A lithium battery copper foil surface composite coating spraying device

Abstract

The present application relates to lithium copper foil processing technical field, specifically disclose a kind of lithium copper foil surface composite coating spraying device, comprising: base, control console, spraying mechanism, rolling mechanism, coating supply mechanism;The quantity of the base is two, two the base is along front-back direction left and right parallel arrangement;Control console is installed in the top front side of left base;Spraying mechanism is set in the top front side of left and right two base;Rolling mechanism is set in the top rear side of left and right two base;Coating supply mechanism is set in the top right side of right base.The lithium copper foil surface composite coating spraying device, it can be based on original single-layer spraying equipment to be flexibly extended, improve the utilization of original equipment, give consideration to the processing demand of single-layer and composite coating, after expansion, it can realize slurry pretreatment, spraying, leveling integrated continuous operation, improve coating quality and product qualification rate.

Description

Technical Field

[0001] This invention relates to the field of lithium battery copper foil processing technology, specifically to a composite coating spraying device for lithium battery copper foil surface. Background Technology

[0002] Lithium-ion battery copper foil is a core material for the negative electrode current collector in lithium-ion batteries. With its excellent conductivity, good electrochemical stability, excellent machinability, and mature low-cost processing technology, it has become an indispensable component of lithium-ion batteries. It undertakes the key functions of electron conduction and collection, helping lithium-ion batteries achieve maximum output current. Its quality directly affects the energy density, cycle stability, and safety performance of the battery. The lithium-ion battery copper foil coating is a functional film covering the surface of the lithium-ion battery copper foil. It is a key means to improve the overall performance of lithium-ion batteries. It is mainly made by coating the copper foil surface with specific functional materials. Its core function is to optimize the interfacial bonding performance between the copper foil and the negative electrode active material, reduce the interfacial contact resistance, and enhance the corrosion resistance of the copper foil in the electrolyte. This prevents the copper foil from corroding during battery charging and discharging, prevents the active material from falling off, and thus improves the cycle stability of the lithium-ion battery.

[0003] In the existing technology, the original lithium battery copper foil surface coating can only complete the spraying of a single coating, and cannot achieve the composite molding of multi-component and multi-functional coatings. As a result, it is difficult to achieve key indicators such as conductivity, corrosion resistance and adhesion of the copper foil surface coating, which cannot meet the usage requirements of high-end lithium battery products. At the same time, the original single-layer spraying equipment has limited functions and lacks supporting leveling and slurry pretreatment after single-layer spraying. This leads to defects such as uneven coating thickness, surface bubbles and insufficient adhesion, resulting in a low product qualification rate. Moreover, it is impossible to expand the functions of the original equipment. If composite coating processing or coating quality improvement is required, a whole set of special equipment must be purchased, which significantly increases production investment and equipment maintenance costs. In addition, the equipment replacement process is cumbersome and affects the continuity of production. Summary of the Invention

[0004] The purpose of this invention is to provide a composite coating spraying device for lithium battery copper foil surfaces to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite coating spraying device for lithium battery copper foil surface, comprising:

[0006] The base consists of two bases, which are arranged parallel to each other in the front-to-back direction.

[0007] The control panel is installed on the top front side of the base on the left.

[0008] The spraying mechanism is located on the front top of the two bases on the left and right sides;

[0009] The roller pressing mechanism is located on the rear top of the two bases on the left and right sides;

[0010] The paint supply mechanism is located at the top right of the base described on the right.

[0011] Preferably, the spraying mechanism includes: a first vertical frame, a three-way solenoid valve, a first tank housing, a guide rail, a double-ended lead screw assembly, a first motor, and a connecting seat; there are two first vertical frames, which are respectively fixedly installed on the top front side of the left and right bases in the vertical direction; the three-way solenoid valve is installed on the top of the outer wall of the right first vertical frame, and the three-way solenoid valve is electrically connected to the control console; the first tank housing is fixedly installed on the top of the left and right first vertical frames in the horizontal direction, and the bottom of the three-way solenoid valve has a groove that communicates with the interior; the guide rail is installed on the top of the interior of the first tank housing in the horizontal direction. The rear side; the lead screw of the double-ended lead screw assembly is rotatably mounted on the front side of the inner top of the first tank shell via bearings in the left-right direction; the first motor is mounted on the right side of the outer surface of the first tank shell, the rotating end of the first motor extends into the interior of the first tank shell and is connected to the lead screw shaft of the double-ended lead screw assembly, and the first motor is electrically connected to the control console; there are two connecting seats, and the two connecting seats are respectively sleeved on the left and right sides of the guide rail rod, the lead screw nuts on the left and right sides of the double-ended lead screw assembly are respectively connected to the inner sides of the left and right connecting seats, and the bottom end of the connecting seat extends out of the inner cavity of the first tank shell.

[0012] Preferably, the bottom of both the left and right connecting seats is provided with an actuating component.

[0013] Preferably, the actuating component includes: an inclined mounting base, a first limiting component, a mounting frame, and a first electric telescopic rod; the inclined mounting base is fixedly installed at the bottom of the connecting seat, and the inner side of the inclined mounting base is inclined; there are two first limiting components, which are respectively installed at the front and rear ends of the inner side of the inclined mounting base; the mounting frame is fixedly installed inside the limiting ends of the front and rear first limiting components, the mounting frame is U-shaped, and is sleeved on the outside of the outer shell of the first groove; the first electric telescopic rod is installed in the vertical direction at the rear end of the inner side of the inclined mounting base, the telescopic end of the first electric telescopic rod is connected to the rear top of the mounting frame through a connector, and the first electric telescopic rod is electrically connected to the control console.

[0014] Preferably, the actuating component further includes: a distributor and an atomizing nozzle; the distributor is installed in the middle of the inner side of the mounting frame, the liquid inlet of the distributor and the liquid outlet of the three-way solenoid valve can be connected through a pipeline, and the distributor is electrically connected to the control panel; the number of atomizing nozzles is several, and the several atomizing nozzles are installed at intervals from front to back at the bottom of the inner side of the mounting frame, the liquid inlet of the atomizing nozzle and the liquid outlet of the distributor can be connected through a pipeline, and the atomizing nozzle is electrically connected to the control panel.

[0015] Preferably, the roller pressing mechanism includes: a second vertical frame, a second tank housing, a mounting crossbeam, a second limiting assembly, a lead screw assembly, a sleeve-type connecting seat, and a second motor; the number of second vertical frames is two, and the two second vertical frames are respectively fixedly installed on the rear top of the left and right bases in the vertical direction; the second tank housing is fixedly installed on the top of the left and right second vertical frames in the horizontal direction, and the bottom of the second tank housing has a groove that communicates with the interior; the mounting crossbeam is installed in the upper interior of the second tank housing in the horizontal direction; the number of second limiting assemblies is two, and the two second limiting assemblies are respectively in the horizontal direction; The lead screw of the lead screw assembly is rotatably mounted inside the second tank housing via bearings in the left-right direction and is located below the mounting crossbeam. A sleeve-type connecting seat is disposed in the inner cavity of the second tank housing. The top inner end of the sleeve-type connecting seat is sleeved on the outside of the mounting crossbeam and connected to the front and rear limit ends of the mounting crossbeam. The bottom inner end of the sleeve-type connecting seat is connected to the lead screw nut of the second limit assembly. A second motor is mounted on the right side of the outer surface of the second tank housing. The rotating end of the second motor extends into the interior of the second tank housing and is connected to the lead screw shaft of the lead screw assembly. The second motor is electrically connected to the control console.

[0016] Preferably, the roller pressing mechanism further includes: a trough mounting base, a third limiting component, a lifting rod, and a second electric telescopic rod; the number of trough mounting bases is two, and the two trough mounting bases are respectively fixedly installed on the bottom right side of the second trough shell and the bottom end of the sleeve connecting seat; the number of third limiting components is two, and the two third limiting components are respectively fixedly installed in the vertical direction inside the left and right trough mounting bases; the number of lifting rods is two, and the two lifting rods are respectively fixedly installed in the vertical direction in front of the limiting ends of the left and right third limiting components; the number of second electric telescopic rods is two, and the two second electric telescopic rods are respectively installed in the vertical direction inside the left and right trough mounting bases, and the two second electric telescopic rods are respectively connected to the left side of the outer surface of the left and right lifting rods through connectors, and the second electric telescopic rods are electrically connected to the control console.

[0017] Preferably, the roller pressing mechanism further includes: a U-shaped frame, a sleeve frame, a folding frame, pressure rollers, and connecting rods; there are two U-shaped frames, which are respectively fixedly installed at the bottom ends of the left and right lifting rods; there are two sets of sleeve frames, with two sleeve frames in each set, and the two sets of sleeve frames are respectively sleeved on the front and rear sides of the left and right U-shaped frames; there are two folding frames, and the upper and lower ends of the left and right sides of the two folding frames are respectively rotatably connected to the front and rear ends of the inner sides of the left and right sleeve frames and the inner sides of the left and right sets of sleeve frames via rotating shafts; there are several pressure rollers, which are respectively rotatably installed on the lower inner sides of the front and rear folding frames from two intervals on the left and right via rotating shafts; there are several connecting rods, which are respectively rotatably installed on the inner side of the axis at the intersection of the front and rear folding frames via rotating shafts.

[0018] Preferably, the coating supply mechanism includes: a vertical frame, a first housing shell, a liquid supply pump, a tank, a sealing cylinder, a filter sink, and a connecting hose; the vertical frame is fixedly installed at the top center of the base on the right side in the vertical direction; the first housing shell is installed at the top right side of the vertical frame; the liquid supply pump is installed inside the first housing shell, the outlet of the liquid supply pump is connected to the inlet of a three-way solenoid valve, and the liquid supply pump is electrically connected to a control panel; the tank is located outside the lower part of the first housing shell; the sealing cylinder is embedded in the opening at the top center of the inner cavity of the tank; the filter sink is fixedly installed at the bottom of the inner cavity of the tank by a bracket; one end of the connecting hose is connected to the inlet of the liquid supply pump, and the other end of the connecting hose passes through the inner cavity of the sealing cylinder and is connected to the outlet of the filter sink.

[0019] Preferably, the paint supply mechanism further includes: a second housing shell, a drive shaft, a trough component, a rotating seat, a connecting pin, a third motor, and a gear assembly; the second housing shell is installed inside the vertical frame; the drive shaft is rotatably mounted above the inner cavity of the vertical frame via bearings in the left-right direction, the right end of the drive shaft passes through the right side opening of the vertical frame and is fixedly connected to the left side of the outer surface of the tank; the trough component is installed on the outer surface of the drive shaft; the rotating seat is rotatably mounted at the bottom end of the inner cavity of the second housing shell via bearings in the up-down direction; the connecting pin is obliquely mounted on the outer side of the top end of the rotating seat, and the top end of the connecting pin is inserted into the inner cavity of the trough component; the third motor is installed below the inner cavity of the second housing shell, and the third motor is electrically connected to the control console; one end of the gear assembly is connected to the outside of the rotating seat via a gear key, and the other end of the gear assembly is fixedly mounted on the bottom of the rotating end of the third motor.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The rotating seat is driven to rotate by the meshing transmission of the gear assembly through the third motor; the inclined connecting pin on the rotating seat rotates in a circle with it, and at the same time, the top of the connecting pin slides back and forth and swings slightly in the inner cavity of the tank, converting the circular motion into the high-frequency small-angle reciprocating angular oscillation of the tank around the drive shaft, thereby driving the tank to swing synchronously. Through the turbulence and convection of the slurry in the tank, bubble-free and uniform mixing is achieved, providing qualified slurry for subsequent spraying.

[0022] 2. The first motor drives the screw of the double-ended screw assembly to intermittently rotate forward and backward. Utilizing the forward and reverse threads on both sides of the screw, the connecting seats on both sides move synchronously inward or outward along the guide rail, realizing the left and right position adjustment of the atomizing nozzle to adapt to workpieces of different widths. At the same time, the first electric telescopic rods on both sides extend synchronously, driving the mounting bracket to move downward under the constraint of the first limit component, adjusting the atomizing nozzle to the specified height above the workpiece. After the three-way solenoid valve is opened, the liquid supply pump, in cooperation with the filter sink and connecting hose, extracts the well-mixed slurry from the tank and pumps it into the distributor through the three-way solenoid valve. The distributor evenly distributes the slurry to each atomizing nozzle, and the nozzle atomizes the slurry and sprays it evenly onto the moving workpiece surface, completing the coating spraying.

[0023] 3. The second electric telescopic rods on both sides extend synchronously, driving the lifting rod to move downward along the groove mounting seat under the constraint of the third limiting component. This causes the U-shaped frame to descend synchronously. The folding frames on the front and rear sides allow the pressure rollers to gently contact the wet coating on the workpiece surface. The second motor drives the screw screw assembly to intermittently rotate forward and backward, causing the screw nut and sleeve connecting seat to move back and forth along the mounting crossbeam. The sleeve connecting seat drives the bottom groove mounting seat to move, thereby driving the left U-shaped frame to move back and forth. The left U-shaped frame pulls or retracts one end of the folding frame, causing each rod of the folding frame to swing around the hinge point and expand or retract synchronously. The pressure rollers disperse or move closer with the folding frame to adapt to workpieces of different widths. At the same time, they rotate synchronously with the workpiece to perform comprehensive and uniform roller pressing on the wet coating, improving the coating density and adhesion.

[0024] In summary, this invention can be flexibly expanded based on existing single-layer spraying equipment without requiring a complete equipment replacement, significantly reducing production upgrade costs while ensuring production continuity, improving the utilization rate of existing equipment, achieving multi-purpose functionality, and accommodating both single-layer and composite coating processing needs. It breaks through the limitations of the original single-layer spraying, enabling precise processing of composite coatings, taking into account the coating's conductivity, corrosion resistance, and adhesion, meeting the stringent requirements of high-end lithium battery copper foil. After expansion, it can realize integrated continuous operation of slurry pretreatment, spraying, and leveling, effectively solving the problems of insufficient coating uniformity, poor adhesion, and numerous surface defects in the original single-layer spraying, thereby improving coating quality and product qualification rate. Attached Figure Description

[0025] Figure 1This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 for Figure 1 Exploded view of the jet mechanism;

[0027] Figure 3 for Figure 2 Enlarged view of point A;

[0028] Figure 4 for Figure 1 Exploded view of the roller pressing mechanism;

[0029] Figure 5 for Figure 4 Enlarged view of point B;

[0030] Figure 6 for Figure 4 Enlarged view of point C;

[0031] Figure 7 for Figure 1 Explosion diagram of a paint supply organization;

[0032] Figure 8 for Figure 7 Enlarged view of point D.

[0033] In the diagram: 1. Base; 2. Control panel; 3. Spraying mechanism; 31. First vertical frame; 32. Three-way solenoid valve; 33. First tank housing; 34. Guide rail; 35. Double-ended lead screw assembly; 36. First motor; 37. Connecting seat; 38. Inclined mounting seat; 39. First limit assembly; 310. Mounting frame; 311. First electric telescopic rod; 312. Diverter; 313. Atomizing nozzle; 4. Roller pressing mechanism; 41. Second vertical frame; 42. Second tank housing; 43. Mounting crossbar; 44. Second limit assembly; 45. Lead screw assembly; 46. Sleeve connecting seat; 47. 48. Second motor; 49. Tank mounting base; 40. Third limiting assembly; 410. Lifting rod; 411. Second electric telescopic rod; 412. U-shaped frame; 413. Sleeve frame; 414. Folding frame; 415. Pressure roller; 416. Connecting rod; 5. Paint supply mechanism; 51. Vertical frame; 52. First housing shell; 53. Liquid supply pump; 54. Tank; 55. Sealing cylinder; 56. Filter settling cylinder; 57. Connecting hose; 58. Second housing shell; 59. Drive shaft; 510. Tank component; 511. Rotating seat; 512. Connecting pin; 513. Third motor; 514. Gear assembly. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-8 This invention provides a technical solution: a composite coating spraying device for lithium battery copper foil surface, comprising: a base 1, a control console 2, a spraying mechanism 3, a rolling mechanism 4, and a paint supply mechanism 5; there are two bases 1, which are arranged parallel to each other in the front-back direction; the control console 2 is installed on the top front side of the left base 1, and the control console 2 is a PLC integrated control console, which can preset the relevant program parameters for spraying, rolling, and slurry mixing. The operator can manually start and stop the device and adjust the operating parameters through the touch screen to ensure continuous and stable operation of the device and realize automated integrated operation; the spraying mechanism 3 is located on the top front side of the left and right bases 1; the rolling mechanism 4 is located on the top rear side of the left and right bases 1; the paint supply mechanism 5 is located on the top right side of the right base 1.

[0036] As a preferred option, further, such as Figure 2 and Figure 3As shown, the spraying mechanism 3 includes: a first vertical frame 31, a three-way solenoid valve 32, a first tank housing 33, a guide rail 34, a double-ended lead screw assembly 35, a first motor 36, and a connecting seat 37; there are two first vertical frames 31, which are fixedly installed on the top front side of the left and right bases 1 respectively in the vertical direction; the three-way solenoid valve 32 is installed on the top of the outer wall of the right first vertical frame 31, and is electrically connected to the control panel 2. Under the command of the control panel 2, the three-way solenoid valve 32 can realize the connection or disconnection between the liquid supply pump 53 and the two side distributors 312, ensuring that the slurry is delivered to the atomizing nozzle 313 as needed, while preventing slurry backflow and avoiding damage. To prevent slurry waste and pipeline blockage, and to adapt to the intermittent operation requirements of spraying work; the first tank shell 33 is fixedly installed on the top of the two first vertical frames 31 in the left and right directions, and the bottom of the three-way solenoid valve 32 has a groove that communicates with the interior; the guide rod 34 is installed on the rear side of the top of the first tank shell 33 in the left and right directions, and the guide rod 34 can provide guidance and limit for the connecting seat 37, ensuring that the connecting seat 37 always remains horizontal when it moves left and right, thereby ensuring the moving accuracy of the atomizing nozzle 313, ensuring the uniformity of coating spraying, and avoiding uneven coating thickness due to nozzle offset; the screw of the double-ended screw assembly 35 is rotatably installed in the first tank in the left and right directions through bearings. Inside the outer casing 33, at the top front, the screw of the double-ended screw assembly 35 is rotatably mounted on the top front of the first tank housing 33 via a deep groove ball bearing. The screw has positive and negative threads on both sides, converting the rotational motion of the first motor 36 into the linear reciprocating motion of the connecting seat 37. The forward and reverse rotation of the screw drives the screw nuts on both sides to move synchronously inward or outward, thereby driving the connecting seat 37 to move left and right, achieving position adjustment of the atomizing nozzle 313 to accommodate lithium-ion battery copper foil workpieces of different widths. The first motor 36 is mounted on the right side of the outer surface of the first tank housing 33, with its rotating end extending into the interior of the first tank housing 33 and connecting with the double-ended screw assembly 35. The lead screw assembly 35 is connected to the lead screw shaft. The first motor 36 is electrically connected to the control panel 2. The first motor 36 is a stepper motor. Under the command of the control panel 2, the first motor 36 rotates intermittently clockwise or counterclockwise. By controlling the rotation speed and rotation angle, the moving speed and moving distance of the connecting seat 37 are precisely controlled to ensure that the position adjustment of the atomizing nozzle 313 is precise and controllable. There are two connecting seats 37. The two connecting seats 37 are respectively sleeved on the left and right sides of the guide rail rod 34. The lead screw nuts on the left and right sides of the double-ended lead screw assembly 35 are respectively connected to the inner side of the left and right connecting seats 37. The bottom end of the connecting seat 37 extends out of the inner cavity of the first groove shell 33.

[0037] Furthermore, both the left and right connecting seats 37 have actuating components at their bottoms. These components include: an inclined mounting base 38, a first limiting component 39, a mounting frame 310, a first electric telescopic rod 311, a distributor 312, and an atomizing nozzle 313. The inclined mounting base 38 is fixedly installed at the bottom of the connecting seat 37, and its inner side is inclined. Two first limiting components 39 are installed, one at the front and one at the rear of the inner side of the inclined mounting base 38. The first limiting components 39 are linear guide rail slider assemblies, with the guide rails of the first limiting components 39 bolted to the front and rear of the inner side of the inclined mounting base 38. This provides guidance and limitation for the vertical movement of the mounting frame 310, preventing the mounting frame 310 from moving up and down. 10. During movement, if there is any forward or backward offset or swaying, ensure that the mounting bracket 310 drives the atomizing nozzle 313 to rise and fall smoothly, accurately adjust the distance between the nozzle and the workpiece, and ensure spraying accuracy. The mounting bracket 310 is fixedly installed inside the limiting ends of the two front and rear first limiting components 39. The mounting bracket 310 is U-shaped and fits onto the outside of the first tank shell 33. The first electric telescopic rod 311 is installed in the vertical direction on the inner rear end of the inclined mounting base 38. The telescopic end of the first electric telescopic rod 311 is connected to the rear top of the mounting bracket 310 through a connector. The first electric telescopic rod 311 is electrically connected to the control panel 2. Under the command of the control panel 2, the first electric telescopic rod 311 realizes telescopic movement, accurately controlling the mounting bracket. The lifting height of the 310 adjusts the distance between the atomizing nozzle 313 and the workpiece surface, ensuring that the atomized slurry adheres evenly to the workpiece surface. This avoids excessively thick coating due to too close a distance, or excessively thin coating or uneven spraying due to too far a distance. The distributor 312 is installed in the middle of the inner side of the mounting bracket 310. The inlet of the distributor 312 and the outlet of the three-way solenoid valve 32 can be connected through a pipeline. The distributor 312 is electrically connected to the control panel 2. The distributor 312 can evenly distribute the slurry delivered from the three-way solenoid valve 32 to each atomizing nozzle 313, ensuring a consistent slurry supply to each nozzle and avoiding insufficient or excessive slurry supply to some nozzles. This ensures the uniformity of the coating spraying and allows for control. Under the command of the control panel 2, the flow rate is adjusted to adapt to different spraying speed requirements. There are several atomizing nozzles 313, which are installed at intervals from front to back on the inner bottom of the mounting bracket 310. The liquid inlet of the atomizing nozzle 313 and the liquid outlet of the distributor 312 can be connected through pipelines. The atomizing nozzle 313 is electrically connected to the control panel 2. The atomizing nozzle 313 can atomize the water-based self-crosslinking conductive carbon-based slurry delivered by the distributor 312 into fine particles and spray them evenly on the surface of the moving lithium battery copper foil workpiece to form a dense and uniform composite coating. The atomization effect of the nozzle can be adjusted by the control panel 2 to adapt to slurries of different viscosities and avoid problems such as poor atomization and slurry dripping.

[0038] As a preferred option, further, such as Figure 4 , Figure 5 and Figure 6As shown, the roller pressing mechanism 4 includes: a second vertical frame 41, a second tank housing 42, a mounting crossbeam 43, a second limiting assembly 44, a lead screw assembly 45, a sleeve connecting seat 46, a second motor 47, a tank mounting seat 48, a third limiting assembly 49, a lifting rod 410, a second electric telescopic rod 411, a U-shaped frame 412, a sleeve frame 413, a folding frame 414, a pressure roller 415, and a connecting rod 416; there are two second vertical frames 41, which are fixedly installed on the rear top of the left and right bases 1 in the vertical direction; the second tank housing 42 is fixedly installed on the top of the left and right second vertical frames 41 in the horizontal direction, and the bottom of the second tank housing 42... The second groove is provided with a through-hole; the mounting crossbeam 43 is installed above the interior of the second groove housing 42 in the left-right direction; there are two second limiting components 44, which are respectively installed in the left-right direction. The second limiting components 44 are linear guide rail slider assemblies, which can provide guidance and limit for the left-right reciprocating motion of the sleeve connecting seat 46, prevent the sleeve connecting seat 46 from wobbling or shifting during movement, and ensure that the sleeve connecting seat 46 drives the groove mounting seat 48 to move smoothly, thereby ensuring the rolling accuracy of the pressure roller 415; the screw of the screw assembly 45 is rotatably installed inside the second groove housing 42 through bearings in the left-right direction, and is located at the mounting crossbeam 43. Below, the lead screw assembly 45 can convert the rotational motion of the second motor 47 into the linear reciprocating motion of the sleeve connecting seat 46. Through the forward and reverse rotation of the lead screw, the lead screw nut and the sleeve connecting seat 46 move left and right, thereby driving the left U-shaped frame 412 to move, realizing the unfolding and retraction of the pressure roller 415; the sleeve connecting seat 46 is set in the inner cavity of the second tank shell 42, the inner top of the sleeve connecting seat 46 is sleeved on the outside of the mounting crossbeam 43 and connected to the front and rear limit ends of the mounting crossbeam 43, and the inner bottom of the sleeve connecting seat 46 is connected to the lead screw nut of the second limit assembly 44; the second motor 47 is installed on the right side of the outer surface of the second tank shell 42, the second The rotating end of the motor 47 extends into the interior of the second tank housing 42 and is connected to the screw shaft of the lead screw assembly 45. The second motor 47 is electrically connected to the control panel 2. The second motor 47 is a stepper motor. Under the command of the control panel 2, the second motor 47 rotates intermittently clockwise or counterclockwise. By controlling the rotation speed and rotation angle, the moving speed and moving distance of the sleeve connecting seat 46 are precisely controlled, thereby adjusting the unfolding and retracting amplitude of the pressure roller 415 to adapt to lithium battery copper foil workpieces of different widths. There are two tank mounting seats 48. The two tank mounting seats 48 are respectively fixedly installed on the bottom right side of the second tank housing 42 and the bottom of the sleeve connecting seat 46.There are two third limiting components 49, which are fixedly installed inside the left and right slot mounting seats 48 in the vertical direction. The third limiting components 49 are linear guide rail slider assemblies, which can provide guidance and limit for the vertical movement of the lifting rod 410 and prevent the lifting rod 410 from deviating during movement. There are two lifting rods 410, which are fixedly installed in the front of the limiting ends of the left and right third limiting components 49 in the vertical direction. There are two second electric telescopic rods 411, which are installed in the left and right slot mounting seats 48 in the vertical direction. Internally, two second electric telescopic rods 411 are connected to the left side of the outer surface of the left and right lifting rods 410 respectively via connectors. The second electric telescopic rods 411 are electrically connected to the control panel 2. Under the command of the control panel 2, the second electric telescopic rods 411 realize telescopic movement, control the lifting height of the lifting rods 410, and thus adjust the contact pressure between the pressure roller 415 and the workpiece surface, ensuring the roller pressing and leveling effect while avoiding damage to the wet coating. There are two U-shaped frames 412, which are fixedly installed at the bottom ends of the left and right lifting rods 410 respectively. There are two sets of sleeve frames 413, with each set containing a certain number of sleeve frames 413. There are two sets of sleeve frames 413, which are respectively fitted onto the front and rear sides of the left and right U-shaped frames 412. The sleeve frames 413 can slide up and down along the outside of the U-shaped frames 412. The sleeve frames 413 serve as connecting components, connecting the U-shaped frames 412 and the folding frames 414, providing hinge points for the rotation of the folding frames 414. There are two folding frames 414. The upper and lower ends of the left and right sides of the two folding frames 414 are rotatably connected to the front and rear ends of the inner sides of the left and right sleeve frames 413 and the inner sides of the left and right sets of sleeve frames 413 via rotating shafts. The folding frames 414 drive the pressure rollers 415 to unfold and retract, adapting to workpieces of different widths. The pressure roller 415 is provided with mounting support. When the left U-shaped frame 412 moves left and right, the internal rods of the folding frame 414 swing synchronously around the hinge point, causing the front and rear folding frames 414 to expand or retract synchronously, thereby causing the pressure roller 415 to be evenly distributed or brought closer together, ensuring that the pressure roller 415 can fully cover the surface of the workpiece. There are several pressure rollers 415, which are rotatably mounted on the inner lower side of the front and rear folding frames 414 from two intervals on the left and right sides via rotating shafts. There are also several connecting rods 416, which are rotatably mounted on the inner side of the axis at the intersection of the front and rear folding frames 414 via rotating shafts.

[0039] As a preferred option, further, such as Figure 7 and Figure 8As shown, the paint supply mechanism 5 includes: a vertical frame 51, a first housing shell 52, a liquid supply pump 53, a tank 54, a sealing cylinder 55, a filter sink 56, a connecting hose 57, a second housing shell 58, a drive shaft 59, a tank component 510, a rotating seat 511, a connecting pin 512, a third motor 513, and a gear assembly 514; the vertical frame 51 is fixedly installed at the top center of the right side base 1 in the vertical direction; the first housing shell 52 is installed at the top right side of the vertical frame 51; the liquid supply pump 53 is installed inside the first housing shell 52, the outlet of the liquid supply pump 53 is connected to the inlet of the three-way solenoid valve 32, the liquid supply pump 53 is electrically connected to the control panel 2, and the liquid supply pump 53 is a miniature stainless steel gear pump. The pump is started or stopped under the command of the control panel 2, and the water-based self-crosslinking conductive carbon-based slurry, which has been shaken well in the tank 54, is delivered to the three-way solenoid valve 32, and then diverted to the atomizing nozzle 313 of the spraying mechanism 3. The pump speed can be adjusted by controlling the control panel 2 to precisely control the slurry delivery flow rate, avoiding slurry waste due to excessively fast supply and affecting the continuity of spraying due to excessively slow supply. The tank 54 is located on the outside of the outer shell 52 of the first housing. The tank 54 adopts a sealed design to prevent the slurry from evaporating, getting damp, or being mixed with impurities. A feeding port is reserved at the top of the tank 54 for easy replenishment of slurry by the operator. The sealing cylinder 55 is embedded in the middle opening at the top of the inner cavity of the tank 54. The sealing cylinder 55 seals the connection between the connecting hose 57 and the tank 54 to prevent the tank 54 from being contaminated. 4. During the shaking and mixing process, internal slurry leakage is prevented, while preventing outside air from entering the tank 54 and generating air bubbles, ensuring the purity of the slurry and the shaking effect. The filter settling cylinder 56 is fixedly installed at the bottom of the inner cavity of the tank 54 by a bracket. The filter settling cylinder 56 can filter and settle the slurry in the tank 54, intercepting unevenly dispersed graphene, CNT agglomerates and impurities mixed in from the outside, preventing impurities from clogging components such as the liquid supply pump 53, the three-way solenoid valve 32, and the atomizing nozzle 313. At the same time, it can make the fine sediment particles in the slurry settle at the bottom of the settling cylinder, preventing them from being extracted and affecting the coating spraying quality. One end of the connecting hose 57 is connected to the inlet of the liquid supply pump 53, and the other end of the connecting hose 57 passes through the inner cavity of the sealing cylinder 55 and connects to the filter settling cylinder. The outlet of the filter cartridge 56 is connected to the connecting hose 57, which is a high-pressure corrosion-resistant rubber hose, enabling the connection of slurry transportation. The qualified slurry filtered by the filter cartridge 56 is transported to the supply pump 53. The connecting hose 57 has good flexibility and corrosion resistance and can adapt to the swaying movement of the tank 54. The second housing shell 58 is installed inside the vertical frame 51. The drive shaft 59 is rotatably installed above the inner cavity of the vertical frame 51 in the left-right direction through bearings. The right end of the drive shaft 59 passes through the right side opening of the vertical frame 51 and is fixedly connected to the left side of the outer surface of the tank 54. The tank body 510 is installed on the outer surface of the drive shaft 59. The rotating seat 511 is rotatably installed at the bottom of the inner cavity of the second housing shell 58 in the up-down direction through bearings.The connecting pin 512 is obliquely installed on the outer side of the top of the rotating seat 511. The top of the connecting pin 512 is inserted into the inner cavity of the tank component 510. The connecting pin 512 is installed at an angle of 60° on the outer side of the top of the rotating seat 511. The top of the connecting pin 512 is inserted into the inner cavity of the tank component 510, allowing it to slide freely and swing slightly within the tank. The connecting pin 512 rotates continuously with the rotating seat 511. Simultaneously, through the sliding and swinging of its top in the inner cavity of the tank component 510, it pushes the tank component 510 to swing back and forth in an angular direction, realizing the conversion between circular motion and reciprocating swing, providing the power for the swaying and evennessing of the tank 54. Force support; the third motor 513 is installed below the inner cavity of the second housing shell 58. The third motor 513 is electrically connected to the control panel 2. The third motor 513 is a stepper motor, which starts or stops under the command of the control panel 2, driving the gear assembly 514 to rotate, thereby driving the rotating seat 511 and the connecting pin 512 to move. The motor speed can be adjusted by the control panel 2 to precisely control the swaying frequency of the tank 54; one end of the gear assembly 514 is connected to the outside of the rotating seat 511 by a gear key, and the other end of the gear assembly 514 is fixedly installed at the bottom of the rotating end of the third motor 513.

[0040] The working principle is as follows:

[0041] Step 1: The operator first installs this device behind the discharge port of the original single-layer spraying device, ensuring that the two bases 1 are symmetrically arranged on the left and right sides behind the original discharge port. This ensures that the lithium-ion battery copper foil workpieces discharged from the original single-layer spraying device can pass through the spraying mechanism 3 and the rolling mechanism 4 of this device in sequence, achieving process connection. After installation, the operator pours the water-based self-crosslinking conductive carbon-based slurry to be sprayed into the tank 54 of the coating supply mechanism 5 to complete the slurry storage preparation. Subsequently, the operator starts the preset program through the control panel 2 to control the third motor 513 to start working. The rotating end of the third motor 513 drives one side of the gear assembly 514 to rotate. Through the meshing transmission of the gear assembly 514, the rotating seat 5 is driven. 11 rotates around its own axis. The rotating seat 511 drives the inclined connecting pin 512 to rotate continuously in a circle. The top part of the outer surface of the connecting pin 512 slides back and forth and swings slightly in the inner cavity of the tank 510. The tank 510 converts the circular motion of the connecting pin 512 into the continuous high-frequency small-angle reciprocating angular oscillation of the tank 510 itself around the axis of the drive shaft 59. Then, with the cooperation of the drive shaft 59, the tank 54 is driven to perform angular oscillating oscillation motion synchronously. This oscillation motion can generate internal turbulence and convection in the slurry in the tank 54, thereby achieving bubble-free and uniform mixing of the slurry. This effectively solves the problem of easy layering and agglomeration of fillers such as graphene and CNT in water-based self-crosslinking conductive carbon-based slurry, and provides a uniform and stable slurry for subsequent spraying operations.

[0042] Step 2: When the pre-treated workpiece continues to move below the spraying mechanism 3, the preset program on the control panel 2 automatically starts the first motor 36, the first electric telescopic rod 311, the three-way solenoid valve 32, the liquid supply pump 53, the distributor 312, and the atomizing nozzle 313. The first motor 36 drives the screw of the double-ended screw assembly 35 to rotate intermittently clockwise or counterclockwise. Since the screw has positive and negative threads on both sides, its rotational force will drive the screw nuts on both sides to move synchronously inward or outward. The two connecting seats 37 on the left and right sides will reciprocate synchronously inward or outward along the guide rail 34, thereby driving the inclined mounting seat 38 at its bottom to move synchronously, realizing the left and right position adjustment of the atomizing nozzle 313. The first electric telescopic rods 311 on both sides extend synchronously, driving the mounting bracket 310 to move smoothly downward under the constraint of the first limiting component 39, adjusting the atomizing nozzle 313 to a specified height close to the workpiece. The three-way solenoid valve 32 opens, keeping the liquid supply pump 53 connected to the two diverters 312. After the liquid supply pump 53 starts, with the cooperation of the filter sink 56 and the connecting hose 57, the slurry that has been shaken evenly in the tank 54 is extracted and pumped into the two diverters 312 through the three-way solenoid valve 32. The diverters 312 evenly distribute the slurry to each atomizing nozzle 313 connected to it. The atomizing nozzle 313 atomizes the slurry into fine particles and sprays them evenly on the moving workpiece surface, completing the coating spraying operation.

[0043] Step 3: After the coating spraying is completed on the workpiece surface, it will continue to move along the conveying direction to below the roller pressing mechanism 4. The preset program of the control panel 2 will then start the second electric telescopic rod 411 and the second motor 47. The second electric telescopic rods 411 on the left and right sides will extend synchronously, driving the corresponding lifting rod 410 to move downward along the inner side of the groove mounting seat 48 under the limiting action of the third limiting component 49. The lifting rod 410 will drive the U-shaped frame 412 at its bottom to descend synchronously to the specified height, so that the U-shaped frame 412 passes through the folding frame 414 on the front and rear sides, driving several pressure rollers 415 below to gently contact the wet coating on the workpiece surface. The second motor 47 drives the lead screw of the lead screw assembly 45 to rotate intermittently clockwise or counterclockwise. The rotational force of the lead screw will drive the lead screw nut on its surface to move to the left or right. Constrained by the second limiting component 44, the sleeve connecting seat 46 will reciprocate left and right along the mounting crossbeam 43, thereby driving the groove mounting seat 48 at its bottom to move synchronously. The groove mounting seat 48 drives the left U-shaped frame 412 to reciprocate left and right. During the movement, the left U-shaped frame 412 will pull or retract one end of the front and rear folding frames 414, causing the rods inside the folding frame 414 to swing synchronously around the hinge point, thereby driving the front and rear folding frames 414 to open or close synchronously. Several pressure rollers 415 are evenly dispersed or brought together with the movement of the folding frame 414 to adapt to the rolling requirements of workpieces of different widths. At the same time, the pressure rollers 415 rotate synchronously with the movement of the workpiece, performing a comprehensive and uniform rolling operation on the wet coating on the surface of the workpiece, making the coating denser and smoother, and improving the adhesion between the coating and the copper foil workpiece.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite coating spraying device for lithium battery copper foil surface, characterized in that, include: The base (1) has two bases (1) arranged in parallel left and right directions along the front-back direction; The control console (2) is installed on the top front side of the base (1) on the left side; The spraying mechanism (3) is located on the front top of the two bases (1) on the left and right sides; The roller pressing mechanism (4) is located on the rear side of the top of the two bases (1) on the left and right sides; The paint supply mechanism (5) is located on the top right side of the base (1) on the right side; The roller pressing mechanism (4) includes: The second vertical frame (41) has two units, and the two second vertical frames (41) are fixedly installed on the rear top of the left and right bases (1) respectively in the vertical direction; The second tank shell (42) is fixedly installed on the top of the two second vertical frames (41) in the left and right directions. The bottom of the second tank shell (42) is provided with a groove that communicates with the interior. The mounting bracket (43) is installed above the interior of the second tank housing (42) in the left-right direction; The second limiting component (44) has two components, and the two second limiting components (44) are respectively along the left and right directions; The lead screw assembly (45) has its lead screw rotatably mounted inside the second groove housing (42) via bearings in the left-right direction and is located below the mounting crossbeam (43); A sleeve-type connecting seat (46) is provided in the inner cavity of the second groove shell (42). The top inner side of the sleeve-type connecting seat (46) is sleeved on the outside of the mounting crossbeam (43) and connected to the front and rear limit ends of the mounting crossbeam (43). The bottom inner side of the sleeve-type connecting seat (46) is connected to the screw nut of the second limit assembly (44). The second motor (47) is installed on the right side of the outer surface of the second tank housing (42). The rotating end of the second motor (47) extends into the interior of the second tank housing (42) and is connected to the screw shaft of the screw assembly (45). The second motor (47) is electrically connected to the control console (2). The number of the two tank mounting seats (48) is two, and the two tank mounting seats (48) are respectively fixedly installed on the bottom right side of the second tank shell (42) and the bottom of the sleeve connecting seat (46); The third limiting component (49) has two components, and the two third limiting components (49) are fixedly installed on the inner side of the left and right slot mounting bases (48) in the up and down direction respectively; The lifting rod (410) has two parts, and the two lifting rods (410) are respectively fixedly installed in the upper and lower directions on the front side of the limiting end of the left and right third limiting components (49); The second electric telescopic rod (411) has two components. The two second electric telescopic rods (411) are installed in the left and right slot mounting seats (48) in the up and down direction respectively. The two second electric telescopic rods (411) are connected to the left side of the outer surface of the left and right lifting rods (410) respectively through connectors. The second electric telescopic rods (411) are electrically connected to the control panel (2).

2. The device according to claim 1, wherein the device is a lithium battery copper foil surface composite coating spraying device. The injection mechanism (3) includes: The first vertical frame (31) has two units, and the two first vertical frames (31) are fixedly installed on the front top of the left and right bases (1) respectively in the vertical direction; A three-way solenoid valve (32) is installed on the top of the outer wall of the first vertical frame (31) on the right side. The three-way solenoid valve (32) is electrically connected to the control console (2). The outer shell (33) of the first groove is fixedly installed on the top of the two first vertical frames (31) in the left and right directions. The bottom of the three-way solenoid valve (32) is provided with a groove that communicates with the interior. The guide rod (34) is installed on the rear side of the top of the first groove shell (33) in the left-right direction; Double-ended lead screw assembly (35), wherein the lead screw of the double-ended lead screw assembly (35) is rotatably mounted on the front side of the top of the first groove housing (33) via a bearing in the left-right direction; The first motor (36) is installed on the right side of the outer surface of the first tank housing (33). The rotating end of the first motor (36) extends into the interior of the first tank housing (33) and is connected to the screw shaft of the double-ended screw assembly (35). The first motor (36) is electrically connected to the control console (2). Connecting seat (37), there are two connecting seats (37), the two connecting seats (37) are respectively sleeved on the left and right sides of the guide rail rod (34), the left and right sides of the double-ended screw assembly (35) are respectively connected to the inner side of the left and right connecting seats (37), and the bottom end of the connecting seat (37) extends out of the inner cavity of the first groove shell (33).

3. The device according to claim 2, wherein the device is a lithium battery copper foil surface composite coating spraying device. Both of the left and right connecting seats (37) have an actuating component at their bottom.

4. The device according to claim 3, wherein the device is a lithium battery copper foil surface composite coating spraying device. The execution component includes: An inclined mounting base (38) is fixedly installed at the bottom of the connecting base (37), and the inner side of the inclined mounting base (38) is an inclined surface; The first limiting component (39) has two components, and the two first limiting components (39) are respectively installed on the front and rear ends of the inner side of the inclined mounting base (38); The mounting bracket (310) is fixedly installed inside the limiting ends of the two front and rear first limiting components (39). The mounting bracket (310) is U-shaped and is sleeved on the outside of the first groove shell (33). The first electric telescopic rod (311) is installed in the vertical direction on the inner rear end of the inclined mounting base (38). The telescopic end of the first electric telescopic rod (311) is connected to the rear end of the top of the mounting bracket (310) through a connector. The first electric telescopic rod (311) is electrically connected to the control console (2).

5. The apparatus according to claim 4, wherein the copper foil is a lithium battery copper foil. The execution component further includes: The diverter (312) is installed in the middle of the inner side of the mounting bracket (310). The inlet of the diverter (312) and the outlet of the three-way solenoid valve (32) can be connected through a pipeline. The diverter (312) is electrically connected to the control panel (2). Atomizing nozzle (313), the number of atomizing nozzles (313) is several, the several atomizing nozzles (313) are installed at intervals from front to back on the inner bottom of the mounting bracket (310), the liquid inlet of the atomizing nozzle (313) and the liquid outlet of the distributor (312) can be connected through a pipeline, and the atomizing nozzle (313) and the control panel (2) are electrically connected.

6. The device according to claim 5, wherein the device is a lithium battery copper foil surface composite coating spraying device. The roller pressing mechanism (4) further includes: The number of U-shaped frames (412) is two, and the two U-shaped frames (412) are respectively fixedly installed at the bottom ends of the left and right lifting rods (410); The sleeve frame (413) is in two sets, with two sleeve frames (413) in each set. The two sets of sleeve frames (413) are respectively sleeved on the front and rear sides of the left and right U-shaped frames (412). Folding frame (414), the number of folding frames (414) is two, the upper and lower ends of the left and right sides of the two folding frames (414) are respectively connected to the front and rear ends of the inner side of the left and right sleeve frames (413) and the inner side of the left and right sleeve frames (413) through a rotating shaft; Pressure rollers (415), the number of pressure rollers (415) is several, and the several pressure rollers (415) are respectively installed on the inner side of the front and rear folding frames (414) through a rotating shaft from the left and right two intervals; Connecting rod (416), the number of connecting rods (416) is several, and the several connecting rods (416) are respectively rotatably installed on the inner side of the cross position of the front and rear folding frames (414) through a rotating shaft.

7. The apparatus according to claim 6, wherein the copper foil is a lithium battery copper foil. The paint supply mechanism (5) includes: The vertical frame (51) is fixedly installed at the top center of the base (1) on the right side in the vertical direction; The first housing shell (52) is installed on the top right side of the vertical frame (51); A liquid supply pump (53) is installed inside the first housing shell (52). The outlet of the liquid supply pump (53) is connected to the inlet of the three-way solenoid valve (32). The liquid supply pump (53) is electrically connected to the control panel (2). The tank body (54) is located on the outside of the outer shell (52) of the first box body; A sealing cylinder (55) is embedded in the opening at the top center of the inner cavity of the tank body (54); The filter cartridge (56) is fixedly installed at the bottom of the inner cavity of the tank (54) by a bracket; A connecting hose (57) is connected at one end to the inlet of the liquid supply pump (53), and the other end of the connecting hose (57) passes through the inner cavity of the sealing cylinder (55) and is connected to the outlet of the filter sink (56).

8. The device according to claim 7, wherein the device is a lithium battery copper foil surface composite coating spraying device. The paint supply mechanism (5) also includes: The second housing shell (58) is installed inside the vertical frame (51); The drive shaft (59) is rotatably mounted above the inner cavity of the vertical frame (51) via a bearing in the left-right direction. The right end of the drive shaft (59) passes through the right side opening of the vertical frame (51) and is fixedly connected to the left side of the outer surface of the tank (54). The groove component (510) is mounted on the outer surface of the drive shaft (59); The rotating seat (511) is rotatably mounted on the bottom of the inner cavity of the second housing shell (58) via a bearing in the vertical direction; A connecting pin (512) is obliquely installed on the outer side of the top of the rotating seat (511), and the top of the connecting pin (512) is inserted into the inner cavity of the groove member (510). The third motor (513) is installed below the inner cavity of the second housing shell (58), and the third motor (513) is electrically connected to the control console (2); The gear assembly (514) has a gear key connected to the outside of the rotating seat (511) at one end, and the gear at the other end of the gear assembly (514) is fixedly installed at the bottom of the rotating end of the third motor (513).

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