claim 1, characterized in that: The cover plate body is provided with a fixing part, and the mounting groove is provided on the fixing part; The fixing part includes a first plate extending inward along the circumference of the liquid replenishment hole, a second plate extending downward along the axial direction of the liquid replenishment hole towards the cover plate, and a third plate extending inward along the circumference of the second plate. The first plate, the second plate, and the third plate form the mounting groove.

5. The cover plate according to claim 1, characterized in that: The cover plate body is provided with a fixing part, and the mounting groove is provided on the fixing part; The fixing part includes a first plate extending inward along the circumference of the liquid replenishment hole, a second plate extending upward along the axial direction of the liquid replenishment hole towards the cover plate, and a third plate extending inward along the circumference of the second plate. The first plate, the second plate, and the third plate form the mounting groove.

6. The cover plate according to any one of claims 1-5, characterized in that: The sealing component includes a skeleton and a sealing layer disposed on the skeleton; When the sealing element is sealed in the liquid replenishment hole, the skeleton is located in the mounting groove, and the sealing layer is located between the skeleton and the mounting groove.

7. The cover plate according to claim 6, characterized in that: At least the portion of the skeleton located within the mounting groove is provided with the sealing layer.

8. The cover plate according to claim 6, characterized in that: The skeleton is made of metal; and / or, The sealing layer is made of an elastic material.

9. A battery, characterized in that: The battery is provided with a cover plate as described in any one of claims 1 to 8.

10. A battery pack, characterized in that: The battery pack includes the battery as described in claim 9.

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