Shaping device and battery device production line

Abstract

The embodiment of the utility model provides a shaping device and a battery device production line. The shaping device comprises a first shaping piece and a second shaping piece which are arranged in the first direction, the first shaping piece comprises a first surface and a second surface, the first surface is used for containing the adapter, the second surface is located on the side of the first surface in the second direction, and the first surface and the second surface are connected to form a first connecting position. The first connecting part is used for shaping the first tab. The second shaping piece comprises a third surface and a fourth surface, the first surface and the third surface are oppositely arranged, the fourth surface is located on the side of the third surface in the second direction, the third surface and the fourth surface are connected to form a second connecting position, and the second connecting position is used for shaping the second tab. And on a projection plane perpendicular to the first direction, the orthographic projection of the second connecting part is closer to the center of the second shaping part than the orthographic projection of the first connecting part. According to the technical scheme provided by the invention, the reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery device production, and in particular to a shaping device and a battery device production line. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery device technology is an important factor related to their development.

[0003] In the development of battery technology, how to improve the reliability of battery devices is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The present application provides a shaping device and a battery device production line, which can improve the reliability of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a shaping device for shaping a pole ear of an electrode assembly, wherein the electrode assembly comprises a first electrode assembly and a second electrode assembly stacked along a first direction, the first electrode assembly comprises a first main body and a first pole ear, the second electrode assembly comprises a second main body and a second pole ear, in a second direction, the first pole ear and the second pole ear extend from one end of the same side of the first main body and the second main body respectively, the first pole ear and the second pole ear are gathered together, and the first direction and the second direction are perpendicular to each other. The shaping device comprises a first shaping member and a second shaping member arranged along a first direction, the first shaping member comprises a first surface and a second surface, the first surface is used to place an adapter, the second surface is located on the side of the first surface in the second direction, one end of the first surface in the second direction and one end of the second surface close to the second shaping member in the first direction are connected to form a first connection, and the first connection is used to shape the first pole ear. The second shaping member includes a third surface and a fourth surface. In the first direction, the first surface and the third surface are arranged opposite to each other, the fourth surface is located to the side of the third surface in the second direction, and one end of the third surface in the second direction is connected to one end of the fourth surface close to the first shaping member in the first direction to form a second connection point, and the second connection point is used to shape the second tab. In the projection plane perpendicular to the first direction, the orthographic projection of the second connection point is closer to the center of the second shaping member than the orthographic projection of the first connection point.

[0007] The technical solution of the embodiment of the present application is to shape the first pole ear through the first connection of the first shaping member so that the first pole ear forms a first bend, and to shape the second pole ear through the second connection of the second shaping member so that the second pole ear forms a second bend, so that the first pole ear and the second pole ear are connected to the surface of the adapter away from the first surface. At the same time, on the projection plane perpendicular to the first direction, the orthographic projection of the second connection is closer to the center of the second shaping member than the orthographic projection of the first connection, so that the second bend is closer to the center of the second shaping member than the first bend. In the subsequent process of producing the battery device, the first main body and the second main body are flipped around the position where the first pole ear and the second pole ear are connected to the adapter. When flipping, the bending trends of the first bend and the second bend are retained, so that the bending trends of the first bend and the second bend are in opposite directions. After flipping, the end surface of the first main body extending from the first pole ear and the end surface of the second main body extending from the second pole ear face the surface of the adapter connecting the first pole ear and the second pole ear, and the second bend is closer to the adapter than the first bend in the first direction, that is, the first bend and the second bend are staggered, and the adapter is connected along the first direction. When moving toward the first main body and the second main body, due to the opposite bending trends, in the second direction, the second bend moves toward the direction close to the first bend, and the first bend moves toward the direction close to the second bend. Since the first bend and the second bend are staggered in the first direction, the risk of mutual compression between the first bend and the second bend is smaller, which can help reduce the risk of the second bend being squeezed and inserted into the second main body, reduce the risk of short circuit in the second electrode assembly, and improve the reliability of the battery cell, thereby improving the reliability of the battery device.

[0008] In some embodiments, in the second direction, the distance between the first connection point and the second connection point is D1, which satisfies the condition: 0.5 mm ≤ D1 ≤ 4 mm.

[0009] In the technical solution of the embodiment of the present application, in the second direction, the distance D1 between the first connection and the second connection satisfies the above conditions. When D1 ≥ 0.5 mm, in the subsequent process of the battery device production, it can help reduce the risk of inserting the second main body at the second bend, thereby helping to improve the reliability of the battery device. The second pole ear extends along the second direction, and the second pole ear is shaped to reduce the size of the second pole ear in the second direction, while facilitating the first pole ear and the second pole ear to be folded and connected to the adapter, and the end of the second pole ear away from the adapter is flush with the end of the first pole ear away from the adapter in the second direction. When D1 ≤ 4 mm, the size of the first pole ear in the second direction is usually unchanged, that is, the size of the second pole ear in the second direction is smaller, so that the second shaping member has a better effect on shaping the second pole ear.

[0010] In some embodiments, 1 mm ≤ D1 ≤ 2 mm.

[0011] In the technical solution of the embodiment of the present application, in the second direction, the distance D1 between the first connection point and the second connection point meets the above conditions. When D1≥1mm, it can further help reduce the risk of inserting the second main body at the second bend, thereby helping to improve the reliability of the battery device; when D1≤4mm, the second shaping member can further achieve a better effect of shaping the second pole ear.

[0012] In some embodiments, the first surface extends along the second direction, the second surface is inclined with respect to the first surface, and an angle α between the first surface and the second surface satisfies the condition: 75°≤α≤85°.

[0013] In the technical solution of the embodiment of the present application, the angle α between the first surface and the second surface satisfies the above conditions. When α≥75°, that is, the angle between the first surface and the second surface is larger, so that the first shaping member has a better effect on shaping the first pole ear; when α≤85°, the angle of the first bend formed at the first connection is smaller, which is beneficial to reducing the risk of damage to the first pole ear caused by stress concentration at the first bend, thereby helping to improve the reliability of the battery device.

[0014] In some embodiments, 79°≤α≤82°.

[0015] In the technical solution of the embodiment of the present application, the angle α between the first surface and the second surface satisfies the above conditions. When α≥79°, the first shaping member can further improve the effect of shaping the first pole ear. When α≤82°, it is beneficial to further reduce the risk of damage to the first pole ear caused by stress concentration at the first bend, thereby improving the reliability of the battery device.

[0016] In some embodiments, the first shaping member further includes a first arc surface, the first arc surface connects the first surface and the second surface, and a radius R1 of the first arc surface satisfies the condition: 0.5 mm ≤ R1 ≤ 3 mm.

[0017] The technical solution of the embodiment of the present application connects the first surface and the second surface through the first arc surface, which is conducive to reducing the risk of damage to the first pole ear due to stress concentration at the first bend. At the same time, the radius R1 of the first arc surface meets the above conditions. When R1≥0.5mm, the radius of the first arc surface is larger, which can help reduce the risk of damage to the first pole ear due to stress concentration at the first bend; when R1≤3mm, the radius of the first arc surface is smaller, which is conducive to improving the shaping effect of the first pole ear.

[0018] In some embodiments, 0.8 mm ≤ R1 ≤ 1.5 mm.

[0019] In the technical solution of the embodiment of the present application, the radius R1 of the first arc surface meets the above conditions. When R1≥0.8mm, it can further help reduce the risk of damage to the first pole ear due to stress concentration at the first bend; when R1≤3mm, it is beneficial to further improve the shaping effect of the first pole ear.

[0020] In some embodiments, the first shaping member further includes a fifth surface, the fifth surface extends along the first direction, the fifth surface is connected to an end of the second surface facing away from the first surface, and the fifth surface is used to contact the first main body.

[0021] According to the technical solution of the embodiment of the present application, the fifth surface extends along the first direction and contacts the first main body through the fifth surface, so that the fifth surface can limit the first main body in the second direction, which is beneficial to improving the effect of the first shaping member on the first pole ear.

[0022] In some embodiments, the first shaping member further includes a second arc surface, and the second arc surface connects the fifth surface and the second surface.

[0023] The technical solution of the embodiment of the present application connects the fifth surface and the second surface by the second arc surface, thereby reducing the risk of stress concentration at the connection between the fifth surface and the second surface of the first pole ear, thereby helping to reduce the risk of damage to the first pole ear.

[0024] In some embodiments, in the first direction, the size of the second surface is D2, satisfying the condition: 5 mm ≤ D2 ≤ 20 mm.

[0025] In the technical solution of the embodiment of the present application, the end surface of the first main body extending from the first pole ear is divided into two parts, the two parts have the same size in the first direction, one part extends from the first pole ear, and in the first direction, the size of the part extending from the first pole ear is the same as the size of the second surface. The size D2 of the second surface meets the above conditions, so that the first shaping member can be used to shape electrode assemblies of various sizes and models, which is conducive to improving the applicability and practicality of the first shaping member.

[0026] In some embodiments, the first shaping member further includes a limit member, which extends along the first direction. The limit member is arranged at one end of the first shaping member in the second direction. In the second direction, the limit member has an outer surface which faces away from the center of the first shaping member, and the outer surface is flush with the fifth surface. In the direction from the first surface to the third surface, the limit member exceeds the first surface. The limit member is used to contact the first main body portion and the second main body portion.

[0027] According to the technical solution of the embodiment of the present application, the limiter extends along the first direction, and the outer surface of the limiter can contact the first main body and the second main body, and the outer surface of the limiter is flush with the fifth surface, so that the fifth surface can limit the first main body and the second main body in the second direction, which is beneficial to improve the effect of the shaping device on the electrode assembly.

[0028] In some embodiments, in the first direction, the second shaping member has a sixth surface, which is arranged opposite to the third surface. The second shaping member is provided with a through hole, which connects the third surface and the sixth surface in the first direction, and is used to correspond to the adapter.

[0029] In the technical solution of the embodiment of the present application, the first pole ear and the second pole ear are connected to the adapter by welding. By providing a through hole on the second shaping member, and the through hole connecting the third surface and the sixth surface, it is convenient for the execution end of the welding equipment to realize welding of the first pole ear and the second pole ear with the adapter through the through hole, which is conducive to improving the convenience of welding.

[0030] In some embodiments, the electrode assembly includes a third electrode assembly and a fourth electrode assembly stacked along a first direction, the third electrode assembly includes a third main body and a third pole lug, the fourth electrode assembly includes a fourth main body and a fourth pole lug, and in the second direction, the third pole lug and the fourth pole lug extend from the first main body and the second main body respectively toward one end of the first electrode assembly, and the third pole lug and the fourth pole lug are gathered together. The first shaping member also includes a seventh surface, the seventh surface is arranged opposite to the second surface along the second direction, the seventh surface is connected to the first surface to form a third connection, and the third connection is used to shape the third pole lug. The second shaping member also includes an eighth surface, the eighth surface is arranged opposite to the fourth surface along the second direction, the eighth surface is connected to the third surface to form a fourth connection, and the fourth connection is used to shape the fourth pole lug. Wherein, on the projection plane perpendicular to the first direction, the orthographic projection of the fourth connection is closer to the center of the second shaping member than the orthographic projection of the third connection.

[0031] The technical solution of the embodiment of the present application is to shape the third pole ear through the third connection of the third shaping member so that the third pole ear forms a third bend, and to shape the fourth pole ear through the fourth connection of the fourth shaping member so that the fourth pole ear forms a fourth bend, so that the third pole ear and the fourth pole ear are connected to the adapter. At the same time, on the projection plane perpendicular to the first direction, the orthographic projection of the fourth connection is closer to the center of the second shaping member than the orthographic projection of the third connection, so that the fourth bend is closer to the center of the second shaping member than the third bend. In the subsequent process of battery device production, it is possible to reduce the risk of the fourth bend being inserted into the fourth main body, thereby reducing the risk of short circuit of the fourth electrode assembly and improving the reliability of the battery device.

[0032] In a second aspect, the present application also provides a battery production line, comprising a shaping device as in any embodiment of the first aspect.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a shaping device provided in some embodiments of the present application;

[0036] Figure 2 Schematic diagram of a first shaping member and a second shaping member provided for some embodiments of the present application;

[0037] Figure 3 for Figure 2 The enlarged view of A in FIG.

[0038] Figure 4 Schematic diagrams of a first shaping member and a second shaping member provided for other embodiments of the present application;

[0039] Figure 5 for Figure 4 The enlarged view of point B in FIG.

[0040] Figure 6 A schematic diagram of a first shaping member provided in some embodiments of the present application;

[0041] Figure 7 A schematic diagram of another viewing angle of the first shaping member provided in some embodiments of the present application;

[0042] Figure 8 for Figure 1 A schematic diagram of a first electrode assembly and a second electrode assembly;

[0043] Fig. 9 for Figure 8 The enlarged view of point C in the figure;

[0044] Fig.10 is a schematic diagram of a first electrode assembly and a second electrode assembly in another state;

[0045] Fig.11 for Figure 1A schematic diagram of a third electrode assembly and a fourth electrode assembly;

[0046] Fig.12 for Fig.11 The enlarged view of D in the figure;

[0047] Fig.13 is a schematic diagram of the third electrode assembly and the fourth electrode assembly in another state.

[0048] Icons: 1-shaping device; 10-first shaping member; 11-first surface; 12-second surface; 13-first connection; 14-first arc surface; 15-fifth surface; 16-second arc surface; 17-limiting member; 171-outer surface; 18-seventh surface; 19-third connection; 20-second shaping member; 21-third surface; 22-fourth surface; 23-second connection; 24-sixth surface; 25-through hole; 26-eighth surface; 27-fourth connection; 100-electrode assembly; 110-first Electrode assembly; 111-first main body; 112-first pole ear; 113-first bend; 120-second electrode assembly; 121-second main body; 122-second pole ear; 123-second bend; 130-third electrode assembly; 131-third main body; 132-third pole ear; 133-third bend; 140-fourth electrode assembly; 141-fourth main body; 142-fourth pole ear; 143-fourth bend; 200-adapter; Z-first direction; X-second direction; Y-third direction. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0051] Reference to "embodiments" in this application 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 in this application may be combined with other embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0054] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0055] In some embodiments, the battery device may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0056] In some embodiments, the battery device may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] The battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.

[0061] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, the prismatic battery cell including a square case battery cell.

[0062] 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.

[0063] At present, from the perspective of market development, batteries have been widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as electric tools, drones, energy storage equipment, etc. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0064] The development of battery device technology must take into account multiple design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, in the production of battery devices, the reliability of battery devices is also one of the key factors to consider.

[0065] At present, in the production process of battery devices, the electrode tabs of the electrode assemblies need to be shaped and welded to the adapters, and the adapters are electrically connected to the electrode terminals of the battery cells to realize the charging and discharging of the battery cells, and the battery cells are accommodated in a box to form a battery device.

[0066] When a battery cell has a plurality of electrode assemblies, there is a situation where the tabs of the plurality of electrode assemblies with the same polarity are gathered in the same adapter.

[0067] Taking two electrode assemblies as an example, the two electrode assemblies include a first electrode assembly and a second electrode assembly arranged along a first direction, wherein the electrode assembly includes a main body and a tab extending from one end of the main body in a second direction.

[0068] The shaping device includes a first shaping member and a second shaping member. The first shaping member includes a second surface and a first surface connected in sequence. The first surface and the second surface form a first connection. The adapter is arranged on the first surface. The ear of the first electrode assembly is shaped at the first connection to form a first bend.

[0069] The second shaping member includes a fourth surface and a third surface connected in sequence, the third surface and the fourth surface form a second connection, and the electrode ear of the second electrode assembly is shaped at the second connection to form a second bend. In the first direction, the projection of the first connection overlaps the projection of the second connection, that is, after shaping, in the first direction, the first bend is in contact with the second bend.

[0070] After the shaping, the first electrode tab and the second electrode tab are connected to the surface of the adapter facing away from the first surface.

[0071] The two main bodies are flipped around the position where the pole ear is connected to the adapter. When flipping, the bending trends of the first bend and the second bend are retained, so that the bending trends of the first bend and the second bend are in opposite directions. After flipping, the two main bodies extend out of the end surface of the pole ear and face the surface of the adapter connected to the pole ear. After the adapter is connected to the end cover, the adapter is connected to the electrode terminal on the end cover, and the end cover is moved along the first direction close to the main body of the electrode assembly, so that the adapter squeezes the pole ear to compress the size of the electrode assembly in the first direction and reduce the space occupied by the electrode assembly in the first direction.

[0072] At this time, the first bend corresponds to the second bend. Due to the opposite bending trends, in the second direction, the second bend moves toward the direction close to the first bend, and the first bend moves toward the direction close to the second bend. When the adapter squeezes the pole ear, the first bend and the second bend squeeze each other. In the second direction, there is less avoidance space between the first bend and the second bend, which makes it easy for the second bend to be inserted into the main body of the second electrode assembly, thereby easily causing a short circuit in the electrode assembly and affecting the reliability of the battery device.

[0073] Based on the above considerations, in order to reduce the problem that the electrode tab is inserted into the main body of the electrode assembly, causing the electrode assembly to short-circuit and affecting the reliability of the battery device, an embodiment of the present application provides a shaping device. The shaping device includes a first shaping member and a second shaping member arranged along a first direction, the first shaping member includes a first surface and a second surface, the first surface is used to place the adapter, the second surface is located on the side of the first surface in the second direction, one end of the first surface in the second direction and the second surface are connected to one end of the second shaping member in the first direction close to form a first connection, and the first connection is used to shape the first tab. The second shaping member includes a third surface and a fourth surface, in the first direction, the first surface and the third surface are arranged oppositely, the fourth surface is located on the side of the third surface in the second direction, one end of the third surface in the second direction and one end of the fourth surface in the first direction close to the first shaping member are connected to form a second connection, and the second connection is used to shape the second tab. Wherein, on the projection plane perpendicular to the first direction, the orthographic projection of the second connection is closer to the center of the second shaping member than the orthographic projection of the first connection.

[0074] The first pole ear is shaped by the first connection of the first shaping member so that the first pole ear forms a first bend, and the second pole ear is shaped by the second connection of the second shaping member so that the second pole ear forms a second bend, so that the first pole ear and the second pole ear are connected to the adapter. At the same time, on the projection plane perpendicular to the first direction, the orthographic projection of the second connection is closer to the center of the second shaping member than the orthographic projection of the first connection, so that the second bend is closer to the center of the second shaping member than the first bend. In the subsequent process of producing the battery device, the first main body and the second main body are flipped over so that the end face of the first main body extending out of the first pole ear and the end face of the second main body extending out of the second pole ear face the adapter connecting the first pole ear and the second pole ear, and the first bend is closer to the adapter than the second bend, that is, the first bend and the second bend are staggered, and when the adapter is moved along the first direction toward the first main body and the second main body, the risk of mutual extrusion between the first bend and the second bend is relatively small, thereby reducing the risk of the second bend being squeezed and inserted into the second main body, reducing the risk of short circuit in the second electrode assembly, and improving the reliability of the battery cell, thereby improving the reliability of the battery device.

[0075] The shaping device disclosed in the embodiment of the present application can be used, but is not limited to, for the production of battery cells including four electrode assemblies. The shaping device disclosed in the present application can also be used for the production of battery cells including other numbers of electrode assemblies.

[0076] The present application embodiment provides a shaping device 1 for shaping the tab of an electrode assembly 100. Figure 8 and Fig. 9 , Figure 8 for Figure 1 A schematic diagram of a first electrode assembly and a second electrode assembly, Fig. 9 for Figure 8 The electrode assembly 100 includes a first electrode assembly 110 and a second electrode assembly 120 stacked along a first direction Z, the first electrode assembly 110 includes a first main body 111 and a first pole ear 112, the second electrode assembly 120 includes a second main body 121 and a second pole ear 122, in the second direction X, the first pole ear 112 and the second pole ear 122 extend from one end of the same side of the first main body 111 and the second main body 121, respectively, the first pole ear 112 and the second pole ear 122 are gathered together, and the first direction Z and the second direction X are perpendicular to each other.

[0077] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of a shaping device provided in some embodiments of the present application, Figure 2Schematic diagram of a first shaping member and a second shaping member provided for some embodiments of the present application. The shaping device 1 includes a first shaping member 10 and a second shaping member 20 arranged along a first direction Z, the first shaping member 10 includes a first surface 11 and a second surface 12, the first surface 11 is used to place the adapter 200, the second surface 12 is located on the side of the first surface 11 in the second direction X, one end of the first surface 11 in the second direction X is connected to one end of the second surface 12 close to the second shaping member 20 in the first direction Z to form a first connection 13, the first connection 13 is used to shape the first pole ear 112. The second shaping member 20 includes a third surface 21 and a fourth surface 22, in the first direction Z, the first surface 11 and the third surface 21 are arranged opposite to each other, the fourth surface 22 is located on the side of the third surface 21 in the second direction X, one end of the third surface 21 in the second direction X is connected to one end of the fourth surface 22 close to the first shaping member 10 in the first direction Z to form a second connection 23, the second connection 23 is used to shape the second pole ear 122. In the projection plane perpendicular to the first direction Z, the orthographic projection of the second connection point 23 is closer to the center of the second shaping member 20 than the orthographic projection of the first connection point 13 .

[0078] In some embodiments, the first direction may be represented by the direction indicated by the letter Z in the figure.

[0079] In some embodiments, the first direction Z may be parallel to a width direction of the electrode assembly 100 .

[0080] In some embodiments, the second direction may be represented by the direction indicated by the letter X in the figure.

[0081] In some embodiments, the second direction X may be parallel to the height direction of the electrode assembly 100 .

[0082] In some embodiments, the battery cell may include two electrode assemblies 100, and the two electrode assemblies 100 are respectively a first electrode assembly 110 and a second electrode assembly 120. Alternatively, the battery cell may include a plurality of electrode assemblies 100. Two electrode assemblies 100 in the plurality of electrode assemblies 100 are respectively a first electrode assembly 110 and a second electrode assembly 120. The structures and sizes of the first electrode assembly 110 and the second electrode assembly 120 may be the same. In the first electrode assembly 110, the first pole tab 112 may extend from one end of the first main body 111 in the second direction X. In the second electrode assembly 120, the second pole tab 122 may extend from one end of the second main body 121 in the second direction X. It should be noted that the first main body 111 and the second main body 121 may be located on the same side of the shaping device 1 in the second direction X, the first pole tab 112 may extend from the first main body 111 in the direction of the first shaping member 10, and the second pole tab 122 may extend from the second main body 121 in the direction of the second shaping member 20.

[0083] In some embodiments, one end of the first pole tab 112 can be connected to the first main body 111 , one end of the second pole tab 122 can be connected to the second main body 121 , and the other end of the first pole tab 112 and the other end of the second pole tab 122 can be folded and connected to the adapter 200 .

[0084] The adapter 200 may be in a sheet shape.

[0085] In some embodiments, the first electrode assembly 110 may include two first electrode tabs 112 , and the two first electrode tabs 112 may be spaced apart along the third direction Y. The second electrode assembly 120 may include two second electrode tabs 122 , and the two second electrode tabs 122 may be spaced apart along the third direction Y.

[0086] The third direction can be represented by the direction indicated by the letter Y in the figure.

[0087] In some embodiments, the third direction Y may be parallel to the length direction of the electrode assembly 100 .

[0088] It should be noted that the polarities of the two pole tabs of the electrode assembly 100 are opposite. That is, the polarities of the two first pole tabs 112 are opposite, and the polarities of the two second pole tabs 122 are opposite. In some embodiments, the number of adapters 200 may be two, and the two adapters 200 may be arranged at intervals along the third direction Y, one first pole tab 112 and one second pole tab 122 have the same polarity and are connected to one adapter 200, and the other first pole tab 112 and another second pole tab 122 have the same polarity and are connected to the other adapter 200.

[0089] In some embodiments, the first direction Z, the second direction X, and the third direction Y are perpendicular to each other.

[0090] In some embodiments, the shaping device 1 may include a first shaping member 10 and a second shaping member 20 arranged along a first direction Z. The first shaping member 10 and the second shaping member 20 may be made of metal.

[0091] In some embodiments, the first shaping member 10 and the second shaping member 20 may be block-shaped.

[0092] In some embodiments, the first shaping member 10 may include a first surface 11 and a second surface 12, the first surface 11 may extend along the second direction X, and the second surface 12 may be located on a side of the first surface 11 facing the first main body portion 111 in the second direction X. An end of the first surface 11 close to the first main body portion 111 in the second direction X is connected to an end of the second surface 12 facing the second shaping member 20 in the first direction Z, thereby forming a first connection 13, that is, the first connection 13 is a corner of the first shaping member 10.

[0093] In some embodiments, the second shaping member 20 may include a third surface 21 and a fourth surface 22, the third surface 21 may extend along the second direction X, and in the first direction Z, the first surface 11 and the third surface 21 are arranged opposite to each other, and the fourth surface 22 may be located on a side of the third surface 21 facing the second main body 121 in the second direction X. An end of the third surface 21 close to the second main body 121 in the second direction X is connected to an end of the fourth surface 22 facing the first shaping member 10 in the first direction Z, thereby forming a second connection 23, that is, the second connection 23 is a corner of the second shaping member 20.

[0094] It should be noted that the first connection 13 may be the location where the first surface 11 and the second surface 12 are connected, and the second connection 23 may be the location where the third surface 21 and the fourth surface 22 are connected. Alternatively, the first surface 11 and the second surface 12 may be connected by an arc transition to reduce the risk of damage to the first pole ear 112 due to stress concentration when the first pole ear 112 is shaped, and the third surface 21 and the fourth surface 22 may be connected by an arc transition to reduce the risk of damage to the second pole ear 122 due to stress concentration when the second pole ear 122 is shaped, in which case the first connection 13 and the second connection 23 may be transition arcs.

[0095] In some embodiments, in the direction in which the first shaping member 10 points to the second shaping member 20, the distance between the first surface 11 and the second surface 12 in the second direction X can gradually decrease, and the distance between the third surface 21 and the fourth surface 22 in the second direction X can gradually increase, that is, the second surface 12 and the fourth surface 22 are inclined surfaces, and the angle between the first surface 11 and the second surface 12 and the angle between the third surface 21 and the fourth surface 22 are not right angles.

[0096] Please refer to Figure 1 , Figure 2 , Figure 8 and Fig. 9 The process of the tab shaping can be: the first shaping member 10 and the second shaping member 20 are arranged opposite to each other in the first direction Z, a part of the first tab 112 is arranged on the second surface 12, and the other part is arranged on the first surface 11; a part of the second tab 122 is arranged on the fourth surface 22, and the other part is arranged on the second surface 12.

[0097] The second shaping member 20 is moved along the first direction Z close to the first shaping member 10, so that the first shaping member 10 and the second shaping member 20 clamp and squeeze the first pole ear 112 and the second pole ear 122, so that the first pole ear 112 forms a corresponding first bend 113 at the first connection 13, and the second pole ear 122 forms a corresponding second bend 123 at the second connection 23, thereby realizing the shaping of the first pole ear 112 and the second pole ear 122.

[0098] In some embodiments, the adapter 200 can be disposed on the first surface 11, and after the first pole tab 112 and the second pole tab 122 are shaped, an end of the first pole tab 112 away from the first main body 111 and an end of the second pole tab 122 away from the second main body 121 are connected, and the connection method can be welding. The first pole tab 112 and the second pole tab 122 are welded to the surface of the adapter 200 away from the first surface 11 in the first direction Z.

[0099] It should be noted that the thickness direction of the adapter 200 may be parallel to the first direction Z.

[0100] In some embodiments, the first shaping member 10 is projected onto a projection plane perpendicular to the first direction Z to obtain an orthographic projection of the first connection 13, that is, the connection of the orthographic projection of the first surface 11 and the orthographic projection of the second surface 12. The second shaping member 20 is projected onto a projection plane perpendicular to the first direction Z to obtain an orthographic projection of the second connection 23, that is, the connection of the orthographic projection of the third surface 21 and the orthographic projection of the fourth surface 22, and at the same time, the orthographic projection of the center of the second shaping member 20 can be obtained.

[0101] Furthermore, the orthographic projection of the center of the first shaping member 10 and the orthographic projection of the center of the second shaping member 20 may overlap.

[0102] In the second direction X, the orthographic projection of the first connection 13 and the orthographic projection of the second connection 23 can be staggered, that is, the orthographic projection of the first connection 13 and the orthographic projection of the second connection 23 do not overlap, and the distance between the orthographic projection of the second connection 23 and the orthographic projection of the center of the second shaping member 20 can be smaller than the distance between the orthographic projection of the first connection 13 and the orthographic projection of the center of the first shaping member 10.

[0103] Please refer to Fig.10 , Fig.10 FIG. 1 is a schematic diagram of the first electrode assembly and the second electrode assembly in another state. In some embodiments, after the tab shaping process, the electrode assembly 100 needs to be turned over.

[0104] The first electrode assembly 110 and the second electrode assembly 120 can be removed from the shaping device 1 , and the adapter 200 is retained.

[0105] The first electrode assembly 110 and the second electrode assembly 120 can be flipped 90°. Before flipping, the first main body 111 and the second main body 121 are located on one side of the adapter 200 in the second direction X. After flipping, the first main body 111 and the second main body 121 are located on one side of the adapter 200 in the first direction Z, and the first main body 111 and the second main body 121 face the surfaces of the adapter 200 to weld the first pole ear 112 and the second pole ear 122.

[0106] Since the second connection 23 is closer to the center of the second shaping member 20 than the first connection 13 , in the flipped first electrode assembly 110 and the second electrode assembly 120 , in the first direction Z, the second bend 123 is closer to the adapter 200 than the first bend 113 .

[0107] After the adapter 200, the first electrode assembly 110 and the second electrode assembly 120 are flipped 180°, the adapter 200 is moved along the first direction Z close to the first main body 111 and the second main body 121. At this time, the first pole ear 112 and the second pole ear 122 are compressed, and the first bend 113 and the second bend are close to each other in the second direction X, wherein the first bend 113 and the second bend 123 are staggered from each other in the first direction Z, thereby providing an avoidance space for the first bend 113 and the second bend 123 in the second direction X, reducing the risk of the first bend 113 squeezing the second bend 123 so that the second bend 123 is inserted into the second main body 121.

[0108] It should be noted that an electrode terminal is provided on the end cover. Before the adapter 200 is moved along the first direction Z close to the first main body 111 and the second main body 121, the electrode terminal on the end cover is connected to the adapter 200. The connection method can be welding. The method of moving the adapter 200 can be to move the end cover, thereby driving the adapter 200 to move.

[0109] The electrode assembly 100 may be placed in a housing of a battery cell, and the end cover closes the opening of the housing.

[0110] According to the technical solution of the embodiment of the present application, the first pole ear 112 is shaped by the first connection 13 of the first shaping member 10 so that the first pole ear 112 forms a first bend 113, and the second pole ear 122 is shaped by the second connection 23 of the second shaping member 20 so that the second pole ear 122 forms a second bend 123, so that the first pole ear 112 and the second pole ear 122 are connected to the surface of the adapter 200 away from the first surface 11. At the same time, on the projection plane perpendicular to the first direction Z, the orthographic projection of the second connection 23 is closer to the center of the second shaping member 20 than the orthographic projection of the first connection 13, so that the second bend 123 is closer to the center of the second shaping member 20 than the first bend 113. In the subsequent process of battery device production, the first main body 111 and the second main body 121 are flipped around the position where the first pole ear 112 and the second pole ear 122 are connected to the adapter 200. When flipping, the bending trends of the first bend 113 and the second bend 123 are retained, so that the bending trends of the first bend 113 and the second bend 123 are in opposite directions. After flipping, the end surface of the first main body 111 extending out of the first pole ear 112 and the end surface of the second main body 121 extending out of the second pole ear 122 face the surface of the adapter 200 connecting the first pole ear 112 and the second pole ear 122, and the second bend 123 is closer to the adapter 200 than the first bend 113 in the first direction Z, that is, the first bend 113 and the second bend 123 are staggered. When the adapter 200 is moved along the first direction Z toward the first main body 111 and the second main body 121, due to the opposite bending trends, in the second direction X, the second bend 123 moves toward the direction close to the first bend 113, and the first bend 113 moves toward the direction close to the second bend 123. Since the first bend 113 and the second bend 123 are staggered in the first direction Z, the risk of the first bend 113 and the second bend 123 being squeezed against each other is small, which can help reduce the risk of the second bend 123 being squeezed and inserted into the second main body 121, reduce the risk of short circuit in the second electrode assembly 120, and improve the reliability of the battery cell, thereby improving the reliability of the battery device.

[0111] Please refer to Figure 1 and Figure 2 , and refer to Figure 3 , Figure 3 for Figure 2 In some embodiments, in the second direction X, the distance between the first connection point 13 and the second connection point 23 is D1, which satisfies the condition: 0.5 mm ≤ D1 ≤ 4 mm.

[0112] In some embodiments, the first shaping member 10 and the second shaping member 20 can be projected onto a projection plane perpendicular to the third direction Y with the third direction Y as the projection direction to obtain an orthographic projection of the first shaping member 10 and an orthographic projection of the second shaping member 20. At this time, in the second direction X, the distance between the first connection 13 and the second connection 23 is obtained.

[0113] It should be noted that when the first connection 13 and the second connection 23 are arcs, the distance between the first connection 13 and the second connection 23 in the second direction X can be: the distance in the second direction X between the intersection of the extension line of the first surface 11 and the extension line of the second surface 12, and the intersection between the extension line of the third surface 21 and the extension line of the fourth surface 22.

[0114] In some embodiments, in the second direction X, the distance D1 between the first connection 13 and the second connection 23 satisfies the above conditions, that is, D1 can be any one of 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm or a value between any two of them.

[0115] According to the technical solution of the embodiment of the present application, in the second direction X, the distance D1 between the first connection 13 and the second connection 23 meets the above conditions. When D1≥0.5mm, in the subsequent process of the battery device production, it can be helpful to reduce the risk of the second bend 123 inserting into the second main body 121, thereby improving the reliability of the battery device. The second pole ear 122 extends along the second direction X, and the second pole ear 122 is shaped to reduce the size of the second pole ear 122 in the second direction X, and at the same time, it is convenient for the first pole ear 112 and the second pole ear 122 to be folded and connected with the adapter 200, and the end of the second pole ear 122 away from the adapter is flush with the end of the first pole ear 112 away from the adapter in the second direction X. When D1≤4mm, the size of the first pole ear 112 in the second direction X is usually unchanged, that is, the size of the second pole ear 122 in the second direction X is small, so that the second shaping member 20 has a better effect on shaping the second pole ear 122.

[0116] Please refer to Figures 1 to 3 , in some embodiments, 1mm≤D1≤2mm.

[0117] In some embodiments, in the second direction X, the distance D1 between the first connection 13 and the second connection 23 satisfies the above conditions, that is, D1 can be any one of 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, or a value between any two of them.

[0118] According to the technical solution of the embodiment of the present application, in the second direction X, the distance D1 between the first connection 13 and the second connection 23 satisfies the above conditions. When D1≥1mm, it can further reduce the risk of the second bend 123 being inserted into the second main body 121, thereby improving the reliability of the battery device; when D1≤4mm, the second shaping member 20 can further improve the effect of shaping the second pole ear 122.

[0119] Please refer to Figures 1 to 3 In some embodiments, the first surface 11 extends along the second direction X, the second surface 12 is inclined with respect to the first surface 11, and the angle between the first surface 11 and the second surface 12 is α, satisfying the condition: 75°≤α≤85°.

[0120] In some embodiments, the extension direction of the first surface 11 may be parallel to the second direction X.

[0121] In some embodiments, the first shaping member 10 is projected onto a projection plane perpendicular to the third direction Y, with the third direction Y as the projection direction, to obtain an orthographic projection of the first surface 11 and an orthographic projection of the second surface 12. At this time, the orthographic projection of the second surface 12 is extended in the direction close to the first main body 111 along the second direction X, and an angle α is formed between the extension line of the orthographic projection of the second surface 12 and the orthographic projection of the first surface 11, and α satisfies the condition of 75°≤α≤85°.

[0122] In some embodiments, the angle between the first surface 11 and the second surface 12 is α, and α satisfies the above conditions, that is, α can be any one of 75°, 76°, 77°, 78°, 79°, 80°, 81°, 82°, 83°, 84°, 85° or a value between any two of them.

[0123] It should be noted that, during the processing of the first shaping member 10 , there may be tolerances and errors, that is, there may be a certain deviation in the range of the angle α between the first surface 11 and the second surface 12 .

[0124] In the technical solution of the embodiment of the present application, the angle α between the first surface 11 and the second surface 12 satisfies the above conditions. When α≥75°, that is, the angle between the first surface 11 and the second surface 12 is larger, so that the first shaping member 10 has a better effect on shaping the first pole ear 112; when α≤85°, the angle of the first bend 113 formed at the first connection 13 is smaller, which is beneficial to reducing the risk of damage to the first pole ear 112 due to stress concentration at the first bend 113, thereby helping to improve the reliability of the battery device.

[0125] Please refer to Figures 1 to 3 , in some embodiments, 79°≤α≤82°.

[0126] In some embodiments, the angle between the first surface 11 and the second surface 12 is α, and α satisfies the above conditions, that is, α can be any one of 79°, 80°, 81°, 82°, or a value between any two of them.

[0127] According to the technical solution of the embodiment of the present application, the angle α between the first surface 11 and the second surface 12 satisfies the above conditions. When α≥79°, the first shaping member 10 can further improve the shaping effect of the first pole ear 112. When α≤82°, it is beneficial to further reduce the risk of damage to the first pole ear 112 caused by stress concentration at the first bend 113, thereby improving the reliability of the battery device.

[0128] Please refer to Figure 1 , and refer to Figures 4 to 5 , Figure 4 Schematic diagrams of the first shaping member and the second shaping member provided in some other embodiments of the present application, Figure 5 for Figure 4 In some embodiments, the first shaping member 10 further includes a first arc surface 14, the first arc surface 14 connects the first surface 11 and the second surface 12, and the radius R1 of the first arc surface 14 satisfies the condition: 0.5 mm ≤ R1 ≤ 3 mm.

[0129] In order to reduce the risk of damage to the first pole tab 112 due to stress concentration at the first connection 13 when the first pole tab 112 is shaped, that is, to reduce the risk of damage to the first pole tab 112 due to stress concentration at the first bend 113, the first surface 11 and the second surface 12 can be connected by a first arc surface 14. In this case, the first arc surface 14 can be the first connection 13.

[0130] In some embodiments, one end of the first arc surface 14 connected to the first surface 11 can be tangent to one end of the first surface 11 connected to the first arc surface 14, and one end of the first arc surface 14 connected to the second surface 12 can be tangent to one end of the second surface 12 connected to the first arc surface 14.

[0131] In some embodiments, the radius R1 of the first arc surface 14 meets the above conditions, that is, R1 can be any one of 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, or a value between any two of them.

[0132] The technical solution of the embodiment of the present application connects the first surface 11 and the second surface 12 through the first arc surface 14, which is conducive to reducing the risk of damage to the first pole ear 112 due to stress concentration at the first bend 113. At the same time, the radius R1 of the first arc surface 14 meets the above conditions. When R1≥0.5mm, the radius of the first arc surface 14 is larger, which can help reduce the risk of damage to the first pole ear 112 due to stress concentration at the first bend 113; when R1≤3mm, the radius of the first arc surface 14 is smaller, which is conducive to improving the shaping effect of the first pole ear 112.

[0133] Please refer to Figure 1 , Figure 4 and Figure 5 , in some embodiments, 0.8mm≤R1≤1.5mm.

[0134] In some embodiments, the radius R1 of the first arc surface 14 satisfies the above conditions, that is, R1 can be any one of 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm or a value between any two of them.

[0135] In the technical solution of the embodiment of the present application, the radius R1 of the first arc surface 14 meets the above conditions. When R1≥0.8mm, it can further help reduce the risk of damage to the first pole ear 112 due to stress concentration at the first bend 113; when R1≤3mm, it is beneficial to further improve the shaping effect of the first pole ear 112.

[0136] Please refer to Figures 1 to 5 In some embodiments, the first shaping member 10 further includes a fifth surface 15 , which extends along the first direction Z. The fifth surface 15 is connected to an end of the second surface 12 away from the first surface 11 , and the fifth surface 15 is used to contact the first main body portion 111 .

[0137] In some embodiments, the extension direction of the fifth surface 15 may be parallel to the second direction X.

[0138] In some embodiments, in the first direction Z, an end of the second surface 12 facing the second shaping member 20 is connected to the first surface 11 , and an end of the second surface 12 facing away from the second shaping member 20 is connected to the fifth surface 15 .

[0139] In some embodiments, the surface of the first body portion 111 extending out of the first tab 112 in the second direction X may contact the fifth surface 15. When the tab is shaped, the first body portion 111 is moved along the second direction X close to the first shaping member 10 so that the first body portion 111 abuts against the fifth surface 15, thereby limiting the first body portion 111 in the second direction X.

[0140] The surface of the first main body 111 extending out of the first pole tab 112 in the second direction X can be divided into two parts, one part extending out of the first pole tab 112 and the other part not extending out of the pole tab. The part of the first main body 111 contacting the fifth surface 15 is the part not extending out of the pole tab.

[0141] According to the technical solution of the embodiment of the present application, the fifth surface 15 extends along the first direction Z, and contacts the first main body 111 through the fifth surface 15, so that the fifth surface 15 can limit the first main body 111 in the second direction X, which is beneficial to improve the effect of the first shaping member 10 on the first pole ear 112.

[0142] Please refer to Figures 1 to 5 In some embodiments, the first shaping member 10 further includes a second arc surface 16 , and the second arc surface 16 connects the fifth surface 15 and the second surface 12 .

[0143] In some embodiments, one end of the second arc surface 16 in the first direction Z is connected to one end of the fifth surface 15 in the first direction Z close to the second surface 12 , and the other end of the second arc surface 16 in the first direction Z is connected to one end of the second surface 12 in the first direction Z away from the first surface 11 .

[0144] In some embodiments, one end of the second arc surface 16 in the first direction Z may be tangent to the fifth surface 15 , and the other end of the second arc surface 16 in the first direction Z may be tangent to the second surface 12 .

[0145] In some embodiments, the radius of the second arc surface 16 may be R2, and R2 may satisfy the condition: 4 mm ≤ R2 ≤ 6 mm.

[0146] In some embodiments, R2 may be 5 mm.

[0147] The technical solution of the embodiment of the present application connects the fifth surface 15 and the second surface 12 through the second arc surface 16, thereby reducing the risk of stress concentration at the connection between the fifth surface 15 and the second surface 12 of the first pole ear 112, thereby helping to reduce the risk of damage to the first pole ear 112.

[0148] Please refer to Figures 1 to 5 In some embodiments, in the first direction Z, the size of the second surface 12 is D2, satisfying the condition: 5 mm ≤ D2 ≤ 20 mm.

[0149] In some embodiments, the first shaping member 10 is projected onto a projection plane perpendicular to the second direction X, taking the second direction X as the projection direction, to obtain an orthographic projection of the first shaping member 10. The orthographic projection of the second surface 12 has a size D2 in the first direction Z, and D2 satisfies the condition 5 mm ≤ D2 ≤ 20 mm.

[0150] In some embodiments, D2 satisfies the above conditions, and D2 can be any one of 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, 15 mm, 17 mm, 20 mm, or a value between any two of them.

[0151] Please refer to Figure 8 and Fig. 9 The first electrode assembly 110 includes a first main body 111 and a first pole tab 112. In the second direction X, the first pole tab 112 extends from the end surface of the first main body 111 facing the first shaping member 10. In the first direction Z, the end surface extending from the first pole tab 112 is divided into two parts, and the two parts have the same size, wherein one of the two parts close to the second electrode assembly 120 extends the pole tab.

[0152] In the first direction Z, the size of the part extending from the pole ear in the two parts is the same as the size of the second surface 12. That is, the size of the end surface of the first body portion 111 extending from the first pole ear 112 in the first direction Z is 10 mm to 40 mm, for example, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, but not limited thereto.

[0153] In the technical solution of the embodiment of the present application, the end surface of the first main body 111 extending out of the first pole ear 112 is divided into two parts, and the two parts have the same size in the first direction Z, one of which extends out of the first pole ear 112, and in the first direction Z, the size of the part extending out of the first pole ear 112 is the same as the size of the second surface 12. The size D2 of the second surface 12 meets the above conditions, so that the first shaping member 10 can be used to shape electrode assemblies 100 of various sizes and models, which is conducive to improving the applicability and practicality of the first shaping member 10.

[0154] Please refer to Figure 6 and Figure 7 , Figure 6 A schematic diagram of a first shaping member provided in some embodiments of the present application, Figure 7 Schematic diagram of another perspective of the first shaping member provided for some embodiments of the present application. In some embodiments, the first shaping member 10 further includes a stopper 17, the stopper 17 extends along the first direction Z, the stopper 17 is disposed at one end of the first shaping member 10 in the second direction X, in the second direction X, the stopper 17 has an outer surface 171 away from the center of the first shaping member 10, the outer surface 171 is flush with the fifth surface 15, and in the direction from the first surface 11 to the third surface 21, the stopper 17 exceeds the first surface 11, and the stopper 17 is used to contact the first main body portion 111 and the second main body portion 121.

[0155] In some embodiments, the fifth surface 15 and the second surface 12 may be provided with a communicating groove, and the groove extends from the first main body 111 to the direction of the first shaping member 10. The stopper 17 may be provided in the groove of the fifth surface 15 and the second surface 12.

[0156] In some embodiments, in the direction in which the first main body 111 points to the first shaping member 10, the stopper 17 may have an inner surface facing away from the first main body 111 and an outer surface 171 facing the first main body 111. When the first pole tab 112 of the first electrode assembly 110 is shaped, the surface of the first main body 111 extending out of the first pole tab 112 contacts the outer surface 171 of the stopper 17. When the pole tab is shaped, the first main body 111 is moved close to the first shaping member 10 along the second direction X, so that the first main body 111 abuts against the outer surface 171 of the stopper 17, thereby limiting the first main body 111 in the second direction X.

[0157] In some embodiments, in the direction from the first surface 11 to the third surface 21, the limiting member 17 exceeds the first surface 11, that is, when the tab is shaped, the second main body 121 is moved along the second direction X close to the second shaping member 20, so that the second main body 121 abuts against the outer surface 171 of the limiting member 17, thereby limiting the second main body 121 in the second direction X.

[0158] In some embodiments, there may be multiple limiting members 17 , and the multiple limiting members 17 may be arranged at intervals along the third direction Y.

[0159] According to the technical solution of the embodiment of the present application, the limit member 17 extends along the first direction Z, and the outer surface 171 of the limit member 17 can contact the first main body portion 111 and the second main body portion 121, and the outer surface 171 of the limit member 17 is flush with the fifth surface 15, so that the fifth surface 15 can limit the first main body portion 111 and the second main body portion 121 in the second direction X, which is beneficial to improve the effect of the shaping device 1 on the shaping of the electrode assembly 100.

[0160] Please refer to Figures 1 to 5 In some embodiments, in the first direction Z, the second shaping member 20 has a sixth surface 24, and the sixth surface 24 is arranged opposite to the third surface 21. The second shaping member 20 is provided with a through hole 25, and in the first direction Z, the through hole 25 connects the third surface 21 and the sixth surface 24, and the through hole 25 is used to correspond to the adapter 200.

[0161] In some embodiments, in the first direction Z, the second shaping member 20 has a sixth surface 24 , and the sixth surface 24 and the third surface 21 are arranged opposite to each other, that is, the sixth surface 24 extends along the second direction X. In the first direction Z, one end of the fourth surface 22 is connected to one end of the third surface 21 close to the second main body 121 , and the other end of the fourth surface 22 is connected to one end of the sixth surface 24 close to the second main body 121 .

[0162] After the first tab 112 and the second tab 122 are folded together, they need to be connected to the adapter 200, and the connection method is usually welding. In some embodiments, the second shaping member 20 can be provided with a through hole 25, and the through hole 25 can be processed by mechanical processing, such as milling. The through hole 25 is connected to the third surface 21 along the first direction Z from the sixth surface 24.

[0163] When the first electrode tab 112 and the second electrode tab 122 need to be welded to the adapter 200, the execution end for welding is inserted through the sixth surface 24 and passed out from the third surface 21 for welding. The execution end may be a welding nozzle.

[0164] In the technical solution of the embodiment of the present application, the first pole tab 112 and the second pole tab 122 are connected to the adapter 200 by welding. By providing a through hole 25 on the second shaping member 20, and the through hole 25 connecting the third surface 21 and the sixth surface 24, it is convenient for the execution end of the device to realize welding of the first pole tab 112 and the second pole tab 122 with the adapter 200 through the through hole 25, which is conducive to improving the convenience of welding.

[0165] Please refer to Fig.11 and Fig.12 , Fig.11 for Figure 1 A schematic diagram of a third electrode assembly and a fourth electrode assembly, Fig.12 for Fig.11 In some embodiments, the electrode assembly 100 includes a third electrode assembly 130 and a fourth electrode assembly 140 stacked along a first direction Z, the third electrode assembly 130 includes a third main body 131 and a third pole tab 132, the fourth electrode assembly 140 includes a fourth main body 141 and a fourth pole tab 142, in the second direction X, the third pole tab 132 and the fourth pole tab 142 extend from one end of the first main body 111 and the second main body 121 facing the first electrode assembly 110, respectively, and the third pole tab 132 and the fourth pole tab 142 are integrated.

[0166] Please refer to Figures 1 to 5The first shaping member 10 further includes a seventh surface 18, which is arranged opposite to the second surface 12 along the second direction X, and is connected to the first surface 11 to form a third connection 19, and the third connection 19 is used to shape the third pole tab 132. The second shaping member 20 further includes an eighth surface 26, which is arranged opposite to the fourth surface 22 along the second direction X, and is connected to the third surface 21 to form a fourth connection 27, and the fourth connection 27 is used to shape the fourth pole tab 142. In the projection plane perpendicular to the first direction Z, the orthographic projection of the fourth connection 27 is closer to the center of the second shaping member 20 than the orthographic projection of the third connection 19.

[0167] In some embodiments, the battery cell may include two electrode assembly groups, each electrode assembly group includes two electrode assemblies 100, one electrode assembly group includes a first electrode assembly 110 and a second electrode assembly 120, and the other electrode assembly group may include a third electrode assembly 130 and a fourth electrode assembly 140. The two electrode assembly groups are arranged opposite to each other along the second direction X, and the structures and sizes of the two electrode assembly groups may be the same.

[0168] The third electrode assembly 130 and the fourth electrode assembly 140 may have the same structure and size. In the third electrode assembly 130, the third pole tab 132 may extend from one end of the third main body 131 facing the first main body 111 in the second direction X. In the fourth electrode assembly 140, the fourth pole tab 142 may extend from one end of the fourth main body 141 facing the second main body 121 in the second direction X. It should be noted that the third main body 131 and the fourth main body 141 may be located on the same side of the shaping device 1 in the second direction X, the third pole tab 132 may extend from the third main body 131 in the direction of the first shaping member 10, and the fourth pole tab 142 may extend from the fourth main body 141 in the direction of the second shaping member 20.

[0169] The first electrode tab 112 may extend from one end of the first body portion 111 facing the third body portion 131 in the second direction X. In the second electrode assembly 120 , the second electrode tab 122 may extend from one end of the second body portion 121 facing the fourth body portion 141 in the second direction X.

[0170] In some embodiments, one end of the third pole tab 132 can be connected to the third main body 131 , one end of the fourth pole tab 142 can be connected to the fourth main body 141 , and the other end of the third pole tab 132 and the other end of the fourth pole tab 142 can be folded and connected to the adapter 200 .

[0171] In some embodiments, the third electrode assembly 130 may include two third electrode tabs 132 , which may be spaced apart along the third direction Y. The fourth electrode assembly 140 may include two fourth electrode tabs 142 , which may be spaced apart along the third direction Y.

[0172] The two third pole tabs 132 have opposite polarities, and the two fourth pole tabs 142 have opposite polarities. In some embodiments, there may be two adapters 200, and the two adapters 200 may be spaced apart along the third direction Y. One third pole tab 132 and one fourth pole tab 142 have the same polarity and are connected to one adapter 200, and another third pole tab 132 and another fourth pole tab 142 have the same polarity and are connected to another adapter 200.

[0173] It should be noted that the adapter 200 may include two connection ends, the two connection ends are connected at one end in the third direction Y, and the two connection ends are spaced apart at the other end in the third direction Y. One of the two connection ends is connected to a first pole tab 112 and a second pole tab 122 , and the other of the two connection ends is connected to a third pole tab 132 and a fourth pole tab 142 .

[0174] Similarly, in another adapter 200 , one of the two connecting ends is connected to another first pole tab 112 and another second pole tab 122 , and the other of the two connecting ends is connected to another third pole tab 132 and another fourth pole tab 142 .

[0175] It should be noted that the first pole tab 112 , the second pole tab 122 , the third pole tab 132 and the fourth pole tab 142 connected to the same adapter 200 have the same polarity.

[0176] In some embodiments, the first shaping member 10 may include a seventh surface 18, and the seventh surface 18 is disposed opposite to the second surface 12 along the second direction X. It should be noted that the second surface 12 may be disposed in a mirror image with the seventh surface 18 relative to a surface parallel to the second direction X. That is, the angle formed between the second surface 12 and the first surface 11 is the same as the angle formed between the seventh surface 18 and the first surface 11.

[0177] The seventh surface 18 may be located on a side of the first surface 11 facing the third main body portion 131 in the second direction X. An end of the first surface 11 close to the third main body portion 131 in the second direction X is connected to an end of the seventh surface 18 facing the second shaping member 20 in the first direction Z, thereby forming a third connection point 19, that is, the third connection point 19 is a corner of the first shaping member 10.

[0178] Meanwhile, the first shaping member 10 may also have a surface disposed opposite to the fifth surface 15 in the second direction X. It should be noted that the fifth surface 15 may be disposed in a mirror image with respect to the surface parallel to the second direction X.

[0179] In some embodiments, the second shaping member 20 may include an eighth surface 26 , which is disposed opposite to the fourth surface 22 along the second direction X. It should be noted that the fourth surface 22 may be mirrored to the eighth surface 26 relative to a surface parallel to the second direction X.

[0180] The eighth surface 26 may be located on a side of the third surface 21 facing the fourth main body portion 141 in the second direction X. An end of the third surface 21 close to the fourth main body portion 141 in the second direction X is connected to an end of the eighth surface 26 facing the first shaping member 10 in the first direction Z, thereby forming a fourth connection 27, that is, the fourth connection 27 is a corner of the second shaping member 20.

[0181] It should be noted that the third connection 19 may be the location where the first surface 11 and the seventh surface 18 are connected, and the fourth connection 27 may be the location where the third surface 21 and the eighth surface 26 are connected. Alternatively, the first surface 11 and the seventh surface 18 may be connected by an arc transition to reduce the risk of damage to the third pole tab 132 due to stress concentration when the third pole tab 132 is shaped, and the third surface 21 and the eighth surface 26 may be connected by an arc transition to reduce the risk of damage to the fourth pole tab 142 due to stress concentration when the fourth pole tab 142 is shaped, and in this case, the third connection 19 and the fourth connection 27 may be transition arcs.

[0182] In some embodiments, in the direction in which the first shaping member 10 points to the second shaping member 20, the distance between the first surface 11 and the seventh surface 18 in the second direction X may gradually decrease, and the distance between the third surface 21 and the eighth surface 26 in the second direction X may gradually increase, that is, the seventh surface 18 and the eighth surface 26 are inclined surfaces, and the angle between the first surface 11 and the seventh surface 18 and the angle between the third surface 21 and the eighth surface 26 are not right angles.

[0183] Please refer to Figures 8 to 12 The process of shaping the pole lug can be as follows: the first shaping member 10 and the second shaping member 20 are arranged relatively to each other in the first direction Z, a portion of the first pole lug 112 is arranged on the second surface 12, and another portion is arranged on the first surface 11; a portion of the second pole lug 122 is arranged on the fourth surface 22, and another portion is arranged on the second surface 12; a portion of the third pole lug 132 is arranged on the seventh surface 18, and another portion is arranged on the first surface 11; a portion of the fourth pole lug 142 is arranged on the eighth surface 26, and another portion is arranged on the second surface 12.

[0184] The second shaping member 20 is moved along the first direction Z close to the first shaping member 10, so that the first shaping member 10 and the second shaping member 20 clamp and squeeze the first pole ear 112, the second pole ear 122, the third pole ear 132 and the fourth pole ear 142, so that the first pole ear 112 forms a corresponding first bend 113 at the first connection 13, the second pole ear 122 forms a corresponding second bend 123 at the second connection 23, the third pole ear 132 forms a corresponding third bend 133 at the third connection 19, and the fourth pole ear 142 forms a corresponding fourth bend 143 at the fourth connection 27, thereby realizing the shaping of the first pole ear 112, the second pole ear 122, the third pole ear 132 and the fourth pole ear 142.

[0185] In some embodiments, the adapter 200 can be disposed on the first surface 11, and after the first pole tab 112 and the second pole tab 122 are shaped, an end of the first pole tab 112 away from the first main body 111 and an end of the second pole tab 122 away from the second main body 121 are connected, and the connection method can be welding. The first pole tab 112 and the second pole tab 122 are welded to the surface of the adapter 200 away from the first surface 11 in the first direction Z.

[0186] After the third pole tab 132 and the fourth pole tab 142 are shaped, the end of the third pole tab 132 away from the third main body 131 and the end of the fourth pole tab 142 away from the fourth main body 141 are connected, and the connection method can be welding. The third pole tab 132 and the fourth pole tab 142 are welded to the surface of the adapter 200 away from the first surface 11 in the first direction Z.

[0187] In some embodiments, the first shaping member 10 is projected onto a projection plane perpendicular to the first direction Z to obtain an orthographic projection of the third connection 19, that is, the connection of the orthographic projection of the first surface 11 and the orthographic projection of the seventh surface 18. The second shaping member 20 is projected onto a projection plane perpendicular to the second direction X to obtain an orthographic projection of the fourth connection 27, that is, the connection of the orthographic projection of the third surface 21 and the orthographic projection of the eighth surface 26, and at the same time, the orthographic projection of the center of the second shaping member 20 can be obtained.

[0188] In the second direction X, the orthographic projection of the third connection 19 and the orthographic projection of the fourth connection 27 can be staggered, that is, the orthographic projection of the third connection 19 and the orthographic projection of the fourth connection 27 do not overlap, and the distance between the orthographic projection of the fourth connection 27 and the orthographic projection of the center of the second shaping member 20 can be smaller than the distance between the orthographic projection of the third connection 19 and the orthographic projection of the center of the first shaping member 10.

[0189] Please refer to Fig.13 , Fig.13FIG. 1 is a schematic diagram of the third electrode assembly and the fourth electrode assembly in another state. In some embodiments, after the tab shaping process, the electrode assembly 100 needs to be turned over.

[0190] The third electrode assembly 130 and the fourth electrode assembly 140 can be removed from the shaping device 1 , and the adapter 200 is retained.

[0191] The third electrode assembly 130 and the fourth electrode assembly 140 can be flipped 90°. Before flipping, the third main body 131 and the fourth main body 141 are located on one side of the adapter 200 in the second direction X. After flipping, the third main body 131 and the fourth main body 141 are located on one side of the adapter 200 in the first direction Z, and the third main body 131 and the fourth main body 141 face the surface of the adapter 200 to weld the third pole ear 132 and the fourth pole ear 142.

[0192] Since the fourth connection 27 is closer to the center of the second shaping member 20 than the third connection 19 , in the flipped third electrode assembly 130 and the fourth electrode assembly 140 , in the first direction Z, the fourth bend 143 is closer to the adapter 200 than the third bend 133 .

[0193] After the adapter 200, the third electrode assembly 130 and the fourth electrode assembly 140 are flipped 180°, the adapter 200 is moved along the first direction Z close to the third main body 131 and the fourth main body 141. At this time, the third pole ear 132 and the fourth pole ear 142 are compressed, and the third bend 133 and the fourth bend are close to each other in the second direction X, wherein the third bend 133 and the fourth bend 143 are staggered with each other in the first direction Z, thereby providing an avoidance space for the third bend 133 and the fourth bend 143 in the second direction X, reducing the risk of the third bend 133 squeezing the fourth bend 143 so that the fourth bend 143 is inserted into the fourth main body 141.

[0194] In some embodiments, the first surface 11 and the seventh surface 18 may be connected by an arc, wherein the radius of the arc may be 1 mm.

[0195] In some embodiments, the arc connecting the first surface 11 and the seventh surface 18 may have the same structure and size as the first arc surface 14 .

[0196] In some embodiments, in the first direction Z, one end of the seventh surface 18 can be connected to the first surface 11 , and the other end can be connected to another surface, which extends along the first direction Z and is arranged opposite to the fifth surface 15 , and is used to contact the third main body portion 131 .

[0197] The number of the limiting members 17 can be multiple, a portion of the limiting members 17 is disposed on the fifth surface 15 , and another portion of the limiting members 17 is disposed on the surface. The other portion of the limiting members 17 is used to contact the third main body portion 131 and the fourth main body portion 141 .

[0198] According to the technical solution of the embodiment of the present application, the third pole tab 132 is shaped by the third connection 19 of the third shaping member so that the third pole tab 132 forms a third bend 133, and the fourth pole tab 142 is shaped by the fourth connection 27 of the fourth shaping member so that the fourth pole tab 142 forms a fourth bend 143, so that the third pole tab 132 and the fourth pole tab 142 are connected to the adapter 200. At the same time, on the projection plane perpendicular to the first direction Z, the orthographic projection of the fourth connection 27 is closer to the center of the second shaping member 20 than the orthographic projection of the third connection 19, so that the fourth bend 143 is closer to the center of the second shaping member 20 than the third bend 133. In the subsequent process of the battery device production, it is helpful to reduce the risk of the fourth bend 143 being inserted into the fourth main body 141, thereby helping to reduce the risk of short circuit of the fourth electrode assembly 140, and helping to improve the reliability of the battery device.

[0199] An embodiment of the present application also provides a battery production line, comprising the shaping device 1 of any one of the above embodiments.

[0200] Please refer to Figure 1 , Figure 4 , Figure 5 , Figures 8 to 13 In some embodiments, the electrode assembly 100 includes two groups of electrode assembly groups relatively arranged along the second direction X, one group of electrode assembly groups includes a first electrode assembly 110 and a second electrode assembly 120 stacked along the first direction Z, and the other group of electrode assembly groups includes a third electrode assembly 130 and a fourth electrode assembly 140 stacked along the first direction Z, and the first direction Z and the second direction X are perpendicular to each other.

[0201] The first electrode assembly 110 includes a first main body 111 and a first pole ear 112, and the second electrode assembly 120 includes a second main body 121 and a second pole ear 122. In the second direction X, the first pole ear 112 extends from one end of the first main body 111 facing the third main body 131, and the second pole ear 122 extends from one end of the second main body 121 facing the fourth main body 141. The first pole ear 112 and the second pole ear 122 are integrated into one.

[0202] The third electrode assembly 130 includes a third main body 131 and a third pole ear 132, and the fourth electrode assembly 140 includes a fourth main body 141 and a fourth pole ear 142. In the second direction X, the third pole ear 132 extends from one end of the third main body 131 facing the first main body 111, and the fourth pole ear 142 extends from one end of the fourth main body 141 facing the second main body 121, and the third pole ear 132 and the fourth pole ear 142 are integrated into one.

[0203] In some embodiments, the first shaping member 10 may include a first surface 11, a second surface 12, and a seventh surface 18. The first surface 11 may extend along the second direction X, and the adapter 200 is disposed on the first surface 11. The second surface 12 may be located on a side of the first surface 11 facing the first main body 111 in the second direction X, and the seventh surface 18 may be located on a side of the first surface 11 facing the third main body 131 in the second direction X. An end of the first surface 11 close to the first main body 111 in the second direction X is connected to an end of the second surface 12 facing the second shaping member 20 in the first direction Z, thereby forming a first connection 13, and the first connection 13 is used to shape the first pole tab 112. An end of the first surface 11 close to the third main body 131 in the second direction X is connected to an end of the seventh surface 18 facing the second shaping member 20 in the first direction Z, thereby forming a third connection 19, and the third connection 19 is used to shape the third pole tab 132.

[0204] In some embodiments, the second shaping member 20 may include a third surface 21, a fourth surface 22, and an eighth surface 26. The third surface 21 may extend along the second direction X, and in the first direction Z, the first surface 11 and the third surface 21 are arranged opposite to each other, the fourth surface 22 may be located on the side of the third surface 21 facing the second main body 121 in the second direction X, and the eighth surface 26 may be located on the side of the third surface 21 facing the fourth main body 141 in the second direction X. An end of the third surface 21 close to the second main body 121 in the second direction X is connected to an end of the fourth surface 22 facing the first shaping member 10 in the first direction Z, thereby forming a second connection 23, and the second connection 23 is used to shape the second pole tab 122. An end of the third surface 21 close to the fourth main body 141 in the second direction X is connected to an end of the eighth surface 26 facing the first shaping member 10 in the first direction Z, thereby forming a fourth connection 27, and the fourth connection 27 is used to shape the fourth pole tab 142.

[0205] In some embodiments, the first shaping member 10 is projected onto a projection plane perpendicular to the first direction Z to obtain an orthographic projection of the first connection 13 and an orthographic projection of the third connection 19. The second shaping member 20 is projected onto a projection plane perpendicular to the first direction Z to obtain an orthographic projection of the second connection 23 and an orthographic projection of the fourth connection 27, and at the same time, an orthographic projection of the center of the second shaping member 20 can be obtained.

[0206] In the second direction X, the distance between the orthographic projection of the second connection 23 and the orthographic projection of the center of the second shaping member 20 may be smaller than the distance between the orthographic projection of the first connection 13 and the orthographic projection of the center of the first shaping member 10; the distance between the orthographic projection of the fourth connection 27 and the orthographic projection of the center of the second shaping member 20 may be smaller than the distance between the orthographic projection of the third connection 19 and the orthographic projection of the center of the first shaping member 10.

[0207] According to the technical solution of the embodiment of the present application, the first pole ear 112 is shaped by the first connection 13 of the first shaping member 10 so that the first pole ear 112 forms a first bend 113, and the second pole ear 122 is shaped by the second connection 23 of the second shaping member 20 so that the second pole ear 122 forms a second bend 123, so that the first pole ear 112 and the second pole ear 122 are connected to the surface of the adapter 200 away from the first surface 11. At the same time, on the projection plane perpendicular to the first direction Z, the orthographic projection of the second connection 23 is closer to the center of the second shaping member 20 than the orthographic projection of the first connection 13, so that the second bend 123 is closer to the center of the second shaping member 20 than the first bend 113. The third pole tab 132 is shaped by the third connection 19 of the first shaping member 10 so that the third pole tab 132 forms a third bend 133, and the fourth pole tab 142 is shaped by the fourth connection 27 of the fourth shaping member so that the fourth pole tab 142 forms a fourth bend 143, so that the third pole tab 132 and the fourth pole tab 142 are connected to the surface of the adapter 200 away from the first surface 11. At the same time, on the projection plane perpendicular to the first direction Z, the orthographic projection of the fourth connection 27 is closer to the center of the second shaping member 20 than the orthographic projection of the third connection 19, so that the fourth bend 143 is closer to the center of the second shaping member 20 than the third bend 133.

[0208] In the subsequent process of producing the battery device, the first main body 111 and the second main body 121 are flipped around the position where the first pole ear 112 and the second pole ear 122 are connected to the adapter 200, and the third main body 131 and the fourth main body 141 are flipped around the position where the third pole ear 132 and the fourth pole ear 142 are connected to the adapter 200. When flipping, the bending trends of the third bend 133 and the fourth bend 143 are retained, so that the bending trends of the first bend 113 and the second bend 123 are in opposite directions, and the bending trends of the third bend 133 and the fourth bend 143 are in opposite directions. After the rotation, the first main body 111 extends out of the end surface of the first pole ear 112 and the second main body 121 extends out of the end surface of the second pole ear 122, facing the surface of the adapter 200 connecting the first pole ear 112 and the second pole ear 122, and the third main body 131 extends out of the end surface of the third pole ear 132 and the fourth main body 141 extends out of the end surface of the fourth pole ear 142, facing the surface of the adapter 200 connecting the third pole ear 132 and the fourth pole ear 142, the second bend 123 is closer to the adapter 200 than the first bend 113 in the first direction Z, and the fourth bend 143 is closer to the adapter 200 than the third bend 133 is closer to the adapter 200 in the first direction Z. When the adapter 200 is moved along the first direction Z toward the first main body 111 and the second main body 121, due to the opposite bending trends, in the second direction X, the second bend 123 moves toward the direction close to the first bend 113, and the first bend 113 moves toward the direction close to the second bend 123. Since the first bend 113 and the second bend 123 are staggered in the first direction Z, the risk of mutual extrusion between the first bend 113 and the second bend 123 is small. In the second direction X, the fourth bend The third bend 143 moves toward the direction close to the third bend 133, and the third bend 133 moves toward the direction close to the fourth bend 143. Since the third bend 133 and the fourth bend 143 are staggered in the first direction Z, the risk of the third bend 133 and the fourth bend 143 being squeezed against each other is smaller, which can help reduce the risk of the second bend 123 and the fourth bend 143 being squeezed and inserted into the second main body 121, reduce the risk of short circuit in the second electrode assembly 120, and improve the reliability of the battery cell, thereby improving the reliability of the battery device.

[0209] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A shaping device for shaping a pole ear of an electrode assembly, wherein the electrode assembly comprises a first electrode assembly and a second electrode assembly stacked along a first direction, the first electrode assembly comprises a first main body and a first pole ear, the second electrode assembly comprises a second main body and a second pole ear, in a second direction, the first pole ear and the second pole ear extend from one end of the same side of the first main body and the second main body respectively, the first pole ear and the second pole ear are gathered together, the first direction and the second direction are perpendicular to each other, and the device is characterized in that: The shaping device comprises: A first shaping member and a second shaping member arranged along the first direction, the first shaping member comprising a first surface and a second surface, the first surface being used for placing an adapter, the second surface being located to the side of the first surface in the second direction, one end of the first surface in the second direction and one end of the second surface in the first direction close to the second shaping member are connected to form a first connection, and the first connection is used for shaping the first tab; The second shaping member includes a third surface and a fourth surface. In the first direction, the first surface and the third surface are arranged opposite to each other, the fourth surface is located on the side of the third surface in the second direction, and one end of the third surface in the second direction is connected to one end of the fourth surface in the first direction close to the first shaping member to form a second connection point, and the second connection point is used for shaping the second pole ear; Wherein, on a projection plane perpendicular to the first direction, an orthographic projection of the second connection is closer to a center of the second shaping member than an orthographic projection of the first connection.

2. The shaping device according to claim 1, characterized in that: In the second direction, a distance D1 between the first connection point and the second connection point satisfies the condition: 0.5 mm ≤ D1 ≤ 4 mm.

3. The shaping device according to claim 2, characterized in that: 1mm≤D1≤2mm.

4. The shaping device according to claim 1, characterized in that: The first surface extends along the second direction, the second surface is inclined with respect to the first surface, and an angle α between the first surface and the second surface satisfies the condition: 75°≤α≤85°.

5. The shaping device according to claim 4, characterized in that: 79°≤α≤82°。 6. The shaping device according to claim 1, characterized in that: The first shaping member further includes a first arc surface, the first arc surface connects the first surface and the second surface, and a radius R1 of the first arc surface satisfies the condition: 0.5 mm ≤ R1 ≤ 3 mm.

7. The shaping device according to claim 6, characterized in that: 0.8mm≤R1≤1.5mm.

8. The shaping device according to claim 1, characterized in that: The first shaping member further includes a fifth surface, the fifth surface extending along the first direction, the fifth surface connected to an end of the second surface away from the first surface, and the fifth surface is used to contact the first main body.

9. The shaping device according to claim 8, characterized in that: The first shaping member further includes a second arc surface, and the second arc surface connects the fifth surface and the second surface.

10. The shaping device according to claim 1, characterized in that: In the first direction, the size of the second surface is D2, which satisfies the condition: 5 mm ≤ D2 ≤ 20 mm.

11. The shaping device according to claim 8, characterized in that: The first shaping member further includes a limiting member, which extends along the first direction. The limiting member is arranged at one end of the first shaping member in the second direction. In the second direction, the limiting member has an outer surface which faces away from the center of the first shaping member, and the outer surface is flush with the fifth surface. In the direction from the first surface to the third surface, the limiting member exceeds the first surface, and the limiting member is used to contact the first main body portion and the second main body portion.

12. The shaping device according to claim 1, characterized in that: In the first direction, the second shaping member has a sixth surface, and the sixth surface is arranged opposite to the third surface; The second shaping member is provided with a through hole, and in the first direction, the through hole communicates with the third surface and the sixth surface, and the through hole is used to correspond to the adapter.

13. The shaping device according to any one of claims 1 to 12, characterized in that: The electrode assembly includes a third electrode assembly and a fourth electrode assembly stacked along the first direction, the third electrode assembly includes a third main body and a third electrode tab, the fourth electrode assembly includes a fourth main body and a fourth electrode tab, in the second direction, the third electrode tab and the fourth electrode tab extend from one end of the first main body and the second main body facing the first electrode assembly respectively, and the third electrode tab and the fourth electrode tab are integrated into one body, The first shaping member further includes a seventh surface, the seventh surface and the second surface are arranged opposite to each other along the second direction, the seventh surface is connected to the first surface to form a third connection point, and the third connection point is used to shape the third electrode tab; The second shaping member further includes an eighth surface, the eighth surface and the fourth surface are arranged opposite to each other along the second direction, the eighth surface is connected to the third surface to form a fourth connection point, and the fourth connection point is used to shape the fourth electrode tab; Wherein, on a projection plane perpendicular to the first direction, the orthographic projection of the fourth connection point is closer to the center of the second shaping member than the orthographic projection of the third connection point.

14. A battery device production line, characterized in that: Comprising a shaping device as claimed in any one of claims 1 to 13.

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