Shaping mold, Shaping device, Pole piece, Battery cell, Battery device, and Electric device

Abstract

The embodiment of the application provides a shaping mold, a shaping device, a pole piece, a battery monomer, a battery device and an electric equipment. The shaping mold comprises a mold main body and a reinforcing structure. The mold main body has an abutting surface. The reinforcing structure is protruded on the abutting surface and is configured to form a reinforcing indentation on the surface of the pole lug of the pole piece. The reinforcing structure comprises a first reinforcing part and a second reinforcing part. The first reinforcing part is provided with the second reinforcing part on at least one side in a first direction. The first reinforcing part extends in a second direction. The second reinforcing part has an included angle with the first reinforcing part. In the second direction, the first reinforcing part has a first end and a second end which are opposite to each other. In a direction perpendicular to the second direction, the size of the second end is smaller than that of the first end. The first direction intersects with the second direction. The application is beneficial to improving the forming quality of the pole piece.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a shaping mold, shaping device, electrode sheet, battery cell, battery device and electrical equipment. Background Technology

[0002] During the processing of electrode sheets in battery devices, the tabs of the electrode sheets are prone to deformation, folding, or even breakage during die-cutting and other processes. This can easily lead to folding in subsequent processes to overlap with the active material on the electrode sheet, thus affecting the forming quality of the electrode sheet. Utility Model Content

[0003] In view of the above problems, this application provides a forming mold, a forming device, an electrode sheet, a battery cell, a battery device, and an electrical device, which helps to improve the forming quality of the electrode sheet.

[0004] In a first aspect, this application provides a shaping mold, comprising: a mold body having an abutting surface; a reinforcing structure protruding from the abutting surface and configured to form a reinforcing indentation on the surface of the electrode tab of the electrode sheet, the reinforcing structure including a first reinforcing portion and a second reinforcing portion, the second reinforcing portion being disposed on at least one side of the first reinforcing portion along a first direction, the first reinforcing portion extending along a second direction, and the second reinforcing portion having an included angle with the first reinforcing portion; wherein, along the second direction, the first reinforcing portion has a first end and a second end facing opposite directions, and along a direction perpendicular to the second direction, the size of the second end is smaller than the size of the first end, and the first direction intersects the second direction.

[0005] In some embodiments of the first aspect, by providing a reinforcing structure protruding on the abutting surface of the mold body, and the reinforcing structure including a first reinforcing part and a second reinforcing part extending in different directions, the forming mold can form reinforcing indentations extending in different directions on the surface of the electrode tab, and can also make the distribution area of ​​the reinforcing indentations on the electrode tab wider, which is beneficial to improving the structural strength of the electrode tab, so that the electrode tab remains flat during processes such as die cutting or winding, and is not prone to deformation, folding and cracking. Furthermore, the size of the second end of the first reinforcing part is set to be smaller than the size of the first end, so that the first reinforcing part can form a first indentation of gradually changing size on the surface of the electrode tab, so as to better fit the electrode tab, thereby better improving the structural strength of the electrode tab, and thus helping to improve the forming quality of the electrode sheet.

[0006] In some embodiments, the mold body is a roller, the contact surface is the outer peripheral surface of the roller, and the first direction is the circumferential direction of the roller.

[0007] In the above technical solution, by setting the main body of the mold as a roller and using its outer peripheral surface as the contact surface, continuous rolling processing of the forming mold can be realized, which is beneficial to improving production efficiency.

[0008] In some embodiments, along a first direction, the first reinforcing portion has a first surface and a second surface located on opposite sides, with an included angle between the first surface and the second surface; from the first end to the second end, the minimum distance between the first surface and the second surface tends to decrease.

[0009] In the above technical solution, by setting the first reinforcing part to a structure in which the size gradually decreases from the first end to the second end, it is beneficial to reduce the risk of deformation caused by stress concentration when reinforcing indentations are formed on the surface of the electrode tab, thereby helping to ensure the structural stability of the electrode tab and thus improving the forming quality of the electrode sheet.

[0010] In some embodiments, along a direction perpendicular to the second direction, the size of the first end is L1 and the size of the second end is L2, wherein: 1 / 5 ≤ L2 / L1 < 1.

[0011] In the above technical solution, by setting the ratio of L2 / L1 within the above range, it is possible to avoid the size of the first end and the size of the second end being too different, which can not only ensure the structural strength of the electrode but also facilitate the processing and manufacturing of the reinforcing structure.

[0012] In some embodiments, 2 / 5 ≤ L2 / L1 ≤ 2 / 3. This arrangement is more conducive to the fabrication and processing of the reinforcing structure.

[0013] In some embodiments, along the extending direction of the second reinforcing portion, the second reinforcing portion has a third end and a fourth end facing opposite directions, the third end being connected to the first reinforcing portion, and the fourth end being spaced apart from the first reinforcing portion.

[0014] In the above technical solution, the second reinforcing part is connected to the first reinforcing part through the third end, which is conducive to the formation of a support node at the third end of the reinforcing structure, thereby enhancing the deformation resistance of the reinforcing indentation corresponding to this location on the electrode tab. The fourth end of the second reinforcing part is spaced apart from the first reinforcing part, which can effectively avoid stress concentration caused by the reinforcing indentation corresponding to this location on the electrode tab.

[0015] In some embodiments, the fourth end is disposed facing the second end; and / or, the first reinforcing portion is connected to a second reinforcing portion on either side along the first direction, and the third ends of each second reinforcing portion connected to the same first reinforcing portion have staggered orthographic projections in the first direction. By configuring it in the above manner, the overall structural strength of the electrode tab can be better improved.

[0016] In some embodiments, the dimension of the third end is L3 and the dimension of the fourth end is L4 in a direction perpendicular to the extension direction of the second reinforcing part, wherein: 1 / 2≤L4 / L3≤5 / 4.

[0017] In the above technical solution, by setting the ratio of L4 / L3 within the above range, it is possible to avoid the size difference between the first end and the second end being too large, which can ensure the structural strength of the electrode tab and facilitate the processing and manufacturing of the reinforced structure.

[0018] In some embodiments, 3 / 4 ≤ L4 / L3 ≤ 1. This arrangement is more conducive to the fabrication and processing of the reinforcing structure.

[0019] In some embodiments, the connection between the first reinforcing part and the second reinforcing part is an arc-shaped structure.

[0020] The above technical solution can effectively reduce stress concentration at the connection point between the two components, which is beneficial to improving the structural stability of the reinforced structure and thus improving the reliability of the forming mold.

[0021] In some embodiments, a first reinforcing portion is connected to at least one side along a first direction by a plurality of second reinforcing portions. In a second direction, the size of the first reinforcing portion is D1, and the minimum distance between two adjacent second reinforcing portions located on the same side of the first reinforcing portion along the first direction is D2, wherein 3 / 8≤D2 / D1≤2 / 3.

[0022] In the above technical solution, by setting the ratio of D2 / D1 within the above range, it can be ensured that a second reinforcing part with an appropriate spacing is provided on the same side of the first reinforcing part. This is beneficial to ensuring the structural stability of the reinforcing structure and also to improving the reinforcing effect of the reinforcing structure on the strength of the tab structure.

[0023] In some embodiments, 3 / 8 ≤ D2 / D1 ≤ 1 / 2. This configuration helps to further improve the structural stability of the reinforcing structure and enhance its strengthening effect on the tab structure.

[0024] In some embodiments, a plurality of reinforcing structures are provided, and the plurality of reinforcing structures are distributed along a first direction.

[0025] The above technical solution can increase the number of reinforcing indentations formed on the surface of the electrode tab, which is beneficial to improving the structural strength of the electrode tab and thus improving the forming quality of the electrode sheet.

[0026] In some embodiments, along the first direction, the minimum spacing between two adjacent first reinforcing portions is between 6 mm and 12 mm.

[0027] In the above technical solution, by setting the minimum spacing between two adjacent first reinforcing parts along the first direction within the above range, it is possible to ensure that the spacing between the two adjacent first reinforcing parts is moderate, which is beneficial to ensuring the structural stability of the reinforcing structure and also beneficial to improving the reinforcing effect of the reinforcing structure on the strength of the tab structure.

[0028] In some embodiments, the minimum spacing between two adjacent first reinforcing parts along the first direction is between 8 mm and 10 mm. This arrangement helps to further improve the structural stability of the reinforcing structure and enhance its strengthening effect on the tab structure.

[0029] In some embodiments, a second reinforcing portion is connected to a first reinforcing portion on either side of a first direction, and a plurality of second reinforcing portions located between two adjacent first reinforcing portions overlap in orthographic projection in a second direction.

[0030] In the above technical solution, the more compact structural design is beneficial to improving the structural compactness of the forming mold, and it will also make the reinforcing indentation formed on the surface of the electrode tab more compact, so as to better improve the structural strength of the electrode tab, thereby more effectively improving the forming quality of the electrode sheet.

[0031] In some embodiments, a plurality of second reinforcing portions are connected to each side of the first reinforcing portion along the first direction, and the plurality of second reinforcing portions located between two adjacent first reinforcing portions are arranged alternately along the second direction.

[0032] In the above technical solution, the reinforcing structure can form uniform reinforcing indentations on the surface of the electrode tab to better improve the structural strength of the electrode tab, thereby more effectively improving the molding quality within the electrode sheet.

[0033] In some embodiments, the included angle between the first reinforcing part and the second reinforcing part is α, wherein: 30°≤α≤60°.

[0034] In the above technical solution, by setting the included angle α within the above range, the structural compactness of the forming mold can be improved, and it is also beneficial to improve the strengthening effect of the reinforcing structure on the strength of the electrode structure.

[0035] In some embodiments, 40°≤α≤50°. This configuration helps to further improve the structural compactness of the forming mold and enhance the reinforcing effect of the strengthening structure on the electrode tab structure.

[0036] Secondly, this application also provides an electrode shaping apparatus, including a shaping mold provided according to any embodiment of the first aspect.

[0037] Thirdly, this application also provides an electrode sheet, comprising: a main body portion; an electrode tab, wherein at least one side of the main body portion is connected to the electrode tab along the width direction, and at least one side of the electrode tab is formed with a reinforcing indentation along the thickness direction, the reinforcing indentation including a first indentation and a second indentation, wherein at least one side of the first indentation is provided with a second indentation along the length direction of the main body portion, the first indentation extends along a second direction, and the second indentation and the first indentation have an included angle; wherein the first indentation has a first indentation end and a second indentation end facing opposite directions along the second direction, and the size of the second indentation end is smaller than the size of the first indentation end in a direction perpendicular to the second direction, and the second direction intersects with the thickness direction and the length direction.

[0038] In some embodiments of the third aspect, by forming a reinforcing indentation on at least one side of the tab along the thickness direction, and the reinforcing indentation including a first indentation and a second indentation extending in different directions, the distribution area of ​​the reinforcing indentation on the tab is wider, which is beneficial to improving the structural strength of the tab, keeping the tab flat during processes such as cutting or winding, and making it less prone to deformation, folding and cracking. Furthermore, by setting the size of the second indentation end to be smaller than the size of the first indentation end, the deformation resistance of the tab is better improved, thereby improving the forming quality of the electrode sheet.

[0039] In some embodiments, along the second direction, the tab has a root and a free portion facing opposite directions, the root being connected to the main body portion, a first end indentation being disposed towards the root, and a second indentation end being disposed towards the free portion.

[0040] In some embodiments, along the extending direction of the second indentation, the second indentation has a third indentation end and a fourth indentation end facing opposite directions, the third indentation end being connected to the first indentation, and the fourth indentation end being spaced apart from the first indentation.

[0041] In some embodiments, the fourth indentation end is disposed toward the second indentation end; and / or, the first indentation is connected to the second indentation on either side along the length direction, and the third indentation ends of each second indentation connected to the same first indentation have their orthographic projections in the length direction staggered.

[0042] Fourthly, this application also provides a battery cell including an electrode provided according to any embodiment of the third aspect.

[0043] Fifthly, this application also provides a battery device including a plurality of battery cells provided according to any embodiment of the fourth aspect.

[0044] In a sixth aspect, this application also provides an electrical device, including a battery cell provided according to any embodiment of the fourth aspect or a battery device provided according to any embodiment of the fifth aspect, wherein the battery cell or battery device is used to store or provide electrical energy.

[0045] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of the shaping mold provided in some embodiments of this application;

[0048] Figure 2 Schematic diagrams of the structure of the shaping mold provided in other embodiments of this application;

[0049] Figure 3 A partial structural schematic diagram of a shaping mold provided in some embodiments of this application;

[0050] Figure 4 This is a schematic diagram of the structure of the electrode provided in some embodiments of this application;

[0051] Figure 5 for Figure 4 A magnified view of point P in the middle.

[0052] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0053] 1. Shaping mold;

[0054] 10. Mold body; 11. Abutment surface;

[0055] 20. Reinforcing structure; 21. First reinforcing part; 211. First end; 212. Second end; 213. First surface; 214. Second surface; 22. Second reinforcing part; 221. Third end; 222. Fourth end;

[0056] 2. Electrode; 201. Main body; 202. Electrode ear; 2021. Root; 2022. Free part;

[0057] 200. Reinforced indentation; 210. First indentation; 2110. First indentation end; 2120. Second indentation end; 220. Second indentation; 2210. Third indentation end; 2220. Fourth indentation end;

[0058] X, first direction; Y, second direction; A, width direction; B, length direction. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0061] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0064] In the embodiments of this application, the same reference numerals denote 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 this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0065] In this application, "multiple" means two or more (including two).

[0066] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0067] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0068] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0069] During the processing of electrode sheets in battery devices, the tabs of the electrode sheets are prone to deformation, folding, or even breakage during die-cutting and other processes. This can easily lead to folding in subsequent processes to overlap with the active material on the electrode sheet, thus affecting the forming quality of the electrode sheet.

[0070] To address the aforementioned technical problems, this application provides a forming mold, including a mold body and a reinforcing structure. The reinforcing structure protrudes from the abutment surface and is configured to form a reinforcing indentation on the surface of the electrode tab of the electrode sheet. The reinforcing structure includes a first reinforcing portion and a second reinforcing portion. The second reinforcing portion is disposed on at least one side of the first reinforcing portion along a first direction. The first reinforcing portion extends along a second direction, and an angle is formed between the second reinforcing portion and the first reinforcing portion. Along the second direction, the first reinforcing portion has a first end and a second end facing opposite directions. In a direction perpendicular to the second direction, the size of the second end is smaller than the size of the first end. The first direction intersects the second direction.

[0071] By protruding a reinforcing structure on the contact surface of the mold body, and the reinforcing structure including a first reinforcing part and a second reinforcing part extending in different directions, the forming mold can form reinforcing indentations extending in different directions on the surface of the electrode ear, and the distribution area of ​​the reinforcing indentations on the electrode ear can be wider, which is beneficial to improving the structural strength of the electrode ear, so that the electrode ear remains flat during die-cutting or winding processes and is not prone to deformation, folding and cracking. Furthermore, by setting the size of the second end of the first reinforcing part to be smaller than the size of the first end, the first reinforcing part can form a first indentation of gradually changing size on the surface of the electrode ear, so as to better fit the electrode ear, thereby better improving the structural strength of the electrode ear, and thus helping to improve the forming quality of the electrode sheet.

[0072] In the embodiments of this application, the electrode may be, but is not limited to, an anode electrode.

[0073] Please refer to the following: Figures 1 to 5 According to an embodiment of this application, a shaping mold 1 is provided, including a mold body 10 and a reinforcing structure 20. The mold body 10 has an abutment surface 11. The reinforcing structure 20 protrudes from the abutment surface 11 and is configured to form a reinforcing indentation 200 on the surface of the tab 202 of the electrode sheet 2. The reinforcing structure 20 includes a first reinforcing portion 21 and a second reinforcing portion 22. The second reinforcing portion 22 is disposed on at least one side of the first reinforcing portion 21 along a first direction X. The first reinforcing portion 21 extends along a second direction Y, and the second reinforcing portion 22 has an included angle with the first reinforcing portion 21. Along the second direction Y, the first reinforcing portion 21 has a first end 211 and a second end 212 facing opposite directions. In a direction perpendicular to the second direction Y, the size of the second end 212 is smaller than the size of the first end 211. The first direction X intersects the second direction Y.

[0074] The mold body 10 is used to contact the surface of the tab 202 and apply a certain pressure to form a reinforcing indentation 200 on the surface of the tab 202. The contact surface 11 refers to the working surface of the mold body 10 that contacts the surface of the tab 202. The reinforcing structure 20 is provided on the contact surface 11 and protrudes from the contact surface 11 away from the interior of the mold body 10, so that it can press out the reinforcing indentation 200 on the surface of the tab 202.

[0075] The surface of tab 202 refers to the surface of tab 202 on any side along its thickness direction. It should be noted that a reinforcing indentation 200 can be formed on at least one side of tab 202 along its thickness direction using the shaping mold 1 provided in the embodiments of this application.

[0076] The reinforcing structure 20 includes a first reinforcing part 21 and a second reinforcing part 22. The first reinforcing part 21 can form a corresponding first indentation 210 on the surface of the tab 202, and the second reinforcing part 22 can form a corresponding second indentation 220 on the surface of the tab 202. The angle between the second reinforcing part 22 and the first reinforcing part 21 means that the extension direction of the first reinforcing part 21 is different from the extension direction of the second reinforcing part 22. This allows the reinforcing structure 20 to form first indentations 210 and second indentations 220 extending in different directions on the tab 202, thereby providing reinforcement to the tab 202 in different directions. This helps to improve the overall bending strength of the tab 202 and reduces the possibility of deformation, folding, or even breakage of the tab 202 during die-cutting or winding processes.

[0077] like Figure 2 As shown, in some embodiments, the mold body 10 can be a rectangular structure. The first direction X can be understood as the length or width direction of the abutment surface 11. During the specific use of the forming mold 1, the mold body 10 can be located on one side of the tab 202 along its own thickness direction and move along the thickness direction of the tab 202 to press out a reinforcing indentation 200 on the surface of the tab 202. Of course, the mold body 10 can also be a cylindrical structure, a triangular structure, etc. Optionally, the first direction X is perpendicular to the second direction Y. The first direction X can be the length direction of the abutment surface 11, and the second direction Y can be the width direction of the abutment surface 11. Alternatively, the first direction X can be the width direction of the abutment surface 11, and the second direction Y can be the length direction of the abutment surface 11.

[0078] like Figure 1 As shown, in some embodiments, the mold body 10 can also be a roller, which refers to a cylindrical pressure roller structure, and the first direction X can be the circumferential direction of the roller. During the specific use of the forming mold 1, the mold body 10 can be located on one side of the tab 202 along its thickness direction and roll on the surface of the tab 202 with its own axial direction as the axis, so as to roll-press out reinforcing indentations 200 on the surface of the tab 202. Optionally, the second direction Y can intersect with the axial direction of the roller or be parallel to the axial direction of the roller.

[0079] Along a direction perpendicular to the second direction Y, the size of the second end 212 of the first reinforcing part 21 is smaller than the size of the first end 211. By setting the first reinforcing part 21 to a gradient cross-section structure, the path of stress transmission can be optimized to avoid local stress concentration when the reinforcing indentation 200 is formed on the surface of the tab 202 by the forming mold 1.

[0080] It should be noted that, as Figure 4 and Figure 5As shown, the electrode 2 includes a main body 201 and an electrode tab 202. Along the width direction A of the main body 201, at least one side of the main body 201 is connected to the electrode tab 202. The electrode tab 202 has a root portion 2021 and a free portion 2022 facing opposite directions. The root portion 2021 is connected to the main body 201. Optionally, in the specific use of the forming mold 1, the first end 211 of the first reinforcing part 21 can be positioned towards the root portion 2021, and the second end 212 towards the free portion 2022. Alternatively, the first end 211 of the first reinforcing part 21 can be positioned towards the free portion 2022, and the second end 212 towards the root portion 2021.

[0081] Please see Figure 1 and 5 In some optional embodiments, the first end 211 of the first reinforcing portion 21 faces the root 2021 of the tab 202, and the second end 212 faces the free portion 2022 of the tab 202. It is understood that during processes such as die-cutting or winding, the root 2021 of the tab 202 is more prone to deformation or folding than the free portion 2022. By positioning the larger first end 211 towards the root 2021 and the smaller second end 212 towards the free portion 2022, the larger portion of the first indentation 210 formed on the tab 202 faces the root 2021, and the smaller portion faces the free portion 2022. This enhances the structural strength of the tab 202 at the root 2021, thereby improving the overall structural strength of the tab 202.

[0082] The shaping mold 1 provided in some embodiments of this application has a reinforcing structure 20 protruding on the contact surface 11 of the shaping mold 1. The reinforcing structure 20 includes a first reinforcing part 21 and a second reinforcing part 22 extending in different directions. This allows the shaping mold 1 to form reinforcing indentations 200 extending in different directions on the surface of the tab 202. It also allows the reinforcing indentations 200 to be distributed over a wider area on the tab 202, which is beneficial to improving the structural strength of the tab 202. This makes the tab 202 remain flat during die-cutting or winding processes and is less prone to deformation, folding, and cracking. This allows the tab 202 to maintain a good shape in subsequent processing processes and not overlap with the active material of the electrode 2, thereby improving the forming quality of the electrode 2.

[0083] Furthermore, by setting the size of the second end 212 of the first reinforcing part 21 to be smaller than the size of the first end 211, the first reinforcing part 21 can form a first indentation 210 of a gradually changing size on the surface of the tab 202, so as to better adapt to the structure of the tab 202, making it more flexible in use, thereby improving the structural strength of the tab 202, and thus being more conducive to improving the molding quality of the electrode sheet 2.

[0084] Furthermore, if the tab 202 is folded or torn during the processing of the electrode sheet 2, further adjustments are needed to the defective tab 202, which increases the workload of the operators and reduces production efficiency. However, by using the shaping mold 1 to form a reinforcing indentation 200 on the surface of the tab 202, it is beneficial to improve the deformation resistance of the tab 202 and ensure that the tab 202 maintains a good shape, thereby reducing processing costs and improving production efficiency.

[0085] The height at which the first reinforcing part 21 protrudes relative to the abutting surface 11 can be the same as the height at which the second reinforcing part 22 protrudes relative to the abutting surface 11, or they can be different. Optionally, the height at which the first reinforcing part 21 protrudes relative to the abutting surface 11 and the height at which the second reinforcing part 22 protrudes relative to the abutting surface 11 are the same, which facilitates the processing and manufacturing of the reinforcing structure 20.

[0086] In some embodiments, the reinforcing structure 20 and the roller body are integrally formed. By integrally molding the reinforcing structure 20 and the mold body 10, not only is the assembly efficiency between the two improved, but the risk of the reinforcing structure 20 falling off is also reduced. This also helps to improve the connection strength between the reinforcing structure 20 and the mold body 10, thereby improving the structural stability of the forming mold 1.

[0087] In other embodiments, the reinforcing structure 20 may be provided separately from the mold body 10. The reinforcing structure 20 may be directly connected to the mold body 10, or it may be connected to the mold body 10 through other components. Exemplarily, the connection method between the reinforcing structure 20 and the mold body 10 may be, but is not limited to, bolting, riveting, bonding, or snap-fitting.

[0088] Optionally, the number of reinforcing structures 20 can be set to one or more.

[0089] The first reinforcing part 21 is provided with a second reinforcing part 22 on at least one side along the first direction X. Optionally, the second reinforcing part 22 may be connected to the first reinforcing part 21, or the second reinforcing part 22 may be provided at a distance from the first reinforcing part 21.

[0090] The number of second reinforcing parts 22 can be one or more. Optionally, multiple second reinforcing parts 22 can all be disposed on the same side of the first reinforcing part 21 along the first direction X, or second reinforcing parts 22 can be disposed on either side of the first reinforcing part 21 along the first direction X. Optionally, one second reinforcing part 22 can be disposed on either side of the first reinforcing part 21 along the first direction X, or multiple second reinforcing parts 22 can be disposed. Optionally, the extending directions of the second reinforcing parts 22 can be the same or different.

[0091] Optionally, the shape of the second reinforcing part 22 may be, but is not limited to, any of the following forms: straight line, curved line, broken line, and combinations thereof. The shapes of each second reinforcing part 22 may be the same or different.

[0092] Optionally, the first reinforcing part 21 can form a conical structure or a stepped gradient structure in the direction from the first end 211 to the second end 212.

[0093] Please see Figure 1 In some optional embodiments, the mold body 10 is a roller, the contact surface 11 is the outer peripheral surface of the roller, and the first direction X is the circumferential direction of the roller.

[0094] The mold body 10 adopts a roller structure, and its outer peripheral surface serves as the contact surface 11, which can realize continuous rolling processing. This is beneficial to improving the efficiency of the forming mold 1 in forming a reinforcing indentation 200 on the surface of the tab 202, thereby improving production efficiency.

[0095] The reinforcing structure 20 can be radially protruded from the outer circumferential surface of the roller body.

[0096] Optionally, the second direction Y is parallel to the axial direction of the roller body, which facilitates the positioning of the reinforcing structure 20.

[0097] Please see Figure 3 In some alternative embodiments, along the first direction X, the first reinforcing portion 21 has a first surface 213 and a second surface 214 located on opposite sides, with an included angle between the first surface 213 and the second surface 214. From the first end 211 to the second end 212, the minimum distance between the first surface 213 and the second surface 214 tends to decrease.

[0098] The first surface 213 of the first reinforcing part 21 is a plane extending in the same direction, and the second surface 214 of the first reinforcing part 21 is a plane extending in the same direction. From the first end 211 to the second end 212, the minimum distance between the first surface 213 and the second surface 214 gradually decreases.

[0099] In the above technical solution, the first reinforcing part 21 can be set as a conical structure, which is convenient for processing and manufacturing, and can also ensure the uniformity of the first indentation 210 formed by the first reinforcing part 21 on the surface of the electrode tab 202, which is beneficial to avoid scratching the electrode tab 202.

[0100] Please see Figure 3 In some alternative embodiments, along a direction perpendicular to the second direction Y, the size of the first end 211 is L1, and the size of the second end 212 is L2, wherein: 1 / 5 ≤ L2 / L1 < 1.

[0101] L1 can be understood as the width of the first reinforcing part 21 at the first end 211, and L2 can be understood as the width of the first reinforcing part 21 at the second end 212.

[0102] It should be noted that when the mold body 10 is set as a roller, the first direction X is the circumferential direction of the roller, and the second direction Y is parallel to the axial direction of the roller, the dimension of the first end 211 along the first direction X is L1, and the dimension of the second end 212 along the first direction X is L2. When multiple reinforcing structures 20 are provided, the first ends 211 of the multiple reinforcing structures 20 are arranged coaxially with the roller in the annular structure formed by their surroundings, and the second ends 212 of the multiple reinforcing structures 20 are also arranged coaxially with the roller in the annular structure formed by their surroundings.

[0103] As an example, the ratio of L2 / L1 can be, but is not limited to, 1 / 5, 2 / 5, 3 / 5, 4 / 5, etc. If the ratio of L2 / L1 is set too small, that is, less than 1 / 5, the size of the second end 212 will differ too much from the size of the first end 211, making it inconvenient to process and manufacture.

[0104] Therefore, by setting the ratio of L2 / L1 between 1 / 5 and 1, and including 1 / 5 of an endpoint value, it is possible to avoid the size of the first end 211 and the size of the second end 212 being too different, which can ensure the structural strength of the tab 202 and facilitate the processing and manufacturing of the reinforcing structure 20.

[0105] In some alternative embodiments, 2 / 5 ≤ L2 / L1 ≤ 2 / 3.

[0106] By further setting the ratio of L2 / L1 between 2 / 5 and 2 / 3, including the two endpoint values ​​of 2 / 5 and 2 / 3, it is more conducive to the processing and manufacturing of the reinforcing structure 20.

[0107] In some embodiments, 1.5mm ≤ L1 ≤ 2.5mm. Further, 1.8mm ≤ L1 ≤ 2.2mm.

[0108] In some embodiments, 0.5mm ≤ L2 ≤ 1.5mm. Further, 0.8mm ≤ L2 ≤ 1.2mm.

[0109] Please continue reading. Figure 3 In some alternative embodiments, along the extending direction of the second reinforcing portion 22, the second reinforcing portion 22 has a third end 221 and a fourth end 222 facing opposite directions, the third end 221 being connected to the first reinforcing portion 21, and the fourth end 222 being spaced apart from the first reinforcing portion 21.

[0110] The third end 221 of the second reinforcing part 22 is connected to the first reinforcing part 21 to form a support node at the connection point, thereby increasing the resistance to deformation of the reinforcing indentation 200 formed on the surface of the tab 202 at this connection point. The fourth end 222 of the second reinforcing part 22 is spaced apart from the first reinforcing part 21, which can prevent fatigue fracture caused by stress concentration when the reinforcing indentation 200 is formed on the surface of the tab 202.

[0111] The fourth end 222 can be set toward the first end 211, or it can be set toward the second end 212.

[0112] In some alternative embodiments, the fourth end 222 is positioned toward the second end 212.

[0113] This can be understood as the fourth end 222 of any second reinforcing part 22 being closer to the second end 212 than the first end 211.

[0114] As an example, in the specific use of the shaping mold 1, the fourth end 222 can be set toward the second end 212, and the second end 212 can be set toward the free part 2022 of the tab 202.

[0115] By setting it in the above manner, the structural strength of the tab 202 after being rolled by the forming mold 1 can be better improved.

[0116] Please continue reading. Figure 3 In some alternative embodiments, the first reinforcing part 21 is connected to a second reinforcing part 22 on either side of the first direction X, and the third ends 221 of each second reinforcing part 22 connected to the same first reinforcing part 21 have intersecting orthographic projections in the first direction X.

[0117] By setting the second reinforcing part 22 in a staggered layout to disperse the stress transmission path, local deformation or fatigue failure caused by concentrated load is avoided, which helps to ensure the structural stability of the forming mold 1. Furthermore, the reinforcing indentation 200 formed on the surface of the tab 202 by the above structure can also avoid stress concentration on the surface of the tab 202, thereby better improving the structural strength of the tab 202.

[0118] The staggered projection layout can also optimize the space utilization of the components. When there are multiple reinforcing structures 20 and the multiple reinforcing structures 20 are distributed along the first direction X, the above-mentioned arrangement allows two adjacent reinforcing structures 20 to be closer together, and the second reinforcing part 22 located between two adjacent first reinforcing parts 21 will not interfere. This allows more reinforcing structures 20 to be arranged on the contact surface 11, thereby forming more reinforcing indentations 200 on the surface of the tab 202 to better improve the structural strength of the tab 202.

[0119] Optionally, a second reinforcing part 22 may be connected to either side of the first reinforcing part 21 along the first direction X, or multiple second reinforcing parts 22 may be connected. Optionally, the number of second reinforcing parts 22 connected to both sides of the first reinforcing part 21 along the first direction X may be the same or different. Optionally, the shapes of the second reinforcing parts 22 connected to both sides of the first reinforcing part 21 along the first direction X may be the same or different.

[0120] In some embodiments, the first reinforcing portion 21 is connected to a plurality of second reinforcing portions 22 on either side of the first direction X. With this structure, a plurality of second indentations 220 can be formed on the surface of the tab 202 to better improve the strength of the tab 202.

[0121] like Figures 1 to 3 As shown, for example, the number of second reinforcing parts 22 is set to four, and the first reinforcing part 21 is connected to two second reinforcing parts 22 that are spaced apart along the second direction Y on either side of the first direction X.

[0122] By adopting the above-described configuration, the structural strength of the tab 202 can be ensured while reducing the complexity of the manufacturing process for the reinforcing structure 20, lowering costs, and facilitating processing. It should be noted that the number of second reinforcing parts 22 can be designed according to the dimensions of the tab 202.

[0123] Please see Figure 3 In some alternative embodiments, the third end 221 has a dimension of L3 and the fourth end 222 has a dimension of L4 in a direction perpendicular to the extension direction of the second reinforcing part 22, wherein: 1 / 2≤L4 / L3≤5 / 4.

[0124] L3 can be understood as the width of the second reinforcing part 22 at the third end 221, and L2 can be understood as the width of the second reinforcing part 22 at the fourth end 222.

[0125] As an example, the ratio of L4 / L3 can be, but is not limited to, 1 / 2, 3 / 4, 1, 5 / 4, etc. Setting the ratio of L4 / L3 too small or too large will cause the size of the fourth end 222 to differ too much from the size of the third end 221, making it inconvenient to process and manufacture.

[0126] Therefore, by setting the ratio of L4 / L3 between 1 / 2 and 5 / 4, including the two endpoint values ​​of 1 / 2 and 5 / 4, it is possible to avoid the size difference between the third end 221 and the fourth end 222 being too large, which can ensure the structural strength of the tab 202 and facilitate the processing and manufacturing of the reinforcing structure 20.

[0127] In some alternative embodiments, 3 / 4 ≤ L4 / L3 ≤ 1.

[0128] By further setting the ratio of L4 / L3 between 3 / 4 and 1, including the two endpoint values ​​of 3 / 4 and 1, it is more conducive to the processing and manufacturing of the reinforcing structure 20.

[0129] In some embodiments, 0.8mm ≤ L3 ≤ 1.2mm. Further, 0.8mm ≤ L3 ≤ 1mm.

[0130] In some embodiments, 0.6mm ≤ L4 ≤ 1mm. Further, 0.7mm ≤ L4 ≤ 1mm.

[0131] In some alternative embodiments, the connection between the first reinforcing part 21 and the second reinforcing part 22 is an arc-shaped structure.

[0132] This can be understood as setting the connection between the first reinforcing part 21 and the second reinforcing part 22 as a rounded corner. By setting it in this way, the stress concentration at the connection position between the two can be effectively reduced, which is conducive to improving the structural stability of the reinforcing structure 20, thereby improving the reliability of the forming mold 1.

[0133] Please see Figure 3 In some optional embodiments, the first reinforcing part 21 is connected to at least one side along the first direction X with a plurality of second reinforcing parts 22. In the second direction Y, the size of the first reinforcing part 21 is D1. The minimum distance between two adjacent second reinforcing parts 22 located on the same side of the first reinforcing part 21 along the first direction X is D2, wherein 3 / 8≤D2 / D1≤2 / 3.

[0134] D1 refers to the dimension of the first reinforcing part 21 in the second direction Y, and D2 refers to the minimum spacing between two adjacent second reinforcing parts 22 located on the same side of the first reinforcing part 21 in the second direction Y.

[0135] As an example, the ratio of D2 / D1 can be, but is not limited to, 3 / 8, 5 / 12, 11 / 24, 1 / 2, 2 / 3, etc.

[0136] If the ratio of D2 / D1 is set too small, i.e. less than 3 / 8, the multiple second reinforcing parts 22 connected to the first reinforcing part 21 on the same side along the first direction X will be too close together, making them difficult to process and prone to stress concentration. If the ratio of D2 / D1 is set too large, i.e. greater than 2 / 3, the multiple second reinforcing parts 22 connected to the first reinforcing part 21 on the same side along the first direction X will be too far apart, which will cause the multiple second indentations 220 formed on the surface of the tab 202 to be too far apart, reducing the reinforcing effect of the reinforcing structure 20 on the strength of the tab 202.

[0137] Therefore, by setting the ratio of D2 / D1 between 3 / 8 and 2 / 3, including the two endpoint values ​​of 3 / 8 and 2 / 3, it is possible to ensure that a second reinforcing part 22 with appropriate spacing is provided on the same side of the first reinforcing part 21. This is beneficial to ensuring the structural stability of the reinforcing structure 20 and also to improving the reinforcing effect of the reinforcing structure 20 on the structural strength of the tab 202.

[0138] In some alternative embodiments, 3 / 8 ≤ D2 / D1 ≤ 1 / 2. This arrangement helps to further improve the structural stability of the reinforcing structure 20 and enhance its strengthening effect on the structural strength of the tab 202.

[0139] In some embodiments, 30mm ≤ D1 ≤ 40mm. Further, 36mm ≤ D1 ≤ 40mm.

[0140] In some embodiments, 15mm ≤ D2 ≤ 20mm. Further, 15mm ≤ D2 ≤ 18mm.

[0141] Please see Figure 1 and Figure 2 In some alternative embodiments, the reinforcing structure 20 is configured as a plurality of reinforcing structures 20 distributed along the first direction X.

[0142] By setting it in the above manner, the number of reinforcing indentations 200 formed by the reinforcing structure 20 on the surface of the tab 202 can be increased, which is beneficial to improving the structural strength of the tab 202, thereby improving the molding quality of the electrode sheet 2.

[0143] Multiple reinforcing structures 20 can be spaced out along the first direction X, or they can be connected to each other.

[0144] For example, multiple reinforcing structures 20 are distributed at intervals along the first direction X. Specifically, the first reinforcing portions 21 in two adjacent reinforcing structures 20 are distributed at intervals, and the first reinforcing portions 21 in two adjacent reinforcing structures 20 are also distributed at intervals.

[0145] In some alternative embodiments, the minimum spacing between two adjacent first reinforcing parts 21 along the first direction X is between 6 mm and 12 mm.

[0146] As an example, the minimum spacing between two adjacent first reinforcing parts 21 can be, but is not limited to, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, etc.

[0147] If this minimum spacing is set too small, i.e. less than 6mm, the two adjacent first reinforcing parts 21 will be too close together, making them difficult to process and prone to stress concentration. If this minimum spacing is set too large, i.e. greater than 12mm, the two adjacent first reinforcing parts 21 will be too far apart, which will cause the multiple first indentations 210 formed on the surface of the tab 202 to be too far apart, thereby reducing the reinforcing effect of the reinforcing structure 20 on the strength of the tab 202.

[0148] Therefore, by setting the minimum spacing between two adjacent first reinforcing parts 21 along the first direction X between 6mm and 12mm, including the two endpoint values ​​of 6mm and 12mm, it is possible to ensure that the spacing between the two adjacent first reinforcing parts 21 is moderate, which is beneficial to ensuring the structural stability of the reinforcing structure 20 and also beneficial to improving the reinforcing effect of the reinforcing structure 20 on the structural strength of the tab 202.

[0149] In some alternative embodiments, the minimum spacing between two adjacent first reinforcing portions 21 along the first direction X is between 8 mm and 10 mm.

[0150] This configuration helps to further improve the structural stability of the reinforcing structure 20 and enhance its effect on strengthening the structure of the tab 202.

[0151] Please see Figure 3 In some alternative embodiments, the first reinforcing part 21 is connected to a second reinforcing part 22 on either side of the first direction X, and the plurality of second reinforcing parts 22 located between two adjacent first reinforcing parts 21 have their orthographic projections interlaced in the second direction Y.

[0152] This can be understood as a plurality of second reinforcing parts 22 located between two adjacent first reinforcing parts 21, a portion of the plurality of second reinforcing parts 22 being connected to one of the first reinforcing parts 21, another portion of the plurality of second reinforcing parts 22 being connected to another of the first reinforcing parts 21, and the orthogonal projections of the plurality of second reinforcing parts 22 in the second direction Y having overlapping portions.

[0153] By setting it in the above manner, the second reinforcing part 22 located between two adjacent first reinforcing parts 21 can be set closer together, making the reinforcing structure 20 more compact. This is beneficial to improving the structural compactness of the forming mold 1 and also makes the reinforcing indentation 200 formed on the surface of the tab 202 more compact, so as to better improve the structural strength of the tab 202 and thus more effectively improve the forming quality of the electrode sheet 2.

[0154] Optionally, a portion of a plurality of second reinforcing portions 22 located between two adjacent first reinforcing portions 21 have their orthographic projections interleaved in the second direction Y.

[0155] In some alternative embodiments, a plurality of second reinforcing parts 22 are connected to each side of the first reinforcing part 21 along the first direction X, and the plurality of second reinforcing parts 22 located between two adjacent first reinforcing parts 21 are arranged alternately along the second direction Y.

[0156] Alternating arrangement means, for example, having four second reinforcing parts 22 between two adjacent first reinforcing parts 21, with the first and third second reinforcing parts 22 connected to the same first reinforcing part 21, and the second and fourth second reinforcing parts 22 connected to another first reinforcing part 21.

[0157] By setting it in the above manner, the reinforcing structure 20 can form a uniform reinforcing indentation 200 on the surface of the tab 202, so as to better improve the structural strength of the tab 202 and thus more effectively improve the molding quality of the electrode sheet 2.

[0158] Please continue reading. Figure 3 In some optional embodiments, the included angle between the first reinforcing part 21 and the second reinforcing part 22 is α, wherein: 30°≤α≤60°.

[0159] As an example, the included angle α can be, but is not limited to, 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc.

[0160] If the included angle α is set too small, i.e. less than 30°, the first reinforcing part 21 and the second reinforcing part 22 will be too close together, which is not conducive to forming a first indentation 210 and a second indentation 220 with clear boundaries on the surface of the tab 202. If the included angle α is set too large, i.e. greater than 60°, the reinforcing structure 20 will occupy a large space overall, and may also reduce the reinforcing effect of the reinforcing structure 20 on the strength of the tab 202.

[0161] Therefore, by using an included angle α between 30° and 60°, including the two endpoint values ​​of 30° and 60°, the structural compactness of the forming mold 1 can be improved, and it is also beneficial to improve the strengthening effect of the reinforcing structure 20 on the structural strength of the tab 202.

[0162] In some alternative embodiments, 40°≤α≤50°.

[0163] This design helps to further improve the structural compactness of the forming mold 1 and further enhance the strengthening effect of the reinforcing structure 20 on the structural strength of the tab 202.

[0164] According to some embodiments of this application, this application also provides a shaping device for an electrode 2, including the shaping mold 1 provided in any of the above embodiments.

[0165] Please see Figure 4 and Figure 5 According to some embodiments of this application, this application also provides an electrode 2, including a main body 201 and an electrode tab 202. Along the width direction A of the main body 201, at least one side of the main body 201 is connected to the electrode tab 202. Along the thickness direction of the electrode tab 202, at least one side of the electrode tab 202 has a reinforcing indentation 200, which includes a first indentation 210 and a second indentation 220. Along the length direction B of the main body 201, at least one side of the first indentation 210 has the second indentation 220. The first indentation 210 extends along a second direction Y, and the second indentation 220 forms an angle with the first indentation 210. The first indentation 210 has a first indentation end 2110 and a second indentation end 2120 facing opposite directions along the second direction Y. Along a direction perpendicular to the second direction Y, the size of the second indentation end 2120 is smaller than the size of the first indentation end 2110. The second direction Y intersects the thickness direction and the length direction B.

[0166] The electrode sheet 2 provided in some embodiments of this application has a reinforcing indentation 200 formed on at least one side of the electrode tab 202 along its own thickness direction. The reinforcing indentation 200 includes a first indentation 210 and a second indentation 220 extending in different directions. This makes the reinforcing indentation 200 distributed over a wider area on the electrode tab 202, which is beneficial to improving the structural strength of the electrode tab 202. This allows the electrode tab 202 to remain flat during processes such as cutting or winding, and is less prone to deformation, folding, and cracking, thereby improving the forming quality of the electrode sheet 2.

[0167] Furthermore, by setting the size of the second indentation end 2120 of the first indentation 210 to be smaller than the size of the first indentation end 2110, the surface of the tab 202 can form a first indentation 210 with a gradient size, so as to better fit the structure of the tab 202, thereby improving the structural strength of the tab 202 and further improving the molding quality of the electrode sheet 2.

[0168] Furthermore, if the tab 202 is folded or torn during the processing of electrode 2, further adjustments are needed to the defective tab 202, which increases the workload of the operators and reduces production efficiency. However, by forming a reinforcing indentation 200 on the surface of the tab 202, it is beneficial to improve the deformation resistance of the tab 202 and ensure that the tab 202 maintains a good shape, thereby reducing processing costs and improving the production efficiency of electrode 2.

[0169] It should be noted that during the processing of the electrode sheet 2, a reinforcing indentation 200 can be formed on the surface of the electrode tab 202 using the shaping mold 1 provided in any of the above embodiments. Specifically, the first reinforcing part 21 in the reinforcing structure 20 can form a corresponding first indentation 210 on the surface of the electrode tab 202, and the shape of the first indentation 210 matches the shape of the first reinforcing part 21. Similarly, the second reinforcing part 22 in the reinforcing structure 20 can form a corresponding second indentation 220 on the surface of the electrode tab 202, and the shape of the second indentation 220 matches the shape of the second reinforcing part 22. The length direction B of the main body 201 can be the same as the first direction X, and the width direction A of the main body 201 can be the same as the second direction Y.

[0170] Alternatively, the reinforcing indentation 200 on the tab 202 can also be formed using other processing molds that correspond to its shape.

[0171] Optionally, a tab 202 may be connected to one side of the main body 201 along the width direction A, or tabs 202 may be connected to both sides of the main body 201 along the width direction A.

[0172] Optionally, a reinforcing indentation 200 may be formed on one side of the tab 202 along its own thickness direction, or the reinforcing indentation 200 may be formed on both sides of the tab 202 along its own thickness direction.

[0173] like Figure 5 As shown, in some alternative embodiments, along the second direction Y, the tab 202 has a root portion 2021 and a free portion 2022 facing opposite directions. The root portion 2021 is connected to the main body portion 201. The first indentation end 2110 is disposed toward the root portion 2021, and the second indentation end 2120 is disposed toward the free portion 2022.

[0174] It is understandable that during processes such as die-cutting or winding, the root 2021 of the electrode tab 202 is more prone to deformation or folding than the free portion 2022. By setting the larger first indentation end 2110 toward the root 2021 and the smaller second indentation end 2120 toward the free portion 2022, the larger portion of the first indentation 210 formed on the electrode tab 202 is positioned toward the root 2021, and the smaller portion is positioned toward the free portion 2022. This helps to enhance the structural strength of the electrode tab 202 at the root 2021, thereby improving the overall structural strength of the electrode tab 202.

[0175] Furthermore, when forming a reinforcing indentation 200 on the surface of the tab 202, since the root 2021 of the tab 202 is connected to the main body 201, the root 2021 is subject to the tensile force of the main body 201 and is not easily deformed, while the free part 2022 is easily deformed during the forming of the reinforcing indentation 200. Therefore, by setting the smaller second indentation end 2120 toward the free part 2022, the force on the free part 2022 can be reduced, which is beneficial to improving the structural stability of the tab 202 after forming the reinforcing indentation 200.

[0176] In some alternative embodiments, along the extending direction of the second indentation 220, the second indentation 220 has a third indentation end 2210 and a fourth indentation end 2220 facing opposite directions, the third indentation end 2210 being connected to the first indentation 210, and the fourth indentation end 2220 being spaced apart from the first indentation 210.

[0177] By setting it in the above manner, the reinforcing indentation 200 can be set in a shape similar to a tree branch and a leaf, with one end of the leaf connected to the tree branch and the other end suspended in the air. This structure has strong structural stability. Therefore, by setting the reinforcing indentation 200 in the above structure, it is beneficial to better enhance the reinforcing effect of the reinforcing indentation 200 on the structural strength of the tab 202. Among them, the first indentation 210 is equivalent to a tree branch and the second indentation 220 is equivalent to a leaf.

[0178] In some alternative embodiments, the fourth indentation end 2220 is positioned toward the second indentation end 2120.

[0179] By setting it in the above manner, the structural strength of the tab 202 can be improved, thereby improving the molding quality of the electrode 2.

[0180] In some alternative embodiments, the first indentation 210 is connected to a second indentation 220 on either side of the length direction B, and the third indentation ends 2210 of each second indentation 220 connected to the same first indentation 210 have intersecting orthographic projections in the length direction B.

[0181] By setting the second indentation 220 in a staggered layout to disperse the stress transmission path, local deformation or fatigue failure caused by concentrated loads can be avoided, and stress concentration on the surface of the tab 202 can be avoided, so as to better improve the structural strength of the tab 202.

[0182] The staggered projection layout can also optimize the space utilization of the component. When there are multiple reinforcing indentations 200 and multiple reinforcing indentations 200 are distributed along the length direction B, the above-mentioned arrangement allows two adjacent reinforcing indentations 200 to be closer together, and the second indentation 220 located between two adjacent first indentations 210 will not interfere with each other, so that more reinforcing indentations 200 are formed on the surface of the tab 202, thereby better improving the structural strength of the tab 202.

[0183] It is understood that the reinforcing indentation 200 located at the tab 202 in the electrode sheet 2 provided in some embodiments of this application has the same technical features as the shaping mold 1 provided in any of the above embodiments. For example, their size features, shape features and distribution features are the same. Therefore, this application will not repeat them here.

[0184] According to some embodiments of this application, this application also provides a battery cell including the electrode 2 provided in any of the above embodiments.

[0185] Because the electrode 2 provided in some embodiments of this application has good molding quality, it is beneficial to improve the quality of the battery cell including this electrode 2.

[0186] According to some embodiments of this application, this application also provides a battery device, including the battery cell provided in any of the above embodiments.

[0187] Because the battery cells provided in some embodiments of this application have good quality, it is beneficial to improve the reliability and service life of battery devices including these battery cells.

[0188] According to some embodiments of this application, this application also provides an electrical device, including a battery cell or a battery device provided in any of the above embodiments, wherein the battery cell or battery device is used to store or provide electrical energy.

[0189] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0190] Please refer to the following: Figure 1 , Figure 3 , Figure 4 and Figure 5 According to some embodiments of this application, this application provides a shaping mold 1, which includes a mold body 10 and a reinforcing structure 20.

[0191] The mold body 10 has an abutment surface 11, wherein the mold body 10 is a roller, the abutment surface 11 is the outer peripheral surface of the roller, and the circumferential direction of the roller is the first direction X.

[0192] Multiple reinforcing structures 20 are provided, each protruding from the contact surface 11 and spaced apart along the first direction X. The reinforcing structures 20 are configured to form reinforcing indentations 200 on the surface of the tabs 202 of the electrode sheet 2. Each reinforcing structure 20 includes a first reinforcing portion 21 and a second reinforcing portion 22. The first reinforcing portion 21 extends along the second direction Y and has a first end 211 and a second end 212 facing opposite directions. The second direction Y is parallel to the axial direction of the roller body. Along the first direction X, the dimension of the first end 211 is L1, and the dimension of the second end 212 is L2, where 1 / 5 ≤ L2 / L1 < 1. Along the first direction X, the first reinforcing portion 21 has a first surface 213 and a second surface 214 located on opposite sides, with an included angle between the first surface 213 and the second surface 214. From the first end 211 to the second end 212, the minimum distance between the first surface 213 and the second surface 214 decreases. Along the first direction X, the minimum distance between two adjacent first reinforcing portions 21 satisfies a range of 6 mm to 12 mm.

[0193] Each first reinforcing part 21 is connected to a plurality of second reinforcing parts 22 on both sides along the first direction X. The second reinforcing parts 22 and the first reinforcing parts 21 have an included angle α, where 30° ≤ α ≤ 60°. Along the extending direction of the second reinforcing part 22, the second reinforcing part 22 has a third end 221 and a fourth end 222 facing opposite directions. The third end 221 is connected to the first reinforcing part 21, and the fourth end 222 is spaced apart from the first reinforcing part 21 and faces the second end 212. In a direction perpendicular to the extending direction of the second reinforcing part 22, the dimension of the third end 221 is L3, and the dimension of the fourth end 222 is L4, where 1 / 2 ≤ L4 / L3 ≤ 5 / 4.

[0194] The third ends 221 of each of the second reinforcing parts 22 connected to the same first reinforcing part 21 have staggered orthographic projections in the first direction X. Multiple second reinforcing parts 22 located between two adjacent first reinforcing parts 21 are arranged alternately along the second direction Y. In the second direction Y, the size of the first reinforcing part 21 is D1, and the minimum spacing between two adjacent second reinforcing parts 22 located on the same side of the first reinforcing part 21 along the first direction X is D2, where 3 / 8 ≤ D2 / D1 ≤ 2 / 3.

[0195] Please refer to the following: Figure 4 and Figure 5 According to some embodiments of this application, this application provides an electrode 2, including a main body 201 and an electrode tab 202.

[0196] Along the width direction A of the main body 201, at least one side of the main body 201 is connected to a tab 202. Along the thickness direction of the tab 202, a reinforcing indentation 200 is formed on one side of the tab 202. The reinforcing indentation 200 includes a first indentation 210 and a second indentation 220. Along the length direction B of the main body 201, a plurality of second indentations 220 are respectively provided on both sides of the first indentation 210. The first indentation 210 extends along the width direction A, and there is an angle between the second indentation 220 and the first indentation 210.

[0197] The first indentation 210 has a first indentation end 2110 and a second indentation end 2120 facing opposite directions along the width direction A. Along the length direction B, the size of the second indentation end 2120 is smaller than the size of the first indentation end 2110. Along the width direction A, the tab 202 has a root portion 2021 and a free portion 2022 facing opposite directions. The root portion 2021 is connected to the main body portion 201. The first indentation end 2110 is positioned towards the root portion 2021, and the second indentation end 2120 is positioned towards the free portion 2022. Along the extending direction of the second indentation 220, the second indentation 220 has a third indentation end 2210 and a fourth indentation end 2220 facing opposite directions. The third indentation end 2210 is connected to the first indentation 210, and the fourth indentation end 2220 is spaced apart from the first indentation 210 and positioned towards the second indentation end 2120. The third indentation ends 2210 of each second indentation 220 connected to the same first indentation 210 have intersecting orthographic projections in the length direction B.

[0198] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0199] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions 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 this application.

Claims

1. A plastic mold characterized by, include: The mold body has a contact surface; A reinforcing structure protrudes from the contact surface and is configured to form a reinforcing indentation on the surface of the electrode tab of the electrode sheet. The reinforcing structure includes a first reinforcing portion and a second reinforcing portion. The second reinforcing portion is disposed on at least one side of the first reinforcing portion along a first direction. The first reinforcing portion extends along a second direction, and there is an angle between the second reinforcing portion and the first reinforcing portion. Wherein, along the second direction, the first reinforcing portion has a first end and a second end facing opposite directions, along a direction perpendicular to the second direction, the size of the second end is smaller than the size of the first end, and the first direction intersects the second direction.

2. The trim mold of claim 1, wherein The main body of the mold is a roller, the contact surface is the outer peripheral surface of the roller, and the first direction is the circumferential direction of the roller.

3. The trim mold of claim 1, wherein Along the first direction, the first reinforcing part has a first surface and a second surface located on opposite sides, and there is an included angle between the first surface and the second surface; From the first end to the second end, the minimum distance between the first surface and the second surface decreases.

4. A trim die according to any one of claims 1 to 3, wherein Along a direction perpendicular to the second direction, the dimension of the first end is L1, and the dimension of the second end is L2, where: 1 / 5 ≤ L2 / L1 < 1.

5. The trim mold of claim 4, wherein 2 / 5≤L2 / L1≤2 / 3.

6. A trim mold according to any one of claims 1 to 3, characterized in that Along the extending direction of the second reinforcing portion, the second reinforcing portion has a third end and a fourth end facing opposite directions, the third end being connected to the first reinforcing portion, and the fourth end being spaced apart from the first reinforcing portion.

7. The trim mold of claim 6, wherein The fourth end is positioned facing the second end; And / or, the first reinforcing portion is connected to the second reinforcing portion on either side of the first direction, and the third ends of the second reinforcing portions connected to the same first reinforcing portion have intersecting orthographic projections in the first direction.

8. The trim mold of claim 7, wherein Along a direction perpendicular to the extending direction of the second reinforcing part, the dimension of the third end is L3, and the dimension of the fourth end is L4, wherein: 1 / 2≤L4 / L3≤5 / 4.

9. The trim mold of claim 8, wherein 3 / 4≤L4 / L3≤1.

10. The trim mold of claim 6, wherein The connection between the first reinforcing part and the second reinforcing part is an arc-shaped structure.

11. A trim mold according to any one of claims 1 to 3, characterized in that The first reinforcing part is connected to at least one side along the first direction by a plurality of second reinforcing parts. In the second direction, the size of the first reinforcing part is D1. The minimum distance between two adjacent second reinforcing parts located on the same side of the first reinforcing part along the first direction is D2, wherein 3 / 8≤D2 / D1≤2 / 3.

12. The trim mold of claim 11, wherein 3 / 8≤D2 / D1≤1 / 2.

13. The trim mold according to any one of claims 1 to 3, characterized in that The reinforcing structure is configured as a plurality of structures, which are distributed along the first direction.

14. The trim mold of claim 13, wherein Along the first direction, the minimum spacing between two adjacent first reinforcing parts is between 6 mm and 12 mm.

15. The trim mold of claim 14, wherein Along the first direction, the minimum spacing between two adjacent first reinforcing parts is between 8 mm and 10 mm.

16. The trim mold of claim 13, wherein The first reinforcing part is connected to the second reinforcing part on either side of the first direction, and the multiple second reinforcing parts located between two adjacent first reinforcing parts have overlapping orthographic projections in the second direction.

17. The trim mold of claim 13, wherein The first reinforcing part is connected to a plurality of second reinforcing parts on either side of the first direction, and the plurality of second reinforcing parts located between two adjacent first reinforcing parts are arranged alternately along the second direction.

18. The trim mold according to any one of claims 1 to 3, characterized in that The included angle between the first reinforcing part and the second reinforcing part is α, where: 30°≤α≤60°.

19. The shaping mold according to claim 18, characterized in that, 40°≤α≤50°。 20. A shaping device for electrode sheets, characterized in that, Including the shaping mold according to any one of claims 1 to 19.

21. An electrode sheet, characterized in that, include: Main body; The electrode tab is connected to at least one side of the main body along the width direction of the main body. A reinforcing indentation is formed on at least one side of the electrode tab along the thickness direction of the electrode tab. The reinforcing indentation includes a first indentation and a second indentation. The second indentation is provided on at least one side of the first indentation along the length direction of the main body. The first indentation extends along a second direction, and there is an angle between the second indentation and the first indentation. The first indentation has a first indentation end and a second indentation end facing opposite directions along the second direction. The second indentation end is smaller than the first indentation end in a direction perpendicular to the second direction. The second direction intersects the thickness direction and the length direction.

22. The electrode according to claim 21, characterized in that, Along the second direction, the tab has a root portion and a free portion facing opposite directions, the root portion being connected to the main body portion, the first indented end being disposed towards the root portion, and the second indented end being disposed towards the free portion.

23. The electrode sheet according to claim 21, characterized in that, Along the extension direction of the second indentation, the second indentation has a third indentation end and a fourth indentation end facing opposite directions, the third indentation end being connected to the first indentation, and the fourth indentation end being spaced apart from the first indentation.

24. The electrode sheet according to claim 23, characterized in that, The fourth indentation end is positioned toward the second indentation end; And / or, the first indentation is connected to the second indentation on either side of the length direction, and the third indentation ends of each of the second indentations connected to the same first indentation are staggered in orthographic projection along the length direction.

25. A single battery cell, characterized in that, Including the electrode sheet according to any one of claims 21 to 24.

26. A battery device, characterized in that, It includes multiple battery cells as described in claim 25.

27. An electrical appliance, characterized in that, Includes a battery cell according to claim 25 or a battery device according to claim 26, wherein the battery cell or the battery device is used to store or provide electrical energy.

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