Coating equipment

Abstract

The utility model provides coating equipment. The coating equipment is used for coating an electrode plate. The coating equipment comprises a rack and a first coating device. The first coating device is installed on the rack and used for coating the first surface of the electrode piece. The first coating device comprises a first base, a first coating roller and a coating head. The first coating roller and the coating head are jointly arranged on the first base. The first coating roller is used for coating the slurry area, the coating head is used for coating the sizing material area, and the slurry area and the sizing material area on the first surface are independently coated through the first coating roller and the coating head, so that the problem of material mixing of the ceramic sizing material and the electrode slurry is effectively avoided; the first base can improve the coating stability of the first coating roller and the coating head during coating.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a coating equipment. Background Art

[0002] Ceramic sizing and electrode paste are usually coated on the electrode plate. When the existing coating equipment coats the ceramic sizing and the electrode paste, the problem of sizing mixing of the ceramic sizing and the electrode paste is likely to occur. Summary of the Utility Model

[0003] The utility model provides a coating equipment to solve the problem that sizing mixing of the ceramic sizing and the electrode paste is likely to occur.

[0004] The utility model provides a coating equipment which is used for coating an electrode plate. The electrode plate includes an adjacent paste area and a sizing area. The coating equipment includes a frame and a first coating device. The first coating device is installed on the frame and is used for coating the first surface of the electrode plate. The first coating device includes a first base, a first coating roller and a coating head. The first coating roller and the coating head are jointly arranged on the first base. The first coating roller is used for coating the paste area, and the coating head is used for coating the sizing area.

[0005] In some embodiments, the coating equipment further includes a second coating device installed on the frame. The second coating device is used for coating the paste area of the second surface of the electrode plate, and the first surface and the second surface are arranged in opposite directions.

[0006] In some embodiments, the coating head is located downstream of the first coating roller along the conveying path of the electrode plate.

[0007] In some embodiments, a first material tank and a receiving cavity are arranged on the first base. The first material tank and the receiving cavity are arranged at intervals. A part of the first coating roller is received in the first material tank, and the other part is located outside the first material tank. The coating head is provided with a discharge port communicated with the receiving cavity.

[0008] In some embodiments, along the conveying path of the electrode plate, the distance between the side of the first material tank close to the downstream and the electrode plate is less than or equal to the distance between the side of the first material tank close to the upstream and the electrode plate.

[0009] In some embodiments, the first coating device further includes a squeegee. The squeegee is connected to the first base and is located at the opening of the first material tank. The end of the squeegee far from the first base abuts against the first coating roller.

[0010] In some embodiments, the squeegee is inclined in a direction away from the bottom of the first material tank.

[0011] In some embodiments, two squeegees are provided, and the first coating roller is located between the two squeegees.

[0012] In some embodiments, the coating direction of the coating head is inclined relative to the electrode sheet.

[0013] In some embodiments, the second coating device includes a second base and a second coating roller. A second material tank is formed on the second base. A part of the second coating roller is received in the second material tank, and another part is located outside the second material tank.

[0014] In some embodiments, the coating equipment further includes a third coating device installed on the frame, and the third coating device is configured to coat the glue material area of the second surface.

[0015] In some embodiments, the third coating device is located downstream of the second coating device along the conveying path of the electrode sheet.

[0016] In some embodiments, along the conveying path of the electrode sheet, the third coating device is located between the first coating roller and the coating head, and the third coating device and the first coating roller are oppositely arranged.

[0017] In some embodiments, the coating equipment further includes a guiding roller installed on the frame. The guiding roller is located upstream of the first coating device along the conveying path of the electrode sheet. The separation point of the guiding roller from the electrode sheet and the contact point of the first coating roller with the electrode sheet are arranged at the same height along the height direction of the coating equipment.

[0018] In some embodiments, the coating equipment further includes an adjusting device installed on the frame. The adjusting device is configured to adjust the height of the guiding roller relative to the first coating roller along the height direction of the coating equipment, and / or the adjusting device is configured to adjust the distance between the guiding roller and the first coating roller along the front-back direction of the coating equipment.

[0019] In some embodiments, the coating equipment further includes a scale provided on the frame, and a pointer pointing to the scale on the scale is provided on the guiding roller.

[0020] In the coating equipment provided by the present utility model, based on the co - setting of the first coating roller and the coating head on the first base, on the one hand, the slurry area and the glue area on the first surface are separately coated by the first coating roller and the coating head, effectively avoiding the problem of cross - mixing of ceramic glue and electrode slurry; on the other hand, the first base can improve the coating stability of the first coating roller and the coating head during coating. On the basis of ensuring that the ceramic glue and the electrode slurry are adjacent after coating, it avoids the problems of overlap or interval during the coating of the ceramic glue and the electrode slurry caused by factors such as mechanical error, installation error, and external disturbance, improving the coating quality of the electrode plate; on the third hand, it can also improve the integration degree of the first coating device, and the position of the first coating roller and the coating head relative to the electrode plate can be adjusted as a whole through the first base, without separately adjusting the positions of the first coating roller and the coating head, reducing the adjustment difficulty and improving the adjustment efficiency. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the coating equipment provided by the embodiment of the present utility model.

[0023] Figure 2 It is a schematic structural diagram of the electrode plate provided by the embodiment of the present utility model.

[0024] Figure 3 It is a schematic structural diagram of the first coating device provided by the embodiment of the present utility model.

[0025] Main reference numerals: Coating equipment 100; Frame 101; First coating device 10; First base 11; First material tank 111; Accommodation cavity 112; First coating roller 121; Scraper 122; Coating head 13; Discharge port 131; Second coating device 20; Second base 21; Second material tank 211; Second coating roller 212; Third coating device 30; Guide roller 411; Adjusting device 412; Scale 421; Pointer 422; Adjusting roller 431; Adjusting member 432; Electrode plate 50; First surface 501; Second surface 502; Coating area 51; Slurry area 511; Glue area 512; Non - coating area 52; Drying device 60.

[0026] The following specific embodiments will further illustrate the present utility model in conjunction with the above - mentioned drawings. Specific Embodiments

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Reference to "embodiment" or "embodiment mode" herein means that a particular feature, structure, or characteristic described in connection with the embodiment or embodiment mode may be included in at least one embodiment of the present utility model. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] It should be noted that the terms in the specification and claims of the present utility model and the above-mentioned accompanying drawings are only for describing specific embodiments, and are not intended to limit the present utility model. The terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish different objects, rather than to describe a specific order. The term "and / or" used in the specification and claims of the present utility model refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0030] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. is a schematic structural diagram of a coating device 100 provided by an embodiment of the present utility model, Figure 2 FIG. is a schematic structural diagram of an electrode sheet 50 provided by an embodiment of the present utility model. An embodiment of the present utility model provides a coating device 100. The coating device 100 is used for coating the electrode sheet 50. The electrode sheet 50 includes a coating area 51 and a non-coating area 52. The coating area 51 and the non-coating area 52 extend along the conveying direction of the electrode sheet 50. The coating area 51 and the non-coating area 52 are adjacent to each other in a direction perpendicular to the conveying direction of the electrode sheet 50. Among them, the non-coating area 52 can be set to two, the coating area 51 can be set to one, and the coating area 51 is arranged between the two non-coating areas 52. In some embodiments, the coating area 51 and the non-coating area 52 can be respectively set to multiple, and the multiple coating areas 51 and the multiple non-coating areas 52 are alternately arranged.

[0031] The coating area 51 includes a paste area 511 and a glue area 512 that are adjacently arranged. The glue area 512 is located between the non - coating area 52 and the paste area 511. Among them, the paste area 511 is used to accommodate the electrode paste. The electrode paste can be the primer paste of the electrode plate 50. The glue area 512 is used to accommodate the ceramic glue. The ceramic glue is used to prevent the electrode plate 50 from short - circuiting when the electrode plate 50 is wound or stacked. In some embodiments, the glue area 512 can be set to two, and the paste area 511 is located between the two glue areas 512. Among them, the electrode plate 50 includes a first surface 501 and a second surface 502. The first surface 501 and the second surface 502 are arranged opposite to each other. Both the first surface 501 and the second surface 502 include a paste area 511 and a glue area 512.

[0032] The coating device 100 includes a frame 101 and a first coating device 10. The first coating device 10 is installed on the frame 101. The first coating device 10 is used to coat the first surface 501 of the electrode plate 50. The first coating device 10 includes a first base 11, a first coating roller 121, and a coating head 13. The first coating roller 121 and the coating head 13 are jointly arranged on the first base 11. The first coating roller 121 is used to coat the paste area 511 on the first surface 501. The coating head 13 is used to coat the glue area 512 on the first surface 501.

[0033] In the coating device 100 provided by the embodiment of the present utility model, based on jointly arranging the first coating roller 121 and the coating head 13 on the first base 11, on the one hand, the paste area 511 and the glue area 512 on the first surface 501 are separately coated by the first coating roller 121 and the coating head 13, effectively avoiding the problem of cross - feeding between the ceramic glue and the electrode paste; on the other hand, the first base 11 can improve the coating stability of the first coating roller 121 and the coating head 13 during coating. On the basis of ensuring that the ceramic glue and the electrode paste are adjacent after coating, it avoids the problems of overlap or separation of the ceramic glue and the electrode paste during coating caused by factors such as mechanical error, installation error, and external disturbance, improving the coating quality of the electrode plate 50; on the third hand, it can also improve the integration degree of the first coating device 10, and the position of the first coating roller 121 and the coating head 13 relative to the electrode plate 50 can be adjusted integrally through the first base 11, without separately adjusting the positions of the first coating roller 121 and the coating head 13, reducing the adjustment difficulty and improving the adjustment efficiency.

[0034] Please refer to Figure 1 and Figure 3, the coating head 13 is located downstream of the first coating roller 121 along the conveying path of the electrode plate 50, that is, the first coating roller 121 is arranged upstream of the coating head 13. Among them, since the ceramic sizing material is located on the side of the electrode paste close to the non-coating area 52, when the electrode paste is coated first and then the ceramic sizing material is coated, the coating of the ceramic sizing material and the coating of the electrode paste can be prevented from interfering with each other, and the problem that the first coating roller 121 touches the ceramic sizing material on the sizing material area 512 when coating the electrode paste can be avoided, thus preventing damage to the ceramic sizing material. The coating head 13 can be configured as a dispensing head. When the coating head 13 is coating, the ceramic sizing material can be extruded in a strip shape, so as to avoid damaging the electrode paste in the paste area 511.

[0035] A first material tank 111 and a receiving cavity 112 are arranged on the first base 11. The first material tank 111 is used to receive the electrode paste. The receiving cavity 112 is used to receive the ceramic sizing material. The first material tank 111 and the receiving cavity 112 are spaced apart and independently arranged, so as to completely avoid the problem of cross-flow of the ceramic sizing material and the electrode paste. A part of the first coating roller 121 is received in the first material tank 111, and the other part is located outside the first material tank 111 and is arranged in contact with the electrode plate 50. When the first coating roller 121 rotates, the electrode paste adheres to the first coating roller 121. When the first coating roller 121 contacts the electrode plate 50, the electrode paste detaches from the first coating roller 121 and adheres to the paste area 511 of the first surface 501. The coating head 13 is provided with a discharge port 131 communicated with the receiving cavity 112. The ceramic sizing material flows out through the discharge port 131 and adheres to the sizing material area 512 of the first surface 501.

[0036] Along the conveying path of the electrode plate 50, the distance between the side of the first material tank 111 close to the downstream and the electrode plate 50 is less than the distance between the side of the first material tank 111 close to the upstream and the electrode plate 50. The opening plane of the first material tank 111 is arranged at an angle to the electrode plate 50. In this way, the moving distance of the electrode paste from the first material tank 111 being carried out by the first coating roller 121 to the contact with the electrode plate 50 can be shortened, the exposure time of the electrode paste in the external environment can be reduced, the surface energy of the electrode paste on the first coating roller 121 can be better maintained moist, so that the electrode paste can better adhere to the electrode plate 50, the peeling strength between the electrode paste and the electrode plate 50 can be improved, the problems of peeling and falling off of the electrode paste can be avoided, and the coating quality can be improved. Among them, Figure 3Taking the shown perspective as an example, the first coating roller 121 can rotate counterclockwise during coating. On the outer axial surface of the first coating roller 121, the arc length corresponding to the separation point P1 between the first coating roller 121 and the first material tank 111 near the upstream side to the contact point P2 between the first coating roller 121 and the electrode plate 50 is greater than the arc length corresponding to the separation point P3 between the first coating roller 121 and the first material tank 111 near the downstream side to the contact point P2 between the first coating roller 121 and the electrode plate 50. In some embodiments, the first coating roller 121 can also rotate clockwise. In some embodiments, the distance between the side of the first material tank 111 near the downstream and the electrode plate 50 can be equal to the distance between the side of the first material tank 111 near the upstream and the electrode plate 50, that is, the opening plane of the first material tank 111 can be arranged parallel to the electrode plate 50.

[0037] The first coating device 10 further includes a squeegee 122. The squeegee 122 is connected to the first base 11 and is located at the opening of the first material tank 111. One end of the squeegee 122 away from the first base 11 abuts against the first coating roller 121. Among them, micro-grooves for accommodating the electrode paste can be provided on the first coating roller 121. The squeegee 122 is used to scrape off the excess electrode paste when the first coating roller 121 rotates, so that the electrode paste is accommodated in the micro-grooves. The separation point between the first coating roller 121 and the first material tank 111 can be the separation point between the first coating roller 121 and the squeegee 122.

[0038] The squeegee 122 is inclined in a direction away from the bottom of the first material tank 111. The bottom of the first material tank 111 is the side of the first material tank 111 far from the opening, that is, the side of the first material tank 111 away from the first coating roller 121. The squeegee 122 can be configured as an elastic plate. The first coating roller 121 can bend the squeegee 122 in the direction towards the bottom of the first material tank 111, thereby increasing the pressing force between the first coating roller 121 and the squeegee 122, improving the scraping effect of the squeegee 122 on the excess electrode paste on the first coating roller 121, and avoiding the problem of leakage of the electrode paste in the first material tank 111. Among them, two squeegees 122 can be provided, and the first coating roller 121 is located between the two squeegees 122. The two squeegees 122 are respectively abutted against the first coating roller 121 to prevent the electrode paste in the first material tank 111 from leaking.

[0039] The coating direction of the coating head 13 is inclined relative to the electrode plate 50. The inclined setting of the coating head 13 can increase the pressure between the ceramic adhesive when extruded and the electrode plate 50, so that the ceramic adhesive adheres more firmly to the electrode plate 50, avoiding the problems of peeling and detachment of the ceramic adhesive.

[0040] In some embodiments, the coating device 100 further includes a second coating device 20 mounted on the frame 101. The second coating device 20 is configured to coat the slurry area 511 on the second surface 502 of the electrode sheet 50.

[0041] In the existing coating device, after coating the first surface of the electrode sheet, it is necessary to dry the electrode sheet, and then coat the second surface opposite to the first surface after the slurry on the first surface is dried. Among them, when drying the first surface after coating the first surface of the electrode sheet, on the one hand, due to the different properties of the first surface and the second surface, the tensions of the two side surfaces of the dried electrode sheet are different, and the electrode sheet is prone to problems such as shrinkage and wrinkling, curling, and cracking; on the other hand, after the electrode sheet is dried, due to the shrinkage of the slurry, it is difficult to align the coating device when coating the slurry on the second surface with the dried slurry on the first surface, and the active materials on both sides of the electrode sheet are prone to misalignment problems after drying the second surface; on the third hand, when drying after coating the second surface is completed, the slurry on the first surface will be dried again, that is, the slurry on the first surface has experienced two drying processes, so that the drying degrees of the active materials on the first surface and the second surface are different, resulting in inconsistent peeling strengths between the active materials and the electrode sheet body; on the fourth hand, the electrode sheet needs to go through two drying processes during coating, resulting in high coating energy consumption and high production cost of the electrode sheet.

[0042] Compared with traditional coating equipment, the coating equipment 100 in the embodiments of the present utility model can coat two opposite surfaces of the electrode sheet 50 simultaneously through the first coating device 10 and the second coating device 20. After the coating of the two surfaces of the electrode sheet 50 is completed, the whole is dried. First, when drying the electrode sheet 50, the properties of the first surface 501 and the second surface 502 are the same and the difference is small. The tensions of the two side surfaces of the dried electrode sheet 50 are the same or similar, avoiding problems such as shrinkage and wrinkling, curling, and cracking of the electrode sheet 50. Second, when coating the first surface 501 and the second surface 502, since the slurry is in a wet state, the first coating device 10 and the second coating device 20 can conveniently align the coating areas when coating the slurry, so that the active materials on both sides of the electrode sheet 50 are in an aligned state after drying, improving the product quality of the electrode sheet 50. Third, after the coating equipment 100 finishes coating, the electrode sheet 50 only needs to go through one drying process. The drying degrees of the active materials on the first surface 501 and the second surface 502 are the same or similar, and the peel strengths of the active materials on both sides of the electrode sheet 50 are the same or similar, improving the consistency of the electrode sheet 50. Fourth, processes such as drying, rewinding, and unwinding after coating the first surface 501 and before coating the second surface 502 are reduced, greatly shortening the coating process flow of the electrode sheet 50, improving the coating efficiency of the electrode sheet 50, and reducing the overall power consumption of the coating equipment 100. Compared with traditional coating equipment, the coating equipment 100 in the embodiments of the present utility model can reduce the energy consumption by more than 40%, greatly reducing the production cost of the electrode sheet 50.

[0043] The second coating device 20 includes a second base 21 and a second coating roller 212. A second material tank 211 is formed on the second base 21. A part of the second coating roller 212 is accommodated in the second material tank 211, and the other part is located outside the second material tank 211. The part of the second coating roller 212 located outside the second material tank 211 is arranged in contact with the electrode sheet 50. When the second coating roller 212 rotates, the electrode slurry in the second material tank 211 adheres to the second coating roller 212. When the electrode slurry rotates with the second coating roller 212 to contact the electrode sheet 50, the electrode slurry detaches from the second coating roller 212 and adheres to the slurry area 511 of the second surface 502. In some embodiments, the second coating device 20 further includes a squeegee. Among them, the structures of the second material tank 211, the second coating roller 212, and the squeegee can be the same as or similar to the structures of the first material tank 111, the first coating roller 121, and the squeegee 122.

[0044] In some embodiments, the coating device 100 further includes a third coating device 30 mounted on the frame 101. The third coating device 30 is used to coat the glue area 512 on the second surface 502 of the electrode sheet 50. The second coating device 20 and the third coating device 30 can coat the slurry area 511 and the glue area 512 on the second surface 502 separately, effectively avoiding the problem of cross-mixing of the ceramic glue and the electrode slurry. Among them, the third coating device 30 is located downstream of the second coating device 20 along the conveying path of the electrode sheet 50, avoiding the problem that the second coating device 20 touches the ceramic glue on the glue area 512 when coating the electrode slurry, and avoiding damage to the ceramic glue. The third coating device 30 can be configured as a dispensing device, and the dispensing device can extrude the ceramic glue in a strip shape, thereby avoiding damage to the electrode slurry in the slurry area 511.

[0045] Along the conveying path of the electrode sheet 50, the third coating device 30 is located between the first coating roller 121 and the coating head 13. When coating the ceramic glue, the third coating device 30 can press the electrode sheet 50 in the direction towards the first coating device 10, keep the electrode sheet 50 located between the first coating roller 121 and the coating head 13 in tension, and keep the electrode sheet 50 in contact with the first coating roller 121, so that the electrode slurry on the first coating roller 121 can adhere to the electrode sheet 50 more effectively, thereby improving the coating quality.

[0046] The third coating device 30 and the first coating roller 121 can be oppositely arranged, and the electrode sheet 50 is located between the third coating device 30 and the first coating roller 121. The third coating device 30 and the first coating roller 121 can be oppositely arranged along the height direction Z of the coating device 100. Among them, the discharge port of the ceramic glue on the third coating device 30 corresponds to the contact point P2 between the first coating roller 121 and the electrode sheet 50, so as to increase the pressing force of the third coating device 30 to press the electrode sheet 50 against the first coating roller 121, so that the electrode slurry on the first coating roller 121 can adhere to the electrode sheet 50 more effectively. Among them, the height direction Z of the coating device 100 can be the direction in which the coating device 100 is far from the ground after the coating device 100 is installed.

[0047] In some embodiments, the coating device 100 further includes at least one guide roller 411 mounted on the frame 101. The guide roller 411 is located upstream of the first coating device 10 along the conveying path of the electrode tab 50. The guide roller 411 can be disposed between the first coating device 10 and the second coating device 20. The guide roller 411 is used to change the conveying direction of the electrode tab 50 and adjust the tension of the electrode tab 50. Wherein, the separation point between the guide roller 411 and the electrode tab 50 and the contact point P2 between the first coating roller 121 and the electrode tab 50 can be arranged at the same height along the height direction Z of the coating device 100. The ground heights of the separation point and the contact point P2 are the same. The portion of the electrode tab 50 located between the corresponding guide roller 411 and the first coating roller 121 extends horizontally. The first coating roller 121 can support the electrode tab 50, reduce the sag effect of the electrode tab 50, and improve the coating effect of the first coating roller 121 and the coating head 13.

[0048] In some embodiments, the coating device 100 further includes an adjusting device 412 mounted on the frame 101. The adjusting device 412 is used to adjust the height of the guide roller 411 relative to the first coating roller 121 along the height direction Z of the coating device 100, and / or, the adjusting device 412 is used to adjust the distance between the guide roller 411 and the first coating roller 121 along the front-back direction X of the coating device 100. Wherein, the front-back direction X of the coating device 100 can be the direction in which the guide roller 411 faces the first coating roller 121. The front-back direction X and the height direction Z can be arranged perpendicular to each other.

[0049] Exemplarily, the adjusting device 412 and the guide roller 411 can be arranged along the height direction Z of the coating device 100. The adjusting device 412 is used to adjust the height of the guide roller 411 relative to the first coating roller 121 along the height direction Z of the coating device 100 to adjust the distance between the electrode tab 50 and the first coating roller 121. In some embodiments, the adjusting device 412 and the guide roller 411 can be arranged along the front-back direction X of the coating device 100. The adjusting device 412 is used to adjust the distance between the guide roller 411 and the first coating roller 121 along the front-back direction X of the coating device 100 to adjust the tension of the electrode tab 50. In some embodiments, the arrangement direction of the adjusting device 412 and the guide roller 411 can form an acute angle with the height direction Z of the coating device 100. When the adjusting device 412 drives the guide roller 411 to move, the distance between the electrode tab 50 and the first coating roller 121 and the distance between the guide roller 411 and the first coating roller 121 along the front-back direction X of the coating device 100 can be adjusted simultaneously.

[0050] In some embodiments, the coating device 100 further includes a scale 421 and a pointer 422. The pointer 422 is fixedly arranged relative to the guiding roller 411. The scale 421 is fixedly arranged relative to the frame 101. When the guiding roller 411 moves relative to the frame 101, the guiding roller 411 drives the pointer 422 to move relative to the scale 421, and the moving distance of the guiding roller 411 relative to the frame 101 can be obtained by reading the value indicated by the pointer 422 on the scale 421.

[0051] In some embodiments, the coating device 100 further includes a drying device 60. The drying device 60 is arranged downstream of the first coating device 10 along the conveying path of the electrode sheet 50. The drying device 60 can be used to dry the electrode sheet 50 after the first coating device 10, the second coating device 20, and the third coating device have completed coating the electrode sheet 50.

[0052] In some embodiments, the coating device 100 further includes an adjusting roller 431. The adjusting roller 431 is arranged along the conveying path of the electrode sheet 50. An adjusting roller 431 can be arranged between the first coating device 10 and the second coating device 20. The adjusting roller 431 is used to change the conveying direction of the electrode sheet 50 and adjust the tension of the electrode sheet 50. The extending directions of the part of the electrode sheet 50 at the second coating device 20 and the part at the first coating device 10 can be set to be different. For example, the part of the electrode sheet 50 at the second coating device 20 can be arranged to extend along the height direction Z of the coating device 100, and the part of the electrode sheet 50 at the first coating device 10 can be arranged to extend along the front-back direction X of the coating device 100.

[0053] In some embodiments, the coating device 100 further includes an adjusting member 432. The adjusting member 432 is used to adjust the setting position of the adjusting roller 431 on the frame 101 so that the adjusting roller 431 adjusts the tension of the electrode sheet 50. The number of adjusting rollers 431 can be set to be multiple. The number of adjusting members 432 corresponds to the number of adjusting rollers 431.

[0054] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A coating device for coating an electrode tab, the electrode tab including an adjacent slurry area and a sizing agent area, characterized in that, Comprising: Frame; A first coating device installed on the frame, the first coating device being used for coating the first surface of the electrode plate. The first coating device includes a first base, a first coating roller, and a coating head. The first coating roller and the coating head are jointly arranged on the first base. The first coating roller is used for coating the slurry area, and the coating head is used for coating the adhesive area.

2. The coating equipment according to claim 1, wherein The coating equipment further includes a second coating device installed on the frame. The second coating device is used for coating the slurry area of the second surface of the electrode plate, and the first surface and the second surface are arranged opposite to each other.

3. The coating device according to claim 1, characterized in that, The coating head is located downstream of the first coating roller along the conveying path of the electrode plate.

4. The coating device according to claim 1, characterized in that, A first material tank and a receiving cavity are arranged on the first base. The first material tank and the receiving cavity are arranged at intervals. A part of the first coating roller is received in the first material tank, and the other part is located outside the first material tank. The coating head is provided with a discharge port communicating with the receiving cavity.

5. The coating device according to claim 4, characterized in that, Along the conveying path of the electrode plate, the distance between the side of the first material tank close to the downstream and the electrode plate is less than or equal to the distance between the side of the first material tank close to the upstream and the electrode plate.

6. The coating device according to claim 4, characterized in that The first coating device further includes a squeegee. The squeegee is connected to the first base and is located at the opening of the first material tank. The end of the squeegee far from the first base abuts against the first coating roller.

7. The coating device according to claim 1, characterized in that, The coating direction of the coating head is inclined relative to the electrode plate.

8. The coating apparatus according to claim 2, wherein The second coating device includes a second base and a second coating roller. A second material tank is formed on the second base. A part of the second coating roller is received in the second material tank, and the other part is located outside the second material tank.

9. The coating device according to claim 2, characterized in that, The coating equipment further includes a third coating device installed on the frame. The third coating device is used for coating the adhesive area of the second surface.

10. The coating device according to claim 9, characterized in that, The third coating device is located downstream of the second coating device along the conveying path of the electrode plate.

11. The coating device according to claim 9, characterized in that, Along the conveying path of the electrode plate, the third coating device is located between the first coating roller and the coating head, and the third coating device and the first coating roller are arranged opposite to each other.

12. The coating device according to claim 1, characterized in that, The coating equipment further includes at least one guide roller installed on the frame. The guide roller is located upstream of the first coating device along the conveying path of the electrode plate. The separation point of the guide roller and the electrode plate and the contact point of the first coating roller and the electrode plate are arranged at the same height along the height direction of the coating equipment.

13. The coating device according to claim 12, characterized in that, The coating equipment further includes an adjusting device installed on the frame. The adjusting device is used for adjusting the height of the guide roller relative to the first coating roller along the height direction of the coating equipment, and / or, the adjusting device is used for adjusting the distance between the guide roller and the first coating roller along the front-back direction of the coating equipment.

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