Battery top cover assembly and battery monomer

Abstract

The utility model relates to a battery top cover assembly and a battery monomer. The battery top cover assembly comprises a top cover plate, a pole and a gasket; the pole is provided with a boss and a limiting wall, the pole is inserted into the pole hole of the top cover plate, and the boss extends out of the pole hole and abuts against the top cover plate; the gasket is arranged between the pole and the top cover plate, the gasket is provided with a first limiting part, a second limiting part, a first protruding part and a second protruding part, the first limiting part is matched with the pole, the second limiting part is matched with the top cover plate, the side, away from the boss, of the first protruding part abuts against the limiting wall, and the second protruding part abuts against the side, away from the boss, of the top cover plate. The rotation of the pole relative to the top cover plate is stably limited, the anti-torsion performance of the pole is improved, the top cover plate abuts against the boss, the first protruding part abuts against the limiting wall, the second protruding part abuts against the top cover plate, the pole is stably limited to move relative to the top cover plate, the pole is stably installed on the top cover plate, compared with the prior art, an upper plastic structure is omitted, and the cost is reduced. And the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover assembly and a battery monomer. Background Art

[0002] At present, square batteries on the market are basically connected to external structures through positive and negative electrode assemblies. During the production process of the battery cell or after the battery cells are grouped, the battery will be vibrated during use, which will cause a certain torque to be generated between the positive and negative electrode assemblies and the external connectors. At this time, the pole assembly needs to resist this part of the torque, otherwise the pole assembly will continue to rotate, which will easily cause battery leakage, and then pose a huge threat to the safety of the battery cells.

[0003] Currently, most pole assemblies are anti-twisting by using ceramic columns or by welding the pole assemblies to the top cover sheet by laser welding, however, these anti-twisting structures have relatively complex processes or many parts, making the cost relatively high. Utility Model Content

[0004] Based on this, it is necessary to provide a battery top cover assembly to address the technical problem that most current pole assemblies use ceramic columns to prevent torsion or weld the pole assemblies to the top cover sheet through laser welding to achieve the anti-twist effect. However, these anti-twist structures have relatively complex processes or many parts, resulting in relatively high costs.

[0005] A battery top cover assembly, comprising:

[0006] A top cover plate, wherein a pole hole is provided on the top cover plate;

[0007] A pole, provided with a boss and a limiting wall, wherein the pole is inserted into the pole hole, and the boss extends out of the pole hole to abut against the top cover plate; and

[0008] A gasket is arranged between the pole and the top cover plate, and the gasket is provided with a first limiting portion, a second limiting portion, a first protruding portion and a second protruding portion. The first limiting portion cooperates with the pole to limit the rotation of the pole, and the second limiting portion cooperates with the top cover plate to limit the rotation of the gasket. The side of the first protruding portion away from the boss abuts against the limiting wall, and the second protruding portion abuts against the side of the top cover plate away from the boss to limit the pole from falling out of the pole hole.

[0009] In one embodiment, the outer wall of the pole includes a mounting plane, and an assembly hole for being sleeved on the pole is opened at a position on the gasket corresponding to the pole hole, and the first limiting portion is a first limiting plane arranged on the hole wall of the assembly hole, and the first limiting plane abuts against the mounting plane.

[0010] In one embodiment, the inner wall of the pole hole includes a first assembly plane, the second limiting portion is a second limiting plane provided on the outer side wall of the gasket, and the second limiting plane abuts against the first assembly plane.

[0011] In one of the embodiments, one of the inner wall of the pole hole and the outer wall of the gasket is provided with a limiting groove, and the other is provided with a limiting protrusion, and the limiting protrusion is plugged into and fits in the limiting groove.

[0012] In one embodiment, the battery top cover assembly also includes a lower plastic, which is connected to the side of the top cover plate facing away from the boss, and a mounting hole is opened on the lower plastic at a position corresponding to the pole hole, and a first latching protrusion is provided on the hole wall of the mounting hole, and the first latching protrusion abuts against the side of the second protrusion facing away from the boss.

[0013] In one of the embodiments, a third limiting plane is provided on the outer side of the gasket, and the side wall of the first protrusion includes a first matching plane, and the first matching plane abuts against the third limiting plane.

[0014] In one embodiment, the pole hole includes a first matching hole and a second matching hole that are interconnected, a step wall is provided between the first matching hole and the second matching hole, and the second protrusion is accommodated in the second matching hole and abuts against the step wall;

[0015] The lower plastic also includes a second latching protrusion, which is accommodated in the second matching hole, and the side wall of the second latching protrusion includes a second matching plane. A fourth limiting plane is provided on the side of the second protrusion away from the first protrusion, and the second matching plane abuts against the fourth limiting plane.

[0016] In one embodiment, a third matching plane is provided on a side of the second latching protrusion away from the second protruding portion, and a hole wall of the second matching hole includes a second assembly plane, and the second assembly plane abuts against the third matching plane.

[0017] In one embodiment, the battery top cover assembly also includes a sealing ring, which is sleeved on the pole, and one side of the sealing ring abuts against the boss, and the other side abuts against the top cover plate, and the sealing ring is used to seal the gap between the pole and the top cover plate.

[0018] The utility model also provides a battery cell, which can solve at least one of the above technical problems.

[0019] A battery cell comprises the above-mentioned battery top cover assembly.

[0020] Beneficial effects:

[0021] A battery top cover assembly provided by an embodiment of the utility model includes a top cover plate, a pole and a gasket; a pole hole is opened on the top cover plate; the pole is provided with a boss and a limiting wall, the pole is inserted into the pole hole, and the boss extends out of the pole hole to abut against the top cover plate; the gasket is arranged between the pole and the top cover plate, the gasket is provided with a first limiting portion, a second limiting portion, a first protruding portion and a second protruding portion, the first limiting portion cooperates with the pole to limit the rotation of the pole, the second limiting portion cooperates with the top cover plate to limit the rotation of the gasket, the side of the first protruding portion away from the boss abuts against the limiting wall, and the second protruding portion abuts against the side of the top cover plate away from the boss to limit the pole from slipping out of the pole hole. In the present application, the first limiting portion cooperates with the pole to limit the rotation of the pole, and the second limiting portion cooperates with the top cover plate to limit the rotation of the gasket, thereby stably limiting the rotation of the pole relative to the top cover plate, improving the torsional resistance of the pole, and the top cover plate abuts against the boss of the pole, the side of the first protrusion facing away from the boss abuts against the limiting wall, and the second protrusion abuts against the side of the top cover plate facing away from the boss, thereby stably limiting the movement of the pole relative to the top cover plate, so that the pole is stably installed on the top cover plate. Compared with the prior art, the upper plastic structure is reduced, thereby reducing the number of components in the battery top cover assembly in the present application and reducing the manufacturing cost.

[0022] The utility model also provides a battery cell, comprising the above-mentioned battery top cover assembly, and the battery cell can achieve at least one of the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A cross-sectional view of a battery top cover assembly provided in accordance with an embodiment of the present utility model.

[0024] Figure 2 An exploded view of a battery top cover assembly provided in one embodiment of the utility model.

[0025] Figure 3 A schematic diagram of a battery top cover assembly provided in accordance with an embodiment of the present utility model.

[0026] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0027] Figure 5 A schematic diagram of a pole in a battery top cover assembly provided in one embodiment of the utility model.

[0028] Figure 6 A schematic diagram of a gasket in a battery top cover assembly provided in one embodiment of the utility model.

[0029] Figure 7 A cross-sectional view of a gasket in a battery top cover assembly provided in one embodiment of the utility model.

[0030] Figure 8 A top view of a top cover plate in a battery top cover assembly provided in one embodiment of the utility model.

[0031] Fig. 9 A cross-sectional view of a top cover plate in a battery top cover assembly provided in one embodiment of the utility model.

[0032] Fig.10 A schematic diagram of the lower plastic in a battery top cover assembly provided in one embodiment of the utility model.

[0033] Figure Number:

[0034] 100-top cover plate; 110-pole hole; 111-first matching hole; 112-second matching hole; 114-second assembly plane; 115-third matching hole; 120-first assembly plane; 130-limiting groove; 200-pole; 210-boss; 220-groove; 221-limiting wall; 230-installation plane; 300-gasket; 310-main body; 320-first limiting plane; 330-second limiting plane; 340-first protrusion; 350-second protrusion; 360-assembly hole; 370-limiting convex; 380-third limiting plane; 390-fourth limiting plane; 400-lower plastic; 410-installation hole; 420-first clamping convex; 430-first matching plane; 440-second clamping convex; 450-second matching plane; 460-third matching plane; 500-sealing ring. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0041] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 A cross-sectional view of a battery top cover assembly provided in accordance with an embodiment of the present utility model. Figure 2 An exploded view of a battery top cover assembly provided in one embodiment of the utility model. Figure 3 A schematic diagram of a battery top cover assembly provided in accordance with an embodiment of the present utility model. Figure 4 for Figure 1 The battery top cover assembly provided by the utility model in one embodiment includes a top cover plate 100, a pole 200 and a gasket 300; the top cover plate 100 is provided with a pole hole 110; the pole 200 is provided with a boss 210 and a limiting wall 221, the pole 200 is inserted into the pole hole 110, and the boss 210 extends out of the pole hole 110 to abut against the top cover plate 100; the gasket 300 is arranged between the pole 200 and the top cover plate 100, and the gasket 300 is provided with a first limiting wall 221. The first limiting portion cooperates with the pole 200 to limit the rotation of the pole 200, and the second limiting portion cooperates with the top cover plate 100 to limit the rotation of the gasket 300. The side of the first protrusion 340 away from the boss 210 abuts against the limiting wall 221, and the second protrusion 350 abuts against the side of the top cover plate 100 away from the boss 210 to limit the pole 200 from falling out of the pole hole 110.

[0042] Specifically, in the present application, the first limiting portion cooperates with the pole 200 to limit the rotation of the pole 200, and the second limiting portion cooperates with the top cover plate 100 to limit the rotation of the gasket 300, thereby stably limiting the pole 200 from rotating relative to the top cover plate 100, improving the anti-torsion performance of the pole 200, and the top cover plate 100 abuts against the boss 210 of the pole 200, the first protrusion 340 abuts against the limiting wall 221 on the side away from the boss 210, and the second protrusion 350 abuts against the side of the top cover plate 100 away from the boss 210, thereby stably limiting the movement of the pole 200 relative to the top cover plate 100, so that the pole 200 is stably installed on the top cover plate 100, compared with the prior art, the upper plastic structure is reduced, thereby reducing the number of components in the battery top cover assembly in the present application, and reducing the manufacturing cost. Preferably, the boss 210 is arranged around the circumference.

[0043] It should be noted that the second protrusion 350 abuts against the side of the top cover plate 100 away from the boss 210, so that the movement of the gasket 300 relative to the top cover plate 100 toward the boss 210 is restricted, and the side of the first protrusion 340 away from the boss 210 abuts against the limiting wall 221 of the pole 200, so that the movement of the pole 200 relative to the gasket 300 toward the boss 210 is restricted, and the boss 210 of the pole 200 abuts against the top cover plate 100, so that the movement of the pole 200 relative to the top cover plate 100 is restricted, so that the pole 200 is stably installed in the pole hole 110 of the top cover plate 100. Among them, since the pole 200 is inserted into the pole hole 110, unless otherwise specified, the rotation mentioned in this application is a rotation around the axial direction of the pole hole 110, and the movement is a movement along the axial direction of the pole hole 110.

[0044] Furthermore, the gasket 300 includes a main body 310, a first protrusion 340 and a second protrusion 350 are arranged on opposite sides of the main body 310, the first limiting portion and the first protrusion 340 are arranged on the same side of the main body 310, and the second limiting portion and the second protrusion 350 are arranged on the same side of the main body 310.

[0045] Furthermore, the pole 200 is provided with a groove 220, which is plugged into the first protrusion 340, and the side wall of the groove 220 away from the boss 210 is configured as a limiting wall 221, so as to further stably limit the movement of the pole 200 relative to the gasket 300, that is, stably limit the movement of the pole 200 relative to the top cover plate 100. The gasket 300 is formed by injection molding, so there is no need to consider the assembly problem of the gasket 300 and the pole 200.

[0046] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 , Figure 5A schematic diagram of a pole in a battery top cover assembly provided in one embodiment of the utility model. Figure 6 A schematic diagram of a gasket in a battery top cover assembly provided in one embodiment of the utility model. Figure 7 A cross-sectional view of a gasket in a battery top cover assembly provided in one embodiment of the utility model. In one embodiment, the outer wall of the pole 200 includes a mounting plane 230, and a mounting hole 360 ​​for sleeved on the pole 200 is provided at a position corresponding to the pole hole 110 on the gasket 300, and the first limiting portion is a first limiting plane 320 provided on the hole wall of the mounting hole 360, and the first limiting plane 320 abuts against the mounting plane 230.

[0047] Specifically, the gasket 300 is sleeved on the pole 200 through the assembly hole 360, and abuts against the mounting plane 230 through the first limiting plane 320, thereby stably limiting the rotation of the pole 200 relative to the gasket 300, and improving the anti-torsion performance of the pole 200. Among them, the first limiting plane 320 can be one, two or more, as long as it can limit the rotation of the pole 200 relative to the gasket 300. Preferably, the number of the first limiting planes 320 is two, and they are arranged oppositely. Accordingly, the position and size of the mounting plane 230 are adapted to the first limiting plane 320.

[0048] The first protrusions 340 are arranged circumferentially, and the corresponding grooves 220 are arranged circumferentially, thereby increasing the limiting force of the gasket 300 on the movement of the pole 200 relative to the gasket 300. The second protrusions 350 are arranged circumferentially, thereby abutting against the top cover plate 100 more stably, so as to stably limit the movement of the gasket 300 relative to the top cover plate 100 along one side of the boss 210.

[0049] See also Figure 4 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 , Figure 8 A top view of a top cover plate in a battery top cover assembly provided in one embodiment of the utility model. Fig. 9 A cross-sectional view of a top cover plate in a battery top cover assembly provided in one embodiment of the utility model. In one embodiment, the inner wall of the pole hole 110 includes a first assembly plane 120, and the second limiting portion is a second limiting plane 330 provided on the outer side wall of the gasket 300, and the second limiting plane 330 abuts against the first assembly plane 120.

[0050] Specifically, the first assembly plane 120 is in contact with the second limiting plane 330, so that the gasket 300 is stably limited to rotate relative to the top cover plate 100, and the rotation between the pole 200 and the gasket 300 is limited, so that the rotation between the pole 200 and the top cover plate 100 is stably limited, thereby improving the anti-torsion ability of the pole 200. Among them, the first assembly plane 120 can be one, two or more, as long as it can limit the rotation of the gasket 300 relative to the top cover plate 100. Preferably, the number of the first assembly planes 120 is two, and they are arranged opposite to each other. Accordingly, the position and size of the second limiting plane 330 are adapted to the first assembly plane 120.

[0051] See also Figure 2 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 In one embodiment, one of the inner wall of the pole hole 110 and the outer wall of the gasket 300 is provided with a limiting groove 130, and the other is provided with a limiting protrusion 370, and the limiting protrusion 370 is plugged and matched with the limiting groove 130, so as to further stabilize and limit the rotation of the gasket 300 relative to the top cover plate 100. Among them, the number of limiting protrusions 370 can be one, two or more, and the number of limiting grooves 130 corresponds to the number of limiting protrusions 370. In this embodiment, the limiting protrusions 370 are arranged on the gasket 300, and the number is two, and they are symmetrically arranged.

[0052] See also Figure 1 , Figure 4 and Fig.10 , Fig.10 A schematic diagram of the lower plastic in the battery top cover assembly provided by one embodiment of the utility model. In one embodiment, the lower plastic 400 is connected to the side of the top cover plate 100 away from the boss 210, and a mounting hole 410 is provided on the lower plastic 400 at a position corresponding to the pole hole 110, and a first clamping protrusion 420 is provided on the hole wall of the mounting hole 410, and the first clamping protrusion 420 abuts against the side of the second protrusion 350 away from the boss 210, and the side of the second protrusion 350 close to the boss 210 abuts against the top cover plate 100, so that the axial movement of the gasket 300 in the pole hole 110 is stably restricted by the top cover plate 100 and the lower plastic 400, and the first protrusion 340 on the gasket 300 is engaged with the groove 220 of the pole 200, so as to further stably restrict the axial movement of the pole 200 relative to the top cover plate 100 in the pole hole 110. Preferably, the first clamping protrusion 420 is arranged around the circumference. The lower plastic 400 is bonded to the top cover plate 100 .

[0053] See also Figure 4 , Figure 6 and Fig.10In one embodiment, a third limiting plane 380 is provided on the outer side of the gasket 300 , and a side wall of the first latching protrusion 420 includes a first matching plane 430 , and the first matching plane 430 abuts against the third limiting plane 380 .

[0054] Specifically, the third limiting plane 380 is arranged on the side of the second protrusion 350 away from the boss 210, and abuts against the third limiting plane 380 through the first matching plane 430, so as to stably limit the rotation of the gasket 300 relative to the lower plastic 400, and the lower plastic 400 is connected to the top cover plate 100, thereby further stably limiting the rotation of the gasket 300 relative to the top cover plate 100.

[0055] The first matching plane 430 may be one, two or more, as long as it can limit the rotation of the gasket 300 relative to the lower plastic 400. Preferably, the number of the first matching planes 430 is two and they are arranged opposite to each other. Accordingly, the position and size of the third limiting plane 380 are adapted to the first matching plane 430.

[0056] See also Figure 4 , Figure 6 and Fig.10 In one embodiment, the pole hole 110 includes a first matching hole 111 and a second matching hole 112 that are connected to each other, and a step wall is provided between the first matching hole 111 and the second matching hole 112. The second protrusion 350 is accommodated in the second matching hole 112 and abuts against the step wall; the lower plastic 400 also includes a second clamping protrusion 440, the second clamping protrusion 440 is accommodated in the second matching hole 112, and the side wall of the second clamping protrusion 440 includes a second matching plane 450, and a fourth limiting plane 390 is provided on the side of the second protrusion 350 away from the first protrusion 340, and the second matching plane 450 abuts against the fourth limiting plane 390.

[0057] Specifically, the first matching hole 111 and the second matching hole 112 are coaxially arranged, and the aperture of the second matching hole 112 is larger than the aperture of the first matching hole 111, and the first assembly plane 120 is arranged on the hole wall of the first matching hole 111. The second matching plane 450 abuts against the fourth limiting plane 390, which increases the limiting force of the lower plastic 400 on the rotation of the gasket 300, and the rotation of the pole 200 relative to the gasket 300 is limited, thereby further improving the anti-torsion performance of the pole 200. Among them, the second matching plane 450 can be one, two or more, as long as it can limit the rotation of the gasket 300 relative to the lower plastic 400. Preferably, the number of the second matching planes 450 is two, and they are arranged oppositely. Correspondingly, the position and size of the fourth limiting plane 390 are adapted to the second matching plane 450. Preferably, the second clamping protrusions 440 are arranged around the circumference.

[0058] The second protrusion 350 is disposed against the step wall so that the second protrusion 350 can be completely accommodated in the second matching hole 112 to prevent the gasket 300 from extending out of the pole hole 110 to cause interference.

[0059] Furthermore, the opening of the limiting groove 130 is arranged on the step wall between the first matching hole 111 and the second matching hole 112, and the limiting protrusion 370 is arranged on the side of the second protrusion 350 close to the boss 210 and is connected to the second protrusion 350, so that the limiting protrusion 370 can extend into the limiting groove 130 through the opening, and the second protrusion 350 can stably abut against the step wall between the second matching hole 112 and the first matching hole 111.

[0060] See also Figure 4 , Figure 6 and Fig.10 In one embodiment, the pole hole 110 further includes a third matching hole 115, which is connected to and coaxially arranged with the second matching hole 112, and is located on a side of the second matching hole 112 away from the first matching hole 111. The aperture of the third matching hole 115 is larger than the aperture of the second matching hole 112. The lower plastic 400 partially extends into the third matching hole 115, and the lower plastic 400 abuts against the step wall portion between the third matching hole 115 and the second matching hole 112, and has a partial gap to fill more glue, so that the lower plastic 400 is more firmly bonded to the top cover plate 100.

[0061] See also Figure 4 , Figure 8 and Fig.10 In one embodiment, a third mating plane 460 is provided on a side of the second latch 440 away from the second protrusion 350, and the hole wall of the second mating hole 112 includes a second assembly plane 114, and the second assembly plane 114 abuts against the third mating plane 460, thereby stably limiting the rotation of the lower plastic 400 relative to the top cover plate 100, and the rotation of the gasket 300 relative to the lower plastic 400 is limited, thereby further stably limiting the rotation of the gasket 300 relative to the top cover plate 100.

[0062] The second assembly plane 114 may be one, two or more, as long as it can limit the rotation of the lower plastic 400 relative to the top cover plate 100. Preferably, the number of the second assembly planes 114 is two and they are arranged opposite to each other. Accordingly, the position and size of the third matching plane 460 are adapted to the second assembly plane 114.

[0063] See also Figure 1 , Figure 2 , Figure 3 and Figure 4In one of the battery top cover assemblies, a sealing ring 500 is further included. The sealing ring 500 is sleeved on the pole 200, and one side of the sealing ring 500 abuts against the boss 210, and the other side abuts against the top cover plate 100. The sealing ring 500 is used to seal the gap between the pole 200 and the top cover plate 100 to improve the waterproof performance of the battery top cover assembly.

[0064] The embodiment of the utility model also provides a battery cell, including the battery top cover assembly described above. In the present application, the first limiting portion cooperates with the pole 200 to limit the rotation of the pole 200, and the second limiting portion cooperates with the top cover plate 100 to limit the rotation of the gasket 300, thereby stably limiting the rotation of the pole 200 relative to the top cover plate 100, improving the anti-torsion performance of the pole 200, and the top cover plate 100 abuts against the boss 210 of the pole 200, the first protrusion 340 abuts against the limiting wall 221 on the side away from the boss 210, and the second protrusion 350 abuts against the side of the top cover plate 100 away from the boss 210, thereby stably limiting the movement of the pole 200 relative to the top cover plate 100, so that the pole 200 is stably installed on the top cover plate 100, and compared with the prior art, the upper plastic structure is reduced, thereby reducing the number of components in the battery cell and reducing the manufacturing cost.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery top cover assembly, characterized in that: The battery top cover assembly comprises: A top cover plate, wherein a pole hole is provided on the top cover plate; A pole, provided with a boss and a limiting wall, wherein the pole is inserted into the pole hole, and the boss extends out of the pole hole to abut against the top cover plate; and A gasket is arranged between the pole and the top cover plate, and the gasket is provided with a first limiting portion, a second limiting portion, a first protruding portion and a second protruding portion. The first limiting portion cooperates with the pole to limit the rotation of the pole, and the second limiting portion cooperates with the top cover plate to limit the rotation of the gasket. The side of the first protruding portion away from the boss abuts against the limiting wall, and the second protruding portion abuts against the side of the top cover plate away from the boss to limit the pole from falling out of the pole hole.

2. The battery top cover assembly according to claim 1, characterized in that: The outer side wall of the pole includes a mounting plane, and a mounting hole for being sleeved on the pole is opened at a position on the gasket corresponding to the pole hole. The first limiting portion is a first limiting plane arranged on the hole wall of the mounting hole, and the first limiting plane abuts against the mounting plane.

3. The battery top cover assembly according to claim 1, characterized in that: The inner wall of the pole hole comprises a first assembly plane, the second limiting portion is a second limiting plane arranged on the outer side wall of the gasket, and the second limiting plane abuts against the first assembly plane.

4. The battery top cover assembly according to claim 1, characterized in that: One of the inner wall of the pole hole and the outer wall of the gasket is provided with a limiting groove, and the other is provided with a limiting protrusion, and the limiting protrusion is plugged and matched with the limiting groove.

5. The battery top cover assembly according to any one of claims 1 to 4, characterized in that: The battery top cover assembly also includes a lower plastic, which is connected to a side of the top cover plate away from the boss, and a mounting hole is opened on the lower plastic at a position corresponding to the pole hole, and a first latching protrusion is provided on the hole wall of the mounting hole, and the first latching protrusion abuts against a side of the second protrusion away from the boss.

6. The battery top cover assembly according to claim 5, characterized in that: A third limiting plane is disposed on the outer side of the gasket, and the side wall of the first clamping protrusion includes a first matching plane, and the first matching plane abuts against the third limiting plane.

7. The battery top cover assembly according to claim 5, characterized in that: The pole hole comprises a first matching hole and a second matching hole which are interconnected, a step wall is provided between the first matching hole and the second matching hole, and the second protrusion is accommodated in the second matching hole and abuts against the step wall; The lower plastic also includes a second latching protrusion, which is accommodated in the second matching hole, and the side wall of the second latching protrusion includes a second matching plane. A fourth limiting plane is provided on the side of the second protrusion away from the first protrusion, and the second matching plane abuts against the fourth limiting plane.

8. The battery top cover assembly according to claim 7, characterized in that: A third matching plane is provided on a side of the second locking protrusion away from the second protruding portion, and a hole wall of the second matching hole includes a second assembly plane, and the second assembly plane abuts against the third matching plane.

9. The battery top cover assembly according to claim 1, characterized in that: The battery top cover assembly also includes a sealing ring, which is sleeved on the pole, and one side of the sealing ring abuts against the boss, and the other side abuts against the top cover plate. The sealing ring is used to seal the gap between the pole and the top cover plate.

10. A battery cell, characterized in that: A battery top cover assembly comprising any one of claims 1-9.

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