Battery cover plate assembly and battery

Abstract

The utility model relates to battery technical field provides a kind of battery cover plate assembly and battery, battery cover plate assembly includes: battery top cover, is formed with convex hull part, recess is formed in convex hull part;Pole, it is worn in battery top cover, the height that convex hull part is outwardly convex is greater than the height that pole is exposed on battery top cover;Insulating part is set to the inside of battery top cover, insulating part is formed with recessed part corresponding the position of recess, recessed part is embedded in recess, recessed part is formed with accommodating space, accommodating space is used to accommodate the connecting piece and the battery tab of battery pole group after bending.The utility model provides battery cover plate assembly and battery, the height that convex hull part is outwardly convex is greater than the height that pole is exposed on battery cover plate, improves the whole battery cover plate assembly's lifting bearing capacity and heat dissipation performance.Simultaneously, by recess in convex hull part and the accommodating space formed by insulating part recessed part, accommodate connecting piece and battery tab, reduce the space occupied below battery top cover.

Description

Technical Field

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

[0002] In existing technologies, battery covers typically employ a single flat plate structure, with terminals directly mounted on the top cover. Depending on the length of the terminals, connecting them to the battery tabs often requires bending the connecting pieces. However, the bent connecting pieces occupy additional height space, resulting in wasted internal battery space and hindering improvements in battery energy density. Utility Model Content

[0003] This utility model provides a battery cover assembly and a battery to solve the problem that existing connecting pieces occupy additional height space after bending, resulting in wasted internal battery space.

[0004] This utility model provides a battery cover assembly, including: The battery top cover has an outwardly protruding convex portion, and a groove is formed inside the convex portion; The terminal post is inserted into the top cover of the battery, and the height of the protrusion of the convex portion is greater than the height of the terminal post exposed on the top cover of the battery. An insulating component is disposed on the inner side of the battery top cover. The insulating component has a recessed portion formed at the position corresponding to the groove. The recessed portion is embedded in the groove, and a receiving space is formed in the recessed portion. The receiving space is used to accommodate the bent connecting piece and the battery tab of the battery electrode assembly, so that the recessed portion cooperates with the battery electrode assembly to press the connecting piece and the battery tab of the battery electrode assembly.

[0005] According to the present invention, a battery cover assembly is provided, wherein the recessed portion is a recessed groove provided on the side of the battery top cover, the outer wall surface of the recessed groove near the battery top cover is in contact with the inner wall surface of the groove near the insulating member, and the inner wall surface of the recessed groove is used to press the bent connecting piece onto the battery tab, or to press the battery tab onto the bent connecting piece.

[0006] According to the present invention, a battery cover assembly is provided, wherein a plurality of protrusions are formed on the battery top cover, and a groove is formed in each of the protrusions, and the insulating member is provided with a recess corresponding to each groove position.

[0007] According to the present invention, a battery cover assembly is provided, wherein an explosion-proof hole is formed on the battery top cover, 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.

[0008] According to the present invention, a battery cover assembly further 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.

[0009] According to the present invention, the width of the battery top cover is greater than or equal to 30mm.

[0010] This utility model also provides a battery, comprising: Battery casing; A battery electrode assembly, located inside the battery casing, is provided with battery electrode tabs; The aforementioned battery cover assembly; A connecting piece is bent and disposed between the insulating member and the battery electrode assembly. One end of the connecting piece is connected to the terminal post, and the other end of the connecting piece is connected to the battery tab.

[0011] According to the present invention, a battery is provided, wherein the connecting piece includes: The first horizontal section is connected to the pole post; The second horizontal section is connected to the battery tabs; A vertical segment connects the first horizontal segment and the second horizontal segment; the recess presses the second horizontal segment onto the battery tab, or presses the battery tab onto the second horizontal segment.

[0012] According to the present invention, the connecting piece is connected to the electrode post by through welding.

[0013] According to the present invention, the connecting piece is seam welded to the electrode post.

[0014] The battery cover assembly and battery provided by this utility model have an outward protrusion of the convex portion that is greater than the height of the terminal post exposed on the battery top cover. This allows the convex portion to directly support external structures or heat sinks, improving the overall load-bearing capacity and heat dissipation performance of the battery cover assembly. Simultaneously, the receiving space formed by the groove within the convex portion and the recessed portion of the insulating component is specifically designed to accommodate the bent connecting piece and the battery terminal tabs of the battery assembly. The bent connecting piece and the stacked battery terminal tabs, which would otherwise need to be erected upwards, are embedded within this receiving space. This significantly reduces the space occupied below the battery top cover and effectively lowers the necessary distance between the battery top cover and the battery terminal assembly. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the battery provided by this utility model.

[0017] Figure 2 This is a disassembly diagram of the battery provided by this utility model.

[0018] Figure 3 This is a front view of the battery cover assembly provided by this utility model. Figure 4 yes Figure 3 A schematic diagram of section AA.

[0019] Figure 5 yes Figure 3 A schematic diagram of the BB section.

[0020] Figure 6 This is a schematic diagram of the connection between the connecting piece and the pole provided by this utility model.

[0021] Figure label: 1. Battery cover assembly; 11. Battery top cover; 111. Protrusion; 12. Terminal post; 13. Insulating component; 131. Recess; 1311. First horizontal section; 1312. Second horizontal section; 1313. Vertical section; 14. Explosion-proof film; 2. Connecting piece; 21. Terminal post perforation; 3. Battery terminal block; 31. Battery tabs; 4. Battery casing. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The following is combined with Figures 1-6 This invention describes the battery cover assembly 1 and the battery provided by this utility model.

[0027] This application provides a battery cover assembly 1, such as... Figures 1 to 5 As shown, the battery cover assembly 1 includes: a battery top cover 11, a terminal post 12, and an insulating member 13. The battery top cover 11 has an outwardly protruding convex portion 111, and a groove is formed inside the convex portion 111; the terminal post 12 passes through the battery top cover 11, and the height of the outward protrusion of the convex portion 111 is greater than the height of the terminal post 12 exposed on the battery top cover 11; the insulating member 13 is disposed on the inner side of the battery top cover 11, and a recessed portion 131 is formed on the insulating member 13 at the position corresponding to the groove, the recessed portion 131 is embedded in the groove, and a receiving space is formed inside the recessed portion 131, which is used to receive the bent connecting piece 2 and the battery tab 31 of the battery electrode group 3.

[0028] In this embodiment, a convex portion 111 is formed on the top surface of the battery top cover 11, and a portion of the terminal post 12 typically also extends through the top surface of the battery top cover 11. The outward protrusion of the convex portion 111 is greater than the height of the terminal post 12 exposed on the battery top cover 11. This height difference allows the convex portion 111 to directly support externally applied structures (such as battery pack top cover, module end plate, or bracket), or to serve as a stable support platform for the heat sink. This not only significantly improves the load-bearing capacity of the entire battery cover assembly 1 for the upper structure, ensuring mechanical stability, but also lays the foundation for a more efficient heat conduction path. The heat from the external heat sink can be directly conducted to the top cover through the convex portion 111 and then dissipated, or conditions can be created for the exhaust of internal heat, thereby improving heat dissipation performance.

[0029] Meanwhile, a groove is formed on the bottom surface of the convex portion 111, and an insulating member 13 is provided at the bottom of the battery top cover 11. The insulating member 13 forms a recess 131 in the groove corresponding to the position of the groove. A receiving space is formed on the side of the recess 131 opposite to the convex portion 111. The formation of this receiving space can save space in the battery height direction (Z-axis direction) and accommodate the bent connecting piece 2 and the battery tab 31 of the battery electrode group 3.

[0030] The battery cover assembly 1 provided by this utility model has an outward protrusion of the convex portion 111 that is greater than the height of the electrode post 12 exposed on the battery top cover 11. This allows the convex portion 111 to directly support external structures or heat sinks, improving the overall load-bearing capacity and heat dissipation performance of the battery cover assembly 1. Simultaneously, the receiving space formed by the groove within the convex portion 111 and the recessed portion 131 of the insulating component 13 is specifically designed to accommodate the bent connecting piece 2 and the battery electrode tabs 31 of the battery electrode assembly 3. The bent connecting piece 2 and the stacked battery electrode tabs 31, which originally needed to stand upright, are embedded within this receiving space. This significantly reduces the space occupied below the battery top cover 11 and effectively lowers the necessary distance between the battery top cover 11 and the battery electrode assembly 3.

[0031] In some embodiments, such as Figures 3 to 5 As shown, the recessed portion 131 is a recessed groove provided on the side of the battery top cover 11. The outer wall surface of the recessed groove near the battery top cover 11 is in contact with the inner wall surface of the groove near the insulating member 13. The inner wall surface of the recessed groove is used to press the bent connecting piece 2 onto the battery tab 31, or to press the battery tab 31 onto the bent connecting piece 2.

[0032] In this embodiment, the outer wall of the recessed groove is completely fitted with the inner wall of the groove, forming a rigid nested structure through a contour-following design. This prevents the insulating component 13 from shifting during vibration, disperses the impact of external loads, and effectively prevents the recessed portion from lateral displacement or rotational loosening under battery vibration or impact conditions. Simultaneously, the recessed groove presses the bent connecting piece 2 against the battery tab 31, securing the connecting piece 2 in a set position, eliminating the problem of the connecting piece 2 dangling and preventing the weld joint from fracturing due to vibration.

[0033] Furthermore, the contoured contact surface increases the effective contact area between the recessed portion 131 and the groove, allowing the reaction force from the connecting piece 2 on the recessed portion 131 to be evenly distributed across the entire wall of the groove, preventing deformation or cracking of the insulating component 13 due to localized stress concentration. Simultaneously, this design creates a continuous heat conduction path, allowing heat from the connecting piece 2 to be directly conducted through the recessed portion 131 to the groove wall of the convex portion 111, and then efficiently exchanged with the external heat dissipation structure through the convex portion 111, significantly improving heat transfer efficiency.

[0034] In some embodiments, such as Figures 1 to 3 As shown, the battery top cover 11 has a plurality of protrusions 111, each protrusion 111 having a groove, and the insulating member 13 has a recess 131 corresponding to each groove position.

[0035] In this embodiment, the battery top cover 11 has two symmetrically formed protrusions 111 along its length (X-axis direction). Each protrusion 111 is integrally stamped from the outer surface of the top cover and protrudes outward, with two independent and non-communicating grooves formed inside. The two protrusions 111 are located on the inner side of the two terminals 12, mirror-symmetrically arranged along the length of the top cover, and their spacing is designed to match the width of the battery cell tabs to ensure that the center of the groove is aligned with the welding position of the terminals. The protrusion height H of each protrusion 111 is consistent and is greater than the exposed height of the terminal 12. The two protrusions 111 form a dual bearing platform, which can simultaneously support the corresponding mounting positions of the external module end plate or heat sink.

[0036] Meanwhile, the double convex portions 111 allow heat to be conducted out from both sides of the convex portions 111, or to achieve simultaneous heat dissipation on both sides through the heat sink. If one side of the convex portion 111 has poor contact with the heat sink, the other side can still maintain heat dissipation efficiency. Each convex portion 111 has a groove on its back, and the insulating member 13 has two recesses 131 formed at each groove position. The bottoms of the two recesses 131 respectively press against different connecting pieces 2 and battery tabs 31, for example, they can respectively press down the positive electrode connecting piece and the negative electrode connecting piece, eliminating the problem of the connecting piece 2 being suspended and wobbling.

[0037] In some embodiments, such as Figures 1 to 3As shown, an explosion-proof hole is formed on the battery top cover 11, and a vent hole corresponding to the position of the explosion-proof hole is formed on the insulating member 13. The battery cover assembly also includes an explosion-proof sheet disposed in the explosion-proof hole.

[0038] 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 13, corresponding to the location of the explosion-proof vent. The vent allows gas to escape when the explosion-proof plate ruptures, while preventing gas leakage under normal conditions. The explosion-proof plate is a thin, sheet-like structure, typically made of a metal 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 ruptures, releasing the internal pressure and preventing the battery from exploding. The explosion-proof plate's rupture pressure can be precisely controlled to ensure reliable rupture and pressure relief when the pressure reaches a critical value.

[0039] This embodiment, through the combination of explosion-proof holes, vent holes, and explosion-proof sheets, enables the battery cover assembly to provide additional safety protection while ensuring normal function, making it suitable for battery application scenarios that require high safety and reliability.

[0040] Furthermore, such as Figures 1 to 3 As shown, the battery cover assembly 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 is disposed at one end inside the explosion-proof hole, with an explosion-proof cavity formed between the explosion-proof sheet and the explosion-proof membrane 14.

[0041] In this embodiment, the explosion-proof membrane 14 prevents foreign objects from puncturing the explosion-proof sheet. 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 bursts, the presence of the explosion-proof cavity acts as a buffer, improving the battery's safety. The combination of the explosion-proof membrane 14 and the explosion-proof sheet allows for rapid pressure relief when the internal pressure of the battery is excessively high, reducing the risk of explosion and improving battery safety.

[0042] Based on the above embodiments, in some embodiments, such as Figures 1 to 3 As shown, the width (length in the Y-axis direction) of the battery top cover 11 is greater than or equal to 30mm.

[0043] When the width of the battery top cover 11 is less than 30mm, the connecting piece 2 is difficult to fold into the groove of the protrusion 111. In order to facilitate the placement of the bent connector and the processing of the bent connector, the width of the battery top cover 11 generally needs to be set to greater than or equal to 30mm. At this length, the formed recess 131 can accommodate the bent connecting piece 2, significantly reducing the space occupied below the battery top cover 11 and effectively reducing the necessary distance between the battery top cover 11 and the battery electrode group 3.

[0044] This application also provides a battery, such as... Figures 1 to 5As shown, the battery includes: a battery casing 4, a battery electrode assembly 3, a battery cover assembly 1, and a connecting piece 2. The battery casing 4 is the outer casing of the entire battery. The battery electrode assembly 3 is located inside the battery casing 4 and is provided with battery tabs 31. The battery cover assembly 1 includes: a battery top cover 11, a terminal post 12, and an insulating member 13. The battery top cover 11 has an outwardly protruding convex portion 111, and a groove is formed inside the convex portion 111; the terminal post 12 passes through the battery top cover 11, and the outward protrusion height of the convex portion 111 is greater than the height of the terminal post 12 exposed on the battery top cover 11; the insulating member 13 is disposed on the inner side of the battery top cover 11, and a recessed portion 131 is formed on the insulating member 13 corresponding to the groove position. The recessed portion 131 is embedded in the groove, and a receiving space is formed inside the recessed portion 131 for accommodating the bent connecting piece 2 and the battery tabs 31 of the battery electrode assembly 3. The connecting piece 2 is located between the insulating part 13 and the battery electrode group 3. One end of the connecting piece 2 is connected to the terminal post 12, and the other end of the connecting piece 2 is connected to the battery tab 31.

[0045] In this embodiment, the battery casing 4 serves as the rigid outer shell of the battery, providing a sealed space and bearing external mechanical loads. The battery electrode assembly 3 is housed within the casing and is formed by stacking or winding several electrode sheets; the battery electrode assembly 3 has battery tabs 31 at its ends for current output. The top surface of the battery top cover 11 has a protrusion 111, and the terminal post 12 typically also partially extends through the top surface of the battery top cover 11. The protrusion 111 protrudes outward at a height greater than the height of the terminal post 12 exposed on the battery top cover 11. This height difference allows the protrusion 111 to directly support externally applied structures (such as battery pack top cover, module end plate, or bracket), or to serve as a stable support platform for the heat sink. This not only significantly improves the load-bearing capacity of the entire battery cover assembly 1 for the upper structure, ensuring mechanical stability, but also lays the foundation for a more efficient heat conduction path, allowing the heat from the external heat sink to be directly conducted to the top cover through the protrusion 111 and then dissipated, or creating conditions for internal heat dissipation, thereby improving heat dissipation performance.

[0046] Meanwhile, a groove is formed on the bottom surface of the convex portion 111, and an insulating member 13 is provided at the bottom of the battery top cover 11. The insulating member 13 forms a recess 131 in the groove corresponding to the position of the groove. A receiving space is formed on the side of the recess 131 opposite to the convex portion 111. The formation of this receiving space can save space in the battery height direction (Z-axis direction) and accommodate the bent connecting piece 2 and the battery tab 31 of the battery electrode group 3.

[0047] The battery provided by this utility model has an outward protrusion of the convex portion 111 that is greater than the height of the terminal post 12 exposed on the battery top cover 11. This allows the convex portion 111 to directly support external structures or heat sinks, improving the overall load-bearing capacity and heat dissipation performance of the battery cover assembly 1. Simultaneously, the receiving space formed by the groove within the convex portion 111 and the recessed portion 131 of the insulating member 13 is specifically designed to accommodate the bent connecting piece 2 and the battery tabs 31 of the battery electrode assembly 3. The bent connecting piece 2 and the stacked battery tabs 31, which originally needed to stand upright, are embedded within this receiving space. This significantly reduces the space occupied below the battery top cover 11 and effectively lowers the necessary distance between the battery top cover 11 and the battery electrode assembly 3.

[0048] In some embodiments, such as Figures 3 to 6 As shown, the connecting piece 2 includes a first horizontal section 1311, a second horizontal section 1312, and a vertical section 1313. The first horizontal section 1311 is connected to the terminal post 12; the second horizontal section 1312 is connected to the battery tab 31; the vertical section 1313 is connected between the first horizontal section 1311 and the second horizontal section 1312; the recessed portion 131 presses the second horizontal section 1312 onto the battery tab 31, or presses the battery tab 31 onto the second horizontal section 1312.

[0049] Specifically, the first horizontal segment 1311 extends horizontally and is welded to the top or side of the electrode post 12 to achieve conductive connection with the electrode post 12; the second horizontal segment 1312 is parallel to the stacked area of ​​the battery tab 31 and is used for ultrasonic welding or laser welding with the tab; the vertical segment 1313 connects the first horizontal segment 1311 and the second horizontal segment 1312 and extends along the height direction of the battery (Z-axis) so that the connecting piece 2 has a Z-shaped outline.

[0050] Depending on the bending position and height of the connecting piece 2, the bottom surface of the recessed portion 131 can press the second horizontal section 1312 tightly onto the upper surface of the battery tab 31, or the bottom surface of the recessed portion 131 can be used to press the battery tab 31 onto the second horizontal section 1312. This creates a surface-to-surface welding area between the battery tab 31 and the connecting piece 2, preventing fatigue fracture of the tab due to suspension.

[0051] In some embodiments, such as Figure 4 and Figure 6 As shown, the connecting piece 2 is connected to the pole post 12 by penetration welding or seam welding.

[0052] When using penetration welding, a pole through hole 21 is opened on the connecting piece 2 at the position corresponding to the pole 12. After the lower end of the pole 12 passes through the through hole, the outer periphery of the pole 12 and the edge of the through hole are formed into an annular molten pool by laser penetration welding, so as to ensure that the ultra-thin connecting piece 2 can also obtain sufficient welding strength and avoid incomplete welding.

[0053] When seam welding is used, the pole post 12 has a flat structure, and the area where the connecting piece 2 overlaps with it is formed by continuous laser seam welding to form one or more straight or curved seams, thus welding the connecting piece 2 and the pole post 12 together.

[0054] This embodiment uses through-welding / seam welding, eliminating the need for additional adapters, reducing the number of parts, and minimizing the space occupied by welding while ensuring connection strength.

[0055] 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 cover assembly, characterized in that, include: The battery top cover has an outwardly protruding convex portion, and a groove is formed inside the convex portion; The terminal post is inserted into the top cover of the battery, and the height of the protrusion of the convex portion is greater than the height of the terminal post exposed on the top cover of the battery. An insulating component is disposed on the inner side of the battery top cover. The insulating component has a recessed portion formed at the position corresponding to the groove. The recessed portion is embedded in the groove, and a receiving space is formed in the recessed portion. The receiving space is used to accommodate the bent connecting piece and the battery tab of the battery electrode assembly.

2. The battery cover assembly according to claim 1, characterized in that, The recessed portion is a recessed groove provided on the side of the battery top cover. The outer wall surface of the recessed groove near the battery top cover fits against the inner wall surface of the groove near the insulating component. The inner wall surface of the recessed groove is used to press the bent connecting piece onto the battery tab, or to press the battery tab onto the bent connecting piece.

3. The battery cover assembly according to claim 1, characterized in that, The battery top cover has multiple protrusions, each of which has a groove, and the insulating component has a recess corresponding to each groove position.

4. The battery cover assembly according to claim 1, characterized in that, An explosion-proof hole is formed on the top cover of the battery, and a vent hole corresponding to the position of the explosion-proof hole is formed on the insulating component. The battery cover assembly also includes an explosion-proof sheet disposed in the explosion-proof hole.

5. The battery cover assembly according to claim 4, characterized in that, The battery 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.

6. The battery cover assembly according to any one of claims 1-5, characterized in that, The width of the battery top cover is greater than or equal to 30mm.

7. 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; Battery cover assembly as described in any one of claims 1-6; A connecting piece is bent and disposed between the insulating member and the battery electrode assembly. One end of the connecting piece is connected to the terminal post, and the other end of the connecting piece is connected to the battery tab.

8. The battery according to claim 7, characterized in that, The connecting piece includes: The first horizontal segment is connected to the pole post; The second horizontal section is connected to the battery tabs; A vertical segment connects the first horizontal segment and the second horizontal segment; the recess presses the second horizontal segment onto the battery tab, or presses the battery tab onto the second horizontal segment.

9. The battery according to claim 7, characterized in that, The connecting piece is connected to the pole by a through-weld.

10. The battery according to claim 7, characterized in that, The connecting piece is welded to the pole post.

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