A kind of solar cell film processing is scraped with coating device

Abstract

This invention provides a coating device for solar cell thin film processing, relating to the field of solar cell thin film processing. It includes a placement platform, a support base, a positioning component located at the front end of the top of the support base for positioning the substrate, a coating unit located above the support base for coating the substrate, and a storage unit located above the coating unit for storing a solution. This invention uses a filter screen to remove impurities from the solution as it enters the storage tank, and a second motor drives a transmission rod to rotate a stirring frame, thereby agitating the solution and effectively preventing sedimentation, thus ensuring the quality of the solution coated onto the substrate later. The cooperation between the positioning component and the support base ensures the stability of the substrate during subsequent coating, and the cooperation between the coating unit and the power mechanism enables uniform coating of the substrate.

Description

Technical Field

[0001] This utility model belongs to the field of solar cell thin film processing, specifically a coating device for solar cell thin film processing. Background Technology

[0002] A coating device is used in the processing of solar cell thin films. This device is specially designed to uniformly coat a thin film on a solar cell substrate, thereby increasing the performance of the solar cell.

[0003] In existing technologies, the coating apparatus for solar cell thin film processing consists of a coating head, a substrate placement platform, an injection pump, and a solution tank. During use, the substrate is placed on the placement platform, and then the injection pump transfers the active layer solution from the solution tank to the coating head. After being immersed in the solution, the coating head moves along a preset trajectory, thus uniformly coating the substrate with the solution, achieving efficient and precise thin film coating. However, in existing technologies, the solution is often directly transferred from the solution tank to the coating head. This direct transfer method does not pre-treat the solution, potentially leading to the presence of precipitates or impurities. These precipitates or impurities can easily cause thin film defects such as pinholes and cracks during the subsequent coating process. These defects not only affect the uniformity and quality of the thin film but may also reduce the performance and lifespan of the solar cell.

[0004] In summary, this utility model provides a coating device for processing thin films of solar cells to solve the above-mentioned problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A coating apparatus for processing thin films of solar cells, comprising:

[0007] The placement platform includes a support base, a positioning component disposed at the front end of the top of the support base for positioning the substrate, a coating unit disposed above the support base for coating the substrate, a power mechanism disposed at the top of the support base for moving the coating unit, and a liquid storage unit disposed above the coating unit for storing the solution.

[0008] The liquid storage unit includes a liquid storage tank, a tank cover disposed on the top of the liquid storage tank, and a processing component disposed in the inner cavity of the liquid storage tank for filtering and agitating the solution.

[0009] The processing assembly includes a second motor, a transmission rod connected to the output shaft of the second motor, an agitator fixedly connected to the lower end of the surface of the transmission rod, and a filter screen disposed on the upper end of the surface of the transmission rod.

[0010] Furthermore, in this utility model, the positioning component includes an electric push rod, a movable plate fixedly connected to the output end of the electric push rod, and a fixed plate fixedly connected to one side of the top of the support base.

[0011] Furthermore, in this utility model, the power mechanism includes a fixed frame, a first motor fixedly connected to one side of the fixed frame, a screw connected to the output shaft of the first motor, a movable frame threaded to the surface of the screw, and a cylinder fixedly connected to the front of the movable frame. The bottom of the fixed frame is fixedly connected to the support base.

[0012] Furthermore, in this utility model, the scraping unit includes a pump body, a stabilizing frame fixedly connected to the bottom of the pump body, a delivery pipe connected to the liquid outlet end of the pump body, and a scraping head connected to the other end of the delivery pipe. The top of the scraping head is connected to the output end of the cylinder, and the bottom of the stabilizing frame is fixedly connected to the support base. Support plates are fixedly connected to both sides of the back of the stabilizing frame, and a limiting rod is fixedly connected between the two support plates. The delivery pipe is wrapped around the surface of the limiting rod.

[0013] Furthermore, in this utility model, a bracket is fixedly connected to the bottom of the liquid storage tank, and the bottom of the bracket is fixedly connected to a stabilizing frame. A drain pipe is connected to the lower end of the front of the liquid storage tank.

[0014] Furthermore, in this utility model, the top of the box cover is connected to a liquid injection pipe, the bottom of the box cover is fixedly connected to a clamping plate, and the clamping plate extends into the inner cavity of the liquid storage tank and engages with the inner cavity of the liquid storage tank. A sealing strip is fixedly connected to the surface of the clamping plate and located at the bottom of the box cover, and the bottom of the sealing strip contacts the liquid storage tank.

[0015] Beneficial effects: This utility model has the following beneficial effects:

[0016] This invention uses a filter screen to remove impurities from the solution as it enters the storage tank, and a second motor drives a transmission rod to rotate a stirring frame, thereby agitating the solution and effectively preventing sedimentation. This ensures the quality of the solution when it is coated onto the substrate. The positioning component and support base work together to ensure the stability of the substrate during subsequent coating, and the coating unit and power mechanism work together to achieve uniform coating of the substrate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure of the fixed frame, movable frame, scraper head and conveying pipe of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure of the liquid storage tank, pump body and delivery pipe of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the box cover and the processing component of this utility model.

[0021] In the picture:

[0022] 100. Placement platform; 110. Support base; 120. Positioning component; 121. Electric push rod; 122. Movable plate; 123. Fixed plate; 200. Power mechanism; 210. Fixed frame; 220. First motor; 230. Screw; 240. Movable frame; 300. Scraping unit; 310. Pump body; 311. Stabilizer; 320. Delivery pipe; 321. Support plate; 322. Limiting rod; 330. Scraping head; 400. Liquid storage unit; 410. Liquid storage tank; 411. Bracket; 412. Drain pipe; 420. Tank cover; 421. Injection pipe; 422. Sealing strip; 423. Clamping plate; 430. Processing component; 431. Second motor; 432. Transmission rod; 433. Stirring frame; 434. Filter screen. Detailed Implementation

[0023] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0024] Example 1

[0025] like Figure 1-4 As shown, this is the first embodiment of the present invention, which provides a coating apparatus for processing thin films of solar cells, including...

[0026] The placement platform 100 includes a support base 110, a positioning component 120 disposed at the front end of the top of the support base 110 for positioning the substrate, a scraping unit 300 disposed above the support base 110 for scraping the substrate, a power mechanism 200 disposed at the top of the support base 110 for moving the scraping unit 300, and a liquid storage unit 400 disposed above the scraping unit 300 for storing the solution.

[0027] The liquid storage unit 400 includes a liquid storage tank 410, a tank cover 420 disposed on the top of the liquid storage tank 410, and a processing component 430 disposed in the inner cavity of the liquid storage tank 410 for filtering and agitating the solution.

[0028] The processing component 430 includes a second motor 431, a transmission rod 432 that is driven to the output shaft of the second motor 431, an agitator 433 that is fixedly connected to the lower end of the surface of the transmission rod 432, and a filter screen 434 disposed on the upper end of the surface of the transmission rod 432.

[0029] like Figure 1-4 As shown, the solution is stored in a storage tank 410, and the tank cover 420 ensures the sealing of the storage tank 410 to prevent external impurities from entering. The filter screen 434 filters out impurities in the solution when it enters the storage tank 410. The second motor 431 drives the transmission rod 432 to rotate the stirring frame 433, thereby agitating the solution and effectively preventing sedimentation. This ensures the quality of the solution when it is coated onto the substrate. The positioning component 120 and the support base 110 work together to ensure the stability of the substrate during the subsequent coating process. The coating unit 300 and the power mechanism 200 work together to achieve precise movement and coating of the coating unit 300, thereby achieving uniform coating of the substrate.

[0030] Example 2

[0031] Reference Figure 1-3 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0032] In this embodiment, the positioning component 120 includes an electric push rod 121, a movable plate 122 fixedly connected to the output end of the electric push rod 121, and a fixed plate 123 fixedly connected to one side of the top of the support base 110. The fixed plate 123 and the movable plate 122 are both fixedly connected to rubber pads on the side that are close to each other.

[0033] The power mechanism 200 includes a fixed frame 210, a first motor 220 fixedly connected to one side of the fixed frame 210, a screw 230 drivenly connected to the output shaft of the first motor 220, a movable frame 240 threadedly connected to the surface of the screw 230, and a cylinder fixedly connected to the front of the movable frame 240. The bottom of the fixed frame 210 is fixedly connected to the support base 110.

[0034] The scraping unit 300 includes a pump body 310, a stabilizer 311 fixedly connected to the bottom of the pump body 310, a delivery pipe 320 connected to the liquid outlet end of the pump body 310, and a scraping head 330 connected to the other end of the delivery pipe 320. The top of the scraping head 330 is connected to the output end of the cylinder, and the bottom of the stabilizer 311 is fixedly connected to the support base 110. Support plates 321 are fixedly connected to both sides of the back of the stabilizer 210. A limit rod 322 is fixedly connected between the two support plates 321, and the delivery pipe 320 is wrapped around the surface of the limit rod 322.

[0035] like Figure 1-3 As shown, when it is necessary to position the solar cell substrate, the electric push rod 121 pushes the movable plate 122 to move towards the fixed plate 123. The substrate is stably positioned by the clamping action of the rubber pads on both sides. The design of the rubber pads not only increases the friction but also avoids damage to the substrate. During the coating process, the first motor 220 drives the screw 230 to rotate, thereby driving the movable frame 240 and the cylinder to move along the axial direction of the screw 230. The extension and retraction of the cylinder is used to control the lifting and lowering of the coating head 330. The active layer solution is drawn from the storage tank 410 by the pump body 310 and delivered to the coating head 330 through the delivery pipe 320. The coating head 330 will coat the substrate surface according to the preset trajectory to form a uniform film. The design of the limiting rod 322 and the support plate 321 can support the delivery pipe 320, thus ensuring the stability and accuracy of the delivery pipe 320 during the coating process.

[0036] Example 3

[0037] Reference Figure 1 , 3 4 and 5 are the third embodiment of this utility model, which is based on the first two embodiments.

[0038] In this embodiment, a support 411 is fixedly connected to the bottom of the liquid storage tank 410, and the bottom of the support 411 is fixedly connected to the stabilizer 311. A drain pipe 412 is connected to the lower end of the front of the liquid storage tank 410.

[0039] The top of the cover 420 is connected to the injection pipe 421, and the bottom of the cover 420 is fixedly connected to the clamping plate 423. The clamping plate 423 extends into the inner cavity of the storage tank 410 and engages with the inner cavity of the storage tank 410. A sealing strip 422 is fixedly connected to the surface of the clamping plate 423 and located at the bottom of the cover 420. The bottom of the sealing strip 422 contacts the storage tank 410.

[0040] like Figure 1 , 3As shown in Figure 4, a bracket 411 is fixedly connected to the bottom of the liquid storage tank 410, thereby ensuring the stability of the liquid storage tank 410. A drain pipe 412 is connected to the lower end of the front of the liquid storage tank 410 for draining or replacing the solution in the liquid storage tank 410 when needed. A retaining plate 423 is fixedly connected to the bottom of the tank cover 420. The retaining plate 423 extends into the inner cavity of the liquid storage tank 410 and engages with the inner cavity of the liquid storage tank 410. This design ensures a tight connection between the tank cover 420 and the liquid storage tank 410. The bottom of the sealing strip 422 contacts the liquid storage tank 410 to ensure the sealing between the tank cover 420 and the liquid storage tank 410 and prevent external impurities from entering from the gaps.

[0041] During use, when the solution is injected into the storage tank 410 through the injection pipe 421, the solution first passes through the filter screen 434, which then filters out impurities from the solution. The clean solution falls to the lower end of the inner cavity of the storage tank 410 for storage, thus ensuring the cleanliness of the solution. During storage, the second motor 431 drives the transmission rod 432 to rotate the stirring frame 433, thereby agitating the solution and effectively preventing sedimentation. This ensures the quality of the solution when it is later coated onto the substrate. When coating the substrate, the substrate is first placed on top of the support base 110 and on one side of the fixing plate 123. The electric push rod 121 is then activated. The push rod 121 drives the movable plate 122 to move towards one side of the substrate until it contacts the substrate, thus ensuring that it is stable between the fixed plate 123 and the movable plate 122. Then, the cylinder drives the coating head 330 to adjust to a suitable height, and the first motor 220 drives the screw 230 to rotate. The screw 230 drives the movable frame 240 and the coating head 330 to move along a preset trajectory. At the same time, the pump body 310 operates, so that the pump body 310 transfers the solution inside the liquid storage tank 410 to the delivery pipe 320. The solution is then delivered to the coating head 330 through the delivery pipe 320. This allows the coating head 330 to perform coating operations on the substrate with precise movement, thus ensuring the coating quality.

[0042] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0043] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A coating apparatus for processing thin films of solar cells, characterized in that: include The placement platform (100) includes a support base (110), a positioning component (120) disposed at the front end of the top of the support base (110) for positioning the substrate, a coating unit (300) disposed above the support base (110) for coating the substrate, a power mechanism (200) disposed at the top of the support base (110) for moving the position of the coating unit (300), and a liquid storage unit (400) disposed above the coating unit (300) for storing the solution. The liquid storage unit (400) includes a liquid storage tank (410), a tank cover (420) disposed on the top of the liquid storage tank (410), and a processing assembly (430) disposed in the inner cavity of the liquid storage tank (410) for filtering and agitating the solution. The processing assembly (430) includes a second motor (431), a transmission rod (432) connected to the output shaft of the second motor (431), an agitator (433) fixedly connected to the lower end of the surface of the transmission rod (432), and a filter screen (434) disposed on the upper end of the surface of the transmission rod (432).

2. The coating apparatus for processing thin films of solar cells as described in claim 1, characterized in that: The positioning component (120) includes an electric push rod (121), a movable plate (122) fixedly connected to the output end of the electric push rod (121), and a fixed plate (123) fixedly connected to one side of the top of the support base (110).

3. The coating apparatus for processing thin films of solar cells as described in claim 1, characterized in that: The power mechanism (200) includes a fixed frame (210), a first motor (220) fixedly connected to one side of the fixed frame (210), a screw (230) drivenly connected to the output shaft of the first motor (220), a movable frame (240) threadedly connected to the surface of the screw (230), and a cylinder fixedly connected to the front of the movable frame (240). The bottom of the fixed frame (210) is fixedly connected to the support base (110).

4. The coating apparatus for processing thin films of solar cells as described in claim 3, characterized in that: The scraping unit (300) includes a pump body (310), a stabilizer (311) fixedly connected to the bottom of the pump body (310), a delivery pipe (320) connected to the liquid outlet end of the pump body (310), and a scraping head (330) connected to the other end of the delivery pipe (320). The top of the scraping head (330) is connected to the output end of the cylinder, and the bottom of the stabilizer (311) is fixedly connected to the support base (110). Support plates (321) are fixedly connected to both sides of the back of the stabilizer (210). A limit rod (322) is fixedly connected between the two support plates (321), and the delivery pipe (320) is wrapped around the surface of the limit rod (322).

5. The coating apparatus for processing thin films of solar cells as described in claim 4, characterized in that: The bottom of the liquid storage tank (410) is fixedly connected to a bracket (411), and the bottom of the bracket (411) is fixedly connected to a stabilizer (311). The lower end of the front of the liquid storage tank (410) is connected to a drain pipe (412).

6. The coating apparatus for processing thin films of solar cells as described in claim 1, characterized in that: The top of the cover (420) is connected to an injection pipe (421), and the bottom of the cover (420) is fixedly connected to a retaining plate (423). The retaining plate (423) extends into the inner cavity of the storage tank (410) and engages with the inner cavity of the storage tank (410). A sealing strip (422) is fixedly connected to the surface of the retaining plate (423) and at the bottom of the cover (420). The bottom of the sealing strip (422) contacts the storage tank (410).

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