Current collecting plate, battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a collector plate, a battery and electric equipment. The collector plate comprises a collector plate body; the flanging structure is arranged in the circumferential direction of the collector plate body and located on the radial outer side of the collector plate body; the multiple elastic connecting structures are arranged between the flow collecting plate body and the flanging structure and are arranged in the circumferential direction of the flow collecting plate body at intervals, each elastic connecting structure extends in the circumferential direction of the flow collecting plate body, and the two ends of each elastic connecting structure are connected with the flow collecting plate body and the flanging structure correspondingly; and a plurality of hollow structures are formed between the collector plate body and the flanging structure. According to the utility model, the elastic connecting structure is utilized to enable the current collecting plate body and the flanging structure to generate relative movement in the axial direction, so that a welding gap between the current collecting plate body and a tab is eliminated, the axial pulling force between the flanging structure and the current collecting plate body is counteracted, and short circuit of a battery cell caused by an explosion point phenomenon is prevented; and the stability and the safety of the battery are improved.

Description

Technical Field

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

[0002] With the application and promotion of new energy technologies, lithium battery products have developed rapidly. The safety and reliability of batteries during use have also become the focus of users' attention, which has put forward higher requirements for battery manufacturing processes. Taking large cylindrical batteries as an example, it is usually necessary to first put the battery cell into the shell, then weld the collector plate to the inner wall of the shell, and then weld the collector plate to the pole ear; however, at present, in the production process of major manufacturers, there are great difficulties in welding the collector plate and the pole ear. After the collector plate is welded to the inner wall of the shell, the height of the collector plate is fixed. At this time, there may be a gap between the collector plate and the pole ear, resulting in the formation of the molten pool during the subsequent welding process of the collector plate and the pole ear. It is easy to have a welding explosion point phenomenon, causing the battery cell to short-circuit and fail. Utility Model Content

[0003] In view of this, in order to improve at least one of the above problems existing in the prior art, the utility model provides a collecting plate, a battery and an electrical device.

[0004] The technical solution of the utility model provides a current collecting plate, comprising: a current collecting plate body; a flange structure, which is arranged around the circumference of the current collecting plate body and is located on the radial outside of the current collecting plate body; a plurality of elastic connection structures, which are arranged between the current collecting plate body and the flange structure, and are arranged at intervals in the circumferential direction of the current collecting plate body, each elastic connection structure extends along the circumferential direction of the current collecting plate body, and the two ends of each elastic connection structure are respectively connected to the current collecting plate body and the flange structure, so that a plurality of hollow structures are formed between the current collecting plate body and the flange structure.

[0005] In a feasible implementation, the flange structure is an annular structure and surrounds the collecting plate body along the circumference.

[0006] In a feasible implementation, the elastic connection structure includes: a main connecting plate, which extends along the circumference of the collecting disc body, and the main connecting plate is spaced apart from the collecting disc body and the flange structure on both sides in the radial direction; a first connecting portion, which is connected to one end of the main connecting plate, extends radially toward the collecting disc body, and is connected to the collecting disc body; a second connecting portion, which is connected to the other end of the main connecting plate, extends radially toward the flange structure, and is connected to the flange structure; wherein the elastic connection structure is suitable for undergoing elastic deformation in the axial direction.

[0007] In a feasible implementation, the main connecting plate is an arc-shaped structure; in the radial direction, a first hollow portion is formed between each main connecting plate and the collecting plate body, and a second hollow portion is formed between each main connecting plate and the flange structure; in the circumferential direction, a third hollow portion is formed between two adjacent elastic connecting structures, and the two ends of the third hollow portion are respectively connected to the adjacent first hollow portion and the second hollow portion to form a hollow structure.

[0008] In a feasible implementation, a central hole is provided on the collecting plate body;

[0009] and / or

[0010] A plurality of current collecting disc protrusion structures extending in the axial direction are arranged on the current collecting disc body, and the plurality of current collecting disc protrusion structures are arranged at intervals in the circumferential direction of the current collecting disc body.

[0011] In a feasible implementation, the number of the elastic connection structures is not less than three, and they are arranged at equal intervals in the circumferential direction, and the width W1 of the elastic connection structure is not less than 5 mm; and / or

[0012] The diameter D1 of the collecting plate body is not less than 32 mm.

[0013] In a feasible implementation, a flanged protrusion is provided on one side of the flanged structure away from the collector plate body; wherein a height H1 of the flanged protrusion is not less than 0.7 mm, and an overall height H2 of the collector plate is 1.2 mm to 1.4 mm; and / or

[0014] The thickness L1 of the flanged protrusion and the thickness L3 of the collector plate body are both 0.2 mm to 0.3 mm.

[0015] In a feasible implementation, the collecting plate body, the flange structure and the elastic connection structure are an integrally formed structure.

[0016] The second technical solution of the utility model provides a battery, comprising: a shell; a battery cell, arranged in the shell, and a pole ear is provided at the first end of the battery cell; the current collecting plate of any one of the above-mentioned first aspects is arranged opposite to the first end of the battery cell, the flange structure of the current collecting plate is located on the side of the current collecting plate away from the battery cell, and the outer side surface of the flange structure of the current collecting plate is connected to the inner wall surface of the shell, and the current collecting plate body of the current collecting plate is connected to the end face of the pole ear on the side facing the battery cell in the axial direction.

[0017] The third technical solution of the utility model provides an electrical device, including the battery in any one of the second aspects above.

[0018] The beneficial effects of the above technical solution of the utility model are embodied in:

[0019] The structural form of the current collecting plate is improved. An elastic connecting structure is provided between the current collecting plate body and the flange structure so that the elastic effect is utilized to enable the current collecting plate body and the flange structure to generate relative movement in the axial direction, so as to simultaneously meet the welding operations with the inner wall of the shell and the pole ear during the shell welding operation, eliminate the welding gap, offset the axial pulling force between the flange structure and the current collecting plate body, prevent the occurrence of explosion point phenomenon and cause short circuit of the battery cell, and help to improve the stability and safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure shows a top view of a current collecting plate provided by an embodiment of the utility model.

[0021] Figure 2 Shown Figure 1 AA section view of the collecting plate in FIG.

[0022] Figure 3 Shown is a cross-sectional view of a battery provided by an embodiment of the utility model.

[0023] Figure 4 The figure shows a top view of another current collecting plate provided by an embodiment of the utility model.

[0024] Figure 5 Shown Figure 4 BB section view of the collecting plate in FIG.

[0025] Figure 6 The figure shows a schematic block diagram of an electric device provided by an embodiment of the utility model.

[0026] in, Figure 3 The black triangles in the figure represent solder joints.

[0027] Description of reference numerals:

[0028] 100 collector plates;

[0029] 1 current collecting plate body, 11 center hole, 12 current collecting plate protrusion structure;

[0030] 2 flange structure, 21 flange bottom plate, 22 flange raised portion;

[0031] 3 elastic connection structure, 31 main connection piece, 32 first connection part, 33 second connection part, 35 hollow structure, 351 first hollow part, 352 second hollow part, 353 third hollow part;

[0032] 400 battery, 41 shell, 42 battery cell, 421 first end, 422 pole ear;

[0033] 500 electrical equipment. DETAILED DESCRIPTION

[0034] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0035] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 are within the scope of protection of this application.

[0037] Application Overview

[0038] With the application and promotion of new energy technologies, lithium battery products such as large cylindrical batteries have developed rapidly. Correspondingly, the safety and reliability of batteries during use have also become the focus of users' attention. Taking large cylindrical batteries as an example, in the production process, it is usually necessary to first perform the battery cell shelling operation, then weld the collector plate to the inner wall of the shell, and then weld the collector plate to the pole ear; however, in the existing production process, after the collector plate is welded to the inner wall of the shell, since the height of the collector plate is fixed, there may be a certain gap between the collector plate and the pole ear, which causes great difficulties in the welding operation of the collector plate and the pole ear. If the gap cannot be eliminated, it will cause the subsequent collector plate and the pole ear to form an extremely unstable molten pool during the welding process, and even a welding explosion point phenomenon will occur, which will lead to short-circuit failure of the battery cell and affect the stability and safety of the battery. Therefore, it is necessary to make targeted improvements to the above-mentioned difficulties in the prior art to overcome the corresponding technical defects.

[0039] Some embodiments of the current collecting plate, battery and electrical equipment in the technical solution of the utility model are provided below.

[0040] In one embodiment of the present invention, a current collecting plate 100 is provided. Figure 1 and Figure 2 As shown, the collector plate 100 includes a collector plate body 1, a flange structure 2 and an elastic connection structure 3. The flange structure 2 is located on the radial outer side of the collector plate body 1 and is arranged along the circumference of the collector plate body 1; in the radial direction, a certain gap is reserved between the flange structure 2 and the collector plate body 1, and the elastic connection structure 3 is arranged in the gap between the flange structure 2 and the collector plate body 1, and multiple elastic connection structures 3 are arranged at intervals in the circumferential direction of the collector plate body 1. Among them, each elastic connection structure 3 extends along the circumferential direction of the collector plate body 1, and in the circumferential direction, one end of the elastic connection structure 3 is connected to the collector plate body 1, and the other end is connected to the flange structure 2, so that a flexible connection is formed between the collector plate body 1 and the flange structure 2. The elastic connection structure 3 forms multiple hollow structures 35 between the collector plate body 1 and the flange structure 2, and in the axial direction of the collector plate body 1, the elastic deformation of the elastic connection structure 3 can be used to make the flange structure 2 produce axial movement relative to the collector plate body 1.

[0041] It is understandable that in the battery production process, such as Figure 3 In the example, the flange structure 2 needs to be welded and fixed to the inner wall of the shell, and the collector plate body 1 needs to be welded and fixed to the pole ear 422 on the battery cell 42. In the prior art, the collector plate usually adopts a rigid structure. After the welding with the inner wall of the shell is completed, it is easy to cause an axial gap between the welding end face of the collector plate and the pole ear, which affects the stability of the welding between the collector plate and the pole ear. In severe cases, a burst point phenomenon may even occur, resulting in a short circuit of the battery cell.

[0042] In the present embodiment, the structural form of the current collecting plate is improved by providing an elastic connecting structure 3 between the current collecting plate body 1 and the flange structure 2 so as to utilize the elastic effect to enable the current collecting plate body 1 and the flange structure 2 to generate relative movement in the axial direction, so as to simultaneously meet the welding operations with the inner wall of the shell and the pole ear during the shell welding operation, eliminate the welding gap, and offset the axial pulling force between the flange structure 2 and the current collecting plate body 1, thereby preventing the occurrence of a burst point phenomenon that causes a short circuit in the battery cell, which is beneficial to improving the stability and safety of the battery.

[0043] It should be noted that the battery in the present invention is not limited to a cylindrical battery. The flange structure 2 can be a continuous structure or a discontinuous structure arranged along the circumference. In practical applications, the collector plate is not limited to the negative collector plate, and the corresponding pole ear is not limited to the negative pole ear.

[0044] In addition, during the welding operation, the hollow structure 35 can effectively prevent the flange structure 2 or the current collecting plate body 1 from interfering with the elastic connection structure 3 .

[0045] In a further embodiment of the present invention, Figure 1 and Figure 2 As shown, the flange structure 2 specifically adopts an annular structure, and the flange structure 2 surrounds the circumference of the collector plate body 1 to radially cover the collector plate body 1. By providing a continuous annular structure, when welding into the shell, the welding surface of the flange structure 2 and the inner wall of the shell is an annular continuous welding surface, so that the overall force of the collector plate 100 is uniform, and the positioning during assembly is simpler and more convenient.

[0046] Preferably, if Figure 1 In the example in FIG. 1 , the collecting plate body 1 adopts a circular structure to match the annular structure of the flange structure 2 .

[0047] In a further embodiment of the present invention, Figures 1 to 3 As shown, the elastic connection structure 3 includes a main connection piece 31, a first connection part 32 and a second connection part 33. The main connection piece 31 extends along the circumference of the collector body 1, and in the circumferential direction, one end of the main connection piece 31 is provided with a first connection part 32, and the other end of the main connection piece 31 is provided with a second connection part 33; the first connection part 32 extends radially toward the collector body 1 and is connected to the collector body 1; the second connection part 33 extends radially toward the flange structure 2 and is connected to the flange structure 2. The connection between the flange structure 2 and the collector body 1 is realized by the main connection piece 31, the first connection part 32 and the second connection part 33, and the main connection piece 31, the first connection part 32 and the second connection part 33 can generate elastic deformation in the axial direction under the action of external force, so that the flange structure 2 and the collector body 1 generate relative movement in the axial direction. Among them, the main connection piece 31 is spaced from the collector body 1 and the flange structure 2 on both sides in the radial direction to form a hollow structure 35.

[0048] Furthermore, if Figure 1 and Figure 2As shown, the main connecting piece 31 specifically adopts an arc-shaped structure to match the shape of the collecting disc body 1 and the flange structure 2. The hollow structure 35 includes a first hollow portion 351, a second hollow portion 352 and a third hollow portion 353; the first hollow portion 351 and the second hollow portion 352 are respectively located on both sides of the main connecting piece 31 in the radial direction, and the first hollow portion 351 is formed between the main connecting piece 31 and the collecting disc body 1, and the second hollow portion 352 is formed between the main connecting piece 31 and the flange structure 2; the third hollow portion 353 is formed between two circumferentially adjacent elastic connecting structures 3, and the two ends of the third hollow portion 353 in the circumferential direction are respectively connected to the first hollow portion 351 and the second hollow portion 352 to form an integral hollow structure 35. As shown in FIG. Figure 1 In the example, in the circumferential direction, the first hollow portion 351 of any hollow structure 35 corresponds to the second hollow portion 352 of an adjacent hollow structure 35, and there is a main connecting piece 31 between the two; similarly, the second hollow portion 352 of any hollow structure 35 corresponds to the first hollow portion 351 of an adjacent hollow structure 35, and there is a main connecting piece 31 between the two.

[0049] Furthermore, if Figure 1 In the example, the number of the elastic connection structures 3 is not less than three, and the plurality of elastic connection structures 3 are arranged at equal intervals in the circumferential direction of the collector plate body 1, so that the plurality of hollow structures 35 are also arranged at equal intervals in the circumferential direction, for example Figure 1 The three elastic connection structures 3 shown in the figure form three hollow structures 35 arranged at intervals of 120 degrees, so that the force between the collecting plate body 1 and the flange structure 2 is more uniform, and the stability is stronger when axial movement occurs.

[0050] Preferably, if Figure 4 As shown, the width W1 of the elastic connection structure 3 is not less than 5 mm, and the width W1 is the width dimension of the elastic connection structure 3 in the radial direction of the collector plate body 1, that is, the spacing dimension between the first hollow portion 351 and the second hollow portion 352 in the radial direction of the collector plate body 1. Through the above-mentioned size setting, on the one hand, sufficient strength can be ensured to prevent breakage due to too small width, and on the other hand, sufficient flow area can be ensured.

[0051] Preferably, if Figure 4 As shown, the diameter D1 of the collector plate body 1 is not less than 32 mm, so as to ensure that the collector plate body 1 has enough area to be welded with the tab 422 of the battery cell 42 after the battery cell 42 is placed in the shell.

[0052] Furthermore, if Figure 1 and Figure 2As shown, a center hole 11 is provided on the collector plate body 1 to facilitate the grabbing and positioning of the collector plate during welding operation. Preferably, the diameter of the center hole 11 is in the range of 5mm to 7mm to match the positioning mechanism and minimize the area occupied by the collector plate body 1.

[0053] Furthermore, if Figure 1 and Figure 2 As shown, the collector plate body 1 is provided with a plurality of collector plate protrusion structures 12, each of which extends in the axial direction, and the plurality of collector plate protrusion structures 12 are arranged at intervals in the circumferential direction of the collector plate body 1. Preferably, the plurality of collector plate protrusion structures 12 are arranged at equal intervals in the circumferential direction of the collector plate body 1; the shapes of the collector plate protrusion structures 12 include but are not limited to hemispherical structures, rectangular structures, cylindrical structures, and other structural forms may also be adopted; the number of collector plate protrusion structures 12 is not limited to Figure 4 The six shown in the figure can also be provided with other numbers as required. By providing the collector plate protrusion structure 12 on the collector plate body 1, it acts as a reinforcing rib, improves the strength and rigidity of the collector plate body 1, prevents the collector plate body 1 from deforming during welding operation, and is conducive to further improving the welding accuracy and strength.

[0054] In a further embodiment of the present invention, Figures 1 to 5 As shown, a flanged protrusion 22 is provided on the side of the flanged structure 2 away from the collector body 1. The flanged protrusion 22 extends along the axial direction of the collector body 1, so that when welding with the inner wall of the shell, the flanged protrusion 22 is used to increase the contact area with the inner wall of the shell. Figure 3 In the example, the inner space of the flanged protrusion 22 is also used to reserve operating space for the welding mechanism to prevent mutual interference during the welding operation.

[0055] Furthermore, if Figure 4 As shown, the flange structure 2 also includes a flange bottom plate 21 located on the side of the flange protrusion 22 facing the collector plate body 1, the flange bottom plate 21 is connected to the bottom of the flange protrusion 22, and the flange bottom plate 21 is connected to the second connection part 33 of the elastic connection structure 3. Figure 5 In the example, by setting a flange bottom plate 21 on the inner side of the flange protrusion 22, the flange structure 2 as a whole forms a bending structure with an L-shaped cross-section, which is beneficial to further improve the strength of the flange structure 2 and is also convenient for connection and fixation with the elastic connection structure 3.

[0056] Preferably, if Figure 5 As shown, the height H1 of the flanged protrusion 22 is not less than 0.7 mm, and the overall height H2 of the collecting plate 100 is 1.2 mm to 1.4 mm, so as to reserve a sufficient area for the welding operation and facilitate the welding operation.

[0057] Preferably, if Figure 5 As shown, the thickness L1 of the flanged protrusion 22 and the thickness L3 of the collector plate body 1 are both 0.2 mm to 0.3 mm, which is consistent with the thickness of the collector plate commonly used in the prior art, and can be adapted to the existing battery cells and housings to prevent insufficient assembly space. Preferably, the flanged bottom plate 21 and the elastic connection structure 3 can be set to the same thickness as the collector plate body 1, which is convenient for processing on the one hand, and can also keep the elastic connection structure 3 suitable for flexibility and elasticity on the other hand.

[0058] Furthermore, in practical applications, the flange structure 2, the elastic connection structure 3 and the collector plate body 1 can be formed in one piece using the same material, which is easy to manufacture and can also omit the connection and fixing processing steps. Preferably, nickel-plated copper material can be used for processing and forming.

[0059] In one embodiment of the second aspect of the present invention, a battery 400 is provided. Figure 3 As shown, it includes a shell 41, a battery cell 42 and a current collecting plate 100 in any of the above embodiments. The battery cell 42 and the current collecting plate 100 are both arranged in the shell 41; the first end 421 of the battery cell 42 is provided with a pole ear 422, and the current collecting plate 100 is arranged opposite to the first end 421 of the battery cell 42; the flange structure 2 of the current collecting plate 100 is located on the side of the current collecting plate 100 away from the battery cell 42, and the outer side surface of the flange structure 2 of the current collecting plate 100 is connected to the inner wall surface of the shell 41, and the current collecting plate body 1 of the current collecting plate 100 is connected to the end surface of the pole ear 422 of the battery cell 42 on the side facing the battery cell 42 in the axial direction. Preferably, the current collecting plate body 1 and the pole ear 422, and the flange structure 2 and the inner wall surface of the shell 41 are connected and fixed by laser penetration welding.

[0060] During the processing, after the flange structure 2 is welded and fixed to the inner wall surface of the shell 41, if there is an axial distance between the collecting plate body 1 and the pole lug 422, the axial distance between the collecting plate body 1 and the pole lug 422 can be eliminated by applying an external force to utilize the elastic deformation of the elastic connection structure 3 in the axial direction, thereby offsetting the axial pulling force between the collecting plate body 1 and the flange structure 2, so that the molten pool can remain stable when the collecting plate body 1 and the pole lug 422 are welded, preventing the occurrence of explosion points, which is beneficial to improving the stability and safety of the battery 400.

[0061] Preferably, the shell 41 is a steel shell or an aluminum shell with a cylindrical structure, the collecting plate 100 is a disc-shaped structure adapted to the shell 41, and the battery cell 42 is a cylindrical structure, so that a cylindrical battery is formed after assembly.

[0062] It should be noted that the battery 400 in this embodiment includes but is not limited to the cylindrical battery described above. In addition, the battery 400 in this embodiment is not limited to a lithium battery.

[0063] In addition, the battery 400 in this embodiment has all the beneficial effects of the current collecting plate 100 in any of the above embodiments, which will not be described in detail here.

[0064] The following is a specific embodiment of the battery 400 of the present invention.

[0065] like Figures 1 to 5 As shown, the battery 400 is specifically a cylindrical battery, wherein the shell 41 is a cylindrical structure, the current collecting plate 100 is a disc-shaped structure, the battery cell 42 is a cylindrical structure, and the current collecting plate 100 is arranged corresponding to the first end 421 of the battery cell 42 in the axial direction, and the battery cell 42 is located below the current collecting plate 100 in the axial direction. The flange structure 2 of the current collecting plate 100 is an annular structure, including a flange bottom plate 21 and a flange protrusion 22, the flange protrusion 22 is located on the side of the flange bottom plate 21 away from the current collecting plate body 1 (radially outward), and extends in the axial direction away from the battery cell 42; the flange protrusion 22 is a continuous annular structure in the circumferential direction. A center hole 11 is opened at the center position of the current collecting plate body 1, and six current collecting plate protrusion structures 12 are arranged on the side of the current collecting plate body 1 away from the battery cell 42, and the six current collecting plate protrusion structures 12 are arranged at equal intervals around the center hole 11.

[0066] Among them, Figure 4 and Figure 5 In the example, the diameter D1 of the collecting plate body 1 is not limited to 32 mm, the diameter of the center hole 11 is 5 mm to 7 mm, the thickness L3 of the collecting plate body 1, the thickness of the elastic connection structure 3 and the thickness L2 of the flange bottom plate 21 are all 0.2 mm to 0.3 mm, the thickness L1 of the flange protrusion 22 in the radial direction is also 0.2 mm to 0.3 mm, the height H1 of the flange protrusion 22 is not less than 0.7 mm, and the overall height H2 of the collecting plate 100 is 1.2 mm to 1.4 mm.

[0067] Before the laser penetration welding operation, the battery cell 42 enters the interior of the shell 41, with the first end 421 of the battery cell 42 facing upward, and the collector plate 100 is placed on the end face of the pole lug 422 of the battery cell 42; when the laser penetration welding is performed, the flanged protrusion 22 of the flanged structure 2 is first welded to the interior of the shell 41, at which time the height of the collector plate 100 in the shell 41 has been determined, and then the pressing mechanism is used to apply downward pressure to the collector plate body 1, so that the welding end face of the collector plate body 1 fits with the end face of the pole lug 422, and then the collector plate body 1 and the pole lug 422 are welded. Since the elastic connection structure 3 is flexible and elastic, it can eliminate the gap between the welding end face of the collector plate body 1 and the end face of the pole lug 422, and can effectively prevent the generation of explosion points due to the existence of the gap during welding, thereby greatly improving the reliability of the welding operation and product quality, and also greatly reducing the difficulty of positioning during the welding operation, which is conducive to improving production efficiency.

[0068] In an embodiment of the third aspect of the present utility model, an electric device 500 is provided, such as Figure 6 As shown, the electric device 500 includes the battery 400 in any embodiment of the second aspect described above, so that the electric device 500 is powered by the battery 400 .

[0069] In addition, the electric device 500 in this embodiment has all the beneficial effects of the battery 400 in any of the above embodiments, which will not be described in detail here.

[0070] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0071] The block diagrams of the devices, apparatuses, equipment and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to" and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to" and can be used interchangeably with them. It should also be noted that in the apparatus and equipment of the present utility model, each component can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present utility model.

[0072] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the utility model. Therefore, the utility model is not intended to be limited to the aspects shown herein, but in accordance with the widest range consistent with the principles and novel features of this utility model.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A collecting plate, characterized in that: include: The collecting plate body (1); A flange structure (2) is arranged around the circumference of the current collecting disc body (1) and is located radially outside the current collecting disc body (1); A plurality of elastic connection structures (3) are arranged between the current collecting disc body (1) and the flange structure (2), and are spaced apart in the circumferential direction of the current collecting disc body (1); each of the elastic connection structures (3) extends along the circumferential direction of the current collecting disc body (1), and the two ends of each of the elastic connection structures (3) are respectively connected to the current collecting disc body (1) and the flange structure (2), so that a plurality of hollow structures (35) are formed between the current collecting disc body (1) and the flange structure (2).

2. The collecting plate according to claim 1, characterized in that: The flange structure (2) is an annular structure and surrounds the collecting plate body (1) along the circumference.

3. The collecting plate according to claim 2, characterized in that: The elastic connection structure (3) comprises: A main connecting piece (31) extends along the circumferential direction of the current collecting disc body (1), and the main connecting piece (31) is spaced apart from the current collecting disc body (1) and the flange structure (2) on both sides in the radial direction; A first connection portion (32) connected to one end of the main connection piece (31), the first connection portion (32) extending radially toward the current collecting disc body (1) and connected to the current collecting disc body (1); A second connecting portion (33) connected to the other end of the main connecting piece (31), the second connecting portion (33) extending radially toward the flange structure (2) and connected to the flange structure (2); Wherein, the elastic connection structure (3) is suitable for elastic deformation in the axial direction.

4. The collecting plate according to claim 3, characterized in that: The main connecting piece (31) is an arc-shaped structure; In the radial direction, a first hollow portion (351) is formed between each of the main connecting pieces (31) and the current collecting plate body (1), and a second hollow portion (352) is formed between each of the main connecting pieces (31) and the flange structure (2); In the circumferential direction, a third hollow portion (353) is formed between two adjacent elastic connection structures (3), and two ends of the third hollow portion (353) are respectively connected to the adjacent first hollow portion (351) and the second hollow portion (352), thereby forming the hollow structure (35).

5. The collecting plate according to claim 3, characterized in that: The collecting plate body (1) is provided with a central hole (11); and / or The collecting disc body (1) is provided with a plurality of collecting disc protrusion structures (12) extending in the axial direction, and the plurality of collecting disc protrusion structures (12) are arranged at intervals in the circumferential direction of the collecting disc body (1).

6. The collecting plate according to claim 3, characterized in that: The number of the elastic connection structures (3) is not less than three and they are arranged at equal intervals in the circumferential direction, and the width W1 of the elastic connection structures (3) is not less than 5 mm; and / or The diameter D1 of the collecting plate body (1) is not less than 32 mm.

7. The collecting plate according to claim 3, characterized in that: A flanged protrusion (22) is provided on a side of the flanged structure (2) away from the current collecting plate body (1); Wherein, the height H1 of the flanged protrusion (22) is not less than 0.7 mm, and the overall height H2 of the collecting plate is 1.2 mm to 1.4 mm; and / or The thickness L1 of the flanged protrusion (22) and the thickness L3 of the current collecting plate body (1) are both 0.2 mm to 0.3 mm.

8. The collector plate according to any one of claims 1 to 7, characterized in that: The collecting plate body (1), the flange structure (2) and the elastic connection structure (3) are an integrally formed structure.

9. A battery, characterized in that: include: Housing (41); A battery cell (42) is disposed in the housing (41), and a first end (421) of the battery cell (42) is provided with a pole ear (422); The current collecting disk as described in any one of claims 1 to 8 is arranged opposite to the first end (421) of the battery cell (42), the flange structure (2) of the current collecting disk is located on the side of the current collecting disk away from the battery cell (42), and the outer side surface of the flange structure (2) of the current collecting disk is connected to the inner wall surface of the shell (41), and the current collecting disk body (1) of the current collecting disk is connected to the end surface of the pole ear (422) on the side facing the battery cell (42) in the axial direction.

10. An electrical device, characterized in that: include: The battery as claimed in claim 9.

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