Tab shaping mechanism and battery production system

Abstract

The utility model provides a tab shaping mechanism and a battery production system. The tab shaping mechanism comprises a driving part and a shaping assembly. The shaping assembly is connected to the driving part, the driving part is used for driving the shaping assembly to ascend and descend, the shaping assembly comprises a first pressing plate and a second pressing plate which are arranged in the first direction, and the first direction is perpendicular to the ascending and descending direction of the shaping assembly. The first pressing plate comprises a first shaping surface used for abutting against the tab, the second pressing plate comprises a second shaping surface used for abutting against the tab, the first shaping surface is arranged on the side, away from the second pressing plate, of the first pressing plate, and the second shaping surface is arranged on the side, away from the first pressing plate, of the second pressing plate. The first pressing plate and the second pressing plate are configured to be capable of moving relatively so as to change the maximum distance between the first shaping face and the second shaping face in the first direction. The reliability of the battery monomer can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a tab shaping mechanism and a battery production system. Background Art

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] In the development of battery technology, how to improve the reliability of battery cells has always been a research direction in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a tab shaping mechanism and a battery production system, which can improve the reliability of battery cells.

[0005] In a first aspect, the present application provides a tab shaping mechanism, which includes a driving member and a shaping assembly. The shaping assembly is connected to the driving member, which is used to drive the shaping assembly to rise and fall, and the shaping assembly includes a first pressing plate and a second pressing plate arranged along a first direction, and the first direction is perpendicular to the lifting direction of the shaping assembly. The first pressing plate includes a first shaping surface for abutting against the tab, and the second pressing plate includes a second shaping surface for abutting against the tab. The first shaping surface is arranged on a side of the first pressing plate away from the second pressing plate, and the second shaping surface is arranged on a side of the second pressing plate away from the first pressing plate. The first pressing plate and the second pressing plate are configured to be able to move relative to each other to change the maximum spacing between the first shaping surface and the second shaping surface along the first direction.

[0006] In the above scheme, by setting the first pressure plate and the second pressure plate, the first shaping surface and the second shaping surface can increase or decrease the maximum spacing between the first shaping plate and the second shaping surface along the first direction as the first pressure plate and the second pressure plate move relative to each other, thereby reducing the possibility of the shaping assembly scratching the pole ear during the descent process, while increasing the shaping area of ​​the pole ear and improving the reliability of the battery cell.

[0007] In some embodiments, the first pressing plate further includes a third shaping surface for abutting against the pole lug, the second pressing plate includes a fourth shaping surface for abutting against the pole lug, the third shaping surface is located on one side of the first pressing plate along the lifting direction, and the fourth shaping surface is located on one side of the second pressing plate along the lifting direction. The first pressing plate and the second pressing plate are configured to be relatively movable to change the maximum spacing between the third shaping surface and the fourth shaping surface along the first direction.

[0008] In the above scheme, the third shaping surface and the fourth shaping surface are set to shape the pole ear, and the third shaping surface and the fourth shaping surface can change the maximum spacing in the first direction, thereby increasing the shaping area of ​​the pole ear by the third shaping surface and the fourth shaping surface, reducing the risk of the pole ear being inserted into the pole piece and causing a short circuit due to the excessive length of the pole ear root due to insufficient shaping area, thereby improving the reliability of the battery cell.

[0009] In some embodiments, the first pressure plate and the second pressure plate are configured to be relatively translatable along a first direction.

[0010] In the above scheme, the above setting is helpful to reduce the control difficulty of the first pressure plate and the second pressure plate, improve the control accuracy of the translation distance of the first pressure plate and the second pressure plate, thereby improving the preparation yield of the tab and improving the reliability of the battery cell.

[0011] In some embodiments, the first pressing plate includes a first guiding structure, and the first guiding structure is used to cooperate with the external component so that the first pressing plate can be translated under the action of the external component.

[0012] In the above scheme, by providing the first guiding structure, it is helpful to simplify the overall structure of the first pressing plate, reduce the preparation cost of the first pressing plate, and improve the preparation efficiency of the first pressing plate for shaping the pole lug.

[0013] In some embodiments, the first guide structure includes a first guide groove, and the first guide groove is formed by a depression of one side of the first pressing plate toward the second pressing plate.

[0014] In the above solution, by providing the first guide groove, it is helpful to improve the stability and accuracy of the translational movement of the first pressing plate along the first direction, simplify the overall structure of the first pressing plate, and reduce the preparation cost of the first pressing plate.

[0015] In some embodiments, the second pressing plate includes a second guiding structure, and the second guiding structure is used to cooperate with an external component so that the second pressing plate can be translated under the action of the external component.

[0016] In the above scheme, by providing the second guiding structure, it is helpful to simplify the overall structure of the second pressing plate, reduce the preparation cost of the second pressing plate, and improve the preparation efficiency of the second pressing plate for shaping the pole lug.

[0017] In some embodiments, the second guide structure includes a second guide groove, and the second guide groove is formed by a depression of one side of the second pressing plate toward the first pressing plate.

[0018] In the above scheme, by providing the second guide groove, it is beneficial to improve the stability and accuracy of the translational movement of the second pressing plate along the first direction, simplify the overall structure of the second pressing plate, and reduce the preparation cost of the second pressing plate.

[0019] In some embodiments, the first pressing plate includes a first guiding structure, the first guiding structure includes a first guiding groove, and the first guiding groove and the second guiding groove are combined to form a guiding hole.

[0020] In the above scheme, through the above setting, it is beneficial to enable the first guide groove and the second guide groove to move using the same external component, and the first guide groove and the second guide groove can also be prepared and formed through a preparation process, thereby simplifying the structure of the preparation equipment used in the production process and reducing the preparation cost.

[0021] In some embodiments, the first pressure plate and the second pressure plate are configured to be rotatably connected.

[0022] In the above scheme, the above setting is helpful to increase the flexibility and application scope of the shaping component and improve the shaping accuracy and efficiency.

[0023] In some embodiments, the shaping assembly further includes a rotation shaft, the rotation shaft is located between the first pressing plate and the second pressing plate, and the first pressing plate and the second pressing plate are both rotatably connected relative to the rotation shaft.

[0024] In the above scheme, the flexibility of the shaping component is increased through the above arrangement, and the first pressing plate and the second pressing plate can shape the tab at the same time, thereby improving the shaping efficiency.

[0025] In some embodiments, the driving member and the shaping assembly are connected by a connecting member. The first pressing plate includes a first holding portion and a first connecting portion connected to each other, the first holding portion is provided with a third shaping surface on one side along the lifting direction, the first connecting portion is provided with a first guide portion, and the first guide portion is movably connected to the connecting member. The second pressing plate includes a second holding portion and a second connecting portion connected to each other, the second holding portion is provided with a fourth shaping surface on one side along the lifting direction, the second connecting portion is provided with a second guide portion, and the second guide portion is movably connected to the connecting member.

[0026] In the above scheme, the first guide part and the second guide part are provided to limit the rotation angle of the first pressure plate and the second pressure plate, thereby improving the control accuracy of the shaping component, simplifying the overall structure of the first pressure plate and the second pressure plate, and reducing the preparation cost.

[0027] In some embodiments, the first guide portion includes a first guide groove, the second guide portion includes a second guide groove, the connecting member includes a first follower portion and a second follower portion, the first follower portion and the first guide groove are movably connected, and the second follower portion and the second guide groove are movably connected. In the direction from the first holding portion to the first connecting portion, the spacing between the first guide groove and the second guide groove along the first direction gradually increases.

[0028] In the above scheme, the above arrangement is helpful to improve the accuracy of controlling the rotation angle of the first pressing plate and the second pressing plate, simplify the overall structure of the shaping assembly, and improve the shaping efficiency of the tab shaping mechanism for the tab.

[0029] In some embodiments, the shaping assembly further includes a plurality of elastic members, and the plurality of elastic members are disposed on opposite sides of the first pressing plate and the second pressing plate.

[0030] In the above scheme, by providing the elastic member, it is helpful to improve the recovery speed of the shaping component after the shaping is completed, improve the preparation speed of the tab shaping mechanism, and improve the production efficiency.

[0031] In a second aspect, an embodiment of the present application provides a battery production system, the battery production system comprising a carrier plate, a tab shaping mechanism, and a welding device. The carrier plate is used to carry an electrode assembly and an adapter, and the electrode assembly includes a tab. A tab shaping mechanism such as any of the above embodiments. The welding device is used to weld the tab and the adapter.

[0032] In some embodiments, the supporting plate includes a guide component arranged on the side facing the pole ear, and the guide component is used to cooperate with at least one of the first guide structure of the first pressure plate and the second guide structure of the second pressure plate to enable at least one of the first pressure plate and the second pressure plate to translate under the action of the guide structure.

[0033] In the above scheme, the first pressure plate and the second pressure plate realize translational movement by contacting with the guide component during the descending process, thereby simplifying the overall structure of the first pressure plate and the second pressure plate, simplifying the overall structure of the supporting plate, and reducing the preparation cost of the supporting plate.

[0034] In some embodiments, the guide component includes a guide column, a first guide structure and a second guide structure enclosed to form a guide hole, and the radial dimension of at least part of the guide column gradually decreases in the direction of the shaping component pointed by the supporting plate, and the maximum radial dimension of the guide column is larger than the radial dimension of the guide hole.

[0035] In the above scheme, through the above arrangement, the overall structure of the guide component is further simplified, so that the first pressing plate and the second pressing plate can translate synchronously, thereby improving the shaping efficiency and improving the production efficiency.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 is a structural schematic diagram of a battery production system provided in an embodiment of the present application;

[0039] Figure 2 is a structural schematic diagram of another battery production system provided in an embodiment of the present application;

[0040] Figure 3 It is a structural schematic diagram of a tab shaping mechanism provided in an embodiment of the present application;

[0041] Figure 4 It is a structural schematic diagram of another tab shaping mechanism provided in an embodiment of the present application;

[0042] Figure 5 is a structural schematic diagram of another battery production system provided in an embodiment of the present application;

[0043] Figure 6 is a structural schematic diagram of another battery production system provided in an embodiment of the present application;

[0044] Figure 7 It is a structural schematic diagram of another tab shaping mechanism provided in an embodiment of the present application;

[0045] Figure 8 It is a structural schematic diagram of another tab shaping mechanism provided in an embodiment of the present application.

[0046] Marking Description

[0047] 100, tab shaping mechanism; 200, electrode assembly; 210, electrode body; 220, tab; 220a, tab root; 220b, tab free end; 300, bearing plate; 310, first bearing part; 320, second bearing part; 330, guide member; 400, adapter;

[0048] 10. Driving parts;

[0049] 20. shaping assembly; 21. first pressing plate; 211. first shaping surface; 212. third shaping surface; 213. first guide groove; 214. first pressing portion; 215. third pressing portion; 216. first connecting portion; 217. first guide groove; 22. second pressing plate; 221. second shaping surface; 222. fourth shaping surface; 223. second guide groove; 224. second pressing portion; 225. fourth pressing portion; 226. second connecting portion; 227. second guide groove; 23. rotating shaft;

[0050] 30. Connecting member; 31. First follower; 32. Second follower;

[0051] 40. elastic member; H. guide hole; 50. welding port;

[0052] X, first direction; Z, lifting direction. DETAILED DESCRIPTION

[0053] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0056] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments 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.

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0059] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0062] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0063] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0064] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0065] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0066] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0067] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0068] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0069] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0070] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0071] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0072] From the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0073] The development of battery technology must consider many design factors at the same time, such as battery life, energy density, discharge capacity, charge and discharge rate and other performance parameters. In addition, the reliability of the battery must also be considered. However, the reliability of current batteries is poor.

[0074] During the battery production process, the pole tabs need to be welded to other components, for example, the pole tabs need to be welded to adapters. When welding, the pole tabs are first pressed together with a pressing plate, and then the pole tabs and other components are welded together with a welding device. If the size of the pressing plate is designed to be larger, the pressing plate may scratch the pole tabs during the pressing process, causing the pole tabs to break or even the pole tab coating to fall off; if the size of the pressing plate is designed to be smaller, some areas of the pole tabs may not be shaped by the pressing plate, and there is a risk that the pole tabs may be inserted into the pole pieces and cause a short circuit. However, the existing pressing plates are of fixed size and cannot take into account and solve the above problems at the same time, resulting in partial defects in the pole tabs, which affects the reliability of the battery cells.

[0075] Based on the above technical problems, the present application provides a technical solution, which, by setting a first pressure plate and a second pressure plate, can increase or decrease the maximum spacing between the first shaping plate and the second shaping surface along the first direction as the first pressure plate and the second pressure plate move relative to each other, thereby reducing the possibility of the shaping assembly scratching the pole ear during the descent process, while increasing the shaping area of ​​the pole ear and improving the reliability of the battery cell.

[0076] Figure 1 It is a structural schematic diagram of a battery production system provided in an embodiment of the present application. Figure 2 It is a structural schematic diagram of another battery production system provided in an embodiment of the present application.

[0077] See also Figure 1 and Figure 2 The embodiment of the present application provides a tab shaping mechanism 100, which includes a driving member 10 and a shaping assembly 20. The shaping assembly 20 is connected to the driving member 10, and the driving member 10 is used to drive the shaping assembly 20 to rise and fall. The shaping assembly 20 includes a first pressing plate 21 and a second pressing plate 22 arranged along a first direction X, and the first direction X is perpendicular to the lifting direction Z of the shaping assembly 20. The first pressing plate 21 includes a first shaping surface 211 for abutting against the tab 220, and the second pressing plate 22 includes a second shaping surface 221 for abutting against the tab 220. The first shaping surface 211 is arranged on a side of the first pressing plate 21 away from the second pressing plate 22, and the second shaping surface 221 is arranged on a side of the second pressing plate 22 away from the first pressing plate 21. The first pressing plate 21 and the second pressing plate 22 are configured to be relatively movable to change the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X.

[0078] The electrode assembly 200 includes a positive electrode sheet, a negative electrode sheet and a separator. The separator separates the positive electrode sheet and the negative electrode sheet to avoid short circuit. Taking the negative electrode sheet as an example, the negative electrode sheet includes a substrate and an active material coated on at least one side of the substrate, and the uncoated portion of the substrate forms a pole ear 220. In the electrode assembly 200 formed by winding or stacking, the multi-layer pole ear 220 portions led out from the negative electrode sheet form a pole ear 220 with a negative polarity, and similarly, the multi-layer pole ear 220 portions led out from the positive electrode sheet form a pole ear 220 with a positive polarity. The multi-layer pole ear 220 portions are stacked in sequence in the thickness direction of the electrode assembly 200 before being gathered. After the multi-layer pole ear 220 portions are gathered, a part of the multi-layer pole ear 220 portions is close to each other and abutted together, and the gathered multi-layer pole ear 220 portions and the adapter are welded by a welding device. Then, the welded pole ear 220 is bent to form a C-shaped structure. The tab shaping mechanism 100 is used to gather and shape the tab 220 .

[0079] Optionally, the tab shaping mechanism 100 may include a first state, a second state, and a third state. During the process of switching from the first state to the second state, the driver 10 drives the shaping assembly 20 to approach the tab 220, and the first pressing plate 21 and the second pressing plate 22 do not move relative to each other. During the process of switching from the second state to the third state, the driver 10 may continue to drive the shaping assembly 20 to approach the tab 220, and the first pressing plate 21 and the second pressing plate 22 move relative to each other, so that the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X increases. When in the third state, the driver 10 drives the shaping assembly 20 to move to a preset position, and the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X increases to a maximum, and the shaping assembly 20 shapes the tab 220.

[0080] Similarly, after the shaping of the pole ear 220 is completed, the third state is converted to the second state, and during the conversion process, the driver 10 drives the shaping assembly 20 away from the pole ear 220, and the first pressing plate 21 and the second pressing plate 22 move relative to each other, so that the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X is reduced. When in the second state, the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X is reduced to a minimum. During the conversion from the second state to the first state, the driver 10 continues to drive the shaping assembly 20 away from the pole ear 220.

[0081] Exemplarily, taking the example of the driving member 10 driving the shaping assembly 20 to descend close to the pole ear 220, before the driving member 10 drives the shaping assembly 20 to descend, the first shaping surface 211 and the second shaping surface 221 are in an initial state; when the driving member 10 drives the shaping assembly 20 to descend to a preset position, the first pressing plate 21 and the second pressing plate 22 move relative to each other, so that the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X increases and the pole ear 220 is shaped. In some embodiments, when the driving member 10 drives the shaping assembly 20 to descend to the first preset position, the first pressing plate 21 and the second pressing plate 22 do not move relative to each other, so as to reduce the possibility of the shaping assembly 20 scratching the pole ear 220. When the driver 10 drives the shaping assembly 20 to descend from the first preset position to the second preset position, the first pressing plate 21 and the second pressing plate 22 move relative to each other, so that the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X gradually increases to the preset size, thereby shaping the pole ear 220. After the pole ear 220 is folded and shaped, the driver 10 drives the shaping assembly 20 to rise away from the pole ear 220. When the driver 10 drives the shaping assembly 20 to rise from the preset position, the first pressing plate 21 and the second pressing plate 22 move relative to each other, so that the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X gradually decreases until the initial state is restored, so as to reduce the possibility of the shaping assembly 20 scratching the pole ear 220.

[0082] The shaping assembly 20 includes a first pressing plate 21 and a second pressing plate 22 arranged along a first direction X, the first pressing plate 21 and the second pressing plate 22 are arranged side by side along the first direction X, and the first pressing plate 21 and the second pressing plate 22 are both lifted and lowered under the drive of the driving member 10. Optionally, the first pressing plate 21 and the second pressing plate 22 are lifted and lowered simultaneously.

[0083] Optionally, the electrode assembly 200 includes two electrode bodies 210 of the two electrode assemblies 200, which are arranged opposite to each other along the first direction X, and the two tabs 220 of the two electrode assemblies 200 are located between the two electrode bodies 210. The two negative tabs 220 of the two electrode assemblies 200 are shaped by the first pressing plate 21 and the second pressing plate 22, respectively. Similarly, the two positive tabs 220 of the two electrode assemblies 200 are shaped by the first pressing plate 21 and the second pressing plate 22, respectively.

[0084] Exemplarily, the first shaping surface 211 is used to shape the root of the tab 220 so that the tabs 220 are folded. Similarly, the second shaping surface 221 is used to shape the root of the tab 220. The first shaping surface 211 and the second shaping surface 221 can shape two tabs 220 respectively.

[0085] Optionally, the size of the first pressing plate 21 along the first direction X and the size of the second pressing plate 22 along the first direction X may be the same.

[0086] The first shaping surface 211 is disposed on the side of the first pressing plate 21 away from the second pressing plate 22, and the shape and size of the first shaping surface 211 can be adjusted according to the design requirements of the tab 220. Optionally, the first shaping surface 211 can be a flat surface, or the first shaping surface 211 is formed by splicing a plurality of intersecting surfaces.

[0087] The second shaping surface 221 is disposed on the side of the second pressing plate 22 away from the first pressing plate 21, and the shape and size of the second shaping surface 221 can be adjusted according to the design requirements of the tab 220. Optionally, the second shaping surface 221 can be a flat surface, or the second shaping surface 221 is formed by splicing a plurality of intersecting surfaces.

[0088] The first pressing plate 21 and the second pressing plate 22 are configured to be relatively movable to change the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X. It can be understood that the first pressing plate 21 and the second pressing plate 22 can be translated along a single direction to move the first pressing plate 21 and the second pressing plate 22 toward each other or away from each other; or the first pressing plate 21 and the second pressing plate 22 can be relatively rotated to move the first shaping surface 211 and the second shaping surface 221 closer to each other or farther away from each other. Optionally, the first pressing plate 21 and the second pressing plate 22 can be rotated by the same rotating shaft 23. Of course, the first pressing plate 21 and the second pressing plate 22 can also be independently rotated by different rotating shafts 23.

[0089] In the embodiment of the present application, by setting the first pressure plate 21 and the second pressure plate 22, the first shaping surface 211 and the second shaping surface 221 can increase or decrease the maximum spacing between the first shaping plate and the second shaping surface 221 along the first direction X as the first pressure plate 21 and the second pressure plate 22 move relative to each other, thereby reducing the possibility of the shaping assembly 20 scratching the pole ear 220 during the descent process, while increasing the shaping area of ​​the pole ear 220 and improving the reliability of the battery cell.

[0090] Figure 3 It is a structural schematic diagram of a tab shaping mechanism provided in an embodiment of the present application. Figure 4 It is a structural schematic diagram of another tab shaping mechanism provided in an embodiment of the present application. Figure 3 , Figure 4 , Figure 7 as well as Figure 8 The drive member 10 is not shown.

[0091] In some optional embodiments, see Figures 1 to 4The first pressing plate 21 further includes a third shaping surface 212 for abutting against the pole ear 220, and the second pressing plate 22 includes a fourth shaping surface 222 for abutting against the pole ear 220. The third shaping surface 212 is located on one side of the first pressing plate 21 along the lifting direction Z, and the fourth shaping surface 222 is located on one side of the second pressing plate 22 along the lifting direction Z. The first pressing plate 21 and the second pressing plate 22 are configured to be relatively movable to change the maximum spacing between the third shaping surface 212 and the fourth shaping surface 222 along the first direction X.

[0092] The pole tab 220 may include a pole tab free end 220b and a pole tab root 220a, the pole tab free end 220b is connected to the electrode body 210 via the pole tab root 220a, the third shaping surface 212 and the fourth shaping surface 222 are both used to shape the pole tab free end 220b, and the third shaping surface 212 and the fourth shaping surface 222 can shape the two pole tab free ends 220b respectively.

[0093] Optionally, the third shaping surface 212 and the first shaping surface 211 are arranged to intersect.

[0094] Optionally, the fourth shaping surface 222 and the second shaping surface 221 are arranged to intersect.

[0095] Optionally, in the first state, the first pressing plate 21 and the second pressing plate 22 are arranged in contact with each other along the first direction X. When the driving member 10 drives the shaping assembly 20 to descend to the preset position to shape the pole ear 220, the third shaping surface 212 of the first pressing plate 21 and the fourth shaping surface 222 of the second pressing plate 22 can move in opposite directions respectively, so that the maximum spacing between the side edge of the third shaping surface 212 facing away from the fourth shaping surface 222 along the first direction X and the side edge of the fourth shaping surface 222 facing away from the third shaping surface 212 along the first direction X increases. Of course, in the first state, the first pressing plate 21 and the second pressing plate 22 can also be arranged at intervals along the first direction X.

[0096] The first pressing plate 21 and the second pressing plate 22 are configured to be relatively movable to change the maximum spacing between the third shaping surface 212 and the fourth shaping surface 222 along the first direction X. It can be understood that the first pressing plate 21 and the second pressing plate 22 can be translated along a single direction to move the first pressing plate 21 and the second pressing plate 22 toward each other or away from each other; or the first pressing plate 21 and the second pressing plate 22 can be relatively rotated to make the third shaping surface 212 and the fourth shaping surface 222 approach each other or move away from each other. Optionally, the first pressing plate 21 and the second pressing plate 22 can be rotated by the same rotating shaft 23. Of course, the first pressing plate 21 and the second pressing plate 22 can also be independently rotated by different rotating shafts 23.

[0097] In the embodiment of the present application, the third shaping surface 212 and the fourth shaping surface 222 are provided to shape the pole lug 220, and the third shaping surface 212 and the fourth shaping surface 222 can change the maximum spacing in the first direction X, thereby increasing the shaping area of ​​the pole lug 220 by the third shaping surface 212 and the fourth shaping surface 222, reducing the risk of the pole lug 220 being inserted into the pole piece and causing a short circuit due to the excessive length of the pole lug root 220a caused by insufficient shaping area, thereby improving the reliability of the battery cell.

[0098] In some optional embodiments, see Figures 1 to 4 The first pressing plate 21 and the second pressing plate 22 are configured to be able to translate relative to each other along the first direction X.

[0099] Optionally, the first pressing plate 21 and the second pressing plate 22 can be driven by an electric control device or cooperated with a mechanical mechanism to achieve relative translation of the first pressing plate 21 and the second pressing plate 22 along the first direction X.

[0100] In the embodiment of the present application, the above-mentioned setting is helpful to reduce the control difficulty of the first pressure plate 21 and the second pressure plate 22, and improve the control accuracy of the translation distance of the first pressure plate 21 and the second pressure plate 22, thereby improving the preparation yield of the tab 220 and improving the reliability of the battery cell.

[0101] In some optional embodiments, see Figures 1 to 4 The first pressing plate 21 includes a first guiding structure, and the first guiding structure is used to cooperate with the external component so that the first pressing plate 21 can translate under the action of the external component.

[0102] In the embodiment of the present application, by providing the first guiding structure, it is helpful to simplify the overall structure of the first pressing plate 21 , reduce the preparation cost of the first pressing plate 21 , and improve the preparation efficiency of the first pressing plate 21 for shaping the tab 220 .

[0103] In some optional embodiments, see Figures 1 to 4 The first guiding structure includes a first guiding groove 213 , and the first guiding groove 213 is formed by a depression of one side of the first pressing plate 21 toward the second pressing plate 22 .

[0104] The first guide groove 213 can ensure that the first pressing plate 21 can translate along the first direction X. External components (such as a slider, a lead screw nut assembly, etc.) can be embedded in the first guide groove 213 and drive the first pressing plate 21 to translate by sliding or rotating.

[0105] Exemplarily, the external component may include a columnar structure with serrations, and a lead screw and nut assembly is provided in the first pressure plate 21, wherein the end of the lead screw away from the nut is located in a guide hole, and during the process of converting from the second state to the third state, the lead screw contacts the external component and is driven by the serrations to rotate so that the nut moves in a direction away from the external component to drive the first pressure plate 21 as a whole to move away from the external component.

[0106] In the embodiment of the present application, by providing the first guide groove 213 , it is beneficial to improve the stability and accuracy of the translational movement of the first pressing plate 21 along the first direction X, simplify the overall structure of the first pressing plate 21 , and reduce the preparation cost of the first pressing plate 21 .

[0107] In some optional embodiments, see Figures 1 to 4 The second pressing plate 22 includes a second guiding structure, and the second guiding structure is used to cooperate with an external component so that the second pressing plate 22 can translate under the action of the external component.

[0108] In the embodiment of the present application, by providing the second guiding structure, it is helpful to simplify the overall structure of the second pressing plate 22 , reduce the preparation cost of the second pressing plate 22 , and improve the preparation efficiency of the second pressing plate 22 for shaping the tab 220 .

[0109] In some optional embodiments, see Figures 1 to 4 The second guide structure includes a second guide groove 223 , and the second guide groove is formed by a depression of the second pressing plate 22 toward one side of the first pressing plate 21 .

[0110] The second guide groove 223 can ensure that the second pressing plate 22 can translate along the first direction X, and external components (such as a slider, a lead screw nut assembly, etc.) can be embedded in the second guide groove 223 and drive the first pressing plate 21 to translate by sliding or rotating.

[0111] Exemplarily, the external component may include a columnar structure with serrations, and a lead screw and nut assembly is provided in the second pressure plate 22, wherein the end of the lead screw away from the nut is located in a guide hole, and during the process of converting from the second state to the third state, the lead screw contacts the external component and is driven by the serrations to rotate so that the nut moves in a direction away from the external component to drive the second pressure plate 22 as a whole to move away from the external component.

[0112] In the embodiment of the present application, by providing the second guide groove 223 , it is beneficial to improve the stability and accuracy of the translational movement of the second pressing plate 22 along the first direction X, simplify the overall structure of the second pressing plate 22 , and reduce the preparation cost of the second pressing plate 22 .

[0113] In some optional embodiments, see Figures 1 to 4The first pressing plate 21 includes a first guiding structure, the first guiding structure includes a first guiding groove 213, and the first guiding groove and the second guiding groove 223 are enclosed to form a guiding hole H.

[0114] Optionally, the guide hole H formed by the first guide groove 213 and the second guide groove 223 can be formed by penetrating the shaping assembly 20 in the lifting direction Z. In the first state, the first pressing plate 21 and the second pressing plate 22 are in contact, and the first guiding groove 213 and the second guiding groove 223 are enclosed to form the guide hole H. In the process of converting from the second state to the third state, the first pressing plate 21 and the second pressing plate 22 are separated, and the spacing between the first guiding groove 213 and the second guiding groove 223 along the first direction X is increased to separate the first guiding groove 213 and the second guiding groove 223, thereby increasing the maximum size of the first shaping surface 211 and the second shaping surface 221 along the first direction X and the maximum size of the third shaping surface 212 and the fourth shaping surface 222 along the first direction X, so as to increase the shaping area of ​​the tab 220 and improve the reliability of the battery cell.

[0115] In these optional embodiments, the above-mentioned arrangement facilitates the first guide groove 213 and the second guide groove 223 to be moved using the same external component, and the first guide groove 213 and the second guide groove 223 can also be formed by one preparation process, thereby simplifying the structure of the preparation equipment used in the production process and reducing the preparation cost.

[0116] Figure 5 It is a structural schematic diagram of another battery production system provided in an embodiment of the present application. Figure 6 It is a structural schematic diagram of another battery production system provided in an embodiment of the present application. Figure 7 It is a structural schematic diagram of another tab shaping mechanism provided in an embodiment of the present application. Figure 8 It is a structural schematic diagram of another tab shaping mechanism provided in an embodiment of the present application.

[0117] In some optional embodiments, see Figures 5 to 8 , the first pressing plate 21 and the second pressing plate 22 are configured to be rotatably connected.

[0118] Optionally, the rotatable connection between the first pressing plate 21 and the second pressing plate 22 may be achieved by a hinge connection, a bearing connection, a connecting rod connection, or the like.

[0119] In the embodiment of the present application, the above-mentioned configuration is helpful to increase the flexibility and application scope of the shaping component 20 and improve the shaping accuracy and efficiency.

[0120] In some optional embodiments, see Figures 5 to 8The shaping assembly 20 further includes a rotating shaft 23 , which is located between the first pressing plate 21 and the second pressing plate 22 , and the first pressing plate 21 and the second pressing plate 22 are both rotatably connected relative to the rotating shaft 23 .

[0121] The first pressing plate 21 and the second pressing plate 22 are connected by a rotating shaft 23, and the first pressing plate 21 and the rotating shaft 23 are rotatably connected, and the second pressing plate 22 is rotatably connected to the rotating shaft 23. Optionally, when in the first state, the angle between the third shaping surface 212 of the first pressing plate 21 and the fourth shaping surface 222 of the second pressing plate 22 may be an acute angle or an obtuse angle. When in the third state, the third shaping surface 212 of the first pressing plate 21 and the fourth shaping surface 222 of the second pressing plate 22 are coplanar. Optionally, during the process of switching from the second state to the third state, the rotation angles of the first pressing plate 21 and the second pressing plate 22 may be the same. Optionally, during the process of switching from the second state to the third state, the first pressing plate 21 and the second pressing plate 22 rotate synchronously.

[0122] In the embodiment of the present application, the above-mentioned arrangement increases the flexibility of the shaping assembly 20 , and enables the first pressing plate 21 and the second pressing plate 22 to shape the tab 220 at the same time, thereby improving the shaping efficiency.

[0123] In some optional embodiments, see Figures 5 to 8 , the driving member 10 and the shaping assembly 20 are connected by a connecting member 30. The first pressing plate 21 includes a first holding portion 214 and a first connecting portion 216 connected to each other, a third shaping surface 212 is provided on one side of the first holding portion along the lifting direction Z, the first connecting portion 216 is provided with a first guide portion, and the first guide portion is movably connected to the connecting member 30. The second pressing plate 22 includes a second holding portion 224 and a second connecting portion 226 connected to each other, a fourth shaping surface 222 is provided on one side of the second holding portion along the lifting direction Z, the second connecting portion 226 is provided with a second guide portion, and the second guide portion is movably connected to the connecting member 30.

[0124] Optionally, the shaping component 20 is fixedly connected to the driving member 10 via a connecting member 30 .

[0125] Optionally, the connecting member 30 may include a first connecting member 30 and a second connecting member 30 , the first pressing plate 21 is connected to the driving member 10 via the first connecting member, and the second pressing plate 22 is connected to the driving member 10 via the second connecting member 30 .

[0126] Optionally, the first pressing plate 21 and the second pressing plate 22 are connected to the driving member 10 via a connecting member 30 .

[0127] Optionally, the first pressing plate 21 may include a first pressing portion 214 and a third pressing portion 215, the first pressing portion and the third pressing portion 215 are connected, the third pressing portion is connected to the side of the first pressing portion 214 away from the second pressing plate 22 along the first direction X, the side of the third pressing portion 215 facing away from the second pressing plate 22 is provided with a first shaping surface 211, the third pressing portion 215 and the first pressing portion 214 may be connected through a first transition portion, and the angle between the plane where the first transition portion is located and the plane where the first shaping surface 211 is located may be an obtuse angle. Optionally, the surface of the side of the first transition portion facing away from the second pressing plate 22 may be a part of the first shaping surface 211.

[0128] Optionally, a third shaping surface 212 is provided on a side of the first pressing portion 214 facing the free end 220 b of the tab.

[0129] The first pressing portion 214 is connected to the first connecting portion 216, and the first guiding portion provided on the first connecting portion is movably connected to the connecting member 30, so that when the first guiding portion moves, it drives the first connecting portion 216 to move and then drives the first pressing portion 214 to move, so that the first pressure plate 21 can move along the guiding track of the first guiding portion during the rotation process, so as to improve the rotation accuracy of the first pressure plate 21.

[0130] Exemplarily, a groove is provided on the connecting member 30, and the groove extends along a preset direction. The first guide portion is a convex portion protruding from the first connecting portion 216, and the convex portion is arranged in the groove. The convex portion can move according to the extension direction of the groove, so that the first connecting portion 216 moves along a preset trajectory, thereby controlling the overall rotation angle of the first pressure plate 21.

[0131] Optionally, the second pressing plate 22 may include a second pressing portion 224 and a fourth pressing portion 225, the second pressing portion and the fourth pressing portion 225 are connected, the fourth pressing portion is connected to the side of the second pressing portion 224 away from the first pressing plate 21 along the first direction, the side of the fourth pressing portion 225 facing away from the first pressing plate 21 is provided with a second shaping surface 221, the fourth pressing portion 225 and the second pressing portion 224 may be connected through a second transition portion, and the angle between the plane where the second transition portion is located and the plane where the second shaping surface 221 is located may be an obtuse angle. Optionally, the surface of the side of the second transition portion facing away from the first pressing plate 21 may be a part of the second shaping surface 221.

[0132] Optionally, a fourth shaping surface 222 is provided on a side of the second pressing portion 224 facing the free end 220 b of the tab.

[0133] The second pressing portion 224 is connected to the second connecting portion 226, and the second guide portion provided on the second connecting portion is movably connected to the connecting member 30, so that when the second guide portion moves, it drives the second connecting portion 226 to move and then drives the second pressing portion 224 to move, so that the second pressure plate 22 can move along the guide track of the second guide portion during the rotation process to improve the rotation accuracy of the second pressure plate 22.

[0134] Exemplarily, a groove is provided on the connecting member 30, and the groove extends along a preset direction. The second guide portion is a convex portion protruding from the second connecting portion 226, and the convex portion is arranged in the groove. The convex portion can move according to the extension direction of the groove to make the second connecting portion 226 move along a preset trajectory, thereby controlling the overall rotation angle of the second pressure plate 22.

[0135] Optionally, when the first pressure plate 21 and the second pressure plate 22 are configured to be set for translation along the first direction X, the first pressure plate 21 and the first connecting member 30 can be connected by a guide cross roller bearing, and the second pressure plate 22 and the second connecting member 30 can be connected by a guide cross roller bearing.

[0136] In an embodiment of the present application, a first guide portion and a second guide portion are provided to limit the rotation angle of the first pressure plate 21 and the second pressure plate 22, thereby improving the control accuracy of the shaping component 20, simplifying the overall structure of the first pressure plate 21 and the second pressure plate 22, and reducing the preparation cost.

[0137] In some optional embodiments, see Figures 5 to 8 The first guide portion includes a first guide groove 217, the second guide portion includes a second guide groove 227, the connecting member 30 is provided with a first follower portion 31 and a second follower portion 32, the first follower portion and the first guide groove 217 are movably connected, and the second follower portion 32 is movably connected to the second guide groove 227. In the direction from the first holding portion 214 to the first connecting portion 216, the spacing between the first guide groove 217 and the second guide groove 227 along the first direction gradually increases.

[0138] Optionally, the direction from the first pressing portion 214 to the first connecting portion 216 may be the ascending direction driven by the driving member 10 .

[0139] Optionally, the first guide groove 217 may extend in a straight line, and the extension direction of the first guide groove 217 may be a single direction on the plane defined by the lifting direction Z and the first direction X, and the extension direction, the lifting direction Z and the first direction X intersect each other. Optionally, the lifting direction Z is perpendicular to the first direction X, and the intersection angle between the extension direction and the lifting direction Z may be 45 degrees, or other angles. Of course, the first guide groove 217 may also extend in a curve or arc.

[0140] Optionally, the second guide groove 227 may extend in a straight line, and the extension direction of the second guide groove 227 may be a single direction on the plane defined by the lifting direction Z and the first direction X, and the extension direction, the lifting direction Z and the first direction X intersect each other. Optionally, the lifting direction Z is perpendicular to the first direction X, and the intersection angle between the extension direction and the lifting direction Z may be 45 degrees, or other angles. Of course, the first guide groove 217 may also extend in a curve or arc.

[0141] Optionally, the first follower 31 may include a cam bearing follower. Of course, the second follower 32 may also include a cam bearing follower. When the shaping assembly 20 rotates under the influence of gravity or other forces, one end of the first pressing plate 21 close to the rotating shaft 23 and one end of the second pressing plate 22 close to the rotating shaft move downward and the first pressing plate 21 and the second pressing plate 22 rotate relative to each other, and the roller in the first follower 31 rotates in the first guide groove 217 to rotate the first pressing plate 21 along the extension direction of the first guide groove 217. Similarly, the roller in the second follower 32 rotates in the second guide groove 227 to rotate the second pressing plate 22 along the extension direction of the second guide groove 227.

[0142] Exemplarily, the first pressing plate 21 can be hung on the first follower 31 through the first guide groove 217, and the second pressing plate 22 can be hung on the second follower 32 through the second guide groove 227. In the process of converting from the third state to the second state, under the influence of gravity, one end of the first pressing plate 21 close to the rotating shaft 23, one end of the second pressing plate 22 close to the rotating shaft 23, and the rotating shaft 23 move downward, and the end of the first pressing plate 21 away from the rotating shaft (the third holding portion 215) rotates with the rotating shaft 23 as the axis, and the end of the second pressing plate 22 away from the rotating shaft 23 (the fourth holding portion 225) rotates with the rotating shaft 23 as the axis, so that the end of the first pressing plate 21 away from the rotating shaft 23 (the third holding portion 215) and the end of the second pressing plate 22 away from the rotating shaft 23 (the fourth holding portion 225) approach each other and move upward. Optionally, in the first state, the first holding portion 214 and the second holding portion 224 can be V-shaped.

[0143] Exemplarily, in the process of converting from the second state to the third state, one end of the first pressure plate 21 close to the rotating shaft 23, one end of the second pressure plate 22 close to the rotating shaft 23, and the rotating shaft are supported by the free end 220b of the pole ear or other structures, and one end of the first pressure plate 21 close to the rotating shaft 23 and one end of the second pressure plate 22 close to the rotating shaft move up and one end of the first pressure plate 21 away from the rotating shaft 23 (the third pressing portion 215) rotates around the rotating shaft 23 as the axis, and one end of the second pressure plate 22 away from the rotating shaft 23 (the fourth pressing portion 225) rotates around the rotating shaft 23 as the axis so that the end of the first pressure plate 21 away from the rotating shaft 23 (the third pressing portion 215) and the end of the second pressure plate 22 away from the rotating shaft 23 (the fourth pressing portion 225) move away from each other and move downward. When converted to the third state, the third shaping surface 212 of the first pressing portion 214 and the fourth shaping surface 222 of the second pressing portion 224 are coplanar to shape the free end 220b of the pole ear.

[0144] In the embodiment of the present application, the above-mentioned arrangement is helpful to improve the accuracy of controlling the rotation angle of the first pressure plate 21 and the second pressure plate 22, simplify the overall structure of the shaping assembly 20, and improve the shaping efficiency of the pole lug by the pole lug shaping mechanism 100.

[0145] In some optional embodiments, see Figure 1 and Figure 2 The shaping assembly 20 further includes a plurality of elastic members 40 , which are disposed on opposite sides of the first pressing plate 21 and the second pressing plate 22 .

[0146] Exemplarily, when the first pressure plate 21 and the second pressure plate 22 move relative to each other in the first direction X, the elastic member 40 can apply pressure to the first pressure plate 21 and the second pressure plate 22. In the process of converting from the third state to the second state, the elastic member 40 located on the side of the first pressure plate 21 facing away from the second pressure plate 22 applies pressure to the first pressure plate 21 to move the first pressure plate toward the second pressure plate 22, and the elastic member 40 located on the side of the second pressure plate facing away from the first pressure plate 21 applies pressure to the second pressure plate 22 to move the second pressure plate toward the first pressure plate 21.

[0147] Exemplarily, when the first pressure plate 21 and the second pressure plate 22 rotate relative to each other, the elastic member 40 can apply pressure to the first pressure plate 21 and the second pressure plate 22. In the process of converting from the third state to the second state, the elastic member 40 located on the side of the first pressure plate 21 facing away from the second pressure plate 22 applies pressure to the first pressure plate 21, and the elastic member 40 located on the side of the second pressure plate 22 facing away from the first pressure plate 21 applies pressure to the second pressure plate 22 so that the end of the first pressure plate 21 away from the second pressure plate 22 and the end of the second pressure plate away from the first pressure plate 21 approach each other and the first pressure plate and the second pressure plate 22 rotate relative to each other.

[0148] In the embodiment of the present application, by providing the elastic member 40, it is helpful to improve the recovery speed of the shaping component 20 after the shaping is completed, improve the preparation speed of the tab shaping mechanism 100, and improve the production efficiency.

[0149] In a second aspect, an embodiment of the present application provides a battery production system, the battery production system comprising a carrier plate 300, a tab shaping mechanism 100 and a welding device. The carrier plate 300 is used to carry an electrode assembly 200 and an adapter 400, and the electrode assembly 200 includes a tab 220. The tab shaping mechanism 100 in any of the above embodiments. The welding device is used to weld the tab and the adapter 400.

[0150] Optionally, the electrode assembly 200 further includes an electrode body 210 , and a tab 220 extends from one end of the electrode body.

[0151] Optionally, the bearing plate 300 includes a first bearing portion 310 and a second bearing portion 320, the first bearing portion can carry the pole ear 220 and the adapter 400, and the second bearing portion 320 can carry the electrode body 210 of the electrode assembly 200. The first bearing portion 310 may include two, the two first bearing portions respectively carry two pole ears 220, the third shaping surface 212 of the first pressing plate 21 and the fourth shaping surface 222 of the second pressing plate 22 respectively form a holding space with the two first bearing portions 310, and the free end of the pole ear 220 is shaped in the holding space. Optionally, the first pressing plate 21 and the second pressing plate 22 are provided with a welding port 50, and the welding device can weld the free end 220b of the pole ear to the adapter 400 through the welding port. Optionally, the welding port 50 on the first pressing plate 21 can be formed by the first pressing plate penetrating the first pressing plate 21 along the lifting direction Z of the driving member 10. The welding opening 50 on the second pressing plate 22 may be formed by the second pressing plate penetrating the second pressing plate 22 along the lifting direction Z of the driving member 10 .

[0152] In some optional embodiments, see Figures 4 to 6 The supporting plate 300 includes a guide component 330 arranged on the side facing the pole ear 220, and the guide component is used to cooperate with at least one of the first guide structure of the first pressure plate 21 and the second guide structure of the second pressure plate 22, so that at least one of the first pressure plate 21 and the second pressure plate 22 can be translated under the action of the guide structure.

[0153] In some embodiments, the guide component 330 may be used only to cooperate with the first guide structure of the first pressing plate 21, so that the first pressing plate 21 can be translated under the action of the guide component 330. In other embodiments, the guide component 330 may be used only to cooperate with the second guide structure of the second pressing plate 22, so that the second pressing plate 22 can be translated under the action of the guide component 330. In other embodiments, the number of the guide components 330 includes two, one of which may be used only to cooperate with the first guide structure of the first pressing plate 21, so that the first pressing plate 21 can be translated under the action of the guide component 330. The other guide component 330 may be used only to cooperate with the second guide structure of the second pressing plate 22, so that the second pressing plate 22 can be translated under the action of the guide component 330. In other embodiments, the first pressing plate 21 and the first guide portion and the second guide portion of the second pressing plate 22 cooperate with one guide component 330. For example, one guide component 330 includes two parts, one part of the guide component cooperates with the first guide structure of the first pressing plate 21, and the other part of the guide component 330 cooperates with the second guide structure of the second pressing plate 22.

[0154] Optionally, the guide component 330 may be disposed on a side of the first bearing portion 310 facing the tab shaping mechanism 100 .

[0155] In the embodiment of the present application, the first pressure plate 21 and the second pressure plate 22 are in contact with the guide component 330 during the descent process to achieve translational movement of the first pressure plate 21 and the second pressure plate 22, thereby simplifying the overall structure of the first pressure plate 21 and the second pressure plate 22, simplifying the overall structure of the supporting plate 300, and reducing the preparation cost of the supporting plate.

[0156] In some optional embodiments, see Figures 4 to 6 The guide component 330 includes a guide column, a first guide structure and a second guide structure to enclose a guide hole H, which is pointed in the direction of the shaping component 20 by the supporting plate 300. The radial dimension of at least part of the guide column gradually decreases, and the maximum radial dimension of the guide column is greater than the radial dimension of the guide hole H.

[0157] Optionally, the guide column may be in the shape of a frustum, a cone or other shapes.

[0158] Optionally, the direction from the supporting plate 300 to the shaping assembly 20 may be the direction from the guide post to the pressing plate.

[0159] Optionally, the first guide structure may include a first guide groove, and the second guide structure may include a second guide groove.

[0160] Exemplarily, the side wall surface of the guide column is an inclined surface, and, in the direction from the carrier plate 300 to the shaping assembly 20, the side wall surface of the guide column is close to the geometric center of the projection of the guide column along the lifting direction Z. The function of the guide column can make the first pressing plate 21 gradually translate along the inclined direction of the side wall surface of the guide column to the side opposite to the geometric center of the projection of the guide column along the lifting direction Z when the groove wall of the first guide groove contacts the guide column, so as to increase the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X. Similarly, the function of the guide column can make the second pressing plate 22 gradually translate along the inclined direction of the side wall surface of the guide column to the side opposite to the geometric center of the projection of the guide column along the lifting direction Z when the groove wall of the second guide groove contacts the guide column, so as to increase the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X.

[0161] In the embodiment of the present application, through the above-mentioned arrangement, the overall structure of the guide component 330 is further simplified, so that the first pressing plate 21 and the second pressing plate 22 can be translated synchronously, thereby improving the shaping efficiency and improving the production efficiency.

[0162] According to some embodiments of the present application, please refer to Figures 1 to 8 The tab shaping mechanism 100 includes a driving member 10 and a shaping assembly 20. The shaping assembly is connected to the driving member 10, and the driving member is used to drive the shaping assembly 20 to rise and fall. The shaping assembly includes a first pressing plate 21 and a second pressing plate 22 arranged along a first direction X, and the first direction X is perpendicular to the lifting direction Z of the shaping assembly 20. The first pressing plate 21 includes a first shaping surface 211 for abutting against the tab 220, and the second pressing plate 22 includes a second shaping surface 221 for abutting against the tab 220. The first shaping surface 211 is arranged on a side of the first pressing plate 21 away from the second pressing plate 22, and the second shaping surface 221 is arranged on a side of the second pressing plate away from the first pressing plate 21. The first pressing plate and the second pressing plate 22 are configured to be relatively movable to change the maximum spacing between the first shaping surface 211 and the second shaping surface 221 along the first direction X.

[0163] The first pressing plate 21 further includes a third shaping surface 212 for abutting against the pole tab 220, and the second pressing plate 22 includes a fourth shaping surface 222 for abutting against the pole tab 220, the third shaping surface 212 is located on one side of the first pressing plate 21 along the lifting direction Z, and the fourth shaping surface 222 is located on one side of the second pressing plate 22 along the lifting direction Z. The first pressing plate 21 and the second pressing plate 22 are configured to be relatively movable to change the maximum spacing between the third shaping surface 212 and the fourth shaping surface 222 along the first direction X.

[0164] The first pressing plate 21 and the second pressing plate 22 are configured to be able to translate relative to each other along the first direction X. The first pressing plate 21 includes a first guiding structure, the first guiding structure includes a first guiding groove 213, and the first guiding groove is formed by the first pressing plate 21 being recessed toward one side of the second pressing plate 22. The first guiding groove 213 is used to cooperate with an external component so that the first pressing plate 21 can translate under the action of the external component. The second pressing plate 22 includes a second guiding structure, the second guiding structure includes a second guiding groove 223, and the second guiding groove is formed by the second pressing plate 22 being recessed toward one side of the first pressing plate 21. The second guiding groove 223 is used to cooperate with an external component so that the second pressing plate 22 can translate under the action of the external component. The first guiding groove 213 and the second guiding groove 223 enclose a guiding hole H.

[0165] The first pressing plate 21 and the second pressing plate 22 are configured to be rotatably connected. The shaping assembly 20 also includes a rotating shaft 23, which is located between the first pressing plate 21 and the second pressing plate 22, and the first pressing plate and the second pressing plate are both rotatably connected relative to the rotating shaft 23. The driving member 10 and the shaping assembly 20 are connected by a connecting member 30. The first pressing plate 21 includes a first holding portion 214 and a first connecting portion 216 connected to each other, and the first connecting portion is provided with a first guide portion, and the first guide portion is movably connected to the connecting member 30. The second pressing plate 22 includes a second holding portion 224 and a second connecting portion 226 connected to each other, and the second connecting portion is provided with a second guide portion, and the second guide portion is movably connected to the connecting member 30. The first guide portion includes a first guide groove 217, and the second guide portion includes a second guide groove 227. The connecting member 30 is provided with a first follower portion 31 and a second follower portion 32, and the first follower portion is movably connected to the first guide groove 217, and the second follower portion 32 is movably connected to the second guide groove 227. In a direction from the first pressing portion 214 to the first connecting portion 216 , the interval between the first guide groove 217 and the second guide groove 227 along the first direction gradually increases.

[0166] The shaping assembly 20 further includes a plurality of elastic members 40 , which are disposed on opposite sides of the first pressing plate 21 and the second pressing plate 22 .

[0167] The battery production system includes a carrier plate 300, a tab shaping mechanism 100 and a welding device. The carrier plate 300 is used to carry an electrode assembly 200 and a transfer plate 400, and the electrode assembly 200 includes a tab 220. The tab shaping mechanism 100 is any of the above embodiments. The welding device is used to weld the tab and the transfer plate 400.

[0168] The carrier plate 300 includes a guide component 330 disposed on the side facing the pole ear 220, and the guide component is used to cooperate with the first guide structure of the first pressing plate 21 and the second guide structure of the second pressing plate 22, so that the first pressing plate 21 and the second pressing plate 22 can be translated under the action of the guide component 330. The guide component includes a guide column, and the radial dimension of at least part of the guide column is gradually reduced, and the maximum radial dimension of the guide column is greater than the radial dimension of the guide hole H.

[0169] 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 them; 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 by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A tab shaping mechanism, characterized in that: include: Driving parts; A shaping assembly connected to the driving member, the driving member is used to drive the shaping assembly to rise and fall, the shaping assembly comprising a first pressing plate and a second pressing plate arranged along a first direction, the first direction being perpendicular to the lifting direction of the shaping assembly; The first pressing plate includes a first shaped surface for abutting against the pole lug, the second pressing plate includes a second shaped surface for abutting against the pole lug, the first shaped surface is arranged on a side of the first pressing plate away from the second pressing plate, and the second shaped surface is arranged on a side of the second pressing plate away from the first pressing plate; The first pressing plate and the second pressing plate are configured to be relatively movable to change a maximum distance between the first shaping surface and the second shaping surface along the first direction.

2. The tab shaping mechanism according to claim 1, characterized in that: The first pressing plate further comprises a third shaping surface for abutting against the pole lug, the second pressing plate comprises a fourth shaping surface for abutting against the pole lug, the third shaping surface is located on one side of the first pressing plate along the lifting direction, and the fourth shaping surface is located on one side of the second pressing plate along the lifting direction; The first pressing plate and the second pressing plate are configured to be relatively movable to change a maximum distance between the third shaping surface and the fourth shaping surface along the first direction.

3. The electrode ear shaping mechanism according to claim 1, characterized in that: The first pressing plate and the second pressing plate are configured to be relatively translatable along the first direction.

4. The electrode ear shaping mechanism according to claim 3, characterized in that: The first pressing plate includes a first guiding structure, and the first guiding structure is used to cooperate with an external component so that the first pressing plate can translate under the action of the external component.

5. The electrode ear shaping mechanism according to claim 4, characterized in that: The first guide structure includes a first guide groove, and the first guide groove is formed by a depression of one side of the first pressing plate toward the second pressing plate.

6. The electrode ear shaping mechanism according to claim 3, characterized in that: The second pressing plate includes a second guiding structure, and the second guiding structure is used to cooperate with an external component so that the second pressing plate can be translated under the action of the external component.

7. The electrode ear shaping mechanism according to claim 6, characterized in that: The second guide structure includes a second guide groove, and the second guide groove is formed by a side of the second pressing plate being recessed toward the first pressing plate.

8. The electrode tab shaping mechanism according to claim 7, characterized in that: The first pressing plate includes a first guiding structure, the first guiding structure includes a first guiding groove, and the first guiding groove and the second guiding groove are combined to form a guiding hole.

9. The electrode tab shaping mechanism according to claim 1, characterized in that: The first pressure plate and the second pressure plate are configured to be rotatably connected.

10. The electrode ear shaping mechanism according to claim 9, characterized in that: The shaping assembly further includes a rotating shaft, and the rotating shaft is located between the first pressing plate and the second pressing plate, and the first pressing plate and the second pressing plate are both rotatably connected relative to the rotating shaft.

11. The electrode tab shaping mechanism according to claim 10, characterized in that: The driving member and the shaping assembly are connected via a connecting member; The first pressing plate comprises a first holding portion and a first connecting portion connected to each other, the first holding portion is provided with a third shaping surface on one side along the lifting direction, the first connecting portion is provided with a first guiding portion, and the first guiding portion is movably connected to the connecting member; The second pressing plate includes a second holding portion and a second connecting portion connected to each other, the second holding portion is provided with a fourth shaping surface along one side of the lifting direction, the second connecting portion is provided with a second guiding portion, and the second guiding portion is movably connected to the connecting member.

12. The electrode tab shaping mechanism according to claim 11, characterized in that: The first guide portion includes a first guide groove, the second guide portion includes a second guide groove, the connecting member is provided with a first follower portion and a second follower portion, the first follower portion and the first guide groove are movably connected, and the second follower portion and the second guide groove are movably connected; In a direction from the first pressing portion to the first connecting portion, the distance between the first guide groove and the second guide groove along the first direction gradually increases.

13. The electrode ear shaping mechanism according to any one of claims 1 to 12, characterized in that: The shaping assembly further comprises a plurality of elastic members, and the plurality of elastic members are arranged on two opposite sides of the first pressing plate and the second pressing plate.

14. A battery production system, characterized in that: include: A carrying plate, used for carrying an electrode assembly and a transfer sheet, wherein the electrode assembly includes a tab; The tab shaping mechanism according to any one of claims 1 to 13; A welding device is used for welding the tab and the adapter.

15. The battery production system according to claim 14, characterized in that: The supporting plate includes a guide component arranged on the side facing the pole ear, and the guide component is used to cooperate with at least one of the first guide structure of the first pressure plate and the second guide structure of the second pressure plate, so that at least one of the first pressure plate and the second pressure plate can be translated under the action of the guide component.

16. The battery production system according to claim 15, characterized in that: The guide component includes a guide column, and the first guide structure and the second guide structure are combined to form a guide hole, which is pointed from the supporting plate to the direction of the shaping component. The radial dimension of at least part of the guide column gradually decreases, and the maximum radial dimension of the guide column is greater than the radial dimension of the guide hole.

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