Roll-to-roll annealing method

Abstract

The invention discloses a roll-to-roll annealing method. A roll-to-roll annealing system comprises a roll-to-roll annealing chamber, an unwinding mechanism, a winding mechanism and a coating head, a layer of annular heating chamber and a layer of annular cooling chamber are arranged in the roll-to-roll annealing chamber; the unwinding mechanism is arranged on one side of the roll-to-roll annealing chamber; the winding mechanism is arranged in the roll-to-roll annealing chamber; the coating head is arranged on the same side of the roll-to-roll annealing chamber and the unwinding mechanism; the roll-to-roll annealing method comprises the following steps: releasing a to-be-treated perovskite solar cell panel by an unwinding mechanism, and coating the upper surface of the to-be-treated perovskite solar cell panel with a solvent through a coating head; then entering a heating chamber for heating treatment; then entering a cooling chamber for cooling treatment; and finally, the winding mechanism is used for winding. Through the arrangement, a certain space is saved, the space utilization rate is increased, uniform annealing can be achieved, different connection devices can be adapted, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, and in particular to a roll-to-roll annealing method. Background Art

[0002] As a new type of solar cell, perovskite solar cells have attracted great attention in the photovoltaic field due to their advantages such as high energy conversion efficiency, low cost, low-temperature preparation, and flexible components.

[0003] Lightweight and flexible perovskite solar cells have broad prospects in building integrated photovoltaics, wearable electronics, portable energy systems and aerospace applications. Flexible perovskite solar modules can be quickly produced through a roll-to-roll process to achieve the industrial application of perovskite solar panels. For the functional layers of different types of perovskite solar panels, such as titanium oxide layers, nickel oxide layers, and functional layers prepared from various oxides, they all need to be uniformly annealed by roll-to-roll unfolding, and even annealed under a protective atmosphere. At present, commonly used annealing devices can only match the production speed of the previous process by continuously increasing the number of furnace bodies, which will seriously restrict the production rhythm of the battery or the annealing equipment will occupy a large area, which is very unfavorable to the production line layout and actual production efficiency. Summary of the invention

[0004] In view of this, the present application provides a roll-to-roll annealing method, which saves a certain amount of space by setting a cooling chamber in a heating chamber.

[0005] According to one aspect of the present application, a roll-to-roll annealing method is provided, which is applicable to the production of a production line of a flexible perovskite film layer, and a roll-to-roll annealing system is used to anneal a solar cell panel to be processed; the roll-to-roll annealing system comprises a roll-to-roll annealing chamber, a reeling mechanism, a reeling mechanism and a coating head; at least two layers of annular chambers are arranged inside the roll-to-roll annealing chamber, including an annular heating chamber and an annular cooling chamber, and the flexible perovskite solar cell panel to be processed can be moved along an annular path in the heating chamber and the cooling chamber for heating and cooling; the reeling mechanism is rotatably arranged on one side of the roll-to-roll annealing chamber; the reeling mechanism The coating head is rotatably arranged inside the roll-to-roll annealing chamber; the coating head is arranged on the same side of the roll-to-roll annealing chamber and the unwinding mechanism; the roll-to-roll annealing method comprises the following steps: the unwinding mechanism releases the perovskite solar cell panel to be processed, and the coating head applies a solvent to the upper surface of the perovskite solar cell panel to be processed; the perovskite solar cell panel processed by the coating head enters the heating chamber for heating treatment; the perovskite solar cell panel after heating treatment enters the cooling chamber for cooling treatment; the cooled perovskite solar cell panel is collected by the winding mechanism.

[0006] In a possible implementation, the roll-to-roll annealing system further includes a guide roller, which is disposed on one side of the unwinding mechanism; the roll-to-roll annealing method further includes the following steps: the unwinding mechanism releases the perovskite solar cell panel to be processed, passes through the coating head through the guide roller, and the coating head applies a solvent to the upper surface of the perovskite solar cell panel.

[0007] In a possible implementation, the roll-to-roll annealing system further includes an air knife, which is disposed between the coating head and the roll-to-roll chamber; the roll-to-roll annealing method further includes the following steps: the perovskite solar cell panel coated with a solvent passes through the air knife, and the air knife evenly blows the upper surface of the perovskite solar cell panel to provide a uniform airflow environment.

[0008] In a possible implementation, the perovskite solar cell panel after being blown by the air knife enters the heating chamber of the roll-to-roll annealing chamber for heating treatment.

[0009] In a possible implementation, the roll-to-roll annealing system further includes a transmission roller, which is arranged in the heating chamber and the cooling chamber; the roll-to-roll annealing method further includes the following steps: the perovskite solar cell panel enters the cooling chamber after circling a preset number of times in a circular path in the heating chamber via the transmission roller.

[0010] In a possible implementation, after the heated perovskite solar cell panel enters the cooling chamber through the transmission roller, the transmission roller travels around a preset number of circles in a circular path in the cooling chamber.

[0011] In a possible implementation, the time that the perovskite solar cell panel is in the heating chamber and the time that the perovskite solar cell panel is in the cooling chamber is 10 minutes to 300 minutes.

[0012] In a possible implementation, the cooled perovskite solar cell panel enters the winding mechanism through a transmission roller, and the annealed perovskite solar cell panel is collected by the winding mechanism.

[0013] In a possible implementation, the perovskite solar cell panel travels around the heating chamber in a circular path twice before entering the cooling chamber.

[0014] In a possible implementation, the perovskite solar cell panel entering the cooling chamber makes a circle in a circular path in the cooling chamber.

[0015] The beneficial effects of the present invention are as follows: by setting a roll-to-roll annealing chamber, the perovskite solar cell panel is heated and cooled in the roll-to-roll annealing chamber to complete annealing, a unwinding mechanism and a rewinding mechanism are set, the unwinding mechanism is used to release the perovskite solar cell panel to be processed, and the rewinding mechanism is used to collect the perovskite cell panel after annealing, and a coating head is set to be suitable for applying the solvent used for production to the perovskite solar cell panel; after the perovskite solar cell panel is released by the unwinding mechanism, the solvent is applied by the coating head, and through the annealing step: the unwinding mechanism releases the perovskite solar cell panel to be processed, passes through the coating head; after passing through the coating head, it enters the heating chamber for heating; the heated perovskite solar cell panel enters the cooling chamber for cooling; the cooled perovskite solar cell panel is collected by the rewinding mechanism; through the above settings, the present application can not only obtain a complete perovskite film, but also save production space and improve space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram showing the specific structure of a roll-to-roll continuous annealing system according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it is necessary to understand that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "join", "hinge", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1As shown, the roll-to-roll continuous annealing system is suitable for the production line of flexible perovskite film layers, and the roll-to-roll annealing system is used to anneal the solar cell panel to be processed; the roll-to-roll annealing system includes a roll-to-roll annealing chamber, a reeling mechanism 320, a reeling mechanism 310 and a coating head 410; at least two layers of annular chambers are arranged inside the roll-to-roll annealing chamber, including an annular heating chamber 140 and an annular cooling chamber 150, and the flexible perovskite solar cell panel to be processed can move in the annular paths of the heating chamber 140 and the cooling chamber for heating and cooling; the reeling mechanism 320 is rotatably arranged on one side of the roll-to-roll annealing chamber; the reeling mechanism 310 is rotatable The roll-to-roll annealing chamber is provided with a coating head 410 on the same side of the roll-to-roll annealing chamber and the unwinding mechanism 320; the roll-to-roll annealing method comprises the following steps: the unwinding mechanism 320 releases the perovskite solar cell panel to be processed, and the coating head 410 applies a solvent to the upper surface of the perovskite solar cell panel to be processed; the perovskite solar cell panel processed by the coating head 410 enters the heating chamber 140 for heating treatment; the perovskite solar cell panel after the heating treatment enters the cooling chamber 150 for cooling treatment; the cooled perovskite solar cell panel is collected by the winding mechanism 310.

[0023] Specifically, Figure 1 As shown, a first baffle plate 110, a second baffle plate 120 and a third baffle plate 130 are provided, and the second baffle plate 120 is sleeved on the inner side of the first baffle plate 110, so that there is a certain distance between the first baffle plate 110 and the second baffle plate 120, and the third baffle plate 130 is sleeved on the inner side of the second baffle plate 120, and there is a certain distance between the second baffle plate 120 and the third baffle plate 130, so that a heating chamber 140 is formed between the first baffle plate 110 and the second baffle plate 120, and a heating chamber 140 is formed between the second baffle plate 120 and the third baffle plate 130. The cooling chamber 150 is formed to form an annealing chamber for annealing the perovskite solar cell panel. The first baffle plate 110, the second baffle plate 120 and the third baffle plate 130 are all arranged in an annular structure, so that the heating chamber 140 and the cooling chamber 150 are both formed into an annular structure. Such an arrangement enables the perovskite solar cell panel to form an annular movement in the heating chamber 140 and the cooling chamber 150, and pass through the heating chamber 140 and the cooling chamber 150 in turn, saving a certain amount of space and enabling uniform annealing;

[0024] According to the above configuration, the unwinding mechanism 320 releases the perovskite solar panel to be processed, and the perovskite solar panel to be processed passes through the coating head 410, and the coating head 410 applies a solvent to the upper surface of the perovskite solar panel to be processed. The perovskite solar panel coated with the solvent enters the heating chamber 140 for heating treatment, and then enters the cooling chamber 150 for cooling treatment. The perovskite solar panel after cooling treatment is finally collected by the winding mechanism 310 to complete the annealing of the perovskite solar panel.

[0025] In a possible implementation, the roll-to-roll annealing system further includes a guide roller 210, which is disposed on one side of the unwinding mechanism 320; the roll-to-roll annealing method further includes the following steps: the unwinding mechanism 320 releases the perovskite solar cell panel to be processed, passes through the guide roller 210 through the coating head 410, and the coating head 410 applies a solvent to the upper surface of the perovskite solar cell panel.

[0026] Specifically, Figure 1 As shown, in order to be able to introduce the perovskite solar cell panel to be processed into the heating chamber 140, a guide roller 210 is set. The guide roller 210 is set in multiple ways. The position of the guide roller 210 can be adjusted according to needs. The guide roller 210 guides the perovskite solar cell panel. When the unwinding mechanism 320 releases the perovskite solar cell panel to be processed, it is guided by the guide roller 210 and passes through the coating head 410.

[0027] In a possible implementation, the roll-to-roll annealing system further includes an air knife 420, which is disposed between the coating head 410 and the roll-to-roll chamber; the roll-to-roll annealing method further includes the following steps: the perovskite solar cell panel coated with the solvent passes through the air knife 420, and the air knife 420 evenly blows the upper surface of the perovskite solar cell panel to provide a uniform airflow environment.

[0028] Specifically, the air knife 420 is suitable for volatilizing the solvent on the perovskite solar cell panel, and the perovskite solar cell panel enters the heating chamber 140 after passing through the coating head 410 and the air knife 420; the perovskite solar cell panel after being blown by the air knife 420 enters the heating chamber 140 of the roll-to-roll annealing chamber for heating treatment.

[0029] In one possible implementation, the roll-to-roll annealing system further includes a drive roller 220, which is disposed in the heating chamber 140 and the cooling chamber 150; the roll-to-roll annealing method further includes the following steps: the perovskite solar cell panel passes through the drive roller 220 in a circular path in the heating chamber 140 for a preset number of turns and then enters the cooling chamber 150.

[0030] Specifically, Figure 1 As shown, because the perovskite solar cell panel needs to enter the cooling chamber 150 from the heating chamber 140, the driving roller 220 of the heating chamber 140 is initially arranged on the inner side of the first baffle plate 110 and near the through channel of the first baffle plate 110, and then arranged in a circular manner along the inner side of the first baffle plate 110 toward the outer peripheral side of the second baffle plate 120, and the driving roller 220 of the heating chamber 140 ends on the outer side of the second baffle plate 120 and near the through channel of the second baffle plate 120, so as to facilitate the perovskite solar cell panel to enter the cooling chamber 150.

[0031] In a possible implementation, after the heated perovskite solar cell panel enters the cooling chamber 150 through the transmission roller 220 , the transmission roller 220 circulates a preset number of times in a circular path in the cooling chamber 150 .

[0032] Specifically, Figure 1 As shown, after the perovskite solar cell panel is cooled in the cooling chamber 150, it is rolled up by the winding mechanism 310, so the driving roller 240 of the cooling chamber 150 is initially arranged on the inner side of the second baffle plate 120 and near the through channel of the second baffle plate 120, and then arranged in a circular manner along the inner side of the third baffle plate 120 to the outer peripheral side of the third baffle plate 130, and the driving roller 240 of the cooling chamber 150 ends on the outer side of the third baffle plate 130 and near the through channel of the third baffle plate 130, so as to facilitate the perovskite solar cell panel to enter the third baffle plate 130 and connect with the winding mechanism 310.

[0033] In a possible implementation, the time that the perovskite solar cell panel is in the heating chamber 140 and the cooling chamber 150 is 10 minutes to 300 minutes.

[0034] Specifically, according to the temperature of the perovskite solar cell panel, which is 50 degrees Celsius to 700 degrees Celsius, the annealing time is also different, ranging from 10 minutes to 300 minutes.

[0035] In a possible implementation, the cooled perovskite solar cell panel enters the winding mechanism 310 through the transmission roller 220 , and the annealed perovskite solar cell panel is collected by the winding mechanism 310 .

[0036] In a possible implementation, the perovskite solar cell panel 140 makes two circles in a circular path in the heating chamber 140 and then enters the cooling chamber 150 ; the perovskite solar cell panel that enters the cooling chamber 150 makes one circle in a circular path in the cooling chamber 150 .

[0037] Specifically, Figure 1 As shown, Figure 1This is an embodiment, but is not limited to this embodiment. After the perovskite solar cell panel enters the heating chamber 140, it goes around twice in the heating chamber 140 along the setting direction of the transmission roller 220 and then enters the cooling chamber 150; after entering the cooling chamber 150, it goes around once in the cooling chamber 150 along the setting direction of the transmission roller 220 and then is collected by the winding mechanism 310.

[0038] In a possible implementation, the roll-to-roll annealing method includes the following steps: the heating chamber 140 and the cooling chamber 150 are configured as vacuum chambers or gas chambers through an inflation device and an exhaust device according to the needs of the equipment in the previous step; the drive roller 240 adjusts the spacing and the number of turns as needed; the unwinding mechanism 320 releases the perovskite solar cell panel to be annealed; the non-film side of the perovskite solar cell panel contacts the guide roller 210; the perovskite solar cell panel enters the heating chamber 140 through the through-channel of the first baffle plate 110 under the guidance of the guide roller 210; the perovskite solar cell panel enters the cooling chamber 150 through the transmission of the drive roller 240; finally, the perovskite solar cell panel passes through the through-channel of the third baffle plate 130 and is connected to the winding mechanism 310, and the annealed perovskite solar cell panel is wound up by the winding mechanism 310.

[0039] When using the present application, firstly, according to the actual situation, choose to use a vacuum heating chamber 140 and a vacuum cooling chamber 150 or a heating chamber 140 containing gas and a cooling chamber 150 containing gas.

[0040] The unwinding mechanism 510 is installed at a suitable position, and the perovskite solar cell panel is placed through the unwinding mechanism 510 and guided by the guide roller 210, and the surface of the perovskite solar cell panel with the film does not contact the guide roller 210. The perovskite solar cell panel is driven by the guide roller 210 to pass through the heating chamber 300 and the cooling chamber 400 at a uniform speed for annealing, and finally reaches the rewinding mechanism 520.

[0041] The present application is provided with a base 500, a roll-to-roll annealing system, an unwinding mechanism 320, a winding mechanism 310 and a coating head 410, in order to save a certain amount of space and facilitate the winding mechanism 310 to wind up the perovskite solar cell panel; the guide roller 210 is provided to guide the perovskite solar cell panel into the heating chamber 140, and the transmission roller 240 is provided to enable the perovskite solar cell panel to move in the heating chamber 140 and the cooling chamber 150. The coating head 410 and the wind knife 420 are provided on the outside of the first baffle plate 110 to apply the solvent to the perovskite solar cell panel and volatilize the solvent, and finally form a complete perovskite solar cell panel film; the present application not only saves a certain amount of space and improves the space utilization rate through the above settings, but also can anneal evenly and adapt to different connection equipment, and has higher practicality, and solves the technical problem that the annealing equipment can only match the production speed of the previous process by continuously increasing the number of furnace bodies, which will seriously restrict the production rhythm of the battery or the annealing equipment will occupy a very large area.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A roll-to-roll annealing method, suitable for the production of a flexible perovskite film production line, characterized in that: Annealing the solar panel to be processed using a roll-to-roll annealing system; The roll-to-roll annealing system comprises a roll-to-roll annealing chamber, an unwinding mechanism, a winding mechanism and a coating head; At least two layers of annular chambers are arranged inside the roll-to-roll annealing chamber, including an annular heating chamber and an annular cooling chamber, and the flexible perovskite solar cell panel to be processed can be moved along an annular path in the heating chamber and the cooling chamber for heating and cooling; The unwinding mechanism is rotatably arranged on one side of the roll-to-roll annealing chamber; The winding mechanism is rotatably disposed inside the roll-to-roll annealing chamber; The coating head is arranged on the same side of the roll-to-roll annealing chamber and the unwinding mechanism; The roll-to-roll annealing method comprises the following steps: The unwinding mechanism releases the perovskite solar cell panel to be processed, and passes through the coating head, and the coating head applies a solvent to the upper surface of the perovskite solar cell panel to be processed; The perovskite solar cell panel processed by the coating head enters the heating chamber for heating treatment; The perovskite solar cell panel after the heating treatment enters the cooling chamber for cooling treatment; The cooled perovskite solar cell panel is collected by the winding mechanism.

2. The roll-to-roll continuous annealing method according to claim 1, characterized in that: The roll-to-roll annealing system further includes a guide roller, which is arranged on one side of the unwinding mechanism; The roll-to-roll annealing method further comprises the following steps: the unwinding mechanism releases the perovskite solar cell panel to be processed, passes through the coating head via a guide roller, and the coating head applies a solvent to the upper surface of the perovskite solar cell panel.

3. The roll-to-roll continuous annealing method according to claim 2, characterized in that: The roll-to-roll annealing system further comprises an air knife, wherein the air knife is arranged between the coating head and the roll-to-roll chamber; The roll-to-roll annealing method further includes the following steps: the perovskite solar cell panel coated with a solvent passes through the air knife, and the air knife evenly blows the upper surface of the perovskite solar cell panel to provide a uniform airflow environment.

4. The roll-to-roll continuous annealing method according to claim 3, characterized in that: After being blown by the air knife, the perovskite solar cell panel enters the heating chamber of the roll-to-roll annealing chamber for heating treatment.

5. The roll-to-roll continuous annealing method according to claim 4, characterized in that: The roll-to-roll annealing system further includes a transmission roller, wherein the transmission roller is disposed in the heating chamber and the cooling chamber; The roll-to-roll annealing method further includes the following steps: the perovskite solar cell panel enters the cooling chamber after circling a preset number of times in a circular path in the heating chamber via a transmission roller.

6. The roll-to-roll continuous annealing method according to claim 5, characterized in that: After the heated perovskite solar cell panel enters the cooling chamber through the transmission roller, the transmission roller makes a preset number of turns in a circular path in the cooling chamber.

7. The roll-to-roll continuous annealing method according to claim 6, characterized in that: The time that the perovskite solar cell panel is in the heating chamber and the time that the perovskite solar cell panel is in the cooling chamber is 10 minutes to 300 minutes.

8. The roll-to-roll continuous annealing method according to claim 7, characterized in that: The cooled perovskite solar cell panel enters the winding mechanism through a transmission roller, and the annealed perovskite solar cell panel is collected by the winding mechanism.

9. The roll-to-roll continuous annealing method according to claim 5, characterized in that: The perovskite solar cell panel enters the cooling chamber after making two circles in the circular path in the heating chamber.

10. The roll-to-roll continuous annealing method according to claim 6, characterized in that: The perovskite solar cell panel entering the cooling chamber makes a circle in a circular path in the cooling chamber.

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