Preparation device of solar cell electrode
By using an electrode loading chamber with high transmittance and low absorption rate and infrared laser heating technology, the problem of high cost of solar cell metallization is solved, and low-cost and efficient electrode preparation is achieved.
Patent Information
- Application Number
- CN202421974940.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The high cost of silver paste in existing solar cell metallization methods leads to high production costs.
An infrared laser is used to heat the electrode loading chamber of quartz, transparent ceramics, sapphire, high-temperature glass or silicon carbide with high transmittance and low absorption, forming metal gas and depositing it on the solar cell, avoiding material splashing and achieving uniform heating.
The cost of preparing solar cell electrodes is reduced, uniform heating and efficient metal electrode deposition are achieved, and production efficiency is improved.
Smart Images
Figure CN223322365U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of solar cell processing, in particular to a preparation device for a solar cell. Background Art
[0002] Currently, the main method for industrial solar cell metallization is screen printing paste. However, in actual production, the cost of silver paste remains high. To address the high cost of existing metallization solutions, the present invention proposes a low-cost, mass-producible solar cell electrode preparation device. Utility Model Content
[0003] The utility model provides a device for preparing solar cell electrodes, which can solve the problems existing in the prior art.
[0004] On the one hand, the utility model provides a device for preparing solar cell electrodes, including an electrode loading chamber with metal material built in; a heating device, which is a laser processing module arranged below the electrode loading chamber, irradiating laser toward the electrode loading chamber to heat the metal material in the electrode loading chamber to form metal gas; a solar cell carrier plate, which is arranged above the electrode loading chamber to carry solar cells; wherein the laser of the laser processing module is an infrared laser.
[0005] In some embodiments of a device for preparing a solar cell electrode, the electrode loading chamber has a laser transmittance of 90% or more.
[0006] In some embodiments of a device for preparing a solar cell electrode, the electrode loading chamber is made of quartz, transparent ceramic, sapphire, high-temperature glass, or silicon carbide.
[0007] In some embodiments, a solar cell electrode preparation device further includes a transmission device disposed above the electrode loading chamber for transmitting the solar cell carrier plate.
[0008] In some embodiments of a device for preparing a solar cell electrode, the distance between the electrode loading chamber and the solar cell carrier plate is 100 to 1200 mm.
[0009] In some embodiments of a device for preparing a solar cell electrode, the distance between the electrode loading chamber and the solar cell carrier plate is 100 to 500 mm.
[0010] In some embodiments of a device for preparing solar cell electrodes, laser processing modules are arranged in an array below an electrode loading chamber, wherein the processing spot size of the laser processing modules is 3 to 30 mm, and the intervals between the laser processing modules in the length and width directions of the electrode loading chamber are 0.5 to 1 times the processing spot size, respectively.
[0011] In some embodiments of the apparatus for preparing a solar cell electrode, the conveying device moves in a continuous conveying manner.
[0012] In some embodiments of a solar cell electrode preparation device, a plurality of electrode loading chambers are arranged at intervals along a traveling direction of a conveying device and / or a plurality of electrode loading chambers are arranged perpendicular to the traveling direction of the conveying device.
[0013] In some embodiments, a device for preparing a solar cell electrode further includes a deposition chamber, and the electrode loading chamber, the laser processing module, and the transmission device are all arranged in the deposition chamber.
[0014] In some embodiments of a device for preparing a solar cell electrode, the deposition chamber includes a vacuum pumping system.
[0015] In some embodiments, a device for preparing a solar cell electrode further includes an electromagnetic induction stirring device disposed in the electrode loading chamber.
[0016] The utility model achieves the following technical effects through the above technical solution.
[0017] The solar cell electrode preparation device of the present application has an electrode loading chamber opening facing upward, and the infrared laser has good penetration into the quartz electrode loading chamber. The laser processing module is arranged below the electrode loading chamber and emits laser toward it. The laser can directly pass through the electrode loading chamber to heat the metal material therein. The heating source avoids the evaporation side of the metal material, that is, the direction of the electrode loading chamber opening, to prevent the evaporating material from affecting the laser heating source. The metal material is heated more evenly from the bottom of the electrode loading chamber to the surface, preventing material splashing, thereby completing the preparation of the metal electrode of the solar cell arranged above the electrode loading chamber. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 This is a schematic cross-sectional view of a first direction of a device for preparing a solar cell electrode according to the present application;
[0020] Figure 2 Schematic diagram of the cross-sectional structure of a solar cell electrode manufacturing device in the second direction of the present application;
[0021] Figure 3This is a schematic structural diagram of a device for preparing a solar cell electrode according to one embodiment of the present application.
[0022] The figure includes: 1-electrode loading chamber, 2-laser processing module, 3-solar cell, 4-metal material, 5-solar cell carrier, 6-transmission device, 100-deposition chamber. DETAILED DESCRIPTION
[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] This application provides a device for preparing solar cell electrodes, see Figure 1 and Figure 2 , which are cross-sectional views of a first direction and a second direction of a solar cell electrode preparation device of the present application, respectively, wherein the first direction and the second direction are two perpendicular directions in a vertical plane. The solar cell electrode preparation device includes an electrode loading chamber 1, which is made of a material with high laser transmittance and low absorption rate. The metal material 4 for the electrode to be prepared is placed in the electrode loading chamber, which can be specifically a base metal material such as aluminum, nickel, and copper.
[0026] The aforementioned electrode loading chamber made of a material with high laser transmittance and low laser absorption refers to a material with a working laser transmittance greater than 90%, preferably greater than 95%. Examples include quartz, transparent ceramic, sapphire, high-temperature glass, or silicon carbide.
[0027] The heating device, an array of laser processing modules 2 positioned below the electrode loading chamber 1, radiates laser light toward the chamber, evaporating the metal material 4 therein into metallic gas. The lasers in the laser processing modules 2 are infrared lasers. The infrared lasers in the laser processing modules 2 have excellent penetration into the quartz-based electrode loading chamber, allowing them to directly penetrate the metal material within the chamber, reaching its vaporization temperature and causing it to evaporate into metallic gas.
[0028] The solar cell carrier plate 5 is arranged above the electrode loading chamber 1 , on which the solar cell 3 is placed. The evaporated metal gas is deposited on the solar cell 3 to form a metal electrode.
[0029] The solar cell electrode preparation device of the present application has an electrode loading chamber opening facing upward, and the infrared laser has good penetration into the quartz electrode loading chamber. The laser processing module is arranged below the electrode loading chamber and emits laser toward it. The laser can directly pass through the electrode loading chamber to heat the metal material therein. The heating source avoids the evaporation side of the metal material, that is, the direction of the electrode loading chamber opening, to prevent the evaporating material from affecting the laser heating source. The metal material is heated more evenly from the bottom of the electrode loading chamber to the surface, preventing material splashing, thereby completing the preparation of the metal electrode of the solar cell arranged above the electrode loading chamber.
[0030] The solar cell carrier plate 5 carries a single or multiple solar cells. Specifically, one solar cell is placed on it, or multiple solar cells are placed at intervals.
[0031] join Figure 3 , Figure 3 Schematic diagram of the structure of a solar cell electrode manufacturing device, the solar cell electrode manufacturing device of the present application further includes a transmission device 6 for transmitting the solar cell carrier 5. Specifically, the transmission device 6 can be a chain-type, belt-type, roller-type, or other transmission device in the prior art.
[0032] As a specific implementation method, continue to refer to Figure 3 The solar cell electrode fabrication apparatus of the present application includes a deposition chamber 100. The aforementioned electrode loading chamber 1 and laser processing module 2 are both disposed within the deposition chamber 100. A transfer device 6 passes through the deposition chamber 100 to transfer the solar cells. The deposition chamber 100 is conventional. In some embodiments, the deposition chamber further includes a vacuum system.
[0033] As a preferred embodiment, in the solar cell electrode preparation device of the present application, the electrode loading chamber 1 is long and narrow, and the laser processing modules 2 are evenly arranged in an array below the electrode loading chamber 1. This allows for uniform heating of the electrode loading chamber.
[0034] During the electrode preparation process, the electrode thickness may vary, for example, being thick in the center and thin at the edges. As a preferred embodiment, the electrode loading chamber 1 of the present application is 100 to 1200 mm away from the solar cell carrier. Preferably, the distance is 100 to 500 mm.
[0035] With such an arrangement, the electrode gas forms an outwardly expanding trumpet-shaped region with a higher concentration above the carrier box, covering the solar cells on the solar cell carrier board.
[0036] The laser processing modules 2 are arranged in an array below the electrode loading chamber 1. The laser light spots emitted by the laser processing modules are flat top lights, specifically circular or rectangular flat top lights. The spot size a1 is 3 to 30 mm, preferably a1 = 3 to 30 mm. When the spot is circular, a1 is the diameter of the spot; when the spot is rectangular, a1 is the side length of the spot. The laser processing modules 2 are arranged in an array below the electrode loading chamber 1. Specifically, their spacing P in the length and width directions of the electrode loading chamber is 0.5 to 1a1, with an optimal spacing of 10 to 20 mm.
[0037] In some embodiments, multiple electrode loading chambers 1 are spaced apart along the direction of travel of the conveyor 6, or multiple are arranged perpendicular to the direction of travel of the conveyor 6, or multiple are arranged in an array along the direction of travel of the conveyor 6. This allows for electrode preparation over a wider range.
[0038] Furthermore, as an implementable solution, the size of the solar cell carrier is 570mm×570mm, and the 3×3 arrangement carries 182mm×182mm solar cells. The transmission device 6 moves in a continuous conveying manner, and the electrode preparation is completed when the solar cell passes above the electrode loading chamber.
[0039] The present application is not limited thereto, and the number of electrode loading chambers may be appropriately increased according to differences in solar cell sizes or solar cell carrier panels.
[0040] As a preferred embodiment, when the electrode metal is a base metal electrode, in order to prevent the electrode from being oxidized, a solar electrode preparation device of the present application, the electrode preparation process is completed in a vacuum environment, wherein the vacuum degree is ≤3E-3Pa.
[0041] As a preferred embodiment, a preparation device for a solar cell electrode of the present application further includes an electromagnetic induction stirring device arranged in the electrode loading chamber. It can be understood that the laser heats the metal material to a melting temperature to form a liquid state; when the heating continues, the temperature of the metal material continues to rise until the material vaporization temperature, at which time the metal material begins to evaporate, and the electrode preparation is completed. As an implementable embodiment, an electromagnetic induction coil is arranged on the upper part of the electrode loading chamber, and the magnetic field of the alternating current induces eddy currents, causing turbulence in the metal liquid, thereby achieving the purpose of stirring. In this way, the uniformity of metal melting is improved.
[0042] The above description is only a preferred embodiment of the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, use the above-disclosed equipment and technical content to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A device for preparing a solar cell electrode, characterized in that: It includes an electrode loading chamber with built-in metal material; The heating device is a laser processing module disposed below the electrode loading chamber, which irradiates the laser toward the electrode loading chamber to heat the metal material in the electrode loading chamber to form metal gas; A solar cell carrier plate is arranged above the electrode loading chamber and is used to carry the solar cell; Among them, the laser of the laser processing module is an infrared laser.
2. The device for preparing a solar cell electrode according to claim 1, wherein: The electrode loading chamber has a laser transmittance of 90% or more.
3. The device for preparing a solar cell electrode according to claim 1 or 2, characterized in that: The electrode loading chamber is made of quartz, transparent ceramic, sapphire, high-temperature glass, or silicon carbide.
4. The device for preparing a solar cell electrode according to claim 1, wherein: The invention also comprises a transmission device arranged above the electrode loading chamber for transmitting the solar cell loading panel.
5. The device for preparing a solar cell electrode according to claim 1 or 2, characterized in that: The distance between the electrode loading chamber and the solar cell loading plate is 100 to 1200 mm.
6. The device for preparing a solar cell electrode according to claim 5, characterized in that: The distance between the electrode loading chamber and the solar cell loading plate is 100 to 500 mm.
7. The device for preparing a solar cell electrode according to claim 5, characterized in that: The laser processing modules are arranged in an array below the electrode loading chamber, wherein the processing spot size of the laser processing modules is 3 to 30 mm, and the intervals between the laser processing modules in the length direction and width direction of the electrode loading chamber are 0.5 to 1 times of the processing spot size respectively.
8. The device for preparing a solar cell electrode according to claim 4, characterized in that: The conveyor moves in a continuous conveying manner.
9. The device for preparing a solar cell electrode according to claim 8, characterized in that: A plurality of electrode loading chambers are arranged at intervals along the traveling direction of the conveying device and / or a plurality of electrode loading chambers are arranged perpendicular to the traveling direction of the conveying device.
10. The device for preparing a solar cell electrode according to claim 4, characterized in that: It also includes a deposition chamber, in which the electrode loading chamber, the laser processing module, and the transmission device are all arranged.
11. The device for preparing a solar cell electrode according to claim 10, characterized in that: The deposition chamber includes a vacuum pumping system.
12. The device for preparing a solar cell electrode according to claim 1, wherein: The invention also comprises an electromagnetic induction stirring device arranged in the electrode loading chamber.