Battery top cover structure and battery

Abstract

The utility model discloses a battery top cover structure and a battery, the battery top cover structure comprises a top cover sheet and a pole, and the top cover sheet is provided with a through hole; the terminal post is at least partially arranged in the through hole in a penetrating manner, the terminal post comprises a main body part, a flanging part and a convex part, the flanging part and the convex part are arranged on the same side of the main body part and are arranged at an interval, a first groove is formed between the flanging part and the convex part, and a second groove is formed in the convex part. Compared with the prior art, the first groove and the second groove are formed in the post terminal, on one hand, the first groove can extrude a post terminal raw material to the flanging part during upsetting so as to facilitate formation of the flanging part, and on the other hand, the first groove is used for dividing the flanging part and the post terminal main body so as to facilitate subsequent flanging; and meanwhile, the lug boss is also provided with the second groove, and the pole raw material can be extruded towards the lug boss by the second groove during upsetting, so that the lug boss has a certain thickness to provide a welding part of the connecting piece, and the welding part is extruded by using less raw material.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of new energy, and particularly to a battery top cover structure and a battery. Background Art

[0002] The battery terminal is an important part of the battery. During the battery manufacturing process, the terminal is upset to form a unified shape and size, so as to enhance the structural strength of the terminal and facilitate assembly at the same time.

[0003] In the prior art, after the terminal is upset, since the flanging part is still connected to the whole terminal, when flanging the flanging part, stress will concentrate on the root, resulting in material extrusion or tearing, which affects the production quality of the terminal; and a connecting piece usually needs to be welded on the terminal to provide a larger contact area. In order to form the part for welding the connecting piece on the terminal, the thickness of the terminal is relatively thick, which increases the raw material of the terminal and the production cost. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the present utility model provides a battery top cover structure and a battery, which can save materials and reduce production costs.

[0005] In order to achieve the above object, the present utility model adopts the following technical solutions:

[0006] A battery top cover structure includes a top cover sheet and a terminal. The top cover sheet is provided with a through hole; at least part of the terminal passes through the through hole. The terminal includes a main body part, a flanging part and a protruding part. The flanging part and the protruding part are arranged on the same side of the main body part and are spaced apart. A first groove is formed between the flanging part and the protruding part, and a second groove is formed in the protruding part.

[0007] As one of the implementation manners, the battery top cover structure includes a pressure-resistant part. The pressure-resistant part includes a horizontal part and a vertical part connected to each other. The vertical part is clamped between the main body part and the through hole, and the horizontal part is located between the flanging part and the top cover sheet; the battery top cover structure includes an insulating bottom plate. The insulating bottom plate is arranged on the side of the top cover sheet facing the flanging part, and at least part of the insulating bottom plate is clamped between the horizontal part and the top cover sheet.

[0008] As one of the implementation manners, the top cover sheet includes a top cover boss, and the top cover boss extends towards the direction close to the horizontal part to support the horizontal part.

[0009] As one of the implementation manners, the insulating bottom plate includes an extending part, and the extending part extends towards the direction close to the horizontal part. The extending part is clamped between the horizontal part and the top cover sheet.

[0010] As one embodiment, the main body includes a bottom and a side portion, the side portion and the flange portion are respectively connected to opposite sides of the bottom, the side portion extends away from the bottom, and the side portion and the bottom are surrounded to form a third groove.

[0011] As one implementation manner, the pole is made of a single material or a composite material.

[0012] As one embodiment, the pole includes a limiting portion, which is connected to a side of the side away from the bottom, extends in a direction away from the third groove, and overlaps a side of the top cover sheet away from the flange portion.

[0013] As one of the embodiments, the pole includes a limiting portion, which is connected to a side of the main body away from the flange portion, and the limiting portion and the flange portion are clamped on two opposite side surfaces of the top cover sheet; the top cover sheet is provided with a limiting groove connected to the through hole, the main body is at least partially penetrated into the through hole, and the limiting portion is at least partially arranged in the limiting groove.

[0014] As one embodiment, in the direction perpendicular to the axis of the through hole, the length of the flange portion is L1, in the direction of the axis of the through hole, the length of the protrusion portion is L2, the length of the flange portion is L3, the length of the limit portion is L4, and the length of L3 is L5. <L4,L3<L2<L1;在垂直于所述通孔的轴线方向上,所述第一凹槽的宽度为D1,所述第二凹槽的宽度为D2,D1<D2。

[0015] The utility model also provides a battery, comprising the battery top cover structure and a battery shell in any one of the above embodiments, wherein the battery top cover structure is connected to the battery shell to define a housing space, and a battery cell is arranged in the housing space.

[0016] The beneficial effects of the present utility model are as follows: The embodiment of the present application provides a battery top cover structure and a battery. The battery top cover structure includes a top cover sheet and a pole column. The top cover sheet is provided with a through hole; at least a part of the pole column is inserted into the through hole. The pole column includes a main body part, a flanging part and a protruding part. The flanging part and the protruding part are arranged on the same side of the main body part and are spaced apart. A first groove is formed between the flanging part and the protruding part, and a second groove is formed on the protruding part. Compared with the prior art, the pole column of the present application is formed with a first groove and a second groove. On the one hand, the first groove can squeeze the pole column raw material towards the flanging part during upsetting, facilitating the formation of the flanging part. On the other hand, the first groove is used to divide the flanging part and the pole column main body, facilitating subsequent flanging; at the same time, the protruding part is also provided with a second groove, which can squeeze the pole column raw material towards the protruding part during upsetting, so that the protruding part has a certain thickness to provide a part for welding the connecting piece. Using less raw material to extrude the welding part can avoid welding through the pole column when welding the connecting piece, reduce the weight of the pole column, reduce the forming difficulty of the flatness of the end face of the protruding part, and save materials. For a battery adopting this top cover structure, during battery assembly, the pole column has good structural strength, is convenient for assembly, and can reduce the use of pole column raw materials during the production process, effectively reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 6 shows a schematic structural diagram of a battery according to an embodiment of the present utility model;

[0018] Figure 2 FIG. 10 shows a schematic cross-sectional view of a battery according to an embodiment of the present utility model;

[0019] Figure 3 FIG. 14 shows a schematic cross-sectional view of a battery top cover structure according to an embodiment of the present utility model;

[0020] Figure 4 FIG. 18 shows a schematic structural diagram of a pole column according to an embodiment of the present utility model;

[0021] Figure 5 is Figure 3 an enlarged view of part A in FIG.

[0022] Figure 6 is Figure 5 an enlarged view of part B in FIG.

[0023] Reference Numerals: 10, battery top cover structure; 20, battery case; 30, accommodation space; 1, top cover sheet; 11, through hole; 12, outer side surface; 13, inner side surface; 14, limiting groove; 15, top cover boss; 2, pole; 21, main body portion; 22, flanging portion; 23, protruding portion; 24, first groove; 25, second groove; 26, limiting portion; 27, third groove; 251, rounded corner; 211, bottom; 212, side portion; 3, seal; 4, plastic part; 5, pressure-resistant part; 51, horizontal portion; 52, vertical portion; 6, insulating bottom plate; 61, extending portion. Detailed Implementation Manner

[0024] In the present utility model, the terms "arranged", "provided with", and "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, components, or constituent parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0027] Moreover, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific circumstances.

[0028] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] Referring to Figure 1 and Figure 2 , an embodiment of the present application provides a battery, including a battery top cover structure 10 and a battery case 20. The battery top cover structure 10 is connected to the opening side of the battery case 20. The battery top cover structure 10 and the battery case 20 define an accommodation space 30, and an electric core is arranged in the accommodation space 30.

[0030] It should be noted that the electric core is installed in the accommodation space 30 and contacts the battery top cover structure 10. The battery top cover structure 10 serves as a connection point between the electric core and the external circuit and undertakes the important task of conducting current.

[0031] Referring to Figure 3 and Figure 4 , the above-mentioned battery top cover structure 10 includes a top cover sheet 1 and a pole column 2. The top cover sheet 1 is provided with a through hole 11; at least a part of the pole column 2 is inserted into the through hole 11. The pole column 2 includes a main body portion 21, a flanging portion 22 and a protruding portion 23. The flanging portion 22 and the protruding portion 23 are arranged on the same side of the main body portion 21 and are spaced apart. A first groove 24 is formed between the flanging portion 22 and the protruding portion 23, and a second groove 25 is formed in the protruding portion 23.

[0032] In practical applications, the top cover sheet 1 is connected to the battery case 20. The top cover sheet 1 is provided with a through hole 11, and the pole column 2 is arranged in the through hole 11. The pole column 2 is connected to the battery case 20 through the top cover sheet 1, so as to facilitate the connection between the pole column 2 and the electric core and realize the function of conducting current.

[0033] The pole column 2 can be made into a specific shape by upsetting.

[0034] In one embodiment, the pole column 2 is formed with the main body portion 21, the flanging portion 22 and the protruding portion 23 by upsetting. The flanging portion 22 and the protruding portion 23 are connected to the side of the main body portion 21 close to the electric core. The flanging portion 22 is folded towards the direction close to the top cover sheet 1 for clamping the top cover sheet 1 to improve the connection reliability between the pole column 2 and the top cover sheet 1; a first groove 24 is formed between the flanging portion 22 and the protruding portion 23. The first groove 24 is beneficial to extruding the raw material towards the flanging portion 22 during upsetting to form a thin-wall structure convenient for flanging. At the same time, the first groove 24 can separate the flanging portion 22 from the main body portion 21, which is convenient for folding the flanging portion 22 and avoiding stress concentration during flanging, so as to prevent the situation of material extrusion or tearing of the flanging portion 22.

[0035] Moreover, the convex portion 23 is formed with a second groove 25. The formation of the second groove 25 is conducive to squeezing the raw material towards the convex portion 23 during caulking, so as to increase the thickness of the convex portion 23. The convex portion 23 with a certain thickness can be used to weld the connecting piece, realizing the extrusion of the welding part with less raw material.

[0036] It should be noted that the flanging portion 22 can be flanged by press riveting or spin riveting.

[0037] Compared with the prior art, the terminal post 2 of the present application is formed with a first groove 24 and a second groove 25. On the one hand, the first groove 24 can squeeze the raw material of the terminal post 2 towards the flanging portion 22 during caulking, facilitating the formation of the flanging portion 22. On the other hand, the first groove 24 is used to divide the flanging portion 22 and the main body of the terminal post 2, facilitating subsequent flanging. At the same time, the convex portion 23 is also provided with a second groove 25. The second groove 25 can squeeze the raw material of the terminal post 2 towards the convex portion 23 during caulking, so that the convex portion 23 has a certain thickness to provide a welding part for the connecting piece, extruding the welding part with less raw material, avoiding welding through the terminal post 2 when welding the connecting piece, reducing the raw material usage of the terminal post 2, reducing the weight of the terminal post 2, reducing the forming difficulty of the flatness of the end face of the convex portion 23, and saving materials. For the battery with this top cover structure, during battery assembly, the terminal post 2 has good structural strength, facilitating assembly, and in the production process, the use of raw materials for the terminal post 2 can be reduced, effectively reducing the production cost.

[0038] Refer to Figure 5 and Figure 6 , the battery top cover structure 10 further includes a pressure-resistant member 5. The pressure-resistant member 5 includes a transverse portion 51 and a vertical portion 52 connected to each other. The vertical portion 52 is clamped between the main body portion 21 and the through hole 11, and the transverse portion 51 is located between the flanging portion 22 and the top cover sheet 1; the battery top cover structure 10 includes an insulating bottom plate 6. The insulating bottom plate 6 is provided on the side of the top cover sheet 1 facing the flanging portion 22, and the insulating bottom plate 6 is at least partially clamped between the transverse portion 51 and the top cover sheet 1.

[0039] In practical applications, an insulating bottom plate 6 is further provided on the side of the top cover sheet 1 facing the battery cell. The insulating bottom plate 6 can be used to insulate and protect the battery cell. The insulating bottom plate 6 is usually made of a relatively soft material such as plastic. Therefore, when the flanging portion 22 is flanged, the flanging portion 22 will squeeze the insulating bottom plate 6, and the insulating bottom plate 6 is prone to deformation under force, affecting the quality of the overall finished product.

[0040] Based on this, the present application provides a pressure-resistant member 5. The pressure-resistant member 5 is made of a high-strength special plastic and has good pressure-resistant performance. The insulating bottom plate 6 is clamped between the pressure-resistant member 5 and the top cover sheet 1, and the pressure-resistant member 5 is used to separate the flanging portion 22 and the insulating bottom plate 6. In this way, it can be ensured that when the flanging portion 22 is flanged, the pressure cannot be transmitted to the insulating bottom plate 6, so as to ensure that the insulating bottom plate 6 will not be deformed under force and improve the quality of battery production.

[0041] The pressure-resistant member 5 includes a horizontal portion 51 and a vertical portion 52 that are connected to each other. The vertical portion 52 is clamped between the pole column 2 and the hole wall of the through hole 11 to facilitate the fixation of the pressure-resistant member 5, while spacing the pole column 2 and the top cover sheet 1 apart. The horizontal portion 51 extends in a direction close to the insulating base plate 6 to space the flanging portion 22 and the insulating base plate 6 apart. The insulating base plate 6 is embedded between the horizontal portion 51 and the top cover sheet 1, which on the one hand facilitates the fixation of the insulating base plate 6 and on the other hand avoids the insulating base plate 6 from being subjected to the pressure of the flanging.

[0042] It should be noted that the pressure-resistant member 5 is made of a high-strength insulating material, such as polyetheretherketone and other materials.

[0043] Refer again to Figure 6 , the top cover sheet 1 includes a top cover boss 15, and the top cover boss 15 extends in a direction close to the horizontal portion 51 to abut against the horizontal portion 51.

[0044] In one embodiment, the insulating base plate 6 is clamped between the horizontal portion 51 and the top cover sheet 1. The top cover boss 15 is provided on the side of the top cover sheet 1 facing the horizontal portion 51, and the top cover boss 15 abuts against the horizontal portion 51. Such a setting can further avoid the insulating base plate 6 from being subjected to pressure; when the flanging pressure is transmitted to the horizontal portion 51, since the top cover boss 15 abuts against the horizontal portion 51, the pressure received by the horizontal portion 51 will be transmitted to the top cover boss 15, which can effectively avoid the horizontal portion 51 from transmitting the pressure to the insulating base plate 6, and the top cover boss 15 further plays a protective role for the insulating base plate 6.

[0045] Refer again to Figure 6 , the insulating base plate 6 includes an extension portion 61, and the extension portion 61 extends in a direction close to the horizontal portion 51, and the extension portion 61 is clamped between the horizontal portion 51 and the top cover sheet 1.

[0046] In one embodiment, a part of the insulating base plate 6 extends in a direction close to the horizontal portion 51 to form the extension portion 61, that is to say, the thickness of the extension portion 61 is smaller than the overall thickness of the insulating base plate 6. The extension portion 61 is embedded between the horizontal portion 51 and the top cover sheet 1 to realize the fixation of the insulating base plate 6. On the one hand, since the thickness of the extension portion 61 is smaller, the interval between the horizontal portion 51 and the top cover sheet 1 can be reduced, which is beneficial to reducing the overall thickness of the top cover structure and saving materials; on the other hand, since the thickness of the extension portion 61 is smaller, the horizontal portion 51 can use a smaller thickness to realize the protection of the extension portion 61, which is beneficial to reducing the volume of the pressure-resistant member 5 and saving production costs.

[0047] Refer again to Figure 4 , the main body portion 21 includes a bottom portion 211 and a side portion 212. The side portion 212 and the flanging portion 22 are respectively connected to opposite sides of the bottom portion 211. The side portion 212 extends in a direction away from the bottom portion 211, and a third groove 27 is formed by surrounding the side portion 212 and the bottom portion 211.

[0048] In practical applications, the main body portion 21 includes a side portion 212 and a bottom portion 211. The side portion 212 extends into the through hole 11, and a third groove 27 is formed by enclosing the bottom portion 211 and the side portion 212. The third groove 27 can serve as a weight-reducing hole, saving the material of the pole column 2, reducing the overall weight of the pole column 2, thereby reducing the weight of the entire battery and improving the energy density of the battery; the third groove 27 can also be used as a positioning hole to facilitate positioning during subsequent battery grouping and improve the assembly efficiency of the grouped batteries.

[0049] In one embodiment, the material of the pole column 2 can be a single material, such as a copper pole column or an aluminum pole column, etc. Single materials usually have lower costs, stable performance, simple manufacturing processes, and are easy to predict and control.

[0050] In one embodiment, the material of the pole column 2 can also be a composite material. For example, a copper-aluminum composite pole column, etc. Composite pole column materials usually combine the advantages of multiple materials, have better mechanical properties, thermal management capabilities, and electrochemical stability, and the proportions of the components in the composite material can be adjusted according to specific requirements to optimize specific properties.

[0051] Refer to again Figure 4 , the pole column 2 includes a limiting portion 26. The limiting portion 26 is connected to the side of the side portion 212 away from the bottom portion 211. The limiting portion 26 extends in a direction away from the third groove 27 and overlaps with the side of the top cover sheet 1 away from the flanging portion 22.

[0052] In practical applications, the limiting portion 26 is circumferentially connected to the top of the side portion 212 and overlaps on the top cover sheet 1. The overlap between the limiting portion 26 and the top cover sheet 1 can improve the connection stability between the pole column 2 and the top cover sheet 1, and avoid the phenomenon that the pole column 2 and the top cover sheet 1 become detached during long-term use or when subjected to external impact.

[0053] Refer to again Figure 5 , the limiting portion 26 is connected to the side of the main body portion 21 away from the flanging portion 22. The limiting portion 26 and the flanging portion 22 are clamped on opposite side surfaces of the top cover sheet 1; the top cover sheet 1 is provided with a limiting groove 14 communicating with the through hole 11. The main body portion 21 is at least partially inserted into the through hole 11, and the limiting portion 26 is at least partially disposed in the limiting groove 14.

[0054] In practical applications, the top cover sheet 1 has an outer side 12 and an inner side 13. The limiting portion 26 is located on the outer side 12 of the top cover sheet 1, and the flanging portion 22 is located on the inner side 13 of the top cover sheet 1. The limiting portion 26 and the flanging portion 22 respectively clamp the opposite side surfaces of the top cover sheet 1 to fix the pole column 2 and the top cover sheet 1. And the top cover sheet 1 is provided with a limiting groove 14, and at least part of the limiting portion 26 is located in the limiting groove 14. The limiting groove 14 limits the limiting portion 26 to prevent the limiting portion 26 from moving or loosening, thereby preventing loosening between the pole column 2 and the top cover sheet 1 and further improving the connection reliability between the pole column 2 and the top cover sheet 1.

[0055] Refer to again Figure 5 and Figure 6 , the battery top cover structure 10 further includes a seal 3 and a plastic part 4. The seal 3 is arranged between the limiting portion 26 and the top cover sheet 1 to realize the sealing function between the pole column 2 and the top cover sheet 1; the plastic part 4 is clamped between the limiting portion 26 and the top cover sheet 1 to play an insulating and protective role, preventing direct contact between the pole column 2 and the top cover, and protecting the pole column 2 from being damaged under external vibration and impact.

[0056] Refer to again Figure 4 , for clear description, Figure 4 in, X represents the axial direction of the through hole 11, and Y represents the direction perpendicular to the axial direction of the through hole 11.

[0057] In one embodiment, in the direction perpendicular to the axial direction of the through hole 11, the length of the flanging portion 22 is L1, and in the axial direction of the through hole 11, the length of the protruding portion 23 is L2, and L2 < L1. That is to say, when the flanging portion 22 is not flanged, in the axial direction of the through hole 11, the length of the unflanged flanging portion 22 is L1, L2 < L1, and the length of the unflanged flanging portion 22 is greater than the length of the protruding portion 23. The longer flanging portion 22 is beneficial to flanging, and at the same time, the protruding portion 23 is shorter than the flanging portion 22, which can avoid the protruding portion 23 affecting the flanging work.

[0058] In one embodiment, in the axial direction of the through hole 11, the length of the flanging portion 22 is L3, and the length of the limiting portion 26 is L4, and L3 < L4. Specifically, the thickness of the flanged flanging portion 22 is smaller than the thickness of the limiting portion 26. Since the limiting portion 26 is located on the outer side 12 of the top cover sheet 1, that is, outside the battery case 20, the thicker limiting portion 26 can improve its own structural strength, avoid deformation when being impacted, and further improve the overall structural reliability of the pole column 2.

[0059] In one embodiment, in the axial direction of the through hole 11, the length of the flanging portion 22 is L3, and the length of the protruding portion 23 is L2, where L3 < L2. That is, along the X direction, the length of the flanging portion 22 after flanging is less than the length of the protruding portion 23, which ensures that the protruding portion 23 has a certain thickness, protects the safety of the pole column 2 during welding, and avoids welding through the pole column 2 when welding the connecting piece on the protruding portion 23.

[0060] In one embodiment, in the direction perpendicular to the axis of the through hole 11, the width of the first groove 24 is D1, and the width of the second groove 25 is D2, where D1 < D2. The wider second groove 25 is beneficial for forming a larger range of the protruding portion 23, which facilitates welding the connecting piece. At the same time, the narrower first groove 24 is more likely to separate the flanging portion 22 and the main body of the pole column 2, so as to facilitate the flanging of the flanging portion 22.

[0061] Refer to again Figure 4 , in one embodiment, a chamfer 251 is provided at the opening of the second groove 25. The chamfer 251 can play a role in protecting the battery cell and prevent the battery cell from being scratched by the edges when connecting to the pole column 2.

[0062] Different from the prior art, the embodiment of the present application provides a battery top cover structure and a battery. The battery top cover structure 10 includes a top cover sheet 1 and a pole column 2. The top cover sheet 1 is provided with a through hole 11; at least a part of the pole column 2 is inserted into the through hole 11. The pole column 2 includes a main body portion 21, a flanging portion 22, and a protruding portion 23. The flanging portion 22 and the protruding portion 23 are arranged on the same side of the main body portion 21 and are spaced apart. A first groove 24 is formed between the flanging portion 22 and the protruding portion 23, and a second groove 25 is formed in the protruding portion 23. Compared with the prior art, the pole column 2 of the present application is formed with a first groove 24 and a second groove 25. On the one hand, the first groove 24 can squeeze the raw material of the pole column 2 towards the flanging portion 22 during upsetting, facilitating the formation of the flanging portion 22. On the other hand, the first groove 24 is used to separate the flanging portion 22 and the main body of the pole column 2, facilitating subsequent flanging; at the same time, the protruding portion 23 is also provided with a second groove 25. The second groove 25 can squeeze the raw material of the pole column 2 towards the protruding portion 23 during upsetting, so that the protruding portion 23 has a certain thickness to provide a welding part for the connecting piece, extruding the welding part with less raw material, avoiding welding through the pole column 2 when welding the connecting piece, reducing the weight of the pole column 2, reducing the forming difficulty of the flatness of the end face of the protruding portion 23, and saving materials. For a battery adopting this top cover structure, during battery assembly, the pole column 2 has good structural strength, is convenient for assembly, and can reduce the use of raw materials for the pole column 2 during the production process, effectively reducing the production cost.

[0063] The above are only specific embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A battery top cover structure, characterized in that, Comprising: A top cover sheet (1) provided with a through hole (11); A pole column (2), at least partially passing through the through hole (11). The pole column (2) includes a main body portion (21), a flanging portion (22), and a convex portion (23). The flanging portion (22) and the convex portion (23) are disposed on the same side of the main body portion (21) and are spaced apart. A first groove (24) is formed between the flanging portion (22) and the convex portion (23), and a second groove (25) is formed in the convex portion (23).

2. The battery top cover structure according to claim 1, characterized in that The battery top cover structure includes a pressure-resistant member (5). The pressure-resistant member (5) includes a transverse portion (51) and a vertical portion (52) connected to each other. The vertical portion (52) is clamped between the main body portion (21) and the through hole (11), and the transverse portion (51) is located between the flanging portion (22) and the top cover sheet (1); The battery top cover structure includes an insulating bottom plate (6). The insulating bottom plate (6) is disposed on the side of the top cover sheet (1) facing the flanging portion (22), and at least part of the insulating bottom plate (6) is clamped between the transverse portion (51) and the top cover sheet (1).

3. The battery top cover structure according to claim 2, characterized in that, The top cover sheet (1) includes a top cover boss (15). The top cover boss (15) extends in a direction close to the transverse portion (51) to abut against the transverse portion (51).

4. The battery top cover structure according to claim 2, characterized in that, The insulating bottom plate (6) includes an extending portion (61). The extending portion (61) extends in a direction close to the transverse portion (51), and the extending portion (61) is clamped between the transverse portion (51) and the top cover sheet (1).

5. The battery top cover structure according to claim 1, characterized in that, The main body portion (21) includes a bottom (211) and a side portion (212). The side portion (212) and the flanging portion (22) are respectively connected to opposite sides of the bottom (211). The side portion (212) extends away from the bottom (211), and a third groove (27) is formed by surrounding the side portion (212) and the bottom (211).

6. The battery top cover structure according to claim 1, wherein, The material of the pole column (2) is a single material or a composite material.

7. The battery top cover structure according to claim 5, characterized in that The pole column (2) includes a limiting portion (26). The limiting portion (26) is connected to the side portion (212) away from the bottom (211). The limiting portion (26) extends away from the third groove (27) and overlaps with the side of the top cover sheet (1) facing away from the flanging portion (22).

8. The battery top cover structure according to claim 1, wherein, The pole column (2) includes a limiting portion (26). The limiting portion (26) is connected to the side of the main body portion (21) away from the flanging portion (22). The limiting portion (26) and the flanging portion (22) are clamped on opposite side surfaces of the top cover sheet (1); The top cover sheet (1) is provided with a limiting groove (14) communicating with the through hole (11). At least part of the main body portion (21) passes through the through hole (11), and at least part of the limiting portion (26) is disposed in the limiting groove (14).

9. The battery top cover structure according to claim 8, wherein, In the direction perpendicular to the axis of the through hole (11), the length of the flanging portion (22) is L1, in the axial direction of the through hole (11), the length of the protruding portion (23) is L2, the length of the flanging portion (22) is L3, and the length of the limiting portion (26) is L4, where L3 < L4, L3 < L2 < L1; in the direction perpendicular to the axis of the through hole (11), the width of the first groove (24) is D1, and the width of the second groove (25) is D2, where D1 < D2.

10. A battery, characterized in that, Comprising the battery top cover structure (10) according to any one of claims 1-9 and a battery case (20), the battery top cover structure (10) is connected to the battery case (20) to define an accommodation space (30), and an electric core is provided in the accommodation space (30).

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