Gravure and extrusion integrated coating equipment

Abstract

The utility model discloses gravure and extrusion integrated coating equipment which comprises an unwinding mechanism, an A-side gravure coating mechanism, a drying mechanism, a B-side gravure coating mechanism, an extrusion coating mechanism and a winding mechanism, and the winding mechanism, the A-side gravure coating mechanism, the unwinding mechanism, the B-side gravure coating mechanism and the extrusion coating mechanism are sequentially arranged. The drying mechanism is located above the A-side gravure coating mechanism, the unwinding mechanism and the B-side gravure coating mechanism, the unwinding mechanism is used for unwinding the foil, and the A-side gravure coating mechanism is used for coating the A side of the foil with graphite slurry to form an A-side graphite slurry layer; and the B-surface gravure coating mechanism is used for coating a plurality of first coating areas on the B surface of the foil with graphite slurry to form a plurality of B-surface graphite slurry layers. According to the utility model, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coating, in particular to an intaglio extrusion integrated coating device. Background Art

[0002] During the production process of lithium battery cells, it is generally divided into the pole piece production process and the lamination process. Among them, the pole piece production process is generally divided into the coating process and the cutting process. Currently, in the coating process, as Figure 1 shown, generally, an intaglio coating device is first used to coat the A side of the foil 200 with graphite slurry to form an A-side graphite slurry layer, and the graphite slurry is respectively coated on multiple first coating areas 201 on the B side of the foil 200 to form multiple B-side graphite slurry layers. Then, an extrusion coating device is used to coat the ceramic slurry on multiple second coating areas 202 on the B side of the foil 200 (the multiple second coating areas 202 and the multiple first coating areas 201 are alternately arranged along the length direction of the foil 200) respectively to form multiple B-side ceramic slurry layers. In this way, the pole piece can be obtained. The provided B-side ceramic slurry layer can reduce the generation of burrs on the cutting edge of the pole piece and play an insulating role during the subsequent cutting process, that is, when cutting from the second coating area 202 of the foil 200 to obtain multiple small-sized pole pieces, thereby avoiding the short-circuit situation caused by the direct contact between the pole ear of the pole piece and the second coating area 202.

[0003] Since two devices, namely an intaglio coating device and an extrusion coating device, are used to coat the foil 200, after the coating by the intaglio coating device is completed, it is necessary to manually transfer the coated foil 200 to the extrusion coating device, and then the coating operation can be carried out by the extrusion coating device. However, the need for transfer operation will increase the production time of the pole piece, increase the number of production personnel, reduce the production efficiency, and increase the production cost. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an intaglio extrusion integrated coating device, which does not require transfer operation, reduces the production time of the pole piece, can reduce the number of production personnel, improves the production efficiency, and reduces the production cost.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An intaglio extrusion integrated coating device includes an unwinding mechanism, an A-side intaglio coating mechanism, a drying mechanism, a B-side intaglio coating mechanism, an extrusion coating mechanism and a winding mechanism. The winding mechanism, the A-side intaglio coating mechanism, the unwinding mechanism, the B-side intaglio coating mechanism and the extrusion coating mechanism are arranged in sequence. The drying mechanism is located above the A-side intaglio coating mechanism, the unwinding mechanism and the B-side intaglio coating mechanism. The unwinding mechanism is used for unwinding the foil material. The A-side intaglio coating mechanism is used for coating the A side of the foil material with graphite slurry to form an A-side graphite slurry layer. The B-side intaglio coating mechanism is used for respectively coating graphite slurry on multiple first coating areas of the B side of the foil material to form multiple B-side graphite slurry layers. The extrusion coating mechanism is used for respectively coating ceramic slurry on multiple second coating areas of the B side of the foil material to form multiple B-side ceramic slurry layers. The drying mechanism is used for heating and drying the A-side graphite slurry layer of the foil material and for heating and drying the multiple B-side graphite slurry layers and the multiple B-side ceramic slurry layers of the foil material. The winding mechanism is used for winding the foil material.

[0007] As a preferred technical solution, it further includes a feeding tensioning mechanism and a winding tensioning mechanism. The feeding tensioning mechanism is arranged between the A-side intaglio coating mechanism and the unwinding mechanism. The winding tensioning mechanism is arranged between the winding mechanism and the A-side intaglio coating mechanism. The feeding tensioning mechanism and the winding tensioning mechanism are respectively used for tensioning the foil material.

[0008] As a preferred technical solution, the feeding tensioning mechanism and the winding tensioning mechanism are symmetrically arranged. Both the feeding tensioning mechanism and the winding tensioning mechanism include a tensioning frame, a tensioning steel roller and a tensioning rubber pressure roller. The tensioning steel roller and the tensioning rubber pressure roller are both arranged on the tensioning frame. The tensioning steel roller is used for tensioning the foil material. The tensioning rubber pressure roller is located on one side of the tensioning steel roller. The tensioning rubber pressure roller can move in a direction close to or away from the tensioning steel roller. The tensioning rubber pressure roller is used for pressing the foil material against the tensioning steel roller.

[0009] As a preferred technical solution, the unwinding mechanism includes an unwinding frame and an unwinding shaft. The unwinding frame is arranged on the side of the tensioning frame of the feeding tensioning mechanism away from the A-side intaglio coating mechanism. The unwinding shaft is arranged on the unwinding frame. The unwinding shaft is used for unwinding the foil material.

[0010] As a preferred technical solution, the A-side intaglio coating mechanism includes an A-side coating frame, an A-side intaglio roller and an A-side rubber pressure roller. The A-side intaglio roller and the A-side rubber pressure roller are respectively arranged on the A-side coating frame. The A-side rubber pressure roller is located above the A-side intaglio roller. The A-side rubber pressure roller is used for supporting the foil material. The A-side intaglio roller is used for coating the A side of the foil material with graphite slurry to form an A-side graphite slurry layer.

[0011] As a preferred technical solution, the B-side gravure coating mechanism includes a B-side coating rack, a B-side gravure roll, and a B-side rubber pressing roll. The B-side gravure roll and the B-side rubber pressing roll are respectively arranged on the B-side coating rack. The B-side rubber pressing roll is located above the B-side gravure roll. The B-side gravure roll can move in a direction close to or away from the B-side rubber pressing roll. The B-side rubber pressing roll is used to support the foil material, and the B-side gravure roll is used to respectively coat graphite slurry on a plurality of first coating areas on the B side of the foil material to form a plurality of B-side graphite slurry layers.

[0012] As a preferred technical solution, the extrusion coating mechanism includes an extrusion coating rack, an extrusion coating roll, and a coating die head. The extrusion coating roll and the coating die head are respectively arranged on the extrusion coating rack. The extrusion coating roll is used to support the foil material. The coating die head is located on one side of the extrusion coating roll. The coating die head can move in a direction close to or away from the extrusion coating roll. The coating die head is used to respectively coat ceramic slurry on a plurality of second coating areas on the B side of the foil material to form a plurality of B-side ceramic slurry layers.

[0013] As a preferred technical solution, the drying mechanism includes a first oven and a second oven. The first oven is used to heat and dry the graphite slurry layer on the A side of the foil, and the second oven is used to heat and dry multiple graphite slurry layers and multiple ceramic slurry layers on the B side of the foil. The first oven includes a first box body, a lower conveying component for conveying the foil, multiple lower air nozzles, a first upper conveying component for conveying the foil, and multiple first upper air nozzles. There are a first chamber and a second chamber separated from each other in the first box body. The second chamber is located above the first chamber. One end of the first box body is provided with a first opening and a second opening, and the other end of the first box body is provided with a third opening and a fourth opening. The first opening and the third opening are respectively communicated with the first chamber, and the second opening and the fourth opening are respectively communicated with the second chamber. The lower conveying component is arranged in the first chamber, and multiple lower air nozzles are located above the lower conveying component. The multiple lower air nozzles are arranged at intervals along the length direction of the first box body on the top of the first chamber. The first upper conveying component is arranged in the second chamber, and multiple first upper air nozzles are located above the first upper conveying component. The multiple first upper air nozzles are arranged at intervals along the length direction of the first box body on the top of the second chamber. The second oven is located on one side of the first oven. The second oven includes a second box body, a second upper conveying component for conveying the foil, and multiple second upper air nozzles. There is a third chamber in the second box body. One end of the second box body is provided with a fifth opening, and the fifth opening is opposite to the fourth opening. The other end of the second box body is provided with a sixth opening. The fifth opening and the sixth opening are both communicated with the third chamber. The second upper conveying component is arranged in the third chamber, and multiple second upper air nozzles are located above the second upper conveying component. The multiple second upper air nozzles are arranged at intervals along the length direction of the second box body on the top of the third chamber.

[0014] As a preferred technical solution, the winding mechanism includes a winding frame and a winding shaft. The winding shaft is arranged on the winding frame, and the winding shaft is used to wind the foil.

[0015] As a preferred technical solution, a base is provided at the top of the winding and traction mechanism, the A-side gravure coating mechanism, the unwinding and traction mechanism, and the B-side gravure coating mechanism. The drying mechanism is arranged at the top of the base.

[0016] The beneficial effects of the present utility model are as follows: Through the provided unwinding mechanism, A-side gravure coating mechanism, drying mechanism, B-side gravure coating mechanism, extrusion coating mechanism and winding mechanism, the unwinding mechanism can unwind the foil material. The A-side gravure coating mechanism can coat the A side of the foil material with graphite slurry to form an A-side graphite slurry layer. The B-side gravure coating mechanism can coat multiple first coating areas on the B side of the foil material with graphite slurry respectively to form multiple B-side graphite slurry layers. The extrusion coating mechanism can coat multiple second coating areas on the B side of the foil material with ceramic slurry respectively to form multiple B-side ceramic slurry layers. The drying mechanism can heat and dry the A-side graphite slurry layer of the foil material and is used to heat and dry the multiple B-side graphite slurry layers and multiple B-side ceramic slurry layers of the foil material. The winding mechanism can wind the foil material. Compared with the prior art, the coating of the A side of the foil material and the coating of multiple first coating areas and multiple second coating areas on the B side of the foil material of the present utility model can be carried out on the same device, without the need for transfer operations, which can reduce the time for pole piece production, reduce the number of production personnel, improve production efficiency, reduce production costs, and at the same time reduce the floor area of the factory building. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below with reference to the drawings and embodiments.

[0018] Figure 1 is a schematic structural view of the B side of the foil material;

[0019] Figure 2 is a schematic structural view of a gravure extrusion integrated coating device provided by an embodiment of the present utility model;

[0020] Figure 3 is Figure 2 a schematic structural view of the unwinding mechanism and the unwinding and tensioning mechanism of the shown gravure extrusion integrated coating device;

[0021] Figure 4 is Figure 2 a schematic structural view of the A-side gravure coating mechanism of the shown gravure extrusion integrated coating device;

[0022] Figure 5 is Figure 2 a schematic structural view of the B-side gravure coating mechanism and the extrusion coating mechanism of the shown gravure extrusion integrated coating device;

[0023] Figure 6 is Figure 2 a schematic structural view of the drying mechanism of the shown gravure extrusion integrated coating device;

[0024] Figure 7 is Figure 2Schematic diagram of the structure of the winding and tensioning mechanism and the winding mechanism of the intaglio extrusion integrated coating equipment shown. Detailed implementation manners

[0025] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with embodiments and drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all connection / connection relationships involved in the patent do not refer to direct connection of components alone, but refer to more excellent connection structures that can be formed by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the creation of the present utility model can be combined interactively on the premise of not conflicting with each other.

[0026] Please refer to Figure 2 , an intaglio extrusion integrated coating equipment provided by an embodiment of the present utility model includes an unwinding mechanism 10, an unwinding and tensioning mechanism 20, an A-side intaglio coating mechanism 30, a drying mechanism 60, a B-side intaglio coating mechanism 40, an extrusion coating mechanism 50, a winding and tensioning mechanism 70, a winding mechanism 80 and a support base 90. The winding mechanism 80, the A-side intaglio coating mechanism 30, the unwinding mechanism 10, the B-side intaglio coating mechanism 40 and the extrusion coating mechanism 50 are arranged in sequence from left to right. The unwinding and tensioning mechanism 20 is arranged between the A-side intaglio coating mechanism 30 and the unwinding mechanism 10. The winding and tensioning mechanism 70 is arranged between the winding mechanism 80 and the A-side intaglio coating mechanism 30. The support base 90 is arranged between the unwinding mechanism 10 and the B-side intaglio coating mechanism 40. The drying mechanism 60 is located above the A-side intaglio coating mechanism 30, the unwinding and tensioning mechanism 20, the unwinding mechanism 10, the support base 90 and the B-side intaglio coating mechanism 40. In this embodiment, a base 100 is provided at the top of the winding and tensioning mechanism 70, the A-side intaglio coating mechanism 30, the unwinding and tensioning mechanism 20, the support base 90 and the B-side intaglio coating mechanism 40, and the drying mechanism 60 is arranged at the top of the base 100.

[0027] Combined with Figure 3 As shown, the unwinding mechanism 10 is used for unwinding the foil material 200. The unwinding mechanism 10 includes an unwinding frame 11 and an unwinding shaft 12. The unwinding shaft 12 is arranged on the unwinding frame 11, and the unwinding shaft 12 is used for unwinding the foil material 200. The foil material 200 is, for example, aluminum foil or the like.

[0028] The unwinding and tensioning mechanism 20 is used to tension the foil material 200. The unwinding and tensioning mechanism 20 includes a tensioning frame 21, a tensioning steel roller 22, and a tensioning rubber pressure roller 23. The tensioning steel roller 22 and the tensioning rubber pressure roller 23 are both arranged on the tensioning frame 21. The tensioning steel roller 22 is used to tension the foil material 200, and the tensioning rubber pressure roller 23 is used to press the foil material 200 against the tensioning steel roller 22. The tensioning rubber pressure roller 23 is located on one side of the tensioning steel roller 22, for example, on the left side of the tensioning steel roller 22. The tensioning rubber pressure roller 23 can move in a direction close to or away from the tensioning steel roller 22. In actual application, by moving the tensioning rubber pressure roller 23 in a direction close to the tensioning steel roller 22, the foil material 200 can be pressed against the tensioning steel roller 22, so as to avoid situations such as deviation and wrinkling of the foil material 200 and ensure the quality of the foil material 200. The unwinding rack 11 is arranged on the side of the tensioning frame 21 of the unwinding and tensioning mechanism 20 away from the A-side gravure coating mechanism 30.

[0029] Further, the releasing and pulling mechanism 20 further includes a first swing roller 24, a first tension detection roller 25, a second swing roller 26, and a second tension detection roller 27. The first swing roller 24, the first tension detection roller 25, the second swing roller 26, and the second tension detection roller 27 are all arranged on the traction frame 21. The first swing roller 24 can move left and right. The first swing roller 24 is located below the traction steel roller 22. The first tension detection roller 25 is located on the right between the traction steel roller 22 and the first swing roller 24. The first tension detection roller 25 is used to detect the tension of the foil 200. The first swing roller 24 is used to adjust the tension of the foil 200 according to the tension result detected by the first tension detection roller 25. In actual application, the foil 200 bypasses from the left of the first swing roller 24 and from the right of the first tension detection roller 25. When the tension of the foil 200 detected by the first tension detection roller 25 becomes larger, at this time, the first swing roller 24 drives the foil 200 to move to the right, so that the tension of the foil 200 becomes smaller, thus realizing the adjustment of the tension of the foil 200. When the tension of the foil 200 detected by the first tension detection roller 25 becomes smaller, at this time, the first swing roller 24 drives the foil 200 to move to the left, so that the tension of the foil 200 becomes larger, thus realizing the adjustment of the tension of the foil 200. The second tension detection roller 27 is located above the traction steel roller 22. The second swing roller 26 can move left and right. The second swing roller 26 is located on the right between the traction steel roller 22 and the second tension detection roller 27. The second tension detection roller 27 is used to detect the tension of the foil 200. The second swing roller 26 is used to adjust the tension of the foil 200 according to the tension result detected by the second tension detection roller 27. In actual application, the foil 200 bypasses from the right of the second swing roller 26 and from the below of the second tension detection roller 27. When the tension of the foil 200 detected by the second tension detection roller 27 becomes larger, at this time, the second swing roller 26 drives the foil 200 to move to the left, so that the tension of the foil 200 becomes smaller, thus realizing the adjustment of the tension of the foil 200. When the tension of the foil 200 detected by the second tension detection roller 27 becomes smaller, at this time, the second swing roller 26 drives the foil 200 to move to the right, so that the tension of the foil 200 becomes larger, thus realizing the adjustment of the tension of the foil 200. By adjusting the tension of the foil 200, the situation that the foil 200 is slack or broken can be avoided, and the quality of the foil 200 is guaranteed.

[0030] Combined with Figure 4As shown, the A-side gravure coating mechanism 30 is used to coat the A side of the foil 200 with graphite slurry to form an A-side graphite slurry layer. The A-side gravure coating mechanism 30 includes an A-side coating rack 31, an A-side gravure roll 32, and an A-side rubber pressing roll 33. The A-side gravure roll 32 and the A-side rubber pressing roll 33 are respectively arranged on the A-side coating rack 31. The A-side rubber pressing roll 33 is located above the A-side gravure roll 32. The A-side rubber pressing roll 33 is used to support the foil 200, and the A-side gravure roll 32 is used to coat the A side of the foil 200 with graphite slurry in a continuous coating manner to form an A-side graphite slurry layer. During actual coating, the foil 200 passes between the A-side rubber pressing roll 33 and the A-side gravure roll 32. The foil 200 can be supported by the A-side rubber pressing roll 33, and the A-side gravure roll 32 contacts the foil 200, so that the A side of the foil 200 can be coated with graphite slurry. The A side of the foil is, for example, the front side of the foil 200, and the B side of the foil 200 is, for example, the back side of the foil 200.

[0031] Combined with Figure 5 As shown, the B-side gravure coating mechanism 40 is used to coat multiple first coating areas 201 on the B side of the foil 200 with graphite slurry respectively to form multiple B-side graphite slurry layers. The B-side gravure coating mechanism 40 includes a B-side coating rack 41, a B-side gravure roll 42, and a B-side rubber pressing roll 43. The B-side gravure roll 42 and the B-side rubber pressing roll 43 are respectively arranged on the B-side coating rack 41. The B-side rubber pressing roll 43 is located above the B-side gravure roll 42. The B-side gravure roll 42 can move in a direction close to or away from the B-side rubber pressing roll 43, that is, move up and down. The B-side rubber pressing roll 43 is used to support the foil 200, and the B-side gravure roll 42 is used to coat multiple first coating areas 201 on the B side of the foil 200 with graphite slurry in an intermittent coating manner respectively to form multiple B-side graphite slurry layers.

[0032] During actual coating, for example, when the foil 200 is running, the foil 200 bypasses from below the B-side rubber pressure roller 43. When the starting position of the first first coating area 201 of the foil 200 corresponds to the B-side gravure roller 42, the B-side gravure roller 42 moves towards the B-side rubber pressure roller 43, that is, moves upward to contact the foil 200, so that the first first coating area 201 of the foil 200 can be coated with graphite slurry through the B-side gravure roller 42. After the coating is completed, the B-side gravure roller 42 moves away from the B-side rubber pressure roller 43, that is, moves downward to the initial position to separate from the foil 200. In this way, the B-side gravure roller 42 will not coat the second coating area 202 between the first first coating area 201 and the second first coating area 201 of the foil 200. After the foil 200 runs a predetermined distance, when the starting position of the second first coating area 201 of the foil 200 corresponds to the B-side gravure roller 42, the B-side gravure roller 42 moves upward to contact the foil 200, so that the second first coating area 201 of the foil 200 can be coated through the B-side gravure roller 42. By doing so, the B-side gravure roller 42 can coat multiple first coating areas 201 of the foil 200 with graphite slurry respectively.

[0033] The extrusion coating mechanism 50 is used to coat ceramic slurry on multiple second coating areas 202 on the B side of the foil 200 respectively to form multiple B-side ceramic slurry layers. The extrusion coating mechanism 50 includes an extrusion coating rack 51, an extrusion coating roller 52, and a coating die head 53. The extrusion coating roller 52 and the coating die head 53 are respectively arranged on the extrusion coating rack 51. The extrusion coating roller 52 is used to support the foil 200. The coating die head 53 is located on one side of the extrusion coating roller 52, for example, on the right side of the extrusion coating roller 52. The coating die head 53 can move in a direction close to or away from the extrusion coating roller 52. The coating die head 53 is used to coat ceramic slurry on multiple second coating areas 202 on the B side of the foil 200 respectively to form multiple B-side ceramic slurry layers. During actual coating, when the foil 200 is running, the foil 200 bypasses from the right side of the extrusion coating roller 52. When the starting position of the first second coating area 202 of the foil 200 corresponds to the coating die head 53, the coating die head 53 moves in a direction close to the extrusion coating roller 52 to contact the foil 200, so that the first second coating area 202 can be coated through the coating die head 53. After coating, the coating die head 53 moves in a direction away from the extrusion coating roller 52 to separate from the foil 200, so that the second first coating area 201 of the foil 200 will not be coated by the coating die head 53. When the starting position of the second second coating area 202 corresponds to the coating die head 53, the coating die head 53 moves in a direction close to the extrusion coating roller 52 to contact the foil 200, so that the second second coating area 202 can be coated through the coating die head 53. By doing so, the coating die head 53 can coat ceramic slurry on multiple second coating areas 202 of the foil 200 respectively.

[0034] Combined Figure 6 As shown, the drying mechanism 60 is used to heat and dry the graphite slurry layer on the A side of the foil 200 and to heat and dry multiple graphite slurry layers and multiple B-side ceramic slurry layers on the B side of the foil 200. The drying mechanism 60 includes a first oven 61 and a second oven 62. The first oven 61 is used to heat and dry the graphite slurry layer on the A side of the foil 200, and the second oven 62 is used to heat and dry multiple graphite slurry layers and multiple B-side ceramic slurry layers on the B side of the foil 200.

[0035] The first oven 61 includes a first box body 611, a lower conveying component for conveying the foil 200, multiple lower air nozzles, a first upper conveying component for conveying the foil 200, and multiple first upper air nozzles.

[0036] The first box body 611 is arranged at the top of the base 100. The first box body 611 has a first chamber and a second chamber separated from each other. The second chamber is located above the first chamber. One end of the first box body 611 is provided with a first opening and a second opening, and the other end of the first box body 611 is provided with a third opening and a fourth opening. The first opening and the third opening are respectively communicated with the first chamber, and the second opening and the fourth opening are respectively communicated with the second chamber.

[0037] The lower conveying assembly is arranged in the first chamber. In this embodiment, the lower conveying assembly includes a plurality of lower conveying rollers 612. The plurality of lower conveying rollers 612 are arranged at intervals along the length direction of the first box body 611, and the number of the lower conveying rollers 612 can be set according to actual conditions. In actual application, the foil 200 passes above the plurality of lower conveying rollers 612, and the plurality of lower conveying rollers 612 can support the foil 200 and realize the conveying of the foil 200 by the rotation of the plurality of lower conveying rollers 612.

[0038] A plurality of lower air nozzles are located above the lower conveying assembly. The plurality of lower air nozzles are arranged at intervals along the length direction of the first box body 611 at the top of the first chamber, and the number of the lower air nozzles can be set according to actual conditions. In actual application, hot air is blown on the A surface of the foil 200 through the plurality of lower air nozzles, so as to realize the heating and drying of the graphite slurry layer on the A surface of the foil 200.

[0039] The first upper conveying assembly is arranged in the second chamber. In this embodiment, the first upper conveying assembly includes a plurality of first upper conveying rollers 613. The plurality of first upper conveying rollers 613 are arranged at intervals along the length direction of the first box body 611, and the number of the first upper conveying rollers 613 can be set according to actual conditions. In actual application, the foil 200 passes above the plurality of first upper conveying rollers 613, and the plurality of first upper conveying rollers 613 can support the foil 200 and realize the conveying of the foil 200 by the rotation of the plurality of first upper conveying rollers 613.

[0040] A plurality of first upper air nozzles are located above the first upper conveying assembly. The plurality of first upper air nozzles are arranged at intervals along the length direction of the first box body 611 at the top of the second chamber, and the number of the first upper air nozzles can be set according to actual conditions. In actual application, hot air is blown on the B surface of the foil 200 through the plurality of first upper air nozzles, so as to realize the heating and drying of the plurality of graphite slurry layers and the plurality of ceramic slurry layers on the B surface of the foil 200.

[0041] In this embodiment, there are a plurality of first ovens 61, for example, three. The three first ovens 61 are arranged in sequence from left to right. It can be understood that the number of the first ovens 61 can be other numbers, such as one, two, etc., and can be set according to actual conditions.

[0042] The second oven 62 is located on one side of the first oven 61, for example, on the right side of the first oven 61. In this embodiment, the second oven 62 is close to the third first oven 61. The second oven 62 includes a second box body 621, a second upper conveying assembly for conveying the foil 200, and a plurality of second upper air nozzles. The second box body 621 is arranged at the top of the base 100.

[0043] The second box body 621 has a third chamber. One end of the second box body 621 is provided with a fifth opening, which is opposite to the fourth opening. The other end of the second box body 621 is provided with a sixth opening, and both the fifth opening and the sixth opening communicate with the third chamber.

[0044] The second upper conveying assembly is arranged in the third chamber. In this embodiment, the second upper conveying assembly includes a plurality of second upper conveying rollers 622. The plurality of second upper conveying rollers 622 are arranged at intervals along the length direction of the second box body 621, and the number of the second upper conveying rollers 622 can be set according to the actual situation. In actual application, the foil 200 passes above the plurality of second upper conveying rollers 622, and the plurality of second upper conveying rollers 622 can support the foil 200 and realize the conveyance of the foil 200 by the rotation of the plurality of second upper conveying rollers 622.

[0045] The plurality of second upper air nozzles are located above the second upper conveying assembly. The plurality of second upper air nozzles are arranged at intervals along the length direction of the second box body 621 at the top of the third chamber, and the number of the second upper air nozzles can be set according to the actual situation. By blowing hot air on the B surface of the foil 200 through the plurality of second upper air nozzles, the heating and drying of the plurality of B surface graphite slurry layers and the plurality of B surface ceramic slurry layers of the foil 200 can be realized.

[0046] Combined Figure 7 As shown in the figure, the winding and pulling mechanism 70 is used to pull the foil 200. The winding and pulling mechanism 70 and the unwinding and pulling mechanism 20 are symmetrically arranged left and right, and their structures are the same, so the structure of the winding and pulling mechanism 70 will not be described in detail here.

[0047] The winding mechanism 80 is used to wind the foil 200. The winding mechanism 80 includes a winding frame 81 and a winding shaft 82. The winding shaft 82 is arranged on the winding frame 81, and the winding shaft 82 is used to wind the foil 200.

[0048] In this embodiment, the base 100 is arranged at the top of the traction frame 21 of the winding and pulling mechanism 70, the A surface coating frame 31 of the A surface gravure coating mechanism 30, the traction frame 21 of the unwinding and pulling mechanism 20, the support seat 90, and the B surface coating frame 41 of the B surface gravure coating mechanism 40.

[0049] In practical application of the utility model, the foil material 200 is unrolled by the unrolling shaft 12. The unrolled foil material 200 successively bypasses from the left side of the first swing roller 24 of the unrolling and tensioning mechanism 20, from the right side of the first tension detection roller 25 of the unrolling and tensioning mechanism 20, from the left side of the traction steel roller 22 of the unrolling and tensioning mechanism 20, from the right side of the second swing roller 26 of the unrolling and tensioning mechanism 20, and from below the second tension detection roller 27 of the unrolling and tensioning mechanism 20, and then passes between the A-side rubber pressing roller 33 and the A-side gravure roller 32. The traction steel roller 22 of the unrolling and tensioning mechanism 20 can traction the foil material 200. The traction rubber pressing roller 23 of the unrolling and tensioning mechanism 20 can press the foil material 200 onto the traction steel roller 22 to avoid situations such as deviation and wrinkling of the foil material 200. The first tension detection roller 25 and the second tension detection roller 27 of the unrolling and tensioning mechanism 20 can respectively detect the tension of the foil material 200. The first swing roller 24 of the unrolling and tensioning mechanism 20 can adjust the tension of the foil material 200 according to the tension result detected by the first tension detection roller 25. The second swing roller 26 of the unrolling and tensioning mechanism 20 can adjust the tension of the foil material 200 according to the tension result detected by the second tension detection roller 27 to avoid situations such as slack or breakage of the foil material 200. The A-side rubber pressing roller 33 can support the foil material 200. The A-side gravure roller 32 can coat the A side of the foil material 200 with graphite slurry to form an A-side graphite slurry layer.

[0050] Then, the foil 200 enters the first chamber through the first opening of the first box body 611, passes above a plurality of lower conveying rollers 612, and then exits through the third opening of the first box body 611. The foil 200 can be conveyed by the plurality of lower conveying rollers 612, and hot air can be blown onto the A side of the foil 200 through a plurality of lower air nozzles, so as to heat and dry the graphite slurry layer on the A side of the foil 200. Then, the foil 200 bypasses below the B-side rubber pressing roller 43 in sequence and bypasses the right side of the extrusion coating roller 52. The B-side rubber pressing roller 43 can support the foil 200, and the B-side gravure roller 42 can respectively coat graphite slurry on a plurality of first coating areas 201 on the B side of the foil 200 to form a plurality of B-side graphite slurry layers. The extrusion coating roller 52 can support the foil 200, and the coating die head 53 can respectively coat ceramic slurry on a plurality of second coating areas 202 on the B side of the foil 200 to form a plurality of B-side ceramic slurry layers. Then, the foil 200 enters the third chamber through the sixth opening of the second box body 621, passes above a plurality of second upper conveying rollers 622, and then exits through the fifth opening of the second box body 621. Then, it enters the second chamber through the fourth opening of the first box body 611, passes above a plurality of first upper conveying rollers 613, and then exits through the second opening of the first box body 611. The foil 200 can be conveyed by the plurality of second upper conveying rollers 622 and the plurality of first upper conveying rollers 613, and hot air can be blown onto the B side of the foil 200 through a plurality of second upper air nozzles and a plurality of first upper air nozzles, so as to heat and dry the plurality of B-side graphite slurry layers and the plurality of B-side ceramic slurry layers on the B side of the foil 200. Then, the foil 200 bypasses below the second tension detection roller 27 of the winding and traction mechanism 70 in sequence, bypasses the left side of the second swing roller 26 of the winding and traction mechanism 70, bypasses the right side of the traction steel roller 22 of the winding and traction mechanism 70, bypasses the left side of the first tension detection roller 25 of the winding and traction mechanism 70, and bypasses the right side of the first swing roller 24 of the winding and traction mechanism 70, and then is wound on the winding shaft 81. The traction steel roller 22 of the winding and traction mechanism 70 can traction the foil 200, and the traction rubber pressing roller 23 of the winding and traction mechanism 70 can press the foil 200 against the traction steel roller 22 to prevent the foil 200 from running off or wrinkling. The first tension detection roller 25 and the second tension detection roller 27 of the winding and traction mechanism 70 can respectively detect the tension of the foil 200. The first swing roller 24 of the winding and traction mechanism 70 can adjust the tension of the foil 200 according to the tension result detected by the first tension detection roller 25 to prevent the foil 200 from being slack or broken. The second swing roller 26 of the winding and traction mechanism 70 can adjust the tension of the foil 200 according to the tension result detected by the second tension detection roller 27 to prevent the foil 200 from being slack or broken. The winding shaft 81 can wind the foil 200, and thus the pole piece can be obtained.

[0051] The utility model is provided with an unwinding mechanism 10, an A-side gravure coating mechanism 30, a drying mechanism 60, a B-side gravure coating mechanism 40, an extrusion coating mechanism 50 and a winding mechanism 80. The unwinding mechanism 10 can unwind the foil 200. The A-side gravure coating mechanism 30 can coat the A side of the foil 200 with graphite slurry to form an A-side graphite slurry layer. The B-side gravure coating mechanism 40 can respectively coat the plurality of first coating areas 201 on the B side of the foil 200 with graphite slurry to form a plurality of B-side graphite slurry layers. The extrusion coating mechanism 50 can respectively coat the plurality of second coating areas 202 on the B side of the foil 200 with ceramic slurry to form a plurality of B-side ceramic slurry layers. The drying mechanism 60 can heat and dry the A-side graphite slurry layer of the foil 200 and is used to heat and dry the plurality of B-side graphite slurry layers and the plurality of B-side ceramic slurry layers of the foil 200. The winding mechanism 80 can wind the foil 200. Compared with the prior art, the coating of the A side of the foil 200 and the coating of the plurality of first coating areas 201 and the plurality of second coating areas 202 on the B side of the foil 200 of the utility model can be carried out on the same device, without the need for transfer operations, which can reduce the time for pole piece production, reduce the number of production personnel, improve production efficiency, reduce production costs, and at the same time reduce the floor area of the factory building. The provided drying mechanism 60 can not only heat and dry the A-side graphite slurry layer of the foil 200, but also heat and dry the plurality of B-side graphite slurry layers and the plurality of B-side ceramic layers on the B side of the foil 200, which can reduce the volume of the device, thereby further reducing the floor area of the factory building.

[0052] The above is a specific description of the preferred embodiment of the utility model, but the utility model creation is not limited to the above embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the utility model, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An intaglio extrusion integrated coating device, characterized in that, It includes an unwinding mechanism, an A-side gravure coating mechanism, a drying mechanism, a B-side gravure coating mechanism, an extrusion coating mechanism and a winding mechanism. The winding mechanism, the A-side gravure coating mechanism, the unwinding mechanism, the B-side gravure coating mechanism and the extrusion coating mechanism are arranged in sequence. The drying mechanism is located above the A-side gravure coating mechanism, the unwinding mechanism and the B-side gravure coating mechanism. The unwinding mechanism is used for unwinding the foil material. The A-side gravure coating mechanism is used for coating the A side of the foil material with graphite slurry to form an A-side graphite slurry layer. The B-side gravure coating mechanism is used for respectively coating the graphite slurry on multiple first coating areas on the B side of the foil material to form multiple B-side graphite slurry layers. The extrusion coating mechanism is used for respectively coating the ceramic slurry on multiple second coating areas on the B side of the foil material to form multiple B-side ceramic slurry layers. The drying mechanism is used for heating and drying the A-side graphite slurry layer of the foil material and for heating and drying the multiple B-side graphite slurry layers and the multiple B-side ceramic slurry layers of the foil material. The winding mechanism is used for winding the foil material.

2. The gravure extrusion integrated coating equipment according to claim 1, wherein, It further includes an unwinding tensioning mechanism and a winding tensioning mechanism. The unwinding tensioning mechanism is arranged between the A-side gravure coating mechanism and the unwinding mechanism. The winding tensioning mechanism is arranged between the winding mechanism and the A-side gravure coating mechanism. The unwinding tensioning mechanism and the winding tensioning mechanism are respectively used for tensioning the foil material.

3. The gravure extrusion integrated coating equipment according to claim 2, characterized in that, The unwinding tensioning mechanism and the winding tensioning mechanism are symmetrically arranged. Both the unwinding tensioning mechanism and the winding tensioning mechanism include a tensioning frame, a tensioning steel roller and a tensioning rubber pressure roller. The tensioning steel roller and the tensioning rubber pressure roller are both arranged on the tensioning frame. The tensioning steel roller is used for tensioning the foil material. The tensioning rubber pressure roller is located on one side of the tensioning steel roller. The tensioning rubber pressure roller can move in a direction close to or away from the tensioning steel roller. The tensioning rubber pressure roller is used for pressing the foil material against the tensioning steel roller.

4. The gravure extrusion integrated coating equipment according to claim 3, characterized in that, The unwinding mechanism includes an unwinding frame and an unwinding shaft. The unwinding frame is arranged on the side of the tensioning frame of the unwinding tensioning mechanism away from the A-side gravure coating mechanism. The unwinding shaft is arranged on the unwinding frame. The unwinding shaft is used for unwinding the foil material.

5. The gravure extrusion integrated coating equipment according to claim 1, characterized in that, The A-side gravure coating mechanism includes an A-side coating frame, an A-side gravure roller and an A-side rubber pressure roller. The A-side gravure roller and the A-side rubber pressure roller are respectively arranged on the A-side coating frame. The A-side rubber pressure roller is located above the A-side gravure roller. The A-side rubber pressure roller is used for supporting the foil material. The A-side gravure roller is used for coating the A side of the foil material with graphite slurry to form an A-side graphite slurry layer.

6. The gravure extrusion integrated coating equipment according to claim 1, wherein, The B-side gravure coating mechanism includes a B-side coating frame, a B-side gravure roller and a B-side rubber pressure roller. The B-side gravure roller and the B-side rubber pressure roller are respectively arranged on the B-side coating frame. The B-side rubber pressure roller is located above the B-side gravure roller. The B-side gravure roller can move in a direction close to or away from the B-side rubber pressure roller. The B-side rubber pressure roller is used for supporting the foil material. The B-side gravure roller is used for respectively coating the graphite slurry on multiple first coating areas on the B side of the foil material to form multiple B-side graphite slurry layers.

7. The gravure extrusion integrated coating equipment according to claim 1, characterized in that, The extrusion coating mechanism includes an extrusion coating rack, an extrusion coating roller, and a coating die head. The extrusion coating roller and the coating die head are respectively arranged on the extrusion coating rack. The extrusion coating roller is used to support the foil material, and the coating die head is located on one side of the extrusion coating roller. The coating die head can move in a direction close to or away from the extrusion coating roller, and the coating die head is used to coat ceramic slurry on multiple second coating areas on the B side of the foil material to form multiple B-side ceramic slurry layers.

8. The gravure extrusion integrated coating equipment according to claim 1, characterized in that, The drying mechanism includes a first oven and a second oven. The first oven is used to heat and dry the A-side graphite slurry layer of the foil material, and the second oven is used to heat and dry the multiple B-side graphite slurry layers and the multiple B-side ceramic slurry layers of the foil material. The first oven includes a first box body, a lower conveying component for conveying the foil material, multiple lower air nozzles, a first upper conveying component for conveying the foil material, and multiple first upper air nozzles. The first box body has a first chamber and a second chamber separated from each other, and the second chamber is located above the first chamber. One end of the first box body is provided with a first opening and a second opening, and the other end of the first box body is provided with a third opening and a fourth opening. The first opening and the third opening are respectively communicated with the first chamber, and the second opening and the fourth opening are respectively communicated with the second chamber. The lower conveying component is arranged in the first chamber, and multiple lower air nozzles are located above the lower conveying component. The multiple lower air nozzles are arranged at intervals along the length direction of the first box body on the top of the first chamber. The first upper conveying component is arranged in the second chamber, and multiple first upper air nozzles are located above the first upper conveying component. The multiple first upper air nozzles are arranged at intervals along the length direction of the first box body on the top of the second chamber. The second oven is located on one side of the first oven. The second oven includes a second box body, a second upper conveying component for conveying the foil material, and multiple second upper air nozzles. The second box body has a third chamber. One end of the second box body is provided with a fifth opening, and the fifth opening is opposite to the fourth opening. The other end of the second box body is provided with a sixth opening. The fifth opening and the sixth opening are both communicated with the third chamber. The second upper conveying component is arranged in the third chamber, and multiple second upper air nozzles are located above the second upper conveying component. The multiple second upper air nozzles are arranged at intervals along the length direction of the second box body on the top of the third chamber.

9. The gravure extrusion integrated coating equipment according to claim 1, characterized in that The winding mechanism includes a winding rack and a winding shaft. The winding shaft is arranged on the winding rack, and the winding shaft is used to wind the foil material.

10. The gravure extrusion integrated coating equipment according to claim 2, characterized in that, A base is provided at the top of the winding and traction mechanism, the A-side gravure coating mechanism, the unwinding and traction mechanism, and the B-side gravure coating mechanism, and the drying mechanism is arranged at the top of the base.

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