Top cover and battery

Abstract

The utility model provides a top cover which is used for being connected with a shell of a battery. The top cover comprises a first cover piece and two pole assemblies. The first cover piece is provided with a first side and a second side which are opposite. The first side is configured to connect with the housing. The first cover piece is provided with two pole assembling holes. And each pole assembly hole penetrates through the first side and the second side. And each pole assembly is arranged in one pole assembly hole. Each pole assembly is connected to the first side. The first cover member can stop the pole assembly in a direction from the first side to the second side. One of the two pole assemblies is configured to be electrically connected with a positive electrode of a battery cell of the battery, and the other pole assembly is configured to be electrically connected with a negative electrode of the battery cell. According to the top cover and the battery provided by the invention, the assembly firmness and the structural stability of the pole assembly of the top cover can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a top cover and a battery. Background Art

[0002] The battery cell is installed in the shell, and the top cover of the battery is installed on the shell to prevent the battery cell from being separated from the shell. At the same time, the positive and negative electrodes of the battery cell need to be connected to external devices through the poles of the top cover. However, in the related art, the poles of the top cover have poor assembly firmness and unstable structure, which can easily cause battery failure and danger. Utility Model Content

[0003] In view of this, the present application provides a top cover and a battery to improve the assembly firmness and structural stability of the pole assembly of the top cover.

[0004] One embodiment of the present application provides a top cover for connecting to a battery housing. The top cover includes a first cover member and two pole assemblies. The first cover member has a first side and a second side opposite to each other. The first side is configured to be connected to the housing. The first cover member is provided with two pole assembly holes. Each pole assembly hole passes through the first side and the second side. Each pole assembly is provided in a pole assembly hole. Each pole assembly is connected to the first side. The first cover member is capable of stopping the pole assembly in a direction from the first side to the second side. One of the two pole assemblies is configured to be electrically connected to the positive pole of the battery cell, and the other is configured to be electrically connected to the negative pole of the battery cell.

[0005] In the above embodiment, the first side of the first cover is connected to the shell to encapsulate the battery cell in the shell. Two pole assemblies are arranged on the first cover and are electrically connected to the positive and negative electrodes of the battery cell respectively. By setting the pole assembly hole, it is convenient for the pole assembly to pass through the first cover to realize the electrical connection between the battery cell and the external device. The pole assembly is connected to the first side. When the pole assembly has a tendency to move from the first side to the second side, the first cover can stop the pole assembly through the limitation of its own structure, thereby reducing the possibility of the pole assembly being pushed away from the first cover by air pressure, so as to improve the assembly stability of the pole assembly. And the connection structure between the pole assembly and the first cover is on the first side, which is conducive to reducing the possibility of removing the pole assembly from the outside of the battery after the top cover is assembled to the shell. At the same time, the first cover can cover part of the structure of the pole assembly to protect the pole assembly, which is conducive to improving the structural stability of the pole assembly.

[0006] In some embodiments of the present application, each pole assembly includes a pole piece, a connecting piece, a first insulating piece, and a second insulating piece. The pole piece is configured to be electrically connected to the positive or negative pole of the battery cell. The pole piece is inserted into the pole assembly hole. The connecting piece is connected to the first side. The first cover piece can stop the connecting piece in the direction from the first side to the second side. The pole piece and the connecting piece are respectively connected to the first insulating piece. The first insulating piece separates the pole piece from the connecting piece. The second insulating piece is connected to the pole piece. The second insulating piece separates the pole piece from the hole wall of the pole assembly hole.

[0007] In the above embodiment, the pole piece realizes the electrical connection between the battery cell and the external device, and the pole piece is assembled to the first cover piece through the connecting piece. By setting the first insulating piece, the connection between the pole piece and the connecting piece can be realized, and the pole piece and the connecting piece can be insulated from each other, and the insulation effect between the pole piece and the first cover piece can be further improved, thereby improving the safety of the top cover and the battery, which is beneficial to improving the structural stability of the pole assembly and facilitating the assembly of the pole assembly. By setting the second insulating piece, the pole piece and the structure at the pole assembly hole of the first cover piece are insulated from each other to improve the insulation effect between the pole piece and the first cover piece, thereby improving the safety of the top cover and the battery. By setting the first insulating piece and the second insulating piece, when the pole assembly is assembled to the first cover piece, the difficulty of positioning the relative position between the pole piece and the first cover piece is reduced, thereby reducing the production difficulty and helping to improve production efficiency.

[0008] In some embodiments of the present application, the connecting member is provided with a first positioning portion, and the first insulating member and the first positioning portion are matched with each other in a concave-convex manner. The pole member is provided with a second positioning portion, and the second insulating member and the second positioning portion are matched with each other in a concave-convex manner.

[0009] In the above embodiment, by providing the first positioning portion, at least part of the structure between the first insulating member and the connecting member can be interlocked with each other, so as to reduce the possibility of the first insulating member loosening or falling off, which is conducive to improving the connection stability between the first insulating member and the connecting member. By providing the second positioning portion, at least part of the structure between the second insulating member and the pole member can be interlocked with each other, so as to reduce the possibility of the second insulating member loosening or falling off, which is conducive to improving the connection stability between the second insulating member and the pole member. Thereby, the structural stability of the pole assembly is improved, and the safety of the battery is improved.

[0010] In some embodiments of the present application, the pole piece is located on a side of the connecting piece facing the first side. The first insulating piece includes a first insulating portion and a second insulating portion connected to each other. The first insulating portion is located on a side of the connecting piece facing the first side. The second insulating portion is located on a side of the connecting piece facing away from the first side. The first insulating portion and the second insulating portion clamp the connecting piece. A portion of the first insulating portion extends to a side of the pole piece facing the first side. A portion of the first insulating portion extends to a side of the pole piece facing away from the first side. The first insulating portion clamps the pole piece.

[0011] In the above embodiment, the first insulating part and the second insulating part connected to each other are respectively located on opposite sides of the connecting member, so that the first insulating part clamps the connecting member to achieve the connection between the first insulating part and the connecting member, and the connection stability between the first insulating part and the connecting member is improved through the clamping connection. The first insulating part clamps the pole member to achieve the connection between the first insulating part and the connecting member, and the connection stability between the first insulating part and the connecting member is improved through the clamping connection.

[0012] In some embodiments of the present application, the top cover further comprises two seals. A seal is provided between each pole assembly and the first side. Each seal is arranged around the outer periphery of the pole assembly hole on the first side.

[0013] In the above embodiment, by providing a sealing member, the possibility of air leakage between the pole assembly and the first cover through the pole assembly hole is reduced, thereby improving the air tightness of the top cover.

[0014] In some embodiments of the present application, the pole assembly is provided with a sealing assembly groove, and the sealing member is located in the sealing assembly groove.

[0015] In the above embodiment, by providing the sealing assembly groove, it is convenient to position the sealing member and the pole assembly relative to each other when the sealing member and the pole assembly are assembled, and it is also convenient to maintain the relative position of the sealing member and the pole assembly stable when the pole assembly and the first cover are assembled. This is conducive to improving the accuracy of the sealing member setting position and improving the airtightness of the top cover.

[0016] In some embodiments of the present application, the first cover is provided with two pole assembly slots. Each pole assembly slot is provided on the first side. Each pole assembly hole is provided in a pole assembly slot. Each pole assembly is connected to a pole assembly slot.

[0017] In the above embodiment, by providing the pole assembly groove, it is convenient to locate the relative position of the pole assembly and the first cover, and the pole assembly can be connected to the first side of the first cover to improve the assembly stability of the pole assembly. In addition, by providing the pole assembly groove, when the pole assembly and the first cover are fixedly connected by welding, melting, bonding, etc., it is convenient to maintain the relative position of the pole assembly, and it is helpful to reduce the impact on other parts of the first cover.

[0018] In some embodiments of the present application, the first cover is further provided with an explosion-proof assembly groove and an explosion-proof assembly hole. The explosion-proof assembly groove is provided on the first side. The explosion-proof assembly hole runs through the first side and the second side and is provided in the explosion-proof assembly groove. The top cover further includes an explosion-proof valve. The explosion-proof valve is connected to the explosion-proof assembly groove. The explosion-proof valve is connected to the second side through the explosion-proof assembly hole.

[0019] In the above embodiment, the explosion-proof valve is connected to the outside of the battery through the explosion-proof assembly hole. The explosion-proof valve can avoid thermal runaway of the battery to improve the safety of the battery. By providing an explosion-proof assembly groove, it is convenient to locate the relative position of the explosion-proof valve and the first cover member, so as to facilitate the assembly of the explosion-proof valve. The explosion-proof assembly groove is provided on the first side, and the explosion-proof valve and the pole assembly can be assembled to the first cover member together without flipping the first cover member, which simplifies the production process and is conducive to improving the product quality and production efficiency.

[0020] In some embodiments of the present application, the top cover further includes a second cover member. The second cover member is disposed on the first side. The second cover member covers a portion of the structure of each pole assembly along a direction from the first side to the second side.

[0021] In the above embodiment, the second cover can stop the side of the pole assembly away from the first cover to reduce the possibility of the pole assembly detaching from the first cover in the direction from the second side to the first side. The second cover cooperates with the first cover to fix the pole assembly, improves the assembly stability of the pole assembly, and is conducive to improving the safety of the top cover and the battery.

[0022] An embodiment of the present application provides a battery. The battery includes a housing, a battery cell, and a top cover as described in any of the above embodiments. The battery cell is disposed in the housing. A first side of a first cover is connected to the housing. A pole assembly is connected to a positive electrode of the battery cell. Another pole assembly is connected to a negative electrode of the battery cell.

[0023] In the above embodiment, the first cover is connected to the shell to encapsulate the battery cell in the shell. The two pole assemblies respectively realize the electrical connection between the positive and negative poles of the battery cell and the external device through the pole assembly holes. The pole assembly is connected to the first side, and the first cover can stop the pole assembly from moving in the direction from the first side to the second side through the limitation of its own structure, thereby improving the assembly stability between the pole assembly and the first cover. In addition, the first cover can cover part of the structure of the pole assembly, protect the pole assembly, and help improve the structural stability of the pole assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope.

[0025] Figure 1 A schematic diagram of the structure of a battery provided in one embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the middle top cover;

[0027] Figure 3 for Figure 2Explosion diagram of the middle top cover;

[0028] Figure 4 for Figure 2 A schematic structural diagram of the first cover member from another perspective;

[0029] Figure 5 for Figure 2 Exploded diagram of the center pole assembly;

[0030] Figure 6 for Figure 2 Schematic diagram of a partial cross-section of section AA.

[0031] Description of main component symbols:

[0032] 100, top cover; 1, first cover; 11, first side; 12, second side; 13, pole assembly hole; 14, pole assembly groove; 15, explosion-proof assembly groove; 16, explosion-proof assembly hole; 17, membrane assembly groove; 18, injection hole; 19, connection hole; 2, pole assembly; 21, pole piece; 211, column section; 2111, second positioning part; 212, sheet section; 2121, insulation assembly groove; 22, connection piece; 221, sealing assembly groove; 222, first positioning part; 23, first insulating piece; 231, first insulating part; 232, second insulating part; 24, second insulating piece; 3, sealing piece; 4, explosion-proof valve; 5, protective film; 6, second cover; 61, avoidance hole; 200, battery; 201, shell. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0036] An embodiment of the present application provides an embodiment of the present application that provides a top cover and a battery. The top cover is used to connect to the shell of the battery. The top cover includes a first cover member and two pole assemblies. The first cover member has a first side and a second side opposite to each other. The first side is configured to be connected to the shell. The first cover member is provided with two pole assembly holes. Each pole assembly hole passes through the first side and the second side. Each pole assembly is provided in a pole assembly hole. Each pole assembly is connected to the first side. The first cover member can stop the pole assembly in the direction from the first side to the second side. One of the two pole assemblies is configured to be electrically connected to the positive pole of the battery cell, and the other is configured to be electrically connected to the negative pole of the battery cell.

[0037] The first side of the first cover is connected to the shell to encapsulate the battery cell in the shell. Two pole assemblies are arranged on the first cover and are electrically connected to the positive and negative electrodes of the battery cell respectively. By setting the pole assembly hole, it is convenient for the pole assembly to pass through the first cover to realize the electrical connection between the battery cell and the external device. The pole assembly is connected to the first side. When the pole assembly has a tendency to move from the first side to the second side, the first cover can stop the pole assembly through the limitation of its own structure, thereby reducing the possibility of the pole assembly being pushed away from the first cover by air pressure, so as to improve the assembly stability of the pole assembly. And the connection structure between the pole assembly and the first cover is on the first side, which is conducive to reducing the possibility of removing the pole assembly from the outside of the battery after the top cover is assembled to the shell. At the same time, the first cover can cover part of the structure of the pole assembly to protect the pole assembly, which is conducive to improving the structural stability of the pole assembly.

[0038] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] See also Figure 1 One embodiment of the present application provides a battery 200. The battery 200 includes a shell 201, a battery cell (not shown) and a top cover 100. The battery cell is disposed in the shell 201. The top cover 100 is connected to the shell 201. The battery cell is encapsulated in the shell 201. The battery cell is electrically connected to the top cover 100, and the battery cell is electrically connected to an external device through the top cover 100.

[0040] In some embodiments, the battery 200 may be a power battery or an energy storage battery.

[0041] In some embodiments, the battery cell is a solid structure or a liquid structure. For example, an electrolyte can be used as a liquid structure battery cell.

[0042] See also Figure 2 and Figure 3In some embodiments, the top cover 100 includes a first cover member 1 and two pole assemblies 2. The first cover member 1 has a first side 11 and a second side 12 opposite to each other. The first side 11 is configured to be connected to the housing 201. The first cover member 1 is provided with two pole assembly holes 13. Each pole assembly hole 13 passes through the first side 11 and the second side 12. Each pole assembly 2 is provided in one pole assembly hole 13. Each pole assembly 2 is connected to the first side 11. The first cover member 1 is capable of stopping the pole assembly 2 in the direction from the first side 11 to the second side 12. One of the two pole assemblies 2 is configured to be electrically connected to the positive electrode of the battery cell of the battery 200, and the other is configured to be electrically connected to the negative electrode of the battery cell.

[0043] The first side 11 of the first cover 1 is connected to the housing 201 to encapsulate the battery cell in the housing 201. Two pole assemblies 2 are provided on the first cover 1 and are electrically connected to the positive and negative electrodes of the battery cell respectively. The pole assembly holes 13 are provided to facilitate the pole assembly 2 to pass through the first cover 1 to realize the electrical connection between the battery cell and the external device. The pole assembly 2 is connected to the first side 11. When the pole assembly 2 has a tendency to move from the first side 11 to the second side 12, the first cover 1 can stop the pole assembly 2 by limiting its own structure, thereby reducing the possibility of the pole assembly 2 being pushed away from the first cover 1 by air pressure, so as to improve the assembly stability of the pole assembly 2. In addition, the connection structure between the pole assembly 2 and the first cover 1 is on the first side 11, which is conducive to reducing the possibility of removing the pole assembly 2 from the outside of the battery 200 after the top cover 100 is assembled to the housing 201. At the same time, the first cover 1 can cover part of the structure of the pole assembly 2 to protect the pole assembly 2, thereby facilitating the improvement of the structural stability of the pole assembly 2.

[0044] It is understandable that in some embodiments, more than two pole assemblies 2 may be provided, which is beneficial to provide various connection modes for the battery 200. The number of the pole assembly holes 13 is the same as the number of the pole assemblies 2.

[0045] See also Figure 2 and Figure 4 In some embodiments, the first cover 1 is an integrally formed structure, so as to improve the airtightness of the battery 200 after the first cover 1 is connected to the housing 201. As an exemplary example, the first cover 1 is plate-shaped.

[0046] In some embodiments, the first cover 1 is made of metal, which is beneficial to improving the structural strength of the top cover 100 and thus improving the structural strength of the battery 200 .

[0047] See also Figure 3 In some embodiments, the top cover 100 further includes two seals 3. A seal 3 is provided between each pole assembly 2 and the first side 11. Each seal 3 is provided around the outer periphery of the pole assembly hole 13 of the first side 11.

[0048] By providing the sealing member 3 , the possibility of air leakage between the pole assembly 2 and the first cover member 1 through the pole assembly hole 13 is reduced, thereby improving the air tightness of the top cover 100 .

[0049] It is understandable that in some embodiments, more than two seals 3 may be provided, and multiple seals 3 may be provided between each pole assembly 2 and the first side 11 to further improve the airtightness of the top cover 100 .

[0050] As an illustrative example, the sealing member 3 includes but is not limited to a rubber ring.

[0051] See also Figure 3 and Figure 5 In some embodiments, a sealing assembly groove 221 is provided on one side of the pole assembly 2 facing the first side 11. The sealing member 3 is located in the sealing assembly groove 221. By providing the sealing assembly groove 221, it is convenient to position the sealing member 3 and the pole assembly 2 relative to each other when the sealing member 3 and the pole assembly 2 are assembled, and it is also convenient to maintain the relative position of the sealing member 3 and the pole assembly 2 stable when the pole assembly 2 and the first cover 1 are assembled. This is conducive to improving the accuracy of the setting position of the sealing member 3, so as to improve the airtightness of the top cover 100.

[0052] See also Figure 5 In some embodiments, the pole assembly 2 is recessed in the direction from the second side 12 to the first side 11 to form a sealing assembly groove 221. Each sealing assembly groove 221 is arranged around the outer periphery of a pole assembly hole 13. As an exemplary example, the projection of the sealing assembly groove 221 in the direction from the second side 12 to the first side 11 includes but is not limited to a circular ring, a square ring, and other shapes of rings.

[0053] See also Figure 4 and Figure 6 In some embodiments, the first cover 1 is provided with two pole assembly grooves 14. Each pole assembly groove 14 is provided on the first side 11. Each pole assembly hole 13 is provided in one pole assembly groove 14. Each pole assembly 2 is connected to one pole assembly groove 14.

[0054] By providing the pole assembly groove 14, it is convenient to locate the relative position of the pole assembly 2 and the first cover 1, and the pole assembly 2 can be connected to the first side 11 of the first cover 1, so as to improve the assembly stability of the pole assembly 2. In addition, by providing the pole assembly groove 14, when the pole assembly 2 and the first cover 1 are fixedly connected by welding, melting, bonding, etc., it is convenient to maintain the relative position of the pole assembly 2, and it is helpful to reduce the impact on other parts of the first cover 1.

[0055] See also Figure 3 and Figure 6It can be understood that in some embodiments, each seal 3 is disposed between a pole assembly groove 14 and a seal assembly groove 221. In the direction from the first side 11 to the second side 12, the projection of the pole assembly groove 14 at the corresponding position can cover the projection of the seal assembly groove 221, so that the pole assembly 2 can cooperate with the first cover 1 to restrict the corresponding seal 3 in the pole assembly groove 14 and the seal assembly groove 221.

[0056] See also Figure 3 , Figure 4 and Figure 6 In some embodiments, the pole assembly groove 14 is formed by stamping from the first side 11 to the second side 12. Compared with milling, stamping has low production cost and high production speed. Compared with forging, stamping reduces the possibility of deformation of the first cover 1 to improve the flatness of the first cover 1, thereby improving the airtightness after the top cover 100 is connected to the housing 201.

[0057] See also Figures 2 to 4 In some embodiments, the first cover member 1 is further provided with an explosion-proof assembly groove 15 and an explosion-proof assembly hole 16. The explosion-proof assembly groove 15 is provided at the first side 11. The explosion-proof assembly hole 16 penetrates the first side 11 and the second side 12 and is provided in the explosion-proof assembly groove 15. The top cover 100 further includes an explosion-proof valve 4. The explosion-proof valve 4 is connected to the explosion-proof assembly groove 15. The explosion-proof valve 4 is communicated with the second side 12 through the explosion-proof assembly hole 16.

[0058] The explosion-proof valve 4 is connected to the outside of the battery 200 through the explosion-proof assembly hole 16. The explosion-proof valve 4 can prevent thermal runaway of the battery 200 to improve the safety of the battery 200. The explosion-proof assembly groove 15 is provided to facilitate positioning of the relative position of the explosion-proof valve 4 and the first cover 1, so as to facilitate assembly of the explosion-proof valve 4. The explosion-proof assembly groove 15 is provided on the first side 11, and the explosion-proof valve 4 and the pole assembly 2 can be assembled to the first cover 1 together without turning over the first cover 1, which simplifies the production process and is conducive to improving the product quality and production efficiency.

[0059] See also Figures 2 to 4 In some embodiments, the first cover member 1 is further provided with a membrane assembly groove 17. The membrane assembly groove 17 is provided at the second side 12. The explosion-proof assembly hole 16 is provided in the membrane assembly groove 17. The top cover 100 further includes a protective film 5. The protective film 5 is provided in the membrane assembly groove 17. The protective film 5 can protect the explosion-proof valve 4 to reduce the damage of the explosion-proof valve 4 from the outside.

[0060] See also Figures 2 to 4 In some embodiments, the first cover member 1 is provided with a liquid injection hole 18. The liquid injection hole 18 passes through the first side 11 and the second side 12. After the top cover 100 is connected to the housing 201, liquid can be injected into the housing 201 through the liquid injection hole 18.

[0061] See also Figure 2 and Figure 3 In some embodiments, the top cover 100 further includes a second cover member 6. The second cover member 6 is disposed on the first side 11. The second cover member 6 covers a portion of the structure of each pole assembly 2 along a direction from the first side 11 to the second side 12. The second cover member 6 covers a portion of the structure of the explosion-proof valve 4 along a direction from the first side 11 to the second side 12.

[0062] The second cover 6 can stop the side of the pole assembly 2 away from the first cover 1, so as to reduce the possibility of the pole assembly 2 being separated from the first cover 1 in the direction from the second side 12 to the first side 11. The second cover 6 cooperates with the first cover 1 to fix the pole assembly 2, improves the assembly stability of the pole assembly 2, and is conducive to improving the safety of the top cover 100 and the battery 200.

[0063] See also Figure 3 In some embodiments, the second cover 6 is provided with a plurality of avoidance holes 61. The avoidance holes 61 are provided correspondingly to the positions of the pole assembly 2, the explosion-proof valve 4 and the injection hole 18.

[0064] See also Figure 4 In some embodiments, the first cover member 1 is provided with a connection hole 19. A plurality of connection holes 19 are provided. The plurality of connection holes 19 are all provided on the first side 11, and the second cover member 6 is connected to the connection holes 19 so that the second cover member 6 is connected to the first cover member 1. The plurality of connection holes 19 are all blind holes to avoid reducing the airtightness of the top cover 100.

[0065] See also Figure 2 and Figure 3 In some embodiments, the second cover 6 is a split-molded structure. The split structure can reduce the possibility of the second cover 6 pulling the first cover 1 to deform. In other embodiments, the second cover 6 is an integrally molded structure. As an exemplary example, the second cover 6 is plate-shaped.

[0066] In some embodiments, the second cover member 6 is made of plastic, which is helpful to reduce the weight of the top cover 100 .

[0067] See also Figure 3 and Figure 5In some embodiments, each pole assembly 2 includes a pole piece 21, a connector 22, a first insulating piece 23 and a second insulating piece 24. The pole piece 21 is configured to be electrically connected to the positive or negative pole of the battery cell. Each pole piece 21 is inserted into a pole assembly hole 13. Each connector 22 is connected to the first side 11. The first cover 1 can stop the connector 22 in the direction from the first side 11 to the second side 12. The pole piece 21 and the connector 22 are respectively connected to the first insulating piece 23. The first insulating piece 23 separates the pole piece 21 from the connector 22. The second insulating piece 24 is connected to the pole piece 21. The second insulating piece 24 separates the pole piece 21 from the hole wall of the pole assembly hole 13.

[0068] The pole piece 21 realizes the electrical connection between the battery cell and the external device, and the pole piece 21 is assembled to the first cover 1 through the connector 22. By setting the first insulating member 23, the connection between the pole piece 21 and the connector 22 can be realized, and the pole piece 21 and the connector 22 can be insulated from each other, and the insulation effect between the pole piece 21 and the first cover 1 is further improved, thereby improving the safety of the top cover 100 and the battery 200, which is conducive to improving the structural stability of the pole assembly 2 and facilitating the assembly of the pole assembly 2. By setting the second insulating member 24, the pole piece 21 and the structure at the pole assembly hole 13 of the first cover 1 are insulated from each other, so as to improve the insulation effect between the pole piece 21 and the first cover 1, thereby improving the safety of the top cover 100 and the battery 200. By setting the first insulating member 23 and the second insulating member 24, when the pole assembly 2 is assembled to the first cover 1, the difficulty of positioning the relative position between the pole piece 21 and the first cover 1 is reduced, thereby reducing the production difficulty and helping to improve production efficiency.

[0069] See also Figure 5 and Figure 6 In some embodiments, the two ends of the pole piece 21 extend out of the two ends of the pole assembly hole 13, respectively, so as to facilitate the connection between the pole piece 21 and the battery cell. In some embodiments, the pole piece 21 includes a column segment 211 and a sheet segment 212 connected to each other. In the direction from the first side 11 to the second side 12, the extension length of the column segment 211 is longer than the extension length of the sheet segment 212, and the column segment 211 is inserted into the pole assembly hole 13. In the direction from the first side 11 to the second side 12, the projection range of the sheet segment 212 is larger than the projection range of the pole segment 211, so as to facilitate the connection between the sheet segment 212 and the battery cell.

[0070] See also Figure 3 , Figure 5 and Figure 6 In some embodiments, the second insulating member 24 is disposed around the outer periphery of the column-shaped segment 211. The sealing member 3 is disposed around the outer periphery of the second insulating member 24. The sealing member 3 is disposed between the sheet-shaped segment 212 and the first side 11 to improve the insulation effect between the pole member 21 and the first cover member 1.

[0071] See also Figure 3 , Figure 5 and Figure 6 In some embodiments, the projection shape of the connector 22 is annular along the direction from the first side 11 to the second side 12. Increasing the connection surface between the connector 22 and the pole member 21 is conducive to improving the stability of the connection between the connector 22 and the pole member 21, and also facilitates the pole member 21 to pass through the connector 22 and connect to the battery cell. As an exemplary example, the shape of the connector 22 includes but is not limited to a circular ring, a square ring, and other shapes of rings.

[0072] See also Figure 3 , Figure 5 and Figure 6 In some embodiments, the sealing assembly groove 221 is provided on a side of the connecting member 22 facing the first side 11 . Part of the structure of the pole member 21 is located in the sealing assembly groove 221 .

[0073] See also Figure 3 , Figure 5 and Figure 6 In some embodiments, the first insulating member 23 and the second insulating member 24 are injection molded parts. After the pole member 21 and the connecting member 22 are assembled, the first insulating member 23 and the second insulating member 24 are formed by injection molding. In some embodiments, the first insulating member 23 and the second insulating member 24 are split molding structures. In other embodiments, the first insulating member 23 and the second insulating member 24 are integrally molded structures (not shown).

[0074] See also Figure 5 and Figure 6 In some embodiments, the connecting member 22 is provided with a first positioning portion 222. The first insulating member 23 is concave-convexly matched with the first positioning portion 222. The pole member 21 is provided with a second positioning portion 2111. The second insulating member 24 is concave-convexly matched with the second positioning portion 2111.

[0075] By providing the first positioning portion 222, at least a portion of the structure between the first insulating member 23 and the connecting member 22 can be interlocked with each other, so as to reduce the possibility of the first insulating member 23 loosening or falling off, which is conducive to improving the connection stability between the first insulating member 23 and the connecting member 22. By providing the second positioning portion 2111, at least a portion of the structure between the second insulating member 24 and the pole member 21 can be interlocked with each other, so as to reduce the possibility of the second insulating member 24 loosening or falling off, which is conducive to improving the connection stability between the second insulating member 24 and the pole member 21. Thereby, the structural stability of the pole assembly 2 is improved, and the safety of the battery 200 is improved.

[0076] See also Figure 5 and Figure 6In some embodiments, the first positioning portion 222 is a hole-slot structure provided in the connecting member 22. The first insulating member 23 protrudes into the hole-slot structure of the first positioning portion 222, so that the first insulating member 23 and the connecting member 22 are interlocked. The second positioning portion 2111 is a hole-slot structure provided in the column-shaped section 211 of the pole member 21. The second insulating member 24 protrudes into the hole-slot structure of the second positioning portion 2111, so that the second insulating member 24 and the pole member 21 are interlocked. As an illustrative example, the first positioning portion 222 is a through hole, and the second positioning portion 2111 is a blind hole.

[0077] It is understood that in other embodiments, the first positioning portion 222 may be a protruding structure protruding from the connecting member 22. The protruding structure of the first positioning portion 222 protrudes into the hole structure of the first insulating member 23, so that the first insulating member 23 and the connecting member 22 are mutually embedded. The second positioning portion 2111 may be a protruding structure protruding from the column section 211 of the pole member 21. The second positioning portion 2111 protrudes into the hole structure of the second insulating member 24, so that the second insulating member 24 and the pole member 21 are mutually embedded.

[0078] See also Figure 3 , Figure 5 and Figure 6 In some embodiments, the pole piece 21 is located on the side of the connecting piece 22 facing the first side 11. The first insulating piece 23 includes a first insulating portion 231 and a second insulating portion 232 connected to each other. The first insulating portion 231 is located on the side of the connecting piece 22 facing the first side 11. The second insulating portion 232 is located on the side of the connecting piece 22 facing away from the first side 11. The first insulating portion 231 and the second insulating portion 232 clamp the connecting piece 22. A portion of the first insulating portion 231 extends to the side of the pole piece 21 facing the first side 11. A portion of the first insulating portion 231 extends to the side of the pole piece 21 facing away from the first side 11. The first insulating portion 231 clamps the pole piece 21.

[0079] The first insulating portion 231 and the second insulating portion 232 connected to each other are respectively located on opposite sides of the connecting member 22, so that the first insulating member 23 clamps the connecting member 22 to achieve the connection between the first insulating member 23 and the connecting member 22, and the connection stability between the first insulating member 23 and the connecting member 22 is improved through the clamping connection. The first insulating portion 231 clamps the pole member 21 to achieve the connection between the first insulating member 23 and the connecting member 22, and the connection stability between the first insulating member 23 and the connecting member 22 is improved through the clamping connection.

[0080] See also Figure 3 , Figure 5 and Figure 6In some embodiments, the first insulating portion 231 is located in the sealing assembly groove 221. The first insulating portion 231 clamps the portion of the pole member 21 located in the sealing assembly groove 221. In some embodiments, a portion of the first insulating portion 231 is located on the side of the sheet-shaped segment 212 of the pole member 21 away from the first side 11, and a portion of the first insulating portion 231 is located on the side of the sheet-shaped segment 212 of the pole member 21 facing the first side 11. The first insulating portion 231 clamps the sheet-shaped segment 212. An insulating assembly groove 2121 is provided on the periphery of the sheet-shaped segment 212 facing the first side 11. A plurality of insulating assembly grooves 2121 are provided and are spaced apart in the circumferential direction. A portion of the first insulating portion 231 fills the insulating assembly groove 2121. And a side of the first insulating portion 231 facing the first side 11 is flush with a side of the sheet-shaped segment 212 facing the first side 11.

[0081] In some embodiments, the connection method of the connection member 22 of the pole assembly 2 and the pole assembly groove 14 of the first cover member 1 includes welding, fusion, bonding, etc.

[0082] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A top cover for connecting to a battery housing, characterized in that: include: A first cover member having a first side and a second side opposite to each other, the first side being configured to be connected to the housing, the first cover member being provided with two pole assembly holes, each of the pole assembly holes penetrating the first side and the second side; and Two pole assemblies, each of which is arranged in one of the pole assembly holes, each of which is connected to the first side, the first cover member can stop the pole assembly in the direction from the first side to the second side, one of the two pole assemblies is configured to be electrically connected to the positive electrode of the battery cell, and the other is configured to be electrically connected to the negative electrode of the battery cell; Each of the pole assemblies comprises: A pole piece, configured to be electrically connected to the positive electrode or the negative electrode of the battery cell, and the pole piece is inserted into the pole assembly hole; A connecting member connected to the first side, wherein the first cover member can stop the connecting member in a direction from the first side to the second side; A first insulating member, the pole member and the connecting member are respectively connected to the first insulating member, and the first insulating member separates the pole member and the connecting member; and The second insulating member is connected to the pole member, and the second insulating member separates the pole member from the hole wall of the pole assembly hole.

2. The top cover according to claim 1, characterized in that: The connecting member is provided with a first positioning portion, and the first insulating member and the first positioning portion are matched in a concave-convex manner. The pole member is provided with a second positioning portion, and the second insulating member and the second positioning portion are matched in a concave-convex manner.

3. The top cover according to claim 1, characterized in that: The pole piece is located on the side of the connecting piece facing the first side, the first insulating piece includes a first insulating portion and a second insulating portion connected to each other, the first insulating portion is located on the side of the connecting piece facing the first side, the second insulating portion is located on the side of the connecting piece away from the first side, the first insulating portion and the second insulating portion clamp the connecting piece, a portion of the first insulating portion extends to the side of the pole piece facing the first side, a portion of the first insulating portion extends to the side of the pole piece away from the first side, and the first insulating portion clamps the pole piece.

4. The top cover according to any one of claims 1 to 3, characterized in that: The top cover also includes two sealing members, one of which is provided between each of the pole assemblies and the first side, and each of the sealing members is arranged around the outer periphery of the pole assembly hole on the first side.

5. The top cover according to claim 4, characterized in that: The pole assembly is provided with a sealing assembly groove, and the sealing member is located in the sealing assembly groove.

6. The top cover according to any one of claims 1 to 3, characterized in that: The first cover is provided with two pole assembly grooves, each of which is provided on the first side, each of which is provided with a pole assembly hole in one of which, and each of which is connected with one of which.

7. The top cover according to claim 6, characterized in that: The first cover is also provided with an explosion-proof assembly groove and an explosion-proof assembly hole, wherein the explosion-proof assembly groove is provided on the first side, the explosion-proof assembly hole passes through the first side and the second side and is provided in the explosion-proof assembly groove, and the top cover also includes an explosion-proof valve, which is connected to the explosion-proof assembly groove and communicates with the second side through the explosion-proof assembly hole.

8. The top cover according to any one of claims 1 to 3, characterized in that: The top cover further includes a second cover member, which is disposed on the first side and covers a portion of the structure of each pole assembly along a direction from the first side to the second side.

9. A battery, characterized in that: It comprises a shell, a battery cell and a top cover as described in any one of claims 1 to 8, wherein the battery cell is arranged in the shell, the first side of the first cover is connected to the shell, one of the pole assemblies is connected to the positive electrode of the battery cell, and the other pole assembly is connected to the negative electrode of the battery cell.

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