Coating device for preventing liquid accumulation during perovskite coating

Abstract

The utility model belongs to the technical field of perovskite processing equipment, and particularly relates to a coating device for preventing liquid accumulation during perovskite coating. The utility model provides a coating device for preventing liquid accumulation in perovskite coating, which can effectively solve the problem of liquid accumulation at the tail end of a perovskite light absorption layer in the coating process, thereby remarkably improving the stability of a perovskite battery. According to the invention, the liquid pumping device and the plurality of liquid pumping needles are arranged on the coating head, so that accumulated liquid left on the glass substrate can be timely removed in the coating process, the residual of the accumulated liquid is avoided, the phenomenon of non-uniform coating caused by the residual of the accumulated liquid is avoided, and the quality of a perovskite light absorption layer is improved; and by arranging the rocker for driving the liquid extraction needle head to ascend and descend, the liquid extraction needle head is lifted in the coating process, the coating work is prevented from being affected, when accumulated liquid needs to be adsorbed, the liquid extraction needle head descends to the accumulated liquid for liquid adsorption, and the flexibility and adaptability of the device are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of perovskite processing equipment, and particularly relates to a coating device for preventing liquid accumulation during perovskite coating. Background Art

[0002] Currently, the conversion efficiency of perovskite cells in the laboratory is increasing rapidly, but most of them are still based on small-area perovskite cells. The area of ​​perovskite cells with a conversion efficiency of more than 20% is basically within 100 square centimeters. When the perovskite cell exceeds 1000 square centimeters, the conversion efficiency is difficult to reach more than 18%, which is far below the application standard for commercialization.

[0003] The stability of perovskite cells is an important factor restricting the industrialization of perovskite cells, and coating equipment, as the main equipment for making perovskite light-absorbing layers, also plays a very important role in the stability of perovskite cells. Moreover, in the coating process of the perovskite light-absorbing layer, there is often a problem of liquid accumulation at the tail end, which will seriously affect the stability of the perovskite cell. The solution of the existing technology is to use the back-absorption function of the coating head to recover the accumulated liquid. This operation also has many problems. The back-absorption of the coating head can easily cause bubbles to enter the interior of the coating head, affecting the subsequent preparation of the light-absorbing layer, and the entry of old liquid will contaminate the coating head, affecting the use of the coating head. Therefore, there is an urgent need for a coating device that can prevent liquid accumulation in perovskite coating to solve the problem of liquid accumulation at the tail end of the perovskite light-absorbing layer during the coating process.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a coating device that prevents liquid accumulation in perovskite coating.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A coating device for preventing liquid accumulation during perovskite coating comprises a coating head for coating a perovskite light-absorbing layer, and a liquid extraction device fixed to the coating head and located on a side wall in the direction of movement of the coating head. The liquid extraction device is provided with multiple liquid extraction needles for absorbing liquid remaining on a glass substrate at the end of coating the perovskite light-absorbing layer. The movement of the coating head and the absorption of the liquid extraction needles are both controlled by a control system.

[0008] Furthermore, the liquid extraction needle is fixedly provided with a rocker that drives it to rise and fall, and each of the liquid extraction needles is fixedly connected to the rocker.

[0009] Furthermore, a push rod is provided on the side wall of the liquid extraction device, and the push rod drives the liquid extraction needle to move up and down by telescopically driving the rocker, and the telescopic movement of the push rod is controlled by a control system.

[0010] Furthermore, there are two push rods, which are symmetrically arranged on both sides of the liquid extraction device. The two push rods are extended and retracted at the same time and act on the rocker to realize the lifting and lowering of the liquid extraction needle.

[0011] Furthermore, each of the liquid extraction needles is provided with a liquid extraction pump, which is fixedly arranged in the liquid extraction device and is controlled to be opened and closed by a control system.

[0012] Furthermore, the liquid pumping device is further provided with a liquid storage chamber connected to the liquid pump.

[0013] Furthermore, the liquid extraction pump is connected to the liquid extraction needle through a flexible pipeline.

[0014] Furthermore, the liquid extraction device is also provided with a liquid extraction tube for outputting the accumulated fluid sucked out by the liquid extraction needle out of the liquid extraction device.

[0015] Specifically, the rocker is hinged to one end of the shift lever, and the other end of the shift lever is hinged to the side wall of the liquid extraction device. The shift lever is manually adjusted to drive the rocker to drive the liquid extraction needle to move up and down.

[0016] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0017] The utility model provides a coating device for preventing liquid accumulation in perovskite coating. The device can effectively solve the problem of liquid accumulation at the tail end of the perovskite light-absorbing layer during the coating process, thereby significantly improving the stability of the perovskite battery. By installing a liquid extraction device and multiple liquid extraction needles on the coating head, the liquid accumulated on the glass substrate can be removed in time during the coating process, thereby avoiding the residual liquid accumulation and the uneven coating caused by the residual liquid accumulation, thereby improving the quality of the perovskite light-absorbing layer.

[0018] Furthermore, by setting a rocker to drive the liquid extraction needle to rise and fall, the liquid extraction needle is lifted during the coating process to avoid affecting the coating work. When the accumulated liquid needs to be absorbed, the liquid extraction needle is lowered to the accumulated liquid to absorb the liquid, which increases the flexibility and adaptability of the device.

[0019] Furthermore, each liquid extraction needle is equipped with an independent liquid extraction pump and a special liquid storage chamber is set to collect the accumulated liquid, which avoids the old liquid from contaminating the coating head and extends the service life of the coating head;

[0020] In summary, the coating device of the present invention not only solves the problem of liquid accumulation during the coating process of the perovskite light-absorbing layer, but also improves the coating quality and the cleanliness of the coating head, thereby improving the overall stability and production efficiency of the perovskite battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are incorporated into and constitute a part of this specification and, together with the description, are used to explain the principles of the present invention.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0024] Figure 2 This is the main view of the utility model;

[0025] Figure 3 It is a side view of the utility model;

[0026] Figure 4 It is a cross-sectional view of the present utility model.

[0027] Among them: 1 is the coating head; 2 is the liquid extraction device; 3 is the liquid extraction needle; 4 is the liquid extraction pump; 5 is the liquid storage chamber; 6 is the liquid extraction tube; 7 is the push rod; 8 is the rocker. DETAILED DESCRIPTION

[0028] Exemplary embodiments will now be described in detail, with examples shown in the accompanying drawings. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present invention. Instead, they are merely examples consistent with certain aspects of the present invention as detailed in the appended claims.

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] See also Figure 1-4 As shown, this embodiment provides a coating device for preventing liquid accumulation during perovskite coating, comprising a coating head 1 for coating a perovskite light-absorbing layer, and a liquid extraction device 2 fixed to the coating head 1 and located on a side wall in the direction of movement of the coating head 1. The liquid extraction device 2 is provided with a plurality of liquid extraction needles 3 for absorbing liquid accumulated on the glass substrate at the end of the perovskite light-absorbing layer coating. The movement of the coating head 1 and the absorption of the liquid extraction needles 3 are controlled by a control system, see Figure 1 As shown; the liquid pumping device 2 is arranged on the side wall behind the coating head 1 in the movement direction.

[0032] Furthermore, the liquid extraction needle 3 is fixedly provided with a rocker 8 that drives it to rise and fall, and each of the liquid extraction needles 3 is fixedly connected to the rocker 8.

[0033] Furthermore, a push rod 7 is provided on the side wall of the liquid extraction device 2. The control system controls the push rod 7 to drive the liquid extraction needle 3 to move up and down by telescopically driving the rocker 8. Figure 3 shown.

[0034] Furthermore, there are two push rods 7, which are symmetrically arranged on both sides of the liquid extraction device 2. The two push rods 7 are extended and retracted at the same time and act on the rocker 8 to realize the lifting and lowering of the liquid extraction needle 3. Figure 2 shown.

[0035] Furthermore, each of the liquid extraction needles 3 is provided with a liquid extraction pump 4, and the liquid extraction pump 4 is fixedly arranged in the liquid extraction device 2 and is controlled to be opened and closed by a control system.

[0036] Furthermore, the liquid pumping device 2 is further provided with a liquid storage chamber 5 connected to the liquid pump 4 .

[0037] Furthermore, the liquid extraction pump 4 is connected to the liquid extraction needle 3 through a flexible pipeline.

[0038] Furthermore, the liquid extraction device 2 is also provided with a liquid extraction tube 6 for outputting the accumulated fluid sucked out by the liquid extraction needle 3 out of the liquid extraction device 2 .

[0039] Specifically, the control system includes a PLC controller, a distance sensor for detecting the distance between the liquid extraction needle 3 and the perovskite light absorbing layer, and a memory for storing operating data and operating programs. The control system controls the movement of the coating head 1, the extension and retraction of the push rod 7, and the opening and closing of the liquid extraction pump 4 to realize the automatic operation of the coating device.

[0040] This embodiment also provides a coating method for a coating device that prevents liquid accumulation during perovskite coating. The specific method is as follows:

[0041] When the coating head 1 is applied to the end of the perovskite battery, there is a lot of accumulated liquid at the position where the coating head 1 contacts the glass substrate. At this time, the control system controls the coating head 1 to stop moving, and at the same time controls the push rod 7 to drive the rocker 8 to lower all the liquid extraction needles 3 to the liquid accumulation area. At the same time, the distance sensor is used to identify the height to which the liquid extraction needles 3 are lowered to prevent the liquid extraction needles 3 from damaging the coated perovskite light-absorbing layer. Then the control system controls the liquid extraction pump 4 to absorb the accumulated liquid. At this time, if there is too much accumulated liquid in the liquid storage chamber 5, the control system controls the external liquid extraction pump to extract the excess accumulated liquid through the liquid extraction tube 6 to prevent the liquid storage chamber 5 from storing too much liquid, which affects the absorption of the accumulated liquid by the liquid extraction pump 4.

[0042] When the accumulated fluid absorption meets the requirements, the control system controls the push rod 7 to drive the rocker 8 to lift the liquid extraction needle 3 to a position that does not affect the use of the coating head 1, and then the control system controls the coating head 1 to lift and carry out subsequent process work.

[0043] Example 2

[0044] The difference between this embodiment and embodiment 1 is that the rocker 8 is hinged to one end of the shift lever, and the other end of the shift lever is hinged to the side wall of the liquid extraction device 2. The shift lever is manually adjusted to drive the rocker 8 to drive the liquid extraction needle 3 to move up and down.

[0045] This embodiment also provides a coating method for a coating device that prevents liquid accumulation during perovskite coating. The specific method is as follows:

[0046] When the coating head 1 is applied to the end of the perovskite battery, there is a lot of accumulated liquid at the position where the coating head 1 contacts the glass substrate. At this time, the control system controls the coating head 1 to stop moving, and at the same time manually adjusts the lever to drive the rocker 8 to lower all the liquid extraction needles 3 to the liquid accumulation area. At the same time, the distance sensor identifies the height to which the liquid extraction needles 3 are lowered to prevent the liquid extraction needles 3 from falling too much and damaging the coated perovskite light-absorbing layer. Then the control system controls the liquid extraction pump 4 to absorb the accumulated liquid. At this time, if there is too much accumulated liquid in the liquid storage chamber 5, the control system controls the external liquid extraction pump to extract the excess accumulated liquid through the liquid extraction tube 6 to prevent the liquid storage chamber 5 from storing too much liquid and affecting the absorption of the accumulated liquid by the liquid extraction pump 4.

[0047] When the accumulated fluid absorption meets the requirements, the lever is manually adjusted to drive the rocker 8 to lift the liquid extraction needle 3 to a position that does not affect the use of the coating head 1, and then the control system controls the coating head 1 to lift and perform subsequent process work.

[0048] The above description is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0049] It should be understood that the present invention is not limited to the above description and that various modifications and changes can be made without departing from the scope of the present invention. The scope of the present invention is limited only by the appended claims.

Claims

1. A coating device for preventing liquid accumulation in perovskite coating, characterized in that: The invention comprises a coating head (1) for coating a perovskite light absorbing layer, and a liquid extraction device (2) fixed on the coating head (1) and located on a side wall in the movement direction of the coating head (1); the liquid extraction device (2) is provided with a plurality of liquid extraction needles (3) for absorbing liquid remaining on a glass substrate at the end of coating the perovskite light absorbing layer; the movement of the coating head (1) and the liquid extraction by the liquid extraction needles (3) are both controlled by a control system.

2. The coating device according to claim 1, characterized in that: The liquid extraction needle (3) is fixedly provided with a rocker (8) for driving the liquid extraction needle (3) to rise and fall, and each liquid extraction needle (3) is fixedly connected to the rocker (8).

3. The coating device according to claim 2, characterized in that: A push rod (7) is provided on the side wall of the liquid extraction device (2). The push rod (7) drives the liquid extraction needle (3) to move up and down by telescopically driving a rocker (8). The telescopic movement of the push rod (7) is controlled by a control system.

4. The coating device according to claim 3, characterized in that: There are two push rods (7) symmetrically arranged on both sides of the liquid extraction device (2). The two push rods (7) are extended and retracted at the same time and act on the rocker (8) to realize the lifting and lowering of the liquid extraction needle (3).

5. The coating device according to claim 2, characterized in that: The rocker (8) is hinged to one end of the shift lever, and the other end of the shift lever is hinged to the side wall of the liquid extraction device (2). The shift lever is manually adjusted to drive the rocker (8) to drive the liquid extraction needle (3) to move up and down.

6. The coating device according to claim 1, characterized in that: Each of the liquid extraction needles (3) is provided with a liquid extraction pump (4); the liquid extraction pump (4) is fixedly arranged in the liquid extraction device (2) and is controlled to be opened and closed by a control system.

7. The coating device according to claim 6, characterized in that: The liquid pumping device (2) is further provided with a liquid storage chamber (5) which is in communication with the liquid pump (4).

8. The coating device according to claim 6, characterized in that: The liquid extraction pump (4) is connected to the liquid extraction needle (3) via a flexible pipeline.

9. The coating device according to claim 1, characterized in that: The liquid extraction device (2) is also provided with a liquid extraction tube (6) for outputting the accumulated fluid sucked out by the liquid extraction needle (3) out of the liquid extraction device (2).

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