Battery top cover assembly and battery

Abstract

This utility model relates to the field of battery technology and provides a battery top cover assembly, including: a top cover body; and insulating components, including a first insulating component and a second insulating component disposed on one side of the top cover body for separating the top cover body from the battery's electrode assembly. A limiting notch is formed on the first insulating component, and a limiting component is formed on the second insulating component, extending into the limiting notch. The dimension of the limiting notch in the length and / or width direction is larger than the dimension of the limiting component. This battery top cover assembly utilizes the mutual cooperation between the limiting notch of the first insulating component and the limiting component of the second insulating component. While allowing relative displacement within a certain range, the offset of the first and second insulating components is strictly limited. When the insulating component deforms due to material shrinkage, the sliding cooperation between the limiting notch and the limiting component can adaptively adjust the positional deviation, ensuring precise alignment of the corresponding positions of the insulating component and the top cover body, and avoiding assembly misalignment problems caused by shrinkage.

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] Existing battery top cover assemblies typically achieve insulation between the electrode assembly and the top cover by setting a lower plastic structure on the underside of the top cover body. However, when the battery top cover has a large aspect ratio (i.e., the length of the top cover is significantly larger than its width), a longer lower plastic structure that matches its length is required.

[0003] Because these types of lower plastic parts are mostly manufactured using injection molding, material shrinkage (water loss) is unavoidable during the molding process. This shrinkage causes a relative misalignment between the pre-designed terminal hole positions on the lower plastic part and the corresponding terminal hole positions on the top cover body. Especially during assembly, the shrinkage deformation of the lower plastic part further exacerbates the hole misalignment problem, causing quality hazards such as difficulty in terminal assembly and seal failure, and may even lead to short circuit risks due to insufficient insulation spacing. Traditional one-piece lower plastic parts structures lack an effective displacement compensation mechanism, making it difficult to maintain precise alignment of the terminal hole positions after material shrinkage, which seriously restricts the reliability and safety of long battery top covers. Utility Model Content

[0004] This invention provides a battery top cover assembly and a battery to solve the problem that existing battery top cover assemblies have difficulty maintaining the precise alignment of the terminal hole positions after material shrinkage, which seriously restricts the reliability and safety of long-size battery top covers.

[0005] This utility model provides a battery top cover assembly, including:

[0006] Top cover body;

[0007] An insulating component includes a first insulating component and a second insulating component disposed on the top cover body for separating the top cover body from the battery electrode group. A limiting notch is formed on the first insulating component, and a limiting component is formed on the second insulating component, the limiting component extending into the limiting notch.

[0008] When the first insulating member moves relative to the second insulating member, the limiting member moves within the limiting notch to limit the relative displacement range of the first insulating member and the second insulating member by means of the shape of the limiting notch.

[0009] According to the present invention, a battery top cover assembly is provided, wherein an extension is formed on the first insulating member, and the limiting notch is formed on the extension;

[0010] The second insulating member has a receiving groove formed therein, and the limiting member is formed therein;

[0011] The extension is inserted into the receiving groove so that the relative position of the extension in the receiving groove is limited by the position of the limiting member in the limiting notch.

[0012] According to the present invention, a battery top cover assembly is provided, wherein the limiting member is a protrusion, and at least a portion of the protrusion is disposed in the limiting notch.

[0013] According to the present invention, a battery top cover assembly is provided, wherein the limiting notch is a strip-shaped notch that extends along the length or width direction of the top cover body.

[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 first insulating member or the second insulating member. 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 includes an explosion-proof sheet comprising:

[0018] A connecting part is connected inside the explosion-proof hole, and an opening is formed in the connecting part;

[0019] The explosion-proof part has a first explosion-proof layer and a second explosion-proof layer that are interconnected and sealed in the opening, wherein the thickness of the first explosion-proof layer is greater than the thickness of the second explosion-proof layer.

[0020] According to the present invention, a battery top cover assembly is provided, wherein a liquid injection hole is formed on the top cover body, and a protective cover is formed on the first insulating member or the second insulating member opposite to the liquid injection hole, and at least one through hole communicating with the liquid injection hole is provided on the side of the protective cover.

[0021] According to the present invention, a battery top cover assembly is provided, wherein a first terminal hole and a second terminal hole are formed on the top cover body, a third terminal hole is formed on the first insulating member opposite to the first terminal hole, and a fourth terminal hole is formed on the second insulating member opposite to the second terminal hole.

[0022] The battery top cover assembly also includes:

[0023] The first pole post is inserted into the first pole post hole and the third pole post hole;

[0024] The second pole is inserted into the second pole hole and the fourth pole hole.

[0025] This utility model also provides a battery, including a housing, an electrode assembly, and a battery top cover assembly, wherein the electrode assembly is located inside the housing, and the battery top cover assembly is fixed to the opening of the housing.

[0026] The battery top cover assembly and battery provided by this utility model utilize the interplay between the limiting notch of the first insulating component and the limiting component of the second insulating component. While allowing relative displacement within a certain range, the offset of the first and second insulating components is strictly limited. When the insulating component deforms due to material shrinkage, the sliding fit between the limiting notch and the limiting component can adaptively adjust the positional deviation, ensuring precise alignment between the corresponding positions of the insulating component and the top cover body, and avoiding assembly misalignment problems caused by shrinkage. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a three-dimensional structural diagram of the battery cover assembly provided by this utility model.

[0029] Figure 2 This is a disassembly diagram of the battery cover assembly provided by this utility model.

[0030] Figure 3 This is a front view of the battery cover assembly provided by this utility model.

[0031] Figure 4 yes Figure 3 A schematic diagram of section AA.

[0032] Figure 5 This is a schematic diagram of the first insulating component provided by this utility model.

[0033] Figure 6 This is a cross-sectional schematic diagram of the interior of the first insulating component provided by this utility model.

[0034] Figure 7 This is a schematic diagram of the second insulating component provided by this utility model.

[0035] Figure 8This is a cross-sectional schematic diagram of the interior of the second insulating component provided by this utility model.

[0036] Figure label:

[0037] 1. Top cover body; 11. Explosion-proof hole; 12. Liquid injection hole; 13. First pole hole; 14. Second pole hole;

[0038] 2. First insulating component; 21. Limiting notch; 22. Extension; 23. Protective cover; 231. Connecting hole; 24. Third pole hole; 25. Protective structure;

[0039] 3. Second insulating component; 31. Limiting component; 32. Receiving groove; 33. Fourth pole post hole;

[0040] 4. Explosion-proof sheet; 41. Explosion-proof cavity; 42. Connecting part; 43. First explosion-proof layer; 44. Second explosion-proof layer;

[0041] 5. First pole;

[0042] 6. Second pole;

[0043] 7. Third insulating component;

[0044] 8. Fourth insulating component;

[0045] 9. Explosion-proof film. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The following is combined with Figures 1-8 This invention describes the battery top cover assembly and the battery provided by this utility model.

[0051] This application provides a battery top cover assembly, such as... Figures 1 to 4 As shown, the battery top cover assembly includes a top cover body 1 and an insulating component. The insulating component is disposed on the top cover body 1. The insulating component is divided into a first insulating component 2 and a second insulating component 3. Both the first insulating component 2 and the second insulating component 3 are disposed on the top cover body 1 to separate the top cover body 1 from the battery electrode assembly, preventing direct contact between the electrode assembly and the top cover body 1 and avoiding short circuits. A limiting notch 21 is formed on the first insulating component 2, and a limiting component 31 is formed on the second insulating component 3, with the limiting component 31 extending into the limiting notch 21.

[0052] In this embodiment, since the dimension of the limiting notch 21 in the length and / or width direction is larger than the dimension of the limiting member 31, when the first insulating member 2 moves relative to the second insulating member 3, the limiting member 31 can move in the limiting notch 21 so as to limit the relative displacement range of the first insulating member 2 and the second insulating member 3 by the shape of the limiting notch 21.

[0053] During the manufacturing or assembly process, the insulating components may deform due to material shrinkage. The sliding fit between the limiting notch 21 and the limiting component 31 can adaptively adjust the positional deviation, allowing the first insulating component 2 and the second insulating component 3 to move relative to each other within a certain range. This ensures that the positions of the first insulating component 2 and the top cover body 1, as well as the positions of the second insulating component 3 and the top cover body 1, are always relative, avoiding the displacement of the first insulating component 2 and the second insulating component 3 caused by material deformation.

[0054] The battery top cover assembly provided by this utility model utilizes the interplay between the limiting notch 21 of the first insulating member 2 and the limiting member 31 of the second insulating member 3. While allowing relative displacement within a certain range, the offset of the first insulating member 2 and the second insulating member 3 is strictly limited. When the insulating member deforms due to material shrinkage, the sliding fit between the limiting notch 21 and the limiting member 31 can adaptively adjust the positional deviation, ensuring precise alignment of the insulating member with the corresponding position of the top cover body 1 and avoiding assembly misalignment problems caused by shrinkage.

[0055] In some embodiments, such as Figure 2 , Figures 5 to 8 As shown, an extension 22 is formed on the first insulating member 2, and a limiting notch 21 is formed on the extension 22; a receiving groove 32 is formed on the second insulating member 3, and a limiting member 31 is formed in the receiving groove 32. The shape of the limiting notch 21 determines the range of movement of the limiting member 31. The extension 22 is inserted into the receiving groove 32, thereby limiting the relative position of the extension 22 in the receiving groove 32 by the position of the limiting member 31 in the limiting notch 21. Furthermore, the receiving groove 32 can accommodate the extension 22 and can limit the direction of movement of the extension 22 to a certain extent.

[0056] When relative displacement occurs between the first insulating member 2 and the second insulating member 3 due to material deformation, the limiting member 31 slides within the limiting notch 21. The shape of the limiting notch 21 determines the range of movement of the limiting member 31, thereby strictly limiting the relative position of the extension 22 within the receiving groove 32. The cooperation between the extension 22 and the receiving groove 32 allows for relative displacement within a certain range, enabling adaptive adjustment of positional deviations caused by material shrinkage or deformation. Through the sliding cooperation of the limiting notch 21 and the limiting member 31, precise alignment of the first insulating member 2 and the second insulating member 3 with the corresponding positions of the top cover body 1 is ensured.

[0057] In this embodiment, the battery top cover assembly solves the assembly misalignment problem caused by material shrinkage by cooperating the extension 22 and the receiving groove 32, combined with the sliding mechanism of the limiting notch 21 and the limiting member 31.

[0058] In some embodiments, such as Figure 2 , Figures 5 to 8As shown, the limiting member 31 is a protrusion, and at least a portion of the protrusion is disposed in the limiting notch 21. The sliding fit between the protrusion and the limiting notch 21 allows the first insulating member 2 and the second insulating member 3 to move relative to each other within a certain range, thereby accommodating positional deviations caused by material shrinkage or deformation.

[0059] In the battery top cover assembly design, the limiting member 31 can have several alternatives. For example, the limiting member 31 can also be a limiting ring. The limiting ring is provided in the receiving groove 32 of the second insulating member 3, and the limiting ring cooperates with the extension 22 of the first insulating member 2 to limit the range of movement of the extension 22 in the receiving groove 32.

[0060] The limiting member 31 can also be an elastic limiting member 31. An elastic limiting member 31 (such as a spring or elastic sheet) is provided in the receiving groove 32 of the second insulating member 3. The elastic limiting member 31 cooperates with the extension 22 of the first insulating member 2, allowing elastic deformation within a certain range, thereby limiting the movement range of the extension 22.

[0061] In addition, a limiting rib can be provided on the side wall of the receiving groove 32. The limiting rib cooperates with the side of the extension 22 to limit the movement range of the extension 22.

[0062] In some embodiments, such as Figure 2 , Figures 5 to 8 As shown, the limiting notch 21 is a strip-shaped notch, typically elongated, but can be designed as a straight line, curve, or broken line. The strip-shaped notch can extend along the length of the top cover body 1, restricting the limiting member 31 to move only along its length. Alternatively, the strip-shaped notch can extend along its width, restricting the limiting member 31 to move only along its width. Alternatively, the strip-shaped notch can be inclined, limiting the range of movement of the limiting member 31 within a plane. The length and width of the strip-shaped notch can be adjusted according to design requirements to allow for different ranges of displacement.

[0063] For example, when the strip-shaped notch extends along its length, it has a starting end and a ending end in the length direction. The starting end and the ending end in the length direction define the range of movement of the limiting member 31, ensuring that the limiting member 31 can only move within the range of the strip-shaped notch.

[0064] In some embodiments, such as Figures 1 to 4 As shown, an explosion-proof hole 11 is formed on the top cover body 1, and a vent hole corresponding to the position of the explosion-proof hole 11 is formed on the first insulating member 2 or the second insulating member 3. The battery top cover assembly also includes an explosion-proof sheet 4 disposed in the explosion-proof hole 11.

[0065] In this embodiment, the explosion-proof hole 11 provides a pressure relief channel when the internal pressure of the battery is too high. A vent is provided on the first insulating member 2 or the second insulating member 3, corresponding to the position of the explosion-proof hole 11. The vent allows gas to escape when the explosion-proof plate 4 ruptures, while preventing gas leakage under normal conditions. The explosion-proof plate 4 is a thin sheet structure, typically made of a metal material such as aluminum, and is installed inside the explosion-proof hole 11. When the internal pressure of the battery exceeds a certain value, the explosion-proof plate 4 ruptures, releasing the internal pressure and preventing the battery from exploding. The rupture pressure of the explosion-proof plate 4 needs to be precisely controlled to ensure reliable rupture and pressure relief when the pressure reaches a critical value.

[0066] In this embodiment, through the cooperation of the explosion-proof hole 11, the vent hole and the explosion-proof sheet 4, the battery top cover assembly can provide additional safety protection while ensuring normal function, and is suitable for battery application scenarios that require high safety and reliability.

[0067] Furthermore, such as Figure 1 and Figure 2 As shown, the battery top cover assembly also includes: an explosion-proof membrane 9; the explosion-proof membrane 9 is disposed at one end outside the explosion-proof hole 11, the explosion-proof sheet 4 is disposed at one end inside the explosion-proof hole 11, and an explosion-proof cavity 41 is formed between the explosion-proof sheet 4 and the explosion-proof membrane 9.

[0068] In this embodiment, the explosion-proof membrane 9 prevents foreign objects from puncturing the explosion-proof sheet 4, and also prevents foreign objects, dust, etc., from entering the explosion-proof hole 11, thus enhancing the explosion-proof capability. When the explosion-proof sheet 4 bursts, the presence of the explosion-proof cavity 41 acts as a buffer, improving the safety of the battery. The cooperation between the explosion-proof membrane 9 and the explosion-proof sheet 4 can quickly release pressure when the internal pressure of the battery is too high, reducing the risk of explosion and improving the safety of the battery.

[0069] The explosion-proof disc 4 includes a connecting portion 42 and an explosion-proof portion. The connecting portion 42 is connected to the explosion-proof hole 11 and has an opening. The explosion-proof portion has a first explosion-proof layer 43 and a second explosion-proof layer 44 that are interconnected and sealed within the opening. The thickness of the first explosion-proof layer 43 is greater than the thickness of the second explosion-proof layer 44. Because the thickness of the first explosion-proof layer 43 is greater than that of the second explosion-proof layer 44, when the pressure of the explosion-proof disc 4 reaches a certain value, the second explosion-proof layer 44 ruptures first, releasing the internal pressure, while the first explosion-proof layer 43 provides additional strength and protection.

[0070] In this embodiment, the connecting part 42 is used to fix the explosion-proof hole 11 and the explosion-proof part. After the first explosion-proof layer 43 is placed in the opening, a "D"-shaped groove is formed in the opening. The second explosion-proof layer 44 is placed in the "D"-shaped groove. The thickness of the second explosion-proof layer 44 is thinner than that of other parts (the first explosion-proof layer 43). Therefore, when the internal pressure of the battery reaches the threshold, the second explosion-proof layer 44 (before the first explosion-proof layer 43) will burst first. This embodiment achieves precise pressure relief control by using explosion-proof layers of different thicknesses, while ensuring that the seal is maintained under normal conditions.

[0071] In addition, such as Figures 2 to 6 As shown, the first insulating member 2 or the second insulating member 3 is also provided with a protective structure 25 corresponding to the bottom of the explosion-proof cavity 41. On the one hand, the protective structure 25 prevents damage to the explosion-proof sheet 4 from the inside of the electrode assembly, and on the other hand, prevents the explosion-proof sheet 4 from directly entering the inside of the electrode assembly if it is damaged. At the same time, the protective structure 25 has a hollowed-out part so that the pressure inside the electrode assembly can directly act on the explosion-proof sheet 4.

[0072] In some embodiments, such as Figures 1 to 4 As shown, a liquid injection hole 12 is formed on the top cover body 1, penetrating the top cover body 1. A protective cover 23 is formed on the first insulating member 2 or the second insulating member 3, which is opposite to the liquid injection hole 12. The side of the protective cover 23 is provided with at least one through hole communicating with the liquid injection hole 12.

[0073] In this embodiment, the injection hole 12 is used to inject electrolyte during battery manufacturing. A protective cover 23 is mounted on the insulating component, and a connecting hole 231 is provided on the top of the protective cover 23, opposite to the injection hole 12. The connecting hole is located on the side of the protective cover 23 and communicates with the injection hole 12. Its main purpose is to prevent the injected electrolyte from affecting the inside of the electrode assembly, and it also allows the electrolyte to be smoothly injected into the battery during the injection process while preventing impurities from entering. Generally, the protective cover 23 has multiple connecting holes around its perimeter to facilitate electrolyte injection.

[0074] like Figures 1 to 4 As shown, a first pole hole 13 and a second pole hole 14 are formed on the top cover body 1. When the first insulating member 2 and the second insulating member 3 are installed on the top cover body 1 and the first insulating member 2 and the second insulating member 3 are not deformed, a third pole hole 24 opposite to the first pole hole 13 is formed on the first insulating member 2, and a fourth pole hole 33 opposite to the second pole hole 14 is formed on the second insulating member 3.

[0075] In this embodiment, the battery top cover assembly further includes: a first terminal 5, a second terminal 6, a third insulating member 7, and a fourth insulating member 8. One of the first terminal 5 and the second terminal 6 is the positive terminal, and the other is the negative terminal. Both the third insulating member 7 and the fourth insulating member 8 can be unsealed rings. The first terminal 5 passes through the first terminal hole 13 and the third terminal hole 24. The third insulating member 7 is provided between the sidewall of the first terminal hole 13 and the first terminal 5 to prevent the first terminal 5 from being electrically connected to the top cover body 1. The second terminal 6 passes through the second terminal hole 14 and the fourth terminal hole 33. The fourth insulating member 8 is provided between the sidewall of the second terminal hole 14 and the second terminal 6 to prevent the second terminal 6 from being electrically connected to the top cover body 1.

[0076] During manufacturing or assembly, insulating components may deform due to material shrinkage, causing misalignment between the originally opposing first and third pole hole 13 and the second and fourth pole hole 33. To avoid this, the sliding fit between the limiting notch 21 and the limiting member 31 adaptively adjusts the positional deviation, allowing the first insulating component 2 and the second insulating component 3 to move relative to each other within a certain range. This ensures that the first and third pole holes 13 and 24, and the second and fourth pole holes 14 and 33, remain aligned, preventing misalignment caused by material deformation.

[0077] This application also provides a battery, which includes: a housing, an electrode assembly, and a battery top cover assembly. The electrode assembly is located inside the housing, and the battery top cover assembly is fixed to the opening of the housing.

[0078] like Figures 1 to 4 As shown, the battery top cover assembly includes a top cover body 1 and an insulating member. The insulating member is disposed on the top cover body 1. The insulating member is divided into a first insulating member 2 and a second insulating member 3. Both the first insulating member 2 and the second insulating member 3 are disposed on the top cover body 1 to separate the top cover body 1 from the battery electrode assembly, preventing direct contact between the electrode assembly and the top cover body 1 and avoiding short circuits. A limiting notch 21 is formed on the first insulating member 2, and a limiting member 31 is formed on the second insulating member 3, extending into the limiting notch 21; the limiting notch 21 of the first insulating member 2 and the limiting member 31 of the second insulating member 3 cooperate. When the first insulating member 2 moves relative to the second insulating member 3, the limiting member 31 moves within the limiting notch 21 to limit the relative displacement range of the first insulating member 2 and the second insulating member 3 by the shape of the limiting notch 21.

[0079] During the manufacturing or assembly process, the insulating components in the battery may deform due to material shrinkage. The sliding fit between the limiting notch 21 and the limiting component 31 can adaptively adjust the positional deviation, allowing the first insulating component 2 and the second insulating component 3 to move relative to each other within a certain range. This ensures that the positions of the first insulating component 2 and the top cover body 1, as well as the positions of the second insulating component 3 and the top cover body 1, are always relative, preventing the first insulating component 2 and the second insulating component 3 from shifting due to material deformation.

[0080] The battery provided by this utility model has the aforementioned battery top cover assembly. The limiting notch 21 of the first insulating member 2 and the limiting member 31 of the second insulating member 3 cooperate with each other, allowing relative displacement of the first insulating member 2 and the second insulating member 3 within a certain range while strictly limiting the amount of offset. When the insulating member deforms due to material shrinkage, the sliding cooperation between the limiting notch 21 and the limiting member 31 can adaptively adjust the positional deviation, ensuring precise alignment of the insulating member with the corresponding position of the top cover body 1, and avoiding assembly misalignment problems caused by shrinkage of the insulating members in the battery.

[0081] 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: Top cover body (1); The insulating component includes a first insulating component (2) and a second insulating component (3) disposed on one side of the top cover body (1) for separating the top cover body (1) from the battery electrode group. A limiting notch (21) is formed on the first insulating component (2), and a limiting component (31) is formed on the second insulating component (3). The limiting component (31) extends into the limiting notch (21). The dimension of the limiting notch (21) in the length and / or width direction is greater than the dimension of the limiting member (31).

2. The battery top cover assembly according to claim 1, characterized in that, An extension (22) is formed on the first insulating member (2), and the limiting notch (21) is formed on the extension (22). The second insulating member (3) has a receiving groove (32) formed therein, and the limiting member (31) is formed in the receiving groove (32); The extension (22) is inserted into the receiving groove (32) to limit the relative position of the extension (22) in the receiving groove (32) by the position of the limiting member (31) in the limiting notch (21).

3. The battery top cover assembly according to claim 2, characterized in that, The limiting member (31) is a protrusion, and at least a portion of the protrusion is disposed in the limiting notch (21).

4. The battery top cover assembly according to claim 2, characterized in that, The limiting notch (21) is a strip-shaped notch that extends along the length or width of the top cover body (1).

5. The battery top cover assembly according to any one of claims 1-4, characterized in that, An explosion-proof hole (11) is formed on the top cover body (1) through the top cover body (1), and a vent hole corresponding to the position of the explosion-proof hole (11) is formed on the first insulating member (2) or the second insulating member (3). The battery top cover assembly also includes an explosion-proof sheet (4) disposed in the explosion-proof hole (11).

6. The battery top cover assembly according to claim 5, characterized in that, The battery top cover assembly also includes: an explosion-proof film (9); The explosion-proof membrane (9) is disposed at one end outside the explosion-proof hole (11), and the explosion-proof sheet (4) is disposed at one end inside the explosion-proof hole (11). An explosion-proof cavity (41) is formed between the explosion-proof sheet (4) and the explosion-proof membrane (9).

7. The battery top cover assembly according to claim 5, characterized in that, The explosion-proof sheet (4) includes: A connecting part (42) is connected inside the explosion-proof hole (11), and an opening is formed in the connecting part (42); The explosion-proof part has a first explosion-proof layer (43) and a second explosion-proof layer (44) that are interconnected and sealed in the opening, wherein the thickness of the first explosion-proof layer (43) is greater than the thickness of the second explosion-proof layer (44).

8. The battery top cover assembly according to any one of claims 1-4, characterized in that, The top cover body (1) has an injection hole (12) that penetrates the top cover body (1), and the first insulating member (2) or the second insulating member (3) has a protective cover (23) that is opposite to the injection hole (12). The side of the protective cover (23) is provided with at least one through hole that communicates with the injection hole (12).

9. The battery top cover assembly according to any one of claims 1-4, characterized in that, The top cover body (1) has a first pole hole (13) and a second pole hole (14), the first insulating member (2) has a third pole hole (24) opposite to the first pole hole (13), and the second insulating member (3) has a fourth pole hole (33) opposite to the second pole hole (14). The battery top cover assembly also includes: The first pole post (5) is inserted into the first pole post hole (13) and the third pole post hole (24); The second pole post (6) is inserted into the second pole post hole (14) and the fourth pole post hole (33).

10. A battery, characterized in that, include: The battery housing, the electrode assembly, and the battery top cover assembly as described in any one of claims 1-9, wherein the electrode assembly is located within the housing and the battery top cover assembly is fixed to an opening in the housing.

Images