Double-sided simultaneous micro-gravure coating device and method

Abstract

The invention relates to the technical field of lithium battery coating equipment, and discloses a double-sided simultaneous micro-concave coating device and method. The device comprises a first micro-concave coating assembly, a second micro-concave coating assembly and a third micro-concave coating assembly, the first dispensing assembly is used for dispensing the first surface of the pole piece; the second micro-concave coating assembly is used for carrying out micro-concave coating on the second surface of the pole piece; the second dispensing assembly is used for dispensing the second surface of the pole piece; and the drying oven is used for drying the pole piece. According to the double-sided simultaneous micro-concave coating device, double-sided coating of a pole piece is completed at the same time, all the steps of the whole coating process are closely connected, the connection time loss between procedures is reduced, full-automatic operation without excessive manual intervention is achieved through reasonable equipment design and an automatic control system, and the working efficiency is improved. The production efficiency and the coating quality are greatly improved, errors and uncertainty caused by manual operation are reduced, and meanwhile the stability and the consistency of pole piece coating are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery coating equipment, and in particular relates to a double-sided simultaneous micro-concave coating device and method. Background Art

[0002] The current electrode primer coating method is a two-step operation. First, the primer slurry is coated on the first side of the electrode, then it is dried, and then the second side of the electrode is coated. For example, in the production process of lithium battery electrodes, this method is more common. First, the prepared primer slurry is evenly coated on one side of the electrode plate, and the solvent and other components in the slurry are removed by drying equipment to dry and solidify it, and then the same operation is repeated to coat the other side.

[0003] However, the existing electrode primer coating is divided into two steps: coating and drying, which means that corresponding equipment is needed to complete these two steps respectively, and sufficient space must be ensured to place these equipment and reserve space for material circulation and operation. As a result, the entire electrode primer coating operation needs to occupy a larger plant space, increasing the company's site cost investment. In addition, the increase in the number and complexity of equipment will also increase the purchase cost and maintenance cost of the equipment. In addition, each side needs to be dried after coating, and the drying operation consumes a lot of heat energy.

[0004] Therefore, the existing electrode primer coating method has problems such as high energy consumption and high equipment cost. Summary of the invention

[0005] In order to solve the problems of large energy consumption and high equipment cost in the existing electrode primer coating method in the prior art, the present invention provides a double-sided simultaneous micro-concave coating device and method.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0007] According to one aspect of an embodiment of the present invention, there is provided a double-sided simultaneous micro-concave coating device, comprising:

[0008] A first micro-concave coating assembly, used for performing micro-concave coating on the first surface of the pole piece;

[0009] A first glue dispensing component, used for dispensing glue on the first surface of the electrode;

[0010] A second micro-concave coating assembly, used for performing micro-concave coating on the second surface of the pole piece;

[0011] A second glue dispensing component, used for dispensing glue on the second surface of the pole piece; and

[0012] Oven, used to dry the electrodes.

[0013] In some optional implementations, the first micro-concave coating assembly includes a first main roller assembly, an approach roller assembly and a first scraper assembly, the approach roller assembly is arranged in parallel with the first main roller assembly, the approach roller assembly approaches or moves away from the first main roller assembly under the drive of a first driving assembly, the first scraper assembly is arranged in parallel with the first main roller assembly, and the first scraper assembly approaches or moves away from the first main roller assembly under the drive of a second driving assembly;

[0014] And / or, the second micro-concave coating assembly includes a second main roller assembly and a second scraper assembly, the second scraper assembly is arranged in parallel with the second main roller assembly, and the second scraper assembly approaches or moves away from the second main roller assembly under the drive of the third driving assembly.

[0015] In some optional implementations, the first micro-dimpled coating assembly further includes a first material trough assembly, the first material trough assembly is arranged below the first main roller assembly and parallel to the first main roller assembly, and the first material trough assembly is driven by a fourth driving assembly to approach or move away from the first main roller assembly;

[0016] And / or, the second micro-concave coating assembly also includes a second material trough assembly, which is arranged below the second main roller assembly and parallel to the second main roller assembly, and the second material trough assembly approaches or moves away from the second main roller assembly under the drive of the fifth driving assembly.

[0017] In some optional implementations, the first dispensing assembly includes a first concave roller assembly, a third scraper assembly and a sixth drive assembly, the third scraper assembly is mounted on a mounting frame, the third scraper assembly is arranged in parallel with the first concave roller assembly, the third scraper assembly is driven by a seventh drive assembly to approach or move away from the first concave roller assembly, and the mounting frame is driven by the sixth drive assembly to approach or move away from the pole piece;

[0018] And / or, the second dispensing assembly includes a second concave roller assembly and a fourth scraper assembly, the fourth scraper assembly is arranged in parallel with the second concave roller assembly, and the fourth scraper assembly approaches or moves away from the second concave roller assembly under the drive of the eighth driving assembly.

[0019] In some optional implementations, the first concave roller assembly includes a first center roller and a plurality of first gravure sleeves, wherein the plurality of first gravure sleeves are arranged on the first center roller and are arranged in parallel along the radial direction of the first center roller;

[0020] The third scraper assembly includes a plurality of first scrapers, each of which is disposed opposite to one of the first gravure sleeves;

[0021] And / or, the second concave roller assembly comprises a second center roller and a plurality of second gravure sleeves, wherein the plurality of second gravure sleeves are arranged on the second center roller and are arranged in parallel along the radial direction of the second center roller;

[0022] The fourth scraper assembly includes a plurality of second scrapers, and each of the second scrapers is respectively arranged opposite to one of the second gravure sleeves.

[0023] In some optional implementations, the first dispensing assembly further includes a third material trough assembly, and the third material trough assembly is disposed below the first concave roller assembly;

[0024] And / or, the second dispensing assembly further includes a fourth trough assembly, and the fourth trough assembly is disposed below the second concave roller assembly.

[0025] In some optional implementations, it further includes a first air flotation component, wherein the first air flotation component is disposed between the second dimple coating component and the second glue dispensing component;

[0026] The first air-floating assembly includes a first air-floating plate, a second air-floating plate and a first adjusting assembly, the first air-floating plate and the second air-floating plate are arranged opposite to and in parallel, and the first adjusting assembly is respectively connected to the first air-floating plate and / or the second air-floating plate to adjust the distance between the first air-floating plate and the second air-floating plate;

[0027] And / or, further comprising a second air flotation component, wherein the second air flotation component is disposed between the second glue dispensing component and the oven;

[0028] The second air-floating assembly includes a third air-floating plate, a fourth air-floating plate and a second adjustment assembly. The third air-floating plate and the fourth air-floating plate are arranged opposite to and in parallel. The second adjustment assembly is respectively connected to the third air-floating plate and / or the fourth air-floating plate to adjust the distance between the third air-floating plate and the fourth air-floating plate.

[0029] In some optional implementations, a first adjusting roller assembly is further included, wherein the first adjusting roller assembly is arranged at the input end of the first micro-dimpled coating assembly to adjust the direction and wrap angle of the pole piece entering the first micro-dimpled coating assembly;

[0030] And / or, further comprising a second adjusting roller assembly, the second adjusting roller assembly being arranged between the first dimple coating assembly and the first glue dispensing assembly to adjust the direction and wrap angle of the pole piece entering the first glue dispensing assembly;

[0031] And / or, it also includes a third adjusting roller assembly, which is arranged between the first dispensing assembly and the second micro-concave coating assembly to adjust the direction and wrap angle of the pole piece entering the second micro-concave coating assembly.

[0032] According to another aspect of an embodiment of the present invention, a method for double-sided simultaneous micro-concave coating is provided, wherein a pole piece is double-sided coated by the double-sided simultaneous micro-concave coating device described above; the method comprises the steps of:

[0033] Performing micro-dimple coating on the first side of the pole piece;

[0034] Apply glue to the first side of the pole piece;

[0035] Performing micro-dimpled coating on the second side of the pole piece;

[0036] Dispense glue on the second side of the pole piece;

[0037] Dry the electrode.

[0038] In some optional implementations, before the first surface of the pole piece is coated with micro-dimples, the direction and wrap angle of the micro-dimple coating on the first surface of the pole piece are adjusted;

[0039] and / or, before dispensing glue on the first surface of the pole piece, adjusting the direction and wrap angle of dispensing glue on the first surface of the pole piece;

[0040] and / or, before the second surface of the pole piece is coated with micro-dimples, the direction and wrap angle of the micro-dimple coating on the second surface of the pole piece are adjusted;

[0041] and / or, before dispensing glue on the second surface of the pole piece, supporting the pole piece by a first air flotation assembly;

[0042] And / or, before the pole piece is dried, the pole piece is supported by a second air flotation assembly.

[0043] In summary, the present invention has at least the following benefits:

[0044] The double-sided simultaneous micro-concave coating device provided by the present invention sequentially completes a series of processes including micro-concave coating on the first side of the electrode piece, glue dispensing on the first side of the electrode piece, micro-concave coating on the second side of the electrode piece, glue dispensing on the second side of the electrode piece, and drying, thereby achieving simultaneous double-sided coating of the electrode piece, and the various steps of the entire coating process are closely connected, reducing the connection time loss between the processes, and through reasonable equipment design and automated control system, fully automatic operation without excessive manual intervention is achieved, which greatly improves production efficiency and coating quality, reduces errors and uncertainties caused by manual operation, and ensures the stability and consistency of electrode coating.

[0045] The double-sided simultaneous micro-concave coating method provided by the present invention adopts the above-mentioned double-sided simultaneous micro-concave coating device to perform double-sided coating on the electrode. The various steps of the entire coating process are closely connected, which reduces the connection time loss between the working procedures and realizes full-automatic operation without excessive manual intervention, greatly improves the production efficiency and coating quality, reduces the errors and uncertainties caused by manual operation, and ensures the stability and consistency of the electrode coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A side view of a double-sided simultaneous micro-concave coating device provided by an embodiment of the present invention.

[0047] Figure 2 A schematic structural diagram of a double-sided simultaneous micro-concave coating device provided in an embodiment of the present invention.

[0048] Figure 3 A side view of a first micro-dimpled coating component of a double-sided simultaneous micro-dimpled coating device provided by an embodiment of the present invention.

[0049] Figure 4 A schematic diagram of the first angle structure of a first micro-concave coating component of a double-sided simultaneous micro-concave coating device provided in an embodiment of the present invention.

[0050] Figure 5 A schematic diagram of the second angle structure of the first micro-concave coating component of a double-sided simultaneous micro-concave coating device provided in an embodiment of the present invention.

[0051] Figure 6 A side view of a second micro-dimpled coating assembly of a double-sided simultaneous micro-dimpled coating device provided by an embodiment of the present invention.

[0052] Figure 7 A schematic structural diagram of a second micro-concave coating assembly of a double-sided simultaneous micro-concave coating device provided in an embodiment of the present invention.

[0053] Figure 8 A side view of a first dispensing component of a double-sided simultaneous micro-dimpled coating device provided in an embodiment of the present invention.

[0054] Fig. 9 A schematic structural diagram of a first dispensing component of a double-sided simultaneous micro-concave coating device provided in an embodiment of the present invention.

[0055] Fig.10 A schematic structural diagram of a second dispensing component of a double-sided simultaneous micro-concave coating device provided in an embodiment of the present invention.

[0056] Fig.11 A schematic structural diagram of a first air flotation component of a double-sided simultaneous micro-dimpled coating device provided in an embodiment of the present invention.

[0057] Markings in the figure:

[0058] 10. A first dimple coating assembly;

[0059] 101. first main roller assembly; 102. approach roller assembly; 103. first scraper assembly; 104. first drive assembly;

[0060] 105, second drive assembly; 1051, first drive unit; 1052, second drive unit; 1053, screw assembly; 1054, slide rail assembly;

[0061] 106. First trough assembly; 107. Fourth drive assembly;

[0062] 20. The first dispensing component;

[0063] 201, first concave roller assembly; 2011, first center roller; 2012, first gravure sleeve;

[0064] 202, third scraper assembly; 2021, first scraper; 2022, first driving cylinder;

[0065] 203, mounting frame; 204, seventh drive assembly; 205, sixth drive assembly; 206, third trough assembly; 207, first slide bar;

[0066] 30. A second dimple coating assembly;

[0067] 301, second main roller assembly; 302, second scraper assembly; 303, third driving assembly;

[0068] 40. A second dispensing component;

[0069] 401, second concave roller assembly; 4011, second center roller; 4012, second gravure sleeve 4012;

[0070] 402, fourth scraper assembly; 4021, second scraper; 4022, second driving cylinder;

[0071] 404, eighth driving assembly; 407, second slide bar;

[0072] 50, first air flotation assembly; 501, first air flotation plate; 502, second air flotation plate; 503, first adjustment assembly;

[0073] 60. A second air flotation assembly;

[0074] 71. A first adjusting roller assembly; 72. A second adjusting roller assembly; 73. A third adjusting roller assembly;

[0075] 100, rack;

[0076] 200, pole piece; DETAILED DESCRIPTION

[0077] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of them.

[0078] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0079] In order to solve the problems of large energy consumption and high equipment cost in the existing electrode primer coating method in the prior art, the embodiment of the present invention provides a double-sided simultaneous micro-concave coating device.

[0080] In this embodiment, the double-sided simultaneous micro-concave coating device, such as Figure 1-2 As shown, it includes: a first micro-concave coating component 10, a first glue dispensing component 20, a second micro-concave coating component 30, a second glue dispensing component 40 and an oven, wherein the first micro-concave coating component 10 is used to perform micro-concave coating on the first side of the pole piece 200; the first glue dispensing component 20 is used to dispense glue on the first side of the pole piece 200; the second micro-concave coating component 30 is used to perform micro-concave coating on the second side of the pole piece 200; the second glue dispensing component 40 is used to dispense glue on the second side of the pole piece 200; and the oven is used to dry the pole piece 200.

[0081] In this embodiment, the double-sided simultaneous micro-concave coating device also includes a frame 100, a first micro-concave coating component 10, a first glue dispensing component 20, a second micro-concave coating component 30 and a second glue dispensing component 40 are installed on the frame 100, and an oven is set on one side of the frame 100, and the first micro-concave coating component 10, the first glue dispensing component 20, the second micro-concave coating component 30, the second glue dispensing component 40 and the oven are arranged in sequence along the transmission direction of the electrode 200.

[0082] Therefore, the double-sided simultaneous micro-concave coating device provided in this embodiment, during the transmission process of the electrode 200, sequentially completes a series of processes such as micro-concave coating on the first side of the electrode 200, glue dispensing on the first side of the electrode 200 that has completed the micro-concave coating process, micro-concave coating on the second side of the electrode 200 that has completed the glue dispensing process on the first side, glue dispensing on the second side of the electrode 200 that has completed the micro-concave coating process, and drying the electrode 200 that has completed the glue dispensing process on the second side, so that the double-sided coating and glue dispensing of the electrode 200 can be completed simultaneously during the transmission process of the electrode 200, and the various steps of the entire coating process are closely connected, which reduces the connection time loss between the processes, and through reasonable equipment design and automated control system, fully automatic operation without excessive manual intervention is realized, which greatly improves the production efficiency and coating quality of the electrode 200, reduces the errors and uncertainties caused by manual operation, and ensures the stability and consistency of the coating of the electrode 200.

[0083] This embodiment is a preferred embodiment, and the specific structure of the first micro-dimpled coating component 10 is optimized.

[0084] like Figure 3-5 As shown, the first micro-concave coating assembly 10 includes a first main roller assembly 101, an approach roller assembly 102 and a first scraper assembly 103. The approach roller assembly 102 is arranged in parallel with the first main roller assembly 101, and the approach roller assembly 102 approaches or moves away from the first main roller assembly 101 under the drive of the first driving assembly 104. The first scraper assembly 103 is arranged in parallel with the first main roller assembly 101, and the first scraper assembly 103 approaches or moves away from the first main roller assembly 101 under the drive of the second driving assembly 105.

[0085] In this embodiment, the main roller of the first main roller assembly 101 is a micro-concave roller, which rotates along the transmission direction of the pole piece 200, and completes the micro-concave coating process on the first surface of the pole piece 200 in contact with it during the rotation process. The first main roller assembly 101 can replace main rollers of different processing widths according to pole pieces 200 of different sizes.

[0086] The pole piece 200 passes between the first main roller assembly 101 and the approach roller assembly 102. The approach roller assembly 102 mainly includes two approach rollers arranged parallel to the first main roller assembly 101. There is a certain gap between the two approach rollers and the first main roller assembly 101, and a certain angle is formed between the approach rollers and the first main roller assembly 101.

[0087] In addition, during the operation of the first micro-concave coating assembly 10, the driving approach roller assembly 102 of the first driving assembly 104 approaches the first main roller assembly 101, so that the two approach rollers of the approach roller assembly 102 contact the second surface of the pole piece 200 to limit the pole piece 200. When the first micro-concave coating assembly 10 is not in operation, the driving approach roller assembly 102 of the first driving assembly 104 is away from the first main roller assembly 101.

[0088] The first driving assembly 104 is a cylinder.

[0089] In this embodiment, the first scraper assembly 103 mainly includes a scraper for adjusting the thickness of the micro-concave coating of the first main roller assembly 101 .

[0090] The second driving assembly 105 for driving the first scraper assembly 103 includes at least a first driving part 1051 and a second driving part 1052. The first driving part 1051 is connected to the first scraper assembly 103 to drive the first scraper assembly 103 to move in the horizontal direction or to drive the first scraper assembly 103 to rotate so as to adjust the horizontal distance between the end of the first scraper assembly 103 and the first main roller assembly 101. The second driving part 1052 is connected to the mounting plate on which the first driving part 1051 is installed to drive the mounting plate to drive the first scraper assembly 103 to move in the vertical direction so as to adjust the vertical distance between the first scraper assembly 103 and the first main roller assembly 101.

[0091] Therefore, the linear distance between the first scraper assembly 103 and the first main roller assembly 101 can be adjusted by the first driving unit 1051 and the second driving unit 1052, thereby adjusting the thickness of the micro-concave coating completed by the first main roller assembly 101.

[0092] When the second driving part 1052 completes the position adjustment of the first scraper assembly 103 in the vertical direction, the screw assembly 1053 cooperates with the slide rail assembly 1054 to complete the installation plate and drive the first scraper assembly 103 to move in the vertical direction.

[0093] Specifically, the second driving part 1052 is connected to the screw assembly 1053 . When the screw assembly 1053 is driven to rotate, the mounting plate drives the first scraper assembly 103 to move in the vertical direction through the slide rail assembly 1054 .

[0094] This embodiment is a preferred embodiment. The first micro-concave coating assembly 10 also includes a first material trough assembly 106. The first material trough assembly 106 is arranged below the first main roller assembly 101 and parallel to the first main roller assembly 101. The first material trough assembly 106 approaches or moves away from the first main roller assembly 101 under the drive of the fourth driving assembly 107.

[0095] In this embodiment, the first trough assembly 106 contains slurry, which is close to or away from the first main roller assembly 101 according to the working state of the first micro-concave coating assembly 10.

[0096] In addition, in this embodiment, the first driving part 1051 adopts a cylinder, the second driving part 1052 adopts a motor, and the fourth driving component 107 adopts a cylinder.

[0097] This embodiment is a preferred embodiment, and the specific structure of the second micro-dimpled coating assembly 30 is optimized.

[0098] like Figure 6-7 As shown, the second micro-concave coating assembly 30 includes a second main roller assembly 301 and a second scraper assembly 302. The second scraper assembly 302 is arranged parallel to the second main roller assembly 301. The second scraper assembly 302 approaches or moves away from the second main roller assembly 301 under the drive of the third driving assembly 303.

[0099] The second micro-concave coating assembly 30 also includes a second trough assembly 304, which is arranged below the second main roller assembly 301 and parallel to the second main roller assembly 301. The second trough assembly 304 approaches or moves away from the second main roller assembly 301 under the drive of the fifth driving assembly.

[0100] In this embodiment, the second micro-concave coating assembly 30 is used to perform micro-concave coating on the second surface of the electrode 200. Therefore, the specific structures of the second main roller assembly 301, the second scraper assembly 302 and the third driving assembly 303 driving the second scraper assembly 302 are the same as the first main roller assembly 101, the first scraper assembly 103 and the second driving assembly 105, and are not repeated in this embodiment.

[0101] In addition, the second trough assembly 304 in the second micro-concave coating assembly 30 and the fifth driving assembly for driving the second trough assembly 304 to move have the same structure as the first trough assembly 106 in the first micro-concave coating assembly 10 and the fourth driving assembly 107 for driving the first trough assembly 106 to move, and will not be repeated in this embodiment.

[0102] This embodiment is a preferred embodiment, and the specific structure of the first dispensing component 20 is optimized.

[0103] like Figure 8-9As shown, the first glue dispensing assembly 20 includes a first concave roller assembly 201, a third scraper assembly 202 and a sixth drive assembly 205. The third scraper assembly 202 is installed on a mounting frame 203. The third scraper assembly 202 is arranged parallel to the first concave roller assembly 201. The third scraper assembly 202 approaches or moves away from the first concave roller assembly 201 under the drive of the seventh drive assembly 204, and the mounting frame 203 approaches or moves away from the pole piece 200 under the drive of the sixth drive assembly 205.

[0104] The first concave roller assembly 201 includes a first center roller 2011 and a plurality of first gravure sleeves 2012. The plurality of first gravure sleeves 2012 are sleeved on the first center roller 2011 and arranged in parallel along the radial direction of the first center roller 2011. The spacing between two adjacent first gravure sleeves 2012 is adjustable.

[0105] The third scraper assembly 202 includes a plurality of first scrapers 2021 , and each first scraper 2021 is disposed opposite to a first gravure sleeve 2012 .

[0106] In addition, the third scraper assembly 202 further includes a first driving cylinder 2022 connected to the first scraper 2021 to drive the first scraper 2021 to rotate, so that the first scraper 2021 approaches or moves away from the first concave roller assembly 201 .

[0107] A first slide bar 207 parallel to the first concave roller assembly 201 is provided along the axial direction of the first concave roller assembly 201, and the first driving cylinder 2022 is movably mounted on the first slide bar 207 to adjust the distance between two adjacent first scrapers 2021 according to the distance between two adjacent first gravure sleeves 2012.

[0108] The seventh driving assembly 204 is connected to the third scraper assembly 202 to drive the third scraper assembly 202 to move in the horizontal direction, thereby adjusting the distance between the third scraper assembly 202 and the first concave roller assembly 201 in the horizontal direction.

[0109] The sixth driving assembly 205 is connected to the mounting frame 203 , and drives the mounting frame 203 to drive the third scraper assembly 202 to move in the vertical direction, so as to adjust the distance between the third scraper assembly 202 and the first concave roller assembly 201 in the vertical direction.

[0110] Therefore, the linear distance between the third scraper assembly 202 and the first concave roller assembly 201 can be adjusted by the seventh driving assembly 204 and the sixth driving assembly 205, thereby adjusting the thickness of the glue dispensed by the first concave roller assembly 201.

[0111] The seventh driving assembly 204 adopts a cylinder, the sixth driving assembly 205 adopts a driving motor, and the specific movement process of the sixth driving assembly 205 driving the third scraper assembly 202 to move in the vertical direction refers to the movement process of the second driving part 1052 of the first micro-concave coating assembly 10 driving the first scraper assembly 103 in the vertical direction, which will not be repeated in this embodiment.

[0112] In addition, the first glue dispensing assembly 20 of the present embodiment further includes a third material trough assembly 206 , and the third material trough assembly 206 is disposed below the first concave roller assembly 201 .

[0113] The third material trough assembly 206 is used to contain GIC glue, and the first concave roller assembly 201 is used to apply the GIC glue on the first surface of the pole piece 200 .

[0114] The third trough assembly 206 is also moved in the vertical direction by a cylinder assembly to adjust the distance between it and the first concave roller assembly 201 .

[0115] As a preferred embodiment, this embodiment optimizes the specific structure of the second dispensing component 40.

[0116] Specifically, Fig.10 As shown, the second dispensing assembly 40 includes a second concave roller assembly 401 and a fourth scraper assembly 402 . The fourth scraper assembly 402 is arranged parallel to the second concave roller assembly 401 . The fourth scraper assembly 402 approaches or moves away from the second concave roller assembly 401 under the drive of the eighth driving assembly 404 .

[0117] The second concave roller assembly 401 includes a second center roller 4011 and a plurality of second gravure sleeves 4012. The plurality of second gravure sleeves 4012 are sleeved on the second center roller 4011 and arranged in parallel along the radial direction of the second center roller 4011. The spacing between two adjacent second gravure sleeves 4012 is adjustable.

[0118] The fourth scraper assembly 402 includes a plurality of second scrapers 4021 , and each second scraper 4021 is disposed opposite to a second gravure sleeve 4012 .

[0119] In addition, the fourth scraper assembly 402 further includes a second driving cylinder 4022 connected to the second scraper 4021 to drive the second scraper 4021 to rotate, so that the second scraper 4021 approaches or moves away from the second concave roller assembly 401 .

[0120] A second slide bar 407 parallel to the second concave roller assembly 401 is provided along the axial direction of the second concave roller assembly 401, and the second driving cylinder 4022 is movably mounted on the second slide bar 407 to adjust the distance between two adjacent second scrapers 4021 according to the distance between two adjacent second gravure sleeves 4012.

[0121] The eighth driving assembly 404 is connected to the fourth scraper assembly 402 to drive the fourth scraper assembly 402 to move in the horizontal direction, thereby adjusting the distance between the fourth scraper assembly 402 and the second concave roller assembly 401 in the horizontal direction.

[0122] In addition, the second glue dispensing component 40 of this embodiment also includes a fourth material trough component, and the fourth material trough component is arranged below the second concave roller component 401.

[0123] The fourth material trough assembly is used to contain GIC glue, and the second concave roller assembly 401 is used to apply the GIC glue on the second surface of the pole piece 200.

[0124] The fourth trough assembly also moves in the vertical direction through a cylinder assembly to adjust the distance between it and the second concave roller assembly 401.

[0125] This embodiment is a preferred embodiment. The double-sided simultaneous micro-concave coating device also includes a first air flotation component 50 and a second air flotation component 60. The first air flotation component 50 is arranged between the second micro-concave coating component 30 and the second glue dispensing component 40, and the second air flotation component 60 is arranged between the second glue dispensing component 40 and the oven.

[0126] Specifically, Fig.11 As shown, the first air-floating assembly 50 includes a first air-floating plate 501, a second air-floating plate 502 and a first adjusting assembly 503. The first air-floating plate 501 and the second air-floating plate 502 are arranged opposite to and in parallel. The first adjusting assembly 503 is respectively connected to the first air-floating plate 501 and / or the second air-floating plate 502 to adjust the distance between the first air-floating plate 501 and the second air-floating plate 502.

[0127] In addition, the first adjustment component 503 can also adjust the relative angle between the first air-floating plate 501 and the second air-floating plate 502 so that the pole piece 200 passing through the first air-floating plate 501 and the second air-floating plate 502 remains stable and is always located in the middle position between the first air-floating plate 501 and the second air-floating plate 502 and does not contact the first air-floating plate 501 and the second air-floating plate 502.

[0128] Preferably, the first adjustment component 503 uses a rotary cylinder to drive the first air floating plate 501 and / or the second air floating plate 502 to rotate, so as to adjust the distance and relative angle between the first air floating plate 501 and the second air floating plate 502 .

[0129] The second air-floating assembly 60 includes a third air-floating plate, a fourth air-floating plate, and a second adjusting assembly. The third air-floating plate and the fourth air-floating plate are arranged opposite to and in parallel. The second adjusting assembly is connected to the third air-floating plate and / or the fourth air-floating plate respectively to adjust the distance between the third air-floating plate and the fourth air-floating plate, so that the pole piece 200 passing through the third air-floating plate and the fourth air-floating plate remains stable and is always located in the middle position between the third air-floating plate and the fourth air-floating plate and does not contact the third air-floating plate and the fourth air-floating plate.

[0130] The second adjustment component can use a linear cylinder or a rotary cylinder according to needs to adjust the distance and / or relative angle between the third air floating plate and the fourth air floating plate.

[0131] The pole piece 200 passes through the second air flotation assembly 60 and enters the oven to complete full flotation heating and drying.

[0132] Embodiment As a preferred embodiment, the double-sided simultaneous micro-concave coating device further includes a first adjusting roller assembly 71 , a second adjusting roller assembly 72 and a third adjusting roller assembly 73 .

[0133] Among them, the first adjusting roller assembly 71 is arranged at the input end of the first micro-concave coating assembly 10 to adjust the direction and wrap angle of the pole piece 200 entering the first micro-concave coating assembly 10; the second adjusting roller assembly 72 is arranged between the first micro-concave coating assembly 10 and the first glue dispensing assembly 20 to adjust the direction and wrap angle of the pole piece 200 entering the first glue dispensing assembly 20; the third adjusting roller assembly 73 is arranged between the first glue dispensing assembly 20 and the second micro-concave coating assembly 30 to adjust the direction and wrap angle of the pole piece 200 entering the second micro-concave coating assembly 30.

[0134] The first adjusting roller assembly 71, the second adjusting roller assembly 72 and the third adjusting roller assembly 73 provided in this embodiment can adjust the travel direction and angle of the pole piece 200 during its processing, thereby ensuring the stability and processing quality of the pole piece 200 in the next processing step.

[0135] In some optional embodiments, the embodiments of the present invention further provide a double-sided simultaneous micro-concave coating method, which coats the pole piece 200 on both sides by using the double-sided simultaneous micro-concave coating device described in any of the above embodiments.

[0136] In this embodiment, the double-sided simultaneous micro-concave coating method comprises the steps of:

[0137] S10. Perform micro-dimple coating on the first surface of the pole piece 200.

[0138] Specifically, in this step, the first micro-concave coating assembly 10 is used to complete the micro-concave coating on the first surface of the pole piece 200 .

[0139] S20. Apply glue to the first surface of the electrode 200.

[0140] Specifically, in this step, the first glue dispensing component 20 is used to complete the glue dispensing on the first surface of the pole piece 200 .

[0141] S30. Perform micro-dimple coating on the second surface of the pole piece 200.

[0142] Specifically, in this step, the second micro-concave coating assembly 30 is used to complete the micro-concave coating on the second surface of the pole piece 200 .

[0143] S40. Apply glue to the second surface of the electrode piece 200.

[0144] Specifically, in this step, the second glue dispensing component 40 is used to complete the glue dispensing on the second surface of the pole piece 200 .

[0145] S50: Drying the electrode 200.

[0146] Specifically, in this step, the pole piece 200 is dried in an oven.

[0147] In this embodiment, since the double-sided micro-dimpled coating device described in any of the above embodiments is used to coat the pole piece 200 on both sides, the specific structures of the first micro-dimpled coating assembly 10, the first dispensing assembly 20, the second micro-dimpled coating assembly 30, the second dispensing assembly 40 and the oven refer to the above-mentioned double-sided micro-dimpled coating device embodiment, and this embodiment will not be repeated.

[0148] This embodiment is a preferred embodiment, and the double-sided simultaneous micro-concave coating method further includes:

[0149] Before the first surface of the pole piece 200 is coated with micro-dimples, the conveying direction and wrap angle position of the pole piece 200 are adjusted.

[0150] Before dispensing glue on the first side of the pole piece 200 , the conveying direction and wrap angle position of the pole piece 200 are adjusted.

[0151] Before the second surface of the pole piece 200 is coated with micro-dimples, the conveying direction and wrap angle position of the pole piece 200 are adjusted.

[0152] Before glue is dispensed on the second surface of the pole piece 200 , the pole piece 200 is supported by the first air floating assembly 50 .

[0153] Before the pole piece 200 is dried, the pole piece 200 is supported by the second air floating assembly 60 .

[0154] Specifically, the direction and the wrap angle of the electrode piece 200 entering the first micro-concave coating component 10 are adjusted by the first adjusting roller assembly 71, the direction and the wrap angle of the electrode piece 200 entering the first glue dispensing component 20 are adjusted by the second adjusting roller assembly 72, the direction and the wrap angle of the electrode piece 200 entering the second micro-concave coating component 30 are adjusted by the third adjusting roller assembly 73, the direction and the wrap angle of the electrode piece 200 entering the second glue dispensing component 40 are positionally limited by the first air flotation assembly 50, and the direction and the wrap angle of the electrode piece 200 entering the oven are positionally limited by the second air flotation assembly 60.

[0155] The double-sided simultaneous micro-concave coating method provided in this embodiment adopts the above-mentioned double-sided simultaneous micro-concave coating device to perform double-sided coating on the electrode 200. The various steps of the entire coating process are closely connected, which reduces the connection time loss between the processes and realizes full-automatic operation without excessive human intervention. The production efficiency and coating quality of the electrode 200 are greatly improved, the errors and uncertainties caused by manual operation are reduced, and the stability and consistency of the coating of the electrode 200 are ensured.

[0156] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0157] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0158] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0159] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0160] Although the present invention is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A double-sided simultaneous micro-concave coating device, characterized in that: include: A first micro-concave coating assembly (10) is used to perform micro-concave coating on a first surface of a pole piece (200); A first glue dispensing component (20) is used to dispense glue on a first surface of the pole piece (200); A second micro-concave coating assembly (30) is used to perform micro-concave coating on the second surface of the pole piece (200); A second glue dispensing component (40) is used to dispense glue on the second surface of the pole piece (200); as well as The oven is used to dry the electrode piece (200).

2. A double-sided simultaneous micro-concave coating device according to claim 1, characterized in that: The first micro-concave coating assembly (10) comprises a first main roller assembly (101), an approach roller assembly (102) and a first scraper assembly (103); the approach roller assembly (102) is arranged in parallel with the first main roller assembly (101); the approach roller assembly (102) approaches or moves away from the first main roller assembly (101) under the drive of a first driving assembly (104); the first scraper assembly (103) is arranged in parallel with the first main roller assembly (101); the first scraper assembly (103) approaches or moves away from the first main roller assembly (101) under the drive of a second driving assembly (105); And / or, the second micro-concave coating assembly (30) includes a second main roller assembly (301) and a second scraper assembly (302), the second scraper assembly (302) is arranged in parallel with the second main roller assembly (301), and the second scraper assembly (302) is driven by a third driving assembly (303) to approach or move away from the second main roller assembly (301).

3. A double-sided simultaneous micro-concave coating device according to claim 2, characterized in that: The first micro-dimpled coating assembly (10) further comprises a first trough assembly (106), wherein the first trough assembly (106) is arranged below the first main roller assembly (101) and parallel to the first main roller assembly (101), and the first trough assembly (106) is driven by a fourth driving assembly (107) to approach or move away from the first main roller assembly (101); And / or, the second micro-concave coating assembly (30) further includes a second material trough assembly (304), the second material trough assembly (304) is arranged below the second main roller assembly (301) and parallel to the second main roller assembly (301), and the second material trough assembly (304) approaches or moves away from the second main roller assembly (301) under the drive of the fifth driving assembly.

4. The double-sided simultaneous micro-concave coating device according to claim 1, characterized in that: The first glue dispensing assembly (20) comprises a first concave roller assembly (201), a third scraper assembly (202) and a sixth drive assembly (205); the third scraper assembly (202) is mounted on a mounting frame (203); the third scraper assembly (202) is arranged in parallel with the first concave roller assembly (201); the third scraper assembly (202) approaches or moves away from the first concave roller assembly (201) under the drive of the seventh drive assembly (204); and the mounting frame (203) approaches or moves away from the pole piece (200) under the drive of the sixth drive assembly (205); And / or, the second dispensing assembly (40) includes a second concave roller assembly (401) and a fourth scraper assembly (402), the fourth scraper assembly (402) is arranged in parallel with the second concave roller assembly (401), and the fourth scraper assembly (402) approaches or moves away from the second concave roller assembly (401) under the drive of the eighth driving assembly (404).

5. A double-sided simultaneous micro-concave coating device according to claim 4, characterized in that: The first concave roller assembly (201) comprises a first central roller (2011) and a plurality of first concave sleeves (2012), wherein the plurality of first concave sleeves (2012) are sleeved on the first central roller (2011) and are arranged in parallel along the radial direction of the first central roller (2011); The third scraper assembly (202) comprises a plurality of first scrapers (2021), each of the first scrapers (2021) being arranged opposite to one of the first gravure sleeves (2012); And / or, the second concave roller assembly (401) comprises a second central roller (4011) and a plurality of second concave sleeves (4012), wherein the plurality of second concave sleeves (4012) are sleeved on the second central roller (4011) and are arranged in parallel along the radial direction of the second central roller (4011); The fourth scraper assembly (402) comprises a plurality of second scrapers (4021), and each of the second scrapers (4021) is arranged opposite to one of the second gravure sleeves (4012).

6. The double-sided simultaneous micro-concave coating device according to claim 4, characterized in that: The first glue dispensing assembly (20) further comprises a third material trough assembly (206), wherein the third material trough assembly (206) is arranged below the first concave roller assembly (201); And / or, the second glue dispensing assembly (40) further includes a fourth material trough assembly, and the fourth material trough assembly is disposed below the second concave roller assembly (401).

7. The double-sided simultaneous micro-concave coating device according to claim 1, characterized in that: It also includes a first air flotation component (50), wherein the first air flotation component (50) is arranged between the second dimple coating component (30) and the second glue dispensing component (40); The first air-floating assembly (50) comprises a first air-floating plate (501), a second air-floating plate (502) and a first adjusting assembly (503); the first air-floating plate (501) and the second air-floating plate (502) are arranged opposite to and in parallel; the first adjusting assembly (503) is respectively connected to the first air-floating plate (501) and / or the second air-floating plate (502) to adjust the distance between the first air-floating plate (501) and the second air-floating plate (502); And / or, further comprising a second air flotation component (60), wherein the second air flotation component (60) is disposed between the second glue dispensing component (40) and the oven; The second air-floating assembly (60) comprises a third air-floating plate, a fourth air-floating plate and a second adjustment assembly, wherein the third air-floating plate and the fourth air-floating plate are arranged opposite to and in parallel, and the second adjustment assembly is respectively connected to the third air-floating plate and / or the fourth air-floating plate to adjust the distance between the third air-floating plate and the fourth air-floating plate.

8. The double-sided simultaneous micro-concave coating device according to claim 1, characterized in that: It also comprises a first adjusting roller assembly (71), wherein the first adjusting roller assembly (71) is arranged at the input end of the first micro-dimpled coating assembly (10) to adjust the direction and wrap angle of the pole piece (200) entering the first micro-dimpled coating assembly (10); And / or, further comprising a second adjusting roller assembly (72), wherein the second adjusting roller assembly (72) is arranged between the first micro-dimpled coating assembly (10) and the first glue dispensing assembly (20) to adjust the direction and wrap angle of the pole piece (200) entering the first glue dispensing assembly (20); And / or, it also includes a third adjustment roller assembly (73), which is arranged between the first dispensing assembly (20) and the second micro-concave coating assembly (30) to adjust the direction and wrap angle of the pole piece (200) entering the second micro-concave coating assembly (30).

9. A double-sided simultaneous micro-concave coating method, characterized in that: The electrode is double-sided coated by the double-sided simultaneous micro-concave coating device according to any one of claims 1 to 8; the method comprises the steps of: Performing micro-dimple coating on the first side of the pole piece; Apply glue to the first side of the electrode; Applying micro-dimpled coating to the second side of the pole piece; Dispense glue on the second side of the pole piece; Dry the electrode.

10. A double-sided simultaneous micro-concave coating method according to claim 9, characterized in that: Before the first surface of the pole piece is subjected to micro-concave coating, the direction and wrap angle of the micro-concave coating on the first surface of the pole piece are adjusted; and / or, before dispensing glue on the first surface of the pole piece, adjusting the direction and wrap angle of dispensing glue on the first surface of the pole piece; and / or, before the second surface of the pole piece is coated with micro-dimples, the direction and wrap angle of the micro-dimple coating on the second surface of the pole piece are adjusted; and / or, before dispensing glue on the second surface of the pole piece, supporting the pole piece by a first air flotation assembly; And / or, before the pole piece is dried, the pole piece is supported by a second air flotation assembly.

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