Lithium battery coating and drying integrated equipment and method

Abstract

The invention relates to the technical field of lithium battery production and processing, and discloses lithium battery coating and drying integrated equipment and method.The lithium battery coating and drying integrated equipment is characterized in that a conveying roller is arranged in an input mechanism and used for conveying metal foil; output rollers and a drying mechanism are arranged in the output mechanism, the output rollers are used for outputting the coated metal foil, and the drying mechanism is arranged between the adjacent output rollers and used for drying the coated metal foil; the coating mechanism is detachably connected between the input mechanism and the output mechanism in a butt joint mode and comprises a first liquid storage box and a second liquid storage box which are oppositely arranged on the upper side and the lower side of the metal foil, coating liquid and corresponding coating rollers are stored in each liquid storage box, and the two sets of coating rollers are used for clamping the metal foil and conducting coating work. The two sets of coating rollers synchronously coat the upper side face and the lower side face of the metal foil with coating liquid, and synchronous coating work on the two faces of the metal foil at the same station is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production and processing, and in particular to a lithium battery coating and drying integrated device and method. Background Art

[0002] In the production process of lithium batteries, the coating process is a key step in uniformly coating one or more layers of active materials on the current collector (such as copper foil or aluminum foil). This step directly affects the performance of lithium batteries, such as energy density, cycle life and safety. The wet film after coating needs to be dried quickly to remove the solvent to avoid the impact of solvent residue on battery performance. Traditional coating and drying equipment are often separate. After coating is completed, the wet film needs to go through multiple links such as transmission and transfer before it can enter the drying equipment. During this process, the wet film is easily contaminated, scratched or deformed, which affects the quality of the final product. In addition, separate equipment not only increases production costs, but also takes up more production space. Although there have been some attempts to integrate coating and drying functions, these devices often have certain defects.

[0003] The prior art discloses a coating and drying device for lithium battery composite diaphragm, which includes an operating table and a diaphragm. Although the device can coat and dry metal foil, it can only coat one side, so the coating efficiency is low.

[0004] In addition, the prior art also discloses a double-sided coating and drying device for the production of lithium battery motor sheets. When the device is in operation, although it can coat both sides of the metal foil, it pre-coats one side and then coats the other side of the metal foil. Since the coating is not performed simultaneously, the coating process and the coating difficulty are increased, and the coating efficiency is reduced. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an integrated coating and drying equipment and method for lithium batteries. Two sets of coating rollers synchronously apply the coating liquid to the upper and lower sides of the metal foil, realizing the synchronous coating of both sides of the metal foil at the same workstation.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, a lithium battery coating and drying integrated device comprises:

[0008] An input mechanism with a conveying roller inside for conveying metal foil;

[0009] The output mechanism includes an output roller and a drying mechanism, wherein the output roller is used to output the coated metal foil, and the drying mechanism is provided between adjacent output rollers and is used to dry the coated metal foil;

[0010] The coating mechanism is detachably connected between the input mechanism and the output mechanism, and includes a first liquid storage box and a second liquid storage box relatively arranged on the upper and lower sides of the metal foil. Each liquid storage box contains coating liquid and a corresponding coating roller. The two sets of coating rollers are used to clamp the metal foil and perform coating work.

[0011] As a further implementation method, both sides of the first liquid storage box and the second liquid storage box are provided with insertion rods, the input mechanism includes a first base frame, the output mechanism includes a second base frame, and a positioning plate is provided on the opposite side of the first base frame and the second base frame, and the liquid storage box is inserted into the positioning plate through the insertion rod.

[0012] As a further implementation method, a first coating roller is provided inside the first liquid storage box, an opening is provided at the bottom of the first liquid storage box, the first coating roller is rotatably connected to the opening, and a second motor is provided on the outside of the first liquid storage box for driving the first coating roller, and the bottom end of the first coating roller is lower than the bottom surface of the first liquid storage box.

[0013] As a further implementation, a second coating roller is rotatably provided in the second liquid storage box, and the top end of the second coating roller is higher than the top surface of the second liquid storage box.

[0014] As a further implementation method, scrapers are provided at the bottom of the first liquid storage box and the top of the second liquid storage box, the bottom end of the scraper on the first liquid storage box is flush with the bottom end of the first coating roller, and the top end of the scraper on the second liquid storage box is flush with the top end of the second coating roller.

[0015] As a further implementation method, the conveying roller is arranged inside the first base frame, and the conveying roller includes a first guide roller, a first drive roller and a second guide roller arranged in sequence. The first drive roller is lower than the first guide roller and the second guide roller, and the height of the second guide roller is set corresponding to the two groups of coating rollers.

[0016] As a further implementation method, the output roller is arranged inside the second base frame, and the output roller includes a third guide roller, a tensioning roller, a fourth guide roller and a second drive roller arranged in sequence; the third guide roller, the fourth guide roller and the second drive roller are at the same height, and the tensioning roller is lower than the third guide roller.

[0017] As a further implementation, the drying mechanism is correspondingly arranged between the fourth guide roller and the second driving roller.

[0018] As a further implementation method, the drying mechanism includes a blower arranged on the outside of the second base frame, a heating wire is provided in the blower, and also includes a pair of air guide plates arranged between the fourth guide roller and the second drive roller, the air guide plates are provided with nozzles, the blower is connected to the air guide plates through an air pipe, and the two air guide plates are correspondingly arranged on the upper and lower sides of the metal foil.

[0019] In a second aspect, a method for operating a lithium battery coating and drying integrated device is provided, using any of the above-described lithium battery coating and drying integrated devices, comprising the following steps:

[0020] The input mechanism continuously transports the metal foil to the coating mechanism through the conveying roller. The first liquid storage box and the second liquid storage box store the coating liquid. The coating rollers on the liquid storage box rotate to bring the coating liquid into contact with the coating rollers. The two sets of coating rollers clamp the metal foil and perform the coating work; the coated metal foil is output by the output roller in the output mechanism and is dried by the drying mechanism at the same time.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The coating mechanism of the present invention is detachably docked between the input mechanism and the output mechanism, and includes a first liquid storage box and a second liquid storage box that are relatively arranged on the upper and lower sides of the metal foil. When the metal foil passes through the coating rollers of the liquid storage boxes, the two sets of coating rollers synchronously apply the coating liquid to the upper and lower side surfaces of the metal foil, thereby realizing the synchronous coating of both sides of the metal foil at the same work station; at the same time, when the coating mechanism needs to be replaced, the coating mechanism can be quickly disassembled and replaced with a different type of coating mechanism.

[0023] 2. The liquid storage box of the present invention is connected to the positioning plate through an insertion rod, which can quickly install and replace the coating mechanism. After the coating mechanism is disassembled, the input mechanism, coating mechanism and output mechanism are changed from a connected state to a separated state, which is convenient for maintenance of different mechanisms.

[0024] 3. A liquid level sensor is provided in the liquid storage chamber of the present invention, and when the coating liquid level is lower than the set level, the coating liquid can be automatically added.

[0025] 4. The guide roller and coating roller of the present invention are both positioned at the same height, ensuring that the metal foil is horizontal when deployed within the coating mechanism, ensuring effective coating. The scraper is configured to evenly distribute the coating liquid on the metal foil, improving coating efficiency while also reducing coating liquid waste. Excess coating liquid on the bottom surface of the metal foil is scraped back into the second liquid reservoir by the scraper, while excess coating liquid on the top surface is scraped back, ensuring that the coating liquid always remains above the metal foil at the coating location. The two scrapers ensure uniform distribution of coating liquid across the metal foil. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1Schematic diagram of the overall structure of the coating and drying integrated equipment in an embodiment of the present invention;

[0028] Figure 2 This is an axonometric diagram of the coating and drying integrated device according to an embodiment of the present invention;

[0029] Figure 3 is a cross-sectional view of an integrated coating and drying device according to an embodiment of the present invention;

[0030] Figure 4 is a structural exploded diagram of the input structure in an embodiment of the present invention;

[0031] Figure 5 This is an exploded view of the first structure of the coating mechanism in an embodiment of the present invention;

[0032] Figure 6 This is an exploded view of the second structure of the coating mechanism in an embodiment of the present invention;

[0033] Figure 7 It is a structural exploded diagram of the output mechanism in an embodiment of the present invention.

[0034] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0035] Among them: 1. input mechanism, 11. first base frame, 12. first positioning plate, 13. first guide roller, 14. first drive roller, 15. second guide roller, 16. first motor; 2. coating mechanism, 21. first liquid storage box, 22. third motor, 23. first liquid storage chamber, 24. first coating roller, 25. insertion rod, 26. second motor, 27. second liquid storage box, 28. second coating roller, 29. scraper, 210. second liquid storage chamber; 3. output mechanism, 31. second base frame, 32. second positioning plate, 33. third guide roller, 34. tensioning roller, 35. fourth guide roller, 36. second drive roller, 37. fourth motor, 38. air guide plate, 39. nozzle, 310. blower, 311. air pipe. DETAILED DESCRIPTION

[0036] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0037] Example 1

[0038] In a typical embodiment of the present invention, referring to Figure 1-Figure 7 As shown, a lithium battery coating and drying integrated device includes an input mechanism 1, a coating mechanism 2 and an output mechanism 3 arranged in sequence.

[0039] The input mechanism 1 is provided with a conveying roller for conveying the metal foil; the output mechanism 3 is provided with an output roller and a drying mechanism. The output roller is used to output the coated metal foil, and the drying mechanism is provided between adjacent output rollers for drying the coated metal foil.

[0040] The coating mechanism 2 is detachably docked between the input mechanism 1 and the output mechanism 3, and includes a first liquid storage box 21 and a second liquid storage box 27 arranged on the upper and lower sides of the metal foil. Each liquid storage box contains coating liquid and a corresponding coating roller. The two sets of coating rollers are used to clamp the metal foil and perform coating work.

[0041] like Figure 4 As shown, the input mechanism 1 includes a first base frame 11 , a first positioning plate 12 , a first guide roller 13 , a first driving roller 14 , a second guide roller 15 and a first motor 16 .

[0042] The first base frame 11 is a box structure. There are paired guide rollers and a single drive roller inside the first base frame 11. The guide rollers and the drive rollers include a first guide roller 13, a first drive roller 14, and a second guide roller 15. The left and right sides of the first base frame 11 are open, which serve as the inlet and outlet of the metal foil respectively. The first guide roller 13 is arranged near the left opening to guide the metal foil entering the first base frame 11. The second guide roller 15 is arranged near the right opening to guide the metal foil from the right outlet to the coating mechanism 2.

[0043] like Figure 3 and Figure 4 As shown, the first guide roller 13 and the second guide roller 15 are arranged in pairs at the same height and are arranged corresponding to the opening of the first base frame 11. The two ends of the guide rollers are rotatably connected to the inner wall of the first base frame 11. The first driving roller 14 is arranged between the first guide roller 13 and the second guide roller 15 and is lower in height than the first guide roller 13 and the second guide roller 15, playing the role of tensioning and providing power. Figure 4 As shown, a first motor 16 is provided on the outside of the box body of the first base frame 11. The output end of the first motor 16 extends into the interior of the first base frame 11 and is connected to the first driving roller 14, driving the first driving roller 14 to rotate, so that the metal foil reaches the outlet through the inlet of the first base frame 11 and is sent to the coating mechanism 2.

[0044] like Figure 5 and Figure 6 As shown, the coating mechanism 2 includes a first liquid storage box 21, a third motor 22, a first liquid storage chamber 23, a first coating roller 24, an insertion rod 25, a second motor 26, a second liquid storage box 27, a second coating roller 28, a scraper 29 and a second liquid storage chamber 210.

[0045] The first liquid storage box 21 is arranged above the second liquid storage box 27, and the metal foil passes between the two to realize the coating work. The top of the first liquid storage box 21 is open, and a first liquid storage cavity 23 is formed inside for containing the coating liquid.

[0046] A first coating roller 24 is provided inside the first liquid storage box 21. An opening is provided at the bottom of the first liquid storage box 21. The first coating roller 24 is rotatably connected to the opening. A second motor 26 is provided on the outside of the first liquid storage box for driving the first coating roller 24. The bottom end of the first coating roller 24 is lower than the bottom surface of the first liquid storage box 27, and the top end is located in the first liquid storage cavity 23. The first coating roller 24 rotates to achieve coating on the top surface of the metal foil.

[0047] The first coating roller 24 rotates at the opening. The size of the first coating roller 24 is adapted to the opening so that the coating liquid does not remain from the opening in large quantities but only adheres to the first coating roller 24 and is coated on the metal foil as the first coating roller 24 rotates.

[0048] The second liquid reservoir 27 is open at the top, forming a second liquid storage chamber 210 within it. A second coating roller 28 is rotatably mounted within the second liquid storage chamber 210, with its ends rotatably connected to the inner wall of the second liquid reservoir 27. The top of the second coating roller 28 is higher than the top surface of the second liquid reservoir 27, and its bottom is located within the second liquid storage chamber 210. As the second coating roller rotates, the coating liquid is continuously applied to the metal foil through the second coating roller 28. A third motor 22 is mounted outside the second liquid reservoir 27, with its output connected to the second coating roller 28.

[0049] like Figure 3 As shown, the first liquid storage box 21 and the second liquid storage box 27 of this embodiment are relatively arranged at the same position between the input mechanism 1 and the output mechanism 3, which can realize the coating work on the top and bottom surfaces of the metal foil at the same time, thereby improving the coating efficiency.

[0050] The input mechanism of this embodiment includes a first base frame 11, and the output mechanism 3 includes a second base frame 31. Both base frames are box-shaped structures, with positioning plates provided on the outer sides of the front and rear side walls of the two base frames, close to each other. Specifically, a first positioning plate 12 is provided on the first base frame 11, and a second positioning plate 32 is provided on the second base frame 31. Both the first positioning plate 12 and the second positioning plate 32 are plate-like structures, each having a through hole for engaging with the insertion rod. In this embodiment, four first positioning plates 12 are provided, two on each of the front and rear sides, and four second positioning plates 32 are also provided.

[0051] like Figure 5As shown, the first liquid storage box 21 and the second liquid storage box 27 are both provided with insertion rods 25 on the outer sides of the front and rear side walls. Each liquid storage box is provided with an insertion rod 25 at both ends of the outer side. The liquid storage box is inserted into the positioning plate via the insertion rods 25. The insertion rods 25 are engaged with the positioning plate to connect the coating mechanism 2 between the input mechanism 1 and the output mechanism 3.

[0052] When personnel need to replace the coating mechanism 2, they only need to pull the first liquid storage box 21 and the second liquid storage box 27 upwards, thereby driving the insertion rod 25 to move, so that the insertion rod is separated from the first positioning plate 12 and the second positioning plate 32, and the coating mechanism 2 can be removed and replaced with a coating mechanism 2 of a different type and size, reducing the difficulty of replacing the coating mechanism 2 and improving the replacement efficiency of the coating mechanism 2.

[0053] like Figure 5 As shown, the bottom end of the first coating roller 24 and the top end of the second coating roller 28 clamp the metal foil, and the second motor 26 and the third motor 22 drive the two coating rollers to rotate, thereby conveying the metal foil forward while completing the synchronous coating work on the top and bottom surfaces of the metal foil.

[0054] like Figure 5 and Figure 6 As shown, a scraper 29 is provided at the bottom of the first liquid storage box 21 and the top of the second liquid storage box 27. The length of the scraper 29 is greater than the width of the metal foil and less than the length of the liquid storage box. The scraper 29 is provided on the side of the coating roller close to the output mechanism. The bottom end of the scraper 29 on the first liquid storage box 21 is flush with the bottom end of the first coating roller 24, and the top end of the scraper 29 on the second liquid storage box 27 is flush with the top end of the second coating roller 28.

[0055] The scraper 29 is provided to smooth the coating liquid on the metal foil, allowing the coating liquid to be evenly applied to the metal foil, improving the coating effect and reducing coating liquid waste. Excess coating liquid on the bottom surface of the metal foil can be scraped back into the second liquid storage chamber 210 by the scraper 29, and excess coating liquid on the top surface of the metal foil can be scraped away from the metal foil by the scraper 29 in the direction of the metal foil, so that the coating liquid always stays above the metal foil at the coating location, achieving continuous utilization of excess coating liquid and achieving the effect of saving coating liquid. The provision of two scrapers 29 ensures that the coating liquid is evenly distributed throughout the metal foil, ensuring the coating effect.

[0056] It can be understood that a liquid level sensor is provided in the liquid storage chamber of the first liquid storage box 21 and the second liquid storage box 27 of this embodiment, the liquid storage chamber is connected to the coating liquid adding unit, and is equipped with a solenoid valve and a corresponding controller. When the coating liquid level in the liquid storage chamber is lower than the set liquid level, the liquid level sensor sends a signal to the controller, the controller controls the solenoid valve to open, and the coating liquid in the coating liquid adding unit enters the liquid storage chamber through the pipeline, thereby realizing automatic addition of the coating liquid.

[0057] like Figure 4 As shown, the conveying roller is arranged inside the first base frame 11, the first driving roller 14 is lower than the first guide roller 13 and the second guide roller 15, and the height of the first guide roller 13 and the second guide roller 15 is set corresponding to the two groups of coating rollers.

[0058] like Figure 7 As shown, the output roller is arranged inside the second base frame 31, and the output roller 31 includes a third guide roller 33, a tensioning roller, a fourth guide roller 35 and a second drive roller 36 arranged in sequence; the tensioning roller is set individually, and the guide roller and the drive roller are set in pairs.

[0059] The output mechanism 3 structure includes a second base frame 31, a second positioning plate 32, a third guide roller 33, a tensioning roller 34, a fourth guide roller 35, a second drive roller 36, a fourth motor 37, an air guide plate 38, a nozzle 39, a blower 310 and an air pipe 311.

[0060] The second base frame 31 is similar in structure to the first base frame 11, with openings on both sides for the metal foil to enter and exit. The third guide roller 33 is located near the left opening, and the fourth guide roller 35 is located near the right opening.

[0061] A single tensioning roller 34 is provided between the third guide roller 33 and the fourth guide roller 35 for tensioning the metal foil. The tensioning roller 34 is lower than the third guide roller 33 and the fourth guide roller 35. The third guide roller 33 and the fourth guide roller 35, the second drive roller 36, the first guide roller 31, and the second guide roller 15 are all provided at the same height as the coating roller and are arranged in pairs. During coating, the metal foil can be unfolded along the horizontal plane. Compared with coating in an inclined state of the metal foil, coating in a horizontal state can ensure the coating effect.

[0062] like Figure 7 As shown, a fourth motor 37 is provided on the outside of the second base frame 31, and the output end of the fourth motor 37 is connected to one of the second driving rollers 36 to output the metal foil to the outside of the output mechanism and connect it to the next process, at which time the coating of the metal foil is completed.

[0063] In order to dry the metal foil after coating, a drying mechanism is further provided inside the output mechanism 3 , and the drying mechanism is correspondingly provided between the fourth guide roller and the second driving roller.

[0064] like Figure 3 and Figure 7As shown, the drying mechanism includes a blower arranged on the outside of the second base frame, a heating wire is provided in the blower 310, and also includes a pair of air guide plates 38 arranged between the fourth guide roller 35 and the second drive roller 36. The two air guide plates 38 are provided with nozzles, and are correspondingly arranged on the upper and lower sides of the metal foil. The blower 310 is connected to the air guide plates 38 through the air supply pipe 311, and the air guide plates 38 exhaust air through the nozzle 39, and the nozzle 39 is directed towards the metal foil, thereby achieving the drying of the metal foil.

[0065] The lithium battery coating and drying integrated equipment of this embodiment can realize double-sided coating of metal foil at the same work station through the coating mechanism, thereby improving work efficiency; the drying mechanism is arranged at the output mechanism, which can realize drying of the metal foil before output.

[0066] Example 2

[0067] In a typical embodiment of the present invention, referring to Figure 1-Figure 7 As shown, a working method of a lithium battery coating and drying integrated device, using the lithium battery coating and drying integrated device described in Example 1, includes the following steps:

[0068] When the equipment is working, the coating liquid is stored in the first liquid storage chamber 23 and the second liquid storage chamber 210, and the first coating roller 24 and the second coating roller 28 are driven to rotate by the second motor 26 and the third motor 22 respectively, so that the coating liquid contacts the first coating roller 24 and the second coating roller 28, and the coating liquid is simultaneously and synchronously coated on both sides of the metal foil by the first coating roller 24 and the second coating roller 28, so that both sides of the metal foil can be coated at the same time, without the need for coating in steps, reducing the coating steps, thereby reducing the coating difficulty and improving the coating efficiency.

[0069] Guided and driven by the first guide roller 13, the second guide roller 15, and the first drive roller 14 in the input mechanism 1, the metal foil continuously enters the coating mechanism 2 for coating. Guided and driven by the third guide roller 33, the tension roller 34, the fourth guide roller 35, and the second drive roller 36 in the output mechanism 3, the coated metal foil is continuously output to the next process. After passing through the fourth guide roller 35, the metal foil is fed into a blower 310 equipped with a heating wire. An air pipe 311 is installed at the outlet end of the blower 310, and the outlet end of the air pipe 311 is connected to an air guide plate 38, blowing hot air onto the metal foil, thereby drying it.

[0070] When personnel need to replace the coating mechanism, they only need to pull up the first liquid storage box and the second liquid storage box, thereby driving the insertion rod to move, so that the insertion rod is separated from the first positioning plate and the second positioning plate, and the coating mechanism can be removed to replace it with a coating mechanism of different type and size, reducing the difficulty of replacing the coating mechanism and improving the efficiency of replacing the coating mechanism.

[0071] When using the device, before the personnel needs to coat the metal foil, the coating liquid is added to the first liquid storage chamber on the first liquid storage box and the second liquid storage chamber on the second liquid storage box. After the coating liquid is coated, the metal foil is passed through the first guide roller 13, the first drive roller 14, the second guide roller 15, between the first coating roller 24 and the second coating roller 28, the third guide roller 33, the tensioning roller 34, and between the fourth guide roller 35 and the second drive roller 36 in sequence.

[0072] The first motor 16, the third motor 22, the second motor 26 and the fourth motor 37 work, thereby driving the first drive roller 14, the first coating roller 24, the second coating roller 28 and the second drive roller 36 to rotate, thereby driving the metal foil to move. The first coating roller 24 and the second coating roller 28 rotate, and then the coating liquid stored in the first liquid storage chamber and the second liquid storage chamber is simultaneously coated on the upper and lower sides of the metal foil, so that both sides of the metal foil can be coated simultaneously. After the metal foil is coated, the scraper 39 scrapes the metal foil to remove excess coating liquid on the metal foil, thereby improving the coating effect.

[0073] The blower 310 works to guide the air flow, and the heating wire inside the blower 310 heats the air flow, so that the hot air flow flows through the air pipe 311, and the hot air flow is transported to the air guide plate 38. The hot air flow is ejected through the nozzle 39 on the air guide plate 28, thereby drying the metal aluminum foil.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A lithium battery coating and drying integrated equipment, characterized in that, include: An input mechanism with a conveying roller inside for conveying metal foil; The output mechanism includes an output roller and a drying mechanism, wherein the output roller is used to output the coated metal foil, and the drying mechanism is provided between adjacent output rollers and is used to dry the coated metal foil; The coating mechanism is detachably connected between the input mechanism and the output mechanism, and includes a first liquid storage box and a second liquid storage box relatively arranged on the upper and lower sides of the metal foil. Each liquid storage box contains coating liquid and a corresponding coating roller. The two sets of coating rollers are used to clamp the metal foil and perform coating work.

2. The lithium battery coating and drying integrated equipment according to claim 1, characterized in that: Insertion rods are provided on both sides of the first liquid storage box and the second liquid storage box. The input mechanism includes a first base frame, and the output mechanism includes a second base frame. Positioning plates are provided on opposite sides of the first base frame and the second base frame, and the liquid storage box is inserted into the positioning plate through the insertion rods.

3. The lithium battery coating and drying integrated equipment according to claim 1, characterized in that: A first coating roller is provided inside the first liquid storage box, an opening is provided at the bottom of the first liquid storage box, the first coating roller is rotatably connected to the opening, a second motor is provided outside the first liquid storage box for driving the first coating roller, and the bottom end of the first coating roller is lower than the bottom surface of the first liquid storage box.

4. The lithium battery coating and drying integrated equipment according to claim 3, characterized in that: A second coating roller is rotatably provided in the second liquid storage box, and the top end of the second coating roller is higher than the top surface of the second liquid storage box.

5. The lithium battery coating and drying integrated equipment according to claim 4, characterized in that: Scrapers are provided at the bottom of the first liquid storage box and the top of the second liquid storage box. The bottom end of the scraper on the first liquid storage box is flush with the bottom end of the first coating roller, and the top end of the scraper on the second liquid storage box is flush with the top end of the second coating roller.

6. The lithium battery coating and drying integrated equipment according to claim 2, characterized in that: The conveying roller is arranged inside the first base frame, and the conveying roller includes a first guide roller, a first drive roller and a second guide roller arranged in sequence. The first drive roller is lower than the first guide roller and the second guide roller, and the height of the second guide roller is set corresponding to the two groups of coating rollers.

7. The lithium battery coating and drying integrated equipment according to claim 6, characterized in that: The output roller is arranged inside the second base frame, and the output roller includes a third guide roller, a tensioning roller, a fourth guide roller and a second drive roller arranged in sequence; the third guide roller, the fourth guide roller and the second drive roller are at the same height, and the tensioning roller is lower than the third guide roller.

8. The lithium battery coating and drying integrated equipment according to claim 7, characterized in that: The drying mechanism is correspondingly arranged between the fourth guide roller and the second driving roller.

9. The lithium battery coating and drying integrated equipment according to claim 8, characterized in that: The drying mechanism includes a blower arranged on the outside of the second base frame, a heating wire is provided in the blower, and a pair of air guide plates arranged between the fourth guide roller and the second drive roller, each air guide plate being provided with a nozzle. The blower is connected to the air guide plates through an air pipe, and the two air guide plates are correspondingly arranged on the upper and lower sides of the metal foil.

10. A working method of a lithium battery coating and drying integrated device, characterized in that: The lithium battery coating and drying integrated equipment according to any one of claims 1 to 9 is used, comprising the following steps: The input mechanism continuously transports the metal foil to the coating mechanism through the conveying roller. The first liquid storage box and the second liquid storage box store the coating liquid. The coating rollers on the liquid storage box rotate to bring the coating liquid into contact with the coating rollers. The two sets of coating rollers clamp the metal foil and perform the coating work; the coated metal foil is output by the output roller in the output mechanism and is dried by the drying mechanism at the same time.

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