Conveying device and pole piece processing equipment

Abstract

The embodiment of the utility model provides a transmission device and pole piece processing equipment, the transmission device comprises a transmission roller and an air blowing mechanism, and the transmission roller is used for abutting against an active material layer when a pole piece is conveyed. The air blowing mechanism comprises an air outlet head, and the air outlet head is located on the side, facing the conveying rollers, of the second area and used for blowing air to the second area. The transmission roller can transmit a pole piece, the transmission roller is in contact with an active material layer located in a first area on the base material, and a second area without the active material layer and the transmission roller are arranged at an interval; the air outlet head of the air blowing mechanism can blow air to the second area so as to keep the second area away from the conveying roller, the risk that the second area collapses towards the conveying roller is reduced, and therefore the risk that the base material wrinkles in the conveying process is reduced, and the machining quality of the pole piece is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pole piece processing, and in particular to a transmission device and pole piece processing equipment. Background Art

[0002] During the production process of the battery pole piece, it is necessary to coat the active material layer on both sides of the substrate along its thickness direction and dry it to produce the pole piece.

[0003] After the active material layer is coated on one side of the substrate along the thickness direction and dried, it is necessary to coat the active material layer on the other side of the substrate along the thickness direction and transfer the substrate to a drying mechanism for drying.

[0004] During the transmission of the pole piece, since some positions of the substrate are not coated with the active material layer, the area of ​​the substrate not coated with the active material layer is prone to collapse and wrinkle, affecting the processing quality of the pole piece. Summary of the invention

[0005] The embodiments of the present application provide a transmission device and a pole piece processing equipment to improve the processing quality of the pole piece.

[0006] In a first aspect, an embodiment of the present application provides a transmission device, which is used to transmit an electrode, wherein the electrode includes a substrate and an active material layer, the substrate has a first area on which the active material layer is provided and a second area on which the active material layer is not provided, and the first area and the second area are arranged along the width direction of the electrode, the transmission device includes a transmission roller and a blower mechanism, the transmission roller is used to abut the active material layer when conveying the electrode; the blower mechanism includes an air outlet, the air outlet is located on a side of the second area facing the transmission roller, and the air outlet is used to blow air toward the second area.

[0007] In the above technical solution, the transmission roller can transmit the pole piece, and the transmission roller contacts the active material layer located in the first area on the substrate. The air outlet of the air blowing mechanism can blow air to the second area, reducing the risk of the second area collapsing onto the transmission roller, thereby reducing the risk of wrinkles in the substrate during transmission and improving the processing quality of the pole piece.

[0008] In some embodiments, the transmission device further comprises a mounting frame, the transmission roller is rotatably arranged on the mounting frame around its own axis, and the air outlet head is movably arranged on the mounting frame along the width direction of the pole piece. By arranging the transmission roller on the mounting frame, the mounting frame can limit the position of the transmission roller, the air outlet head is arranged on the mounting frame, and the air outlet head can be arranged close to the transmission roller. When the air outlet head blows air to the pole piece on the transmission roller, the air outlet head blows the second area, which can drive the second area away from the transmission roller, reducing the risk of the second area being damaged by being placed on the transmission roller. The air outlet head is movably arranged on the mounting frame along the width direction of the pole piece. When the position of the second area of ​​the transmission roller along the width direction of the pole piece changes, the position of the air outlet head can be adjusted so that the air outlet head can blow air to the second area of ​​the substrate.

[0009] In some embodiments, along the conveying direction of the pole piece, both sides of the transmission roller are provided with air outlets, and the conveying direction of the pole piece is perpendicular to the width direction of the pole piece. By providing air outlets on both sides of the transmission roller, the air outlets on both sides of the transmission roller can blow air to the second area, so that the second area between the two air outlets is away from the transmission roller, thereby reducing the risk of the second area collapsing toward the transmission roller, thereby reducing the risk of wrinkles on the substrate, and improving the processing quality of the pole piece.

[0010] In some embodiments, the substrate includes two second regions, and along the width direction of the pole piece, the first region is located between the two second regions, and at least one air outlet is correspondingly arranged in each second region. By arranging at least one air outlet in each second region, each second region has an air outlet blowing air thereto, so as to reduce the risk of each second region collapsing toward the transmission roller, thereby reducing the risk of wrinkles of the substrate and improving the processing quality of the pole piece.

[0011] In some embodiments, the air outlet has an air outlet facing the second area, and the air outlet is provided with an adjustment mechanism, which is configured to adjust the size of the air outlet. By adjusting the size of the air outlet, the air volume of the air outlet can be adjusted to adjust the wind force of the air outlet blowing toward the second area.

[0012] In some embodiments, the adjustment mechanism includes an adjustment plate, which is adjustably disposed on the air outlet to adjust the area of ​​the air outlet covered by the adjustment plate. By adjustably disposing the adjustment plate on the air outlet, the adjustment plate can adjust the air outlet area of ​​the air outlet, thereby adjusting the size of the air outlet, adjusting the air volume of the air outlet, and also adjusting the air outlet position of the air outlet.

[0013] In some embodiments, the adjustment plate is adjustably disposed on the air outlet along the width direction of the pole piece. By adjusting the adjustment plate to be adjustably disposed on the air outlet along the width direction of the pole piece, the air outlet size of the air outlet can be adjusted when the air outlet blows air to the second area of ​​different widths, so that the air outlet can blow air to the second area accordingly, thereby improving the supporting effect of the wind force on the second area and reducing the risk of blowing off the active material layer by the air outlet blowing air to the active material layer located in the first area.

[0014] In some embodiments, each air outlet is provided with a plurality of adjustment plates, and the plurality of adjustment plates are arranged along the width direction of the pole piece. By providing a plurality of adjustment plates, the weight of a single adjustment plate is reduced, and the position of the adjustment plate is adjusted to facilitate adjustment of the air volume and the air outlet position of the air outlet.

[0015] In some embodiments, the transmission device further includes a locking member, which has a locked state and an unlocked state, and the locking member is configured to: lock the adjustment plate and the air outlet in the locked state; and allow the adjustment plate to move relative to the air outlet along the width direction of the pole piece in the unlocked state to adjust the area of ​​the air outlet covered by the adjustment plate. By switching the locking member to the locked state, the locking member can lock the adjustment plate and the air outlet to fix the size of the air outlet; by switching the locking member to the unlocked state, the position of the adjustment plate can be adjusted to adjust the size of the air outlet.

[0016] In some embodiments, an air outlet channel is formed inside the air outlet head, one end of the air outlet channel forms an air inlet, and the other end forms an air outlet facing the second area, and a flow equalizer is arranged in the air outlet channel. By arranging the flow equalizer in the air outlet channel, the flow equalizer can make the airflow out of the air outlet more uniform, so that the wind force on the second area is more uniform, reducing the risk of wrinkles caused by uneven force on the second area.

[0017] In some embodiments, the flow balancing plate is provided with a plurality of through holes, and the plurality of through holes are distributed in a plurality of rows and columns. By providing a plurality of rows and columns of through holes on the flow balancing plate, the air output of the flow balancing plate is made more uniform.

[0018] In some embodiments, there are multiple transmission rollers, which are arranged at intervals along the conveying direction of the pole piece, and each transmission roller is provided with at least one wind outlet, and the conveying direction of the pole piece is perpendicular to the width direction of the pole piece. By providing at least one wind outlet at each transmission roller, the pole piece on each transmission roller can be affected by the wind force blown by the wind outlet, and the second area is kept away from the transmission roller, thereby reducing the risk of the second area collapsing toward the transmission roller, thereby reducing the risk of wrinkles on the substrate and improving the processing quality of the pole piece.

[0019] In some embodiments, the air blowing mechanism further comprises an air supply unit, the air supply unit is connected to each air outlet, and the air supply unit is configured to provide air to the air outlet. By providing the air supply unit, the air supply unit can provide air to the air outlet to blow air toward the second area.

[0020] In the second aspect, the embodiment of the present application provides a pole piece processing equipment, including: a coating mechanism, a drying mechanism and a transmission device provided by any one of the embodiments of the first aspect; along the conveying direction of the pole piece, the coating mechanism is located upstream of the transmission device, and the coating mechanism is used to coat the active material layer on the surface of the pole piece away from the transmission roller; along the conveying direction of the pole piece, the drying mechanism is located downstream of the transmission device, and the drying mechanism is used to dry the pole piece, and the conveying direction of the pole piece is perpendicular to the width direction of the pole piece. After the coating mechanism coats the active material layer on the substrate, the transmission device can transmit the pole piece to the drying mechanism for drying. The transmission device improves the structural stability of the pole piece during the transmission process, reduces the risk of the pole piece structure being damaged, and improves the processing quality of the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a pole piece processing device provided in some embodiments of the present application;

[0023] Figure 2 A schematic diagram of the structure of a transmission device provided in some embodiments of the present application;

[0024] Figure 3 A schematic diagram of the structure of a pole piece provided in some embodiments of the present application;

[0025] Figure 4 A schematic diagram of the structure of the air outlet and the adjustment mechanism provided in some embodiments of the present application;

[0026] Figure 5 A schematic diagram of the structure of an air outlet, an adjustment plate and a current equalizing plate provided in some embodiments of the present application;

[0027] Figure 6 for Figure 5 AA section view in;

[0028] Figure 7 A schematic diagram of the structure of a transmission device provided in some other embodiments of the present application.

[0029] Icons: 100-pole processing equipment; 10-transmission device; 1-transmission roller; 2-blowing mechanism; 21-air outlet; 211-air outlet; 212-installation part; 2121-first surface; 2122-second surface; 2123-installation hole; 213-air outlet channel; 214-air inlet; 22-air supply unit; 3-mounting frame; 31-longitudinal beam; 32-first cross beam; 33-second cross beam; 3a-slide; 4-regulating machine Structure; 41-adjusting plate; 411-strip hole; 5-locking piece; 6-current equalizing plate; 61-through hole; 7-rolling assembly; 71-first pressing roller; 72-second pressing roller; 20-coating mechanism; 30-drying mechanism; 200-pole piece; 2001-substrate; 20011-first area; 20012-second area; 2002-active material layer; X-conveying direction of pole piece; Y-width direction of pole piece; Z-thickness direction of pole piece. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0032] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0035] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0036] The term "plurality" used in the present application refers to two or more (including two).

[0037] In the production process of battery cells, it is necessary to coat active material layers of different materials on both sides of the substrate along its thickness direction and dry them to make pole pieces. After the pole piece is made, the substrate has a first area coated with an active material layer and a second area not coated with the active material layer. The second area not coated with the active material layer is used to form the pole ear.

[0038] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0039] Battery cells include but are not limited to lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel metal hydride batteries, nickel cadmium batteries, lead storage batteries, etc. Among them, when the battery cell is a lithium ion battery, the active material layer on one side of the substrate along the thickness direction thereof can be a lithium ion embedding material such as lithium cobalt oxide and lithium iron phosphate, and the active material layer on the other side of the substrate along the thickness direction thereof can be a material such as graphite and silicon.

[0040] During the processing of the pole piece, an active material layer can be coated on one side of the substrate along its thickness direction and dried so that the active material layer adheres to the substrate. Subsequently, another active material layer can be coated on the other side of the substrate along its thickness direction, and the substrate is transferred from the transmission device to the drying mechanism for drying. During the transmission of the substrate, since the surface of the pole piece contacting the transmission device is coated with an active material layer, the second area of ​​the substrate not coated with the active material layer is prone to collapse, thereby increasing the risk of wrinkles on the substrate and affecting the processing quality of the pole piece.

[0041] In view of this, in order to improve the processing quality of the pole piece, the embodiment of the present application provides a transmission device, including a transmission roller and a blower mechanism, the blower mechanism includes an air outlet, the air outlet is located on the side of the second area facing the transmission roller, and the air outlet is used to blow air to the second area.

[0042] By blowing air toward the second area through the air outlet head, the wind blown out by the air outlet head can keep the second area away from the transmission roller, reducing the risk of the second area collapsing toward the transmission roller, thereby reducing the risk of wrinkles on the substrate and improving the processing quality of the pole piece.

[0043] The pole piece processing equipment is described below with reference to the accompanying drawings.

[0044] Please refer to Figure 1 , Figure 1The schematic diagram of the structure of the electrode processing equipment 100 provided in some embodiments of the present application. The embodiment of the present application provides a electrode processing equipment 100, including: a transmission device 10, a coating mechanism 20 and a drying mechanism 30.

[0045] The transmission mechanism 10 is used to transmit the electrode sheet 200 from the coating mechanism 20 to the drying mechanism 30. Along the conveying direction X of the electrode sheet, the coating mechanism 20 is located upstream of the transmission device 10, and the coating mechanism 20 is used to coat the active material layer 2002 on the surface of the electrode sheet 200 away from the conveying roller 1. Along the conveying direction X of the electrode sheet, the drying mechanism 30 is located downstream of the transmission device 10, and the drying mechanism 30 is used to dry the electrode sheet 200, and the conveying direction X of the electrode sheet is perpendicular to the width direction Y of the electrode sheet.

[0046] The specific structure of the transmission device is described in detail below with reference to the accompanying drawings.

[0047] Please refer to Figure 2 , Figure 2 Schematic diagram of the structure of the transmission device 10 provided in some embodiments of the present application. The present application embodiment provides a transmission device 10, the transmission device 10 is used to transmit the pole piece 200 ( Figure 2 ), the pole piece 200 includes a substrate 2001 and an active material layer 2002, the substrate 2001 has a first region 20011 provided with an active material layer 2002 and a second region 20012 not provided with an active material layer 2002, the first region 20011 and the second region 20012 are arranged along the width direction Y of the pole piece, characterized in that the transmission device 10 includes a transmission roller 1 and a blower mechanism, the transmission roller 1 is used to abut the active material layer 2002 when conveying the pole piece 200. The blower mechanism 2 includes an air outlet 21, the air outlet 21 is located on the side of the second region 20012 facing the transmission roller 1, and the air outlet 21 is used to blow air to the second region 20012.

[0048] The transmission roller 1 is used to transmit the pole piece 200. The number of transmission rollers 1 can be one or more. When there is one transmission roller 1, the transmission roller 1 can be a driving roller, and the transmission roller 1 is connected to a driving mechanism (not shown in the figure), and the driving mechanism is used to drive the transmission roller 1 to rotate, thereby driving the pole piece 200 to move; the transmission roller 1 can also be a transmission roller, and the pole piece 200 moves on the transmission roller 1 to drive the transmission roller 1 to rotate, thereby reducing the transmission resistance of the pole piece 200 and facilitating the movement of the pole piece 200. When there are multiple transmission rollers 1, one transmission roller 1 can be a driving roller, and the transmission roller 1 is connected to a driving mechanism, and the remaining transmission rollers 1 are transmission rollers; or all transmission rollers 1 can be transmission rollers. Among them, the driving mechanism may include a motor and a reducer, and the reducer is connected to the output end of the motor and the transmission roller 1, and the motor is used to drive the transmission roller 1 to rotate through the transmission of the reducer.

[0049] The air blowing mechanism 2 is used to blow air toward the second area 20012 of the substrate 2001. The air outlet 21 is a component that guides the airflow to blow toward the second area 20012. The number of air outlets 21 can be one or more. When there is one air outlet 21, the air outlet 21 is located on one side of the transmission roller 1 along the conveying direction X of the pole piece, and one air outlet 21 blows air toward the second area 20012 to blow the second area 20012 away from the transmission roller 1, thereby keeping the second area 20012 level with the first area 20011 and reducing the risk of wrinkles in the second area 20012. When there are multiple air outlets 21, multiple air outlets 21 can be arranged on both sides of the transmission roller 1 along the conveying direction X of the pole piece and can blow air toward the second area 20012; or multiple air outlets 21 can be arranged on the same side of the transmission roller 1 along the conveying direction X of the pole piece, and each air outlet 21 can blow air toward the second area 20012. When there are multiple transmission rollers 1 and multiple air outlets 21, the transmission rollers 1 and the air outlets 21 may correspond one to one, or each transmission roller 1 may be provided with air outlets 21 on both sides along the transmission direction of the pole piece 200, and each air outlet 21 blows air toward the second area 20012 to keep the second area 20012 level with the first area 20011, thereby reducing the risk of wrinkles in the second area 20012.

[0050] The positions of the air outlet head 21 and the transmission roller 1 may be relatively fixed, or the position of the air outlet head 21 may be adjustable relative to the transmission roller 1 .

[0051] The air blowing mechanism 2 may be provided with an air supply unit. When there are multiple air outlets 21, one air supply source may be provided corresponding to each air outlet 21, or one air supply source may simultaneously supply air to multiple air outlets 21. The air supply unit may be an air tank, a bellows, a blower, etc.

[0052] The substrate 2001 may have only one first region 20011 and one second region 20012, and the air outlet 21 may be disposed on the side of the transmission roller 1 close to the second region 20012, so that the air outlet 21 blows air toward the second region 20012. The substrate 2001 may also have one first region 20011 and two second regions 20012, the first region 20011 being located between the two second regions 20012, and a plurality of air outlets 21 may be disposed on both sides of the transmission roller 1 along the width direction Y of the pole piece, and the plurality of air outlets 21 blow air toward the second regions 20012 close to the transmission roller 1.

[0053] It can be understood that the conveying direction X of the pole piece is perpendicular to the width direction Y of the pole piece, and the width direction Y of the pole piece is parallel to the extension direction of the rotation axis of the transmission roller 1 .

[0054] In the embodiment of the present application, the transmission roller 1 can transmit the pole piece 200, the transmission roller 1 contacts the active material layer 2002 located in the first area 20011 on the substrate 2001, and the second area 20012 where the active material layer 2002 is not provided is spaced apart from the transmission roller 1. The air outlet 21 of the air blowing mechanism 2 can blow air toward the second area 20012 to keep the second area 20012 away from the transmission roller 1, reduce the risk of the second area 20012 collapsing onto the transmission roller 1, thereby reducing the risk of wrinkling of the substrate 2001 during the transmission process, and improving the processing quality of the pole piece 200.

[0055] In some embodiments, please refer to Figure 2 The transmission device 10 further comprises a mounting frame 3, the transmission roller 1 is rotatably disposed on the mounting frame 3 around its own axis, and the wind outlet head 21 is movably disposed on the mounting frame 3 along the width direction Y of the pole piece.

[0056] The mounting frame 3 is used to mount the transmission roller 1 and the air outlet 21. The number of mounting frames 3 can be one or more. When there is one mounting frame 3, one transmission roller 1 can be arranged on one mounting frame 3, or multiple transmission rollers 1 can be arranged on one mounting frame 3. When there are multiple mounting frames 3, the mounting frames 3 and the transmission rollers 1 can correspond one to one, or one mounting frame 3 can be installed with at least one transmission roller 1; wherein, at least one means that the number of transmission rollers 1 installed on each mounting frame 3 can be one or more.

[0057] The air outlet 21 can move on the mounting frame 3 to adjust the position of the air outlet 21. The mounting frame 3 may be provided with a locking mechanism, which has a locking state and an unlocking state, and the locking mechanism is configured to: lock the mounting frame 3 and the air outlet 21 in the locking state to limit the movement of the air outlet 21 on the mounting frame 3; and allow the air outlet 21 to move on the mounting frame 3 in the unlocking state to adjust the position of the air outlet 21 on the mounting frame 3. The air outlet 21 may also slide on the mounting frame 3, and the movement of the air outlet 21 is limited by the friction between the air outlet 21 and the mounting frame 3, so that the air outlet 21 blows air toward the second area 20012. As an example, Figure 2As shown, the mounting frame 3 includes longitudinal beams 31 relatively arranged along the width direction Y of the pole piece and a first beam 32 and a second beam 33 relatively arranged along the conveying direction X of the pole piece. The first beam 32 is located downstream of the second beam 33. The first beam 32, the second beam 33 and the two longitudinal beams 31 can be surrounded as a frame structure, and the transmission roller 1 is rotatably arranged on the two longitudinal beams 31. The first beam 32 and the second beam 33 are both provided with a chute 3a. The air outlet 21 is slidably arranged in the chute 3a along the width direction Y of the pole piece. The air outlet 21 has an abutting surface. The chute 3a of the first beam 32 and the second beam 33 are respectively in contact with the abutting surface to support the air outlet 21. The air outlet 21 limits the position of the air outlet 21 by the friction between the abutting surface and the chute 3a. Wherein, when there are multiple transmission rollers 1, adjacent transmission rollers 1 can share a mounting frame 3, and a first beam 32 or a second beam 33 can be arranged between two adjacent transmission rollers 1.

[0058] By setting the transmission roller 1 on the mounting frame 3, the mounting frame 3 can limit the position of the transmission roller 1, and the air outlet 21 is set on the mounting frame 3. The air outlet 21 can be set close to the transmission roller 1. When the air outlet 21 blows air to the pole piece 200 on the transmission roller 1, the air outlet 21 blows the second area 20012, which can drive the second area 20012 away from the transmission roller 1, reducing the risk of the second area 20012 being damaged by being placed on the transmission roller 1. The air outlet 21 is movably set on the mounting frame 3 along the width direction Y of the pole piece. When the position of the second area 20012 along the width direction Y of the pole piece on the transmission roller 1 changes, the position of the air outlet 21 can be adjusted so that the air outlet 21 can blow air to the second area 20012 of the substrate 2001.

[0059] In some embodiments, please refer to Figure 2 Along the conveying direction X of the pole piece, air outlets 21 are provided on both sides of the transmission roller 1, and the conveying direction X of the pole piece is perpendicular to the width direction Y of the pole piece.

[0060] In the embodiment where the transmission device 10 includes a mounting frame 3, the air outlets 21 on both sides of the transmission roller 1 can be arranged on the mounting frame 3. As an example, Figure 2 As shown, the transmission roller 1 is arranged on the mounting frame 3, and air outlets 21 are provided on both sides of the transmission roller 1 along the conveying direction X of the pole piece. The air outlets 21 blow air toward the second area 20012 to blow the second area 20012 above the transmission roller 1 away from the transmission roller 1.

[0061] By arranging air outlets 21 on both sides of the transmission roller 1, the air outlets 21 on both sides of the transmission roller 1 can blow air toward the second area 20012, so that the second area 20012 between the two air outlets 21 is away from the transmission roller 1, thereby reducing the risk of the second area 20012 collapsing toward the transmission roller 1, thereby reducing the risk of wrinkling of the substrate 2001 and improving the processing quality of the pole piece 200.

[0062] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 3 The schematic diagram of the structure of the pole piece 200 provided in some embodiments of the present application is as follows: The substrate 2001 includes two second regions 20012, along the width direction Y of the pole piece, the first region 20011 is located between the two second regions 20012, and each second region 20012 is provided with at least one wind outlet 21.

[0063] As an example, Figure 3 As shown, along the thickness direction Z of the electrode sheet, the first regions 20011 on both sides of the substrate 2001 are coated with active material layers 2002 of different materials, and the second regions 20012 of the substrate 2001 are not coated with active material layers 2002. Along the width direction Y of the electrode sheet, the second regions 20012 are provided on both sides of the substrate 2001. The conveying direction X of the electrode sheet, the width direction Y of the electrode sheet, and the thickness direction Z of the electrode sheet are perpendicular to each other. It can be understood that please refer to Figure 2 and Figure 3 The extension direction of the rolling axis of the transmission roller 1 is the width direction Y of the pole piece, and the air outlet 21 located on the same side of the transmission roller 1 along the width direction Y of the pole piece blows air toward the same second area 20012.

[0064] It is possible that only one air outlet 21 is provided in a second area 20012, or a plurality of air outlets 21 are provided in a second area 20012. As an example, Figure 2 As shown, a transmission roller 1 transmits a pole piece 200, and two air outlets 21 are arranged on both sides of the transmission roller 1 along the width direction Y of the pole piece, and the two air outlets 21 on the same side of the transmission roller 1 along the width direction Y of the pole piece are located on both sides of the transmission roller 1 along the conveying direction X of the pole piece.

[0065] By arranging at least one air outlet 21 in each second area 20012 , each second area 20012 has an air outlet 21 blowing air thereto, thereby reducing the risk of each second area 20012 collapsing toward the transmission roller 1 , thereby reducing the risk of wrinkling of the substrate 2001 and improving the processing quality of the pole piece 200 .

[0066] In some embodiments, please refer to Figure 4 , Figure 4The structure diagram of the air outlet 21 and the adjustment mechanism 4 provided in some embodiments of the present application. The air outlet 21 has an air outlet 211 facing the second area 20012 , and the air outlet 21 is provided with an adjustment mechanism 4 , which is configured to adjust the size of the air outlet 211 .

[0067] The adjustment mechanism 4 can adjust the size of the air outlet 211. The adjustment structure may change the size of the air outlet 211 by covering the area of ​​the air outlet 211. The adjustment mechanism 4 may also change the size of the air outlet 211 by changing the shape of the air outlet 211; for example, the air outlet head 21 is a rubber tube, and the adjustment mechanism 4 changes the size of the air outlet 211 of the rubber tube by squeezing the rubber tube.

[0068] By adjusting the size of the air outlet 211 , the air volume of the air outlet 211 can be adjusted to adjust the wind force of the air outlet head 21 blowing toward the second area 20012 .

[0069] In some embodiments, please refer to Figure 4 The adjusting mechanism 4 includes an adjusting plate 41 , and the adjusting plate 41 is adjustably disposed on the air outlet 21 to adjust the area of ​​the air outlet 211 covered by the adjusting plate 41 .

[0070] The adjusting plate 41 may be rotatably arranged on the air outlet 21, and the adjusting plate 41 may be rotated at the air outlet 211 to adjust the air outlet area of ​​the air outlet 211. Alternatively, the adjusting plate 41 may be movably arranged on the air outlet 21, and the adjusting plate 41 may be translated at the air outlet 211 to adjust the air outlet area of ​​the air outlet 211; wherein, the translation direction of the adjusting plate 41 is not limited, and is based on the area that can cover the air outlet 211. For example, the adjusting plate 41 may be translated along the width direction Y of the pole piece, or along the length direction of the pole piece 200.

[0071] By adjusting the position of the adjustment plate 41 to be adjustable on the air outlet 21 , the adjustment plate 41 can adjust the air outlet area of ​​the air outlet 211 , thereby adjusting the size of the air outlet 211 , adjusting the air outlet volume of the air outlet 211 , and also adjusting the air outlet position of the air outlet 211 .

[0072] In some embodiments, please refer to Figure 4 The adjustment plate 41 is disposed on the air outlet 21 in an adjustable manner along the width direction Y of the pole piece.

[0073] The adjustment plate 41 may be translated along the width direction Y of the pole piece to adjust the position of the adjustment plate 41; or the adjustment plate 41 may be provided with a plurality of sockets along the width direction Y of the pole piece, and the air outlet 21 may be provided with pins, which are selectively inserted into the sockets to adjust the position of the adjustment plate 41.

[0074] By adjusting the adjustment plate 41 so that the position thereof can be adjustably arranged on the air outlet 21 along the width direction Y of the pole piece, the air outlet size of the air outlet 211 can be adjusted when the air outlet 21 blows air toward the second area 20012 of different width sizes, so that the air outlet 21 can blow air toward the second area 20012 accordingly, thereby improving the supporting effect of the wind force on the second area 20012 and reducing the risk of the air outlet 21 blowing air toward the active material layer 2002 located in the first area 20011 and blowing off the active material layer 2002.

[0075] In some embodiments, each air outlet 21 is correspondingly provided with a plurality of adjustment plates 41 , and the plurality of adjustment plates 41 are arranged along the width direction Y of the pole piece.

[0076] As an example, Figure 4 As shown, there are two adjustment plates 41, which are arranged on both sides of the air outlet 21 along the width direction Y of the pole piece. The two adjustment plates 41 move along the width direction Y of the pole piece respectively to adjust the size of the air outlet 211 and fine-tune the position of the air outlet 211.

[0077] By providing a plurality of adjustment plates 41 , the weight of a single adjustment plate 41 is reduced, and the position of the adjustment plate 41 is easily adjusted, which is beneficial for adjusting the air volume and air outlet position of the air outlet 211 .

[0078] In some embodiments, the transmission device 10 further includes a locking member 5, the locking member 5 has a locked state and an unlocked state, and the locking member 5 is configured to: lock the adjustment plate 41 and the air outlet 21 in the locked state. In the unlocked state, the adjustment plate 41 is allowed to move relative to the air outlet 21 along the width direction Y of the pole piece to adjust the area of ​​the air outlet 211 covered by the adjustment plate 41.

[0079] The number of the locking member 5 can be one or more. When there are multiple adjustment plates 41, each adjustment plate 41 is provided with at least one locking member 5. The locking member 5 can be a bolt, a locking pin, etc.

[0080] As an example, Figure 4 As shown, the air outlet 21 has a mounting portion 212, and the mounting portion 212 has a first surface 2121 and a second surface 2122 that are arranged opposite to each other. The first surface 2121 is used to contact the mounting frame 3 so that the mounting frame 3 supports the air outlet 21. The mounting portion 212 is provided with a mounting hole 2123 ( Figure 4 The adjusting plate 41 is provided with a strip hole 411 extending along the width direction Y of the pole piece. The locking member 5 is a bolt. When the bolt is in a locked state, the bolt passes through the strip hole 411 and is screwed into the mounting hole 2123 to lock the adjusting plate 41 and the air outlet 21; when the bolt is in an unlocked state, the bolt is disengaged from the mounting hole 2123 to allow the adjusting plate 41 to move relative to the air outlet 21.

[0081] By switching the locking member 5 to the locked state, the locking member 5 can lock the adjustment plate 41 and the air outlet 21 to fix the size of the air outlet 211. By switching the locking member 5 to the unlocked state, the position of the adjustment plate 41 can be adjusted to adjust the size of the air outlet 211.

[0082] In some embodiments, please refer to Figure 5 and Figure 6 , Figure 5 A schematic diagram of the structure of the air outlet 21, the regulating plate 41 and the flow equalizing plate 6 provided in some embodiments of the present application; Figure 6 for Figure 5 The outlet head 21 has an outlet channel 213 formed inside, an air inlet 214 formed at one end of the outlet channel 213 and an outlet 211 toward the second area 20012 formed at the other end, and a flow equalizing plate 6 is disposed inside the outlet channel 213.

[0083] The equalizing plate 6 may be provided with multiple holes to achieve equal flow of the airflow. The equalizing plate 6 may also be provided with only one hole to achieve equal flow of the airflow; for example, along the width direction Y of the electrode piece, the equalizing plate 6 is provided with multiple first strip-shaped channels extending in the conveying direction X of the electrode piece at intervals, and a second strip-shaped channel extending in the width direction Y of the electrode piece is provided, and the second strip-shaped channel is arranged to cross each first strip-shaped channel to form a hole.

[0084] The air outlet channel 213 may be a conical structure, and the diameter of the air inlet 214 gradually increases in the direction of the diameter of the air outlet 211, so as to support the flow equalizer 6 through the air outlet channel 213. The air outlet channel 213 may also be a columnar structure, and a protrusion is provided in the air outlet channel 213, and the protrusion supports the flow equalizer 6.

[0085] In the embodiment where the air outlet 211 is provided with an adjustment plate 41 , the adjustment plate 41 can adjust the size of the air outlet 211 , and the adjustment plate 41 can limit the flow equalizing plate 6 from being separated from the air outlet channel 213 .

[0086] By arranging a flow equalizer 6 in the air outlet channel 213, the flow equalizer 6 can make the airflow out of the air outlet 211 more uniform, so that the wind force received by the second area 20012 is more uniform, reducing the risk of wrinkles caused by uneven force on the second area 20012.

[0087] In some embodiments, the current balancing plate 6 is provided with a plurality of through holes 61 , and the plurality of through holes 61 are distributed in a plurality of rows and columns.

[0088] Multiple rows and columns mean that there are multiple through holes 61 on the current equalizing plate 6. The multiple through holes 61 can be regarded as having multiple groups of through holes 61 extending along the first direction. The multiple groups of through holes 61 are arranged at intervals along the second direction. Each group of through holes 61 has multiple through holes 61 arranged at intervals along the first direction, and the first direction intersects with the second direction.

[0089] By providing multiple rows and columns of through holes 61 on the flow balancing plate 6 , the air output of the flow balancing plate 6 is made more uniform.

[0090] In some embodiments, please refer to Figure 7 , Figure 7 The schematic diagram of the structure of the transmission device 10 provided in some embodiments of the present application is as follows. There are multiple transmission rollers 1, and the multiple transmission rollers 1 are arranged at intervals along the conveying direction X of the pole piece, and each transmission roller 1 is provided with at least one air outlet 21, and the conveying direction X of the pole piece is perpendicular to the width direction Y of the pole piece.

[0091] There are multiple transmission rollers 1, and the directions of the transmission pole pieces 200 of the multiple transmission rollers 1 can be the same or different. One wind outlet 21 can be provided on each transmission roller 1, or wind outlets 21 can be provided on both sides of each transmission roller 1.

[0092] In addition to the transmission roller 1, the transmission device 10 may also be provided with other rollers for transmitting the pole piece 200. For example, the transmission device 10 also includes a driving roller, a guide roller, a tensioning roller, a pressure roller, and the like.

[0093] By arranging at least one wind outlet 21 at each transmission roller 1, the pole piece 200 on each transmission roller 1 can be affected by the wind force blown out by the wind outlet 21, and the second area 20012 is kept away from the transmission roller 1, thereby reducing the risk of the second area 20012 collapsing toward the transmission roller 1, thereby reducing the risk of wrinkling the substrate 2001 and improving the processing quality of the pole piece 200.

[0094] In some embodiments, please refer to Figure 7 The air blowing mechanism 2 further includes an air supply unit 22 , which is connected to each air outlet 21 , and is configured to provide air to the air outlet 21 .

[0095] The air supply unit 22 may be a blower, an air tank, or the like.

[0096] By providing the air supply unit 22 , the air supply unit 22 can provide air to the air outlet 21 so as to blow air toward the second area 20012 .

[0097] Please continue to refer to Figure 1. An embodiment of the present application provides a pole piece processing device 100, comprising: a coating mechanism 20, a drying mechanism 30 and a transmission device 10 provided by any one of the above embodiments. Along the conveying direction X of the pole piece, the coating mechanism 20 is located upstream of the transmission device 10, and the coating mechanism 20 is used to coat the active material layer 2002 on the surface of the pole piece 200 away from the transmission roller 1. Along the conveying direction X of the pole piece, the drying mechanism 30 is located downstream of the transmission device 10, and the drying mechanism 30 is used to dry the pole piece 200, and the conveying direction X of the pole piece is perpendicular to the width direction Y of the pole piece.

[0098] As an example, Figure 1 As shown, the transmission device 10 also includes a rolling assembly 7, and the rolling assembly 7 includes a first pressing roller 71 and a second pressing roller 72. The first pressing roller 71 and the second pressing roller 72 are used to cooperate in rolling and flattening the electrode sheet. The rolling assembly 7 is located upstream of the coating mechanism 20. The coating mechanism 20 and the first pressing roller 71 are arranged opposite to each other along the thickness direction of the electrode sheet. The coating mechanism 20 can coat the electrode sheet 200 attached to the first pressing roller 71. After the electrode sheet 200 is unwound, the rolling assembly 7 flattens the electrode sheet 200. After the coating mechanism 20 coats the active material layer 2002 on the electrode sheet 200, the transmission roller 1 transmits the electrode sheet 200, and the air outlet 21 blows up the second area 20012 on both sides of each transmission roller 1 to reduce the risk of collapse of the second area 20012.

[0099] In the above embodiment, after the coating mechanism 20 coats the active material layer 2002 onto the substrate 2001, the transmission device 10 can transmit the electrode 200 to the drying mechanism 30 for drying. The transmission device 10 improves the structural stability of the electrode 200 during the transmission process, reduces the risk of the structure of the electrode 200 being damaged, and improves the processing quality of the electrode 200.

[0100] Please continue to refer to Figure 2-Figure 7 The transmission device 10 includes a mounting frame 3, a transmission roller 1 and a blower mechanism 2. The transmission roller 1 is rotatably arranged on the mounting frame 3, and the transmission roller 1 is used to transmit the pole piece 200. The pole piece 200 has a first area 20011 and two second areas 20012. Along the width direction Y of the pole piece, the first area 20011 is located between the two second areas 20012. The blower mechanism 2 includes a plurality of air outlets 21, and the air outlets 21 are movably arranged on the mounting frame 3 along the width direction Y of the pole piece. Each transmission roller 1 is provided with air outlets 21 on both sides along the width direction Y of the pole piece, and along the conveying direction X of the pole piece, air outlets 21 capable of blowing air to the same second area 20012 are provided on both sides of the transmission roller 1. An adjustment plate 41 is provided on the air outlet 21, and the adjustment plate 41 can adjust the size of the air outlet 211 of the air outlet 21. The air outlet head 21 has an air outlet channel 213 in it, and a flow equalizing plate 6 is arranged in the air outlet channel 213 .

[0101] By setting the air blowing mechanism 2, the air outlet 21 of the air blowing mechanism 2 can blow air toward the second area 20012, reducing the risk of collapse of the second area 20012. The air outlet 21 can move along the width direction Y of the pole piece on the mounting frame 3, so as to facilitate adjustment of the position of the air outlet 21, so that the transmission device 10 can be suitable for transmission of more types of pole pieces 200. The adjustment plate 41 can adjust the size of the air outlet 211, so as to facilitate adjustment of the air volume and blowing area of ​​the air outlet 211 blowing toward the second area 20012. The flow equalizing plate 6 can make the air outlet 211 discharge air more evenly.

[0102] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0103] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transmission device for conveying an electrode sheet, wherein the electrode sheet comprises a substrate and an active material layer, wherein the substrate comprises a first region provided with the active material layer and a second region not provided with the active material layer, wherein the first region and the second region are arranged along the width direction of the electrode sheet, characterized in that: The transmission device comprises: A conveying roller, used for contacting the active material layer when conveying the electrode sheet; The air blowing mechanism comprises an air outlet head, wherein the air outlet head is located at a side of the second area facing the transmission roller, and the air outlet head is used for blowing air toward the second area.

2. The transmission device according to claim 1, characterized in that The transmission device further comprises a mounting frame, the transmission roller is rotatably arranged on the mounting frame around its own axis, and the wind outlet head is movably arranged on the mounting frame along the width direction of the pole piece.

3. The transmission device according to claim 1, characterized in that Along the conveying direction of the pole piece, the wind outlets are arranged on both sides of the transmission roller, and the conveying direction of the pole piece is perpendicular to the width direction of the pole piece.

4. The transmission device according to claim 1, characterized in that The substrate includes two second regions. Along the width direction of the pole piece, the first region is located between the two second regions. At least one wind outlet is correspondingly arranged in each second region.

5. The transmission device according to any one of claims 1 to 4, characterized in that: The air outlet head has an air outlet facing the second area, and the air outlet head is provided with an adjustment mechanism, and the adjustment mechanism is configured to adjust the size of the air outlet.

6. The transmission device according to claim 5, characterized in that The adjustment mechanism comprises an adjustment plate, and the position of the adjustment plate is adjustably arranged on the air outlet to adjust the area of ​​the air outlet covered by the adjustment plate.

7. The transmission device according to claim 6, characterized in that The adjustment plate is arranged on the wind outlet in an adjustable manner along the width direction of the pole piece.

8. The transmission device according to claim 7, characterized in that Each of the air outlets is correspondingly provided with a plurality of the adjustment plates, and the plurality of the adjustment plates are arranged along the width direction of the pole piece.

9. The transmission device according to claim 7, characterized in that: The transmission device also includes a locking piece, which has a locked state and an unlocked state. The locking piece is configured to: lock the adjustment plate and the air outlet in the locked state; and allow the adjustment plate to move relative to the air outlet along the width direction of the pole piece in the unlocked state to adjust the area of ​​the air outlet covered by the adjustment plate.

10. The transmission device according to any one of claims 1 to 4, characterized in that: An air outlet channel is formed inside the air outlet head, one end of the air outlet channel forms an air inlet, and the other end forms an air outlet facing the second area, and a flow equalizing plate is arranged inside the air outlet channel.

11. The transmission device according to claim 10, characterized in that The current balancing plate is provided with a plurality of through holes, and the plurality of through holes are distributed in a plurality of rows and columns.

12. The transmission device according to any one of claims 1 to 4, characterized in that: There are a plurality of transmission rollers, which are arranged at intervals along the conveying direction of the pole piece, and each transmission roller is provided with at least one air outlet head, and the conveying direction of the pole piece is perpendicular to the width direction of the pole piece.

13. The transmission device according to claim 12, characterized in that The air blowing mechanism further includes an air supply unit, which is connected to each of the air outlets and is configured to provide air to each of the air outlets.

14. A pole piece processing device, characterized in that: include: The transmission device according to any one of claims 1 to 13; A coating mechanism, located upstream of the transmission device along the conveying direction of the pole piece, and used for coating the active material layer on the surface of the pole piece away from the transmission roller; A drying mechanism is located downstream of the transmission device along the conveying direction of the electrode piece. The drying mechanism is used to dry the electrode piece. The conveying direction of the electrode piece is perpendicular to the width direction of the electrode piece.

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