Battery top cover assembly and battery

Abstract

This utility model relates to the field of battery technology, providing a battery top cover assembly and a battery, comprising: a top cover body having terminal holes; an insulating member, fixed to the top cover body on a first side and having a first limiting boss and a second limiting boss on a second side, the first limiting boss and the second limiting boss being spaced apart to form a snap-fit ​​space suitable for setting a battery connecting piece, the first limiting boss having a first through hole penetrating the insulating member, the first through hole corresponding to the terminal hole; and a terminal, passing through the terminal hole and the first through hole, with one end of the terminal exposed in the first through hole for connection with the battery connecting piece. This battery top cover assembly, through the spaced-apart first and second limiting bosses on the insulating member, forms a snap-fit ​​space, providing multi-dimensional constraints on the battery connecting piece, effectively limiting lateral displacement and rotational offset of the battery connecting piece, significantly improving the positioning accuracy of the battery connecting piece, the terminal, and the battery tabs, and ensuring accurate alignment of the welding area.

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] With the rapid development of power battery technology, the connection reliability of battery modules has an increasingly prominent impact on overall performance. In traditional battery top cover assemblies, the battery connecting piece needs to be welded to both the top cover terminal and the internal tab simultaneously, which places stringent requirements on the positioning accuracy of the connection structure.

[0003] Existing technologies typically use simple positioning holes or single boss structures to limit the position of battery connectors. However, during actual assembly, factors such as the fit gap between the terminal and the insulator, as well as the deformation of the battery connector itself, can easily cause the battery connector to shift during welding. This positioning deviation can lead to insufficient contact area in the welding zone, resulting in poor soldering or increased welding resistance. Especially under high-current charging and discharging conditions, poorly welded areas can experience localized overheating, which in severe cases may lead to insufficient overcurrent capacity and the risk of battery thermal runaway. Utility Model Content

[0004] This utility model provides a battery top cover assembly and a battery to solve the problems of existing battery connectors being prone to positional displacement during welding, which can easily lead to incomplete welding or increased welding resistance.

[0005] In a first aspect, this utility model provides a battery top cover assembly, comprising:

[0006] The top cover body has pole hole;

[0007] An insulating component is fixed to the top cover body on the first side and has a first limiting boss and a second limiting boss on the second side. The first limiting boss and the second limiting boss are spaced apart to form a snap-fit ​​space suitable for setting the battery connecting piece. The first limiting boss has a first through hole that penetrates the insulating component and corresponds to the pole hole.

[0008] A terminal post is inserted into the terminal post hole and the first through hole, with one end of the terminal post exposed in the first through hole for connection with the battery connector.

[0009] According to the present invention, a battery top cover assembly is provided, wherein the first limiting boss is provided with a first extension edge, the first extension edge extends along the outer edge of one side of the first through hole at the end of the first through hole away from the second limiting boss, and the first extension edge and the second limiting boss are spaced apart to form the snap-fit ​​space.

[0010] According to the present invention, a battery top cover assembly is provided, wherein the first limiting boss is further provided with a second extension edge, the second extension edge extends along the outer edge of the other side of the first through hole at one end of the first through hole near the second limiting boss, and the height of the second extension edge is less than the height of the first extension edge, so as to form a stepped surface on the insulating member to support the battery connecting piece.

[0011] According to the present invention, a battery top cover assembly is provided, wherein an exhaust groove is formed on the first extension, the second extension, and at least one of the first extension and the second extension, and the exhaust groove communicates with the first through hole.

[0012] According to the present invention, a battery top cover assembly is provided, wherein the insulating member is provided with a connecting groove, one end of the connecting groove extends to the first through hole, and the other end extends to the exhaust groove.

[0013] According to the present invention, the side of the first extension facing the second limiting boss is a limiting plane, the side of the second limiting boss facing the first extension is a mating plane, and the battery connecting piece is engaged between the limiting plane and the mating plane.

[0014] According to the present invention, a battery top cover assembly is provided, wherein an explosion-proof hole is formed on the top cover body, and a vent hole corresponding to the position of the explosion-proof hole is formed on the insulating member, and the battery top cover assembly further includes an explosion-proof sheet disposed in the explosion-proof hole.

[0015] According to the present invention, a battery top cover assembly further includes: an explosion-proof film;

[0016] The explosion-proof membrane is disposed at one end outside the explosion-proof hole, and the explosion-proof sheet is disposed at one end inside the explosion-proof hole, forming an explosion-proof cavity between the explosion-proof sheet and the explosion-proof membrane.

[0017] According to the present invention, a battery top cover assembly is provided, wherein a liquid injection hole is formed on the top cover body, a protective cover is formed on the insulating member opposite to the liquid injection hole, and at least one communication hole communicating with the outside is provided on the side of the protective cover.

[0018] Secondly, this utility model also provides a battery, comprising:

[0019] Battery casing;

[0020] The battery electrode assembly is located inside the battery casing and is provided with battery electrode tabs;

[0021] The aforementioned battery top cover assembly is fixed to the opening of the battery casing;

[0022] A battery connector is disposed in the snap-fit ​​space, with one end connected to the terminal post and the other end connected to the battery tab.

[0023] The battery top cover assembly and battery provided by this utility model form a snap-fit ​​space through the first and second limiting bosses spaced apart on the insulating part, which constrains the battery connecting piece in multiple dimensions, effectively limiting the lateral displacement and rotational offset of the battery connecting piece, significantly improving the positioning accuracy of the battery connecting piece with the terminal post and the battery tab, and ensuring accurate alignment of the welding area. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a three-dimensional structural diagram of the battery top cover assembly provided by this utility model.

[0026] Figure 2 This is a three-dimensional structural diagram of the insulating component provided by this utility model.

[0027] Figure 3 This is a front view of the battery top cover assembly provided by this utility model.

[0028] Figure 4 This is a partial enlarged structural schematic diagram of the battery top cover assembly provided by this utility model.

[0029] Figure 5 yes Figure 4 A schematic diagram of section AA.

[0030] Figure 6 This is a schematic diagram of the battery provided by this utility model.

[0031] Figure 7 This is a disassembly diagram of the battery provided by this utility model.

[0032] Figure label:

[0033] 1. Battery top cover assembly; 11. Top cover body; 111. Fluid injection hole; 112. Terminal hole; 12. Insulating component; 121. First limiting boss; 1211. First through hole; 1212. First extension edge; 1213. Second extension edge; 122. Second limiting boss; 123. Vent groove; 124. Connecting groove; 125. Protective cover; 13. Terminal; 14. Explosion-proof membrane; 15. Explosion-proof sheet;

[0034] 2. Battery connector;

[0035] 3. Battery casing;

[0036] 4. Battery electrode assembly; 41. Battery tabs. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The following is combined Figures 1-7 This invention describes the battery top cover assembly 1 and the battery provided by this utility model.

[0042] This application provides a battery top cover assembly 1, such as... Figures 1 to 5 As shown, the battery top cover assembly 1 includes: a top cover body 11, an insulating member 12, and a terminal post 13. The top cover body 11 has a terminal post hole 112; the first side of the insulating member 12 is fixed to the top cover body 11, and the second side of the insulating member 12 is provided with a first limiting boss 121 and a second limiting boss 122. The first limiting boss 121 and the second limiting boss 122 are spaced apart to form a snap-fit ​​space suitable for setting the battery connecting piece 2. The first limiting boss 121 is provided with a first through hole 1211 penetrating the insulating member 12, and the first through hole 1211 corresponds to the terminal post hole 112; the terminal post 13 passes through the terminal post hole 112 and the first through hole 1211, and one end of the terminal post 13 is exposed in the first through hole 1211 for connection with the battery connecting piece 2.

[0043] To secure the battery connector 2, this embodiment provides a first limiting boss 121 and a second limiting boss 122. The snap-fit ​​space formed by the first limiting boss 121 and the second limiting boss 122 limits the battery connector 2.

[0044] During the welding process, after the battery connecting piece 2 is fixed in the snap-fit ​​space, one end of the battery connecting piece 2 can be welded to the exposed end of the terminal post 13, and the other end of the battery connecting piece 2 can be welded to the battery tab 41. Throughout the process, due to the multi-dimensional constraint of the snap-fit ​​space, the lateral displacement and rotational offset of the battery connecting piece 2 can be effectively limited, which can avoid poor welding caused by assembly gaps due to positioning, resulting in insufficient current in the battery connection structure and overheating during battery charging and discharging.

[0045] The battery top cover assembly 1 provided by this utility model forms a snap-fit ​​space through the first limiting boss 121 and the second limiting boss 122 spaced apart on the insulating part 12, which provides multi-dimensional constraint on the battery connecting piece 2, effectively restricts the lateral displacement and rotational offset of the battery connecting piece 2, significantly improves the positioning accuracy of the battery connecting piece 2 with the pole post 13 and the battery tab 41, and ensures accurate alignment of the welding area.

[0046] In some embodiments, such as Figure 1 and Figure 2 As shown, the first limiting boss 121 is provided with a first extension 1212. The first extension 1212 extends along the outer edge of one side of the first through hole 1211 at the end away from the second limiting boss 122. The first extension 1212 and the second limiting boss 122 are spaced apart to form a snap-fit ​​space, which provides precise positioning and multi-dimensional constraint for the battery connecting piece 2, effectively preventing lateral displacement and rotational offset of the battery connecting piece 2 during placement or welding, and ensuring the accuracy of welding.

[0047] Meanwhile, the first extension edge 1212 not only forms a snap-fit ​​space together with the second limiting protrusion 122, but also further defines the placement position of the battery connecting piece 2. Through its cooperation with the second limiting protrusion 122, the position of the battery connecting piece 2 can be precisely controlled, ensuring its accurate alignment with the terminal post 13 and the battery tab 41.

[0048] During the welding process, the presence of the first extension edge 1212 helps guide the battery connecting piece 2 to be accurately embedded into the snap-fit ​​space, making the welding operation more convenient. The welding equipment can quickly find the welding point and perform welding, improving production efficiency. At the same time, by setting the first extension edge 1212, it also helps to maintain the stability of the battery connecting piece 2 during the welding process, ensuring the smooth progress of the welding process and forming a firm welded connection.

[0049] In some embodiments, such as Figure 1 and Figure 2 As shown, the first limiting boss 121 is also provided with a second extension 1213, which extends along the outer edge of the other side of the first through hole 1211 at one end of the first through hole 1211 near the second limiting boss 122.

[0050] In this embodiment, the first extension edge 1212 and the second extension edge 1213 extend along the outer edges of both sides of the first through hole 1211. The height of the second extension edge 1213 is less than the height of the first extension edge 1212, and the second extension edge 1213 forms a stepped surface on the insulating member 12. The stepped surface can provide a reliable supporting plane for the battery connecting piece 2, making the battery connecting piece 2 more stable during placement and welding. At the same time, the snap-fit ​​space formed by the first extension edge 1212 and the second limiting boss 122 can further restrict the displacement of the battery connecting piece 2, ensuring its accurate alignment with the terminal post 13 and improving the accuracy and quality of welding.

[0051] During the welding process, the presence of the second extension edge 1213 helps guide the battery connector 2 to accurately embed into the snap-fit ​​space, making the welding operation more convenient. The welding equipment can quickly locate the welding point and perform welding, improving production efficiency.

[0052] In some embodiments, such as Figures 1 to 5 As shown, the side of the first extension 1212 facing the second limiting boss 122 is a limiting plane, and the side of the second limiting boss 122 facing the first extension 1212 is a mating plane. The battery connecting piece 2 is engaged between the limiting plane and the mating plane.

[0053] During installation of the battery connector 2, it is precisely positioned between the limiting plane and the mating plane. This ensures the stability of the battery connector 2, limiting its displacement in the lateral and longitudinal directions, as well as offsets in other directions such as rotation. In this way, the battery connector 2 can achieve precise alignment with the terminal post 13 and the battery tab 41, providing a reliable guarantee for subsequent welding processes.

[0054] Optionally, the shapes of the first extension 1212 (limiting plane) and the second extension 1213 on the first limiting boss 121, as well as the shape of the second limiting boss 122 (mating plane), are adjusted according to the shape of the battery connecting piece 2. For example, if the edge of the battery connecting piece 2 is rectangular, the limiting plane and the mating plane can be designed as matching rectangular planes to ensure that the battery connecting piece 2 is stably limited within the snap-fit ​​space and to prevent its displacement in the lateral and longitudinal directions. Alternatively, when the edge of the battery connecting piece 2 is arc-shaped, the limiting plane and the mating plane can be designed as corresponding arc-shaped curved surfaces to better fit the shape of the battery connecting piece 2 and enhance its stability in the rotational direction.

[0055] During the sealing test, the sealing performance between the terminal hole 112 and the terminal 13 is usually tested using helium gas (generally used to test the sealing performance when a sealing ring is installed between the terminal hole 112 and the terminal 13). However, the tight contact between the first through hole 1211 and the terminal 13, as well as between the insulating component 12 and the battery connecting piece 2, may prevent helium leakage, leading to inaccurate test results. To solve the above problem, such as... Figures 1 to 5 As shown, an exhaust groove 123 is formed on the first extension 1212, the second extension 1213, and at least one of the first extension 1212 and the second extension 1213, and the exhaust groove 123 communicates with the first through hole 1211. This provides a direct leakage path for helium detection, allowing helium to be discharged to the outside through the exhaust groove 123, the first through hole 1211, and the electrode hole 112. This facilitates accurate detection of leakage by the helium detector and ensures the sealing between the electrode hole 112 and the electrode 13.

[0056] Before actual testing, the battery top cover assembly 1 to be tested is first installed onto the battery, ensuring that the terminal hole 112 and the terminal 13 are tightly fitted. A certain amount of helium is then introduced into the battery according to the preset helium pressure and charging time, filling the battery completely with helium. The helium-filled battery is then placed into the vacuum detection chamber of the helium mass spectrometer leak detector. The detection chamber door is closed, and the equipment is started to begin vacuuming. The helium mass spectrometer leak detector automatically detects changes in helium concentration within the vacuum detection chamber. If there is a poor seal between the terminal hole 112 and the terminal 13, helium will leak to the outside through the exhaust groove 123, the first through hole 1211, and the terminal hole 112, and will be detected by the helium mass spectrometer leak detector.

[0057] It should be noted that the insulating component 12 is provided with a connecting groove 124, one end of which extends to the first through hole 1211, and the other end extends to the vent groove 123. The connecting groove 124 ensures that helium gas can smoothly exit from the battery through the vent groove 123, the first through hole 1211, and the terminal hole 112 into the detection chamber, thus being accurately detected by the helium mass spectrometer leak detector. The presence of the connecting groove 124 makes the helium gas leakage path more direct and smooth, avoiding detection errors caused by gas accumulation and improving the accuracy of the detection results. In this way, the sealing performance between the terminal hole 112 and the terminal 13 can be effectively evaluated, ensuring that the sealing performance of the battery top cover assembly 1 meets the requirements and providing a guarantee for the safe operation of the battery.

[0058] In some embodiments, such as Figures 1 to 5 As shown, an explosion-proof hole is formed on the top cover body 11, and a vent hole corresponding to the position of the explosion-proof hole is formed on the insulating member 12. The battery top cover assembly 1 also includes an explosion-proof sheet 15 disposed in the explosion-proof hole.

[0059] In this embodiment, the explosion-proof vent provides a pressure relief channel when the internal pressure of the battery is too high. A vent is provided on the insulating component 12, corresponding to the location of the explosion-proof vent. The vent allows gas to escape when the explosion-proof plate 15 ruptures, while preventing gas leakage under normal conditions. The explosion-proof plate 15 is a thin sheet structure, typically made of a metal material such as aluminum, and is installed inside the explosion-proof vent. When the internal pressure of the battery exceeds a certain value, the explosion-proof plate 15 ruptures, releasing the internal pressure and preventing the battery from exploding. The rupture pressure of the explosion-proof plate 15 needs to be precisely controlled to ensure reliable rupture and pressure relief when the pressure reaches a critical value.

[0060] In this embodiment, through the cooperation of explosion-proof holes, vent holes and explosion-proof sheet 15, the battery top cover assembly 1 can provide additional safety protection while ensuring normal function, and is suitable for battery application scenarios that require high safety and reliability.

[0061] Furthermore, such as Figure 1 and Figure 2 As shown, the battery top cover assembly 1 also includes: an explosion-proof membrane 14; the explosion-proof membrane 14 is disposed at one end outside the explosion-proof hole, and the explosion-proof sheet 15 is disposed at one end inside the explosion-proof hole, forming an explosion-proof cavity between the explosion-proof sheet 15 and the explosion-proof membrane 14.

[0062] In this embodiment, the explosion-proof membrane 14 prevents foreign objects from piercing the explosion-proof sheet 15. Simultaneously, the explosion-proof membrane 14 also prevents foreign objects, dust, and other contaminants from entering the explosion-proof vent, thus enhancing the explosion-proof capability. When the explosion-proof sheet 15 bursts, the presence of the explosion-proof cavity acts as a buffer, improving the battery's safety. The cooperation between the explosion-proof membrane 14 and the explosion-proof sheet 15 allows for rapid pressure relief when the internal pressure of the battery is excessively high, reducing the risk of explosion and improving battery safety.

[0063] In some embodiments, such as Figures 1 to 5 As shown, a liquid injection hole 111 is formed on the top cover body 11, penetrating the top cover body 11, and a protective cover 125 is formed on the insulating member 12 opposite to the liquid injection hole 111. The side of the protective cover 125 is provided with at least one communication hole that communicates with the outside.

[0064] In this embodiment, the injection hole 111 is used to inject electrolyte during battery manufacturing. A protective cover 125 is disposed on the insulating component 12, with its upper surface opposite the injection hole 111. A connecting hole is disposed on the side of the protective cover 125, communicating with the outside, primarily to prevent the injected electrolyte from directly impacting the inside of the battery cell. Generally, the protective cover 125 has multiple connecting holes around its perimeter to facilitate rapid electrolyte flow after injection.

[0065] This application also provides a battery, such as... Figure 6 and Figure 7As shown, the battery includes: a battery housing 3, a battery top cover assembly 1, and a battery connecting piece 2. A battery electrode group 4 is located inside the battery housing 3 and is provided with battery tabs 41; the battery top cover assembly 1 is fixed to the opening of the battery housing 3; the battery connecting piece 2 is disposed in the snap-fit ​​space, with one end connected to the terminal post 13 and the other end connected to the battery tab 41.

[0066] like Figures 1 to 5 As shown, the battery top cover assembly 1 includes: a top cover body 11, an insulating member 12, and a terminal post 13. The top cover body 11 has a terminal post hole 112; the first side of the insulating member 12 is fixed to the top cover body 11, and the second side of the insulating member 12 is provided with a first limiting boss 121 and a second limiting boss 122. The first limiting boss 121 and the second limiting boss 122 are spaced apart to form a snap-fit ​​space suitable for setting the battery connecting piece 2. The first limiting boss 121 is provided with a first through hole 1211 penetrating the insulating member 12, and the first through hole 1211 corresponds to the terminal post hole 112; the terminal post 13 passes through the terminal post hole 112 and the first through hole 1211, and one end of the terminal post 13 is exposed in the first through hole 1211 for connection with the battery connecting piece 2.

[0067] To secure the battery connector 2, this embodiment includes a first limiting boss 121 and a second limiting boss 122. The locking space formed by the first limiting boss 121 and the second limiting boss 122 limits the battery connector 2. During welding, after the battery connector 2 is fixed in the locking space, one end of the battery connector 2 can be welded to the exposed end of the terminal post 13, and the other end of the battery connector 2 can be welded to the battery tab 41. Throughout the process, due to the multi-dimensional constraint of the locking space, the lateral displacement and rotational offset of the battery connector 2 can be effectively limited, avoiding poor welding caused by assembly gaps due to positioning, which could lead to insufficient current in the battery connection structure and overheating during battery charging and discharging.

[0068] The battery provided by this utility model is equipped with the aforementioned battery top cover assembly 1. A snap-fit ​​space is formed by the first limiting boss 121 and the second limiting boss 122 spaced apart on the insulating member 12, which provides multi-dimensional constraint on the battery connecting piece 2, effectively limiting the lateral displacement and rotational offset of the battery connecting piece 2, significantly improving the positioning accuracy of the battery connecting piece 2 with the terminal post 13 and the battery tab 41, and ensuring accurate alignment of the welding area.

[0069] 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; An insulating component is fixed to the top cover body on the first side and has a first limiting boss and a second limiting boss on the second side. The first limiting boss and the second limiting boss are spaced apart to form a snap-fit ​​space suitable for setting the battery connecting piece. The first limiting boss has a first through hole that penetrates the insulating component and corresponds to the pole hole. A terminal post is inserted into the terminal post hole and the first through hole, with one end of the terminal post exposed in the first through hole for connection with the battery connector.

2. The battery top cover assembly according to claim 1, characterized in that, The first limiting boss has a first extension edge. The first extension edge extends along the outer edge of one side of the first through hole at the end of the first through hole away from the second limiting boss. The first extension edge and the second limiting boss are spaced apart to form the snap-fit ​​space.

3. The battery top cover assembly according to claim 2, characterized in that, The first limiting boss is also provided with a second extension edge. The second extension edge extends along the outer edge of the other side of the first through hole at one end of the first through hole near the second limiting boss. The height of the second extension edge is less than the height of the first extension edge, so as to form a stepped surface on the insulating member to support the battery connecting piece.

4. The battery top cover assembly according to claim 3, characterized in that, An exhaust groove is formed on the first extension edge, the second extension edge, and at least one of the first extension edge and the second extension edge, and the exhaust groove communicates with the first through hole.

5. The battery top cover assembly according to claim 4, characterized in that, The insulating component is provided with a connecting groove, one end of which extends to the first through hole and the other end extends to the exhaust groove.

6. The battery top cover assembly according to claim 2, characterized in that, The side of the first extension facing the second limiting boss is a limiting plane, and the side of the second limiting boss facing the first extension is a mating plane. The battery connecting piece is engaged between the limiting plane and the mating plane.

7. The battery top cover assembly according to any one of claims 1-6, characterized in that, The top cover body has an explosion-proof hole that penetrates the top cover body, and the insulating component has a vent hole corresponding to the position of the explosion-proof hole. The battery top cover assembly also includes an explosion-proof sheet disposed in the explosion-proof hole.

8. The battery top cover assembly according to claim 7, characterized in that, The battery top cover assembly also includes: an explosion-proof film; The explosion-proof membrane is disposed at one end outside the explosion-proof hole, and the explosion-proof sheet is disposed at one end inside the explosion-proof hole, forming an explosion-proof cavity between the explosion-proof sheet and the explosion-proof membrane.

9. The battery top cover assembly according to any one of claims 1-6, characterized in that, The top cover body has a liquid injection hole that penetrates the top cover body, and the insulating component has a protective cover opposite to the liquid injection hole. The side of the protective cover has at least one communication hole that communicates with the outside.

10. A battery, characterized in that, include: Battery casing; The battery electrode assembly is located inside the battery casing and is provided with battery electrode tabs; 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 connector is disposed in the snap-fit ​​space, with one end connected to the terminal post and the other end connected to the battery tab.

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