Collecting member for secondary battery, cover plate assembly and secondary battery

Abstract

The utility model provides a current collecting member for a secondary battery, a cover plate assembly and the secondary battery, the current collecting member for the secondary battery comprises a substrate and an adapter pole, and the substrate is provided with a mounting hole; in the axial direction of the switching pole, the first end of the switching pole is provided with an assembling part used for being matched with an external component, the second end of the switching pole is arranged in the mounting hole in a penetrating mode, the second end is provided with a positioning groove, and an opening of the positioning groove is formed in the direction away from the first end. According to the utility model, the problem of high processing and production cost of the current collecting component in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and more specifically, to a current collector, a cover plate assembly, and a secondary battery for a secondary battery. Background Technology

[0002] Currently, the current collector components of secondary batteries typically consist of a substrate and a transfer terminal. The transfer terminal usually requires an assembly step and is a solid internal component. The manufacturing process typically involves stamping the raw material to form a blank. During stamping, the raw material runs along the periphery perpendicular to the stamping direction, resulting in a deviation between the stamped blank and the designed transfer terminal. This necessitates secondary machining to obtain the finished transfer terminal. However, this method has several problems: First, the deviation between the blank and the finished product is usually significant, requiring complex secondary machining to achieve the desired result, leading to high processing costs. Second, transfer terminals are typically circular, elliptical, or racetrack-shaped. Secondary machining often requires two tool settings and centering, as well as establishing a unified workpiece coordinate system and machine tool coordinate system. This process can easily cause the transfer terminal's center to shift, resulting in defective materials and increased production costs. Utility Model Content

[0003] The main objective of this invention is to provide a current collector component, a cover plate assembly, and a secondary battery for use in secondary batteries, so as to solve the problem of high processing and production costs of current collector components in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a current collector for a secondary battery is provided, comprising a substrate and an adapter post, the substrate having a mounting hole; the adapter post having a first end having an assembly portion for cooperating with an external component along its axial direction, the second end of the adapter post passing through the mounting hole, and having a positioning groove with the opening of the positioning groove facing away from the first end.

[0005] Furthermore, the center of the positioning groove is located on the central axis of the adapter post.

[0006] Furthermore, the cross-section of the positioning groove perpendicular to the axis gradually increases in the direction near the end of the second end.

[0007] Furthermore, the outer periphery of the adapter post has a limiting boss, which is in limiting contact with the surface of the substrate near the first end.

[0008] According to another aspect of the present invention, a cover plate assembly is provided, comprising: a cover plate, a conductive block, the aforementioned current collector for a secondary battery, and a sealing ring. The cover plate has a first through hole, the conductive block is disposed on the cover plate, and the conductive block has a second through hole. The substrate of the current collector is disposed below the cover plate, and the assembly portion of the current collector passes through the first through hole and the second through hole. The sealing ring is sleeved on the adapter post of the current collector, and the sealing ring is at least partially located between the hole wall of the first through hole and the adapter post.

[0009] Furthermore, the assembly part includes multiple assembly steps, each assembly step including a first step surface and a second step surface arranged axially. The first step surface is closer to the first segment of the adapter post than the second step surface. The conductive block abuts against the first step surface. The sealing ring includes a first sealing portion and a second sealing portion connected together. The first sealing portion is disposed between the second step surface and the lower surface of the cover plate. The second sealing portion of the sealing ring is disposed between the assembly part and the wall of the first through hole. The positioning groove of the current collector is projected axially onto the inner side of the second step surface. And / or the minimum distance between the first step surface and the second end of the adapter post is a first distance. The depth of the positioning groove of the current collector is less than the first distance.

[0010] Furthermore, the orthographic projection of the positioning groove of the current collector component along the axial direction is located inside the first step surface; and / or the minimum distance between the second step surface and the second end of the transition pole is the second distance, and the depth of the positioning groove of the current collector component along the axial direction is less than the second distance.

[0011] Furthermore, the assembly step also includes a third step surface, which is located between the second step surface and the first step surface. The sealing ring also includes a third sealing portion connected to the second sealing portion, which is disposed between the third step surface and the conductive block.

[0012] Furthermore, the orthogonal projection of the positioning groove of the flow collector along the axial direction is located inside the third step surface.

[0013] According to another aspect of the present invention, a secondary battery is provided, including the current collector for the secondary battery described above or the cover plate assembly described above.

[0014] By applying the technical solution of this utility model, a positioning groove is provided at the second end of the adapter post. On the one hand, the blank material at the first end of the adapter post can be filled simultaneously with the stamping of the positioning groove. That is, the filling part corresponding to the original positioning groove can be used to form the first end, thereby significantly reducing the amount of raw materials used and thus greatly reducing material costs. On the other hand, the deviation between the blank material obtained by stamping and the designed adapter post is small, and the finished adapter post can be obtained through simple secondary processing. In addition, the positioning groove can be used for positioning during secondary processing, thereby simplifying the secondary processing process, reducing process costs, improving production efficiency, and preventing the center of the adapter post from shifting. This improves the alignment between the center of the adapter post and the center of the machine tool, reduces the generation of defective materials, and thus reduces production costs. At the same time, the setting of the positioning groove can reduce the weight of the adapter post, thereby increasing the weight energy density of the secondary battery and improving the overall performance of the secondary battery. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A top view of the current collection component according to Embodiment 1 of this utility model is shown;

[0017] Figure 2 A cross-sectional view of the flow collector component of Embodiment 1 is shown;

[0018] Figure 3 A bottom view of the current collection component of Embodiment 1 is shown;

[0019] Figure 4 A top view of the adapter pole of Embodiment 1 is shown;

[0020] Figure 5 It shows Figure 4 A sectional view;

[0021] Figure 6 It shows Figure 4 A bottom view;

[0022] Figure 7 A top view of the adapter pole with a circular cross-section perpendicular to the axis of the positioning groove in Embodiment 1 is shown;

[0023] Figure 8 It shows Figure 7 A sectional view;

[0024] Figure 9 It shows Figure 7 A bottom view;

[0025] Figure 10 An exploded view of the cover plate assembly of Embodiment 1 is shown;

[0026] Figure 11 A schematic diagram of the cover plate assembly of Embodiment 1 is shown;

[0027] Figure 12 An exploded view of the cover plate assembly of Embodiment 2 is shown;

[0028] Figure 13 A schematic diagram of the cover plate assembly of Embodiment 2 is shown.

[0029] The above figures include the following reference numerals:

[0030] 10. Substrate; 20. Adapter post; 21. Assembly part; 211. Assembly step; 2111. First step surface; 2112. Second step surface; 2113. Third step surface; 22. Positioning groove; 23. Limiting boss; 30. Cover plate; 31. First through hole; 40. Conductive block; 41. Second through hole; 50. Sealing ring. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0034] To address the high processing cost of current collector components in existing technologies, this invention provides a current collector component, a cover plate assembly, and a secondary battery for use in secondary batteries.

[0035] Example 1

[0036] like Figures 1 to 9The current collector for a secondary battery shown includes a substrate 10 and a connecting terminal 20. The substrate 10 has a mounting hole. Along the axial direction of the connecting terminal 20, the first end of the connecting terminal 20 has a mounting portion 21 for cooperating with an external component. The second end of the connecting terminal 20 passes through the mounting hole and has a positioning groove 22. The opening of the positioning groove 22 is arranged in a direction away from the first segment.

[0037] In this embodiment, by providing a positioning groove 22 at the second end of the adapter post 20, the blank material at the first end of the adapter post 20 can be filled simultaneously with the stamping of the positioning groove 22. That is, the filling portion corresponding to the original positioning groove can be used to form the first end, thus significantly reducing the amount of raw material used and consequently reducing material costs. Furthermore, the deviation between the stamped blank and the designed adapter post 20 is small, allowing for simple secondary processing to obtain the finished adapter post. Additionally, the positioning groove 22 can be used for positioning during secondary processing, simplifying the process, reducing costs, improving production efficiency, and preventing center offset of the adapter post. This improves the alignment between the adapter post center and the machine tool center, reducing defective materials and further lowering production costs. Simultaneously, the positioning groove 22 reduces the weight of the adapter post 20, thereby increasing the weight energy density of the secondary battery and improving its overall performance. It should be noted that in this embodiment, the axis refers to the central axis of the adapter post 20, i.e., the axial direction. Figure 2 The up and down directions.

[0038] In this embodiment, the center of the positioning groove 22 is located on the central axis of the adapter pole 20, thereby improving the machining accuracy of the adapter pole 20. Specifically, the adapter pole 20 generally has a columnar symmetrical structure, and the positioning groove 22 is located at the bottom of the adapter pole 20. The positioning groove 22 is also set as a columnar symmetrical structure, expanding symmetrically around the center of the bottom of the adapter pole 20. In this way, aligning the center of the positioning groove 22 with the central axis of the adapter pole 20 improves the positioning accuracy during the machining process, reduces machining errors caused by center offset, thereby improving the machining accuracy of the adapter pole 20, reducing the defect rate, and further reducing production costs. At the same time, setting the center of the positioning groove 22 on the central axis of the adapter pole 20 can also optimize the material distribution during the stamping process, reduce material waste, and improve the alignment between the center of the adapter pole 20 and the machine tool center, reducing the generation of defective materials, thereby reducing production costs.

[0039] like Figure 2 , Figure 5 , Figure 8As shown, in this embodiment, the cross-section of the positioning groove 22 perpendicular to the axis gradually increases in the direction near the end of the second end, thereby facilitating the removal of the protrusion of the stamping machine or stamping die from the positioning groove 22 after the adapter pole 20 is processed. Specifically, the positioning groove 22 in this embodiment is set to a frustum-like shape, such as... Figure 5 , Figure 8 As shown, the peripheral surface of the positioning groove 22, along the central axis of the transition post 20, follows a similar pattern to a frustum, exhibiting a trumpet shape, and gradually widens from the first end to the second end. Figure 8 As shown, the positioning groove 22 is shaped like a frustum, with the surface of the positioning groove 22 near the first end being the top surface of the frustum and the surface away from the first end being the bottom surface of the frustum. The area of ​​the top surface of the frustum is smaller than the area of ​​the bottom surface. Preferably, a rounded corner is provided at the intersection of the top surface and the peripheral surface of the frustum to facilitate demolding. Figure 5 As shown, the cross-section of the positioning groove 22 perpendicular to the axis of the adapter post 20 is racetrack-shaped, but the variation pattern of the peripheral surface of the positioning groove 22 along the axis of the adapter post 20 is similar to... Figure 8 The same applies. Of course, the shape of the positioning groove 22 is not limited to this and can be adjusted according to actual needs to facilitate demolding after stamping.

[0040] like Figure 1 , Figure 4 , Figure 7 As shown, in this embodiment, the assembly part 21 includes multiple assembly steps 211. The distances of each assembly step 211 to the axis of the adapter pole 20 are arranged in ascending order along the direction extending from the first end to the second end of the adapter pole 20, thereby improving the assembly accuracy and stability of the adapter pole 20 and external components. Specifically, each assembly step 211 is arranged in a ring on the outer periphery of the adapter pole 20, and the outer periphery dimensions of each assembly step 211 are arranged in ascending order along the direction extending from the first end to the second end. That is, on a plane perpendicular to the axis of the adapter pole 20, the projection of the assembly step 211 closer to the first end is always inside the projection of the assembly step 211 farther from the first end, thereby facilitating the assembly of the adapter pole 20 and external components. In this embodiment, the axis of each assembly step 211 is consistent with the axis of the adapter pole 20, thereby making the adapter pole 20 as a whole symmetrical, and further improving the assembly efficiency of the adapter pole 20.

[0041] In this embodiment, along the axial direction of the adapter post 20, the projection of the positioning groove 22 is located inside all the assembly steps 211, meaning the positioning groove 22 does not extend circumferentially to directly below each assembly step 211. This achieves both positioning of the adapter post 20 and ensures its strength and stability. Since the centers of the positioning groove 22 and the assembly steps 211 in this embodiment are both located on the central axis of the adapter post 20, when the axial projection of the positioning groove 22 is located inside all the assembly steps 211, the positioning groove 22 will not affect the structural strength of the assembly steps 211.

[0042] In this embodiment, the outer periphery of the adapter post 20 has a limiting protrusion 23, which abuts against the surface of the substrate 10 near the first end, thereby reducing the assembly difficulty of the adapter post 20 and the substrate 10, enhancing the connection stability and assembly accuracy between the substrate 10 and the secondary battery, and simultaneously improving the structural strength of the adapter post 20, thereby improving the safety and reliability of the secondary battery during use. Specifically, in this embodiment, the limiting protrusion 23 is set as an annular protrusion, located on the outer periphery of the adapter post 20. The substrate 10 is plate-shaped, and the side of the limiting protrusion 23 near the substrate 10 abuts against the surface of the substrate 10, thereby preventing the adapter post 20 from passing entirely through the mounting hole, thus improving the assembly accuracy and reliability of the adapter post 20 and the substrate 10.

[0043] In this embodiment, the positioning groove 22 is disposed on the side of the limiting boss 23 near the substrate 10. Considering the convenience of connecting and assembling the adapter post 20 with external components, the assembly part 21 is disposed on the side away from the substrate 10. This allows the first end of the adapter post 20 to still be easily connected to other components after the second end of the adapter post 20 mates with the substrate 10. Furthermore, in this embodiment, both the limiting boss 23 and the positioning groove 22 are disposed on the second end of the adapter post 20. This allows the blank material at the positioning groove 22 to be partially squeezed to the limiting boss 23 during the stamping of the adapter post 20, thereby optimizing the material distribution of the adapter post 20, reducing material waste, lowering processing costs, and simultaneously improving the structural strength of the adapter post 20.

[0044] In this embodiment, the substrate 10 has a first surface and a second surface opposite to each other. The limiting boss 23 abuts against the first surface (i.e., the surface of the substrate 10 near the first end), and the end face of the second end of the adapter post 20 is flush with the second surface. That is, the substrate 10 is located at the second end of the adapter post 20, and the first surface is farther away from the second end than the second surface. Thus, by the abutting of the limiting boss 23 against the first surface, the mounting position of the substrate 10 and the adapter post 20 is limited, thereby simplifying the assembly process of the substrate 10 and the adapter post 20, reducing the assembly difficulty, and improving the assembly efficiency. Specifically, the distance from the side surface of the limiting boss 23 near the second end to the end of the second end is consistent with the thickness of the substrate 10. This allows the second surface of the substrate 10 to be flush with the end face of the second end of the adapter post 20 after the substrate 10 and the adapter post 20 cooperate to form a current collector, thereby facilitating the cooperation between the adapter post 20 and other components such as electrode assemblies, avoiding interference with other components, and preventing wrinkles in the electrode assemblies.

[0045] like Figure 3 , Figure 6 , Figure 9 As shown, in this embodiment, the cross-section of the positioning groove 22 perpendicular to the axis is circular, elliptical, or racetrack-shaped. The shape of the adapter post 20 is generally cylindrical, the only difference being that the cross-section of the adapter post 20 perpendicular to the axis can be circular, elliptical, racetrack-shaped, etc. Correspondingly, the positioning groove 22 matches the shape of the adapter post 20, and the cross-section of the positioning groove 22 perpendicular to the axis can also be set to circular, elliptical, racetrack-shaped, etc. Figure 5 , Figure 6 As shown, in this embodiment, the cross-section perpendicular to the axis is set in a racetrack shape. Of course, depending on the shape of the adapter post 20, the positioning groove 22 can also be set in other shapes, as long as it facilitates positioning and demolding, such as... Figure 8 , Figure 9 As shown, the cross-section of the positioning groove 22 perpendicular to the axis can also be set to a circle. It should be noted that the racetrack shape mentioned in this embodiment refers to a shape formed by setting a semicircle at each of the opposite ends of a rectangle, which is curved at both ends and straight in the middle.

[0046] like Figures 10 to 11As shown, this embodiment also provides a cover plate assembly, including: a cover plate 30, a conductive block 40, a sealing ring 50, and the aforementioned current collector for a secondary battery. The cover plate 30 has a first through hole 31, the conductive block 40 is disposed on the cover plate 30, and the conductive block has a second through hole 41; the substrate 10 of the current collector is disposed below the cover plate 30, and the assembly part 21 of the current collector passes through the first through hole 31 and the second through hole 41; the sealing ring 50 is sleeved on the adapter post 20 of the current collector, and at least a portion of the sealing ring 50 is located between the hole wall of the first through hole 31 and the adapter post 20. Specifically, in this embodiment, the conductive block 40 has a second through hole 41 in the middle that cooperates with the assembly part 21 of the adapter post 20, so that the conductive block 40 can be sleeved on the top of the adapter post 20; the sealing ring 50 also cooperates with the assembly part 21 and is sleeved on the outer periphery of the assembly part 21, such as... Figure 11 As shown, the sealing ring 50 is positioned below the conductive block 40 to achieve a seal between the conductive block 40 and the interior of the secondary battery. The cover plate 30 has a first through hole 31 to facilitate the insertion of the adapter post 20 and the sealing ring 50. In this way, the reliable installation and sealing of the cover plate assembly are achieved through the cooperation between the various components.

[0047] like Figure 10 , Figure 11As shown, in this embodiment, the assembly part 21 includes multiple assembly steps 211. The assembly steps 211 include a first step surface 2111 and a second step surface 2112 arranged axially. The first step surface 2111 is closer to the first end of the adapter post 20 than the second step surface 2112. The conductive block 40 abuts against the first step surface 2111. The sealing ring 50 includes a first sealing part and a second sealing part connected together. The first sealing part is disposed between the second step surface 2112 and the lower surface of the cover plate 30. The second sealing part of the sealing ring 50 is disposed between the assembly part 21 and the hole wall of the first through hole 31. The size of the positioning groove 22 should be set to facilitate positioning without affecting the structural strength of the adapter post 20, so as to ensure the reliability of the adapter post 20 and avoid deformation of the adapter post 20 under the pressure of the sealing ring 50, etc. The orthographic projection of the positioning groove 22 of the current collector component along the axial direction is located inside the second step surface 2112; and / or the minimum distance between the first step surface 2111 and the second end of the transition pole 20 is the first distance, and the depth of the positioning groove 22 of the current collector component along the axial direction is less than the first distance. In this way, on the one hand, the first stepped surface 2111 is used to cooperate with the conductive block 40, and the second stepped surface 2112 is used to cooperate with the cover plate 30 to compress the sealing ring 50, thereby improving the stability and reliability of the cover plate assembly. On the other hand, limiting the size of the positioning groove 22 improves the structural strength of the transition pole 20. Specifically, both the first stepped surface 2111 and the second stepped surface 2112 are annular. The axial projection of the positioning groove 22 of the current collector is located inside the second stepped surface 2112, that is, the axial projection of the positioning groove is located inside the inner ring of the second stepped surface. This can prevent the sealing ring 50 from compressing the second stepped surface 2112 and causing deformation of the transition pole 20. The axial depth of the positioning groove 22 is less than the first distance, that is, the positioning groove does not extend axially to the part of the assembly 21 used for welding with the conductive block 40, thus avoiding welding stress causing deformation of the transition pole 20. The surface of the second stepped surface 2112 near the first end can be flush with the surface of the limiting boss 23 near the first end. It should be noted that the lower surface of the cover plate 30 refers to the surface facing the inside of the secondary battery when it is assembled to form the secondary battery.

[0048] Specifically, such as Figure 10 , Figure 11As shown, in this embodiment, the centers of the first step surface 2111, the second step surface 2112, and the positioning groove 22 are all located on the central axis of the adapter pole 20. The second step surface 2112 has the largest distance to the central axis of the adapter pole 20. The first step surface 2111 and the positioning groove 22 are located on opposite sides of the second step surface 2112, and the depth of the positioning groove 22 along the axial direction of the adapter pole 20 does not exceed the vertical distance from the first step surface 2111 to the bottom of the adapter pole 20. Of course, depending on the actual situation, the positioning groove 22 can be configured such that its orthographic projection along the axial direction of the adapter pole 20 is located inside the second step surface 2112, or its depth along the axial direction of the adapter pole 20 is less than the first distance, as long as the structural strength of the adapter pole 20 is guaranteed.

[0049] In this embodiment, the assembly step 211 further includes a third step surface 2113, which is located between the second step surface 2112 and the first step surface 2111. The sealing ring 50 also includes a third sealing portion connected to the second sealing portion, which is disposed between the third step surface 2113 and the conductive block 40. That is, the sealing ring 50 is pressed onto both the second step surface 2112 and the third step surface 2113, thereby further improving the sealing effect of the cover assembly. In this embodiment, the sealing ring 50 is Z-shaped, with the first sealing portion and the third sealing portion arranged parallel to the surface of the cover 30 and on opposite sides of the second sealing portion. This allows the inner circumferential surface of the sealing ring 50 to engage with the second step surface 2112 and the third step surface 2113 respectively, thereby enhancing the sealing effect of the cover assembly.

[0050] In this embodiment, the orthogonal projection of the positioning groove 22 of the current collector component along the axial direction is located inside the third step surface 2113 to ensure the structural strength of the adapter pole 20 and to avoid deformation of the adapter pole 20 caused by the compression of the sealing ring 50 on the second step surface 2112 and the third step surface 2113. Preferably, the orthographic projection of the positioning groove 22 of the current collector component along the axial direction is located inside the first step surface 2111, and the minimum distance between the second step surface 2112 and the second end of the adapter pole 20 is the second distance. The depth of the positioning groove 22 of the current collector component along the axial direction is less than the second distance, thereby further improving the structural strength of the adapter pole 20. Specifically, the orthographic projection of the positioning groove 22 of the current collector component along the axial direction is located inside the first step surface 2111. This can prevent the adapter pole 20 from deforming due to the compression of the sealing ring 50, and at the same time, it can prevent the adapter pole 20 from deforming due to the compression of the first step surface 2111 by the conductive block 40. The depth of the positioning groove 22 along the axial direction is less than the second distance, which can prevent the deformation of the adapter pole 20 due to the compression of the second sealing part of the sealing ring 50.

[0051] This embodiment also provides a secondary battery, including the aforementioned current collector or cover assembly for a secondary battery. The secondary battery also includes electrode assemblies and a casing, among other components.

[0052] Example 2

[0053] Unlike Embodiment 1, the assembly part 21 in this embodiment only has a first step surface 2111 and a second step surface 2112, and does not have a third step surface 2113.

[0054] like Figure 12 , Figure 13 As shown, in this embodiment, the assembly part 21 includes multiple assembly steps 211. The assembly steps 211 include a first step surface 2111 and a second step surface 2112 arranged axially. The first step surface 2111 is closer to the first end of the adapter post 20 than the second step surface 2112. The conductive block 40 abuts against the first step surface 2111. The sealing ring 50 includes a first sealing part and a second sealing part connected together. The first sealing part is disposed between the second step surface 2112 and the lower surface of the cover plate 30. The second sealing part of the sealing ring 50 is disposed between the assembly part 21 and the hole wall of the first through hole 31. The size of the positioning groove 22 should be set to facilitate positioning without affecting the structural strength of the adapter post 20, so as to ensure the reliability of the adapter post 20 and avoid deformation of the adapter post 20 under the pressure of the sealing ring 50. The axial projection of the positioning groove 22 of the current collector is located inside the second step surface 2112; and / or the minimum distance between the first step surface 2111 and the second end of the adapter post 20 is the first distance, and the axial depth of the positioning groove 22 of the current collector is less than the first distance. Thus, on the one hand, the first step surface 2111 is used to mate with the conductive block 40, and the second step surface 2112 is used to mate with the cover plate 30 to compress the sealing ring 50, thereby improving the stability and reliability of the cover plate assembly; on the other hand, limiting the size of the positioning groove 22 improves the structural strength of the adapter post 20.

[0055] Specifically, such as Figure 12 , Figure 13As shown, the first stepped surface 2111 is close to the top of the adapter post 20, and the second stepped surface 2112 is located below the first stepped surface 2111, so that the conductive block 40 abuts against the first stepped surface 2111, and the sealing ring 50 is partially pressed onto the second stepped surface 2112 to improve the stability of the cover plate assembly. Optionally, the sealing ring 50 can be configured as an L-shaped structure, so that the inner circumferential surface of the sealing ring 50 extending along the axial direction of the adapter post 20 and the surface perpendicular to the axial direction of the adapter post 20 respectively mate with the outer circumferential side surface of the assembly part 21 and the second stepped surface 2112 to improve the sealing performance. The two straight sides of the L-shaped structure of the sealing ring can be divided into a first sealing part and a second sealing part. The first sealing part is the part where the sealing ring is arranged parallel to the surface of the cover plate 30, such as... Figure 12 As shown, the upper surface of the first sealing part abuts against the lower surface of the cover plate 30, the lower surface of the first sealing part abuts against the second step surface 2112, the outer peripheral side of the second sealing part abuts against the wall of the first through hole 31, and the inner peripheral side of the second sealing part abuts against the outer peripheral side of the assembly part 21. In this embodiment, the centers of the first step surface 2111, the second step surface 2112, and the positioning groove 22 are all located on the central axis of the adapter pole 20. The distance from the second step surface 2112 to the central axis of the adapter pole 20 is the largest. The first step surface 2111 and the positioning groove 22 are located on opposite sides of the second step surface 2112, and the depth of the positioning groove 22 along the axial direction of the adapter pole 20 does not exceed the vertical distance from the first step surface 2111 to the bottom of the adapter pole 20. Of course, depending on the actual situation, the positioning groove 22 can be set only to ensure that the orthographic projection of the positioning groove 22 along the axis of the adapter pole 20 is located inside the second step surface 2112, or only to ensure that the depth of the positioning groove 22 along the axis of the adapter pole 20 is less than the first distance, so as to ensure the structural strength of the adapter pole 20.

[0056] Preferably, the orthographic projection of the positioning groove 22 of the current collector component along the axial direction is located inside the first step surface 2111; and / or the minimum distance between the second step surface 2112 and the second end of the adapter pole 20 is the second distance, and the depth of the positioning groove 22 of the current collector component along the axial direction is less than the second distance, thereby further improving the structural strength of the adapter pole 20.

[0057] It should be noted that "multiple" in the above embodiments refers to at least two.

[0058] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0059] 1. The positioning groove solves the problem of high processing and production costs of current collection components in the existing technology;

[0060] 2. By setting a positioning groove at the second end of the adapter post, the blank of the first end of the adapter post can be filled at the same time as the positioning groove is formed by stamping. That is, the filling part corresponding to the original positioning groove can be used to form the first end, thereby significantly reducing the amount of raw materials used and thus greatly reducing material costs.

[0061] 3. The deviation between the blank obtained by stamping and the designed adapter post is small. The finished adapter post can be obtained through simple secondary processing. In addition, the positioning groove can be used for positioning during secondary processing, thereby simplifying the secondary processing process, reducing process costs, improving production efficiency, and making it less likely to cause the center of the adapter post to shift. It can improve the alignment between the center of the adapter post and the center of the machine tool, reduce the generation of defective materials, and thus reduce production costs.

[0062] 4. The positioning groove can reduce the weight of the adapter post, thereby increasing the weight energy density of the secondary battery and improving the overall performance of the secondary battery.

[0063] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0066] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A current collecting member for a secondary battery, characterized by, include: A substrate (10) having mounting holes; The adapter pole (20) has a first end with a mounting part (21) for cooperating with an external component along the axial direction of the adapter pole (20). The second end of the adapter pole (20) passes through the mounting hole and has a positioning groove (22). The opening of the positioning groove (22) is arranged in a direction away from the first end.

2. The current-collecting member for a secondary battery according to claim 1, characterized by The center of the positioning groove (22) is located on the central axis of the adapter post (20).

3. The current-collecting member for a secondary battery according to claim 1, characterized in that, The cross section of the positioning groove (22) perpendicular to the axis gradually increases in the direction of the end near the second end.

4. The current-collecting member for a secondary battery according to claim 1, characterized in that, The outer periphery of the adapter post (20) has a limiting boss (23), which is in limiting contact with the surface of the substrate (10) near the first end.

5. A cover plate assembly characterized by, include: A cover plate (30) having a first through hole (31); A conductive block (40) is disposed on the cover plate (30) and the conductive block (40) has a second through hole (41); The current collector for a secondary battery according to any one of claims 1-4, wherein the substrate (10) of the current collector is disposed below the cover plate (30), and the assembly part (21) of the current collector passes through the first through hole (31) and the second through hole (41); A sealing ring (50) is sleeved on the adapter post (20) of the current collector, and at least a portion of the sealing ring (50) is located between the wall of the first through hole (31) and the adapter post (20).

6. The cover plate assembly of claim 5, wherein, The assembly part (21) includes multiple assembly steps (211), each assembly step (211) including a first step surface (2111) and a second step surface (2112) arranged axially. The first step surface (2111) is closer to the first end of the adapter post (20) than the second step surface (2112). The conductive block (40) abuts against the first step surface (2111). The sealing ring (50) includes a first sealing portion and a second sealing portion connected together. The first sealing portion is disposed between the second step surface (2112) and the lower surface of the cover plate (30). The second sealing portion of the sealing ring (50) is disposed between the assembly part (21) and the wall of the first through hole (31). The positioning groove (22) of the current collecting component is projected axially onto the inner side of the second step surface (2112); and / or The minimum distance between the first step surface (2111) and the second end of the adapter post (20) is the first distance, and the depth of the positioning groove (22) of the current collecting member along the axial direction is less than the first distance.

7. The cover plate assembly according to claim 6, characterized in that, The orthographic projection of the positioning groove (22) of the current collecting component along the axial direction is located inside the first step surface (2111); and / or The minimum distance between the second step surface (2112) and the second end of the adapter post (20) is the second distance, and the depth of the positioning groove (22) of the current collecting member along the axial direction is less than the second distance.

8. The cover plate assembly of claim 6, wherein, The assembly step (211) further includes a third step surface (2113), which is located between the second step surface (2112) and the first step surface (2111). The sealing ring (50) further includes a third sealing portion connected to the second sealing portion, which is disposed between the third step surface (2113) and the conductive block (40).

9. The cover plate assembly according to claim 8, characterized in that, The positioning groove (22) of the flow collecting component is projected along the axial direction onto the inner side of the third step surface (2113).

10. A secondary battery characterized by comprising: It includes the current collector for a secondary battery as described in any one of claims 1-4 or the cover plate assembly as described in any one of claims 5 to 9.

Images