Battery and electronic device

Abstract

The utility model relates to the technical field of lithium ion batteries, and discloses a battery and an electronic device, which comprise a battery cell and a packaging shell for accommodating the battery cell, the packaging shell comprises a main body used for accommodating a battery cell; the main body comprises two first side surfaces which are oppositely arranged along a first direction and two second side surfaces which are oppositely arranged along a third direction; the first sealing edge is connected to one end, in the first direction, of the main body; the first sealing edge is bent towards the adjacent first side surface and is attached to the first side surface; the two second sealing edges are connected to the two ends, in the third direction, of the main body respectively; the second sealing edge extends along the third direction and is vertical to the second side surface; wherein the first direction is perpendicular to the third direction. According to the battery and the electronic device disclosed by the utility model, the folded edge of the end part of the packaging shell is flattened, so that the battery space is saved, and the capacity and the performance of the battery are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion battery technical field, concretely relates to a battery and electronic device. BACKGROUND

[0002] At present, in order to meet the market demand of electronic device miniaturization, soft package lithium ion battery uses head edge folding technology to package the battery cell in order to save space. However, the head edge folding will produce two bending angles at one end of the battery cell height direction, and the two bending angles form two convex structures on the end face of one end of the battery cell height direction, which reduces the effective size of the battery in the height direction, loses the battery energy density, and is difficult to further improve the capacity and performance of the battery. SUMMARY

[0003] Therefore, the utility model provides a battery and electronic device to solve the problem that the existing head edge folding structure reduces the effective size of the battery in the height direction and loses the battery energy density.

[0004] In a first aspect, the utility model provides a battery, which comprises a battery cell and a packaging shell for accommodating the battery cell; the packaging shell comprises a main body for accommodating the battery cell; the main body comprises two first side surfaces oppositely arranged along a first direction and two second side surfaces oppositely arranged along a third direction; a first edge is connected to one end of the main body along the first direction; the first edge is bent towards the adjacent first side surface and is in close contact with the first side surface; two second edges are respectively connected to the two ends of the main body along the third direction; the second edge extends along the third direction and is perpendicular to the second side surface; wherein the first direction and the third direction are perpendicular to each other.

[0005] Optionally, the main body comprises two surfaces oppositely arranged along a second direction; the two second edges are located on the same side of the main body along the second direction; along the second direction, the second edge is located between the two surfaces and is flush with one of the surfaces; wherein the second direction is perpendicular to the first direction and the third direction.

[0006] Optionally, the first edge comprises a bent portion and a straight portion connected thereto; the bent portion is connected to the main body, and the straight portion is in close contact with the first side surface; the bent portion and the second edge are located on the same side of the main body along the second direction.

[0007] Optionally, the battery further comprises two adhesive members, and the two adhesive members are respectively adhered to the two second edges; along the second direction, the adhesive member is located on the side of the second edge away from the surface.

[0008] Optionally, the battery further comprises a protection plate, the protection plate is located at a side of the first sealing edge away from the first side face along the first direction; the battery cell comprises a tab, the tab is located in the first sealing edge and protrudes from the first sealing edge along the second direction, and the protection plate is connected with the tab; or the battery cell comprises a tab, the tab is located in the first sealing edge; the battery further comprises a connecting piece, the connecting piece is inserted into the first sealing edge and connected with the tab; and the protection plate is connected with the connecting piece.

[0009] Optionally, the battery further comprises a connector, the connector is located at a side of the protection plate away from the first sealing edge along the first direction and is electrically connected with the protection plate.

[0010] Optionally, the battery further comprises a plastic part, the plastic part covers the outer side of the protection plate and covers at least part of the structure of the package shell and the connector.

[0011] In a second aspect, the utility model also provides an electronic device, include: device body, be equipped with installation groove in device body, the battery as above, the battery is installed in the installation groove.

[0012] Optionally, the device body has two first edge portions, the two first edge portions are respectively formed as two first side walls oppositely arranged in the installation groove; the main body is embedded in the installation groove, and the two second side faces are respectively opposite to the two first side walls along a third direction; the two second sealing edges are respectively located at one side of the two first edge portions along the second direction; and the battery further comprises two adhesive parts, and the two second sealing edges are respectively adhered to the first edge portions through the two adhesive parts.

[0013] Optionally, the device body has a second edge portion connected between the two first edge portions and forming a second side wall in the installation groove; the first sealing edge is embedded in the installation groove and opposite to the second side wall along the first direction; wherein, the connection portions of the two first edge portions and the second edge portion are respectively provided with grooves in communication with the installation groove; and at least part of the structure of the two ends of the first sealing edge is located in the groove along the third direction.

[0014] By the technical scheme of the utility model, the first sealing edge of the package shell is located at one end of the main body along the first direction, and the first sealing edge is bent towards the adjacent first side face and is attached to the first side face; the two second sealing edges are located at the two ends of the main body along the third direction, the second sealing edges extend along the third direction and are perpendicular to the second side face. That is, the first sealing edge of the package shell is bent, and the second sealing edges on both sides of the first sealing edge are unfolded, so that the joint of the first sealing edge and the second sealing edge does not generate a bending angle, the end of the package shell along the first direction is flattened, the space of the battery in the height direction is saved, the space of the battery cell is fully utilized, the energy density of the battery is improved, and the capacity and performance of the battery are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 A structural diagram of a battery according to an embodiment of the present application;

[0017] Figure 2 An exploded view of a battery according to an embodiment of the present application;

[0018] Figure 3 A Figure 2 A local enlarged view of A in FIG. 4;

[0019] Figure 4 A local structural diagram of an electronic device according to an embodiment of the present application;

[0020] Figure 5 A Figure 4 A local enlarged view of B in FIG. 5;

[0021] Figure 6 An exploded view of another battery according to an embodiment of the present application.

[0022] Explanation of reference signs:

[0023] 1, battery; 11, packaging shell; 111, main body; 111a, surface; 111b, first side; 111c, second side; 112, first sealing edge; 1121, bending part; 1122, flat part; 113, second sealing edge; 12, battery cell; 121, tab; 13, bonding member; 14, protection plate; 15, connecting piece; 16, connector; 17, plastic member;

[0024] 2, device body; 21, mounting groove; 22, first edge part; 23, second edge part; 24, groove;

[0025] H, first direction; T, second direction; W, third direction. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] The embodiments of the utility model will be described below in combination with Figures 1 to 6

[0028] According to the embodiments of the utility model, on the one hand, a battery 1 is provided, which comprises a battery cell 12 and a packaging shell 11 for accommodating the battery cell 12. Wherein, the packaging shell 11 comprises a main body 111 for accommodating the battery cell 12, and a first sealing edge 112 and two second sealing edges 113 connected with the main body 111. Specifically, the main body 111 comprises two first side surfaces 111b oppositely arranged along a first direction H, two surfaces 111a oppositely arranged along a second direction T, and two second side surfaces 111c oppositely arranged along a third direction W. The first sealing edge 112 is connected to one end of the main body 111 along the first direction H, the first sealing edge 112 is bent towards the first side surface 111b and is fitted with the first side surface 111b to form a folded edge structure. The two second sealing edges 113 are respectively connected to the two ends of the main body 111 along the third direction W, the second sealing edges 113 extend along the third direction W and are perpendicular to the second side surface 111c.

[0029] Wherein, the first direction H, the second direction T and the third direction W are perpendicular to each other. In some cases, the first direction H can be the height direction of the battery 1, the second direction T can be the thickness direction of the battery 1, and the third direction W can be the width direction of the battery 1.

[0030] ​In this embodiment, the first edge 112 of the packaging shell 11 is located at one end of the main body 111 along the first direction H, and is bent towards the adjacent first side surface 111b and is flush with the first side surface 111b; the two second edges 113 are located at both ends of the main body 111 along the third direction W, and extend along the third direction W and are perpendicular to the second side surface 111c. That is, the first edge 112 is bent, and the second edges 113 on both sides of the first edge 112 are unfolded, and the joint of the first edge 112 and the second edge 113 does not form a bending angle, so that the end of the packaging shell 11 along the first direction H is flattened, saving the space of the battery 1 in the height direction, facilitating the full use of the space of the battery 1 by the battery cell 12, improving the energy density of the battery 1, and further improving the capacity and performance of the battery 1. In some embodiments, the main body 111, the first edge 112 and the second edge 113 of the packaging shell 11 are integrally formed. Specifically, the packaging shell 11 is formed by folding and packaging an aluminum plastic film, and in the folding and packaging process, the battery cell 12 is packaged in the packaging shell 11.

[0031] It can be understood that the main body 111 covers the outside of the battery cell 12, and the structure of the main body 111 matches the structure of the battery cell 12. Among them, the bending angle of the first edge 112 towards the first side surface 111b depends on the shape of the first side surface 111b. For example, as shown in Figure 3 , the first side surface 111b is a plane, and the first edge 112 is bent by 90° towards the first side surface 111b to be flush with the first side surface 111b.

[0032] For example, as shown in Figure 3 , the first edge 112 is bent by 90° towards the first side surface 111b and forms a connected bent portion 1121 and a flat portion 1122. The bent portion 1121 is arc-shaped and connected between the first edge 112 and the main body 111; the flat portion 1122 is located on one side of the first side surface 111b along the first direction H and is flush with the first side surface 111b. The two second edges 113 are connected to the two sides of the first edge 112 along the third direction W, specifically, the two second edges 113 are connected to the two sides of the bent portion 1121 along the third direction W and are unfolded on both sides of the main body 111. In this way, after the packaging shell is folded, the end of the battery 1 along the first direction X is flat without a bending angle, thereby saving the space of the battery 1 in the height direction and ensuring the flatness of the end of the battery 1.

[0033] In some embodiments, the two second edges 113 are located on the same side of the main body 111 along the second direction T. Along the second direction T, the second edge 113 is located between two surfaces and is flush with one of the surfaces, so that the battery 1 can be completely embedded in the mounting groove 21 of the electronic device during installation, avoiding waste of installation space.

[0034] Exemplarily, as shown in Figure 1 The main body 111 includes a first surface and a second surface oppositely arranged along the second direction T. Along the second direction T, the second sealing edge 113 is flush with the first surface, or the second sealing edge 113 is flush with the second surface.

[0035] In some embodiments, the first sealing edge 112 includes the above-mentioned connected bending part 1121 and flat part 1122. The bending part 1121 is connected with the main body 111, and the flat part 1122 is fitted with the first side surface 111b. The bending part 1121 of the first sealing edge 112 is located on the same side of the main body 111 as the second sealing edge 113 along the second direction T. Generally, the first sealing edge 112 and the second sealing edge 113 are both formed by folding and packaging the aluminum plastic film. The bending part 1121 of the first sealing edge 112 is located on the same side of the main body 111 as the second sealing edge 113, which facilitates the realization of the packaging process and is beneficial to the flattening of the end of the battery 1.

[0036] It should be noted that after the first sealing edge 112 is folded towards the first side surface 111b and fitted with the first side surface 111b, the first sealing edge 112 extends between the two surfaces 111a, that is, the first sealing edge 112 extends in the second direction T.

[0037] In some embodiments, the first sealing edge 112 extends in the second direction T by 1-10 mm, preferably 1-5 mm, to avoid leakage of electrolyte.

[0038] In some embodiments, along the third direction W, the two ends of the first sealing edge 112 protrude from the main body 111, and the length of the two ends of the first sealing edge 112 protruding from the main body 111 is 1-10 mm, preferably 1-5 mm. Generally, the mounting groove 21 of the electronic device is provided with a recess 24, and the two ends of the first sealing edge 112 are inserted into the recess 24. The length of the two ends of the first sealing edge 112 protruding from the main body 111 in this range can avoid the length of the recess 24 being too long, thereby ensuring the structural strength of the electronic device structure.

[0039] It can be understood that the two second sealing edges 113 are connected to the two sides of the first sealing edge 112 along the third direction W. Generally, the length of the first sealing edge 112 protruding from the main body 111 and the extension length of the second sealing edge 113 in the third direction W are equal, that is, the extension length of the second sealing edge 113 in the third direction W is 1-10 mm, preferably 1-5 mm.

[0040] In some embodiments, the battery 1 further comprises two adhesive members 13, which are respectively adhered to the two second sealing edges 113 and are located on the side of the second sealing edges 113 away from the surface 111a along the second direction T. When the battery 1 is installed in an electronic device, the second sealing edges 113 can be adhered to the electronic device through the adhesive members 13, facilitating the assembly and disassembly of the battery 1, and the second sealing edges 113 do not occupy the installation space of the battery 1, ensuring the capacity and performance of the battery 1.

[0041] Exemplarily, the adhesive member 13 can have a strip-shaped structure or a point-shaped structure, etc. Exemplarily, the adhesive member 13 can be a double-sided adhesive tape, such as a strip-shaped double-sided adhesive tape, a point-shaped double-sided adhesive tape, etc.

[0042] In some embodiments, the battery 1 further comprises a protection plate 14 for protection of the battery 1 and communication of the mobile phone charging and discharging protocol. Along the first direction H, the protection plate 14 is located on the side of the first sealing edge 112 away from the battery cell 12, specifically, on the side of the first sealing edge 112 away from the first side surface 111b.

[0043] In some embodiments, the battery cell 12 comprises a tab 121 located in the first sealing edge 112. As shown in Figure 2 and 3 The battery 1 further comprises a connecting sheet 15 inserted into the first sealing edge 112 to be connected with the tab 121 located in the first sealing edge 112; the protection plate 14 is connected with the connecting sheet 15, thereby realizing the electrical connection with the tab 121 through the connecting sheet 15. Exemplarily, the connecting sheet 15 can be a nickel sheet. Exemplarily, the connecting sheet 15 has a U-shaped structure, one side of the U-shaped structure is inserted into the first sealing edge 112 and connected with the tab 121, and the other side is connected with the protection plate 14.

[0044] In some embodiments, as shown in Figure 6 The battery cell 12 comprises a tab 121 located in the first sealing edge 112, and the tab 121 protrudes from the first sealing edge 112 along the second direction T. The protection plate 14 is directly connected with the tab, or is connected with the tab through the connecting sheet 15. Exemplarily, along the first direction H, the first sealing edge 112 has an outer side surface away from the first side surface 111b, and the part of the tab 121 protruding from the first sealing edge 112 can be folded towards the outer side surface and parallel or attached to the outer side surface, so as to be connected with the protection plate 14 or the connecting sheet 15.

[0045] It can be understood that the tab 121 of the battery cell comprises a positive electrode tab and a negative electrode tab, and correspondingly, two connecting sheets 15 are provided, which are respectively arranged corresponding to the positive electrode tab and the negative electrode tab and are connected.

[0046] In the scheme, the first sealing edge 112 is folded, and the second sealing edge 113 is unfolded, so that the end of the packaging shell 11 is flat, that is, the mounting space of the protection plate 14 is more neat, and the protection plate 14 is installed above the first sealing edge 112, which is easy to assemble.

[0047] In some embodiments, the battery 1 further comprises a connector 16 for connecting the main board of the electronic device and the protection plate 14. The connector 16 is located on the side of the protection plate 14 away from the first sealing edge 112 in the first direction H and is electrically connected to the protection plate 14.

[0048] In some embodiments, the battery 1 further comprises a plastic part 17 wrapped on the outer side of the protection plate 14, and the plastic part 17 covers at least part of the structure of the packaging shell 11 and the connector 16 to connect the connector 16, the protection plate 14 and the battery cell 12 as a whole structure, and the plastic part 17 can also protect the components on the protection plate 14. Exemplarily, the plastic part 17 can be an injection molding part formed by low-pressure injection molding. Exemplarily, the plastic part 17 can also be a plastic paper.

[0049] In some embodiments, high-temperature adhesive paper can be attached to the outer side of the connector 16 and the protection plate 14 at the end of the battery 1 in the first direction H to achieve insulation protection.

[0050] The specific assembly process of the battery 1 of the utility model is as follows: the battery 1 is packaged in the guarantee packaging shell 11; the first sealing edge 112 of the packaging shell 11 is folded by 90 degrees, and the second sealing edge 113 remains unfolded; the protection plate 14 and the connector 16 are electrically connected to the battery cell 12; the end of the battery 1 where the protection plate 14 and the connector 16 are mounted is subjected to low-pressure injection molding to form a plastic part 17; high-temperature adhesive paper is attached to the area requiring insulation at the end of the battery 1.

[0051] According to the embodiments of the utility model, on the other hand, an electronic device is also provided, which comprises a device body 2 and a battery 1 as described in the above embodiments. The device body 2 is provided with a mounting groove 21, and the battery 1 is mounted in the mounting groove 21. Since the electronic device of the utility model comprises the above-mentioned battery 1, it has the same technical effects as the battery 1 of the utility model, which will not be repeated here.

[0052] Specifically, in some embodiments, as shown in Figure 4 The device body 2 has two first edge portions 22, and the two first edge portions 22 respectively form two first side walls oppositely arranged in the mounting groove 21. The main body 111 is embedded in the mounting groove 21, and the two second side surfaces 111c are respectively opposite to the two first side walls in the third direction W. The two second sealing edges 113 are located outside the mounting groove 21 and are respectively located on one side of the two first edge portions 22 in the second direction T.

[0053] Further, the battery 1 further comprises two adhesive pieces 13, which are respectively adhered to the two second sealing edges 113. The two second sealing edges 113 are respectively adhered to the first edge portion 22 through the two adhesive pieces 13. In the electronic device of the present application, when the battery 1 is placed in the mounting groove 21, the second sealing edges 113 on both sides of the battery 1 can play a positioning role in the mounting of the battery 1, and the battery 1 is fixed to the first edge portion 22 through the adhesive pieces 13 on the second sealing edges 113, so as to realize the mounting of the battery 1; when disassembled, the adhesive pieces 13 are taken from the side, and the battery 1 can be taken out, which meets the requirement of quickly disassembling the battery 1 and is beneficial to disassembly and maintenance.

[0054] Exemplarily, the adhesive piece 13 can be in a strip-shaped structure or a point-shaped structure, etc. Exemplarily, the adhesive piece 13 can be double-sided tape, such as a strip-shaped double-sided tape, point adhesive, etc.

[0055] In some embodiments, as shown in Figs. 1 and 2, the device body 2 has a first edge portion 22, which is connected between the two second edge portions 23 and forms a first side wall in the mounting groove 21. The first sealing edge 112 is embedded in the mounting groove 21 and is opposite to the first side wall along a first direction H. The first sealing edge 112 is adhered to the first side wall through the adhesive piece 12. Figure 4 and 5 As shown, the device body 2 has a second edge portion 23, which is connected between the two first edge portions 22 and forms a second side wall in the mounting groove 21. The first sealing edge 112 is embedded in the mounting groove 21 and is opposite to the second side wall along a first direction H. The connection portions of the two first edge portions 22 and the second edge portion 23 are respectively provided with a groove 24, which is communicated with the mounting groove 21; at least part of the structure at both ends of the first sealing edge 112 is located in the groove 24 along a third direction W. The groove 24 reserved for the first sealing edge 112 in the mounting groove 21 reduces the machining process of the packaging shell 11, thereby simplifying the production process of the battery 1, improving the production efficiency, and reducing the production cost.

[0056] It can be understood that the electronic device of the present application includes but is not limited to a mobile phone, an electronic watch, a tablet, etc.

[0057] The battery 1 and the electronic device of the present application make the end portion of the packaging shell 11 along the height direction flat and free of sharp corners by folding the first sealing edge 112 of the packaging shell 11 and unfolding the second sealing edge 113, the height of the battery 1 is determined by the height of the battery cell 12 and the thickness of the protection plate 14, the influence of the boundary sealing edge of the packaging shell 11 is reduced, the waste of the space of the battery 1 is reduced, and the capacity and performance of the battery 1 are ensured. At the same time, the adhesive piece 13 is provided on the second sealing edge 113, which is convenient for the assembly and disassembly of the battery 1 on the electronic device, and the second sealing edge 113 does not occupy the mounting space of the battery 1, thereby further ensuring the capacity and performance of the battery 1.

[0058] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the appended claims.

Claims

1. A battery, characterized in that, include: The battery cell (12) and a packaging shell (11) for housing the battery cell (12); the packaging shell (11) includes: A main body (111) for accommodating the battery cell (12); the main body (111) includes two first side surfaces (111b) disposed opposite each other along a first direction (H), and two second side surfaces (111c) disposed opposite each other along a third direction (W); A first sealing edge (112) is connected to one end of the main body (111) along the first direction (H); and the first sealing edge (112) bends toward the adjacent first side surface (111b) and fits against the first side surface (111b); Two second sealing edges (113) are respectively connected to the two ends of the main body (111) along the third direction (W); the second sealing edges (113) extend along the third direction (W) and are perpendicular to the second side surface (111c); Among them, the first direction (H) is perpendicular to the third direction (W).

2. The battery according to claim 1, characterized in that, The main body (111) includes two surfaces (111a) disposed opposite each other along a second direction (T); The two second sealing edges (113) are located on the same side of the body (111) along the second direction (T); along the second direction (T), the second sealing edges (113) are located between the two surfaces (111a) and are flush with one of the surfaces (111a); Among them, the second direction (T) is perpendicular to the first direction (H) and the third direction (W).

3. The battery according to claim 2, characterized in that, The first edge sealing (112) includes a bent portion (1121) and a straight portion (1122) connected together; the bent portion (1121) is connected to the main body (111), and the straight portion (1122) is in contact with the first side surface (111b); The bent portion (1121) and the second sealing edge (113) are located on the same side of the main body (111) along the second direction (T).

4. The battery according to claim 2, characterized in that, The battery (1) further includes two adhesive members (13), which are respectively bonded to two second sealing edges (113); along the second direction (T), the adhesive members (13) are located on the side of the second sealing edge (113) away from the surface (111a).

5. The battery according to any one of claims 1-4, characterized in that, The battery (1) also includes a protection plate (14) along the first direction (H), the protection plate (14) being located on the side of the first sealing edge (112) away from the first side surface (111b); The battery cell (12) includes a tab (121) located inside the first sealing edge (112) and protruding from the first sealing edge (112) along the second direction (T); the protective plate (14) is connected to the tab (121); or; The battery cell (12) includes a tab (121) located inside the first sealing edge (112); the battery (1) also includes a connecting piece (15) inserted into the first sealing edge (112) and connected to the tab (121); the protection plate (14) is connected to the connecting piece (15).

6. The battery according to claim 5, characterized in that, The battery (1) further includes a connector (16) along a first direction (H), the connector (16) being located on the side of the protection plate (14) away from the first sealing edge (112) and electrically connected to the protection plate (14).

7. The battery according to claim 6, characterized in that, The battery (1) also includes a plastic component (17) which covers the outside of the protective plate (14) and covers at least a portion of the structure of the packaging shell (11) and the connector (16).

8. An electronic device, characterized in that, include: The device body (2) has a mounting groove (21) inside. The battery (1) as described in any one of claims 1-7 is installed in the mounting slot (21).

9. The electronic device according to claim 8, characterized in that, The device body (2) has two first edge portions (22), which respectively form two first sidewalls disposed opposite to each other in the mounting groove (21); the main body (111) is embedded in the mounting groove (21), and along the third direction (W), the two second side surfaces (111c) are respectively opposite to the two first sidewalls; the two second sealing edges (113) are located outside the mounting groove (21) and are respectively located on one side of the two first edge portions (22) along the second direction (T); The battery (1) also includes two adhesive members (13), and the two second sealing edges (113) are respectively bonded to the first edge portion (22) by the two adhesive members (13).

10. The electronic device according to claim 9, characterized in that, The device body (2) has a second edge portion (23), which is connected between two first edge portions (22) and forms a second sidewall in the mounting groove (21); the first sealing edge (112) is embedded in the mounting groove (21) and is opposite to the second sidewall along the first direction (H); Among them, a groove (24) is provided at the connection between the two first edge portions (22) and the second edge portion (23), and the groove (24) is connected to the mounting groove (21); along the third direction (W), at least a portion of the structure at both ends of the first sealing edge (112) is located in the groove (24).

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