Wet film drying equipment of silicon heterojunction solar cell
By designing equipment that parallel conveyor belts and wet film drying devices, the existing silicon heterojunction solar cell wet film drying equipment has solved the problems of large size, long process time and high cost, and achieved more stable and controllable drying process, shortens time and reduces equipment size and cost.
Patent Information
- Application Number
- CN202421108587.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing silicon heterojunction solar cell wet film drying equipment has huge size, long process time, high cost, and unstable drying process.
A device including a parallel conveyor belt, wet film drying device, telescopic support column, electric thimble, controller and power supply module is designed. The belt lifting and lowering is controlled through the telescopic support column, the electric thimble lifts the battery cell, and uses infrared sensors and electric heating plates. Achieve hot drying and stable transmission, reducing equipment size and cost.
The drying time of wet film is shortened by 10% to 20%, improving the stability and controllability of the drying process, reducing the size and cost of the equipment, and improving practicality.
Smart Images
Figure CN222282045U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of silicon heterojunction solar cell production equipment, in particular to wet film drying equipment for silicon heterojunction solar cells. Background Art
[0002] Silicon heterojunction solar cells have gradually established a significant dominant position in the photovoltaic industry due to their advantages such as high conversion efficiency, low temperature coefficient, no LID and PID attenuation, etc. When preparing the pattern of the electroplated grid electrode of silicon heterojunction solar cells, it is necessary to prepare masks on both the front and back sides of the silicon cell using dry film and wet film ink lithography, where the wet film is coated on the cell using a screen printing process, and then dried in an oven or drying furnace for 15 minutes for preliminary curing, and then exposed and developed to obtain the pattern.
[0003] The existing method for drying wet film inks uses a tunnel oven or a drying furnace, which is characterized by rapid wafer production. However, the production equipment is huge in size. The equipment that meets the production capacity of 7,000 batteries per hour is more than 10 meters long, with a long process time and high cost. Utility Model Content
[0004] The utility model aims to improve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a wet film drying device for silicon heterojunction solar cells.
[0005] According to the wet film drying device of the silicon heterojunction solar cell of the first aspect of the present utility model, it comprises:
[0006] Conveyor belts arranged in parallel are used to place battery cells, and a bearing is provided in the middle of the driving roller of the conveyor belts;
[0007] A wet film drying device, the wet film drying device is arranged closely below the conveyor belt on which the battery sheets are placed, and the surface of the wet film drying device is provided with grooves matching the conveyor belt;
[0008] A telescopic support column, wherein the telescopic support column has a telescopic rod, and the end of the telescopic rod is connected to the bearing through a bent rod, and is used to control the lifting and lowering of the conveyor belt;
[0009] At least three electric ejectors, which can pass through the upper surface of the wet film drying device and extend above the conveyor belt;
[0010] A controller, wherein the controller is disposed inside the wet film drying device and is electrically connected to the wet film drying device, the telescopic support column and the electric ejector;
[0011] A power module is disposed inside the wet film drying device and is electrically connected to the controller.
[0012] According to the wet film drying equipment for silicon heterojunction solar cells of the embodiment of the utility model, the conveyor belt is controlled to rise and fall by the telescopic support column, so that the battery cell can be transferred to the upper surface of the wet film drying device for heat drying. After the heat drying is completed, the battery cell can be lifted by the electric ejector. At the same time, the telescopic support column slowly rises to support and transfer the battery cell to the next process, thereby completing the wet film drying operation of the silicon heterojunction solar cell. The utility model has a simple structure, small size and low cost. Compared with a large tunnel furnace, the wet film drying time is reduced by 10% to 20%, the drying process is more stable and controllable, and the practicability is strong.
[0013] In a possible implementation of the first aspect, the depth of the groove is lower than the height of the conveyor belt lowered by the telescopic support column. When the telescopic support column is driven to lower the conveyor belt, the conveyor belt moves in the groove and will not drive the battery cell to continue to translate.
[0014] In a possible implementation of the first aspect, the interior of the wet film drying device is a cavity structure, the upper surface of the wet film drying device is a trough structure, an electric heating plate is embedded in the trough, and the electric heating plate is electrically connected to the controller to facilitate control and adjustment of the heating temperature of the battery cell wet film.
[0015] In a possible implementation of the first aspect, the upper surface of the wet film drying device and the electric heating plate are both provided with through grooves to facilitate the electric ejector to lift the battery sheet when the electric ejector is in operation to separate it from the conveyor belt.
[0016] In a possible implementation of the first aspect, the electric ejectors are distributed in a rectangular, annular or circular array, so that they are smoothly and evenly stressed when in contact with the battery cells, thereby improving the smoothness and stability of the equipment operation.
[0017] In a possible implementation of the first aspect, an infrared sensor is further included. The infrared sensors are arranged on both sides of the electric ejector. The infrared sensors are electrically connected to the controller to detect whether the battery cell is translated to above the electric ejector.
[0018] In a possible implementation manner of the first aspect, a spacing between the infrared sensors is smaller than a width of a cell.
[0019] In a possible implementation manner of the first aspect, a heat insulation board is provided in the internal cavity of the wet film drying device to separate the upper heat and improve the service life of the controller and the power module.
[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 It is a structural schematic diagram of a wet film drying device for a silicon heterojunction solar cell according to an embodiment of the utility model;
[0023] Figure 2 is a top view of a wet film drying device for a silicon heterojunction solar cell according to an embodiment of the utility model;
[0024] Figure 3 This is a schematic diagram of the internal structure of a wet film drying device of a wet film drying device for a silicon heterojunction solar cell according to an embodiment of the utility model;
[0025] Figure 4 It is a top view of a wet film drying device of a wet film drying device for a silicon heterojunction solar cell according to an embodiment of the utility model.
[0026] Reference numerals:
[0027] Conveyor belt 100, bearing 110, wet film drying device 200, electric heating plate 210, heat insulation plate 220, groove 230, telescopic support column 300, telescopic rod 310, electric ejector 400, battery cell 500, infrared sensor 600, controller 700, power module 800. DETAILED DESCRIPTION
[0028] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific implementations and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0031] The terms "first", "second", "third", etc. in the specification and claims of the present application and the drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a series of steps or units are included, or optionally, steps or units not listed are included, or optionally, other steps or units inherent to these processes, methods, products or devices are included.
[0032] Only the part relevant to the present application is shown in the accompanying drawings, but not all of the content. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processing or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. When its operation is completed, the process can be terminated, but it can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.
[0033] The terms "component", "module", "system", "unit", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or distributed between two or more computers. In addition, these units can be executed from various computer-readable media having various data structures stored thereon. Units can communicate through local and / or remote processes, for example, based on signals having one or more data packets (e.g., data from a second unit interacting with another unit in a local system, a distributed system, and / or a network. For example, the Internet interacts with other systems via signals).
[0034] Example 1
[0035] See also Figures 1 to 4 As shown, this embodiment provides a wet film drying device for a silicon heterojunction solar cell, which includes:
[0036] The conveyor belts 100 are arranged in parallel and are used to place the battery cells 500. A bearing 110 is provided in the middle of the driving roller of the conveyor belt 100. In this embodiment, the conveying speed of the conveyor belt 100 is controlled to be adjustable within a range of 0 to 1 m / s.
[0037] A wet film drying device 200, which is arranged closely below the conveyor belt 100 on which the battery cells 500 are placed, and a groove 230 matching the conveyor belt 100 is arranged on the surface of the wet film drying device 200;
[0038] A telescopic support column 300, wherein the telescopic support column 300 has a telescopic rod 310, and the end of the telescopic rod 310 is connected to the bearing 110 through a bent rod, and is used to control the lifting and lowering of the conveyor belt 100;
[0039] At least three electric ejectors 400, the electric ejectors 400 can pass through the upper surface of the wet film drying device 200 and extend to above the conveyor belt 100;
[0040] A controller 700, wherein the controller 700 is disposed inside the wet film drying device 200, and the controller 700 is electrically connected to the wet film drying device 200, the telescopic support column 300, and the electric ejector 400;
[0041] A power module 800 is disposed inside the wet film drying device 200 , and the power module 800 is electrically connected to the controller 700 .
[0042] According to the wet film drying equipment for silicon heterojunction solar cells of the embodiment of the utility model, the conveyor belt is controlled to rise and fall by the telescopic support column, so that the battery cell can be transferred to the upper surface of the wet film drying device for heat drying. After the heat drying is completed, the battery cell can be lifted by the electric ejector. At the same time, the telescopic support column slowly rises to support and transfer the battery cell to the next process, thereby completing the wet film drying operation of the silicon heterojunction solar cell. The utility model has a simple structure, small size and low cost. Compared with a large tunnel furnace, the wet film drying time is reduced by 10% to 20%, the drying process is more stable and controllable, and the practicability is strong.
[0043] It should be noted that the depth of the groove 230 is lower than the height of the telescopic support column 300 to lower the conveyor belt 100. When the telescopic support column 300 is driven to lower the conveyor belt 100, the conveyor belt 100 moves in the groove 230 and will not drive the battery cell 500 to continue to translate.
[0044] It should be noted that the interior of the wet film drying device 200 is a cavity structure, and the upper surface of the wet film drying device 200 is a trough structure. An electric heating plate 210 is embedded in the trough. The electric heating plate 210 is electrically connected to the controller 700 to facilitate control and adjustment of the heating temperature of the battery cell wet film.
[0045] Furthermore, in this embodiment, the temperature control range of the electric heating plate 210 is 0-200° C., which is beneficial to improving the wet film drying efficiency of the battery cell.
[0046] It should be noted that the upper surface of the wet film drying device 200 and the electric heating plate 210 are both provided with through grooves, so that the electric ejector 400 can lift up the battery cell 500 when in operation, so as to separate it from the conveyor belt 100 .
[0047] It should be noted that the electric ejector pins 400 are distributed in a rectangular, annular or circular array, so that the electric ejector pins 400 can be subjected to a steady and uniform force when in contact with the battery cell 500, thereby improving the smoothness and stability of the equipment operation.
[0048] In this embodiment, the battery cell 500 is transported forward to a certain position via the conveyor belt 100, and the telescopic support column 300 lowers the conveyor belt 100 to store it in the groove 230 of the wet film drying device 200, so that the battery cell 500 moves down to contact the wet film drying device 200, and the ink on the battery cell 500 is heated and dried by heat conduction. After the drying is completed, the electric ejector 400 in the wet film drying device 200 will push the battery cell 500 upward, and at the same time, the conveyor belt 100 will lift the battery cell 500 upward and transfer it directly to the next process. The process time of the wet film drying process performed by the equipment of this embodiment is 1 / 10~1 / 5 of that of the traditional tunnel drying furnace, and the size of the equipment is also reduced to 1 / 6.
[0049] Example 2
[0050] See also Figure 2 As shown, this embodiment is further optimized on the basis of embodiment 1, and further includes an infrared sensor 600. The infrared sensors 600 are arranged on both sides of the electric ejector 400. The infrared sensors 600 are electrically connected to the controller 700 to facilitate the detection of whether the battery cell 500 is translated to above the electric ejector 400.
[0051] It should be noted that the spacing between the infrared sensors 600 is smaller than the width of the battery cell 500 .
[0052] Example 3
[0053] See also Figure 3 As shown, this embodiment is further optimized on the basis of the above embodiment. A heat insulation plate 220 is provided in the internal cavity of the wet film drying device 200 to separate the upper heat and improve the service life of the controller 700 and the power module 800.
[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the utility model.
[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
[0056] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification is not necessarily the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0057] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A wet film drying device for silicon heterojunction solar cells, characterized in that: include: Conveyor belts (100) arranged in parallel are used to place battery sheets (500), and a bearing (110) is provided in the middle of a driving roller of the conveyor belts (100); A wet film drying device (200), the wet film drying device (200) being arranged below the conveyor belt (100), and a groove (230) matching the conveyor belt (100) being arranged on a surface of the wet film drying device (200); A telescopic support column (300), the telescopic support column (300) having a telescopic rod (310), the end of the telescopic rod (310) being connected to the bearing (110) via a bent rod; At least three electric ejectors (400), wherein the electric ejectors (400) can pass through the upper surface of the wet film drying device (200) and extend to above the conveyor belt (100); A controller (700), the controller (700) being arranged inside the wet film drying device (200), the controller (700) being electrically connected to the wet film drying device (200), the telescopic support column (300) and the electric ejector pin (400); A power module (800), the power module (800) being arranged inside the wet film drying device (200), and the power module (800) being electrically connected to the controller (700).
2. The wet film drying equipment for silicon heterojunction solar cells according to claim 1, characterized in that: The depth of the groove (230) is lower than the height at which the telescopic support column (300) lowers the conveyor belt (100).
3. The wet film drying equipment for silicon heterojunction solar cells according to claim 1, characterized in that: The interior of the wet film drying device (200) is a cavity structure, the upper surface of the wet film drying device (200) is a sink structure, an electric heating plate (210) is embedded in the sink, and the electric heating plate (210) is electrically connected to the controller (700).
4. The wet film drying device for silicon heterojunction solar cells according to claim 3, characterized in that: The upper surface of the wet film drying device (200) and the electric heating plate (210) are both provided with through grooves.
5. The wet film drying equipment for silicon heterojunction solar cells according to claim 1, characterized in that: The electric ejectors (400) are distributed in a rectangular, annular or circular array.
6. The wet film drying equipment for silicon heterojunction solar cells according to claim 1, characterized in that: It also includes an infrared sensor (600), which is disposed on both sides of the electric ejector (400), and the infrared sensor (600) is electrically connected to the controller (700).
7. The wet film drying equipment for silicon heterojunction solar cells according to claim 6, characterized in that: The spacing between the infrared sensors (600) is smaller than the width of the battery sheet (500).
8. The wet film drying equipment for silicon heterojunction solar cells according to claim 3, characterized in that: A heat insulation board (220) is provided in the internal cavity of the wet film drying device (200).