CN220253213U - Transmission mechanism for producing solar cells and production system - Google Patents
Transmission mechanism for producing solar cells and production system Download PDFInfo
- Publication number
- CN220253213U CN220253213U CN202321931424.0U CN202321931424U CN220253213U CN 220253213 U CN220253213 U CN 220253213U CN 202321931424 U CN202321931424 U CN 202321931424U CN 220253213 U CN220253213 U CN 220253213U
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- China
- Prior art keywords
- roller
- solar cell
- compression bar
- silicon wafer
- rollers
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 48
- 230000007246 mechanism Effects 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 66
- 239000010703 silicon Substances 0.000 claims abstract description 66
- 235000012431 wafers Nutrition 0.000 claims abstract description 64
- 230000006835 compression Effects 0.000 claims abstract description 45
- 238000007906 compression Methods 0.000 claims abstract description 45
- 230000007723 transport mechanism Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 abstract description 18
- 238000005530 etching Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010020 roller printing Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
- Photovoltaic Devices (AREA)
Abstract
The application provides a transmission mechanism for producing solar cells and a production system. The transmission mechanism comprises a roller assembly and at least two transmission shafts; the roller assembly comprises a compression bar roller and a support roller which are respectively sleeved on different transmission shafts, and a transmission channel for transmitting solar cell silicon wafers is formed between the compression bar roller and the support roller; the longitudinal section of the compression bar roller comprises an arc section, and the length of the arc section is smaller than half of the circumference. According to the transmission mechanism for producing the solar cell, the length of the circular arc section of the longitudinal section of the pressing rod roller is designed to be smaller than one half of the circumferential length, the circular arc section is formed into a semi-oval shape, and compared with the pressing rod roller with the circular arc section being semicircular, the contact area of the pressing rod roller and the solar cell silicon wafer can be increased, so that the pressure born by the solar cell silicon wafer is reduced, and roller marks on the surface of the solar cell silicon wafer are reduced or even eliminated as much as possible.
Description
Technical Field
The application relates to the technical field of solar cells, in particular to a transmission mechanism for producing solar cells and a production system.
Background
Solar cells are used to convert the light of the sun directly into electrical energy for use by electrical appliances. The silicon wafer of the traditional solar cell needs to be subjected to the steps of texturing cleaning, diffusion, etching, film deposition, printing, sintering and the like. The etching and cleaning process comprises the steps of firstly corroding the surface of a silicon wafer by a chemical reagent to form an uneven textured surface on the surface of the silicon wafer, so as to increase the light absorption area of the silicon wafer, reduce the reflectivity of light and further improve the short-circuit current and the photoelectric conversion efficiency of a solar cell; and then cleaning by alkali liquor, acid liquor and pure water to remove impurities such as organic matters, metal particles and the like on the surface of the silicon wafer. After the silicon wafer is subjected to wool making and cleaning, forming a PN junction on the silicon wafer through a diffusion process, and removing a surrounding diffusion layer on the back surface of the silicon wafer through an etching process so as to insulate the front surface and the back surface of the silicon wafer; and depositing film layers with various functions on the silicon wafer through a film deposition process, and finally printing a grid line electrode on the surface of the silicon wafer through screen printing.
In the texturing and etching processes, the silicon wafer is typically moved by a chain conveyor. The chain type transmission mechanism forms a transmission channel of the silicon chip between the upper roller and the lower roller. And the upper roller in the traditional chain type transmission mechanism can form deeper roller marks on the surface of the silicon wafer after being contacted with the silicon wafer, so that the quality of the solar cell can be influenced.
Disclosure of Invention
The utility model provides a transport mechanism and production system for producing solar cell, this transport mechanism can reduce as far as possible even eliminate the gyro wheel print on solar cell silicon chip surface.
Specifically, the application is realized by the following technical scheme:
in one aspect, the present application provides a transfer mechanism for producing solar cells, comprising:
the roller assembly and at least two transmission shafts; the roller assembly comprises a compression bar roller and a support roller which are respectively sleeved on different transmission shafts, and a transmission channel for transmitting solar cell silicon wafers is formed between the compression bar roller and the support roller; the longitudinal section of the compression bar roller comprises an arc section, and the length of the arc section is smaller than half of the circumference.
Optionally, the length of the circular arc segment is greater than or equal to one-twelfth of the circumferential length.
Optionally, the length of the circular arc segment is greater than or equal to one eighth of the circumferential length and less than or equal to one sixth of the circumferential length.
Optionally, the roller assembly includes a plurality of compression bar rollers and a plurality of support rollers that are arranged at intervals, and the number of the compression bar rollers is smaller than that of the support rollers; and/or, the plurality of compression bar rollers and the plurality of support rollers are staggered.
Optionally, the roller assembly includes two compression bar rollers; in the process of conveying the solar cell silicon wafer, two compression bar rollers are distributed on two opposite sides of the central line of the solar cell silicon wafer.
Optionally, the two compression bar rollers are symmetrically distributed at the middle positions of the two opposite sides of the solar cell silicon wafer respectively.
Optionally, the compression bar roller is in clearance fit with the transmission shaft.
Optionally, the transmission mechanism further includes a limiting portion disposed on two opposite sides of the compression bar roller in a length direction of the transmission shaft, and configured to limit movement displacement of the compression bar roller.
Optionally, the material of the compression bar roller is polyethylene.
In another aspect the present application provides a production system for producing solar cells comprising a transport mechanism as described in any of the above.
The technical scheme that this application provided can reach following beneficial effect:
the application provides a transmission mechanism for producing solar cells and a production system. According to the transmission mechanism, the length of the arc section of the longitudinal section of the compression bar roller is designed to be smaller than one half of the length of the circumference, so that the arc section is formed into a semi-ellipse, and compared with the compression bar roller with the semicircular arc section, the contact area between the compression bar roller and the solar cell silicon wafer can be increased, so that the pressure applied to the solar cell silicon wafer is reduced, and roller marks on the surface of the solar cell silicon wafer are reduced or even eliminated as much as possible.
Drawings
Fig. 1 is a schematic partial structure view of a transfer mechanism for producing a solar cell according to an exemplary embodiment of the present application.
Fig. 2 is a longitudinal cross-sectional view of a plunger roller as shown in an exemplary embodiment of the present application.
Fig. 3 is a transverse cross-sectional view of a plunger roller as shown in an exemplary embodiment of the present application.
Reference numerals: 10. a transmission mechanism; 11. a compression bar roller; 111. a circular arc section; 112. a vertical section; 12. supporting rollers; 13. a transmission shaft; 14. a limit part; 15. a limiting piece; 20. and (5) a solar cell silicon wafer.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are merely illustrative of the concepts of the present application and are not representative of all implementations contemplated by the present application. Rather, they are merely examples of apparatus and methods that may be consistent with aspects of the present concepts.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper," "top," "bottom," and the like are merely for convenience of description and are not limited to one position or one spatial orientation. The terms "comprises," "comprising," or the like are intended to cover an element or article that is "comprising" or "includes" followed by another element or article that is "comprising" or "includes" and that is equivalent to the element or article, but does not exclude other elements or articles from the application. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The present application provides a production system for producing a solar cell (hereinafter simply referred to as "production system") including a transport mechanism 10 (hereinafter simply referred to as "transport mechanism 10") for producing a solar cell. In one embodiment, the production system includes a wool making washing apparatus in which the transfer mechanism 10 is disposed. In another embodiment, the production system includes an etching apparatus in which the transport mechanism 10 is disposed. Of course, this is not a limitation. It should be noted that the solar cell mentioned above may be a TOPCon cell, but is not limited thereto.
Referring to fig. 1 and 2, the transmission mechanism 10 includes a roller assembly and at least two transmission shafts 13; the roller assembly comprises a compression bar roller 11 and a support roller 12 which are respectively sleeved on different transmission shafts 13, and a transmission channel for transmitting the solar cell silicon wafer 20 is formed between the compression bar roller 11 and the support roller 12; the longitudinal section of the compression bar roller 11 comprises an arc section 111, and the length of the arc section 111 is less than half of the circumference length. The longitudinal section of the pressure bar roller 11 refers to the section of the pressure bar roller 11 in the axial direction.
When the solar cell silicon wafer 20 needs to be transported, all the transmission shafts 13 can be driven to rotate together, and then each transmission shaft 13 drives the compression bar roller 11 and the support roller 12 to rotate respectively, so that the solar cell silicon wafer 20 positioned between the compression bar roller 11 and the support roller 12 moves. In the process of moving the solar cell silicon wafer 20, when the circular arc section 111 of the longitudinal section of the pressing rod roller 11 is one half of the circumferential length, namely, the circular arc section 111 is circular, the pressing rod roller 11 and the solar cell silicon wafer 20 can be approximately regarded as point contact, so that the solar cell silicon wafer 20 is stressed more greatly, and a deeper roller mark is easily formed on the surface of the solar cell silicon wafer 20.
According to the scheme, the length of the arc section 111 of the longitudinal section of the compression bar roller 11 is designed to be smaller than one half of the circumferential length, so that the arc section 111 is formed into a semi-oval shape, and compared with the compression bar roller 11 with the arc section 111 being semicircular, the contact area between the compression bar roller 11 and the solar cell silicon wafer 20 can be increased, so that the pressure applied to the solar cell silicon wafer 20 is reduced, and roller marks on the surface of the solar cell silicon wafer 20 are reduced or even eliminated as much as possible.
In one embodiment, the length of the circular arc segment 111 is greater than or equal to one-twelfth of the circumferential length. As shown in fig. 2, the longitudinal section of the compression bar roller 11 is track-shaped, having a circular arc section 111 and a vertical section 112. When the length of the arc section 111 is more than or equal to twelve times of the circumferential length, the compression bar roller 11 and the solar cell silicon wafer 20 can be ensured to have a larger contact area, and the pressure born by the solar cell silicon wafer 20 is reduced; but also can avoid the too sharp included angle formed between the arc section 111 and the vertical section 112, thereby preventing the silicon wafer from being scratched by sharp corners and rubbing to generate roller marks in the conveying process. In one embodiment, the length of the circular arc segment 111 is greater than or equal to one eighth of the circumferential length and less than or equal to one sixth of the circumferential length. Therefore, the pressing bar roller 11 and the solar cell silicon wafer 20 can have a proper contact area, so that the pressure applied to the solar cell silicon wafer 20 can be reduced, and the movement of the solar cell silicon wafer 20 can be prevented from being influenced by the overlarge contact area.
Referring to fig. 1, in one embodiment, the roller assembly includes a plurality of pressing bar rollers 11 and a plurality of supporting rollers 12 disposed at intervals, and the number of pressing bar rollers 11 is smaller than the number of supporting rollers 12. Therefore, the stress surface of the solar cell silicon wafer 20 is prevented from being increased due to the excessive number of the press rod rollers 11, so that large-area roller printing is realized, and meanwhile, the stability of the solar cell silicon wafer 20 in the transmission process is ensured. For example, when the number of the support rollers 12 is 3, the number of the pressing lever rollers 11 may be 2; when the number of the support rollers 12 is 5, the number of the pressing lever rollers 11 may be 2, 3, or 4. Of course, this is not a limitation. In one embodiment, the rotational speeds of the plunger roller 11 and the support roller 12 are the same to reduce friction to a greater extent. Specifically, all the transmission shafts 13 can be connected by a connecting rod, and the connecting rod is driven to rotate by a motor, so that the same rotating speed of all the transmission shafts 13 is ensured, and the same rotating speed of the compression bar roller 11 and the support roller 12 is ensured.
In one embodiment, the pressing rod rollers 11 and the supporting rollers 12 are staggered, so that stress points of two different sides of the solar cell silicon wafer 20 can be staggered, and movement of the solar cell silicon wafer 20 is facilitated.
In one embodiment, the roller assembly comprises two compression bar rollers 11; in the process of conveying the solar cell silicon wafer 20, the two compression bar rollers 11 are distributed on two opposite sides of the central line of the solar cell silicon wafer 20. Thus, the pressure applied to the solar cell silicon wafer 20 can be dispersed, and the occurrence of deep roll marks on the surface of the solar cell silicon wafer 20 can be avoided as much as possible. In one embodiment, the two pressing bar rollers 11 are symmetrically distributed at the middle positions of two opposite sides of the solar cell silicon wafer 20. Thus, the pressure applied to the solar cell silicon wafer 20 can be uniformly dispersed, and the roller printing on the surface of the solar cell silicon wafer 20 can be further made shallow.
In one embodiment, the roller assembly includes five support rollers 12, the middle support roller 12 of the five support rollers 12 is disposed at the center line of the solar cell silicon wafer 20, and the remaining four support rollers 12 are uniformly distributed on opposite sides of the middle support roller 12 and are sequentially arranged at equal intervals in a direction away from the center line. Therefore, the stress of the solar cell silicon wafer 20 can be more uniform, and the stable transmission of the solar cell silicon wafer 20 is facilitated.
In one embodiment, the compression bar roller 11 is in clearance fit with the transmission shaft 13. Therefore, when the solar cell silicon wafer 20 is placed between the pressing rod roller 11 and the supporting roller 12, the pressing rod roller 11 can float upwards along the radial direction of the transmission shaft 13, so that the stress of the solar cell silicon wafer 20 is further reduced, and the roller printing on the surface of the solar cell silicon wafer 20 is shallower. For example, as shown in fig. 1 and 3, the inner diameter of the pressing bar roller 11 is R2, the diameter of the transmission shaft 13 is a, and the difference between R2 and a may be 0.1mm, but is not limited thereto.
With continued reference to fig. 1, in one embodiment, the transmission mechanism 10 further includes a limiting portion 14 disposed on two opposite sides of the pressing bar roller 11 along the length direction of the transmission shaft 13, for limiting the movement displacement of the pressing bar roller 11, so as to avoid deviating from the initial position along with the rotation of the pressing bar roller 11. Specifically, the limiting portion 14 may be a fixed block fixedly disposed on the transmission shaft 13, wherein the fixed block may have a ring shape, a bar shape, or the like, but is not limited thereto. Of course, in other embodiments, the transmission mechanism 10 further includes limiting members 15 disposed on opposite sides of the supporting roller 12 along the length direction of the transmission shaft 13, for limiting the movement displacement of the supporting roller 12, so as to avoid deviating from the initial position along with the rotation of the supporting roller 12. The specific structure of the limiting member 15 and the specific structure of the limiting portion 14 may be the same or different, so long as the limiting function can be satisfied, and redundant description will not be made here.
In one embodiment, the material of the compression bar roller 11 is polyethylene. Compared with the traditional polytetrafluoroethylene material, the weight of the compression bar roller 11 can be reduced, so that the stress of the solar cell silicon wafer 20 is further reduced. For example, as shown in fig. 2 and 3, the axial thickness b of the plunger roller 11 is 8mm, the inner diameter R2 is 20mm, the outer diameter R1 is 38mm, the plunger roller 11 made of polyethylene is about 2.5 to 3g, and the plunger roller 11 made of polytetrafluoroethylene is about 6g. Obviously, the compression bar roller 11 made of polyethylene is lighter in weight.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.
Claims (10)
1. A transfer mechanism for producing solar cells, comprising:
the roller assembly and at least two transmission shafts; the roller assembly comprises a compression bar roller and a support roller which are respectively sleeved on different transmission shafts, and a transmission channel for transmitting solar cell silicon wafers is formed between the compression bar roller and the support roller; the longitudinal section of the compression bar roller comprises an arc section, and the length of the arc section is smaller than half of the circumference.
2. The transmission mechanism of claim 1, wherein the length of the circular arc segment is greater than or equal to one-twelfth of the circumferential length.
3. The transmission mechanism of claim 2, wherein the length of the circular arc segment is greater than or equal to one eighth of the circumferential length and less than or equal to one sixth of the circumferential length.
4. The transport mechanism of claim 1, wherein the roller assembly comprises a plurality of the compression bar rollers and a plurality of the support rollers arranged at intervals, the number of compression bar rollers being less than the number of support rollers; and/or, the plurality of compression bar rollers and the plurality of support rollers are staggered.
5. The transport mechanism of claim 4, wherein the roller assembly comprises two of the plunger rollers; in the process of conveying the solar cell silicon wafer, two compression bar rollers are distributed on two opposite sides of the central line of the solar cell silicon wafer.
6. The transport mechanism of claim 5, wherein two of said plunger rollers are symmetrically disposed in a middle position on opposite sides of said solar cell silicon wafer.
7. The transmission mechanism of claim 1, wherein the plunger roller is in clearance fit with the drive shaft.
8. The transmission mechanism according to claim 7, further comprising limiting portions provided on opposite sides of the plunger roller in a longitudinal direction of the transmission shaft for limiting a movement displacement of the plunger roller.
9. The transport mechanism according to any one of claims 1 to 8, wherein the compression bar roller is made of polyethylene.
10. A production system for producing solar cells, characterized by comprising a transport mechanism according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931424.0U CN220253213U (en) | 2023-07-21 | 2023-07-21 | Transmission mechanism for producing solar cells and production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931424.0U CN220253213U (en) | 2023-07-21 | 2023-07-21 | Transmission mechanism for producing solar cells and production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220253213U true CN220253213U (en) | 2023-12-26 |
Family
ID=89267187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321931424.0U Active CN220253213U (en) | 2023-07-21 | 2023-07-21 | Transmission mechanism for producing solar cells and production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220253213U (en) |
-
2023
- 2023-07-21 CN CN202321931424.0U patent/CN220253213U/en active Active
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