Tensioning device and tensioning method for pole piece leftover materials and pole piece cutting equipment

Abstract

The invention provides a pole piece leftover material tensioning device and method and pole piece cutting equipment. The tensioning device for the pole piece leftover materials comprises a first tensioning assembly, a second tensioning assembly and a third tensioning assembly, wherein the first tensioning assembly is used for tensioning the pole piece leftover materials moving in the first direction; the reversing structure is arranged on the downstream of the first tensioning assembly in the first direction and located on the first side of the pole piece material area, the reversing structure is used for converting the moving direction of the leftover materials into a second direction, and the second direction intersects with the first direction; the second tensioning assembly is arranged on the downstream of the reversing structure in the first direction and located on the second side of the pole piece material area, and the second tensioning assembly is used for tensioning the leftover materials and driving the leftover materials to move in the direction away from the pole piece material area. By arranging the first tensioning assembly, the reversing structure and the second tensioning assembly, two-time tensioning of leftover materials can be achieved, the leftover materials are kept in the tensioning state, and therefore the cutting quality can be improved, and the cutting effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a tensioning device and a tensioning method for pole piece scraps, and pole piece cutting equipment. Background Art

[0002] The laser will generate a large amount of dust when cutting the pole piece. If the dust is not well controlled, it will cause the subsequent lithium battery to have a high short circuit rate, large self-discharge, and a greater safety risk in the module.

[0003] Cutting waste needs to be kept in a tensioned state to ensure stable cutting quality. The existing technology uses brushes to clamp the scraps, pull the scraps to keep them tensioned, and collect them into a waste bin. The brushes will cause unstable tension of the scraps due to wear and other problems. At the same time, the brushes are prone to accumulate dust and easily pollute the internal space and workshop.

[0004] In addition, the pole piece 31 is divided into main material 1 and scrap material. The scrap material includes continuous scrap material 2 (such as Figure 1 ) and discrete scrap 3 (as shown Figure 2 The use of discrete scraps can reduce foil waste, but it is difficult to keep the discrete scraps taut with current horizontal laser cutting processes. Summary of the invention

[0005] In view of the shortcomings of the existing methods, the present application proposes a tensioning device and tensioning method for pole piece scraps and pole piece cutting equipment to solve the technical problems such as unstable tensioning of pole piece scraps and dust pollution existing in the related technologies.

[0006] In a first aspect, an embodiment of the present application provides a tensioning device for pole piece scraps, comprising: A first tensioning assembly, used for tensioning the scraps of the pole piece moving along the first direction; A reversing structure, arranged downstream of the first tensioning assembly along the first direction and located on the first side of the pole piece material area, the reversing structure is used to convert the movement direction of the scrap material to a second direction, the second direction intersecting the first direction; The second tensioning assembly is arranged downstream of the reversing structure along the first direction and located at the second side of the pole piece material area. The second tensioning assembly is used to tension the scraps and drive the scraps to move in a direction away from the pole piece material area.

[0007] Optionally, the first tensioning assembly includes a first transmission structure and a first negative pressure structure, the first transmission structure has a first adsorption portion facing the scrap area, and the first negative pressure structure is located on a side of the first adsorption portion away from the scrap area; The first negative pressure structure is used to generate negative pressure to adsorb the scraps to the first adsorption part; the first adsorption part is used to drive the scraps to move along the first direction; Wherein, the movement speed of the first adsorption part is greater than the movement speed of the pole piece.

[0008] Optionally, the tensioning device for the pole piece scraps further comprises a first mounting member; The first transmission structure includes a first driving wheel, a first driven wheel, a first tensioning wheel and a first belt, wherein the first driving wheel, the first driven wheel and the first tensioning wheel are rotatably arranged on the first mounting member, respectively, and the first belt is sleeved on the outer circumference of the first driving wheel, the first driven wheel and the first tensioning wheel, and the portion of the first belt facing the scrap material area serves as a first adsorption portion; in: The first tensioning wheel is movably arranged relative to the first mounting member to adjust the tightness of the first belt; and / or, The tensioning device for the pole piece scraps also includes a first brush, which is in contact with the first belt.

[0009] Optionally, the first negative pressure structure includes: A first negative pressure cavity is arranged in the space surrounded by the first belt; A first negative pressure generating member is communicated with the inner cavity of the first negative pressure cavity to generate negative pressure in the first negative pressure cavity; The tensioning device for the pole piece scrap includes at least one of the following: The first belt has a plurality of through holes, and the inner cavity of the first negative pressure cavity is connected with the plurality of through holes of the first adsorption portion of the first belt; There is a gap between the bottom wall of the first negative pressure cavity and the first adsorption portion; The first brush is located in the first negative pressure cavity; The first brush is rotatably arranged on the first mounting member.

[0010] Optionally, the tensioning device for the pole piece scraps further comprises a second mounting member; The first tensioning assembly comprises a supporting roller and a pressing roller which are rotatably arranged relative to the second mounting member respectively, and there is a gap between the supporting roller and the pressing roller. The pressing roller presses the scrap material between the supporting roller and the pressing roller to tension the scrap material.

[0011] Optionally, the pressure roller is movably arranged relative to the support roller; the first tensioning assembly further comprises an adjusting structure mounted on the second mounting member, the adjusting structure being connected to the pressure roller and used to drive the pressure roller to move so as to adjust the gap between the pressure roller and the support roller; and / or, When the pressure roller rotates, the linear velocity of the outer surface is greater than the movement speed of the pole piece.

[0012] Optionally, the commutation structure comprises: A compressed gas connector connected to a compressed gas source; The blowing cavity is provided with an air inlet and an air outlet. The compressed gas joint is connected with the air inlet of the blowing cavity, and the air outlet of the blowing cavity is arranged toward the scrap material area.

[0013] Optionally, the second tensioning assembly includes a second transmission structure and a second negative pressure structure, the second transmission structure has a second adsorption portion facing the scrap area, and the second negative pressure structure is located on a side of the second adsorption portion away from the scrap area; The second negative pressure structure is used to generate negative pressure to adsorb the scraps to the second adsorption part; the second adsorption part is used to drive the scraps to move along the second direction; Wherein, the movement speed of the second adsorption part is greater than the movement speed of the pole piece.

[0014] Optionally, the movement speed of the second adsorption part is less than or equal to the movement speed of the first adsorption part of the first tensioning assembly or the linear speed of the outer surface of the pressure roller when the pressure roller rotates; and / or, The tensioning device for the pole piece scraps also includes a scraper, which is arranged at one end of the second adsorption part away from the pole piece material area and located outside the second adsorption part. The scraper is inclined relative to the second adsorption part and is used to scrape the scraps off the second adsorption part and guide them to the collection box.

[0015] In a second aspect, an embodiment of the present application provides a pole piece cutting device, comprising: The pole piece cutting device is used to cut the main material and scrap material of the pole piece; The tensioning device for pole piece scraps as mentioned above is arranged at the discharge port of the pole piece cutting device, and is used to tension the pole piece scraps after cutting.

[0016] In a third aspect, an embodiment of the present application provides a method for tensioning pole piece scraps, comprising: Using the pole piece scrap tensioning device as described above to first tension the pole piece scrap moving along the first direction; Using a tensioning device to convert the moving direction of the scrap material to a second direction intersecting the first direction; The tensioning device is used to tension the scraps for a second time and move the scraps in a direction away from the pole sheet area.

[0017] Optionally, using the pole piece scrap tensioning device as described above to tension the pole piece scrap moving along the first direction for the first time includes: Using a tensioning device, a negative pressure adsorption method or a compression method is used to perform a first tensioning on the leftover material of the pole piece moving along the first direction; And, using a tensioning device to convert the movement direction of the scrap material to a second direction intersecting the first direction, comprising: The tensioning device is used to convert the moving direction of the scrap from the first direction to the second direction by blowing compressed gas toward the scrap.

[0018] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include: In the embodiment of the present application, the scraps of the pole piece can be tensioned for the first time through the first tensioning assembly; and then the direction of movement is converted to the second direction through the reversing structure, so that the second tensioning assembly can tension the scraps; then the second tensioning assembly can be used to tension the scraps for the second time, and drive the scraps to move in a direction away from the pole piece material area, so as to facilitate dust removal and collection. By providing the first tensioning assembly, the reversing structure and the second tensioning assembly, the scraps can be tensioned twice, so that the scraps are kept in a tensioned state (because the tensioned state needs to be maintained when cutting the scraps to ensure stable cutting quality), thereby improving the cutting quality and ensuring the cutting effect.

[0019] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 is a structural schematic diagram of a specific example of a pole piece; Figure 2 is a structural schematic diagram of another specific example of a pole piece; Figure 3 A three-dimensional schematic diagram of a specific example of a pole piece cutting device provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a specific example of a pole piece cutting device provided in an embodiment of the present application; Figure 5 for Figure 4 A schematic structural diagram of a first tensioning assembly and a commutation structure of a tensioning device for pole piece scraps of a pole piece cutting device; Figure 6 A structural schematic diagram of a second tensioning assembly of a tensioning device for pole piece scraps provided in an embodiment of the present application; Figure 7 for Figure 6 Another structural schematic diagram of the second tensioning assembly; Figure 8 A three-dimensional schematic diagram of another specific example of a pole piece cutting device provided in an embodiment of the present application; Fig. 9 A schematic structural diagram of another specific example of a pole piece cutting device provided in an embodiment of the present application; Fig.10 A schematic flow chart of a method for tensioning pole piece scraps provided in an embodiment of the present application.

[0021] Reference numerals: 6-first tensioning assembly; 8-first transmission structure; 81-first tensioning wheel; 82-first driving wheel; 83-first driven wheel; 9-first belt; 32-first adsorption part; 10-first negative pressure cavity; 11-first brush; 12-first pipe joint; 31-pole piece; 1-main material; 2-continuous scraps; 3-discrete scraps; 33- Equipment board; 7-second tensioning assembly; 34-second adsorption part; 15-second transmission structure; 151-second driven wheel; 152-second driving wheel; 153-second tensioning wheel; 16-second belt; 17-second negative pressure chamber; 18-second pipe joint; 19-scraper; 20-second brush; 13-compressed gas connector; 14-blowing cavity; 21-pressing roller; 22-adjusting structure; 23-supporting roller; 4-Laser; 5-Cutting dust removal mechanism. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0023] Those skilled in the art will appreciate that, unless expressly stated, the "said" and "the" used herein may also include plural forms. It should be further understood that the term "including" used in the specification of the present application refers to the presence of the features, integers, steps, operations and / or components, but does not exclude the implementation of other features, information, data, steps, operations, components and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" may be implemented as "A", or as "B", or as "A and B".

[0024] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0025] The tensioning device and tensioning method for pole piece scraps and pole piece cutting equipment provided in this application are intended to solve the above technical problems of related technologies.

[0026] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above technical problems with specific embodiments. It should be noted that the following implementations can refer to, draw on or combine with each other, and the same terms, similar features and similar implementation steps in different implementations will not be described repeatedly.

[0027] It should be noted that the pole piece 31 includes the main material 1 and the scraps (such as Figure 1 Continuous scrap 2 or Figure 2 In the embodiment of the present application, the scrap area refers to the area where the scrap is located, that is, the operation or processing area of ​​the pole piece scrap tensioning device provided in the present application for the scrap; the pole piece material area refers to the area where the main material 1 is located, that is, the space between the reversing structure and the second tensioning assembly 7 in the pole piece scrap tensioning device provided in the present application for accommodating and allowing the main material 1 to pass through.

[0028] The present application embodiment provides a tensioning device for pole piece scraps, and the structural schematic diagram of the tensioning device for pole piece scraps is as follows: Figure 3 and Figure 4 As shown, it includes: a first tensioning assembly 6, a reversing structure and a second tensioning assembly 7.

[0029] The first tensioning assembly 6 is used to tension the scraps (such as Figure 1 and Figure 4 Continuous scrap 2 or Figure 2 and Figure 4 The second tensioning assembly 7 is arranged downstream of the first tensioning assembly 6 along the first direction and is located on the second side of the pole piece material area. The second tensioning assembly 7 is arranged downstream of the first tensioning assembly 6 along the first direction and is located on the second side of the pole piece material area. The second tensioning assembly 7 is used to tension the scraps and drive the scraps to move in a direction away from the pole piece material area.

[0030] In the embodiment of the present application, the first tensioning assembly 6, the reversing structure and the second tensioning assembly 7 are arranged in sequence along the first direction of movement of the pole piece 31, that is, on the pole piece 31 (specifically, as shown in FIG. Figure 4 In the first direction of movement of the main material 1), the reversing structure is located downstream of the first tensioning assembly 6, the second tensioning assembly 7 is located downstream of the reversing structure, and the reversing structure and the second tensioning assembly 7 are respectively located on both sides of the area where the main material 1 is located, and the scraps of the pole piece 31 pass through the first tensioning assembly 6, the reversing structure and the second tensioning assembly 7 in sequence.

[0031] In the embodiment of the present application, the tensioning device for the pole piece scraps acts on the pole piece 31 that has been cut by the cutting device. Figure 1 Continuous scraps 2 in, or as Figure 2 The discrete scraps 3) and the main material 1 in the pole piece 31 have been cut apart. The scraps of the pole piece 31 can be tensioned for the first time by the first tensioning assembly 6; and then the direction of movement is converted to the second direction by the reversing structure, and the main material 1 still moves in the first direction, so that the scraps and the main material 1 are separated, and the separated scraps and the main material 1 are independent of each other, which is convenient for the subsequent processing of the scraps and the main material 1, such as the second tensioning, dust removal and collection of the scraps; then the scraps can be tensioned for the second time by the second tensioning assembly 7, and the scraps are driven to move in the direction away from the main material 1, which is convenient for dust removal and collection. By setting the first tensioning assembly 6, the reversing structure and the second tensioning assembly 7, the scraps can be tensioned twice, so that the scraps are kept in a tensioned state (because the tensioned state needs to be maintained when cutting the scraps to ensure the stable cutting quality), thereby improving the cutting quality and ensuring the cutting effect.

[0032] Alternatively, if Figure 4 As shown, in the embodiment of the present application, the first direction is the horizontal direction, and the second direction is the direction intersecting the horizontal direction, for example, the second direction is the vertical direction. The main material 1 moves in the horizontal direction, the reversing structure is located on the upper side of the main material 1, and the second tensioning assembly 7 is located on the lower side of the main material 1. The pole piece 31 can be cut by a pole piece horizontal motion laser cutting process.

[0033] Of course, in other embodiments of the present application, the first direction can also be defined as other directions other than the horizontal direction according to actual needs, such as the vertical direction, that is, the first direction is the vertical direction, and the second direction is the direction intersecting with the vertical direction (such as the horizontal direction), the main material 1 moves along the vertical direction, the reversing structure is located on one side of the left side and the right side of the main material 1, and the second tensioning assembly 7 is located on the other side of the left side and the right side of the main material 1.

[0034] It should be noted that Figure 4 The reference numeral 2 (3) in the figure indicates that the tensioning device for the pole piece scraps can process both the continuous scraps 2 and the discrete scraps 3, that is, it is compatible with the tensioning and discharge of the continuous scraps 2 and the discrete scraps 3 at the same time.

[0035] In some optional embodiments of the present application, such as Figure 5 As shown, the first tensioning assembly 6 includes a first transmission structure 8 and a first negative pressure structure. The first transmission structure 8 has a first adsorption portion 32 (such as Figure 5The area framed by the dotted line in the middle), the first negative pressure structure is located on the side of the first adsorption part 32 away from the scrap area; the first negative pressure structure is used to generate negative pressure to adsorb the scrap to the first adsorption part 32; the first adsorption part 32 is used to drive the scrap to move along the first direction; wherein, the movement speed of the first adsorption part 32 is greater than the movement speed of the pole piece 31.

[0036] In the embodiment of the present application, the first negative pressure structure is located on the side of the first adsorption portion 32 away from the scrap area. The first negative pressure structure generates negative pressure, which can adsorb the scrap to the first adsorption portion 32. The first adsorption portion 32 moves along the first direction, driving the scrap to move along the first direction. Since the movement speed of the first adsorption portion 32 is greater than the movement speed of the pole piece 31, the first adsorption portion 32 drives the scrap to stretch the scrap during the movement, so that the scrap is tensioned, thereby realizing the tensioning effect of the first tensioning component 6 on the scrap, thereby ensuring the stability of cutting.

[0037] Alternatively, if Figure 5 As shown, in the embodiment of the present application, the tensioning device of the pole piece scraps also includes a first mounting member (not shown in the figure); the first transmission structure 8 includes a first driving wheel 82, a first driven wheel 83, a first tensioning wheel 81 and a first belt 9, the first driving wheel 82, the first driven wheel 83 and the first tensioning wheel 81 are respectively rotatably arranged on the first mounting member, the first belt 9 is sleeved on the outer periphery of the first driving wheel 82, the first driven wheel 83 and the first tensioning wheel 81, and the part of the first belt 9 facing the scrap area serves as the first adsorption portion 32.

[0038] In the embodiment of the present application, the first mounting member supports the first transmission structure 8. The first belt 9 is sleeved on the outer circumference of the first driving wheel 82, the first driven wheel 83 and the first tensioning wheel 81. When the driving force is applied to the first driving wheel 82, the first driving wheel 82 can drive the first driven wheel 83, the first tensioning wheel 81 and the first belt 9 to rotate together.

[0039] The portion of the first belt 9 facing the scrap area serves as the first adsorption portion 32. The rotation of the first belt 9 causes the first adsorption portion 32 to move along the first direction, thereby adsorbing and driving the scrap to move along the first direction. It should be noted that, since the first belt 9 rotates during operation, the first adsorption portion 32 is not a fixed portion on the first belt 9, but a portion of the rotating first belt 9 facing the scrap area at any time, which is dynamically updated with the rotation of the first belt 9, that is, different sections of the first belt 9 located in the scrap area during the rotation process are defined as the first adsorption portion 32.

[0040] Optionally, in the embodiment of the present application, the first tensioning wheel 81 is movably arranged relative to the first mounting member to adjust the tightness of the first belt 9. By adjusting the tightness of the first belt 9 by the first tensioning wheel 81, the first belt 9 as the first adsorption portion 32 can ensure the adsorption and tensioning effect of the scraps.

[0041] Optionally, in the embodiment of the present application, the rotating shaft of the first tensioning wheel 81 is movably disposed on the first mounting member, so that the first tensioning wheel 81 is movably disposed relative to the first mounting member and the rotational movement of the first tensioning wheel 81 around the rotating shaft is ensured.

[0042] Alternatively, if Figure 5 As shown, in the embodiment of the present application, the first negative pressure structure includes a first negative pressure cavity 10 and a first negative pressure generating member; the first negative pressure cavity 10 is arranged in the space surrounded by the first belt 9; the first negative pressure generating member is connected to the inner cavity of the first negative pressure cavity 10 to generate negative pressure in the first negative pressure cavity 10.

[0043] In the embodiment of the present application, the first negative pressure cavity 10 is arranged in the space enclosed by the first belt 9, and is located on the side of the first adsorption portion 32 away from the scrap area. The first negative pressure generating part is connected to the inner cavity of the first negative pressure cavity 10. The first negative pressure generating part can generate negative pressure in the first negative pressure cavity 10, thereby adsorbing the scrap to the first adsorption portion 32.

[0044] Optionally, in the embodiment of the present application, the first negative pressure generating component includes but is not limited to a dust collector.

[0045] Alternatively, if Figure 5 As shown, in the embodiment of the present application, the first negative pressure generating member is connected to the first negative pressure cavity 10 through the first pipe joint 12.

[0046] Optionally, in some specific embodiments of the present application, the first belt 9 has a plurality of through holes, and the inner cavity of the first negative pressure cavity 10 is connected to the plurality of through holes of the first adsorption portion 32 of the first belt 9. One end of the plurality of through holes of the first adsorption portion 32 is connected to the inner cavity of the first negative pressure cavity 10, and the other end faces the scrap area, so that the scrap can be adsorbed to the first adsorption portion 32 under the action of the negative pressure in the first negative pressure cavity 10.

[0047] Optionally, in some other specific embodiments of the present application, there is a gap between the bottom wall of the first negative pressure cavity 10 and the first adsorption portion 32. One end of the gap is connected to the inner cavity of the first negative pressure cavity 10, and the other end faces the scrap area, so that the scrap can be adsorbed to the first adsorption portion 32 under the action of the negative pressure in the first negative pressure cavity 10.

[0048] Alternatively, if Figure 5As shown, in the embodiment of the present application, the tensioning device of the pole piece scraps further includes a first brush 11, and the first brush 11 is in contact with the first belt 9. The first belt 9 can be cleaned by the first brush 11.

[0049] Alternatively, if Figure 5 As shown, in the embodiment of the present application, the first brush 11 is rotatably arranged on the first mounting member. The first brush 11 is rotatable relative to the first belt 9, and the first brush 11 is in dynamic contact with the first belt 9, which can improve the cleaning effect of the first belt 9 and the utilization rate of the first brush 11.

[0050] Alternatively, if Figure 5 As shown, in the embodiment of the present application, the first brush 11 is located in the first negative pressure cavity 10. In this way, the dust and the like brushed off from the first belt 9 by the first brush 11 can be sucked away under the negative pressure in the first negative pressure cavity 10, thereby achieving a dust removal effect.

[0051] Specifically, the dust generated by cutting the pole pieces will adhere to the first belt 9 , and the first belt 9 can be self-cleaned by the first brush 11 . The brushed dust falls into the first negative pressure cavity 10 and is sucked away by the dust collector connected to the first pipe joint 12 .

[0052] Optionally, in the embodiment of the present application, the first brush 11 is rotatably mounted in the first negative pressure chamber 10 , so that the first brush 11 is rotatably disposed relative to the first mounting member.

[0053] Of course, in some other optional embodiments of the present application, a through hole can be provided on the first negative pressure cavity 10 according to actual needs, so that the shaft of the first brush 11 passes through the through hole and is rotatably mounted to the first mounting member. In order to ensure the negative pressure effect in the first negative pressure cavity 10, a sealing member (such as a sealing ring) can be provided between the inner wall of the through hole and the outer wall of the shaft of the first brush 11, and a bearing can also be provided so that the shaft of the first brush 11 is rotatably mounted in the through hole through the bearing.

[0054] Alternatively, if Figure 3 As shown, in the embodiment of the present application, the first mounting member is mounted on the equipment plate 33 of the pole piece cutting equipment. The first tensioning assembly 6 is finally mounted on the equipment plate 33 through the first mounting member.

[0055] Alternatively, if Figure 5 As shown, in the embodiment of the present application, the reversing structure includes a compressed gas connector 13 and a blowing cavity 14, and the compressed gas connector 13 is connected to the compressed gas source; the blowing cavity 14 has an air inlet and an air outlet, and the compressed gas connector 13 is connected to the air inlet of the blowing cavity 14, and the air outlet of the blowing cavity 14 is arranged toward the scrap area.

[0056] In the embodiment of the present application, the compressed gas source is used to provide compressed gas, and the compressed gas enters the blowing cavity 14 through the compressed gas connector 13 and the air inlet of the blowing cavity 14, and is blown toward the scraps (such as Figure 5 The vertical arrow below the reference numeral 14 indicates the blowing direction of the compressed gas), and the movement direction of the scrap is changed to the second direction under the blowing action of the compressed gas. The reversing structure can be used to non-contactly reverse the horizontally moving scrap, and continuous production can be achieved to ensure stable cutting.

[0057] Optionally, in an embodiment of the present application, compressed gas includes but is not limited to compressed air.

[0058] Of course, in some other optional embodiments of the present application, the reversing structure can also include a baffle (not shown) according to actual needs. The baffle is tilted relative to the first direction. The scraps passing through the first tensioning assembly 6 move to the baffle and come into contact with the baffle to be deformed, so that the movement direction is changed to the second direction.

[0059] Alternatively, if Figure 6 As shown, in the embodiment of the present application, the second tensioning assembly 7 includes a second transmission structure 15 and a second negative pressure structure, and the second transmission structure 15 has a second adsorption portion 34 (such as Figure 6 The second negative pressure structure is located on the side of the second adsorption portion 34 away from the scrap area (the area framed by the dotted line); the second negative pressure structure is used to generate negative pressure to adsorb the scrap to the second adsorption portion 34; the second adsorption portion 34 is used to drive the scrap to move along the second direction; wherein the movement speed of the second adsorption portion 34 is greater than the movement speed of the pole piece 31.

[0060] In the embodiment of the present application, the second negative pressure structure is located on the side of the second adsorption portion 34 away from the scrap area. The second negative pressure structure generates negative pressure, which can adsorb the scrap to the second adsorption portion 34. The second adsorption portion 34 moves along the second direction, driving the scrap to move along the second direction. Since the movement speed of the second adsorption portion 34 is greater than the movement speed of the pole piece 31, the second adsorption portion 34 drives the scrap to stretch the scrap during the movement, so that the scrap is tensioned, thereby realizing the tensioning effect of the second tensioning component 7 on the scrap, thereby ensuring the stability of cutting.

[0061] Alternatively, if Figure 5 and Figure 6 As shown, in the embodiment of the present application, the structure and function of the second tensioning assembly 7 are the same or similar to those of the first tensioning assembly 6, except that Figure 4 As shown, the first adsorption portion 32 of the first tensioning assembly 6 moves along the first direction, and the second adsorption portion 34 of the second tensioning assembly 7 moves along the second direction.

[0062] Specifically, Figure 6 As shown, in the embodiment of the present application, the second transmission structure 15 includes a second driving wheel 152, a second driven wheel 151, a second tensioning wheel 153 and a second belt 16. The second driving wheel 152, the second driven wheel 151 and the second tensioning wheel 153 are rotatably arranged on a third mounting member (not shown in the figure). The second belt 16 is sleeved on the outer periphery of the second driving wheel 152, the second driven wheel 151 and the second tensioning wheel 153. The part of the second belt 16 facing the scrap area serves as a second adsorption portion 34.

[0063] In the embodiment of the present application, the third mounting member supports the second transmission structure 15. When a driving force is applied to the second driving wheel 152, the second driving wheel 152 can drive the second driven wheel 151, the second tensioning wheel 153 and the second belt 16 to rotate together.

[0064] The part of the second belt 16 facing the scrap area serves as the second adsorption portion 34. The rotation of the second belt 16 causes the second adsorption portion 34 to move in the second direction, thereby adsorbing and driving the scrap to move in the second direction. It should be noted that, since the second belt 16 rotates during operation, the second adsorption portion 34 is not a fixed part of the second belt 16, but a part of the rotating second belt 16 facing the scrap area at any time. This part is dynamically updated with the rotation of the second belt 16, that is, different sections of the second belt 16 located in the scrap area during the rotation process are defined as the second adsorption portion 34. The second belt 16 absorbs the scrap coming from the reverse direction and discharges it.

[0065] Optionally, in the embodiment of the present application, the second tensioning wheel 153 is movably arranged relative to the third mounting member to adjust the tightness of the second belt 16, thereby ensuring the adsorption and tensioning effect of the second belt 16 as the second adsorption portion 34 on the scraps.

[0066] Optionally, in the embodiment of the present application, the first driving wheel 82 and the second driving wheel 152 are driven separately so that the rotation speed of the first driving wheel 82 is greater than or equal to the rotation speed of the second driving wheel 152; or, the first driving wheel 82 and the second driving wheel 152 rotate synchronously and have the same rotation speed.

[0067] Specifically, in the embodiment of the present application, the tensioning device for the pole piece scraps further includes a first driving unit, which is connected to the first driving wheel 82 and is used to drive the first driving wheel 82 to rotate. Optionally, the first driving unit includes but is not limited to a motor.

[0068] Optionally, in the embodiment of the present application, the tensioning device for the pole piece scraps further includes a second driving unit, which is connected to the second driving wheel 152 and is used to drive the second driving wheel 152 to rotate. Optionally, the second driving unit includes but is not limited to a motor.

[0069] Optionally, in the embodiment of the present application, the rotation speeds of the first driving wheel 82 and the second driving wheel 152 can be adjusted by the first driving unit and the second driving unit, respectively, so that the rotation speed of the first driving wheel 82 is greater than or equal to the second driving wheel 152. Such a setting is flexible in operation and has strong adaptability. When the first driving wheel 82 rotates, the linear velocity of the outer surface is greater than or equal to the linear velocity of the outer surface when the second driving wheel 152 rotates, so that the moving speed of the first adsorption part 32 along the first direction is greater than or equal to the moving speed of the second adsorption part 34 along the second direction. Such a setting can not only ensure the tensioning effect of the first tensioning assembly 6 and the second tensioning assembly 7 on the scraps at the same time, but also avoid the risk that if the rotation speed of the second driving wheel 152 is greater than that of the first driving wheel 82, the second tensioning assembly 7 will easily affect or interfere with the tensioning effect of the first tensioning assembly 6 on the scraps.

[0070] Of course, in other optional embodiments of the present application, only the first drive unit or the second drive unit can be provided according to actual needs, and the first driving wheel 82 and one of the first driven wheel 83 of the first transmission structure 8 and the second driving wheel 152 and one of the second driven wheel 151 of the second transmission structure 15 are connected by a synchronous belt, so that the moving speed of the first adsorption unit 32 along the first direction is equal to the moving speed of the second adsorption unit 34 along the second direction. Such a setting can simplify the structure and save electricity and resources.

[0071] Specifically, in the embodiment of the present application, the second driving unit drives the second driving wheel 152 to rotate, and the second driven wheel 151 rotates synchronously with the first driving wheel 82 through the synchronous belt. The second driving wheel 152 and the first driving wheel 82 can be driven simultaneously by only one driving unit to make the first tensioning assembly 6 and the second tensioning assembly 7 work.

[0072] Alternatively, if Figure 3 and Figure 8 As shown, in the embodiment of the present application, the third mounting member is mounted on the equipment plate 33 of the pole piece cutting equipment. The second tensioning assembly 7 is finally mounted on the equipment plate 33 through the third mounting member.

[0073] Alternatively, if Figure 6 As shown, in the embodiment of the present application, the second negative pressure structure includes a second negative pressure cavity 17, a second pipe joint 18 and a second negative pressure generating member; the second negative pressure cavity 17 is arranged in the space surrounded by the second belt 16, and is located on the side of the second adsorption portion 34 away from the scrap area, and the second negative pressure generating member is connected to the inner cavity of the second negative pressure cavity 17 through the second pipe joint 18 to generate negative pressure in the second negative pressure cavity 17, thereby adsorbing the scrap to the second adsorption portion 34.

[0074] Optionally, in the embodiment of the present application, the second negative pressure generating component includes but is not limited to a dust collector.

[0075] Optionally, in some specific embodiments of the present application, the second belt 16 has a plurality of through holes, and the inner cavity of the second negative pressure cavity 17 is connected to the plurality of through holes of the second adsorption portion 34 of the second belt 16; or, there is a gap between the bottom wall of the second negative pressure cavity 17 and the second adsorption portion 34. One end of the through hole or gap is connected to the inner cavity of the second negative pressure cavity 17, and the other end faces the scrap area, so that the scrap can be adsorbed to the second adsorption portion 34 under the action of the negative pressure in the second negative pressure cavity 17.

[0076] Optionally, in the embodiment of the present application, the tensioning device for the pole piece scraps further includes a second brush 20 , and the second brush 20 is in contact with the second belt 16 , and can clean the second belt 16 .

[0077] Alternatively, if Figure 6 and Figure 7 As shown, in the embodiment of the present application, the second brush 20 is rotatably disposed in the second negative pressure cavity 17, and the second brush 20 is in dynamic contact with the second belt 16, which can improve the cleaning effect of the second belt 16 and the utilization rate of the second brush 20, and the dust brushed off from the second belt 16 by the second brush 20 can be sucked away under the action of the negative pressure in the second negative pressure cavity 17, thereby achieving a dust removal effect.

[0078] Alternatively, if Figure 6 As shown, in the embodiment of the present application, the tensioning device for the pole piece scraps also includes a scraper 19, which is arranged at one end of the second adsorption portion 34 away from the pole piece material area and is located on the outside of the second adsorption portion 34. The scraper 19 is inclined relative to the second adsorption portion 34, and is used to scrape the scraps from the second adsorption portion 34 and guide them to the collection box.

[0079] Specifically, Figure 6 As shown, in the embodiment of the present application, the scraper 19 is arranged at the turning position where the second belt 16 cooperates with the second driving wheel 152, is located on the outside of the second belt 16 and is inclined relative to the second belt 16. The scraper 19 is mainly used to guide the scraps to the waste box or the collection box, collect and store the scraps, and prevent the scraps from being sucked by the second belt 16 and entangled on the second belt 16.

[0080] Specifically, Figure 4 As shown, in one embodiment of the present application, the scraps are tensioned twice by a first tensioning assembly 6 and a second tensioning assembly 7 using a double negative pressure adsorption method to maintain the tensioned state of the scraps and discharge them.

[0081] The cut scraps are negatively adsorbed by the first tensioning component 6. The movement speed of the first belt 9 of the first tensioning component 6 should be slightly greater than the movement speed of the pole piece 31 to keep the scraps tensioned. Since the movement of the scraps in the horizontal direction needs to be switched to movement in the vertical direction, a positive pressure airflow is generated through the compressed gas connector 13 and the blowing cavity 14 of the reversing structure to reverse the horizontal movement of the scraps and adsorb them onto the second tensioning component 7 by negative pressure. The movement speed of the second belt 16 of the second tensioning component 7 should be slightly greater than the movement speed of the pole piece 31 to keep the scraps tensioned, and the movement speed of the second belt 16 should be less than or equal to the movement speed of the first belt 9.

[0082] The embodiment of the present application can simultaneously support the tensioning of the continuous scraps 2 and the discrete scraps 3 by means of double negative pressure adsorption, thereby improving the cutting quality and ensuring the cutting effect.

[0083] In some other optional embodiments of the present application, Fig. 9 As shown, the tensioning device for the pole piece scraps also includes a second mounting member (not shown in the figure), and the first tensioning assembly includes a support roller 23 and a pressure roller 21 which are rotatably arranged relative to the second mounting member, respectively, and there is a gap between the support roller 23 and the pressure roller 21. The pressure roller 21 presses the scraps between the support roller 23 and the pressure roller 21 to tension the scraps.

[0084] In the embodiment of the present application, the support roller 23 is used to support the pole piece 31, and the pressure roller 21 is used to press the scraps of the pole piece 31 between the support roller 23 and the pressure roller 21 to tension the scraps, thereby realizing the tensioning effect of the first tensioning component on the scraps. The pole piece 31 moves along the first direction, and the support roller 23 and the pressure roller 21 are rotatably arranged relative to the second mounting member. During the movement of the pole piece 31, the support roller 23 and the pressure roller 21 rotate, and the scraps remain in a tensioned state and pass through the gap between the support roller 23 and the pressure roller 21. The scraps roll with the support roller 23 and the pressure roller 21 respectively, and the scraps have little resistance to movement.

[0085] Alternatively, if Fig. 9 As shown, in the embodiment of the present application, the pressing roller 21 is movably arranged relative to the supporting roller 23, so that the gap between the pressing roller 21 and the supporting roller 23 is adjustable. The gap between the pressing roller 21 and the supporting roller 23 can be adaptively adjusted according to the wear conditions of the pressing roller 21 and the supporting roller 23 and the different sizes (such as different thicknesses) of the scraps, so that the tensioning effect on the scraps is more stable.

[0086] Alternatively, if Fig. 9 As shown, in the embodiment of the present application, the first tensioning assembly 6 also includes an adjustment structure 22 installed on the second mounting member, and the adjustment structure 22 is connected to the pressure roller 21 and is used to drive the pressure roller 21 to move to adjust the gap size between the pressure roller 21 and the support roller 23.

[0087] Optionally, in an embodiment of the present application, the adjustment structure 22 includes a support member and an elastic member (not shown in the figure), the support member is fixed on the second mounting member, one end of the elastic member is connected to the support member, and the other end is connected to the rotating shaft of the pressure roller 21, and the elastic member applies a force to the rotating shaft of the pressure roller 21 to move the pressure roller 21 toward the support roller 23, so that the pressure roller 21 always has a tendency to press against the support roller 23, thereby achieving the purpose of pressing the scraps onto the support roller 23 through the pressure roller 21.

[0088] Optionally, in the embodiment of the present application, the support member includes but is not limited to a support rod or a support plate. The elastic member includes but is not limited to a spring. Optionally, the spring is installed between the support member and the rotating shaft of the pressure roller 21 in a compressed state.

[0089] Optionally, in the embodiment of the present application, when the pressure roller 21 rotates, the linear speed of the outer surface is greater than the moving speed of the pole piece 31. In this way, the scraps can be tensioned under the compression and driving of the pressure roller 21.

[0090] Optionally, in some specific embodiments of the present application, the linear velocity of the outer surface of the pressing roller 21 when rotating is greater than or equal to the movement velocity of the second adsorption portion 34 of the second tensioning assembly 7. This arrangement can not only ensure the tensioning effect of the first tensioning assembly and the second tensioning assembly 7 on the scraps at the same time, but also avoid the risk that if the linear velocity of the outer surface of the pressing roller 21 when rotating is less than the movement velocity of the second adsorption portion 34, the second tensioning assembly 7 may affect or interfere with the tensioning effect of the first tensioning assembly on the scraps.

[0091] Optionally, in an embodiment of the present application, the tensioning device for the pole piece scraps also includes a third driving unit, which is connected to the pressure roller 21 to drive the pressure roller 21 to rotate, so that the linear speed of the outer surface of the pressure roller 21 when rotating is greater than or equal to the movement speed of the second adsorption part 34 of the second tensioning assembly 7.

[0092] Of course, in some other optional embodiments of the present application, only the second drive unit or the third drive unit can be set according to actual needs, and the pressure roller 21 and one of the second driving wheel 152 and the second driven wheel 151 of the second tensioning assembly 7 can be set to rotate synchronously, so that the linear speed of the outer surface of the pressure roller 21 when it rotates is equal to the moving speed of the second adsorption part 34 along the second direction, which can simplify the structure and save electricity and resources.

[0093] Specifically, in the embodiment of the present application, the second driving unit drives the second driving wheel 152 to rotate, and the second driven wheel 151 rotates synchronously with the pressure roller 21 through the synchronous belt. The second driving wheel 152 and the pressure roller 21 can be driven simultaneously by only one driving unit to make the first tensioning assembly and the second tensioning assembly 7 work.

[0094] Alternatively, if Figure 8As shown, in the embodiment of the present application, the second mounting member is mounted on the equipment plate 33 of the pole piece cutting equipment. The first tensioning assembly (including the support roller 23 and the pressure roller 21) is finally mounted on the equipment plate 33 through the second mounting member.

[0095] Alternatively, if Fig. 9 As shown, in the embodiment of the present application, the tensioning device of the pole piece scraps also includes a reversing structure (not shown) and a second tensioning assembly 7. It should be noted that the structure and arrangement of the reversing structure and the second tensioning assembly 7 in the embodiment of the present application (the first tensioning assembly includes the pressure roller 21 and the support roller 23) may be the same or similar to the structure and arrangement of the reversing structure and the second tensioning assembly 7 in the above embodiment (the first tensioning assembly 6 includes the first transmission structure 8 and the first negative pressure structure), and will not be repeated here.

[0096] Specifically, Fig. 9 As shown, in another embodiment of the present application, the scraps are tensioned twice by the first tensioning assembly and the second tensioning assembly 7, using a combination of compression by the pressure roller 21 and negative pressure adsorption by the second tensioning assembly 7 to maintain the tensioned state of the scraps and discharge them.

[0097] The pressure roller 21 presses the scraps to reduce the distance from the cutting point to the second belt 16 of the second tensioning assembly 7, so that the scraps are kept in a tensioned state. The pressure roller 21 can adjust the pressure up and down through the adjustment structure 22, and the pressure roller 21 can be lifted to facilitate operation of the cutting area.

[0098] The embodiment of the present application can process continuous scraps through a combination of compression and negative pressure adsorption to achieve tensioning and discharge.

[0099] The tensioning device for pole piece scraps provided in the embodiment of the present application tensions and holds the scraps by arranging a pressure roller or a negative pressure adsorption belt at the position closest to the cutting point, which can improve the cutting quality and ensure the cutting effect. The device can be applied to technical fields such as battery pole piece laser cutting, discharge, dust removal, and collection.

[0100] Based on the same inventive concept, the embodiment of the present application provides a pole piece cutting device. The structural schematic diagram of the pole piece cutting device is as follows: Figure 3 , Figure 4 , Figure 8 and Fig. 9 As shown, the pole piece cutting device comprises: a pole piece cutting device and a tensioning device for pole piece scraps as described above; the pole piece cutting device is used to separate the main material 1 of the pole piece 31 and the scraps (such as Figure 1 Continuous scrap 2 or Figure 2 The discrete scraps 3) are cut; the tensioning device of the pole piece scraps is arranged at the discharge port of the pole piece cutting device, and is used to tension the cut pole piece 31 scraps.

[0101] In the embodiment of the present application, the pole piece cutting device and the pole piece scrap tensioning device are sequentially arranged along the movement direction of the pole piece 31, that is, the pole piece scrap tensioning device is located downstream of the pole piece cutting device. The pole piece cutting device is used to cut the pole piece 31 so that the pole piece 31 scrap and the main material 1 are cut apart; the pole piece scrap tensioning device is arranged at the discharge port of the pole piece cutting device, which is located at the position closest to the cutting point, and is used to tension and discharge the pole piece 31 scrap after cutting. The first tensioning component of the pole piece scrap tensioning device is placed as close to the cutting point as possible so that the just-cut scrap can be pressed or sucked, which can ensure the stability of the tension in the cutting area and the cutting quality.

[0102] Optionally, the embodiment of the present application may cut the pole piece 31 by laser cutting.

[0103] Alternatively, if Figure 4 and Fig. 9 As shown, in the embodiment of the present application, the pole piece cutting device includes a laser 4 and a cutting dust removal mechanism 5, the laser 4 is used to emit laser, and the cutting dust removal mechanism 5 has a cutting station and a dust removal structure. The pole piece 31 to be cut is irradiated by the laser emitted by the laser 4 through the cutting station, and the laser cutting is completed, and the scraps of the pole piece 31 and the main material 1 are cut apart. The dust generated during the laser cutting of the pole piece 31 is removed by the dust removal structure. The scraps of the pole piece 31 cut by the pole piece cutting device are tensioned and discharged by the tensioning device of the pole piece scraps, so as to facilitate dust removal and collection of the scraps.

[0104] The pole piece cutting equipment in the embodiment of the present application integrates laser cutting, dust removal, scrap tensioning, discharge, collection, etc., which can improve the quality of laser cutting and ensure the cutting effect.

[0105] Optionally, the pole piece cutting equipment in the embodiment of the present application may be a laser cutting equipment.

[0106] It should be noted that since the pole piece cutting equipment of the embodiment of the present application includes the tensioning device for pole piece scraps of the embodiment of the present application, the pole piece cutting equipment of the embodiment of the present application also has the above-mentioned beneficial effects of the tensioning device for pole piece scraps of the embodiment of the present application, which will not be repeated here.

[0107] Based on the same inventive concept, the embodiment of the present application provides a tensioning method for pole piece scraps, and the flow chart of the tensioning method for pole piece scraps is as follows: Fig.10 As shown, the tensioning method of the pole piece scrap includes: S101, using the pole piece scrap tensioning device as described above, to tighten the pole piece 31 scrap (such as Figure 1 Continuous scrap 2 or Figure 23) First tensioning of discrete scraps.

[0108] S102, using a tensioning device to convert the movement direction of the scrap material to a second direction intersecting the first direction.

[0109] S103, using a tensioning device to tension the scraps for a second time and move the scraps in a direction away from the pole piece material area. In the embodiment of the present application, the tensioning device of the pole piece scraps can be used to tension the scraps of the pole piece 31 moving in the first direction for the first time, and convert the moving direction of the scraps to the second direction (the main material 1 still moves in the first direction), and then the scraps can be tensioned for a second time, and the scraps can be driven to move in a direction away from the main material 1, thereby achieving two tensioning of the scraps, keeping the scraps in a tensioned state, thereby improving the cutting quality and ensuring the cutting effect.

[0110] In some optional embodiments of the present application, the pole piece scrap tensioning device as described above is used to first tension the pole piece 31 scrap moving along the first direction, including: The tensioning device is used to perform the first tensioning on the scraps of the pole piece 31 moving along the first direction by means of negative pressure adsorption.

[0111] Alternatively, if Figure 4 and Figure 5 As shown, in the embodiment of the present application, the first tensioning assembly 6 (including the first transmission structure 8 and the first negative pressure structure) is utilized to perform negative pressure adsorption on the scraps and drive the scraps to move along the first direction. The moving speed of the first adsorption portion 32 along the first direction is greater than the moving speed of the pole piece 31 along the first direction. The first adsorption portion 32 drives the scraps to stretch during the movement, so that the scraps are tensioned, thereby realizing the first tensioning of the scraps.

[0112] Optionally, in an embodiment of the present application, using a tensioning device to convert the movement direction of the scrap material to a second direction intersecting the first direction includes: The tensioning device is used to convert the moving direction of the scrap from the first direction to the second direction by blowing compressed gas toward the scrap.

[0113] Alternatively, if Figure 4 and Figure 5 As shown, in the embodiment of the present application, a reversing structure (including a compressed gas connector 13 and a blowing cavity 14) is used to blow compressed gas to the scraps, and non-contact reversal of the scraps is performed to achieve conversion of the movement direction of the scraps to a second direction.

[0114] Optionally, in an embodiment of the present application, the scraps are tensioned for a second time using a tensioning device and are moved in a direction away from the pole piece material area, including: The tensioning device is used to tension the scraps for the second time by means of negative pressure adsorption, and drives the scraps to move in a direction away from the pole piece area.

[0115] Alternatively, if Figure 4 , Figure 6 and Figure 7 As shown, in the embodiment of the present application, the second tensioning assembly 7 is used to perform negative pressure adsorption on the scraps and drive the scraps to move in a direction away from the main material 1. The moving speed of the second adsorption portion 34 is greater than the moving speed of the pole piece 31. The second adsorption portion 34 drives the scraps to stretch the scraps during the movement, so that the scraps are tensioned, thereby achieving a second tensioning of the scraps.

[0116] The embodiment of the present application uses a double negative pressure adsorption method to tension the scraps twice, thereby maintaining the tensioned state and discharging the scraps.

[0117] In some other optional embodiments of the present application, the pole piece scrap tensioning device as described above is used to first tension the pole piece 31 scrap moving along the first direction, including: The tensioning device is used to perform a first tensioning on the scraps of the pole piece 31 moving along the first direction by means of compression.

[0118] Alternatively, if Fig. 9 As shown, in the embodiment of the present application, the first tensioning assembly (including the pressure roller 21 and the support roller 23) is used to perform the first tensioning on the scraps.

[0119] The subsequent steps of converting the scraps to move in the second direction and performing a second tensioning in the embodiment of the present application may be the same or similar to the steps and methods of the aforementioned embodiment (i.e., tensioning the scraps for the first time using the first tensioning assembly 6 including the first transmission structure 8 and the first negative pressure structure), and will not be repeated here.

[0120] It should be noted that, since the tensioning method of pole piece scraps provided in the embodiment of the present application utilizes the tensioning device of pole piece scraps in the embodiment of the present application to tension and discharge the scraps, the tensioning method of pole piece scraps provided in the embodiment of the present application also has the above-mentioned beneficial effects of the tensioning device of pole piece scraps in the embodiment of the present application, which will not be repeated here.

[0121] The tensioning method of pole piece scraps provided in the embodiment of the present application can keep the scraps tensioned, while ensuring the stability of cutting quality, improving the dust removal wind speed, and realizing waste collection.

[0122] By applying the embodiments of the present application, at least the following beneficial effects can be achieved: In the embodiment of the present application, the scraps of the pole piece can be tensioned for the first time through the first tensioning assembly; and then the direction of movement is converted to the second direction through the reversing structure, so that the second tensioning assembly can tension the scraps; then the second tensioning assembly can be used to tension the scraps for the second time, and drive the scraps to move in a direction away from the pole piece material area, so as to facilitate dust removal and collection. By providing the first tensioning assembly, the reversing structure and the second tensioning assembly, the scraps can be tensioned twice, so that the scraps are kept in a tensioned state (because the tensioned state needs to be maintained when cutting the scraps to ensure stable cutting quality), thereby improving the cutting quality and ensuring the cutting effect.

[0123] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0124] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0125] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0126] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0127] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A tensioning device for pole piece scraps, characterized in that: include: A first tensioning assembly, used for tensioning the scraps of the pole piece moving along the first direction; A reversing structure, arranged downstream of the first tensioning assembly along the first direction and located at a first side of the pole piece material area, the reversing structure is used to convert the movement direction of the scrap material to a second direction, the second direction intersecting the first direction; The second tensioning assembly is arranged downstream of the reversing structure along the first direction and located at the second side of the pole piece material area. The second tensioning assembly is used to tension the scraps and drive the scraps to move in a direction away from the pole piece material area.

2. The tensioning device for pole piece scraps according to claim 1, characterized in that: The first tensioning assembly includes a first transmission structure and a first negative pressure structure, the first transmission structure has a first adsorption portion facing the scrap area, and the first negative pressure structure is located on a side of the first adsorption portion away from the scrap area; The first negative pressure structure is used to generate negative pressure to adsorb the scraps to the first adsorption part; the first adsorption part is used to drive the scraps to move along the first direction; Wherein, the movement speed of the first adsorption part is greater than the movement speed of the pole piece.

3. The tensioning device for pole piece scraps according to claim 2, characterized in that: Also included is a first mounting member; The first transmission structure comprises a first driving wheel, a first driven wheel, a first tensioning wheel and a first belt, wherein the first driving wheel, the first driven wheel and the first tensioning wheel are rotatably arranged on the first mounting member, respectively, the first belt is sleeved on the outer circumference of the first driving wheel, the first driven wheel and the first tensioning wheel, and the portion of the first belt facing the scrap material area serves as the first adsorption portion; in: The first tensioning wheel is movably arranged relative to the first mounting member to adjust the tightness of the first belt; and / or, The tensioning device for the pole piece scraps also includes a first brush, and the first brush is in contact with the first belt.

4. The tensioning device for pole piece scraps according to claim 3, characterized in that: The first negative pressure structure comprises: A first negative pressure cavity is arranged in the space surrounded by the first belt; a first negative pressure generating member, connected to the inner cavity of the first negative pressure cavity, so as to generate negative pressure in the first negative pressure cavity; The tensioning device for the pole piece scraps includes at least one of the following: The first belt has a plurality of through holes, and the inner cavity of the first negative pressure cavity is connected to the plurality of through holes of the first adsorption portion of the first belt; There is a gap between the bottom wall of the first negative pressure cavity and the first adsorption portion; The first brush is located in the first negative pressure cavity; The first brush is rotatably arranged on the first mounting member.

5. The tensioning device for pole piece scraps according to claim 1, characterized in that: Also included is a second mounting member; The first tensioning assembly includes a supporting roller and a pressing roller which are rotatably arranged relative to the second mounting member, respectively, and there is a gap between the supporting roller and the pressing roller. The pressing roller presses the scrap material between the supporting roller and the pressing roller to tension the scrap material.

6. The tensioning device for pole piece scraps according to claim 5, characterized in that: The pressure roller is movably arranged relative to the support roller; the first tensioning assembly further comprises an adjusting structure mounted on the second mounting member, the adjusting structure being connected to the pressure roller and used for driving the pressure roller to move so as to adjust the gap between the pressure roller and the support roller; and / or, When the pressure roller rotates, the linear speed of the outer surface is greater than the moving speed of the pole piece.

7. The tensioning device for pole piece scraps according to any one of claims 1 to 6, characterized in that: The commutation structure comprises: A compressed gas connector connected to a compressed gas source; The blowing cavity has an air inlet and an air outlet. The compressed gas joint is connected to the air inlet of the blowing cavity, and the air outlet of the blowing cavity is arranged toward the scrap area.

8. The tensioning device for pole piece scraps according to claim 1, characterized in that: The second tensioning assembly includes a second transmission structure and a second negative pressure structure, the second transmission structure has a second adsorption portion facing the scrap area, and the second negative pressure structure is located on a side of the second adsorption portion away from the scrap area; The second negative pressure structure is used to generate negative pressure to adsorb the scraps to the second adsorption part; the second adsorption part is used to drive the scraps to move along the second direction; Wherein, the movement speed of the second adsorption portion is greater than the movement speed of the pole piece.

9. The tensioning device for pole piece scraps according to claim 8, characterized in that: The movement speed of the second adsorption part is less than or equal to the movement speed of the first adsorption part of the first tensioning assembly or the linear speed of the outer surface of the pressure roller when the pressure roller rotates; and / or, The tensioning device for the pole piece scraps also includes a scraper, which is arranged at one end of the second adsorption portion away from the pole piece material area and located on the outside of the second adsorption portion. The scraper is inclined relative to the second adsorption portion and is used to scrape the scraps off the second adsorption portion and guide them to a collection box.

10. A pole piece cutting device, characterized in that: include: The pole piece cutting device is used to cut the main material and scrap material of the pole piece; The pole piece scrap tensioning device according to any one of claims 1 to 9 is arranged at the discharge port of the pole piece cutting device, and is used to tension the pole piece scraps after cutting.

11. A method for tensioning pole piece scraps, characterized in that: include: Using the pole piece scrap tensioning device as claimed in any one of claims 1 to 9 to first tension the pole piece scrap moving along the first direction; Using the tensioning device to convert the movement direction of the scrap material to a second direction intersecting the first direction; The tensioning device is used to tension the scraps for a second time and move the scraps in a direction away from the pole piece area.

12. The method for tensioning pole piece scraps according to claim 11, characterized in that: The method of first tensioning the pole piece scrap moving along the first direction using the pole piece scrap tensioning device according to any one of claims 1 to 9 comprises: Using the tensioning device, the scraps of the pole piece moving along the first direction are tensioned for the first time by adopting a negative pressure adsorption method or a compression method; And, using the tensioning device to convert the movement direction of the scrap material to a second direction intersecting the first direction, comprising: The tensioning device is used to convert the moving direction of the scrap material from a first direction to a second direction by blowing compressed gas toward the scrap material.

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