Perovskite solution slit type coating die head protection system

Abstract

The invention relates to a perovskite solution slit type coating die head protection system which comprises a lead screw, a lead screw sleeve, an elastic connecting plate, a front protection plate and a controller, the lead screw is fixed on a coating die head, one end of the elastic connecting plate is connected with the lead screw sleeve, the other end of the elastic connecting plate is connected with the front protection plate, a patch pressure receptor is arranged on the elastic connecting plate, and the patch pressure receptor is connected with the controller. And a curtain-shaped baroreceptor is arranged on the front protective plate. When the front protective plate touches granular sundries protruding from the surface of the coating substrate, the front protective plate generates stress change and transmits the stress change to the elastic connecting plate, the curtain-shaped pressure sensor senses the stress change generated by the front protective plate, and the patch pressure sensor senses the stress change generated by the elastic connecting plate. The controller receives stress change signals of the patch pressure sensor and the curtain-shaped pressure sensor and controls movement of the coating die head. When pressure change caused by protruding impurities during operation of the coating die head is monitored, coating is automatically stopped, and accidental damage to the coating die head is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of the preparation of perovskite thin-film solar cells, and particularly relates to a perovskite solution slot coating die head protection system. Background Art

[0002] In recent years, perovskite thin-film solar cells have received extensive attention due to their excellent photoelectric conversion efficiency and low cost. Currently, in industrial production, techniques such as spin coating, evaporation coating, printing, and slot coating are used to prepare perovskite thin films. Among them, slot coating is one of the most widely used methods due to its high production capacity, good coating window adjustment, and stable and controllable product quality.

[0003] During the slot coating process, the perovskite solution flows out of the coating die head and is evenly coated on the surface of the substrate. Since the distance between the coating die head and the substrate is small, if there are particulate impurities or protrusions on the surface of the substrate, they are likely to get stuck in the slot during the coating process, thereby affecting the perovskite film formation quality, resulting in uneven film thickness and many defects, damaging the integrity of the substrate, and seriously damaging the structure of the coating die head and reducing the service life of the equipment.

[0004] The existing substrate detection and coating die head protection strategies rely on optical systems, and detect the substrate to be coated in the form of detection light in front of the coating die head and a receiver to avoid damage caused by the collision between the coating die head and the defects of the substrate. The disadvantages of this method are as follows: 1) The error of the optical system is large when the light transmittance of the substrate defect or particle is strong; 2) The accuracy of the optical system may be affected by the substrate thickness or ambient light; 3) It is difficult to preset the particle or defect tolerance space, which improves the requirements for the substrate or is prone to false alarms. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a perovskite solution slot coating die head protection system, which adopts a pressure sensing method. During the coating process, if a pressure change caused by impurities or protrusions is detected in front of the running direction of the coating die head, the coating process is automatically stopped to avoid accidental damage to the coating die head and extend the service life of the equipment.

[0006] The present invention is implemented as follows. A perovskite solution slot die coating head protection system is provided, which includes a lead screw, a lead screw sleeve, an elastic connecting plate, a front guard plate and a controller. The lead screw is fixed on the coating die head. The lead screw sleeve is engaged with the lead screw and moves up and down along the lead screw. One end of the elastic connecting plate is connected to the lead screw sleeve, and the other end is connected to the front guard plate. The front guard plate is located at the front of the advancing direction of the coating die head. The length of the front guard plate is aligned with the length of the coating die head. The front guard plate extends downward and approaches the surface of the coating substrate. A patch pressure sensor is provided on the elastic connecting plate, and there is a signal connection between the patch pressure sensor and the controller. A curtain pressure sensor is provided on the front guard plate, and there is a signal connection between the curtain pressure sensor and the controller. Rotate the lead screw to adjust the distance between the lower end of the front guard plate and the surface of the coating substrate. When the front guard plate touches the granular debris protruding on the surface of the coating substrate, the front guard plate generates a stress change and transmits the stress change to the elastic connecting plate. The patch pressure sensor senses the stress change generated by the elastic connecting plate, and the curtain pressure sensor senses the stress change generated by the front guard plate. The controller receives the stress change signals from the patch pressure sensor and the curtain pressure sensor respectively and controls the movement of the coating die head.

[0007] The present invention is implemented as follows. A second perovskite solution slot die coating head protection system is also provided, which includes a lead screw, a lead screw sleeve, an elastic connecting plate, a front guard plate and a controller. The lead screw is fixed on the coating die head. The lead screw sleeve is engaged with the lead screw and moves up and down along the lead screw. One end of the elastic connecting plate is connected to the lead screw sleeve, and the other end is connected to the front guard plate. The front guard plate is located at the front of the advancing direction of the coating die head. The length of the front guard plate is aligned with the length of the coating die head. The front guard plate extends downward and approaches the surface of the coating substrate. A patch pressure sensor is provided on the elastic connecting plate, and there is a signal connection between the patch pressure sensor and the controller. Rotate the lead screw to adjust the distance between the lower end of the front guard plate and the surface of the coating substrate. When the front guard plate touches the granular debris protruding on the surface of the coating substrate, the front guard plate generates a stress change and transmits the stress change to the elastic connecting plate. The patch pressure sensor senses the stress change generated by the elastic connecting plate, and the controller receives the stress change signal from the patch pressure sensor and controls the movement of the coating die head.

[0008] The present invention is implemented as follows. A third perovskite solution slot coating die protection system is also provided, which includes a lead screw, a lead screw sleeve, an elastic connecting plate, a front guard plate and a controller. The lead screw is fixed on the coating die. The lead screw sleeve is matched with the lead screw and moves up and down along the lead screw. One end of the elastic connecting plate is connected to the lead screw sleeve, and the other end is connected to the front guard plate. The front guard plate is located at the front of the advancing direction of the coating die. The length of the front guard plate is aligned with the length of the coating die. The front guard plate extends downward and is close to the surface of the coating substrate. A curtain-shaped pressure sensor is arranged on the front guard plate, and a signal connection is established between the curtain-shaped pressure sensor and the controller. Rotate the lead screw to adjust the distance between the lower end of the front guard plate and the surface of the coating substrate. When the front guard plate touches the granular debris protruding on the surface of the coating substrate, the front guard plate generates a stress change. The curtain-shaped pressure sensor senses the stress change generated by the front guard plate, and the controller receives the stress change signal of the curtain-shaped pressure sensor and controls the movement of the coating die.

[0009] Further, an alarm is also arranged in the protection system.

[0010] Further, the connection between the elastic connecting plate and the lead screw sleeve is a replaceable connection.

[0011] Further, the patch pressure sensor is a piezoelectric ceramic sensor.

[0012] Compared with the prior art, the perovskite solution slot coating die protection system of the present invention includes a lead screw, a lead screw sleeve, an elastic connecting plate, a front guard plate and a controller. The lead screw is fixed on the coating die. One end of the elastic connecting plate is connected to the lead screw sleeve, and the other end is connected to the front guard plate. The front guard plate is located at the front of the advancing direction of the coating die. A patch pressure sensor is arranged on the elastic connecting plate, and a curtain-shaped pressure sensor is arranged on the front guard plate. Signal connections are respectively established between the patch pressure sensor and the curtain-shaped pressure sensor and the controller. Rotate the lead screw to adjust the distance between the lower end of the front guard plate and the surface of the coating substrate. When the front guard plate touches the granular debris protruding on the surface of the coating substrate, the front guard plate generates a stress change and transmits the stress change to the elastic connecting plate. The curtain-shaped pressure sensor senses the stress change generated by the front guard plate, the patch pressure sensor senses the stress change generated by the elastic connecting plate, and the controller respectively receives the stress change signals of the patch pressure sensor and the curtain-shaped pressure sensor and controls the movement of the coating die. The present invention adopts a pressure sensing method. During the coating process, if a pressure change caused by protruding impurities is detected on the front side of the running direction of the coating die, the coating process is automatically stopped to avoid accidental damage to the coating die and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. 1 is a three-dimensional structural schematic diagram of Embodiment 1 of the perovskite solution slot coating die protection system of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Embodiment 1

[0015] Please refer to Figure 1 As shown, the first preferred embodiment of the perovskite solution slit coating die head protection system of the present invention includes a lead screw 1, a lead screw sleeve 2, an elastic connecting plate 3, a front guard plate 4 and a controller (not shown in the figure).

[0016] The lead screw 1 is fixed on the coating die head A, and the lead screw sleeve 2 is matched with the lead screw 1 and moves up and down along the lead screw 1. One end of the elastic connecting plate 3 is connected to the lead screw sleeve 2, and the other end is connected to the front guard plate 4. The front guard plate 4 is located at the front of the advancing direction of the coating die head A. The length of the front guard plate 4 is aligned with the length of the coating die head A. The front guard plate 4 extends downward and approaches the surface of the coating substrate B.

[0017] A patch pressure sensor 5 is arranged on the elastic connecting plate 3, and a signal connection is established between the patch pressure sensor 5 and the controller. A curtain pressure sensor 6 is arranged on the front guard plate 4, and a signal connection is established between the curtain pressure sensor 6 and the controller. By rotating the lead screw 1 to adjust the distance between the lower end of the front guard plate 4 and the surface of the coating substrate B, the function of pre-checking the thickness of the coating substrate B can be achieved. Therefore, the present invention is applicable to the coating of coating substrates B with different thicknesses.

[0018] When the front guard plate 4 touches the granular debris protruding from the surface of the coating substrate B, the front guard plate 4 generates a stress change and transmits the stress change to the elastic connecting plate 3. The patch pressure sensor 5 senses the stress change generated by the elastic connecting plate 3, and the curtain pressure sensor 6 senses the stress change generated by the front guard plate 4. The controller receives the stress change signals of the patch pressure sensor 5 and the curtain pressure sensor 6 respectively and controls the movement of the coating die head A.

[0019] The protection system is also provided with an alarm (not shown in the figure). A signal connection is established between the alarm and the controller. When the pressure at the curtain pressure sensor 5 exceeds the set range, the controller will control the coating die head A to stop working and issue an alarm through the alarm. The present invention can effectively avoid accidental damage to the coating die head A due to defects of the coating substrate B, thereby prolonging the service life of the coating equipment.

[0020] The connection between the elastic connecting plate 3 and the lead screw sleeve 2 is a replaceable connection. This structure is provided to facilitate the quick replacement of the elastic connecting plate 3 and the front guard plate 4.

[0021] The patch pressure sensor 6 is a piezoelectric ceramic sensor. The setting of the piezoelectric ceramic sensor improves the detection accuracy and can emit an electrical signal under a small deformation.

[0022] The perovskite solution slot coating die head protection system of the present invention can detect defects such as granular debris protruding on the surface of the coating substrate B online, screen out unqualified coating substrates B, effectively improve the yield rate of the coating substrate B, and save the material cost of subsequent processes at the same time. Example 2

[0023] Please refer to Figure 1 As shown in the figure, the second preferred embodiment of the perovskite solution slot coating die head protection system of the present invention. The difference between this embodiment and Embodiment 1 is that only the patch pressure sensor 5 is provided on the elastic connecting plate 3, and the patch pressure sensor 5 is signal-connected to the controller. When the front guard plate 4 touches the granular debris protruding on the surface of the coating substrate B, the front guard plate 4 generates a stress change and transmits the stress change to the elastic connecting plate 3. The patch pressure sensor 5 senses the stress change of the elastic connecting plate 3, and the controller receives the stress change signal of the patch pressure sensor 5 and controls the movement of the coating die head A.

[0024] Other structures are the same as those in Embodiment 1 and will not be described in detail. Example 3

[0025] Please refer to Figure 1 As shown in the figure, the third preferred embodiment of the perovskite solution slot coating die head protection system of the present invention. The difference between this embodiment and Embodiment 1 is that only the curtain pressure sensor 6 is provided on the front guard plate 4, and the curtain pressure sensor 6 is signal-connected to the controller. When the front guard plate 4 touches the granular debris protruding on the surface of the coating substrate B, the front guard plate 4 generates a stress change, and the curtain pressure sensor 6 senses the stress change generated by the front guard plate 4. The controller receives the stress change signal of the curtain pressure sensor 6 and controls the movement of the coating die head A.

[0026] Other structures are the same as those in Embodiment 1 and will not be described in detail.

[0027] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slit coating die protection system for perovskite solution, Characterized in that, it includes a lead screw, a lead screw sleeve, an elastic connecting plate, a front guard plate and a controller. The lead screw is fixed on the coating die. The lead screw sleeve is matched with the lead screw and moves up and down along the lead screw. One end of the elastic connecting plate is connected to the lead screw sleeve, and the other end is connected to the front guard plate. The front guard plate is located at the front of the advancing direction of the coating die. The length of the front guard plate is aligned with the length of the coating die. The front guard plate extends downward and is close to the surface of the coating substrate. A patch pressure sensor is arranged on the elastic connecting plate, and there is a signal connection between the patch pressure sensor and the controller. A curtain pressure sensor is arranged on the front guard plate, and there is a signal connection between the curtain pressure sensor and the controller; Rotate the lead screw to adjust the distance between the lower end of the front guard plate and the surface of the coating substrate. When the front guard plate touches the granular debris protruding on the surface of the coating substrate, the front guard plate generates a stress change and transmits the stress change to the elastic connecting plate. The patch pressure sensor senses the stress change generated by the elastic connecting plate, and the curtain pressure sensor senses the stress change generated by the front guard plate. The controller receives the stress change signals of the patch pressure sensor and the curtain pressure sensor respectively and controls the movement of the coating die.

2. A slit coating die protection system for perovskite solution, Characterized in that, it includes a lead screw, a lead screw sleeve, an elastic connecting plate, a front guard plate and a controller. The lead screw is fixed on the coating die. The lead screw sleeve is matched with the lead screw and moves up and down along the lead screw. One end of the elastic connecting plate is connected to the lead screw sleeve, and the other end is connected to the front guard plate. The front guard plate is located at the front of the advancing direction of the coating die. The length of the front guard plate is aligned with the length of the coating die. The front guard plate extends downward and is close to the surface of the coating substrate. A patch pressure sensor is arranged on the elastic connecting plate, and there is a signal connection between the patch pressure sensor and the controller; Rotate the lead screw to adjust the distance between the lower end of the front guard plate and the surface of the coating substrate. When the front guard plate touches the granular debris protruding on the surface of the coating substrate, the front guard plate generates a stress change and transmits the stress change to the elastic connecting plate. The patch pressure sensor senses the stress change generated by the elastic connecting plate, and the controller receives the stress change signal of the patch pressure sensor and controls the movement of the coating die.

3. A slit coating die protection system for perovskite solution, Characterized in that, it includes a lead screw, a lead screw sleeve, an elastic connecting plate, a front guard plate and a controller. The lead screw is fixed on the coating die. The lead screw sleeve is matched with the lead screw and moves up and down along the lead screw. One end of the elastic connecting plate is connected to the lead screw sleeve, and the other end is connected to the front guard plate. The front guard plate is located at the front of the advancing direction of the coating die. The length of the front guard plate is aligned with the length of the coating die. The front guard plate extends downward and is close to the surface of the coating substrate. A curtain pressure sensor is arranged on the front guard plate, and there is a signal connection between the curtain pressure sensor and the controller; Rotate the lead screw to adjust the distance between the lower end of the front guard plate and the surface of the coating substrate. When the front guard plate touches the granular debris protruding on the surface of the coating substrate, the front guard plate generates a stress change. The curtain pressure sensor senses the stress change generated by the front guard plate, and the controller receives the stress change signal of the curtain pressure sensor and controls the movement of the coating die.

4. The perovskite solution slot coating die head protection system according to claim 1 or 2 or 3, characterized in that, an alarm is further provided in the protection system.

5. The perovskite solution slot coating die head protection system according to claim 1 or 2 or 3, characterized in that, the connection between the elastic connecting plate and the lead screw sleeve is a replaceable connection.

6. The perovskite solution slot coating die head protection system according to claim 1 or 2, characterized in that, the patch pressure sensor is a piezoelectric ceramic sensor.

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