Plastic part of battery monomer and battery monomer

Abstract

The utility model discloses a plastic part of a battery monomer and the battery monomer, and relates to the technical field of batteries, the plastic part of the battery monomer comprises a plastic body and a gasket, the plastic body is provided with a mounting hole, the mounting hole penetrates through the plastic body along the thickness direction of the plastic body, and the gasket is arranged on the plastic body. The gasket is fixedly arranged on the surface of one side of the plastic body, and the gasket is adjacent to the mounting hole. According to the plastic part of the battery monomer, the gasket is arranged, so that the creep deformation of the plastic body can be counteracted, the risk that the middle position of the connecting block is low and the edge position of the connecting block is high is reduced, the percent of pass of the battery monomer is favorably improved, and the service life of the battery monomer is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a plastic part of battery monomer and the battery monomer with the plastic part of having. BACKGROUND

[0002] In the related art, in the battery monomer production and manufacturing process, the pole and the connecting block can be riveted, and after riveting, the pole generates tension on the connecting block. A plastic part is provided between the connecting block and the pole, and the plastic part is always in a compressed state. Because the material of the plastic part is relatively soft, the plastic part will creep and deform under long-term pressure, and the connecting block will have a low middle position and a high edge position, which can easily cause the battery monomer to be unqualified and affect the service life of the battery monomer. SUMMARY

[0003] The utility model aims at at least solves one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide a plastic part of battery monomer, the gasket can offset the creep deformation amount of the plastic body, reduce the risk of the connecting block having a low middle position and a high edge position, and is beneficial to improving the qualified rate of the battery monomer and prolonging the service life of the battery monomer.

[0004] The utility model further provides a battery monomer using the above plastic part.

[0005] According to the plastic part of the battery monomer of the first aspect of the utility model embodiment, the plastic body is formed with a mounting hole, the mounting hole penetrates the plastic body along the thickness direction of the plastic body, the gasket is fixed on one side surface of the plastic body, and the gasket is adjacent to the mounting hole.

[0006] According to the plastic part of the battery monomer of the application embodiment, the gasket can offset the creep deformation amount of the plastic body, reduce the risk of the connecting block having a low middle position and a high edge position, and is beneficial to improving the qualified rate of the battery monomer and prolonging the service life of the battery monomer.

[0007] According to some embodiments of the utility model, the gasket is provided around the mounting hole along the circumference of the mounting hole.

[0008] According to some embodiments of the utility model, the gasket is a plurality of, and the plurality of gaskets are provided around the mounting hole along the circumference of the mounting hole.

[0009] According to some embodiments of the utility model, the gasket is two, and the two gaskets are oppositely arranged.

[0010] According to some embodiments of the present application, the gasket is provided with an inclined surface at the edge of the surface away from the plastic body along the arrangement direction of the gasket and the plastic body, and the inclined surface is inclined towards the edge of the gasket from the gasket to the plastic body.

[0011] According to some embodiments of the present application, the gasket is provided with a flat surface at the surface away from the plastic body, and the flat surface is adjacent to and located inside the inclined surface.

[0012] According to some embodiments of the present application, the inclined surface is two, and the two inclined surfaces are opposite and spaced apart, and the flat surface is located between the two inclined surfaces.

[0013] According to some embodiments of the present application, the gasket and the plastic body are integrally formed.

[0014] According to some embodiments of the present application, the gasket is configured as a plastic part.

[0015] According to the battery cell of the second aspect of the present application, the plastic part of the battery cell is as described in the above embodiments.

[0016] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a schematic view of two gaskets arranged opposite to each other according to embodiments of the present application;

[0019] Figure 2 is a schematic view of a plastic part according to embodiments of the present application;

[0020] Figure 3 is an exploded view of a battery cell according to embodiments of the present application.

[0021] REFERENCE NUMERALS:

[0022] battery cell 1,

[0023] plastic part 10, plastic body 11, mounting hole 111, first groove structure 112, gasket 12, inclined surface 121, flat surface 122,

[0024] connecting block 20, first assembly hole 21,

[0025] pole 30,

[0026] Cover plate 40, second assembly hole 41,

[0027] Middle plastic 50, third assembly hole 51,

[0028] Gasket 60, fourth assembly hole 61,

[0029] Explosion-proof valve 71, lower plastic 72, electrode assembly 73, shell 74. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0031] The following will be described with reference to Figures 1-3 The plastic part 10 of the battery monomer 1 according to the embodiments of the present application can be installed on the battery monomer 1.

[0032] The plastic part 10 of the battery monomer 1 according to the first aspect of the present application can include a plastic body 11 and a gasket 12, the plastic body 11 is formed with an installation hole 111, the installation hole 111 penetrates the plastic body 11 along the thickness direction of the plastic body 11, and the gasket 12 is fixedly arranged on one side surface of the plastic body 11 and is adjacent to the installation hole 111. Figures 1-3

[0033] It should be noted that during the production and manufacturing of the battery monomer, the pole and the connecting block can be riveted and connected, and after riveting, the pole generates a pulling force on the connecting block. The plastic part is arranged between the connecting block and the pole, and the plastic part is always in a compressed state. Because the material of the plastic part is relatively soft, under the condition of long-term pressure, the plastic part will creep and deform, the connecting block will be low in the middle position and high in the edge position, which is easy to cause the battery monomer to be unqualified and affect the service life of the battery monomer.

[0034] Based on this, the embodiments of the present application propose a plastic part 10 of a battery monomer 1, the plastic body 11 and the gasket 12 can be arranged in sequence along the first direction, and the present application takes the battery monomer 1 as an example placed in the upward direction. The first direction can be the height direction of the battery monomer 1. Figure 3 When the plastic part 10 is arranged as shown in the direction, the first direction can be Figure 3 ​The Z direction in the plastic body 11. The plastic body 11 can be made of silica gel, rubber, polyurethane and the like. The plastic body 11 can play an insulating role, prevent the battery monomer 1 from short circuiting, and improve the safety of the battery monomer 1. The plastic body 11 is formed with a mounting hole 111 which can penetrate the plastic body 11 along the thickness direction of the plastic body 11 (i.e. the first direction). The battery monomer 1 can include a cover plate 40 provided with a connecting block 20 and a pole 30, both of which can be assembled on the cover plate 40. The plastic body 11 can be located between the connecting block 20 and the pole 30. When the pole 30 is connected to the connecting block 20, the pole 30 can be provided in the mounting hole 111.

[0035] As an example, the connecting block 20 can be formed with a first assembly hole 21 which can penetrate the connecting block 20 along the thickness direction of the connecting block 20 (i.e. the first direction), and the pole 30 can extend into the first assembly hole 21 and be assembled with the connecting block 20. The first assembly hole 21 can be provided in the first direction corresponding to the mounting hole 111, and the cross-sectional shape and size of the first assembly hole 21 can be the same as those of the mounting hole 111.

[0036] The gasket 12 can be provided on one side surface of the plastic body 11 along the first direction, along the axial direction of the mounting hole 111. The gasket 12 has opposite first and second side surfaces, and the gasket 12 is provided on the first or second side surface, or both the first and second side surfaces. When the gasket 12 is installed on the battery monomer 1, the gasket 12 can be provided on the side of the plastic body 11 facing the connecting block 20, or the gasket 12 can be provided on the side of the plastic body 11 away from the connecting block 20. The gasket 12 can be adhesively connected to the plastic body 11, or the gasket 12 can be integrally formed with the plastic body 11. The gasket 12 can be adjacent to the mounting hole 111 along the radial direction of the mounting hole 111, and the side wall of the gasket 12 close to the mounting hole 111 can be adjacent to the inner wall of the mounting hole 111. Along the first direction, the gasket 12 can avoid the mounting hole 111, thereby preventing the gasket 12 from hindering the pole 30 from being provided in the mounting hole 111. When the pole 30 is connected to the connecting block 20, the pole 30 can generate a pulling force along the first direction on the connecting block 20, and the plastic body 11 is in a compressed state. Because the material of the plastic body 11 is relatively soft, the plastic body 11 may

[0037] As an example, the battery cell 1 can include the cover plate 40, the middle plastic 50, and the sealing gasket 60, the connecting block 20, the plastic body 11, the cover plate 40, the middle plastic 50, the sealing gasket 60, and the pole 30 can be arranged along the first direction. When the pole 30 is inserted into the mounting hole 111, the first assembly hole 21, and connected with the connecting block 20, the plastic body 11, the cover plate 40, the middle plastic 50, and the sealing gasket 60 are all clamped between the pole 30 and the connecting block 20, and the middle plastic 50 and the sealing gasket 60 can be made of rubber, silicone or other materials. The cover plate 40 can form a second assembly hole 41, the second assembly hole 41 can penetrate the cover plate 40 along the thickness direction of the cover plate 40 (i.e. the first direction), the second assembly hole 41 can be arranged opposite to the mounting hole 111 along the first direction, and the cross-sectional shape and size of the second assembly hole 41 can be the same as those of the mounting hole 111. The middle plastic 50 can form a third assembly hole 51, the third assembly hole 51 can penetrate the middle plastic 50 along the thickness direction of the middle plastic 50 (i.e. the first direction), the third assembly hole 51 can be arranged opposite to the mounting hole 111 along the first direction, and the cross-sectional shape and size of the third assembly hole 51 can be the same as those of the mounting hole 111.

[0038] The sealing gasket 60 can be configured as an annular structure, the sealing gasket 60 can form a fourth assembly hole 61, the fourth assembly hole 61 can be arranged opposite to the mounting hole 111 along the first direction, the cross-sectional shape and size of the fourth assembly hole 61 can be the same as those of the mounting hole 111, and the sealing gasket 60 can be sleeved on the pole 30. The pole 30 can be inserted into the fourth assembly hole 61, the third assembly hole 51, the second assembly hole 41, the mounting hole 111, and the first assembly hole 21, thereby achieving the effect of cooperating and assembling the pole 30 and the connecting block 20.

[0039] When the pole 30 is connected with the connecting block 20, the pole 30 generates a pulling force on the connecting block 20 along the first direction, the plastic body 11, the cover plate 40, the middle plastic 50 and the sealing gasket 60 are clamped between the pole 30 and the connecting block 20, and the plastic body 11, the cover plate 40, the middle plastic 50 and the sealing gasket 60 are subjected to a pressure along the first direction, and the plastic body 11, the cover plate 40, the middle plastic 50 and the sealing gasket 60 are always in a compressed state. The pole 30 is arranged in the first assembly hole 21 and is assembled with the connecting block 20, the first assembly hole 21, the mounting hole 111, the third assembly hole 51 and the fourth assembly hole 61 are arranged correspondingly along the first direction, and the plastic body 11, the middle plastic 50 and the sealing gasket 60 are subjected to a pressure. Since the plastic body 11, the middle plastic 50 and the sealing gasket 60 are soft, the plastic body 11, the middle plastic 50 and the sealing gasket 60 may be subjected to a creep deformation after being compressed for a long time. The plastic body 11, the middle plastic 50 and the sealing gasket 60 are subjected to a creep deformation. By arranging the gasket 12, the gasket 12 can offset the creep deformation of the plastic body 11, the middle plastic 50 and the sealing gasket 60, reduce the risk of the connecting block 20 being low in the middle and high at the edges, and improve the yield of the battery monomer 1 and prolong the service life of the battery monomer 1.

[0040] As an example, the battery monomer 1 can further include an explosion-proof valve 71 and a lower plastic 72. The explosion-proof valve 71 can timely release the internal pressure of the battery, effectively reduce the risk of explosion of the battery monomer 1 due to excessive internal pressure, and be installed on the cover plate 40. In the first direction, the lower plastic 72 can be arranged below the middle plastic 50, and part of the pole 30 can be arranged between the middle plastic 50 and the lower plastic 72. The lower plastic 72 can be made of rubber, silicone or the like. The battery monomer 1 can include an electrode assembly 73 and a shell 74. The electrode assembly 73 can be arranged in the shell 74, the shell 74 is formed with an opening, and the cover plate 40 can be sealed in the opening. The cover plate 40, the electrode assembly 73 and the shell 74 can cooperate to form the battery monomer 1.

[0041] In some embodiments of the utility model, as shown in Figure 2 The gasket 12 is arranged around the mounting hole 111 along the circumference of the mounting hole 111.

[0042] When the plastic part 10 is clamped between the pole 30 and the connecting block 20, and the pole 30 generates a pulling force on the connecting block 20 in the first direction, the plastic part 10 is compressed. The part of the plastic body 11 adjacent to the mounting hole 111 is subjected to pressure along the circumference of the mounting hole 111, and the plastic body 11 can be subjected to creep deformation. The third assembly hole 51 and the fourth assembly hole 61 are arranged corresponding to the mounting hole 111 in the first direction, and the part of the middle plastic 50 adjacent to the third assembly hole 51 and the gasket 60 are subjected to pressure, and the part of the middle plastic 50 adjacent to the third assembly hole 51 and the gasket 60 are subjected to creep deformation. The gasket 12 is connected with the plastic body 11, and the gasket 12 can be arranged around the mounting hole 111 along the circumference of the mounting hole 111, the gasket 12 can cover the deformed part of the plastic body 11, the gasket 12 can offset the creep deformation of the plastic body 11, the middle plastic 50 and the gasket 60 in the first direction, further reduce the risk of the connecting block 20 being low in the middle position and high in the edge position, and more conducive to improving the pass rate of the battery monomer 1 and further prolonging the service life of the battery monomer 1.

[0043] As an example, the gasket 12 can be formed with a notch, the notch of the gasket 12 can be adjacent to the mounting hole 111, the notch can be adapted to the shape of the mounting hole 111, and the inner wall of the notch can be coplanar with the inner wall of the mounting hole 111. For example: the notch can be configured as a circular, circular arc or other structure, the radius of the notch can be the same as the radius of the mounting hole 111, and when the notch is configured as a circular arc structure, the gasket 12 can be multiple, and the multiple gaskets 12 can collectively cover the circumference of the mounting hole 111.

[0044] In some embodiments of the present application, the gasket 12 is multiple, and the multiple gaskets 12 are arranged around the mounting hole 111 along the circumference of the mounting hole 111.

[0045] The gasket 12 can be multiple, and the multiple gaskets 12 can be arranged on the same side of the plastic body 11 in the first direction, and the multiple gaskets 12 can be arranged along the circumference of the mounting hole 111. As an example, any two adjacent gaskets 12 abut. As another example, at least two adjacent gaskets 12 are spaced apart. By arranging multiple gaskets 12 along the circumference of the mounting hole 111, the coverage area of the gasket 12 can be increased, which is more conducive to achieving the effect of the gasket 12 offsetting the creep deformation of the plastic body 11, the middle plastic 50 and the gasket 60 in the first direction. According to the shape and size of the gasket 12, different numbers of gaskets 12 can be selected so that the multiple gaskets 12 can offset the deformation of the plastic body 11, the middle plastic 50 and the gasket 60. The embodiments of the present application take two gaskets 12 as an example for description.

[0046] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , the gasket 12 is two, and the two gaskets 12 are oppositely arranged.

[0047] The gasket 12 is connected with the plastic body 11. The gasket 12 can be two, the gaps of the two gaskets 12 can be configured as semicircular structures, the two gaskets 12 can be oppositely arranged, and the two gaskets 12 can be arranged around the mounting hole 111 in the circumferential direction of the mounting hole 111, so that the two gaskets 12 are collectively arranged around the mounting hole 111, and the two gaskets 12 can offset the creep deformation of the plastic body 11, the middle plastic 50 and the sealing gasket 60 in the first direction. As an example, the plastic body 11 can be formed with a first groove structure 112, the first groove structure 112 can extend in the second direction, and the first groove structure 112 can be located at the middle of the plastic body 11 in the third direction. When the plastic part 10 is arranged as shown in Figure 2 the direction, the second direction can be the X direction in Figure 2 , and the third direction can be the Y direction in Figure 2 . The first direction, the second direction and the third direction are perpendicular to each other. The gasket 12 can be located on the same side of the plastic body 11 as the first groove structure 112, the gasket 12 can avoid the first groove structure 112, the gasket 12 can be two, the two gaskets 12 can be oppositely arranged in the third direction, the two gaskets 12 can be arranged on both sides of the first groove structure 112 respectively, and the two gaskets 12 can be arranged on both sides of the mounting hole 111 in the third direction respectively. The two gaskets 12 are oppositely arranged around the mounting hole 111, the two gaskets 12 can avoid the first groove structure 112, so as to adapt to the structure of the plastic body 11, so that the gasket 12 can offset the deformation of the plastic body 11, the middle plastic 50 and the sealing gasket 60 without affecting the assembly of various parts of the battery monomer 1.

[0048] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 , along the arrangement direction of the gasket 12 and the plastic body 11, the edge of the gasket 12 away from the surface of the plastic body 11 is formed with an inclined surface 121, and the inclined surface 121 is inclined toward the edge of the gasket 12 from the direction of the gasket 12 to the plastic body 11.

[0049] Along the arrangement direction of the gasket 12 and the plastic body 11 (i.e. the first direction), the edge of the gasket 12 away from one side surface of the plastic body 11 is formed with an inclined surface 121, and the inclined surface 121 has a certain width. From the direction of the gasket 12 to the plastic body 11, the inclined surface 121 is inclined toward the edge of the gasket 12, the edge of the gasket 12 is connected with the plastic body 11, and the inclined surface 121 can extend to the plastic body 11. As an example, when the gasket 12 is two, the two gaskets 12 are oppositely arranged in the third direction, and the inclined surface 121 can extend in the second direction.

[0050] By arranging the inclined surface 121, the probability of a gap between the gasket 12 and an adjacent component can be reduced, and the gasket 12 can better fit the adjacent component of the plastic part 10. As an example, when the gasket 12 is located between the plastic body 11 and the connecting block 20, the gasket 12 can better fit the connecting block 20, and the sealing between the plastic body 11 and the connecting block 20 can be improved. As another example, when the gasket 12 is located between the plastic body 11 and the cover plate 40, the gasket 12 can better fit the cover plate 40, and the sealing between the plastic body 11 and the cover plate 40 can be improved.

[0051] In some embodiments of the present application, as shown in Figure 1 and Figure 2 The surface of the gasket 12 away from the plastic body 11 forms a flat surface 122, and the flat surface 122 is adjacent to and located inside the inclined surface 121.

[0052] Along the arrangement direction of the gasket 12 and the plastic body 11 (i.e. the first direction), the surface of the gasket 12 away from the plastic body 11 forms a flat surface 122, which can be parallel to the surface of the plastic body 11 facing the gasket 12. The distance between the flat surface 122 and the plastic body 11 is the maximum thickness of the gasket 12. The gasket 12 with a certain thickness can be used to offset the deformation of the plastic body 11, the middle plastic 50, and the sealing gasket 60 along the first direction. The flat surface 122 is adjacent to the inclined surface 121, and the inclined surface 121 can be located between the edge of the gasket 12 and the flat surface 122, and the flat surface 122 is located inside the inclined surface 121. It should be noted that the side close to the center of the gasket 12 is the inside. By arranging the flat surface 122, the gasket 12 can better fit the adjacent component, and the probability of a gap between the gasket 12 and the adjacent component can be reduced.

[0053] In some embodiments of the present application, as shown in Figure 1 The inclined surface 121 is two, and the two inclined surfaces 121 are opposite and spaced apart, and the flat surface 122 is located between the two inclined surfaces 121.

[0054] The two inclined surfaces 121 can be arranged on both sides of the flat surface 122, i.e. the two inclined surfaces 121 can extend from the connection between the inclined surface 121 and the flat surface 122 to the edge of the gasket 12, so that the gasket 12 can better fit the adjacent component of the plastic part 10. As an example, when the gasket 12 is two, the two gaskets 12 are arranged opposite along the third direction, and the two inclined surfaces 121 can be arranged opposite and spaced apart along the second direction.

[0055] In some embodiments of the present application, along the arrangement direction of the gasket 12 and the plastic body 11, the edge of the gasket 12 away from the surface of the plastic body 11 can not form an inclined surface 121, which facilitates the production and processing of the gasket 12 and is conducive to improving the production efficiency of the gasket 12.

[0056] In some embodiments of the utility model, gasket 12 and plastic body 11 are integrally formed.

[0057] In the production process of plastic part 10, gasket 12 can be integrally formed with plastic body 11 by injection molding. Integrally forming gasket 12 and plastic body 11 can improve the overall structural stability of gasket 12 and plastic body 11, reduce the steps of assembling gasket 12 and plastic body 11, and improve the production efficiency and assembly efficiency of plastic part 10.

[0058] In some embodiments of the utility model, gasket 12 is configured as a plastic part.

[0059] Gasket 12 configured as a plastic part is a separate component, gasket 12 can be applied to different structures of cover plate 40, gasket 12 can be connected with different structures of plastic body 11, which is beneficial to improve the versatility and practicality of gasket 12, and gasket 12 configured as a plastic part is not easy to deform, which can effectively compensate for the height difference caused by the deformation of plastic body 11, middle plastic 50 and sealing gasket 60, gasket 12 can be recycled and reused, which is beneficial to reduce the cost.

[0060] According to the battery monomer 1 of the second aspect embodiment of the utility model, the plastic part 10 of the battery monomer 1 in the above embodiment is included.

[0061] According to the battery monomer 1 of the embodiment of the application, the plastic part 10 of the above embodiment is used, which is beneficial to improve the safety of the battery monomer 1 and will not affect the subsequent operation of battery production.

[0062] The plastic part 10 of the battery monomer 1 and other configurations and operations of the battery monomer 1 according to the embodiment of the utility model are known to those skilled in the art, which will not be described in detail here.

[0063] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A plastic component for a battery cell, characterized in that, include: A plastic body (11) having a mounting hole (111) extending through the plastic body (11) along its thickness direction. Gasket (12), the gasket (12) is fixed to one side surface of the plastic body (11), and the gasket (12) is adjacent to the mounting hole (111).

2. The plastic component of the battery cell according to claim 1, characterized in that, The gasket (12) is disposed around the mounting hole (111) circumferentially.

3. The plastic component of the battery cell according to claim 2, characterized in that, There are multiple gaskets (12), and the multiple gaskets (12) are arranged around the mounting hole (111) in the circumferential direction.

4. The plastic part of the battery cell according to claim 3, characterized in that, There are two gaskets (12), and the two gaskets (12) are arranged opposite to each other.

5. The plastic part of the battery cell according to any one of claims 1-4, characterized in that, Along the arrangement direction of the gasket (12) and the plastic body (11), the edge of the gasket (12) away from the surface of the plastic body (11) forms an inclined surface (121), and the inclined surface (121) is inclined toward the edge of the gasket (12) in the direction from the gasket (12) to the plastic body (11).

6. The plastic part of the battery cell according to claim 5, characterized in that, The gasket (12) has a plane (122) formed away from the surface of the plastic body (11), the plane (122) is adjacent to the inclined surface (121) and located inside the inclined surface (121).

7. The plastic part of the battery cell according to claim 6, characterized in that, There are two inclined surfaces (121), which are opposite to each other and spaced apart, and the plane (122) is located between the two inclined surfaces (121).

8. The plastic part of the battery cell according to any one of claims 1-4, characterized in that, The gasket (12) and the plastic body (11) are integrally formed.

9. The plastic part of the battery cell according to any one of claims 1-4, characterized in that, The gasket (12) is made of plastic.

10. A single battery cell, characterized in that, Plastic part (10) including the battery cell (1) according to any one of claims 1-9.

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