High-speed mask coating device

Abstract

The utility model discloses a high-speed mask coating device, which comprises a foil tape conveying mechanism, a first transfer roller, a second transfer roller, a first transfer roller, a second transfer roller and a third transfer roller, wherein the foil tape conveying mechanism comprises an unwinding assembly, a foil deviation rectifying actuator, a winding assembly and a plurality of first transfer rollers; the rubber template belt conveying mechanism comprises a traction roller, a tension adjusting assembly, a scraping and sucking assembly, a cleaning assembly and a plurality of second passing rollers, a rubber template material belt is wound on the second passing rollers to form a closed rubber template material belt, and the traction roller is used for pulling the rubber template material belt to circularly convey; the scraping and sucking assembly is used for scraping and sucking slurry on the surface of a rubber template material belt, and the cleaning assembly is used for cleaning residual slurry on the surface of the rubber template material belt; and the coating mechanism comprises a coating die head and a back roller, the rubber template material belt and the foil material coincide on the back roller, the coating die head is used for coating the electrode slurry on the rubber template material belt and the foil material, and after the rubber template material belt is separated from the foil material, a required coating shape is formed on the surface of the foil material. According to the foil coating device, the edge of a foil coating can be thinned, and the coating quality and stability of the foil are improved.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, specifically to a high-speed mask coating device. Background Technology

[0002] As the market increasingly pursues high capacity density, high energy density, and high safety of electrode sheets, achieving zero thinning of the coating edges during electrode sheet production will greatly increase the content of active materials, improve the alignment accuracy of positive and negative electrodes during cell manufacturing, reduce the electronic conductivity resistance at the electrode edges, and significantly improve the performance of battery electrodes.

[0003] In existing production processes, gasket chamfering is generally used to progressively thin the left and right edges of the electrode, or intermittent valves are used to thin the thickness at the front and rear ends.

[0004] However, neither of the above two methods can achieve zero thinning at the edge of the electrode coating, and they also lead to instability in the thickness of the electrode coating, while increasing the difficulty of equipment debugging. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this invention provides a high-speed mask coating device that can achieve zero thinning of foil coating edges, thereby improving the coating quality and stability of foil.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A high-speed mask coating apparatus includes: a foil conveying mechanism, comprising an unwinding assembly, a winding assembly, and a plurality of first guide rollers, wherein the unwinding assembly is used to release a roll of foil material, the winding assembly is used to wind the foil, and the plurality of first guide rollers are used to support and guide the foil.

[0008] The template conveying mechanism includes a traction roller, a template material belt, a cleaning component, and several second guide rollers. The template material belt is a closed template material belt wound around several second guide rollers. The traction roller is used to traction the template material belt to circulate. The cleaning component is used to clean the residual slurry on the surface of the template material belt.

[0009] The coating mechanism includes a coating die and a back roller. A stencil strip and a foil are overlapped on the back roller, with the foil abutting against the roller surface of the back roller. The stencil strip is stacked on the side of the foil away from the back roller. The coating die is located on the side of the stencil strip away from the back roller. The coating die is used to coat the electrode paste onto the stencil strip and the foil.

[0010] As a further improvement to the above technical solution, the adhesive template conveying mechanism further includes a scraping and suction assembly. The scraping and suction assembly is located between the coating mechanism and the cleaning assembly. The scraping and suction assembly is used to scrape up and suck away the slurry on the surface of the adhesive template material strip. The scraping and suction assembly includes a mounting plate, a first cylinder, and a scraping and suction head. The first cylinder is mounted on the mounting plate and is used to drive the scraping and suction head to move closer to or away from the adhesive template material strip. The scraping and suction head includes a housing and a scraper disposed on the housing. A negative pressure chamber is provided inside the housing. A suction port is provided on one side of the scraper and communicates with the negative pressure chamber. The telescopic end of the first cylinder is connected to the housing.

[0011] As a further improvement to the above technical solution, an inlet pipe and an outlet pipe are respectively connected to both sides of the shell. Both the inlet pipe and the outlet pipe are connected to the negative pressure chamber. The inlet pipe is used to introduce a solution for diluting the slurry, and the outlet pipe is used to discharge the diluted waste solution.

[0012] As a further improvement to the above technical solution, the cleaning assembly includes a cleaning tank and a spray head. The spray head is located directly above the cleaning tank, and the traction roller is located inside the cleaning tank. The cleaning tank is used to load a dissolving solution, and the spray head is used to spray the cleaning solution onto the stencil material strip.

[0013] As a further improvement to the above technical solution, the adhesive template conveyor mechanism also includes a hot air drying component, which is used to dry the cleaned adhesive template material strip.

[0014] As a further improvement to the above technical solution, multiple spray heads are provided, and the multiple spray heads are spaced apart along the conveying direction of the rubber template material belt;

[0015] Multiple hot air drying components are provided, and the multiple hot air drying components are spaced apart along the conveying direction of the stencil material belt.

[0016] As a further improvement to the above technical solution, a glue pressing roller is provided on one side of the back roller. The glue pressing roller and the coating die head are arranged sequentially on the outer periphery of the back roller along the foil feeding direction. The glue pressing roller presses the glue template strip and the foil onto the back roller.

[0017] As a further improvement to the above technical solution, the adhesive template conveying mechanism further includes a tension adjustment component, which includes a swing frame, a tension roller rotatably connected to the swing frame, and a second cylinder for driving the swing frame to swing, with the adhesive template material strip wound around the tension roller.

[0018] As a further improvement to the above technical solution, the foil conveying mechanism further includes a foil correction actuator, which is used to correct the positional deviation of the foil; the adhesive template conveying mechanism further includes an adhesive template correction actuator, which is used to correct the positional deviation of the adhesive template strip.

[0019] As a further improvement to the above technical solution, the foil conveying mechanism also includes a CCD vision inspection system, which is used to detect the size and appearance of the coated foil.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model provides a high-speed mask coating device. By setting up a foil conveyor mechanism, a template conveyor mechanism, and a coating die, the template material and the foil overlap on the back roller. Then, the coating die applies electrode paste to the overlapping sheet of the template material and the foil. After coating, the template material and the foil separate. The foil is covered with the coating at the position corresponding to the cutout of the template material, forming the required coating shape. Furthermore, the foil avoids thinning zones around the edges due to the coverage of the template material, thereby achieving zero thinning at the edge of the foil coating and improving the coating quality and stability of the foil.

[0022] 2. This utility model provides a high-speed mask coating device. By setting the stencil material strip as a closed stencil material strip wound on several second rollers, the traction roller drives the stencil material strip to be conveyed. The separated stencil material strip first passes through a scraping and suction component, which scrapes up and sucks away the slurry on the surface of the stencil material strip, removing most of the slurry on the stencil material strip. Then, the residual slurry on the surface of the stencil material strip is cleaned by a cleaning component. Finally, it is conveyed and guided by the traction roller and the second rollers, so that the stencil material strip can be recycled. This saves space and reduces production costs. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a structural schematic diagram provided by an example of this utility model;

[0025] Figure 2 yes Figure 1 Schematic diagram of the middle scraping and suction assembly;

[0026] Figure 3 yes Figure 2 A sectional view;

[0027] Figure 4 yes Figure 1 A schematic diagram of the tension adjustment component.

[0028] Reference numerals: 100-foil, 110-foil correction actuator, 120-first guide roller, 131-back roller, 132-adhesive roller, 140-coating die head, 150-CCD vision inspection system;

[0029] 200-Glue template material strip, 210-Traction roller, 220-Tension adjustment component, 221-Swing frame, 222-Tension roller, 223-Second cylinder, 230-Scraper suction component, 231-Mounting plate, 232-First cylinder, 233-Scraper suction head, 240-Cleaning component, 241-Cleaning tank, 242-Spray head, 250-Second roller, 260-Hot air drying component, 270-Glue template correction actuator, 2331-House, 2332-Scraper, 2333-Negative pressure chamber, 2334-Suction port, 2335-Liquid inlet pipe, 2336-Liquid outlet pipe. Detailed Implementation

[0030] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0031] Reference Figure 1 This utility model provides a high-speed mask coating device, which includes a foil conveyor mechanism, a template conveyor mechanism, and a coating mechanism.

[0032] Structurally, the foil conveying mechanism includes an unwinding assembly (not shown in the figure), a foil correction actuator 110, a winding assembly (not shown in the figure), and several first guide rollers 120. The unwinding assembly is used to release the foil roll 100, the foil correction actuator 110 is used to correct the positional deviation of the foil 100, the winding assembly is used to wind the foil 100, and the several first guide rollers 120 are used to support and guide the foil 100.

[0033] Furthermore, the template conveying mechanism includes a traction roller 210, a template correction actuator 270, a tension adjustment component 220, a scraper and suction component 230, a cleaning component 240, and several second guide rollers 250. The template material strip 200 is a closed template material strip 200 wound on several second guide rollers 250. The traction roller 210 is used to traction the template material strip 200 to circulate. The template correction actuator 270 is used to correct the positional deviation of the template material strip 200. The tension adjustment component 220 is used to adjust the tension of the template material strip 200. The scraper and suction component 230 is used to scrape up and suck away the slurry on the surface of the template material strip 200. The cleaning component 240 is used to clean the residual slurry on the surface of the template material strip 200.

[0034] Furthermore, the coating mechanism includes a coating die 140 and a back roller 131. The stencil strip 200 and the foil 100 overlap on the back roller 131. Positionally, the foil 100 abuts against the roller surface of the back roller 131. The stencil strip 200 is stacked on the side of the foil 100 away from the back roller 131. The coating die 140 is located on the side of the stencil strip 200 away from the back roller 131. The coating die 140 is used to coat the electrode paste onto the overlapping sheet of the stencil strip 200 and the foil 100.

[0035] It should be noted that the coating die 140 can be an extrusion die, a spraying die, or a transfer coating die for a printing roller, etc.

[0036] During operation, the foil 100 is aligned and conveyed by the foil alignment actuator 110. Simultaneously, the traction roller 210 drives the template material belt 200 for conveying, and through the combined action of the template alignment actuator 270 and the tension adjustment component 220, the template material belt 200 and the foil 100 are aligned and conveyed. Then, the template material belt 200 and the foil 100 overlap on the back roller 131, causing the foil 100 to contact the roller surface of the back roller 131. The template material belt 200 is stacked on top of the foil 100. On the side away from the back roller 131, the coating die head 140 applies electrode paste to the overlapping sheet of the template strip 200 and the foil 100. After coating, the template strip 200 and the foil 100 separate. The foil 100 is covered with the coating at the cutout position of the template strip 200, forming the required coating shape. The foil 100 is protected from thinning areas due to the coverage of the template strip 200, thereby achieving zero thinning at the coating edge of the foil 100 and improving the coating quality and stability of the foil 100.

[0037] After separation, the slurry strip 200 first passes through the scraper and suction component 230, which scrapes up and sucks away the slurry on the surface of the slurry strip 200, removing most of the slurry. Then, the residual slurry on the surface of the slurry strip 200 is cleaned by the cleaning component 240. Finally, it is conveyed and guided by the traction roller 210 and the second passing roller 250, so that the slurry strip 200 can be recycled, thereby saving space and reducing production costs.

[0038] It should be noted that the cutout position of the stencil strip 200 can be set in different shapes according to the process requirements of the battery cell, thereby realizing zebra coating, symmetrical L-shaped coating and strip coating, etc. The corresponding stencil strip 200 can be a single strip or multiple strips. The side of the stencil strip 200 that contacts the foil 100 can be coated with glue or not.

[0039] Reference Figure 2 and Figure 3 In some preferred embodiments, the scraping and suction assembly 230 includes a mounting plate 231, a first cylinder 232, and a scraping and suction head 233. The first cylinder 232 is mounted on the mounting plate 231 and is used to drive the scraping and suction head 233 to approach or move away from the stencil strip 200.

[0040] During operation, the first cylinder 232 drives the scraper head 233 to approach the slurry template material belt 200, so that the scraper head 233 comes into contact with the surface of the slurry template material belt 200. During the conveying process of the slurry template material belt 200, the scraper head 233 scrapes up and sucks away the slurry on the surface of the slurry template material belt 200.

[0041] When not in operation, the first cylinder 232 drives the scraper head 233 away from the adhesive template strip 200, so that the scraper head 233 does not contact the adhesive template strip 200, thus avoiding wear on the adhesive template strip 200.

[0042] Furthermore, the scraper suction head 233 includes a housing 2331 and a scraper 2332 disposed on the housing 2331. A negative pressure chamber 2333 is provided inside the housing 2331. A suction port 2334 is provided on one side of the scraper 2332. The suction port 2334 is connected to the negative pressure chamber 2333. The telescopic end of the first cylinder 232 is connected to the housing 2331.

[0043] Understandably, the first cylinder 232 extends, driving the scraper head 233 to approach the slurry template material belt 200, so that the scraper 2332 abuts against the slurry template material belt 200. During the conveying process of the slurry template material belt 200, the scraper 2332 scrapes up the slurry on the surface of the slurry template material belt 200. Then, the scraped slurry is sucked into the negative pressure chamber 2333 through the suction port 2334, thereby quickly sucking away the scraped slurry and preventing the slurry from accumulating on the scraper 2332.

[0044] Furthermore, the shell 2331 is connected to an inlet pipe 2335 and an outlet pipe 2336 on both sides. Both the inlet pipe 2335 and the outlet pipe 2336 are connected to the negative pressure chamber 2333. The inlet pipe 2335 is used to introduce a solution for diluting the slurry, and the outlet pipe 2336 is used to discharge the diluted waste solution. After the scraped slurry is sucked into the negative pressure chamber 2333, the solution enters the negative pressure chamber 2333 from the inlet pipe 2335, so that the slurry in the negative pressure chamber 2333 is diluted by the solution. The diluted waste solution is discharged through the outlet pipe 2336. Thus, it is possible to prevent the slurry in the negative pressure chamber 2333 from drying and clumping too quickly and clogging the negative pressure chamber 2333, and to ensure that the negative pressure chamber 2333 remains unobstructed.

[0045] In some preferred embodiments, the cleaning assembly 240 includes a cleaning tank 241 and a spray head 242. The spray head 242 is located directly above the cleaning tank 241. The cleaning tank 241 is filled with a dissolving solution used to dissolve the residual slurry on the surface of the stencil strip 200. The spray head 242 is used to spray the cleaning solution onto the stencil strip 200. On the one hand, it can completely clean the residual slurry coated on the surface of the stencil strip 200, allowing the stencil strip 200 to be reused and saving production costs. On the other hand, the cleaning solution and residual dissolving solution sprayed on the surface of the stencil strip 200 can drip into the cleaning tank 241, thereby ensuring the cleanliness of the equipment and preventing the equipment from being contaminated.

[0046] In some preferred embodiments, the template conveyor mechanism further includes a hot air drying component 260, which is used to dry the cleaned template material 200, thereby quickly removing moisture or solution from the surface of the template material 200, shortening the drying time, shortening the conveyor length of the template material 200 during drying, and improving production efficiency.

[0047] Specifically, the hot air drying assembly 260 can employ an air knife, which blows a high-speed hot airflow onto the PVC template strip 200, causing the moisture or solution on the PVC template strip 200 to fly out or evaporate due to heat, thereby improving the drying efficiency.

[0048] In some preferred embodiments, multiple spray heads 242 are provided, and the multiple spray heads 242 are spaced apart along the conveying direction of the stencil strip 200, thereby being able to thoroughly clean the residual slurry coated on the surface of the stencil strip 200 and improve the cleanliness of the surface of the stencil strip 200.

[0049] Furthermore, multiple hot air drying components 260 are provided, and the multiple hot air drying components 260 are spaced apart along the conveying direction of the template material belt 200, thereby further improving the drying efficiency of the template material belt 200.

[0050] In some preferred embodiments, a pressure roller 132 is provided on one side of the back roller 131. The pressure roller 132 and the coating die head 140 are arranged sequentially on the outer periphery of the back roller 131 along the conveying direction of the foil 100. The pressure roller 132 presses the stencil strip 200 and the foil 100 onto the back roller 131. On the one hand, it can provide tension isolation between the stencil strip 200 and the foil 100. On the other hand, it can also ensure that the stencil strip 200 and the foil 100 are completely adhered, preventing air bubbles from forming between the stencil strip 200 and the foil 100, and ensuring the quality of mask coating.

[0051] After the adhesive template strip 200 and foil 100 are pressed together to form a composite sheet, the back roller 131 can support the composite sheet, making it easier for the coating die head 140 to coat the composite sheet.

[0052] Reference Figure 4 In some preferred embodiments, the tension adjustment assembly 220 includes a swing frame 221, a tension roller 222 rotatably connected to the swing frame 221, and a second cylinder 223 for driving the swing frame 221 to swing, with the stencil strip 200 wound around the tension roller 222.

[0053] Understandably, when the tension of the template strip 200 changes, the second cylinder 223 drives the swing frame 221 to swing. The swing frame 221 drives the tension roller 222 to move in an arc trajectory around the rotation center of the swing frame 221. In this way, the pressure and angle of the template strip 200 in contact with the tension roller 222 can be adjusted, thereby maintaining the tension stability of the template strip 200.

[0054] Furthermore, there are two tension adjustment components 220. In terms of position, the two tension adjustment components 220 are located in front of the glue template correction actuator 270 and behind the hot air drying component 260, respectively, and the traction roller 210 is located between the two tension adjustment components 220.

[0055] Specifically, a driven roller is also provided on one side of the traction roller 210. When the template material belt 200 is running, the traction roller 210 presses the template material belt 200 onto the driven roller, thereby increasing the friction between the template material belt 200 and the traction roller 210. The traction roller 210 rotates, thereby driving the template material belt 200 to run in a cycle.

[0056] In some preferred embodiments, the foil conveyor mechanism further includes a CCD vision inspection system 150. The CCD vision inspection system 150 is used to inspect the coating size and appearance of the coated foil 100. On the one hand, the CCD vision inspection system 150 can improve measurement accuracy through high-precision image acquisition and processing technology, and can quickly identify various defects on the coated surface of the foil 100, and classify and record the defects, which facilitates the control of the coating quality of the foil 100 and the improvement of the production process. On the other hand, by conducting non-contact inspection of the foil 100, damage to the foil 100 can be avoided, and it can also adapt to different working environments.

[0057] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A high-speed mask coating apparatus, characterized in that, include: The foil conveying mechanism includes an unwinding assembly, a winding assembly, and a plurality of first guide rollers. The unwinding assembly is used to release the foil roll, the winding assembly is used to wind the foil, and the plurality of first guide rollers are used to support and guide the foil. The template conveying mechanism includes a traction roller, a template material belt, a cleaning component, and several second guide rollers. The template material belt is a closed template material belt wound around several second guide rollers. The traction roller is used to traction the template material belt to circulate. The cleaning component is used to clean the residual slurry on the surface of the template material belt. The coating mechanism includes a coating die and a back roller. A stencil strip and a foil are overlapped on the back roller, with the foil abutting against the roller surface of the back roller. The stencil strip is stacked on the side of the foil away from the back roller. The coating die is located on the side of the stencil strip away from the back roller. The coating die is used to coat the electrode paste onto the stencil strip and the foil.

2. The high-speed mask coating apparatus according to claim 1, characterized in that, The adhesive template conveying mechanism further includes a scraping and suction assembly located between the coating mechanism and the cleaning assembly. The scraping and suction assembly is used to scrape up and suck away the slurry on the surface of the adhesive template material strip. The scraping and suction assembly includes a mounting plate, a first cylinder, and a scraping and suction head. The first cylinder is mounted on the mounting plate and is used to drive the scraping and suction head to move closer to or away from the adhesive template material strip. The scraping and suction head includes a housing and a scraper disposed on the housing. A negative pressure chamber is provided inside the housing. A suction port is provided on one side of the scraper and communicates with the negative pressure chamber. The telescopic end of the first cylinder is connected to the housing.

3. The high-speed mask coating apparatus according to claim 2, characterized in that, The shell is connected to an inlet pipe and an outlet pipe on both sides, and both the inlet pipe and the outlet pipe are connected to the negative pressure chamber. The inlet pipe is used to introduce a solution for diluting the slurry, and the outlet pipe is used to discharge the diluted waste solution.

4. The high-speed mask coating apparatus according to claim 1, characterized in that, The cleaning assembly includes a cleaning tank and a spray head. The spray head is located directly above the cleaning tank. The cleaning tank is used to hold a dissolving solution, and the spray head is used to spray the cleaning solution onto the stencil material strip.

5. A high-speed mask coating apparatus according to claim 4, characterized in that, The adhesive template conveyor mechanism also includes a hot air drying component, which is used to dry the cleaned adhesive template material strip.

6. The high-speed mask coating apparatus according to claim 5, characterized in that, The spray head is provided in multiple ways, and the multiple spray heads are arranged at intervals along the conveying direction of the rubber template material belt; Multiple hot air drying components are provided, and the multiple hot air drying components are spaced apart along the conveying direction of the stencil material belt.

7. The high-speed mask coating apparatus according to claim 1, characterized in that, A glue pressing roller is provided on one side of the back roller. The glue pressing roller and the coating die head are arranged sequentially on the outer periphery of the back roller along the foil feeding direction. The glue pressing roller presses the glue template strip and the foil onto the back roller.

8. The high-speed mask coating apparatus according to claim 1, characterized in that, The adhesive template conveying mechanism also includes a tension adjustment component, which includes a swing frame, a tension roller rotatably connected to the swing frame, and a second cylinder for driving the swing frame to swing. The adhesive template material is wound around the tension roller.

9. A high-speed mask coating apparatus according to claim 1, characterized in that, The foil conveyor mechanism also includes a foil correction actuator, which is used to correct the positional deviation of the foil. The template conveyor mechanism also includes a template correction actuator, which is used to correct the positional deviation of the template material strip.

10. A high-speed mask coating apparatus according to claim 1, characterized in that, The foil conveyor mechanism also includes a CCD vision inspection system, which is used to inspect the size and appearance of the coated foil.

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