Liquid supply system for perovskite solar cell production

Abstract

The utility model discloses a kind of liquid supply systems of perovskite solar cell production, it is related to solar cell production technical field.Liquid supply systems include collection subassembly, air compressor, be used to store perovskite solution and store subassembly, be used to coat perovskite and coating subassembly, be used to flush store subassembly and coating subassembly and be used to collect cleaning liquid and recycle subassembly, air compressor outside is equipped with air pipe, store subassembly is linked with air pipe, coating subassembly is linked with store subassembly.The utility model is provided with air compressor and solvent tank, realizes by air compressor, air pipe, liquid inlet pipe, central liquid storage tank and defoaming device cooperation, so that perovskite solution is eliminated bubble in use process, avoid bubble with solution into coating link, needle hole can be formed on substrate surface after leading to coating thickness anomaly, so as to destroy the continuity and uniformity of film.

Description

Technical Field

[0001] This utility model relates to the field of solar cell production technology, specifically to a liquid supply system for perovskite solar cell production. Background Technology

[0002] Perovskites are a class of materials with unique crystal structures, named after the calcium titanate minerals that were first discovered. These materials exhibit outstanding performance in fields such as photovoltaics and optoelectronics, especially in perovskite solar cells.

[0003] In the existing perovskite solar cell production process, the transportation of perovskite solution mostly relies on a single liquid delivery pipeline, which has a low degree of automation. In addition, as the solution flows in the pipeline, tiny air bubbles are trapped inside the liquid. After these air bubbles enter the coating stage with the solution, they will form pinholes on the substrate surface, resulting in abnormal coating thickness and thus destroying the continuity and uniformity of the film. To address this, an automated liquid supply system for perovskite solar cell production is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an automated liquid supply system for the production of perovskite solar cells, which addresses the problem that microbubbles are trapped inside the liquid. These bubbles, after entering the coating process with the solution, form pinholes on the substrate surface, leading to abnormal coating thickness and thus disrupting the continuity and uniformity of the film.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: A liquid supply system for perovskite solar cell production includes a collection component, an air compressor, a storage component for storing perovskite solution, a coating component for coating the perovskite, a cleaning component for rinsing the storage component and the coating component, and a recovery component for collecting the cleaning liquid. An air pipe is provided on the outside of the air compressor. The storage component is connected to the air pipe, the coating component is connected to the storage component, the cleaning component is connected to the coating component, and the recovery component is connected to both the cleaning component and the coating component.

[0006] Furthermore, the storage assembly includes at least one solvent tank, with a central liquid storage tank and a defoamer arranged sequentially on the outside of the solvent tank, and an inlet pipe is provided between the central liquid storage tank, the defoamer and the solvent tank.

[0007] Furthermore, the coating assembly includes a buffer tank, an injection pump, a coating die, an immersion tank, and a die tray, with a connecting pipe between the buffer tank, the injection pump, and the coating die.

[0008] Furthermore, the cleaning assembly includes at least one cleaning agent tank, and the outer side of the cleaning agent tank is sequentially provided with a liquid distribution drain, a cloth carrier, an soaking tank, a coating die, a die tray, and a central storage tank. A cleaning pipe is provided between the liquid distribution drain and the cleaning agent tank, the cloth carrier, the soaking tank, the coating die, the die tray, and the central storage tank.

[0009] Furthermore, the collection assembly includes a waste liquid tank, with a collection tray and a collection drain respectively provided on the outside of the waste liquid tank, and a liquid collection pipe provided between the waste liquid tank and the collection tray, the collection drain, the central storage tank, the coating die head, the coating die head, the soaking tank and the die head tray.

[0010] Furthermore, at least one exhaust valve is provided on the outside of the air pipe. The number of exhaust valves matches the number of solvent tanks, cleaning agent tanks, and collection tanks, and is used to control the connection status between each tank and the air compressor.

[0011] Furthermore, at least one control valve is provided between the defoamer and the buffer tank. The control valve is a pneumatic valve used to control the number of coating dies used.

[0012] Furthermore, at least one on / off valve is provided on the outside of the cleaning pipe. The on / off valve is a pneumatically controlled valve used to control the connecting pipelines between the cleaning agent tank and the dispensing drain, the dispensing drain, the coating die head and the central storage tank, the dispensing drain and the fabric carrier, and the dispensing drain and the injection pump.

[0013] Furthermore, at least one drain valve is provided on the outside of the liquid collection pipe. The drain valve is a pneumatic valve used to control the connection and disconnection between the liquid collection pipe and the collection drain, the central storage tank, the coating die head, the soaking tank, and the die head tray.

[0014] The beneficial effects of this utility model are as follows: This invention, through the combination of an air compressor and a solvent tank, enables the elimination of bubbles in the perovskite solution during use. This is achieved by coordinating the air compressor, air pipe, liquid inlet pipe, central liquid storage tank, and defoamer. This prevents bubbles from entering the coating process with the solution and forming pinholes on the substrate surface, which would lead to abnormal coating thickness and thus disrupt the continuity and uniformity of the film. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pipeline of this utility model; Reference numerals: 1. Air compressor; 101. Air pipe; 2. Solvent tank; 201. Liquid inlet pipe; 202. Central storage tank; 203. Defoamer; 3. Cleaning agent tank; 301. Cleaning pipe; 302. Dispensing drain; 303. Coating table; 4. Waste liquid tank; 401. Collection pipe; 402. Collection drain; 5. Collection tray; 6. Coating assembly; 601. Buffer tank; 602. Injection pump; 603. Coating die; 604. Immersion tank; 605. Die tray. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.

[0020] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1As shown, a liquid supply system for perovskite solar cell production includes a collection component, an air compressor 1, a storage component for storing the perovskite solution, a coating component 6 for coating the perovskite, a cleaning component for rinsing the storage component and the coating component 6, and a recovery component for collecting the cleaning liquid. An air pipe 101 is provided on the outside of the air compressor 1. The storage component is connected to the air pipe 101, the coating component 6 is connected to the storage component, the cleaning component is connected to the coating component 6, and the recovery component is connected to both the cleaning component and the coating component 6. Specifically, when coating the perovskite is required, the perovskite solution is first added to the solvent tank 2. The air compressor 1 and the air pipe 101 work together to pressurize the perovskite solution in the solvent tank 2, causing the solution to flow to the coating component 6 to complete the coating. After coating, a cleaning agent solution is added to the cleaning agent tank 3. The air compressor 1 and the air pipe 101 control the cleaning agent to clean the cavity through which the perovskite flows, preventing residual solution from crystallizing. Finally, the cleaning agent is recovered by the recovery component for centralized processing. Multiple pneumatic valves on the outside of the air pipe 101 can precisely control the on / off state of the storage component, cleaning component, recovery component and air compressor 1, ensuring that different liquids flow stably in their respective pipelines and avoiding cross-flow or flow interruption that would affect production.

[0022] like Figure 1As shown, the storage assembly includes at least one solvent tank 2. A central storage tank 202 and a defoamer 203 are sequentially arranged outside the solvent tank 2. An inlet pipe 201 connects the central storage tank 202, the defoamer 203, and the solvent tank 2. Specifically, the solvent tank 2 is configured with one active and one standby tank. With the help of a selection valve, the system can quickly switch to the standby solvent tank 2 when the solution in the currently used tank is about to run out, ensuring continuous and uninterrupted perovskite solution coating. A liquid level detection device outside the solvent tank 2 monitors the liquid level in real time. When the liquid level is below or above a set threshold, a signal is promptly issued. Simultaneously, a pressure relief valve automatically opens to release pressure when the pressure inside the tank exceeds a safe range, ensuring safe and stable operation of the solvent tank 2. The central storage tank 202 temporarily stores the perovskite solution discharged from the solvent tank 2, continuously supplying liquid to subsequent stages during solvent tank 2 switching, maintaining coating continuity. The defoamer 203 eliminates air bubbles in the perovskite solution using physical methods, ensuring a uniform and pore-free perovskite layer coated onto the solar cell substrate. The central storage tank 202 and buffer tank 601 are equipped with vent valves on their exteriors. These valves, in conjunction with an empty pipe detector, allow air to be vented from the tanks before equipment startup or during maintenance. The empty pipe detector monitors the liquid level in real time to ensure the tanks are full and to prevent air bubbles from affecting the stability of solution delivery. The vent valves and empty pipe detectors work together using pneumatic control to form an automated defoaming and liquid filling monitoring system. The detailed operation process is as follows: At the initial startup of the equipment, after switching solvent tank 2, or before the cleaning process, air must be vented from the central storage tank 202 and buffer tank 601. At this time, the control system sends a pneumatic signal to drive the pneumatic actuator of the vent valve, opening the valve. The air pressure generated by the air compressor 1 pushes the perovskite solution or cleaning agent into the defoamer 203 and the storage tank, squeezing out the air originally present in the chamber through the opened vent valve channel. An empty pipe detector is installed in the outlet pipe of the vent valve. It determines the pipe's state based on pressure changes or airflow characteristics during medium flow: when air passes through the pipe, the sensing element detects gas flow, indicating that air remains in the cavity. The control system maintains the vent valve open, continuously venting. When liquid fills the cavity and flows out of the vent valve, the medium becomes a continuous liquid. The empty pipe detector's sensing element detects stable liquid characteristics and no longer detects gas flow, then sends a full-pipe signal, indicating venting is complete. Upon receiving the venting completion signal, the control system immediately sends a pneumatic control command, causing the vent valve's actuator to reverse, closing the valve and terminating the venting process. Throughout operation, the opening and closing of the vent valve and the empty pipe detector's status detection are all transmitted and fed back via pneumatic signals. This provides a fast response and adapts to the specific electrical control requirements of the perovskite production environment, ensuring that the central storage tank 202 and buffer tank 601 are completely filled with liquid, providing a stable medium foundation for subsequent solution delivery and coating processes.

[0023] like Figure 1As shown, the coating assembly 6 includes a buffer tank 601, an injection pump 602, a coating die 603, an immersion tank 604, and a die tray 605. A connecting pipe is provided between the buffer tank 601, the injection pump 602, and the coating die 603. Specifically, during perovskite coating, the buffer tank 601 temporarily stores the perovskite solution from the previous step, ensuring a continuous and rapid supply of liquid to the injection pump 602. This prevents the injection pump 602 from experiencing cavitation due to insufficient liquid supply, thus preventing air bubbles from forming inside the pump and ensuring stable operation. The injection pump 602 precisely draws the perovskite liquid from the buffer tank 601 and delivers the solution to the coating die 603 according to the set flow rate and pressure, ensuring that the solution fully fills the internal cavity of the coating die 603, providing a basis for uniform coating. When the coating process is paused, the coating die 603 can be placed in the immersion tank 604. The special liquid in the tank prevents residual perovskite liquid on the surface of the coating die 603 from crystallizing and clogging the coating die 603. The die tray 605 is positioned below the immersion tank 604 to collect any liquid that may spill during the immersion process, preventing contamination of the equipment and working environment. The number of buffer tanks 601, injection pumps 602, and coating dies 603 can be selected according to production needs, enabling simultaneous coating of multiple substrates and improving production efficiency.

[0024] like Figure 1 As shown, the cleaning assembly includes at least one cleaning agent tank 3. Sequentially arranged on the outside of the cleaning agent tank 3 are a dispensing drain 302, a cloth carrier 303, an immersion tank 604, a coating die 603, a die tray 605, and a central storage tank 202. A cleaning pipe 301 connects the dispensing drain 302 to the cleaning agent tank 3, cloth carrier 303, immersion tank 604, coating die 603, die tray 605, and central storage tank 202. Specifically, after the perovskite coating is completed, cleaning agent is added to the cleaning agent tank 3. The air pressure provided by the air compressor 1 and the air pipe 101 controls the flow of the cleaning agent through the cleaning pipe 301 to the dispensing drain 302. The cleaning agent tank 3 adopts a one-in-one-out configuration and a selection valve, which can switch tanks promptly when the cleaning agent in the current tank 3 is insufficient, ensuring a continuous supply of cleaning agent during the cleaning process. The separator 302 diverts the cleaning agent to different components. A portion flows to the central storage tank 202, defoamer 203, and inlet pipe 201 to clean any residual perovskite solution inside. Another portion enters the coating die 603 to remove any residual solution. A third portion flows to the fabric tray 303, immersion tank 604, and die tray 605 to clean these areas that may come into contact with the perovskite solution, preventing crystallization of residual solution. The on / off valve on the outside of the cleaning pipe 301 allows for individual control of each branch pipe according to cleaning needs, ensuring that the cleaning agent accurately and thoroughly cleans all residual areas.

[0025] like Figure 1As shown, the recycling assembly includes a waste liquid tank 4, with a collection tray 5 and a collection drain 402 on the outside of the waste liquid tank 4. A collection pipe 401 is provided between the waste liquid tank 4 and the collection tray 5, collection drain 402, central storage tank 202, coating die head 603, soaking tank 604, and die head tray 605. Specifically, after rinsing, the collection pipe 401 will collect the coating table. The cleaning agent collection and guidance system in the central storage tank 202, coating die 603, soaking tank 604, and die tray 605, under the control of the drain valve, allows the cleaning agent to flow steadily into the waste liquid tank 4 through the collection drain 402. A collection tray 5 is installed at the bottom of the solvent tank 2, cleaning agent tank 3, and waste liquid tank 4, forming a closed receiving area that effectively collects any leaks from each tank, preventing liquid spread and pollution. The collected leaked liquid flows into the waste liquid tank 4 through the collection pipe 401 and collection drain 402. Finally, the plant waste liquid treatment system centrally collects and treats all waste liquid in the waste liquid tank 4, avoiding environmental pollution.

[0026] like Figure 1 As shown, at least one pneumatic valve is also provided on the outside of the air pipe 101. The number of pneumatic valves matches the number of solvent tank 2, cleaning agent tank 3, and waste liquid tank 4, and is used to control the connection status between each tank and the air compressor 1. Specifically, each exhaust valve is set to correspond one-to-one with solvent tank 2, cleaning agent tank 3, and waste liquid tank 4, and each exhaust valve individually controls the opening and closing of the air pipe 101 between the corresponding tank and the air compressor 1. When pressurizing and supplying liquid to solvent tank 2, the pneumatic valve of the corresponding solvent tank 2 is opened, and the exhaust valves of other tanks are closed; during cleaning, the exhaust valve corresponding to cleaning agent tank 3 is opened, and other unrelated exhaust valves are closed. Through precise control, it is ensured that the air pressure can accurately act on the required tank, ensuring that the liquid flows along the predetermined path.

[0027] like Figure 1 As shown, at least one control valve is also provided between the defoamer 203 and the buffer tank 601. The control valve is a pneumatic valve, used for flexible control of the number of coating dies 603 used. Specifically, the number of control valves between the defoamer 203 and the buffer tank 601 is a pneumatic valve, and its quantity matches the number of selectable coating dies 603. During the production process, the corresponding coating die 603 and its associated buffer tank 601 can be selected and activated by opening or closing the corresponding control valve according to the required number of substrates to be coated. This achieves flexible control of the number of coating dies 603 used, avoids energy and material waste, and ensures a stable and efficient coating process using the activated coating dies 603.

[0028] like Figure 1As shown, at least one on / off valve is also provided on the outside of the cleaning pipe 301. This on / off valve is a pneumatically controlled valve used to control the connecting pipelines between the cleaning agent tank 3 and the distributor 302, the distributor 302 and the coating die 603, the distributor 302 and the fabric carrier 303, the distributor 302 and the soaking tank 604, and the distributor 302 and the die tray 605. Specifically, the on / off valves are pneumatically controlled valves, and their number is determined according to the branching of the cleaning pipe 301. During the cleaning process, when the central storage tank 202 needs to be cleaned, the on / off valve between the distributor 302 and the central storage tank 202 is opened; when cleaning the fabric carrier 303, the on / off valve between the distributor 302 and the fabric carrier 303 is opened; when cleaning the coating die 603, the corresponding on / off valve is opened, and the on / off valves of pipelines that do not need cleaning can be closed simultaneously. This precise control ensures that the cleaning agent flows directly to the areas that need cleaning, effectively removing residual perovskite and improving cleaning efficiency and effectiveness.

[0029] like Figure 1 As shown, at least one drain valve is also provided on the outside of the collection pipe 401. The drain valve is a pneumatic valve used to control the connection and disconnection between the collection pipe 401 and components such as the collection drain 402, the central storage tank 202, the coating die 603, the soaking tank 604, and the die tray 605. Specifically, the drain valves are pneumatic valves and are respectively installed at the connection points of the collection pipe 401 and the collection drain 402, the central storage tank 202, the coating die 603, the soaking tank 604, and the die tray 605. After cleaning, the drain valve of the corresponding component is opened, allowing the cleaning agent to flow smoothly through the collection pipe 401 into the collection drain 402 and then into the waste liquid tank 4. During the cleaning process or when drainage is not required, the drain valve is closed to prevent the cleaning agent from being discharged prematurely and affecting the cleaning effect. The vent valve, selector valve, exhaust valve, and control valve are all pneumatically controlled, forming a unified pneumatic control system with the air compressor 1. This system provides rapid response and precise control, ensuring the coordinated and stable operation of all aspects of the entire liquid supply system.

[0030] like Figure 1As shown, the working state of the liquid supply system for the production of perovskite solar cells is as follows: During perovskite coating, the perovskite solution is first added to the solvent tank 2 of the storage module. The solvent tank 2 is set up with one in use and one in standby, and can be switched using a pneumatic valve to ensure the coating process is continuous. Then, the perovskite solution inside the solvent tank 2 is pressurized by the cooperation of the air compressor 1 and the air pipe 101, so that the perovskite liquid flows into the liquid inlet pipe 201. The perovskite solution enters the central storage tank 202 for temporary storage through the liquid inlet pipe 201, and then flows into the defoamer 203. To eliminate air bubbles and ensure the coating solution is bubble-free, the vent valves and empty pipe detectors on the outside of the central storage tank 202 and buffer tank 601 detect that the perovskite liquid is full and bubble-free inside the central storage tank 202 and buffer tank 601. Then, the liquid is pumped by the injection pump 602 into the coating die 603 to coat the substrate with perovskite. The coating assembly 6 can be configured with multiple channels for the buffer tank 601, injection pump 602, and coating die 603 to allow simultaneous processing of multiple substrates. After coating, cleaning agent solution is added to the cleaning agent tank 3 of the cleaning assembly. The cleaning agent tank 3 is also configured with one in use and one in standby. A selector valve switches between them to ensure continuous cleaning. Then, the cleaning agent tank 3 is pressurized using the air compressor 1 and air pipe 101, causing the cleaning agent to enter the distributor 302 through the cleaning pipe 301. This guides the cleaning agent to the central storage tank 202, buffer tank 601, injection pump 602, coating die 603, soaking tank 604, and die tray 605, thus rinsing the cavity through which the perovskite solution flows, preventing residual solution crystallization. Simultaneously, the cleaning agent can flow into the soaking tank 604 to interrupt the cleaning process. The coating die 603 is immersed and cleaned. The waste liquid after cleaning is guided through the collection pipe 401, thereby collecting the waste liquid in the central storage tank 202, buffer tank 601, coating die 603, immersion tank 604 and die tray 605 into the collection drain 402, and finally into the waste liquid tank 4. The collection tray 5 is set at the bottom of the solvent tank 2, cleaning agent tank 3 and waste liquid tank 4, and can collect the liquid leaked from the solvent tank 2, cleaning agent tank 3 and waste liquid tank 4, and send it into the waste liquid tank 4 for centralized treatment through the collection pipe 401 and collection drain 402.

[0031] In summary, this utility model includes an air compressor 1, a storage component for storing the perovskite solution, a coating component 6 for coating the perovskite, a cleaning component for rinsing the storage component and the coating component 6, and a recovery component for collecting the cleaning liquid. An air pipe 101 is provided on the outside of the air compressor 1. The storage component is connected to the air pipe 101, the coating component 6 is connected to the storage component, the cleaning component is connected to the coating component 6, and the recovery component is connected to both the cleaning component and the coating component 6. Through the arrangement of the air compressor 1 and the solvent tank 2, this utility model achieves the elimination of air bubbles in the perovskite solution during use by cooperating with the air compressor 1, the air pipe 101, the liquid inlet pipe 201, the central liquid storage tank 202, and the defoamer 203. This prevents air bubbles from entering the coating process with the solution and forming pinholes on the substrate surface, leading to abnormal coating thickness and thus disrupting the continuity and uniformity of the film.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid supply system for the production of perovskite solar cells, characterized in that, The device includes a collection component, an air compressor, a storage component for storing a perovskite solution, a coating component for coating the perovskite, a cleaning component for rinsing the storage component and the coating component, and a recovery component for collecting the cleaning liquid. The air compressor has an air pipe on its outside. The storage component is connected to the air pipe, the coating component is connected to the storage component, the cleaning component is connected to the coating component, and the recovery component is connected to both the cleaning component and the coating component.

2. The liquid supply system for perovskite solar cell production according to claim 1, characterized in that, The storage assembly includes at least one solvent tank, with a central liquid storage tank and a defoamer arranged sequentially on the outside of the solvent tank, and an inlet pipe provided between the central liquid storage tank, the defoamer and the solvent tank.

3. The liquid supply system for perovskite solar cell production according to claim 1, characterized in that, The coating assembly includes a buffer tank, an injection pump, a coating die, an immersion tank, and a die tray, with a connecting pipe between the buffer tank, the injection pump, and the coating die.

4. The liquid supply system for perovskite solar cell production according to claim 1, characterized in that, The cleaning assembly includes at least one cleaning agent tank. The outer side of the cleaning agent tank is provided with a liquid distribution channel, a cloth carrier, an soaking tank, a coating die, a die tray, and a central storage tank in sequence. A cleaning pipe is provided between the liquid distribution channel and the cleaning agent tank, the cloth carrier, the soaking tank, the coating die, the die tray, and the central storage tank.

5. The liquid supply system for perovskite solar cell production according to claim 1, characterized in that, The collection assembly includes a waste liquid tank, with a collection tray and a collection drain on the outside of the waste liquid tank. A collection pipe is provided between the waste liquid tank and the collection tray, the collection drain, the central storage tank, the coating die head, the soaking tank, and the die head tray.

6. The liquid supply system for perovskite solar cell production according to claim 1, characterized in that, At least one exhaust valve is also provided on the outside of the air pipe. The number of exhaust valves matches the number of solvent tanks, cleaning agent tanks, and collection tanks, and is used to control the connection status between each tank and the air compressor.

7. The liquid supply system for perovskite solar cell production according to claim 2, characterized in that, At least one control valve is provided between the defoamer and the buffer tank. The control valve is a pneumatic valve used to control the number of coating dies used.

8. The liquid supply system for perovskite solar cell production according to claim 4, characterized in that, At least one on / off valve is also provided on the outside of the cleaning pipe. The on / off valve is a pneumatically controlled valve used to control the connecting pipelines between the cleaning agent tank and the distributor, the distributor, the coating die head and the central storage tank, the distributor and the fabric carrier, and the distributor and the injection pump.

9. The liquid supply system for perovskite solar cell production according to claim 5, characterized in that, At least one drain valve is also provided on the outside of the liquid collection pipe. The drain valve is a pneumatic valve used to control the connection and disconnection between the liquid collection pipe and the various components such as the collection drain, the central storage tank, the coating die head, the soaking tank, and the die head tray.

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