Battery top cover assembly and battery
By installing support components in the battery top cover assembly to fill the gap between the terminal post and the retaining wall, the problem of positional displacement during battery tab welding is solved, thereby improving welding quality and the stability and safety of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SVOLT ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-21
AI Technical Summary
During the welding process, the battery tabs are prone to positional displacement due to uneven force, resulting in welding position deviation and damage, which in turn leads to process defects such as incomplete welding and insufficient penetration.
Design a battery top cover assembly, including a top cover body, a first insulating member, a terminal post, and a support member. The support surface of the support member abuts against the end of the terminal post and the end face of the insulating member's retaining wall, respectively, filling the gap between the end face of the terminal post and the retaining wall, providing stable support to constrain the position of the terminal tab, prevent displacement, and avoid the retaining wall from squeezing and damaging the terminal tab.
Improving welding quality and connection strength enhances battery life and safety performance. Uniform support prevents electrode shifting, avoids damage to the electrode by the retaining wall, and improves the overall stability and safety of the battery.
Smart Images
Figure CN224537165U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a battery top cover assembly and a battery. Background Technology
[0002] In recent years, lithium-ion batteries have been widely used in new energy vehicles, energy storage systems, and other fields, leading to increasingly stringent requirements for battery performance and safety. In traditional designs, the battery top cover is typically fixed to the casing using a retaining wall.
[0003] During the welding process between the terminal post and the battery tab, the battery tab is prone to positional displacement due to uneven stress caused by the support of the retaining wall. This not only leads to welding position deviation but also damages the battery tab, resulting in process defects such as incomplete welding and insufficient penetration. Utility Model Content
[0004] This utility model provides a battery top cover assembly and a battery to solve the problem that the battery tabs are prone to positional displacement due to uneven force, which not only leads to welding position deviation, but also easily damages the battery tabs, and thus causes process defects such as poor welding and insufficient penetration.
[0005] In a first aspect, this utility model provides a battery top cover assembly, comprising: The top cover body has pole hole; A first insulating member has a first side connected to the top cover body and a second side having a baffle wall. A first through hole is formed on the first insulating member that is opposite to the pole hole. The electrode post is inserted into the electrode post hole and the first through hole, and the end of the electrode post is exposed in the first through hole; A first support member is disposed between the end of the pole post and the retaining wall. The first support member has a support surface, one end of which extends to the end face of the retaining wall, and the other end of which extends to the end face of the pole post.
[0006] According to the present invention, a battery top cover assembly is provided, wherein two baffles are formed on the second side of the first insulating member, the two baffles are spaced apart along the width direction of the first insulating member, the opening of the first through hole is located between the two baffles, and the first support member is disposed between the end of the pole post and one of the baffles.
[0007] According to the present invention, a battery top cover assembly is provided, wherein the two baffles are a first baffle and a second baffle, the height of the first baffle is less than the height of the second baffle, and the first support is disposed between the end of the pole post and the first baffle.
[0008] According to the present invention, a battery top cover assembly further includes: A second support member is disposed between the end of the pole post and the second retaining wall, and a clamping space suitable for restricting the end of the pole post is formed between the second support member and the first support member.
[0009] According to the present invention, a battery top cover assembly is provided, wherein the first support member and / or the second support member are provided with a plurality of components.
[0010] According to the present invention, a battery top cover assembly further includes: The second insulating member is connected to the side of the top cover body away from the first insulating member. A mounting groove is formed on the side away from the top cover body. A second through hole for the pole to pass through is formed in the mounting groove at the position corresponding to the pole hole. A riveting block is disposed in the mounting groove, and a third through hole is formed at the position corresponding to the pole hole for the pole to pass through.
[0011] According to the present invention, a battery top cover assembly further includes: A sealing ring is fitted onto the pole post, and the sealing ring forms a seal with at least one of the sidewall of the first through hole, the sidewall of the pole post hole, and the sidewall of the second through hole.
[0012] According to the present invention, a battery top cover assembly is provided, wherein a liquid injection hole is formed on the top cover body.
[0013] According to the present invention, a battery top cover assembly is provided, wherein a protective cover is connected to the first insulating member, the protective cover and the first insulating member form a cavity communicating with the liquid injection hole, and a communicating hole is provided on the end face of the protective cover opposite to the liquid injection hole, which is offset from the liquid injection hole.
[0014] Secondly, this utility model also provides a battery, comprising: Battery casing; The aforementioned battery top cover assembly is fixed to the opening of the battery casing; A battery electrode assembly, located inside the battery housing, is provided with battery tabs, which extend along the support surface to connect with the end of the terminal post.
[0015] The battery top cover assembly and battery provided by this utility model, by setting a first support member with a specific support surface, allows its two ends to abut against the end of the terminal post and the end face of the insulating retainer wall, respectively, effectively filling the gap between the end face of the terminal post and the retainer wall, and providing stable support for welding the battery tabs. This first support member, on the one hand, can constrain the positional displacement of the battery tabs during the welding process, ensuring uniform contact area in the welding region, improving welding yield and connection strength; on the other hand, by covering the edge of the retainer wall end face with the support surface, it prevents the retainer wall from squeezing and damaging the battery tabs during bending. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a three-dimensional structural diagram of the front of the battery top cover assembly provided by this utility model.
[0018] Figure 2 This is a three-dimensional structural diagram of the back of the battery top cover assembly provided by this utility model.
[0019] Figure 3 This is a front view of the battery top cover assembly provided by this utility model.
[0020] Figure 4 yes Figure 3 A schematic diagram of section AA.
[0021] Figure 5 This is a partial schematic diagram of the battery provided by this utility model.
[0022] Figure 6 This is a schematic diagram of the battery mounting battery top cover assembly provided by this utility model.
[0023] Figure 7 This is a three-dimensional structural diagram of the battery provided by this utility model.
[0024] Figure label: 1. Battery top cover assembly; 11. Top cover body; 111. Injection hole; 112. Terminal hole; 12. First insulating component; 121. First through hole; 122. First baffle; 123. Second baffle; 124. Protective cover; 1241. Connecting hole; 13. Terminal; 14. First support component; 15. Second support component; 16. Second insulating component; 161. Second through hole; 17. Riveting block; 171. Third through hole; 18. Sealing ring; 2. Battery casing; 3. Battery electrode assembly; 31. Battery tabs. Detailed Implementation
[0025] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0026] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.
[0027] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0029] The following is combined Figures 1-7 This invention describes the battery top cover assembly 1 and the battery provided by this utility model.
[0030] This application provides a battery top cover assembly 1. For example... Figures 1 to 4 As shown, the battery top cover assembly 1 includes: a top cover body 11, a first insulating member 12, a terminal post 13, and a first support member 14. The top cover body 11 has a terminal post hole 112; a first side of the first insulating member 12 is connected to the top cover body 11, and a baffle is formed on the second side; a first through hole 121 is formed on the first insulating member 12 opposite to the terminal post hole 112; the terminal post 13 passes through the terminal post hole 112 and the first through hole 121, and the end of the terminal post 13 is exposed in the first through hole 121; the first support member 14 is disposed between the end of the terminal post 13 and the baffle, and the first support member 14 has a support surface, one end of which extends to the end face of the baffle, and the other end of which extends to the end face of the terminal post 13.
[0031] In this embodiment, the first side of the first insulating member 12 is tightly and firmly connected to the top cover body 11, ensuring good electrical insulation between the top cover body 11 and the internal components of the battery. A baffle is provided on the second side of the first insulating member 12, such as... Figure 5 As shown, the retaining wall is mainly used for the installation of the entire battery top cover assembly 1 and the battery housing 2. Simultaneously, the first insulating member 12 also has a first through hole 121 corresponding to the terminal hole 112 on the top cover body 11, ensuring that the terminal 13 can smoothly pass through the top cover body 11 and extend to the desired position. The end of the terminal 13 is exposed through the first through hole 121 to facilitate subsequent connection with other battery tabs 31.
[0032] The first support member 14 is mainly used to support the battery tab 31. The support surface on the first support member 14 is set according to the end of the terminal post 13 and the position of the retaining wall. When there is a height difference between the end of the terminal post 13 and the retaining wall, the first support member 14 is generally inclined, so that one end of the support surface extends to the end face of the retaining wall and the other end extends to the end face of the terminal post 13. Figure 5 and Figure 6 As shown, the supporting surface can effectively support the battery tab 31 before and after bending, restraining the positional displacement of the battery tab 31 during the welding process and facilitating the welding of the battery tab 31. At the same time, when the battery tab 31 is bent, the first support member 14 can support the battery tab 31 and prevent the retaining wall from squeezing and damaging the battery tab 31.
[0033] The battery top cover assembly 1 provided by this utility model, by setting a first support member 14 with a specific support surface, so that its two ends abut against the end of the pole post 13 and the end face of the insulating wall respectively, effectively fills the gap between the end face of the pole post 13 and the wall, and provides stable support for welding the battery tab 31.
[0034] In some embodiments, such as Figures 1 to 4 As shown, two baffles are formed on the second side of the first insulating member 12, and the two baffles are along the width direction of the first insulating member 12. Figure 2 The first through hole 121 is located between two retaining walls, and the first support member 14 is located between the end of the pole post 13 and one of the retaining walls.
[0035] In this embodiment, the two baffles cooperate with each other and engage with the opening of the battery casing 2. The spacing between the two baffles provides suitable space for the opening of the first through hole 121, ensuring that the terminal post 13 can smoothly pass through the first through hole 121 and that its end is stably exposed outside the first through hole 121. Since the battery tab 31 is generally connected to the terminal post 13 from one side of the baffle, it is only necessary to place the first support member 14 between the end of the terminal post 13 and the corresponding baffle. One end of the support surface on the first support member 14 extends to the end face of the corresponding baffle and the other end extends to the end face of the terminal post 13, thereby more effectively filling the gap between the two and providing a solid and stable support platform for welding the battery tab 31.
[0036] When the battery tab 31 is bent, the presence of the first support member 14 effectively prevents the tab from shifting position during welding, ensuring a uniform contact area in the welding region, thereby improving welding quality and enhancing the strength and stability of the welded connection. Simultaneously, the support surface of the first support member 14 covers the edge of the retaining wall end face, preventing unnecessary compression damage to the tab during bending, extending battery life, and improving battery safety.
[0037] like Figures 1 to 4 As shown, the two retaining walls are the first retaining wall 122 and the second retaining wall 123, respectively. The height of the first retaining wall 122 is less than the height of the second retaining wall 123. The first support member 14 is disposed between the end of the pole post 13 and the first retaining wall 122.
[0038] In this embodiment, the height of the first baffle 122 is relatively low, while the height of the second baffle 123 is relatively high. Therefore, it is convenient for the battery tab 31 to be installed through the first baffle 122, while the second baffle 123 can play a major supporting and positioning role when the battery top cover assembly 1 is installed with the battery housing 2, ensuring the stability and sealing of the entire assembly within the battery housing 2.
[0039] When bending the battery tab 31, the first support member 14 effectively constrains the position of the tab, preventing it from shifting during welding, ensuring uniform contact area in the welding region, and improving welding quality. Simultaneously, the support surface of the first support member 14 covers the edge of the end face of the first baffle 122, preventing the first baffle 122 from causing compression damage to the tab during bending, extending the battery's lifespan, and improving its safety.
[0040] In some embodiments, such as Figure 1 and Figure 2 As shown, the battery top cover assembly 1 also includes a second support member 15. The second support member 15 is disposed between the end of the terminal post 13 and the second retaining wall 123. The second support member 15 and the first support member 14 form a clamping space suitable for restricting the end of the terminal post 13. The cooperation between the second support member 15 and the first support member 14 can be used to position the terminal post 13, which can effectively prevent the terminal post 13 from undergoing axial or radial displacement during battery use, ensuring that the end of the terminal post 13 always remains in the correct position, thereby improving the electrical connection stability and mechanical strength of the battery.
[0041] Both the second support member 15 and the first support member 14 can be wedge-shaped blocks. Through the cooperation of the wedge-shaped blocks, the second support member 15 and the first support member 14 can form a precise clamping space to ensure the accurate position of the end of the pole post 13, thereby improving the overall assembly accuracy of the battery top cover assembly 1.
[0042] To reduce local stress concentration in the pole post 13 under stress, multiple first support members 14 and / or second support members 15 are provided, with the multiple first support members 14 extending along the length direction of the first insulating member 12. Figure 2 In the X-axis direction), multiple second support members 15 extend along the length direction of the first insulating member 12 ( Figure 2The first support 14 and the second support 15 are positioned along the X-axis direction, thus dispersing the stress on the terminal post 13 under load to a wider area when it is fixed using the first support 14 and the second support 15. This prevents excessive local stress from damaging the terminal post 13 or its nearby components. Simultaneously, the multiple first support 14 and second support 15 provide more uniform support and restraint, better constraining the terminal post 13 in all directions, reducing displacement and vibration during use, and enhancing the overall stability of the battery top cover assembly 1.
[0043] In practice, the position and number of the first support member 14 and the second support member 15 can be adjusted. Multiple first support members 14 and second support members 15 can provide more uniform support and limiting effect, so that the pole post 13 is better constrained in all directions, reducing the displacement and vibration of the pole post 13 during use.
[0044] In some embodiments, such as Figures 1 to 4 As shown, the battery top cover assembly 1 also includes: a second insulating member 16. The second insulating member 16 is connected to the side of the top cover body 11 away from the first insulating member 12, and a mounting groove is formed on the side away from the top cover body 11. A second through hole 161 for the terminal post 13 to pass through is formed in the mounting groove at a position corresponding to the terminal post hole 112; and a riveting block 17 is disposed in the mounting groove, and a third through hole 171 for the terminal post 13 to pass through is formed at a position corresponding to the terminal post hole 112.
[0045] In this embodiment, the first insulating component 12 is the lower plastic of the cover plate body, and the second insulating component 16 is the upper plastic of the cover plate body. The second insulating component 16 has a mounting groove for mounting the riveting block 17. The riveting block 17 is mainly used to enhance the connection strength between the pole post 13 and the top cover body 11. The pole post 13 passes through the first through hole 121, the pole post hole 112, the second through hole 161, and the third through hole 171.
[0046] During the battery assembly process, the rivet block 17 can be riveted to the top cover body 11, thereby firmly riveting the terminal post 13 to the top cover body 11.
[0047] To achieve a seal on the terminal post 13, the battery top cover assembly 1 further includes a sealing ring 18. The sealing ring 18 is fitted onto the terminal post 13, and forms a seal with at least one of the sidewalls of the first through hole 121, the terminal post hole 112, and the second through hole 161. The sealing ring 18 fills the tiny gap between the terminal post 13 and the through hole through its elastic deformation, thereby preventing external liquids, gases, or impurities from entering the battery. Simultaneously, the sealing ring 18 also effectively prevents leakage of the electrolyte inside the battery.
[0048] To ensure a tight seal, the sealing ring 18 can simultaneously form a seal with the sidewalls of the first through hole 121, the terminal post hole 112, and the second through hole 161. This triple seal effectively guarantees the overall sealing performance of the battery top cover assembly 1. The sealing ring 18 can be made of rubber, such as nitrile rubber (NBR) or fluororubber (FKM). These materials have good elasticity and chemical corrosion resistance, and can maintain stable sealing performance over a wide temperature range.
[0049] To facilitate electrolyte filling of the battery, such as Figure 1 and Figure 3 As shown, a liquid injection hole 111 is formed on the top cover body 11, penetrating the top cover body 11. The liquid injection hole 111 provides a channel for directly injecting electrolyte into the battery, making the liquid injection operation simpler and faster. During battery production, electrolyte can be directly injected into the battery through the liquid injection hole 111. To prevent electrolyte leakage after liquid injection, the liquid injection hole 111 usually needs to be effectively sealed. Liquid injection plugs, welding, or other sealing technologies can be used to seal the liquid injection hole 111 to ensure the battery's sealing performance.
[0050] In this embodiment, a protective cover 124 is connected to the first insulating member 12. The protective cover 124 and the first insulating member 12 form a cavity communicating with the injection hole 111. That is, the protective cover 124 is provided at the position corresponding to the injection hole 111 on the first insulating member 12. A connecting hole 1241 is provided on the end face of the protective cover 124 opposite to the injection hole 111, which is offset from the injection hole 111. Both the connecting hole 1241 and the injection hole 111 are connected to the cavity, allowing electrolyte to pass through. However, by offsetting the connection, the pressure during the injection process can be buffered to avoid direct impact on the battery electrode assembly 3.
[0051] Furthermore, the protective cover 124 is generally provided with multiple connecting holes 1241. These connecting holes 1241 can disperse the pressure during the electrolyte injection process, reducing the possibility of electrolyte ejection due to excessive pressure in a single hole. This helps protect the internal electrode assembly of the battery from damage caused by pressure shocks.
[0052] This application also provides a battery, such as... Figures 1 to 7As shown, the battery includes: a battery casing 2, a battery top cover assembly 1, and a battery electrode assembly 3. The battery top cover assembly 1 is fixed to the opening of the battery casing 2; the battery top cover assembly 1 includes: a top cover body 11, a first insulating member 12, an electrode post 13, and a first support member 14. The top cover body 11 has an electrode post hole 112; a first side of the first insulating member 12 is connected to the top cover body 11, and a baffle is formed on the second side; a first through hole 121 is formed on the first insulating member 12 opposite to the electrode post hole 112; the electrode post 13 passes through the electrode post hole 112 and the first through hole 121, and the end of the electrode post 13 is exposed in the first through hole 121; the first support member 14 is disposed between the end of the electrode post 13 and the baffle, and the first support member 14 has a support surface, one end of which extends to the end face of the baffle, and the other end of which extends to the end face of the electrode post 13. The battery electrode assembly 3 is located inside the battery housing 2 and is provided with battery tabs 31. The battery tabs 31 extend along the support surface to connect with the end of the pole post 13.
[0053] In this embodiment, the first side of the first insulating member 12 is tightly and firmly connected to the top cover body 11, ensuring good electrical insulation between the top cover body 11 and the internal components of the battery. A baffle is provided on the second side of the first insulating member 12, such as... Figure 5 As shown, the retaining wall is mainly used for the installation of the entire battery top cover assembly 1 and the battery housing 2. Simultaneously, the first insulating member 12 also has a first through hole 121 corresponding to the terminal hole 112 on the top cover body 11, ensuring that the terminal 13 can smoothly pass through the top cover body 11 and extend to the desired position. The end of the terminal 13 is exposed through the first through hole 121 to facilitate subsequent connection with other battery tabs 31.
[0054] The first support member 14 is mainly used to support the battery tab 31. The support surface on the first support member 14 is set according to the end of the terminal post 13 and the position of the retaining wall. When there is a height difference between the end of the terminal post 13 and the retaining wall, the first support member 14 is generally inclined, so that one end of the support surface extends to the end face of the retaining wall and the other end extends to the end face of the terminal post 13. Figure 5 and Figure 6 As shown, the supporting surface can effectively support the battery tab 31 before and after bending, restraining the positional displacement of the battery tab 31 during the welding process and facilitating the welding of the battery tab 31. At the same time, when the battery tab 31 is bent, the first support member 14 can support the battery tab 31 and prevent the retaining wall from squeezing and damaging the battery tab 31.
[0055] The battery provided by this utility model, by setting a first support member 14 with a specific support surface, has its two ends abutting against the end of the pole post 13 and the end face of the insulating wall, respectively, effectively filling the gap between the end face of the pole post 13 and the wall, and providing stable support for welding the battery tab 31 and the pole post 13.
[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A battery top cover assembly, characterized in that, include: The top cover body has pole hole; A first insulating member has a first side connected to the top cover body and a second side having a baffle wall. A first through hole is formed on the first insulating member that is opposite to the pole hole. The electrode post is inserted into the electrode post hole and the first through hole, and the end of the electrode post is exposed in the first through hole; A first support member is disposed between the end of the pole post and the retaining wall. The first support member has a support surface, one end of which extends to the end face of the retaining wall, and the other end of which extends to the end face of the pole post.
2. The battery top cover assembly according to claim 1, characterized in that, Two baffles are formed on the second side of the first insulating member. The two baffles are spaced apart along the width direction of the first insulating member. The opening of the first through hole is located between the two baffles. The first support member is disposed between the end of the pole post and one of the baffles.
3. The battery top cover assembly according to claim 2, characterized in that, The two retaining walls are a first retaining wall and a second retaining wall, the height of the first retaining wall is less than the height of the second retaining wall, and the first support member is disposed between the end of the pole and the first retaining wall.
4. The battery top cover assembly according to claim 3, characterized in that, The battery top cover assembly also includes: A second support member is disposed between the end of the pole post and the second retaining wall, and a clamping space suitable for restricting the end of the pole post is formed between the second support member and the first support member.
5. The battery top cover assembly according to claim 4, characterized in that, The first support member and / or the second support member are provided in multiple forms.
6. The battery top cover assembly according to claim 1, characterized in that, The battery top cover assembly also includes: The second insulating member is connected to the side of the top cover body away from the first insulating member. A mounting groove is formed on the side away from the top cover body. A second through hole for the pole to pass through is formed in the mounting groove at the position corresponding to the pole hole. A riveting block is disposed in the mounting groove, and a third through hole is formed at the position corresponding to the pole hole for the pole to pass through.
7. The battery top cover assembly according to claim 6, characterized in that, The battery top cover assembly also includes: A sealing ring is fitted onto the pole post, and the sealing ring forms a seal with at least one of the sidewall of the first through hole, the sidewall of the pole post hole, and the sidewall of the second through hole.
8. The battery top cover assembly according to any one of claims 1-7, characterized in that, The top cover body has a liquid injection hole that penetrates the top cover body.
9. The battery top cover assembly according to claim 8, characterized in that, A protective cover is connected to the first insulating component. The protective cover and the first insulating component form a cavity that communicates with the injection hole. A communication hole is provided on one end face of the protective cover opposite to the injection hole, which is offset from the injection hole.
10. A battery, characterized in that, include: Battery casing; The battery top cover assembly as described in any one of claims 1-9 is fixed to the opening of the battery housing; A battery electrode assembly, located inside the battery housing, is provided with battery tabs, which extend along the support surface to connect with the end of the terminal post.