Pole processing device, battery production line and production process

Abstract

The present application relates to a pole piece processing device, a battery production line, and a production process, comprising: a conveying assembly for conveying a target part to be rolled; a rolling assembly comprising a first pressing roller and a second pressing roller; the second pressing roller being arranged opposite the first pressing roller, with a rolling gap formed between the second pressing roller and the first pressing roller for the target part to pass through; wherein the first pressing roller is rotatable about its own axis and includes an adsorption assembly; the adsorption assembly is configured to generate adsorption force on a portion of the outer circumference of the first pressing roller. The pole piece processing device, battery production line, and production process of the present application embodiments have the advantage of stable rolling quality.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a pole piece processing device, a battery production line and a production process. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] In the electrode assembly manufacturing process, positive and negative electrode sheets need to be rolled. However, as the sheets travel from the conveyor assembly to the rollers, fluctuations often occur, affecting the quality of the rolling process. Summary of the Invention

[0004] Based on this, it is necessary to provide a pole piece processing device, a battery production line and a production process to address the problem of unstable rolling quality.

[0005] A first aspect of an embodiment of the present application provides a pole piece processing device, comprising: a conveying assembly for conveying a target piece to be rolled; a rolling assembly, comprising a first pressing roller and a second pressing roller; the second pressing roller is arranged opposite to the first pressing roller, and a rolling gap is formed between the second pressing roller and the first pressing roller for the target piece to pass through; wherein, the first pressing roller is configured to rotate around its own axis, and the first pressing roller includes an adsorption assembly; the adsorption assembly is configured to generate an adsorption force on a portion of the outer circumference of the first pressing roller.

[0006] By setting up an adsorption component, the adsorption component enables part of the outer circumference of the first pressing roller to generate adsorption force, and the conveying component conveys the target part to be rolled to the rolling component. Once the target part is separated from the conveying component, it can be adsorbed and fixed by the part of the outer circumference with adsorption force in the first pressing roller, effectively reducing or even eliminating the free end of the target part. The target part rotates toward the side close to the rolling gap with the first pressing roller, and then the first pressing roller and the second pressing roller jointly complete the rolling compounding; since the target part can be effectively kept fixed during the entire transfer process before rolling compounding, the material line fluctuation of the target part can be effectively reduced, and the OH size of the electrode assembly can be effectively controlled to ensure stable quality after rolling compounding.

[0007] In one embodiment, when part of the outer circumference of the first pressing roller rotates around its own axis to within the target range, the part of the outer circumference is defined as a first area; the adsorption component is configured to generate an adsorption force in the first area; the conveying component is used to convey the target part to be rolled to the first area; the target range refers to a fan-shaped range formed by sweeping the central angle of the circle in the direction close to the conveying component with the axis center of the first pressing roller as the coordinate origin and the axis passing through the coordinate origin as the starting edge.

[0008] By setting an adsorption component, the adsorption component generates an adsorption force on the part of the outer peripheral surface of the first pressing roller within the target range when it rotates, and the conveying component conveys the target part to be rolled to the first area, so that once the target part leaves the conveying component, it can be adsorbed and fixed by the first area with adsorption force, effectively reducing or even eliminating the free end of the target part, and the target part rotates along the first area toward the side close to the rolling gap, and then the first pressing roller and the second pressing roller jointly complete the rolling compound; since the target part can be effectively kept fixed during the entire transfer process before rolling compounding, the material line fluctuation of the target part can be effectively reduced, and the OH size of the electrode assembly can be effectively controlled to ensure stable quality after rolling compounding.

[0009] In one embodiment, the axis connecting the second roller and the first roller is the Y-axis; the target range refers to the fan-shaped range formed by sweeping the center angle of the circle with the axis of the first roller as the coordinate origin and the Y-axis as the starting edge in the direction approaching the conveying component. By setting the target range to the fan-shaped range formed by sweeping the center angle of the circle with the axis of the first roller as the coordinate origin and the Y-axis as the starting edge in the direction approaching the conveying component, once the target part is separated from the conveying component, it can be adsorbed and fixed by the first area with adsorption force, effectively reducing or even eliminating the free end of the target part; the target part rotates with the first area toward the side of the rolling gap, and then completes the roll-combination together at the narrowest point of the rolling gap on the Y-axis. The target part continues to rotate with the outer peripheral surface of the first roller, and the outer peripheral surface then moves out of the target range and no longer has adsorption force, which can effectively prevent the target part from adhering to the first roller after roll-combination.

[0010] In one embodiment, the central angle ranges from 75° to 150°.

[0011] In one embodiment, the first pressing roller includes a rotating shaft and a hollow outer cylinder, the rotating shaft passing through the outer cylinder, and the outer cylinder having a plurality of adsorption holes formed on its circumferential outer surface; when a portion of the outer cylinder's outer surface rotates into the target range, the adsorption assembly can generate a vacuum negative pressure in the adsorption holes within the target range. By forming a plurality of adsorption holes on the outer cylinder's circumferential outer surface; when a portion of the outer cylinder's outer surface rotates into the target range, the adsorption assembly can generate a vacuum negative pressure in the adsorption holes within the target range, thereby generating an adsorption force. As a result, once the target part is separated from the conveying assembly, it can be adsorbed and fixed by the first region having the adsorption force, effectively reducing or even eliminating the free ends of the target part and ensuring stable quality after roller pressing and lamination.

[0012] In one embodiment, the adsorption assembly includes a negative pressure member, a sleeve, two end plates, two baffles, and two bearings; the sleeve extends axially along the outer cylinder, and the two ends of the sleeve are fixed to the rotating shaft by two bearings; the two end plates are relatively spaced and distributed at the two ends of the sleeve, and the shape of the first edge of the two end plates away from the sleeve is in contact with the inner wall of the outer cylinder; the two baffles are respectively connected between the second edges extending radially on both sides of the two end plates to jointly form a semi-enclosed space; the negative pressure member connects the semi-enclosed space. By providing the negative pressure member, the air pressure in the semi-enclosed space is lower than the external environment, thereby causing the adsorption hole to generate a vacuum negative pressure, thereby generating an adsorption force, so that once the target part is separated from the conveying assembly, it can be adsorbed and fixed by the first area with adsorption force, effectively reducing or even eliminating the free end of the target part, and ensuring the stable quality after roller pressing and lamination.

[0013] In one embodiment, the electrode processing device further includes a plurality of electric heating elements extending axially along the outer cylinder and spaced circumferentially within the cylinder wall. By arranging the electric heating elements extending axially along the outer cylinder and spaced circumferentially within the cylinder wall, axial temperature differences on the outer circumference of the outer cylinder are effectively eliminated, ensuring temperature consistency across the width of the roller nip zone and preventing wrinkles or deformation of the target component.

[0014] In one embodiment, the conveying assembly includes a first conveyor belt and a second conveyor belt; the output end of the first conveyor belt is adjacent to the input end of the second conveyor belt; the output end of the second conveyor belt conveys the target part to be rolled toward the portion of the outer circumference of the first roller that generates the adsorption force. By providing the first and second conveyor belts, the output end of the first conveyor belt is adjacent to the input end of the second conveyor belt; the output end of the second conveyor belt conveys the target part to be rolled toward the portion of the outer circumference of the first roller that generates the adsorption force, thereby enabling the electrode processing device to adapt to the composite of continuous electrodes, as well as the roll-pressed composite of electrode stacks and diaphragms.

[0015] In one embodiment, the surface of the second conveyor belt has a second adsorption structure; and / or the surface of the first conveyor belt has a first adsorption structure.

[0016] In one embodiment, the axis connecting the second roller and the first roller is defined as the Y-axis. The output end of the second conveyor belt forms an angle B with the Y-axis, with the angle B ranging from 0° to 90°. By adjusting the angular position of the output end of the second conveyor belt with respect to the Y-axis, the output end of the second conveyor belt is ensured to be as close as possible to the first area, thereby preventing free ends of the target parts during transfer.

[0017] In one embodiment, the transmission direction of the output end of the second conveyor belt is arranged tangentially to the outer peripheral surface of the portion of the first roller that generates the adsorption force. By setting the transmission direction of the output end of the second conveyor belt tangentially to the surface of the first region, the target part can be prevented from directly colliding with the surface of the first roller to the greatest extent possible. The target part transitions in a smooth curve, avoiding damage to the target part, and ultimately ensuring stable quality of the electrode sheet after roller-combination by the electrode sheet processing device.

[0018] In one embodiment, the electrode processing device further includes a dust removal mechanism; the dust removal mechanism is attached to the outer circumference of the first pressing roller; and / or the dust removal mechanism is attached to the outer circumference of the second pressing roller. The dust removal mechanism is provided to remove dust and other impurities, thereby preventing dust and other impurities from adhering to the target part, thereby preventing dust and other impurities from affecting the rolling quality or contaminating the target part, thereby ensuring stable quality in subsequent processes.

[0019] In one embodiment, the pole piece processing device further includes an adjustment component, and the adjustment component is configured to adjust the rolling gap.

[0020] In one embodiment, the adjustment assembly includes a support frame, a sliding seat and a driving member; the second pressure roller is rotatably mounted on the lower half of the support frame; the first pressure roller is rotatably connected to the sliding seat, and the sliding seat is slidably mounted on the upper half of the support frame; the driving member drives the sliding seat to drive the first pressure roller to move toward or away from the second pressure roller to adjust the rolling gap.

[0021] A second aspect of an embodiment of the present application provides a battery production line, comprising the above-mentioned electrode processing device.

[0022] The second aspect of the embodiment of the present application provides a production process, which is applied to the above-mentioned electrode processing device, including: controlling the first conveyor belt and the second conveyor belt to transmit at a first speed, so that the target part stored on the first conveyor belt is transferred to the second conveyor belt; confirming that the target part is completely located on the second conveyor belt; controlling the second conveyor belt to transport the target part to the first area at a second speed, so that the first area adsorbs the target part and enters the rolling gap for rolling; the second speed is greater than the first speed.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the principle of a pole piece processing device provided in some embodiments of the present application.

[0025] Figure 2 A schematic structural diagram of a pole piece processing device provided in some embodiments of the present application.

[0026] Figure 3 A top view of a pole piece processing device provided in some embodiments of the present application.

[0027] Figure 4 for Figure 3 The CC cross-sectional view of the pole piece processing device is shown.

[0028] Figure 5 A schematic structural diagram of the first pressure roller provided in some embodiments of the present application.

[0029] Figure 6 A front view of the first pressure roller and the adsorption assembly provided in some embodiments of the present application.

[0030] Figure 7 for Figure 6 EE cross-sectional view of the structure shown.

[0031] Figure 8 for Figure 7 Magnified view of region D of the structure shown.

[0032] Figure 9 A schematic structural diagram of the adsorption assembly provided in some embodiments of the present application.

[0033] Figure 10 Flowchart of the production process provided for some embodiments of the present application.

[0034] Description of reference numerals:

[0035] Rolling gap-80, target part-90, first pressure roller-100, axis-100a, first area-110, rotating shaft-130, outer cylinder-120, adsorption hole-121, second pressure roller-200, conveying assembly-300, first conveyor belt-310, first adsorption structure-311, second conveyor belt-320, second adsorption structure-321, adsorption assembly-400, sleeve-410, end plate-420, first edge-421, second edge-422, baffle-430, semi-enclosed space-450, electric heating part-500, adjustment assembly-600, support frame-630, sliding seat-610, driving part-620. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, if the technical terms "first" and "second" appear, these terms are only used for descriptive purposes to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0041] In the description of the embodiments of this application, if the term "plurality" appears, "plurality" means at least two (including two), for example, two, three, etc., unless otherwise specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" means two or more groups (including two), and if the term "multiple sheets" appears, "multiple sheets" means two or more sheets (including two).

[0042] In the description of the embodiments of the present application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if technical terms such as "installed", "connected", "connected", and "fixed" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0046] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As battery applications continue to expand, market demand is also growing.

[0047] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0048] A battery cell comprises an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet comprises a positive current collector and a positive active material layer, which is coated on the surface of the positive current collector. The positive current collector comprises a positive current collector portion and a positive tab, which is coated with the positive active material layer, while the positive tab is uncoated. For lithium-ion batteries, for example, the positive current collector may be made of aluminum, and the positive active material layer comprises a positive active material, which may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet comprises a negative current collector and a negative active material layer, which is coated on the surface of the negative current collector. The negative current collector comprises a negative current collector portion and a negative tab, which is coated with the negative active material layer, while the negative tab is uncoated. The negative electrode current collector may be made of copper. The negative electrode active material layer includes a negative electrode active material, which may be carbon or silicon. The separator may be made of polypropylene (PP) or polyethylene (PE).

[0049] Overhang, or OH, is the excess length and width of the negative electrode relative to the positive electrode during battery production. The OH is typically designed to be 1-3 mm, primarily to prevent lithium dendrite formation and improve battery safety and cycle life.

[0050] During the electrode assembly manufacturing process, the electrode sheet is fed between two rollers by a vacuum conveyor assembly for rolling and bonding with the separator. However, the conveyor assembly cannot fully penetrate the gap between the two rollers. This results in a long free end between the electrode sheet and the rollers after it leaves the conveyor assembly, making it difficult to control the OH of the electrode assembly and, in turn, leading to unstable rolling quality. The electrode assembly in this case can be either a laminated or wound electrode assembly.

[0051] In order to alleviate the problem of unstable quality of rolling, an adsorption component can be added to the design. The adsorption component provides adsorption force to part of the area of ​​the pressing roller, so that once the target part is separated from the conveying component, it can be adsorbed and fixed by the area with adsorption force in the pressing roller, effectively reducing or even eliminating the free end of the target part, so that the target part can be effectively kept fixed during the entire transfer process before rolling and compounding, reducing the material line fluctuation of the target part, and then effectively controlling the OH size of the electrode assembly, ensuring stable quality after rolling and compounding.

[0052] A first aspect of an embodiment of the present application provides a pole piece processing device. The pole piece processing device disclosed in the embodiment of the present application can roll the target part 90. The target part 90 includes but is not limited to pole pieces, isolation membranes and positive pole pieces, composite parts of isolation membranes and positive pole pieces, and negative pole pieces, etc. To simplify the expression, in the following embodiments, unless otherwise specified, the target parts 90 are all pole pieces.

[0053] Figure 1 A schematic diagram of the principle of a pole piece processing device provided in some embodiments of the present application. Figure 2 A schematic structural diagram of a pole piece processing device provided in some embodiments of the present application. Figure 3 A top view of a pole piece processing device provided in some embodiments of the present application. Figure 4 for Figure 3 The CC cross-sectional view of the pole piece processing device is shown. Figure 5 A schematic structural diagram of the first pressure roller provided in some embodiments of the present application. Figure 6 A front view of the first pressure roller and the adsorption assembly provided in some embodiments of the present application. Figure 7 for Figure 6 EE cross-sectional view of the structure shown. Figure 8 for Figure 7 Magnified view of region D of the structure shown. Figure 9 A schematic structural diagram of the adsorption assembly provided in some embodiments of the present application.

[0054] See Figures 1 to 9 The first aspect of the present application provides a pole piece processing device, which includes a conveying component 300 and a rolling component; the conveying component 300 is used to convey the target part 90 to be rolled; the rolling component includes a first pressing roller 100 and a second pressing roller 200; the second pressing roller 200 is arranged opposite to the first pressing roller 100, and a rolling gap 80 is formed between the second pressing roller 200 and the first pressing roller 100 for the target part 90 to pass through.

[0055] The first pressing roller 100 is configured to rotate around its own axis, and the first pressing roller 100 includes an adsorption component 400 ; the adsorption component 400 is configured to generate adsorption force on a portion of the outer peripheral surface of the first pressing roller 100 .

[0056] In this way, by setting the adsorption component 400, the adsorption component 400 generates an adsorption force on part of the outer peripheral surface of the first pressing roller 100, and the conveying component 300 conveys the target part 90 to be rolled to the rolling component. Once the target part 90 is separated from the conveying component 300, it can be adsorbed and fixed by the part of the outer peripheral surface with adsorption force in the first pressing roller 100, effectively reducing or even eliminating the free end of the target part 90. The target part 90 rotates along with the first pressing roller 100 toward the side close to the rolling gap 80, and then the first pressing roller 100 and the second pressing roller 200 jointly complete the rolling compounding; since the target part 90 can be effectively kept fixed during the entire transfer process before rolling compounding, the material line fluctuation of the target part 90 can be effectively reduced, and the OH size of the electrode assembly can be effectively controlled to ensure the stable quality after rolling compounding.

[0057] In some possible embodiments, see Figures 1 to 9 As shown, when a portion of the outer circumference of the first pressing roller 100 rotates about its own axis 100a to within the target range, this portion of the outer circumference is defined as the first region 110. The adsorption assembly 400 is configured to generate an adsorption force in the first region 110. The conveying assembly 300 is used to convey the target workpiece 90 to be rolled to the first region 110.

[0058] The target range refers to a sector-shaped range formed by sweeping the central angle A in a direction approaching the conveying assembly 300 with the axis of the first pressing roller 100 as the coordinate origin O and the diameter passing through the coordinate origin O as the starting edge.

[0059] It should be noted that when a portion of the outer circumference of the first pressure roller 100 rotates about its axis 100a to within the target range, this portion of the outer circumference is defined as the first region 110, and the adsorption assembly 400 generates adsorption force on this portion of the outer circumference, which can be used to adsorb the target part 90. When this portion of the outer circumference continues to rotate until it reaches outside the target range, it no longer has adsorption force and is no longer defined as the first region 110. Furthermore, the first pressure roller 100 has an overall cylindrical structure. During its rotation about its axis 100a, a portion of its outer circumference always remains within the target range, serving as the first region 110.

[0060] By setting up the adsorption component 400, the adsorption component 400 generates an adsorption force on the partial outer surface of the first pressing roller 100 that is within the target range when it rotates, and the conveying component 300 conveys the target part 90 to be rolled to the first area 110, so that once the target part 90 is separated from the conveying component 300, it can be adsorbed and fixed by the first area 110 with adsorption force, effectively reducing or even eliminating the free end of the target part 90, and the target part 90 rotates along with the first area 110 toward the side close to the rolling gap 80, and then the first pressing roller 100 and the second pressing roller 200 jointly complete the rolling compounding; since the target part 90 can be effectively kept fixed during the entire transfer process before rolling compounding, the material line fluctuation of the target part 90 can be effectively reduced, and the OH size of the electrode assembly can be effectively controlled to ensure the stable quality after rolling compounding.

[0061] In the embodiment of this application, combined with Figure 1 and Figure 4 As shown, the target range is defined in the cross section of the first pressing roller 100 .

[0062] In some possible embodiments, the electrode processing device includes a first driving unit (not shown), which is connected to the first pressing roller 100 and is configured to drive the first pressing roller to rotate.

[0063] The first driving unit refers to a driving structure for driving the first pressing roller 100 to rotate. By providing the first driving unit to drive the first pressing roller 100 to rotate, it is convenient to drive the first pressing roller 100 to press the target part 90.

[0064] The first drive unit can be a rotary drive element that outputs rotational motion to drive the first pressure roller 100. The first drive unit can also include a linear drive element and a transmission mechanism. The linear drive element outputs linear motion, which is then converted by the transmission mechanism into rotational motion, thereby driving the first pressure roller 100. Linear drive elements include, but are not limited to, pneumatic cylinders, electric cylinders, and hydraulic cylinders. The transmission mechanism can be a slider-crank mechanism, a cam mechanism, or the like.

[0065] In some possible embodiments, the electrode processing device includes a second driving unit (not shown), which is connected to the second pressing roller 200 and is configured to drive the second pressing roller 200 to rotate.

[0066] The second driving unit refers to a driving structure for driving the second pressing roller 200 to rotate. By providing the second driving unit to drive the second pressing roller 200 to rotate, it is convenient to drive the second pressing roller 200 to press the target part 90.

[0067] The second drive unit can be a rotary drive member that outputs rotational motion to drive the second pressure roller 200. The second drive unit can also include a linear drive member and a transmission mechanism. The linear drive member outputs linear motion, which is then converted by the transmission mechanism into rotational motion, thereby driving the second pressure roller 200. Linear drive members include, but are not limited to, pneumatic cylinders, electric cylinders, and hydraulic cylinders. The transmission mechanism can be a slider-crank mechanism, a cam mechanism, or the like.

[0068] In some possible embodiments, see Figures 1 to 9 As shown, the axis connecting the second pressing roller 200 and the first pressing roller 100 is the Y axis.

[0069] The target range refers to a sector-shaped range formed by sweeping the central angle A in a direction approaching the conveying assembly 300 with the axis of the first pressing roller 100 as the coordinate origin O and the Y axis as the starting edge.

[0070] Specifically, combined Figure 1 、 Figure 2 and Figure 4 In the illustrated orientation, the conveyor assembly 300 is located to the left of the Y-axis. The first roller 100 rotates counterclockwise around its axis, while the second roller 200 rotates clockwise around its axis. The target range is defined as the sector-shaped range formed by sweeping the central angle A in a clockwise direction, with the axis of the first roller 100 as the coordinate origin O and the Y-axis as the starting edge. Correspondingly, if the conveyor assembly 300 is located on the other side of the Y-axis, the rotation direction of the first and second rollers 100, as well as the sweep direction of the central angle A, can be adaptively adjusted, which will not be further described here.

[0071] In the embodiment of the present application, a rolling gap 80 is formed between the first pressing roller 100 and the second pressing roller 200. The width of the rolling gap 80 is narrowest at the Y-axis connecting the axes of the second pressing roller 200 and the first pressing roller 100. It can be confirmed that the target part 90 completes the rolling compounding at this location.

[0072] Therefore, by setting the target range to the fan-shaped range formed by sweeping the central angle A in the direction close to the conveying component 300 with the axis center of the first pressure roller 100 as the coordinate origin O and the Y-axis as the starting edge; once the target part 90 leaves the conveying component 300, it can be adsorbed and fixed by the first area 110 with adsorption force, effectively reducing or even eliminating the free end of the target part 90; the target part 90 rotates along with the first area 110 toward the side close to the rolling gap 80, and then completes the rolling compounding together at the narrowest part of the rolling gap 90 on the Y-axis, and the target part 90 continues to rotate along with the outer peripheral surface of the first pressure roller 100, and the outer peripheral surface then moves out of the target range and no longer has adsorption force, which can effectively avoid the target part 90 90 that has been roll-compounded from adhering to the first pressure roller 100.

[0073] In some possible embodiments, see Figures 1 to 9 As shown, the central angle A ranges from 75° to 150°.

[0074] The size of the central angle A can be specifically 75°, 85°, 90°, 95°100°, 115°135°, 145° or 150°, which is not limited in the embodiments of the present application.

[0075] The central angle A should not be too large. A too large central angle will cause the target range to increase, which will in turn cause the total area of ​​the first region 110 to be too large and the adsorption capacity per unit area of ​​the first region 110 to be reduced, ultimately causing the first region 110 to be unable to stably adsorb the target part 90.

[0076] The central angle A should not be too small. A too small central angle A will result in the conveying assembly 300 being unable to approach the first area 110 at a suitable angle, thereby causing a free end of the target part 90 during the transfer process.

[0077] By limiting the angle range of the central angle A to 75°~150°, the target range area is controlled, and the partial outer peripheral surface of the first pressing roller 100 can be effectively controlled to generate sufficient and stable adsorption force, so that the conveying component 300 can convey the target part 90 to be rolled to the first area 110, so as to ensure that the target part 90 is adsorbed and fixed by the first area 110 with adsorption force after it leaves the conveying component 300, thereby effectively reducing or even eliminating the free end of the target part 90, thereby reducing the material line fluctuation of the target part 90, and then effectively controlling the OH size of the electrode assembly, and ensuring the stable quality after rolling and compounding.

[0078] In some possible embodiments, see Figures 1 to 9As shown, the first pressure roller 100 includes a rotating shaft 130 and a hollow outer cylinder 120. The rotating shaft 130 is disposed through the outer cylinder 120. The outer cylinder 120 has a plurality of suction holes 121 formed on its outer circumference. When a portion of the outer circumference of the outer cylinder 120 rotates to within a target range, the suction assembly 400 can generate a vacuum negative pressure in the suction holes 121 within the target range.

[0079] It is understood that the axis 100a of the first pressure roller 100 coincides with the axes of the outer cylinder 120 and the rotating shaft 130. The circumferential, axial, and radial directions of the first pressure roller 100 are also the circumferential, axial, and radial directions of the outer cylinder 120, as well as the circumferential, axial, and radial directions of the rotating shaft 130. In the various embodiments of this application, unless otherwise specified, the circumferential, axial, and radial directions all refer to the circumferential, axial, and radial directions of the first pressure roller 100.

[0080] The rotating shaft 130 is disposed through the outer cylinder 120. A first drive unit is provided to drive the rotating shaft 130 to rotate, thereby driving the outer cylinder 120 to roll the target part 90. Specifically, the rotating shaft 130 can be cylindrical and made of carbon steel or stainless steel. The outer cylinder 120 is a hollow cylindrical structure made of carbon steel or stainless steel.

[0081] The outer surface of the outer cylinder 120 has a plurality of adsorption holes 121. The adsorption holes 121 can extend radially and penetrate the cylinder wall of the outer cylinder 120, so that the adsorption holes 121 can connect the ambient air pressure outside the cylinder with that inside the cylinder.

[0082] A plurality of adsorption holes 121 are formed on the outer peripheral surface of the outer cylinder 120 along the circumferential direction; when part of the outer peripheral surface of the outer cylinder 120 rotates to the target range, the adsorption component 400 can generate a vacuum negative pressure in the adsorption holes 121 on the part of the outer peripheral surface of the outer cylinder 120 located within the target range, thereby generating an adsorption force, so that once the target part 90 is separated from the conveying component 300, it can be adsorbed and fixed by the first area 110 with adsorption force, effectively reducing or even eliminating the free end of the target part 90, and the target part 90 rotates along the first area 110 toward the side close to the rolling gap 80, and then the first pressing roller 100 and the second pressing roller 200 jointly complete the rolling compounding; since the target part 90 can be effectively kept fixed during the entire transfer process before rolling compounding, the material line fluctuation of the target part 90 can be effectively reduced, thereby effectively controlling the OH size of the electrode assembly, and ensuring the stable quality after rolling compounding.

[0083] In some possible embodiments, see Figures 1 to 9 As shown, the adsorption assembly 400 includes a negative pressure member (not labeled), a sleeve 410 , two end plates 420 , two baffles 430 , and two bearings (not labeled).

[0084] The sleeve 410 extends axially along the outer cylinder 120. Its two ends are fixed to the rotating shaft 130 via two bearings. Two end plates 420 are spaced apart at opposite ends of the sleeve 410. The first edges 421 of the end plates 420, facing away from the sleeve 410, are shaped to conform to the inner wall of the outer cylinder 120. Two baffles 430 are connected between the radially extending second edges 422 of the end plates 420, forming a semi-enclosed space 450. A negative pressure element is connected to the semi-enclosed space 450.

[0085] When a portion of the outer circumference of the outer cylinder 120 rotates to within the target range, the adsorption holes 121 corresponding to the opening area of ​​the semi-enclosed space 450 generate adsorption force.

[0086] Specifically, the two ends of the sleeve 410 can be rotatably fixed on the rotating shaft 130 through two bearings respectively, and the two end plates 420 are distributed at both ends of the sleeve 410 at relative intervals along the axial direction of the outer cylinder 120; the two baffles 430 extend outward in the radial direction of the outer cylinder 120 and are respectively connected between the second edges 422 extending radially on both sides of the two end plates 420 to jointly form a semi-enclosed space 450.

[0087] When the first driving unit drives the rotating shaft 130 to rotate, thereby driving the outer cylinder 120 to rotate clockwise or counterclockwise, the sleeve 410 as a whole remains stationary, thereby making the end plate 420 and the baffle 430 connected to the sleeve 410 remain stationary, ultimately ensuring that the semi-enclosed space 450 does not change position with the rotation of the rotating shaft 130.

[0088] The negative pressure part is connected to the semi-enclosed space 450 through a pipeline, so that the air pressure in the semi-enclosed space 450 is lower than the external environment, thereby causing the adsorption hole 121 to generate a vacuum negative pressure, thereby generating an adsorption force, so that once the target part 90 is separated from the conveying component 300, it can be adsorbed and fixed by the first area 110 with adsorption force, effectively reducing or even eliminating the free end of the target part 90, and the target part 90 rotates toward the side close to the rolling gap 80 along with the first area 110, and then the first pressing roller 100 and the second pressing roller 200 jointly complete the rolling compounding; since the target part 90 can be effectively kept fixed during the entire transfer process before rolling compounding, the material line fluctuation of the target part 90 can be effectively reduced, thereby effectively controlling the OH size of the electrode assembly, and ensuring the stable quality after rolling compounding.

[0089] It should be noted that the opening of the semi-enclosed space 450 should fit with the inner wall of the outer cylinder 120 to reduce the gap between the two; specifically, the shape of the first edge 421 of the two end plates 420 away from the sleeve 410 fits with the inner wall of the outer cylinder 120; the end plate 420 as a whole can be a fan-shaped plate or an arc-shaped plate, and the angle between the plate surfaces of the two baffles 430 is the central angle A; in this way, the cross-section of the semi-enclosed space 450 can be fan-shaped, so that the semi-enclosed space 450 can only be connected to the external environment through the adsorption hole 121 on the outer cylinder 120.

[0090] Optionally, the negative pressure member may be a negative pressure pump.

[0091] Optionally, the sleeve 410, the end plate 420 and the baffle 430 may be made of stainless steel, aluminum alloy or carbon steel, and the various parts may be fixed by bolts or welding.

[0092] Optionally, the sleeve 410 , the end plate 420 and the baffle 430 may be integrally formed of plastic.

[0093] In some possible embodiments, see Figures 2 to 4 As shown, the electrode processing device further includes a plurality of electric heating elements 500 , which extend along the axial direction of the outer cylinder 120 and are arranged in the cylinder wall of the outer cylinder 120 at intervals along the circumferential direction.

[0094] By arranging the electric heating element 500 to extend along the axial direction of the outer cylinder 120 and being arranged at intervals along the circumferential direction in the cylinder wall of the outer cylinder 120, the axial temperature difference on the outer circumferential surface of the outer cylinder 120 is effectively eliminated, the temperature consistency of the rolling zone in the width direction is ensured, and the target part 90 is prevented from wrinkling or deformation.

[0095] Optionally, the electric heating element 500 may be a resistance heating wire or a ceramic electric heating rod.

[0096] Optionally, five electric heating elements 500 may be arranged circumferentially and spaced apart within the wall of the outer cylinder 120. The provision of the electric heating elements 500 provides the electrode processing device with a temperature regulation function, capable of adjusting the temperature between 0° and 200°, thereby improving the roll-combination quality of the target component 90.

[0097] Optionally, the length of the electric heating element 500 along the axial direction of the outer cylinder 120 should be equal to the length of the outer cylinder 120 along its axial direction, so as to avoid local heating in the outer cylinder 120 resulting in uneven heating and cooling in the edge area.

[0098] In some possible embodiments, see Figures 1 to 9As shown, the conveyor assembly 300 includes a first conveyor belt 310 and a second conveyor belt 320. The output end of the first conveyor belt 310 is adjacent to the input end of the second conveyor belt 320. The output end of the second conveyor belt 320 conveys the target workpiece 90 to be rolled toward the portion of the outer circumference of the first roller 100 that generates the suction force. In other words, the output end of the second conveyor belt 320 conveys the target workpiece 90 to be rolled toward the first area 110.

[0099] By setting a first conveyor belt 310 and a second conveyor belt 320, the output end of the first conveyor belt 310 is adjacent to the input end of the second conveyor belt 320; the output end of the second conveyor belt 320 conveys the target part 90 to be rolled to the part of the outer peripheral surface that generates adsorption force in the first pressing roller 100, that is, the first area 110; so that the electrode processing device can adapt to the composite of continuous electrodes, and can also adapt to the rolling composite of electrode stacks and diaphragms, the specific design shall prevail.

[0100] By rolling the electrode stack and the diaphragm together, the first conveyor belt 310 can be used to store the target parts 90 to be rolled, and the second conveyor belt 320 is used to convey the target parts 90 to be rolled to the first area 110, ensuring that the first pressing roller 100 and the second pressing roller 200 can continuously complete the rolling of multiple target parts 90, prevent material breakage, and effectively improve the unit time production capacity of the electrode processing device.

[0101] In some possible embodiments, see Figures 1 to 9 As shown, the transmission speeds of the first conveyor belt 310 and the second conveyor belt 320 can be adjusted. Specifically, the first conveyor belt 310 and the second conveyor belt 320 can be kept at a first transmission speed so that the target parts 90 stored on the first conveyor belt 310 are transferred to the second conveyor belt 320;

[0102] When it is confirmed that the target part 90 is completely located on the second conveyor belt 320 , the first conveyor belt 310 may temporarily suspend or stop feeding the second conveyor belt 320 .

[0103] When the second conveyor belt 320 delivers material to the first area 110, it accelerates to the second speed, aligning the conveying speed of the target part 90 with the winding speed of the first roller 100. That is, the linear speed of the winding of the first roller 100 is equal to the second speed. This prevents the target part 90 from slipping on the first area 110 and effectively increases the rolling speed of the first and second rollers 100 and 200, thereby improving the production efficiency of the electrode processing apparatus.

[0104] In some possible embodiments, see Figures 1 to 9As shown, the surface of the first conveyor belt 310 has a first adsorption structure 311. The first adsorption structure 311 can adsorb the target part 90, so that the target part 90 is stably transported along the first conveyor belt 310, and the stable storage and rapid release of the target part 90 are ensured.

[0105] The first adsorption structure 311 can be a vacuum negative pressure hole, a vacuum negative pressure groove, a vacuum negative pressure suction cup, etc.

[0106] In some possible embodiments, see Figures 1 to 9 As shown, the surface of the second conveyor belt 320 has a second adsorption structure 321; the second adsorption structure 321 can adsorb the target part 90, so that the target part 90 is stably transported along the second conveyor belt 320, and ensures stable storage and rapid release of the target part 90; when the target part 90 is separated from the surface of the second conveyor belt 320, it can be adsorbed and fixed by the first area 110 with adsorption force.

[0107] The second adsorption structure 321 can be a vacuum negative pressure hole, a vacuum negative pressure groove, a vacuum negative pressure suction cup, etc.

[0108] In some possible embodiments, see Figures 1 to 9 As shown, the axis connecting the second pressing roller 200 and the first pressing roller 100 is the Y axis; the output end of the second conveyor belt 320 has an angle B with the Y axis, and the angle range of the angle B is 0°~90°.

[0109] By adjusting the angular position between the output end of the second conveyor belt 320 and the Y axis, the output end of the second conveyor belt 320 is ensured to be as close as possible to the first area 110 , thereby preventing the target part 90 from having a free end during the transfer process.

[0110] In some possible embodiments, combined with Figure 1 As shown, the transport direction of the output end of the second conveyor belt 320 is arranged tangentially to the surface of the first area 110 .

[0111] The first area 110 is a portion of the outer tube 120 and has an overall curved surface.

[0112] When the target part 90 detaches from the output end of the second conveyor belt 320, it can be adsorbed and fixed by the first area 110 with adsorption force; and since the transmission direction of the output end of the second conveyor belt 320 is set tangent to the surface of the first area 110, it can prevent the target part 90 from directly colliding with the surface of the first pressure roller 100 to the greatest extent. The target part 90 achieves transition with a smooth curve, avoiding damage to the target part 90, and ultimately ensuring the stability of the quality of the electrode after roller-combining by the electrode processing device.

[0113] In some possible embodiments, the electrode processing device further includes a dust removal mechanism (not shown) which is attached to the circumference of the first pressing roller 100 and / or the second pressing roller 200 to remove dust from the first pressing roller 100 and / or the second pressing roller 200 .

[0114] That is, the dust removal mechanism can be attached to the outer peripheral surface of the first pressure roller 100; the dust removal mechanism can also be attached to the outer peripheral surface of the second pressure roller 200; the dust removal mechanism can be attached to the outer peripheral surfaces of the first pressure roller 100 and the second pressure roller 200 at the same time.

[0115] By setting up a dust removal mechanism to remove dust from the first pressing roller 100 and / or the second pressing roller 200, dust and other impurities on the first pressing roller 100 and / or the second pressing roller 200 are prevented from adhering to the target part 90, thereby avoiding dust and other impurities affecting the rolling quality or dirtying the target part 90, ensuring the stable quality of subsequent processes.

[0116] In some possible embodiments, the dust removal mechanism may be a dust removal brush. The dust removal brush is positioned on the output side of the target component 90 and is in contact with the circumference of the first pressure roller 100 and / or the second pressure roller 200. In other possible embodiments, the dust removal mechanism may be a dust removal rubber roller that is in contact with the first pressure roller 100 and / or the second pressure roller 200 to adhere dust from the first pressure roller 100 and / or the second pressure roller 200 to the dust removal rubber roller. The specific design is subject to change and is not limited in this application.

[0117] In some possible embodiments, the pole piece processing device further includes an adjustment component 600 , and the adjustment component 600 is configured to adjust the rolling gap 80 .

[0118] Specifically, the adjustment assembly 600 includes a support frame 630, a sliding seat 610 and a driving member 620; the second pressure roller 200 is rotatably mounted on the lower half of the support frame 630; the first pressure roller 100 is rotatably connected to the sliding seat 610, and the sliding seat 610 is slidably mounted on the upper half of the support frame 630; the driving member 620 drives the sliding seat 610 to drive the first pressure roller 100 to move toward or away from the second pressure roller 200 to adjust the rolling gap 80.

[0119] Different target parts 90 often have different rolling thicknesses, so the adjustment component 600 is required to adjust the rolling gap 80 to ensure the quality of the rolling compound.

[0120] Among them, the sliding seat 610 is connected to the driving assembly, and the support frame 630 has a guide rail (not marked) in the vertical direction. The sliding seat 610 slides up and down on the guide rail, thereby driving the first pressing roller 100 to approach or move away from the second pressing roller 200, and finally adjusting the rolling gap 80 until it reaches the appropriate width, ensuring that the pole piece processing device has good rolling quality for the target part 90.

[0121] The driving member 620 may be a motor or a cylinder.

[0122] In some possible embodiments, the electrode processing device further includes a control system (not shown), which can be used to coordinate the actions of various mechanisms to achieve intelligent and automated production.

[0123] For example, the control system can control the connection between the first conveyor belt 310, the second conveyor belt 320, the first pressure roller 100 and the second pressure roller 200, thereby controlling the transmission speed of the first conveyor belt 310 and the second conveyor belt 320, and controlling the rolling speed of the first pressure roller 100 and the second pressure roller 200 to achieve speed matching control.

[0124] The control system may control the connecting driving member 620 to adjust the width of the rolling gap 80 according to the thickness of the target part 90 .

[0125] The control system can control the connection of the electric heating element 500 and adjust the temperature of the electric heating element 500 by the control system so that the temperature of the first pressing roller 100 can be adjusted between 0° and 200°, thereby improving the rolling composite quality of the target part 90.

[0126] A second aspect of an embodiment of the present application provides a battery production line, comprising the above-mentioned electrode processing device.

[0127] By setting the adsorption component 400, an adsorption force is generated on the partial outer surface of the first pressing roller 100 that rotates to the target range, and the conveying component 300 conveys the target part 90 to be rolled to the first area 110, so that once the target part 90 leaves the conveying component 300, it can be adsorbed and fixed by the first area 110 with adsorption force, effectively reducing or even eliminating the free end of the target part 90, and the target part 90 rotates along the first area 110 toward the side close to the rolling gap 80, and then the first pressing roller 100 and the second pressing roller 200 jointly complete the rolling compounding; since the target part 90 can be effectively kept fixed during the entire transfer process before rolling compounding, the material line fluctuation of the target part 90 can be effectively reduced, and the OH size of the electrode assembly can be effectively controlled, thereby ensuring the stable quality after rolling compounding, and ultimately improving the production efficiency of the battery production line.

[0128] The third aspect of the embodiment of the present application provides a production process, which is applied to the above-mentioned electrode processing device, referring to Figures 1 to 10 As shown, the production process includes:

[0129] S10: Control the first conveyor belt 310 and the second conveyor belt 320 to move at a first speed so that the target part 90 stored on the first conveyor belt 310 is transferred to the second conveyor belt 320. The first conveyor belt 310 is used to store laminated sheets. When the target part 90 is stored on the first conveyor belt 310, the first suction structure 311 fixes the position of the target part 90. When feeding is required, the target part 90 is transferred to the second conveyor belt 320. At this time, the first conveyor belt 310 and the second conveyor belt 320 both move at the first speed to ensure the stability of the transfer of the target part 90.

[0130] S20: Confirm that the target part 90 is completely located on the second conveyor belt 320. The confirmation method can be through a CCD camera or a sensor.

[0131] S30, controlling the second conveyor belt 320 to convey the target part 90 to the first area 110 at a second speed, so that the first area 110 adsorbs the target part 90 and enters the rolling gap 80 for rolling; the second speed is greater than the first speed.

[0132] As the target part 90 is fully transferred to the surface of the second conveyor belt 320, the second conveyor belt 320 begins to accelerate, causing the target part 90 to reach a linear velocity that matches the first roller 100, i.e., the second velocity, as it leaves the output end of the second conveyor belt 320. Once the target part 90 leaves the output end of the second conveyor belt 320, it is held in place by the adsorbent first region 110. The control system then controls the connected drive member 620 to adjust the width of the rolling gap 80 based on the thickness of the target part 90, ensuring that the target part 90 does not shift or become damaged during the rolling and laminating process.

[0133] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A pole piece processing device, characterized in that: The electrode processing device includes: A conveying assembly (300) for conveying a target piece (90) to be rolled; A rolling assembly comprises a first pressing roller (100) and a second pressing roller (200); the second pressing roller (200) is arranged opposite to the first pressing roller (100), and a rolling gap (80) is formed between the second pressing roller (200) and the first pressing roller (100) for the target part (90) to pass through; Wherein, the first pressing roller (100) is configured to be rotatable around its own axis, and the first pressing roller (100) comprises an adsorption component (400); The adsorption component (400) is configured to generate adsorption force on a portion of the outer peripheral surface of the first pressing roller (100); When a portion of the outer circumference of the first pressing roller (100) rotates around its own axis to within a target range, the portion of the outer circumference is defined as a first area (110); the adsorption component (400) is configured to enable the first area (110) to generate an adsorption force; The conveying assembly (300) is used to convey the target piece (90) to be rolled to the first area (110); The target range refers to a sector-shaped range formed by sweeping the central angle A in a direction approaching the conveying component (300) with the axis of the first pressing roller (100) as the coordinate origin O and the axis passing through the coordinate origin O as the starting edge; The first pressing roller (100) comprises a rotating shaft (130) and a hollow outer cylinder (120), wherein the rotating shaft (130) is passed through the outer cylinder (120), and a plurality of adsorption holes (121) are formed on the outer surface of the outer cylinder (120) along the circumferential direction; When part of the outer circumference of the outer cylinder (120) rotates to within the target range, the adsorption assembly (400) can generate a vacuum negative pressure in the adsorption holes (121) located within the target range.

2. The electrode processing device according to claim 1, characterized in that: The axis connecting the second pressing roller (200) and the first pressing roller (100) is the Y axis; The target range refers to a sector-shaped range formed by sweeping the central angle A in a direction approaching the conveying component (300) with the axis of the first pressing roller (100) as the coordinate origin O and the Y axis as the starting edge.

3. The electrode processing device according to claim 1, characterized in that: The central angle A ranges from 75° to 150°.

4. The electrode processing device according to claim 1, characterized in that: The adsorption assembly (400) comprises a negative pressure piece, a sleeve (410), two end plates (420), two baffles (430), and two bearings; The sleeve (410) extends along the axial direction of the outer cylinder (120), and both ends of the sleeve (410) are fixed to the rotating shaft (130) via two bearings respectively; The two end plates (420) are spaced apart and distributed at both ends of the sleeve (410), and the shapes of the first edges (421) of the two end plates (420) away from the sleeve (410) are in contact with the inner wall of the outer cylinder (120); The two baffles (430) are respectively connected between the second edges (422) extending radially on both sides of the two end plates (420) to jointly form a semi-enclosed space (450); The negative pressure member is connected to the semi-enclosed space (450).

5. The electrode processing device according to claim 1, characterized in that: The electrode processing device further comprises a plurality of electric heating elements (500), the electric heating elements (500) extending along the axial direction of the outer cylinder (120) and being arranged at intervals along the circumferential direction within the cylinder wall of the outer cylinder (120).

6. The electrode processing device according to any one of claims 1 to 3, characterized in that: The conveying assembly (300) comprises a first conveyor belt (310) and a second conveyor belt (320); the output end of the first conveyor belt (310) is adjacent to the input end of the second conveyor belt (320); The output end of the second conveyor belt (320) conveys the target part (90) to be rolled to the portion of the outer peripheral surface of the first pressing roller (100) that generates the adsorption force.

7. The electrode processing device according to claim 6, characterized in that: The surface of the second conveyor belt (320) has a second adsorption structure (321); and / or, The surface of the first conveyor belt (310) has a first adsorption structure (311).

8. The electrode processing device according to claim 7, characterized in that: The connecting line between the axes of the second pressing roller (200) and the first pressing roller (100) is taken as the Y axis; An angle B is formed between the output end of the second conveyor belt (320) and the Y axis, and the angle range of the angle B is 0° to 90°.

9. The electrode processing device according to claim 6, characterized in that: The transmission direction of the output end of the second conveyor belt (320) is arranged tangentially to the outer peripheral surface of the portion of the first pressing roller (100) that generates the adsorption force.

10. The electrode processing device according to any one of claims 1 to 3, characterized in that: The electrode processing device also includes a dust removal mechanism; The dust removal mechanism is attached to the outer peripheral surface of the first pressing roller (100); and / or, The dust removal mechanism is attached to the outer peripheral surface of the second pressing roller (200).

11. The electrode processing device according to any one of claims 1 to 3, characterized in that: The pole piece processing device further comprises an adjustment component (600), wherein the adjustment component (600) is configured to adjust the rolling gap (80).

12. The electrode processing device according to claim 11, characterized in that: The adjustment assembly (600) comprises a support frame (630), a sliding seat (610) and a driving member (620); The second pressing roller (200) is rotatably mounted on the lower half of the support frame (630); The first pressing roller (100) is rotatably connected to the sliding seat (610), and the sliding seat (610) is slidably mounted on the upper half of the support frame (630); The driving member (620) drives the sliding seat (610) to drive the first pressing roller (100) to move toward or away from the second pressing roller (200) to adjust the roller pressing gap (80).

13. A battery production line, characterized in that: It comprises a pole piece processing device as described in any one of claims 1 to 12.

14. A production process, applied to the electrode processing device according to claim 6, characterized in that: include: Controlling the first conveyor belt (310) and the second conveyor belt (320) to transmit at a first speed so that the target part (90) stored on the first conveyor belt (310) is transferred to the second conveyor belt (320); confirming that the target part (90) is completely located on the second conveyor belt (320); The second conveyor belt (320) is controlled to convey the target part (90) to the first area (110) at a second speed, so that the first area (110) absorbs the target part (90) and enters the rolling gap (80) for rolling; the second speed is greater than the first speed.

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