Current collecting plate, battery and electric equipment

Abstract

The utility model provides a current collecting disc, battery and electric equipment, the current collecting disc is used for connecting a naked battery cell and a pole of the battery, the naked battery cell comprises a central hole, the pole comprises an assembling groove, the current collecting disc comprises a disc body, a current collecting plate and a current collecting plate, the connecting structure is arranged on the side, facing the pole, of the disc body, and at least part of the connecting structure extends into the assembling groove and is electrically connected with the pole; the positioning structure is arranged on one side, facing the naked battery cell, of the disc body, and the positioning structure is in positioning fit with the center hole. According to the collector plate disclosed by the utility model, the thickness of the welding position of the collector plate and the pole can be increased by utilizing the connecting structure, so that the collector plate and the pole cannot be penetrated by welding when being welded, and the positioning structure is arranged to ensure the concentricity of the collector plate and a naked battery cell when the collector plate and the naked battery cell are welded, so that when the collector plate and the naked battery cell enter a shell, the welding efficiency is improved. The concentricity of the collector plate and the pole is ensured, the welding area of the collector plate and the pole is increased, and the overcurrent capacity of the welding position and the reliability of the battery are further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a collecting plate, a battery and an electrical device. Background Art

[0002] With the development of social economy, more and more electrical equipment uses cylindrical batteries as energy storage and supply devices, such as new energy vehicles, communication base stations, energy storage containers, etc.

[0003] The assembly process of cylindrical batteries usually involves welding the collector plate to the tab of the bare cell first, and then welding the collector plate to the pole. Since the collector plate is welded to the tab first, the relative position of the bare cell and the collector plate is fixed after welding. The difference between the outer diameter of the bare cell and the inner diameter of the shell is small, so the relative position of the bare cell and the pole is basically fixed after entering the shell.

[0004] However, with current welding technology, the collector plate and the bare cell may deviate from the concentricity during welding, resulting in the collector plate's welding position not being accurately matched with the pole's welding position when it is inserted into the shell, leading to failure problems such as cold welding in the subsequent welding process. Utility Model Content

[0005] In view of the above problems, the utility model provides a current collecting plate, a battery and an electrical device, which can ensure that the current collecting plate and the pole can be accurately positioned and the welding tensile force is high, thereby ensuring the current flow capacity of the weld mark position and the reliability of the battery.

[0006] The utility model provides a current collecting disk, which is used to connect the bare battery cell and the pole of a battery, wherein the bare battery cell comprises a center hole, and the pole comprises an assembly groove; the current collecting disk comprises: a disk body; a connecting structure, wherein the connecting structure is arranged on a side of the disk body facing the pole, and at least a part of the connecting structure extends into the assembly groove and is electrically connected to the pole; and a positioning structure, wherein the positioning structure is arranged on a side of the disk body facing the bare battery cell, and the positioning structure is positioned and matched with the center hole.

[0007] According to the current collecting disk of the utility model, by arranging a connecting structure on the side of the disk body facing the battery pole, the connecting structure can be used to increase the thickness of the welding position of the current collecting disk and the pole, so that the current collecting disk and the pole will not be welded through when they are welded, and by arranging a positioning structure on the side of the disk body facing the bare battery cell, the concentricity of the current collecting disk and the bare battery cell can be ensured when they are welded. In this way, when the current collecting disk and the bare battery cell are put into the shell, the connecting structure on the current collecting disk directly extends into the assembly groove of the pole, and the welding position of the current collecting disk and the welding position of the pole are quickly aligned to ensure the concentricity of the current collecting disk and the pole. In this case, welding the current collecting disk and the pole can ensure that the current collecting disk and the pole have sufficient welding area and high welding tensile force, which is beneficial to ensuring the current flow capacity of the welding position and the reliability of the battery.

[0008] In some embodiments, the connecting structure and the positioning structure are arranged opposite to each other along the axial direction of the disk body.

[0009] In some embodiments, a projection of the positioning structure in a reference plane is located within a projection of the connecting structure in the reference plane, and the reference plane is perpendicular to an axis of the battery.

[0010] In some embodiments, the disk body has a first surface facing the bare battery core, and the positioning structure is formed as a positioning protrusion protruding from the first surface.

[0011] In some embodiments, a cross-sectional area of ​​the positioning protrusion gradually decreases in an axial direction of the disk body and in a direction away from the disk body.

[0012] In some embodiments, the projection of the positioning protrusion in the reference plane is circular.

[0013] In some embodiments, the positioning structure is integrally formed with the disk body; or, the positioning structure is welded to the disk body.

[0014] In some embodiments, the disk body has a second surface facing away from the bare battery core, and the connecting structure is formed as a connecting boss protruding from the second surface.

[0015] The second aspect of the utility model provides a battery, comprising: a shell assembly, comprising a accommodating cavity, the shell assembly also comprising a pole, the pole comprising an assembly groove; a bare cell, the bare cell is arranged in the accommodating cavity, the bare cell comprises a center hole, and one end of the bare cell comprises a pole ear; the current collecting plate of the first aspect above, the disc body of the current collecting plate is welded to the pole ear of the bare cell, the positioning structure is embedded in the center hole to position and cooperate with the bare cell, the connecting structure extends into the assembly groove, and is welded to the pole.

[0016] According to the battery of the utility model, by setting the current collecting plate of the first aspect mentioned above, the concentricity of the current collecting plate and the bare battery cell can be ensured, so that when the current collecting plate and the bare battery cell are put into the shell, the concentricity of the current collecting plate and the pole is ensured, and the current collecting plate and the pole can have sufficient welding area and high welding tensile force, which is beneficial to ensure the current flow capacity of the welding mark position and the reliability of the battery.

[0017] The third aspect of the utility model further provides an electrical device, comprising: the battery of the second aspect.

[0018] According to the electric equipment of the utility model, when the battery of the second aspect is adopted, the overall reliability is high, which is beneficial to improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a partial schematic diagram of a battery of some embodiments of the utility model;

[0021] Figure 2 The battery of some embodiments of the present invention is Figure 1 Partial cross-section of section AA;

[0022] Figure 3 It is a schematic diagram of the structure of the current collecting plate of some embodiments of the utility model;

[0023] Figure 4 for Figure 2 A cross-sectional view of the corresponding collecting plate;

[0024] Figure 5 for Figure 4 The middle circle shows an enlarged view of site B;

[0025] Figure 6 The battery of other embodiments of the present invention is Figure 1 Partial cross-section of section AA;

[0026] Figure 7 for Figure 6 A cross-sectional view of the corresponding collecting plate;

[0027] Figure 8 for Figure 7 The middle circle shows an enlarged view of area C.

[0028] Description of reference numerals:

[0029] 400-battery;

[0030] 100-collecting plate;

[0031] 10-disc body; 101-perforation; 20-positioning structure; 30-connecting structure;

[0032] 200-shell assembly; 201-pole; 202-assembly groove; 203-avoidance gap; 204-blocking cover; 205-housing;

[0033] 300-bare cell; 301-center hole. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0035] With the development of social economy, more and more electrical equipment adopts cylindrical batteries as energy storage and supply devices, such as new energy vehicles, communication base stations, energy storage containers, etc. The assembly process of cylindrical batteries usually involves welding the collector plate to the tab of the bare cell first, and then welding the collector plate to the pole. Since the collector plate is welded to the tab first, the relative position of the bare cell and the collector plate is fixed after welding, and the difference between the outer diameter of the bare cell and the inner diameter of the shell is small, so that the relative position of the bare cell and the pole is basically fixed after entering the shell. However, with the current welding process, the collector plate and the bare cell may deviate from the concentricity during the welding process, resulting in the collector plate's welding position not being accurately matched with the pole's welding position when entering the shell, causing the laser welding position of the positive electrode of the battery to be misaligned, the weld print area is small, the welding tension is low, and even causes failure problems such as cold welding during the welding process, affecting the current capacity of the weld print position and the reliability of the battery.

[0036] In view of this, the embodiments of the utility model provide a current collecting plate, a battery and an electrical equipment. By setting a connecting structure, the connecting structure can be used to increase the thickness of the welding position between the current collecting plate and the pole, so that the current collecting plate and the pole will not be welded through when they are welded. By setting a positioning structure, the concentricity of the current collecting plate and the bare battery cell can be ensured when the current collecting plate and the bare battery cell are welded. In this way, when the current collecting plate and the bare battery cell are put into the shell, the connecting structure on the current collecting plate directly extends into the assembly groove of the pole, and the welding position of the current collecting plate and the welding position of the pole are quickly aligned to ensure the concentricity of the current collecting plate and the pole. In this case, welding the current collecting plate and the pole can ensure that the current collecting plate and the pole have sufficient welding area and high welding tensile force, which is beneficial to ensuring the current flow capacity of the welding position and the reliability of the battery.

[0037] Reference below Figure 1-Figure 8 A current collecting plate 100 according to an embodiment of the present invention is described.

[0038] refer to Figure 2 and Figure 6 The current collecting plate 100 of this embodiment can be used to connect the bare cell 300 and the pole 201 of the battery 400. The battery 400 can be a cylindrical battery. The bare cell 300 includes a center hole 301, and the pole 201 includes an assembly groove 202. Specifically, the current collecting plate 100 may include: a plate body 10, a positioning structure 20 and a connecting structure 30.

[0039] Among them, reference Figure 3 The outer contour of the disk body 10 can be a circular ring or other shapes, and the surface of the disk body 10 can be a continuous surface, or can also have a hollow structure. Of course, the utility model does not limit this, and the specific structure of the disk body 10 can be reasonably selected according to actual needs. The disk body 10 can be welded to the tab at the end of the bare battery cell 300 to achieve electrical connection between the collector disk 100 and the bare battery cell 300.

[0040] Combination Figure 4 and Figure 8 , the connection structure 30 is provided on the side of the disc body 10 facing the pole 201, and at least part of the connection structure 30 extends into the assembly groove 202 and is electrically connected to the pole 201. Specifically, when the current collecting disc 100 and the pole 201 are connected by welding such as laser welding, due to the thin thickness of the disc body 10 of the current collecting disc 100, there may be a problem that the current collecting disc 100 is welded through and the battery 400 is scrapped. Therefore, the current collecting disc 100 of this embodiment is provided with a connection structure 30 at the welding portion between the current collecting disc 100 and the pole 201, and the connection structure 30 can increase the overall thickness of the current collecting disc 100 at the welding portion, thereby preventing the current collecting disc 100 from being welded through. In the case of providing the connection structure 30 for the current collecting plate 100, on the one hand, since the thickness of the pole 201 itself is unchanged, it may be difficult for the energy of the laser welding equipment to quickly pass through the pole 201 to reach the current collecting plate, and on the other hand, the overall height of the current collecting plate 100 increases after being connected with the pole 201, and the space occupied inside the battery 400 increases. Therefore, in this embodiment, an assembly groove 202 is provided at a position corresponding to the pole 201 and the connection structure 30, and after the connection structure 30 is extended into the assembly groove 202, the connection structure 30 is welded to the pole 201. In this way, the welding efficiency and welding quality of the current collecting plate 100 and the pole 201 can be ensured, and the internal space of the battery 400 occupied by the current collecting plate 100 and the pole 201 can be reduced. In addition, through the cooperation of the assembly groove 202 and the connection structure 30, the current collecting plate 100 and the pole 201 can also be formed into a limited cooperation state in the circumferential direction, so that the relative positions of the two during the welding process are fixed to facilitate the welding operation.

[0041] Combination Figure 4 and Figure 8, the positioning structure 20 is arranged on the side of the disk body 10 facing the bare cell 300, and the positioning structure 20 is positioned and matched with the center hole 301 of the bare cell 300. Specifically, the bare cell 300 is formed by winding the positive electrode sheet, the diaphragm, and the negative electrode sheet after being stacked in sequence, that is, the bare cell 300 is a wound cell. Usually, the wound bare cell 300 is formed with a process hole, i.e., the center hole 301, at the center position. The center hole 301 can be used as the positioning and matching structure of the bare cell 300, and the positioning structure 20 can be a positioning protrusion or other structure. The positioning protrusion can be embedded in the center hole 301 of the bare cell 300, so as to ensure that the concentricity between the current collecting disk 100 and the bare cell 300 is good. Of course, in addition to this, the specific structure and position of the positioning and matching structure on the bare cell 300 and the positioning structure 20 on the current collecting disk 100 can be reasonably set according to actual needs. In this way, it can be ensured that during the welding process, the collector plate 100 is fixed relative to the end face of the bare cell 300 and is exactly in the target position so that the connection structure 30 and the assembly groove 202 of the pole 201 are accurately matched when the bare cell 300 is installed in the battery 400.

[0042] During the production and assembly process of the battery 400, the positioning structure 20 of the current collecting plate 100 can be first positioned and matched with the bare battery cell 300, and then the plate body 10 and the bare battery cell 300 can be welded, and then the whole formed by the plate body 10 and the bare battery cell 300 can be installed in the shell assembly 200 of the battery 400. Since the relative positions of the bare battery cell 300 and the current collecting plate 100 are fixed, the difference between the outer diameter of the bare battery cell 300 and the inner diameter of the outer shell 205 is small, and the relative position of the bare battery cell 300 and the outer shell 205 is basically fixed, so that after the bare battery cell 300 is put into the shell, the connecting structure 30 on the current collecting plate 100 can be accurately extended into the assembly groove 202 of the pole 201, and then the pole 201 and the connecting structure 30 can be welded.

[0043] It can be understood that, since the current collecting plate 100 in this embodiment is welded to the pole 201 and the pole 201 is positively charged, the current collecting plate 100 in this embodiment is a positive electrode current collecting plate 100 .

[0044] According to the collector plate 100 of the present invention, by providing a connection structure 30 on the side of the plate body 10 facing the pole 201 of the battery 400, the thickness of the welding position between the collector plate 100 and the pole 201 can be increased by using the connection structure 30, so that the collector plate 100 and the pole 201 will not be welded through when being welded, and by providing a positioning structure 20 on the side of the plate body 10 facing the bare battery cell 300, the concentricity of the collector plate 100 and the bare battery cell 300 can be ensured when the collector plate 100 and the bare battery cell 300 are welded. When the battery 100 and the bare battery cell 300 are put into the shell, the connecting structure 30 on the current collecting plate 100 directly extends into the assembly groove 202 of the pole 201, and the welding position of the current collecting plate 100 and the welding position of the pole 201 are quickly aligned to ensure the concentricity of the current collecting plate 100 and the pole 201. In this way, when the current collecting plate 100 and the pole 201 are welded, it can be ensured that the current collecting plate 100 and the pole 201 have sufficient welding area and high welding tension, thereby ensuring the current flow capacity of the welding position and the reliability of the battery 400.

[0045] In some embodiments, in combination Figure 4 and Figure 8 The projections of the connecting structure 30 and the positioning structure 20 in the reference plane have an overlapping part, and the reference plane is perpendicular to the axis of the battery 400. In this way, the thickness of the collecting plate 100 in the overlapping area of ​​the connecting structure 30 and the positioning structure 20 can be further increased, thereby increasing the laser welding process window at the positive electrode position, preventing the collecting plate 100 from being welded through, and improving the welding yield and the product yield of the battery 400.

[0046] In some embodiments, in combination Figure 1-Figure 8 The positioning structure 20 is arranged in the middle of the disk body 10. In this way, the process hole formed after the bare cell 300 is wound can be used as the center hole 301 to cooperate with the positioning structure 20, eliminating the need to set a positioning structure for the bare cell 300 to cooperate with the positioning structure 20. At the same time, it is easier to ensure the concentricity of the current collecting disk 100 and the bare cell 300. The connecting structure 30 and the positioning structure 20 are arranged relative to each other along the axial direction of the disk body 10. In this way, when the bare cell 300 and the current collecting disk 100 are put into the shell, it is convenient for the connecting structure 30 to quickly align with the assembly groove 202 on the pole 201, so as to facilitate subsequent welding.

[0047] In some embodiments, the projection of the positioning structure 20 in the reference plane is located within the projection of the connecting structure 30 in the reference plane, that is, the area of ​​the connecting structure 30 is larger than the area of ​​the positioning structure 20. In this way, it can be ensured that the connecting structure 30 and the pole 201 have a larger welding area, thereby increasing the welding tension between the connecting structure 30 and the pole 201 and ensuring the current flow capacity of the weld mark position.

[0048] In some embodiments, in combination Figure 2-Figure 8The disk body 10 has a first surface, the first surface faces the bare battery cell 300, and the positioning structure 20 is formed as a positioning protrusion protruding from the first surface. In this way, the structure of the positioning structure 20 is relatively simple and easy to implement.

[0049] In some embodiments, in combination Figure 4 and Figure 8 In the axial direction of the disk body 10 and in the direction away from the disk body 10, the area of ​​the positioning protrusion gradually decreases. For example, the positioning protrusion can be hemispherical, truncated cone, square cone, cone, square cone, and irregular shapes. Of course, the structure of the positioning protrusion is not limited to this and can be reasonably set according to actual needs. In this way, when the current collecting disk 100 and the bare battery cell 300 are assembled, the peripheral wall of the positioning protrusion can play a certain guiding role, so that it is easier to embed into the central hole 301 in the middle of the bare battery cell 300, and the structure is relatively simple and easy to manufacture.

[0050] In some embodiments, the projection of the positioning protrusion in the reference plane is circular, for example, the positioning protrusion can be hemispherical, truncated cone, conical, etc. In this way, the positioning protrusion cooperates well with the hole wall of the center hole 301 of the bare battery cell 300 (i.e., the positive electrode sheet or the negative electrode sheet), which can avoid squeezing or piercing the bare battery cell 300, and the structure is relatively simple and easy to implement.

[0051] In some embodiments, the diameter of the projection of the positioning protrusion on the reference plane is in the range of 5-8mm. For example, the diameter of the projection of the positioning protrusion on the reference plane can be 5mm, 6mm, 7mm or 8mm. Of course, the present invention is not limited to this. The projection diameter of the positioning protrusion can be reasonably selected within the above range according to actual needs. In this way, it can be avoided that the projection diameter of the positioning protrusion is too small, for example, less than 5mm, and cannot form an effective positioning fit with the bare battery cell 300. It can also be avoided that the projection diameter of the positioning protrusion is too large, for example, greater than 8mm, and extrusion is formed between the bare battery cell 300.

[0052] In some embodiments, the height of the positioning protrusion along the axial direction of the disk body 10 ranges from 2 to 7 mm. For example, the height of the positioning protrusion along the axial direction of the disk body 10 can be 2 mm, 4 mm, 5 mm, 6 mm or 7 mm. Of course, the present invention does not limit this. The height of the positioning protrusion can be reasonably selected within the above range according to actual needs. In this way, it can be avoided that the height of the positioning protrusion is too small, for example, less than 2 mm, and cannot form an effective positioning match with the bare battery cell 300, and it can also be avoided that the height of the positioning protrusion is too large, for example, greater than 7 mm, causing unnecessary material waste.

[0053] like Figure 4As shown, taking the positioning protrusion as a truncated cone as an example, the diameter d0 of the bottom surface of the truncated cone (i.e., the end surface of the positioning protrusion along the axial direction away from the disk body 10) can be 2-5 mm, the diameter d1 of the bottom surface of the truncated cone (i.e., the end surface of the positioning protrusion along the axial direction close to the disk body 10) is 5-8 mm, and the height h of the truncated cone is 3-7 mm; Figure 8 As shown, taking the positioning protrusion as a hemispherical shape as an example, the diameter d2 of the positioning protrusion is 5-8 mm.

[0054] In some embodiments, the positioning structure 20 and the disk body 10 are integrally formed. For example, the connecting structure 30 and the disk body 10 are both made of metal materials, such as aluminum. In this case, the positioning structure 20 and the disk body 10 can be integrally cast. In this way, the processing technology of the collecting disk 100 is relatively simple.

[0055] Alternatively, the positioning structure 20 is welded to the disk body 10. In other words, the positioning structure 20 and the disk body 10 can be independently processed and formed, and then the positioning structure 20 and the disk body 10 are welded to form an integrated structure. In this way, the connection strength between the positioning structure 20 and the disk body 10 is higher.

[0056] In some other embodiments, the positioning structure 20 may be a non-metallic part. For example, the positioning structure 20 may be a plastic part. In this case, a mounting hole may be set in the middle of the disk body 10, and the positioning structure 20 may be embedded in the mounting hole. In this way, the assembly method of the positioning structure and the disk body 10 is relatively simple and easy to disassemble and assemble.

[0057] In some other examples, the collecting plate 100 is an aluminum plate, that is, the plate body 10 , the positioning structure 20 and the connecting structure 30 are all made of aluminum metal. In this way, the collecting plate 100 has good conductivity and is easy to be laser welded.

[0058] In some embodiments, the disk body 10 has a second surface facing away from the bare battery cell 300, and the connection structure 30 is formed as a connection boss protruding from the second surface. In this way, the connection structure 30 can increase the thickness of the welding portion between the disk body 10 and the pole 201, prevent the current collecting disk 100 and the pole 201 from being welded through, and ensure structural reliability.

[0059] In some embodiments, the connection structure 30 and the disk body 10 are integrally formed. For example, the connection structure 30 and the disk body 10 are both made of metal materials, such as aluminum. In this case, the connection structure 30 and the disk body 10 can be cast integrally. In this way, the processing technology of the collecting disk 100 is relatively simple.

[0060] Alternatively, the connection structure 30 is welded to the disk body 10. In other words, the connection structure 30 and the disk body 10 can be independently processed and then welded to form an integral structure, so that the connection strength between the connection structure 30 and the disk body 10 is high.

[0061] In some embodiments, in combination Figure 2 and Figure 8 A through hole 101 is provided in the middle of the disk body 10, and the connecting structure 30 and the positioning structure 20 are blocked at both ends of the through hole 101. At least part of the connecting structure 30 passes through the through hole 101 and is connected to the positioning structure 20, such as by welding, that is, the connecting structure 30 and the fixing structure jointly clamp the disk body 10. In this way, the overall structural strength of the disk body 10, the connecting structure 30 and the fixing structure is higher and the structure is more reliable.

[0062] Reference below Figure 1-Figure 8 A battery 400 according to an embodiment of the second aspect of the present invention is described.

[0063] The battery 400 of this embodiment may be a cylindrical battery, and includes a housing assembly 200, a bare battery cell 300, and the current collecting plate 100 in the above embodiment.

[0064] Specifically, the shell assembly 200 includes a receiving cavity, and the shell assembly 200 may include a shell 205 and a pole 201. One end of the shell 205 along the axial direction is a top plate, and the pole 201 may be inserted into the top plate and insulated with the shell 205. The pole 201 includes an assembly groove 202. The bare cell 300 is arranged in the receiving cavity, and the bare cell 300 includes a center hole 301. One end of the bare cell 300 includes a pole ear. The disc body 10 of the collector disc 100 is welded to the pole ear of the bare cell 300, and the positioning structure 20 is embedded in the center hole 301 to position and cooperate with the bare cell 300. The connection structure 30 extends into the assembly groove 202 and is electrically connected to the pole 201.

[0065] Specifically, when the current collecting plate 100 and the pole 201 are connected by welding such as laser welding, the current collecting plate 100 may be welded through due to the thin thickness of the plate body 10 of the current collecting plate 100, resulting in the problem of scrapping the battery 400. Therefore, the current collecting plate 100 of this embodiment is provided with a connecting structure 30 at the welding position between the current collecting plate 100 and the pole 201, and the connecting structure 30 can increase the overall thickness of the current collecting plate 100 at the welding position, thereby preventing the current collecting plate 100 from being welded through. In the case where the current collecting plate 100 is provided with the connection structure 30, on the one hand, since the thickness of the pole 201 itself is unchanged, it may be difficult for the energy of the laser welding equipment to quickly pass through the pole 201 to reach the current collecting plate, and on the other hand, the overall height of the current collecting plate 100 increases after being connected with the pole 201, and the space occupied inside the battery 400 increases. Therefore, in this embodiment, the assembly groove 202 is provided at the position corresponding to the pole 201 and the connection structure 30, and the connection structure 30 is extended into the assembly groove 202, and then the connection structure 30 is welded to the pole 201. In this way, the welding efficiency and welding quality of the current collecting plate 100 and the pole 201 can be guaranteed, and the internal space of the battery 400 occupied by the current collecting plate 100 and the pole 201 can be reduced. In addition, through the cooperation of the assembly groove 202 and the connection structure 30, the current collecting plate 100 and the pole 201 can also be formed into a limited matching state in the circumferential direction, so that the relative position of the two during the welding process is fixed to facilitate the welding operation.

[0066] The positioning structure 20 is arranged on the side of the disk body 10 facing the bare cell 300, and the positioning structure 20 is positioned and matched with the bare cell 300. Specifically, the bare cell 300 is formed by winding the positive electrode sheet, the diaphragm, and the negative electrode sheet after being stacked in sequence, that is, the bare cell 300 is a winding core. Usually, the wound bare cell 300 has a process hole, that is, a center hole 301, formed at the center position. The process hole can be used as a positioning and matching structure for the bare cell 300. The positioning structure 20 can be a positioning protrusion or other structure. The positioning protrusion can be embedded in the center hole 301 of the bare cell 300, thereby ensuring that the collector disk 100 and the bare cell 300 have good concentricity. In addition, the specific structure and position of the positioning and matching structure on the bare cell 300 and the positioning structure 20 on the collector disk 100 can be reasonably set according to actual needs. In this way, it can be ensured that during the welding process, the collector plate 100 is fixed relative to the end face of the bare cell 300 and is exactly in the target position so that the connection structure 30 and the assembly groove 202 of the pole 201 are accurately matched when the bare cell 300 is installed in the battery 400.

[0067] According to the battery 400 of the embodiment of the utility model, by setting the current collecting plate 100 of the above embodiment, the concentricity of the current collecting plate 100 and the bare battery cell 300 can be ensured, so that when the current collecting plate 100 and the bare battery cell 300 are put into the shell, the concentricity of the current collecting plate 100 and the pole 201 is ensured, and the current collecting plate 100 and the pole 201 can have sufficient welding area and high welding tensile force, which is beneficial to ensuring the current flow capacity of the welding position and the reliability of the battery 400.

[0068] In some embodiments, in order to facilitate welding of the connection structure 30 between the pole 201 and the collector plate 100, such as laser welding, a relief notch 203 can be provided at one end of the pole 201 facing away from the collector plate 100 in the axial direction. By providing the relief notch 203, the thickness of the pole 201 at the welding position is reduced. During welding, the welding equipment can be extended into the relief notch 203 to act on the bottom wall of the relief notch 203, so that the welding heat can be quickly transferred from the relief notch 203 side of the pole 201 to the side of the assembly groove 202, and then the heat can reach the collector plate 100, so as to smoothly complete the welding and ensure the welding quality. In addition, the housing assembly 200 can also include a plugging cover 204. After the collector plate 100 and the pole 201 are welded, the plugging cover 204 can be sealed in the relief notch 203, and the plugging cover 204 can be flush with the end face of the pole 201 or smoothly transition. This makes it easy to connect the pole 201 to an external circuit and also ensures the consistency of the appearance of the battery 400.

[0069] The electrical equipment of the third embodiment of the utility model is described below.

[0070] The power-consuming equipment of this embodiment may be a new energy vehicle, a communication base station, an energy storage container, etc. The power-consuming equipment may include the battery 400 in the above-mentioned embodiment.

[0071] Specifically, the electrical device may include a device body and a battery 400. The device body is provided with a battery compartment, and a power supply interface may be provided in the battery compartment. The battery 400 may be arranged in the battery compartment and electrically connected to the power supply interface. In this way, the battery 400 can supply power to the electrical device.

[0072] According to the electric equipment of the embodiment of the utility model, when the battery 400 in the above embodiment is adopted, the overall reliability is higher, which is beneficial to improving the user experience.

[0073] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0074] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0075] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0076] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A collector plate for connecting a bare cell and a pole of a battery, wherein the bare cell comprises a center hole and the pole comprises an assembly groove, characterized in that: include: Plate body; A connecting structure, the connecting structure is arranged on a side of the disk body facing the pole, at least a portion of the connecting structure extends into the assembly groove and is electrically connected to the pole; A positioning structure is provided on a side of the disk body facing the bare battery core, and the positioning structure is positioned and matched with the center hole.

2. The collecting plate according to claim 1, characterized in that: The connecting structure and the positioning structure are arranged opposite to each other along the axial direction of the disk body.

3. The collecting plate according to claim 2, characterized in that: The projection of the positioning structure in the reference plane is located within the projection of the connecting structure in the reference plane, The reference plane is perpendicular to the axis of the battery.

4. The collecting plate according to any one of claims 1 to 3, characterized in that: The disk body has a first surface facing the bare battery core, The positioning structure is formed as a positioning protrusion protruding from the first surface.

5. The collecting plate according to claim 4, characterized in that: The cross-sectional area of ​​the positioning protrusion gradually decreases in a direction along the axial direction of the disk body and away from the disk body.

6. The collecting plate according to claim 5, characterized in that: The projection of the positioning protrusion in the reference plane is circular.

7. The collecting plate according to any one of claims 1 to 3, 5 and 6, characterized in that: The positioning structure is integrally formed with the disk body; or, the positioning structure is welded to the disk body.

8. The collecting plate according to any one of claims 1 to 3, 5 and 6, characterized in that: The disk body has a second surface facing away from the bare battery core, and the connecting structure is formed as a connecting boss protruding from the second surface.

9. A battery, characterized in that: include: A housing assembly includes a receiving cavity, the housing assembly also includes a pole, and the pole includes an assembly groove; A bare battery cell, the bare battery cell is disposed in the accommodating cavity, the bare battery cell comprises a central hole, and one end of the bare battery cell comprises a pole ear; The current collecting disk according to any one of claims 1 to 8, wherein the disk body of the current collecting disk is welded to the pole ear, the positioning structure is embedded in the center hole to position and cooperate with the bare battery cell, and the connecting structure extends into the assembly groove and is welded to the pole.

10. An electrical device, characterized in that: include: The battery according to claim 9.

Images