Shaping die, welding device, production equipment and battery monomer

Abstract

The embodiment of the invention provides a shaping mold, a welding device, production equipment and a battery monomer, the shaping mold is used in a welding process of a tab and an adapter of an electrode assembly, and the shaping mold comprises a mold main body and a shaping part. At least one side of the mold main body in the first direction is connected with a shaping part, the shaping part is used for abutting against the tab to shape the tab, the shaping part is provided with a first wall, a second wall and a side wall connected between the first wall and the second wall, the second wall is arranged towards the mold main body in the first direction, and in the second direction, the orthographic projection of the second wall extends in the first direction; the extension direction of the orthographic projection of the first wall intersects with the first direction. Wherein the side wall is provided with a protruding part protruding back to the mold body, and the first direction intersects with the second direction. According to the invention, the quality of the battery monomer is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a shaping mold, a welding device, a production equipment and a battery cell. Background Art

[0002] Battery monomers are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In the development of battery technology, how to improve the quality of battery cells is a technical problem that needs to be solved urgently. Summary of the invention

[0004] In view of the above problems, the present application provides a shaping mold, a welding device, a production equipment and a battery cell, which are conducive to improving the quality of the battery cell.

[0005] In the first aspect, the present application provides a shaping mold for use in the welding process of the electrode ear and the adapter of the electrode assembly, characterized in that the shaping mold comprises: a mold body; a shaping portion, the mold body is connected to the shaping portion on at least one side along the first direction, the shaping portion is used to press the electrode ear to shape the electrode ear, the shaping portion has a first wall, a second wall and a side wall connected between the first wall and the second wall, the second wall is arranged toward the mold body along the first direction, in the second direction, the orthographic projection of the second wall extends along the first direction, and the extension direction of the orthographic projection of the first wall intersects with the first direction; wherein the side wall has a convex portion protruding away from the mold body, and the first direction intersects with the second direction.

[0006] In some embodiments of the first aspect, the shaping mold includes a mold body and a shaping part, the shaping part has a first wall, a side wall and a second wall connected in sequence, the side wall has a convex part protruding away from the mold body, when the shaping mold moves toward the pole ear so that the shaping part presses the pole ear, the convex part can press against the root of the pole ear, so that the root of the pole ear is closer to the main body of the electrode assembly after shaping, which is beneficial to reduce the phenomenon that the pole ear tends to fold inward during the core assembly process of the electrode assembly, thereby helping to reduce the possibility of redundancy or cracking of the pole ear, and further helping to improve the quality of the battery cell after core assembly.

[0007] In some embodiments, in the height direction of the shaping mold, the orthographic projection of the first wall does not overlap with the orthographic projection of the second wall, and in the first direction, the minimum distance between the vertex of the protrusion and the first wall is less than or equal to the minimum distance between the vertex of the protrusion and the second wall, and the height direction, the first direction and the second direction intersect each other.

[0008] By configuring in the above manner, the apex of the protrusion of the shaping portion can be closer to the root of the electrode lug during the process of pressing the electrode lug, so as to press the root of the electrode lug closer to the main body of the electrode assembly.

[0009] In some embodiments, the side wall includes a first side wall and a second side wall that are intersectingly arranged, the connection between the first side wall and the second side wall is the vertex of the convex portion, and the angle α between the first side wall and the second side wall satisfies: 90°≤α<180°.

[0010] In the above technical solution, by setting the included angle α between the first side wall and the second side wall to an obtuse angle, the shape of the shaping portion can better match the tab.

[0011] In some embodiments, 90°≤α≤98°.

[0012] In the above technical solution, by setting the angle α between the first side wall and the second side wall between 90° and 98°, the redundancy or cracking of the tab after core closing can be reduced while ensuring the reliability of the tab when the shaping part presses against the tab.

[0013] In some embodiments, 92°≤α≤94°. By further setting the angle α between the first side wall and the second side wall between 92° and 94°, the possibility of redundancy or cracking of the tab can be further reduced, which is conducive to further improving the quality of the battery cell after the core is assembled.

[0014] In some embodiments, in the second direction, the extension direction of the orthographic projection of the first side wall intersects with the extension direction of the orthographic projection of the first wall, and the extension direction of the orthographic projection of the second side wall intersects with the first direction. Such a design can make the structure of the shaping part meet the requirements.

[0015] In some embodiments, in the second direction, the orthographic projection of the first wall extends along the height direction of the shaping mold, and the height direction, the first direction and the second direction intersect each other. Such a design can make the structure of the shaping part meet the requirements.

[0016] In some embodiments, in the second direction, the extension direction of the orthographic projection of the first side wall is parallel to the extension direction of the orthographic projection of the first wall, and the extension direction of the second side wall is parallel to the first direction. Such a design can make the structure of the shaping part meet the requirements.

[0017] In some embodiments, in the second direction, the extension direction of the orthographic projection of the first side wall intersects with the height direction of the shaping mold, and the height direction, the first direction and the second direction intersect with each other. Such a design can make the structure of the shaping part meet the requirements.

[0018] In some embodiments, a shaping portion is connected to either side of the mold body along the first direction, and the shaping portions are arranged in pairs and are mirror-symmetrical about the center line of the mold body.

[0019] In the above technical solution, the shaping mold can simultaneously shape the tabs of the electrode assembly located on both sides thereof along the first direction, which is beneficial to improving the shaping efficiency.

[0020] In some embodiments, at least one of the mold body and the shaping portion has a connecting hole that passes through the height direction of the shaping mold, and the connecting hole is configured to provide a channel for welding the pole ear and the adapter, and the height direction, the first direction and the second direction intersect each other.

[0021] In the above technical solution, the shaping mold not only has the function of shaping the pole lug, but also can serve as a fixing and positioning component in the welding process of the pole lug and the adapter, which is conducive to improving the versatility of the shaping mold.

[0022] In some embodiments, the shaping part is provided with a connecting hole; or the connecting hole includes a first hole provided in the mold body and a second hole provided in the shaping part, and the first hole is connected to the second hole. The above arrangement is conducive to improving the flexibility of the shaping mold.

[0023] In some embodiments, the mold body has a first recessed portion that is recessed inward on one side surface along the height direction, the adapter includes a transfer body and a connecting portion connected to the transfer body on either side along the first direction, the transfer body protrudes from the connecting portion along the height direction, and the first recessed portion is configured to accommodate the transfer body.

[0024] In the above technical solution, during the process of the shaping mold pressing against the tab, the adapter body protruding from the adapter can be accommodated in the first recess to prevent the mold body from overpressing the adapter body.

[0025] In some embodiments, the dimension H of the first recess in the height direction satisfies: 0<H<8mm. By setting in this way, the reliability of the adapter can be ensured.

[0026] In some embodiments, 2 mm ≤ H ≤ 4 mm. By setting in this way, the reliability of the adapter can be further ensured.

[0027] In some embodiments, the mold body further has a second recessed portion that is recessed from the bottom wall of the first recessed portion toward the first recessed portion, and in the height direction, the orthographic projection of the second recessed portion falls into the middle position of the first recessed portion.

[0028] In the above technical solution, the first recess can position and fix the connection position between the adapter body and the connecting part, which is helpful to prevent the adapter from warping. The setting of the second recess can prevent part of the adapter body from contacting the mold body to ensure the safety of the adapter body.

[0029] In a second aspect, the present application further provides a welding device, comprising: a shaping mold provided according to any embodiment of the first aspect; and a welding mechanism configured to weld the tab and the adapter after being shaped by the shaping mold.

[0030] In a third aspect, the present application also provides a production equipment, comprising a welding device provided according to any embodiment of the second aspect.

[0031] In the fourth aspect, the present application also provides a battery cell, comprising: a shell; an electrode assembly, accommodated in the shell, the electrode assembly comprising a main body and a pole ear connected to each other, the shape of the pole ear being formed by a shaping mold provided by any embodiment of the first aspect; a adapter, accommodated in the shell, the adapter being connected to the shell and the pole ear; wherein, in the height direction of the shell, an angle β between a side surface of the pole ear facing the main body and a side surface of the main body facing the pole ear satisfies: 0°≤β≤40°.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0034] Figure 1 A partial cross-sectional view of a shaping mold provided in some embodiments of the present application when in operation; Figure 2 A partial cross-sectional view of a shaping mold provided in some embodiments of the present application when in operation; Figure 3 A schematic diagram of a partial structure of a battery cell in the related art; Figure 4 A schematic diagram of a partial structure of a battery cell provided in some embodiments of the present application; Figure 5 A schematic diagram of the explosion structure of the shaping mold provided in other embodiments of the present application when working; Figure 6 Based Figure 5 The enlarged schematic diagram of P in the middle; Figure 7A schematic diagram of a partial structure of a shaping mold provided by some embodiments of the present application when in operation; Figure 8 A schematic diagram of the partial structure of a shaping mold provided in some embodiments of the present application when in operation.

[0035] The reference numerals of the specific embodiments are as follows: 100, shaping mold; 200, electrode assembly; 201, pole ear; 202, main body; 300, adapter; 301, adapter body; 302, connecting part; 400, end cap; 10. Mold body; 101. First concave portion; 102. Second concave portion; 20, shaping portion; 21, first wall; 22, second wall; 23, side wall; 231, first side wall; 232, second side wall; 2301, convex portion; 2001, connecting hole; X, first direction; Y, second direction; Z, height direction. DETAILED DESCRIPTION

[0036] 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 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.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings 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.

[0038] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0039] 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.

[0040] 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.

[0041] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0042] The term “plurality” used in this application refers to two or more (including two).

[0043] In the process of preparing battery cells, the welded adapter and electrode assembly need to be joined together. Joining together can be understood as the process of assembling and fixing the electrode assembly of the battery cell. In the process of joining together, the electrode assembly needs to be rotated significantly, so that the tabs also rotate significantly, so that the various electrode assemblies can be accurately combined together. However, in the related art, the tabs of the battery cells are prone to redundancy or even breakage during the rotation process, thereby affecting the quality of the battery cells after joining together.

[0044] Based on the above technical problems, an embodiment of the present application provides a shaping mold, which includes a mold body and a shaping part. By providing a convex part on the side wall of the shaping part, when the shaping mold moves toward the pole ear so that the shaping part presses the pole ear, the convex part can press against the root of the pole ear, so that the root of the pole ear is closer to the main body of the electrode assembly after shaping, which is beneficial to reduce the phenomenon that the pole ear tends to fold inward during the core assembly process of the electrode assembly, thereby helping to reduce the possibility of redundancy or cracking of the pole ear, and further helping to improve the quality of the battery cell after core assembly.

[0045] Please also read Figures 1 to 4According to an embodiment of the present application, a shaping mold 100 is provided, which is used in the welding process of the pole ear 201 of the electrode assembly 200 and the adapter 300. The shaping mold 100 includes a mold body 10 and a shaping portion 20. The shaping portion 20 is connected to at least one side of the mold body 10 along the first direction X. The shaping portion 20 is used to press the pole ear 201 to shape the pole ear 201. The shaping portion 20 has a first wall 21, a second wall 22, and a side wall 23 connected between the first wall 21 and the second wall 22. The second wall 22 is arranged toward the mold body 10 along the first direction X. In the second direction Y, the orthographic projection of the second wall 22 extends along the first direction X, and the extension direction of the orthographic projection of the first wall 21 intersects with the first direction X. Among them, the side wall 23 has a convex portion 2301 protruding away from the mold body 10, and the first direction X intersects with the second direction Y.

[0046] It can be understood that the electrode assembly 200 includes a main body 202 and a tab 201 , and the main body 202 may include a positive electrode sheet, a negative electrode sheet, a separator, and the like.

[0047] In the embodiment of the present application, the first direction X, the second direction Y and the height direction Z may be perpendicular to each other. The first direction X may be the length direction of the shaping mold 100 , and the second direction Y may be the width direction of the shaping mold 100 .

[0048] Before shaping the pole lug 201 of the electrode assembly 200, the electrode assembly 200 can be placed on a base so that the pole lug 201 is located on one side of the main body 202 along the first direction X. The shaping mold 100 is located above the electrode assembly 200 along the height direction Z. The shaping mold 100 can move toward the pole lug 201 so that the shaping portion 20 presses against the pole lug 201 to shape it. "Shaping" refers to changing the shape of the pole lug 201. In the embodiment of the present application, under the action of the shaping mold 100, the pole lug 201 will be pressed downward to change its shape.

[0049] When the shaping mold 100 is shaping the tab 201, the mold body 10 will also press the tab 201. Specifically, the tab 201 has a root and a head. Figure 2 As shown, the root portion refers to the portion connected to the main body 202, and the head portion refers to the portion connected to the root portion and facing away from the main body 202. Figure 2 , Figure 5 , Figure 7 and Figure 8 In the embodiment of the present invention, the mold body 10 and the shaping part 20 are distinguished by section lines in different directions. The shaping part 20 in the embodiment of the present invention can press the root of the tab 201, and the mold body 10 can press the head of the tab 201, so that the tab 201 will form a shape that expands downward along the height direction Z after shaping.

[0050] See also Figure 2 , Figure 4 and Figure 5 The shaping portion 20 has a first wall 21, a second wall 22 and a side wall 23. The first wall 21 can be understood as a wall facing the main body 202 along the first direction X during the shaping of the tab 201. The second wall 22 can be understood as a wall facing the head of the tab 201 along the height direction Z during the shaping of the tab 201. The side wall 23 can be understood as a wall facing the root of the tab 201. "The second wall 22 is arranged along the first direction X toward the mold body 10" means that the second wall 22 is closer to the mold body 10 than the first wall 21 and the side wall 23. "The convex portion 2301" can be understood as that in the second direction Y, the positive projection of the side wall 23 provided with the convex portion 2301 is a broken line structure or an arc structure.

[0051] like Figure 3 As shown, Figure 3 is a schematic diagram of a partial structure of a battery cell in the related art, Figure 3 The shape of the middle pole piece 200' is the shape after being shaped by the shaping mold in the related art. The pole piece 200' includes a pole piece lug 201' and a pole piece body 202' connected to each other. The pole piece lug 201' is a part extending from the pole piece body 202'. The shape of the pole piece lug 201' can be understood as the shape after being shaped by the shaping mold in the related art and then undergoing the core closing process. After the shaping mold in the related art shapes the pole piece lug 201', the pole piece lug The deformation of the root of the ear 201' is small, and the angle between it and the pole piece body 202' is large. In the subsequent core assembly process, when the pole piece lug 201' is folded, the angle β1 between it and the surface of the pole piece body 202' facing the pole piece lug 201' is too large, so that the pole piece lug 201' has a large inward folding tendency, which can easily lead to redundancy or breakage of the pole piece. In addition, the pole piece lug 201' with an inward folding tendency will also affect the reliability of the battery cell in the related technology during service.

[0052] The embodiment of the present application is different from the embodiment of the present application. In the embodiment of the present application, by providing a convex portion 2301 protruding away from the mold body 10 on the side wall 23, during the shaping process of the pole ear 201, the convex portion 2301 can press the root of the pole ear 201 to make it move toward the main body 202, and the root of the pole ear 201 can be closer to the main body 202. This structure is used in the subsequent core closing process, such as Figure 4 As shown, Figure 4 A partial structural entity diagram of a battery cell provided in an embodiment of the present application, Figure 4The shape of the middle pole ear 201 can be understood as the shape after being shaped by the shaping mold 100 provided in the embodiment of the present application and then undergoing the core assembly process, wherein β can be understood as the angle between the side surface of the pole ear 201 facing the main body 202 and the side surface of the main body 202 facing the pole ear 201 in the height direction of the battery cell, or it can also be understood as the angle between the root of the pole ear 201 and the side surface of the main body 202 facing the pole ear 201, wherein β<β1, the root of the pole ear 201 has a small or even no inward folding tendency when folded, so that the pole ear 201 is not prone to redundancy or breakage. The pole ear 201 of the electrode assembly 200 shaped by the shaping mold 100 provided in the embodiment of the present application can reduce or avoid redundancy or cracking of the pole ear 201 whether in the actual core assembly process or in the subsequent service process.

[0053] The height direction of the battery cell may be the first direction X in the present application.

[0054] It should be noted that the angle between the tab and the main body of the battery cell can be detected by a detection device such as a CT device. Figure 3 In the battery cell shown in the related technology, β1 satisfies about 45°, and in the battery cell formed by the pole ear 201 after being shaped by the shaping mold 100 provided in the embodiment of the present application, the value range of β can be satisfied between 0 and 40°. It can be understood that the smaller the angle between the side surface of the pole ear 201 facing the main body 202 and the side surface of the main body 202 facing the pole ear 201, the lower the risk of redundancy or breakage of the pole ear 201.

[0055] The shape of the shaping mold 100 is closely related to the effect of the pole lug 201 after shaping, and directly affects whether the pole lug 201 will be redundant or cracked during the subsequent core assembly process. Therefore, some shaping molds 100 provided in the embodiments of the present application, when the shaping mold 100 moves toward the pole lug 201 so that the shaping portion 20 presses against the pole lug 201, the protrusion 2301 can press against the root of the pole lug 201, so that the root of the pole lug 201 is closer to the main body 202 of the electrode assembly 200 after shaping, which is beneficial to reduce the phenomenon that the root of the pole lug 201 of the electrode assembly 200 has an inward folding tendency during the core assembly process, thereby helping to reduce the possibility of redundancy or cracking of the pole lug 201, and further helping to improve the quality of the battery cell after the core assembly.

[0056] 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.

[0057] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0058] In some optional embodiments, the mold body 10 and the shaping part 20 are an integrated structure, which is beneficial to improve the overall strength of the shaping mold 100 and is convenient for processing and manufacturing.

[0059] The shaping mold 100 can be directly manufactured by injection molding, blow molding, compression molding or thermoforming, or the preliminary shape of the shaping mold 100 can be manufactured by any of the above processes and then shaped and corrected. For example, the wall of the preliminary shape of the shaping mold 100 can be cut to meet the size and shape requirements of the first wall 21, the second wall 22 and the side wall 23.

[0060] Optionally, the mold body 10 and the shaping part 20 can also be provided separately, so as to improve the flexibility of use.

[0061] Optionally, the number of the protrusions 2301 may be one or more.

[0062] In some optional embodiments, in the height direction Z of the shaping mold 100, the orthographic projection of the first wall 21 does not overlap with the orthographic projection of the second wall 22, and in the first direction X, the minimum distance between the vertex of the protrusion 2301 and the first wall 21 is less than or equal to the minimum distance between the vertex of the protrusion 2301 and the second wall 22, and the height direction Z, the first direction X, and the second direction Y intersect each other.

[0063] By configuring in the above manner, the apex of the protrusion 2301 can be closer to the root of the pole lug 201 during the process of the shaping portion 20 pressing against the pole lug 201, so that the root of the pole lug 201 can be pressed closer to the main body 202 of the electrode assembly 200, which is helpful to reduce or avoid the inward folding tendency of the root of the pole lug 201 during the core closing process.

[0064] The orthographic projection of the side wall 23 in the second direction Y may be a zigzag structure, and the intersection of two adjacent lines in the zigzag structure is the vertex of the convex portion 2301. The orthographic projection of the side wall 23 in the second direction Y may also be an arc-shaped line, and the point on the arc-shaped line with the maximum distance perpendicular to the line connecting the two end points of the arc-shaped line is the vertex of the convex portion 2301.

[0065] See also Figure 5 and Figure 6In some optional embodiments, the side wall 23 includes a first side wall 231 and a second side wall 232 that are intersectingly arranged, the connection point of the first side wall 231 and the second side wall 232 is the vertex of the protrusion 2301, and the angle α between the first side wall 231 and the second side wall 232 satisfies: 90°≤α<180°.

[0066] The angle α between the first side wall 231 and the second side wall 232 may be understood as the angle, in the second direction Y, between an extension plane where the orthographic projection of the first side wall 231 is located and an extension plane where the orthographic projection of the second side wall 232 is located.

[0067] The shaping mold 100 provided in some embodiments of the present application sets the angle α between the first side wall 231 and the second side wall 232 to an obtuse angle, so that the shape of the shaping portion 20 can better match the pole lug 201, so that when the shaping mold 100 is shaping the pole lug 201, the shaping portion 20 can press the root of the pole lug 201 closer to the main body 202.

[0068] By configuring in the above manner, the angle β between the side surface of the tab 201 facing the main body 202 and the side surface of the main body 202 facing the tab 201 in the battery cell can be within a range of 0 to 40°, including the validity of the two endpoint values ​​of 0 and 40°.

[0069] In some embodiments, the angle α between the first side wall 231 and the second side wall 232 satisfies: 90°≤α≤100°.

[0070] In some embodiments, the angle α between the first side wall 231 and the second side wall 232 satisfies: 90°≤α≤98°.

[0071] As an example, the angle α may be, but is not limited to, 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, etc.

[0072] It can be understood that if the angle α is set too small, that is, α<90°, the end of the first wall 21 connected to the side wall 23 that is away from the side wall 23 will be tilted toward the mold body 10. During the process of the shaping mold 100 shaping the pole ear 201, the first wall 21 cannot be close to the root of the pole ear 201, which may cause pulling of the root of the pole ear 201; if the angle α is set too large, that is, α>98°, during the process of the shaping mold 100 shaping the pole ear 201, the apex of the protrusion 2301 will not press the root of the pole ear 201 closer to the main body 202. In the subsequent core assembly process, the pole ear 201 still has a high risk of redundancy or breakage.

[0073] Therefore, by setting the angle α between the first side wall 231 and the second side wall 232 between 90° and 98°, including the two endpoint values ​​of 90° and 98°, the redundancy or cracking of the pole ear 201 after the core is assembled can be reduced, and the reliability of the pole ear 201 when the shaping part 20 presses against the pole ear 201 can be ensured.

[0074] After testing, it was found that when the angle α between the first side wall 231 and the second side wall 232 is in the range of 90° to 98°, and includes the two endpoint values ​​of 90° and 98°, in the battery cell formed by the pole ear 201 after being shaped by the shaping mold 100 under this structure, the angle β between the side surface of the pole ear 201 facing the main body 202 and the side surface of the main body 202 facing the pole ear 201 is in the range of 0 to 30°, and includes the two endpoint values ​​of 0 and 30°, which can further reduce the risk of redundancy or breakage of the pole ear 201, thereby further improving the quality of the battery cell.

[0075] In some optional embodiments, the angle α between the first side wall 231 and the second side wall 232 satisfies: 90°≤α≤95°.

[0076] In some optional embodiments, the angle α between the first side wall 231 and the second side wall 232 satisfies: 92°≤α≤94°.

[0077] By further setting the angle α between the first side wall 231 and the second side wall 232 between 92° and 94°, including the two endpoint values ​​of 92° and 94°, the possibility of redundancy or cracking of the tab 201 can be further reduced, which is beneficial to further improve the quality of the battery cell after core assembly.

[0078] After testing, it was found that when the angle α between the first side wall 231 and the second side wall 232 is in the range of 92° to 94°, and includes the two endpoint values ​​of 92° and 94°, in the battery cell formed by the pole ear 201 after being shaped by the shaping mold 100 under this structure, the angle β between the side surface of the pole ear 201 facing the main body 202 and the side surface of the main body 202 facing the pole ear 201 is in the range of 0 to 5°, and includes the two endpoint values ​​of 0 and 5°, which can further reduce or avoid the risk of redundancy or breakage of the pole ear 201, thereby further improving the quality of the battery cell.

[0079] like Figure 1 and Figure 2 As shown, in some optional embodiments, in the second direction Y, the extension direction of the orthographic projection of the first side wall 231 intersects with the extension direction of the orthographic projection of the first wall 21, and the extension direction of the orthographic projection of the second side wall 232 intersects with the first direction X.

[0080] It can be understood that there is an angle between the extension surface of the first side wall 231 and the extension surface of the first wall 21 , and the second side wall 232 and the second wall 22 are located in the same extension surface.

[0081] By designing the structure of the shaping mold 100 in the above manner, the shaping requirements of the shaping mold 100 for the pole lug 201 can be met, which is beneficial to reduce or avoid redundancy or cracking of the pole lug 201 during the core assembly process, and is beneficial to ensuring the reliability of the pole lug 201, thereby helping to improve the quality of the battery cell.

[0082] Please continue reading Figure 1 and Figure 2 In some optional embodiments, in the second direction Y, the orthographic projection of the first wall 21 extends along the height direction Z of the shaping mold 100, and the height direction Z, the first direction X and the second direction Y intersect each other.

[0083] Because the side surface of the main body 202 facing the pole ear 201 during the shaping process extends along the height direction Z, this arrangement can make the first wall 21 closer to the main body 202 during the shaping process, so that the side wall 23 connected to the first wall 21 can be closer to the root of the pole ear 201 to better shape its root.

[0084] like Figure 1 , Figure 5 and Figure 6 As shown, in some optional embodiments, in the second direction Y, the extension direction of the orthographic projection of the first side wall 231 is parallel to the extension direction of the orthographic projection of the first wall 21, and the extension direction of the second side wall 232 is parallel to the first direction X.

[0085] It can be understood that the first side wall 231 and the first wall 21 are located in the same extension plane, and the second side wall 232 and the second wall 22 are located in the same extension plane.

[0086] By designing the structure of the shaping mold 100 in the above manner, the shaping requirements of the shaping mold 100 for the pole lug 201 can be met, which is beneficial to reduce or avoid redundancy or cracking of the pole lug 201 during the core assembly process, and is beneficial to ensuring the reliability of the pole lug 201, thereby helping to improve the quality of the battery cell.

[0087] Please continue reading Figure 1 , Figure 5 and Figure 6 In some optional embodiments, in the second direction Y, the extension direction of the orthographic projection of the first side wall 231 intersects with the height direction Z of the shaping mold 100, and the height direction Z, the first direction X and the second direction Y intersect with each other.

[0088] This arrangement facilitates the processing and manufacture of the shaping mold 100.

[0089] See also Figure 7 In some optional embodiments, a shaping portion 20 is connected to either side of the mold body 10 along the first direction X, and the shaping portions 20 arranged in pairs are mirror-symmetrical about the center line of the mold body 10 .

[0090] The shaping mold 100 provided in the embodiment of the present application can shape the tabs 201 of two electrode assemblies 200 at the same time, which is beneficial to improving the shaping efficiency.

[0091] The two electrode assemblies 200 may be spaced apart along the first direction X, and the tabs 201 of the two electrode assemblies 200 may be disposed toward each other, and the shaping mold 100 may move along the height direction Z so that the two shaping parts 20 may press against the tabs 201 opposite thereto.

[0092] like Figure 2 , Figure 5 and Figure 7 As shown, in some optional embodiments, at least one of the mold body 10 and the shaping part 20 has a connecting hole 2001 that passes through the height direction Z of the shaping mold 100, and the connecting hole 2001 is configured to provide a channel for the welding ear 201 and the adapter 300, and the height direction Z, the first direction X, and the second direction Y intersect each other.

[0093] Specifically, the connection hole 2001 is configured to provide a channel for welding the tab 201 and the adapter 300 which are sequentially arranged on a side of the connection hole 2001 facing away from the first wall 21 along the height direction Z.

[0094] The shaping mold 100 provided in the embodiment of the present application is used in the welding process of the pole ear 201 and the adapter 300 of the electrode assembly 200. It can be removed after the pole ear 201 is shaped, and then the pole ear 201 and the adapter 300 are welded. Alternatively, the shaping mold 100 can also serve as a fixing and positioning component. It does not need to be removed after the pole ear 201 is shaped. The pole ear 201 and the adapter 300 are directly welded through the connecting hole 2001 using a welding component, which helps to improve the versatility of the shaping mold 100.

[0095] like Figure 5As shown, the pole lug 201 and the adapter 300 of the electrode assembly 200 in the shaping process are stacked along the height direction Z, and the shaping mold 100 is located above the pole lug 201 along the height direction Z. When the shaping mold 100 moves to the corresponding position to press the pole lug 201, a portion of the pole lug 201 and a portion of the adapter 300 are stacked below the connecting hole 2001 along the height direction Z. After the shaping of the pole lug 201 is completed, the pole lug 201 and the adapter 300 can be welded into one by a welding component through the connecting hole 2001.

[0096] In some optional embodiments, the shaping mold 100 includes a cover body, which covers the connection hole 2001. When the shaping mold 100 is shaping the tab 201 without performing a welding operation, the cover body can cover the connection hole 2001 to prevent particles such as foreign impurities from entering the connection hole 2001 and causing contamination of the connection hole 2001 and the tab 201, thereby improving reliability.

[0097] In some optional embodiments, the shaping portion 20 is provided with a connecting hole 2001, or, in some optional embodiments, the connecting hole 2001 includes a first hole provided in the mold body 10 and a second hole provided in the shaping portion 20, and the first hole is connected to the second hole.

[0098] Some welding components have larger structures and require larger connecting holes 2001 to be designed accordingly. Therefore, by setting the connecting holes 2001 on the mold body 10 and the shaping part 20, it can match more types of welding components, which is beneficial to improve the versatility of the shaping mold 100 and save costs.

[0099] The shaping mold 100 provided in the embodiment of the present application can design the shape, size and position of the connecting hole 2001 according to the needs or the size of the welding component, the position of the pole ear 201 and the adapter 300 to be welded, which is conducive to improving the flexibility of use of the shaping mold 100.

[0100] like Figure 5 and Figure 7 As shown, in some optional embodiments, the mold body 10 has a first recess 101 that is recessed inward along a side surface in the height direction Z, the adapter 300 includes an adapter body 301 and a connecting portion 302 connected to the adapter body 301 on either side along the first direction X, the adapter body 301 protrudes from the connecting portion 302 along the height direction Z, and the first recess 101 is configured to accommodate the adapter body 301.

[0101] It can be understood that the tab 201 and the connecting portion 302 of the adapter 300 are welded.

[0102] The first recess 101 is used to accommodate the adapter body 301 , that is, the size of the first recess 101 in the height direction Z is greater than or equal to the size of the adapter body 301 in the height direction Z.

[0103] like Figure 3 As shown, the adapter sheet 300' in the related art is a plate-like or sheet-like structure without a protruding design structure, that is, the shaping mold in the related art does not take into account the structure of the adapter sheet with a protruding design structure. When the pole piece lug 201' is shaped, the bottom surface of the shaping mold in the related art will simultaneously press against the pole piece lug 201' and part of the adapter sheet on one side of the adapter sheet, which can easily cause the adapter sheet with a protruding design structure to deform. Moreover, since the bottom surface of the shaping mold in the related art is not compatible with the shape of the adapter sheet with a protruding design structure, the adapter sheet with a protruding design structure cannot release stress due to heat transfer during the welding process of the pole piece lug 201' and the pole piece body 202', resulting in the adapter sheet with a protruding design structure warping.

[0104] However, the embodiment of the present application is different from this. In the embodiment of the present application, the shaping mold 100 makes the shapes of the mold body 10 and the adapter 300 match during the process of pressing the tab 201, so as to prevent the mold body 10 from overpressing the adapter body 301 of the adapter 300. The protruding adapter body 301 of the adapter 300 can be accommodated in the first recess 101. The first recess 101 can provide good positioning for the adapter 300 and prevent the adapter 300 from being deformed or damaged, which is beneficial to improving the quality of the battery cell after the core is assembled.

[0105] Optionally, the dimensions of the first recess 101 in the height direction Z and in the first direction X can be designed according to the dimensions of the adapter body 301, so that the mold body 10 can just abut against the adapter body 301 or have a certain gap with the adapter body 301 to achieve positioning and release stress.

[0106] See also Figure 8 In some optional embodiments, a dimension H of the first recess 101 in the height direction Z satisfies: 0<H<8mm.

[0107] As an example, H can be, but is not limited to, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, etc.

[0108] It is understandable that if H is set too small, the mold body 10 may over-press the adapter body 301, and if H is set too large, the gap between the mold body 10 and the adapter body 301 in the height direction Z is large, and it is impossible to position and fix them.

[0109] Therefore, by setting the dimension H of the first recess 101 in the height direction Z to be between 0 and 8 mm, the reliability of the adapter 300 can be ensured.

[0110] Optionally, a dimension H of the first recess 101 in the height direction Z satisfies: 1 mm ≤ H ≤ 6 mm.

[0111] Optionally, a dimension H of the first recess 101 in the height direction Z satisfies: 2 mm ≤ H ≤ 5 mm.

[0112] In some optional embodiments, it is characterized in that, 2mm≤H≤4mm.

[0113] By further setting the dimension H of the first recess 101 in the height direction Z between 2 mm and 4 mm, and including two endpoint values ​​of 2 mm and 4 mm, the reliability of the adapter 300 can be further ensured, which is conducive to further improving the quality of the battery cell after the core is assembled.

[0114] Please continue reading Figure 8 In some optional embodiments, the mold body 10 also has a second recess 102 that is recessed from the bottom wall of the first recess 101 toward the first recess 101 , and in the height direction Z, the orthographic projection of the second recess 102 falls into the middle position of the first recess 101 .

[0115] In the above technical solution, the first recess 101 can position and fix the connection position between the adapter body 301 and the connecting part 302, which is helpful to prevent the adapter 300 from warping. The setting of the second recess 102 can prevent part of the adapter body 301 from contacting the mold body 10 to ensure the safety of the adapter body 301.

[0116] For example, an orthogonal test can be performed on the size H of the first concave portion 101 of the shaping mold 100 and the angle α between the first side wall 231 and the second side wall 232 under a test environment, wherein the shaping mold 100 has a fixed downward pressure of 0.5 MPa; the electrode assembly 200 is an electrode assembly of the same batch of normal flow, ensuring the consistency of the electrode assembly materials; the adapter 300 is an adapter 300 of the same batch, ensuring the consistency of the adapter 300 materials. According to different experimental schemes, a total of 100 sets of shaping molds 100 are processed respectively to shape the electrode assembly 200 and the adapter 300.

[0117] The shaped tab 201 and the adapter 300 are ultrasonically welded, and the ultrasonic welding test parameters are fixed, with an amplitude of 35μm, a pressure of 34Psi, and an energy of 320J. The tab cracking of the tab 201 of the electrode assembly 200 after welding is statistically analyzed, with a total sample size of 5000. The electrode assembly 200 after welding is cored, and the battery cell after the top cover is welded is sent to the CT for tab redundancy testing. The test results are as follows:

[0118] It can be seen from the above table that when H is set between 2 mm and 4 mm and includes the two endpoint values ​​of 2 mm and 4 mm, and when α is set between 92° and 94° and includes the two endpoint values ​​of 92° and 94°, the defective rate of the tab 201 is the lowest.

[0119] It is understandable that the above table only lists some experimental data of the dimension H and the angle α. Since the defective rate of the tabs shaped by the shaping molds made with other data is still relatively high, they are not shown in the above table.

[0120] According to some embodiments of the present application, the present application further provides a welding device, comprising the shaping mold 100 provided in any of the above embodiments and a welding mechanism, wherein the welding mechanism is configured to weld the tab 201 and the adapter 300 shaped by the shaping mold 100 .

[0121] Since the pole tab 201 shaped by the shaping mold 100 provided in the embodiment of the present application is not prone to redundancy or breakage, it is beneficial to improve the quality of the pole tab 201 and the adapter 300 welded by the welding device.

[0122] In some embodiments, the welding device may further include a driving mechanism, which is connected to the shaping mold 100 to drive the shaping mold 100 to move along the height direction Z.

[0123] The driving mechanism may be a linear reciprocating motion mechanism, which may include but is not limited to any one of a ball screw type linear module, a synchronous belt type or a linear motor type linear module and a telescopic mechanism.

[0124] According to some embodiments of the present application, the present application also provides a production equipment, including the welding device provided by any of the above embodiments.

[0125] After the electrode assembly 200 and the adapter 300 are welded by the welding device provided in the embodiment of the present application, redundancy or cracking of the pole ear 201 of the electrode assembly 200 can be reduced or avoided. Therefore, during the production process, the production equipment can reduce the need for shutdowns for inspections, which is beneficial to improving the production efficiency and production quality of the production equipment, and is also beneficial to reducing costs.

[0126] Please also read Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 According to some embodiments of the present application, the present application provides a shaping mold 100 , including a mold body 10 and a shaping part 20 .

[0127] A shaping part 20 is connected to either side of the mold body 10 along the first direction X. The shaping parts 20 are arranged in pairs and are mirror-symmetrical with the center line of the mold body 10. The shaping parts 20 are used to press the pole ear 201 to shape the pole ear 201. The shaping parts 20 have a connecting hole 2001 that passes through the height direction Z of the shaping mold 100. The connecting hole 2001 is configured to provide a channel for welding the pole ear 201 and the adapter 300.

[0128] The mold body 10 has a first recess 101 that is recessed inward on one side surface along the height direction Z. The adapter 300 includes an adapter body 301 and a connecting portion 302 connected to the adapter body 301 on either side along the first direction X. The adapter body 301 protrudes from the connecting portion 302 along the height direction Z. The first recess 101 is configured to accommodate the adapter body 301. The dimension H of the first recess 101 in the height direction Z satisfies: 2mm≤H≤4mm.

[0129] The shaping portion 20 has a first wall 21, a second wall 22 and a side wall 23 connected between the first wall 21 and the second wall 22, the second wall 22 is arranged along the first direction X toward the mold body 10, in the height direction Z, the orthographic projection of the first wall 21 and the orthographic projection of the second wall 22 do not overlap, and in the second direction Y, the orthographic projection of the second wall 22 extends along the first direction X, and the extension direction of the orthographic projection of the first wall 21 intersects with the first direction X, wherein the side wall 23 has a convex portion 2301 protruding away from the mold body 10, and the first direction X, the second direction Y and the height direction Z are perpendicular to each other.

[0130] The side wall 23 includes a first side wall 231 and a second side wall 232 that are intersectingly disposed. The connection point of the first side wall 231 and the second side wall 232 is the vertex of the convex portion 2301 . An angle α between the first side wall 231 and the second side wall 232 satisfies: 92°≤α≤94°.

[0131] In the second direction Y, the orthographic projection of the first wall 21 extends along the height direction Z of the shaping mold 100, the extension direction of the orthographic projection of the first side wall 231 intersects with the height direction Z, and the extension direction of the orthographic projection of the second side wall 232 intersects with the first direction X; or, in the second direction Y, the extension direction of the orthographic projection of the first side wall 231 intersects with the height direction Z of the shaping mold 100, the extension direction of the orthographic projection of the first side wall 231 is parallel to the extension direction of the orthographic projection of the first wall 21, and the extension direction of the second side wall 232 is parallel to the first direction X.

[0132] like Figure 4 As shown, according to some embodiments of the present application, the present application also provides a battery cell, including a shell, an electrode assembly 200 and an adapter 300. The electrode assembly 200 is accommodated in the shell, and the electrode assembly 200 includes a main body 202 and a pole ear 201 that are connected to each other. The shape of the pole ear 201 is formed by the shaping mold 100 provided in any of the above embodiments. The adapter 300 is accommodated in the shell, and the adapter 300 is connected to the shell and the pole ear 201. Among them, in the height direction of the shell, the angle β between the side surface of the pole ear 201 facing the main body 202 and the side surface of the main body 202 facing the pole ear 201 satisfies: 0°≤β≤40°.

[0133] The height direction of the shell can be understood as the first direction X in the present application.

[0134] The housing is a component used to form an internal environment of the battery cell. The internal environment formed by the housing can be used to accommodate the electrode assembly 200 and the adapter 300, and can also be used to accommodate electrolyte and other components.

[0135] The housing may include a shell and an end cap 400 connected to each other, for example, Figure 4 As shown, the adapter 300 can be connected to the end cover 400 and the tab 201 .

[0136] The electrode assembly 200 is a component in the battery cell where electrochemical reactions occur. The housing may contain one or more electrode assemblies 200. The electrode assembly 200 is provided with tabs 201, which can lead current from the main body 202. The tabs 201 include positive tabs and negative tabs.

[0137] Optionally, the battery cell may further include an electrode terminal, which is connected to the end cover 400 . The adapter 300 may be electrically connected to the electrode terminal and the tab 201 , and connected to the end cover 400 via the electrode terminal. The adapter 300 may also be electrically connected to the end cover 400 and the tab 201 .

[0138] In the battery cells provided in some embodiments of the present application, the shape of the pole lug 201 in the electrode assembly 200 is shaped by using the shaping mold 100 provided in any of the above embodiments. After the electrode assembly 200 is combined to form a battery cell, the angle β between the side surface of the pole lug 201 facing the main body 202 and the side surface of the main body 202 facing the pole lug 201 has a value range of 0° to 40°, including two endpoint values ​​of 0° to 40°, which is beneficial to reducing the risk of redundancy or breakage of the pole lug 201, thereby helping to improve the quality of the battery cell.

[0139] In some embodiments, 0°≤β≤30°.

[0140] When the pole lug 201 included in the electrode assembly 200 in the battery cell is shaped by the shaping mold 100 in which the value range of the angle α between the first side wall 231 and the second side wall 232 satisfies the two endpoint values ​​of 90° and 98°, when the electrode assembly 200 is combined to form a battery cell, the value range of the angle β between the side surface of the pole lug 201 facing the main body 202 and the side surface of the main body 202 facing the pole lug 201 satisfies the two endpoint values ​​of 0° to 30°, which can further reduce the risk of redundancy or breakage of the pole lug 201, thereby further improving the quality of the battery cell.

[0141] In some embodiments, 0°≤β≤5°.

[0142] When the pole lug 201 included in the electrode assembly 200 in the battery cell is shaped by the shaping mold 100 in which the value range of the angle α between the first side wall 231 and the second side wall 232 satisfies the two endpoint values ​​of 92° to 94°, and 92° and 94°, when the electrode assembly 200 is combined to form a battery cell, the value range of the angle β between the side surface of the pole lug 201 facing the main body 202 and the side surface of the main body 202 facing the pole lug 201 satisfies the two endpoint values ​​of 0° to 5°, which can further reduce or avoid the risk of redundancy or breakage of the pole lug 201, thereby further improving the quality of the battery cell.

[0143] The technical solutions described in the embodiments of the present application are applicable to various battery devices and electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0144] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A shaping die, used in the welding process of the electrode lug and the adapter of the electrode assembly, characterized in that: The shaping mold comprises: Mold body; A shaping portion, wherein the shaping portion is connected to at least one side of the mold body along the first direction, the shaping portion is used to press the pole ear to shape the pole ear, the shaping portion has a first wall, a second wall, and a side wall connected between the first wall and the second wall, the second wall is arranged toward the mold body along the first direction, and in the second direction, the orthographic projection of the second wall extends along the first direction, and the extension direction of the orthographic projection of the first wall intersects with the first direction; Wherein, the side wall has a convex portion protruding away from the mold body, and the first direction intersects with the second direction.

2. The shaping mold according to claim 1, characterized in that: In the height direction of the shaping mold, the orthographic projection of the first wall does not overlap with the orthographic projection of the second wall, and in the first direction, the minimum distance between the vertex of the protrusion and the first wall is less than or equal to the minimum distance between the vertex of the protrusion and the second wall, and the height direction, the first direction and the second direction intersect each other.

3. The shaping mold according to claim 1, characterized in that: The side wall comprises a first side wall and a second side wall which are arranged to intersect each other, the connection point between the first side wall and the second side wall is the vertex of the convex portion, and an angle α between the first side wall and the second side wall satisfies: 90°≤α<180°.

4. The shaping mold according to claim 3, characterized in that: in, 90°≤α≤98°。 5. The shaping mold according to claim 3, characterized in that: in, 92°≤α≤94°。 6. The shaping mold according to claim 3, characterized in that: In the second direction, an extending direction of the orthographic projection of the first side wall intersects with an extending direction of the orthographic projection of the first wall, and an extending direction of the orthographic projection of the second side wall intersects with the first direction.

7. The shaping mold according to claim 6, characterized in that: In the second direction, the orthographic projection of the first wall extends along the height direction of the shaping mold, and the height direction, the first direction and the second direction intersect each other.

8. The shaping mold according to claim 3, characterized in that: In the second direction, an extending direction of the orthographic projection of the first side wall is parallel to an extending direction of the orthographic projection of the first wall, and an extending direction of the second side wall is parallel to the first direction.

9. The shaping mold according to claim 8, characterized in that: In the second direction, the extension direction of the orthographic projection of the first side wall intersects with the height direction of the shaping mold, and the height direction, the first direction and the second direction intersect with each other.

10. The shaping mold according to any one of claims 1 to 9, characterized in that: The shaping parts are connected to either side of the mold body along the first direction, and the shaping parts arranged in pairs are mirror-symmetrical about the center line of the mold body.

11. The shaping mold according to any one of claims 1 to 9, characterized in that: At least one of the mold body and the shaping portion has a connecting hole that passes through the height direction of the shaping mold, and the connecting hole is configured to provide a channel for welding the tab and the adapter, and the height direction, the first direction, and the second direction intersect each other.

12. The shaping mold according to claim 11, characterized in that: The shaping portion is provided with the connecting hole; or, the connecting hole includes a first hole provided in the mold body and a second hole provided in the shaping portion, and the first hole is connected to the second hole.

13. The shaping mold according to claim 12, characterized in that: The mold body has a first recessed portion that is recessed inward on one side surface along the height direction. The adapter includes a transfer body and a connecting portion connected to the transfer body on either side along the first direction. The transfer body protrudes from the connecting portion along the height direction, and the first recessed portion is configured to accommodate the transfer body.

14. The shaping mold according to claim 13, characterized in that: A dimension H of the first recess in the height direction satisfies: 0<H<8 mm.

15. The shaping mold according to claim 14, characterized in that: in, 2mm≤H≤4mm.

16. The shaping mold according to claim 13, characterized in that: The mold body further comprises a second recessed portion which is recessed from the bottom wall of the first recessed portion and faces away from the first recessed portion. In the height direction, the orthographic projection of the second recessed portion falls into the middle position of the first recessed portion.

17. A welding device, characterized in that: include: The shaping mold according to any one of claims 1 to 16; The welding mechanism is configured to weld the tab and the adapter after being shaped by the shaping die.

18. A production equipment, characterized in that: Comprising a welding device according to claim 17.

19. A battery cell, characterized in that: include: shell; An electrode assembly, contained in the housing, the electrode assembly comprising a main body and a tab connected to each other, the tab being shaped by the shaping mold according to any one of claims 1 to 16; A transfer piece, contained in the housing, connected to the housing and the tab; Wherein, in the height direction of the shell, an angle β between a side surface of the pole tab facing the main body and a side surface of the main body facing the pole tab satisfies: 0°≤β≤40°.

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