Packaging method, system and related devices for heterojunction solar cells

Abstract

The application discloses a packaging method and system of a heterojunction solar cell and related devices, and the method comprises the following steps: pre-treating the surface of a cell to be packaged; coating a film on the cell after surface treatment, and packaging the cell after coating into a packaging film; monitoring and controlling the temperature and pressure in the packaging film by using a monitoring device; and establishing an evaluation system to test and evaluate the electrical properties and quality of the cell packaged in the film. In the early stage of cell packaging, the surface of the cell is pre-treated, so that the pollution on the surface of the cell can be effectively removed, the cleanliness of the surface of the cell and the activity of the cell are improved, and the problem of instability of the cell in use is avoided. Furthermore, by establishing the evaluation system, the performance and quality of the cell can be effectively evaluated according to corresponding evaluation items after the cell is packaged, so that the technical defect that the use effect of the packaged cell cannot reach the expected effect in use is avoided.

Description

Technical Field

[0001] This invention belongs to the field of solar cell encapsulation technology, specifically relating to a method, system, and related apparatus for encapsulating heterojunction solar cells. Background Technology

[0002] With the continuous development of photovoltaic technology, heterojunction solar cells have gradually become a new favorite in the photovoltaic market due to their high conversion efficiency, low temperature coefficient, and good stability. However, the encapsulation of heterojunction solar cells still has significant drawbacks. During the encapsulation process, due to the large number of cells, incomplete cleaning of the cell surface can occur, leading to instability in the encapsulated cells during use. Secondly, traditional encapsulation techniques do not conduct relevant tests on the encapsulated cells, resulting in the cells failing to meet expected performance. Summary of the Invention

[0003] This invention provides a method, system, and related apparatus for encapsulating heterojunction solar cells. Firstly, it addresses the problem of incomplete cleaning of the cell surface during existing technologies, which leads to instability in the encapsulated cells during use. Secondly, it addresses the technical defect that traditional encapsulation techniques fail to perform relevant tests on the encapsulated cells, resulting in the cells not achieving the expected performance.

[0004] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, a method for encapsulating a heterojunction solar cell is provided, comprising: Pre-treatment of the surface of the battery to be packaged; A coating is applied to the surface-treated battery, and the coated battery is then encapsulated in an encapsulating film. The temperature and pressure inside the encapsulation film are monitored and controlled using a monitoring device; Establish an evaluation system to test and evaluate the electrical performance and quality of batteries encapsulated in film.

[0005] Furthermore, the pretreatment of the surface of the battery to be packaged specifically includes: Chain cleaning or chain gettering technology is used to clean and texturize the battery to remove contaminants from the battery surface and form a phosphosilicate glass layer on the battery surface.

[0006] Further, a coating is applied to the surface-treated battery, and the coated battery is then encapsulated in an encapsulating film, specifically including: Using PEVCD technology, amorphous silicon thin films and TCO transparent conductive oxide thin films are deposited on the surface of the battery to form a conductive layer, thereby improving the photoelectric conversion efficiency and conductivity of the battery. Polyvinyl butyral material is selected to make the encapsulation film, which is used to encapsulate the coated battery and ensure that the encapsulation film is tightly bonded to the battery to avoid damage to the battery.

[0007] Furthermore, monitoring devices are used to monitor and control the temperature and pressure inside the encapsulating film, specifically including: The monitoring device includes a temperature monitoring device and a pressure monitoring device. During the battery encapsulation process, the temperature and pressure inside the encapsulation film are controlled using the temperature monitoring device and the pressure monitoring device. The temperature inside the encapsulating film is controlled at 150~180℃, and the pressure inside the encapsulating film is controlled at 0.5~1.0 MPa to ensure good contact and sealing performance between the encapsulating film and the battery.

[0008] Furthermore, the temperature monitoring device and the pressure monitoring device are electrically connected to an external control device. When the battery is encapsulated with the encapsulating film, the monitoring ends of the temperature monitoring device and the pressure monitoring device are located inside the encapsulating film, without affecting the normal encapsulation of the battery. When the encapsulation process is complete, the monitoring terminals of the temperature and pressure monitoring devices are removed from inside the encapsulation film.

[0009] Furthermore, the establishment of an evaluation system to test and evaluate the electrical performance and quality of batteries encapsulated in the film specifically includes: Establish a battery electrical performance and quality assessment system to test the electrical performance and assess the quality of batteries encapsulated inside the encapsulation film.

[0010] Secondly, a heterojunction solar cell is provided, including a cell body, which is encapsulated using the method described above.

[0011] Thirdly, a packaging system for a heterojunction solar cell is provided, comprising: The processing module is used for pre-treating the surface of the battery to be packaged; A coating module is used to coat the surface-treated battery. The monitoring module is used to monitor and control the temperature and pressure inside the encapsulation film; The evaluation system establishment module is used to test and evaluate the electrical performance and quality of batteries encapsulated in film. Fourthly, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable in the processor, wherein the processor executes the computer program to implement the steps of the encapsulation method for a heterojunction solar cell as described above.

[0012] Fifthly, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program, which, when executed by a processor, implements the encapsulation method for a heterojunction solar cell as described above.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the early stage of battery packaging, pretreatment of the battery surface can effectively remove contaminants, improve the cleanliness of the battery surface and the battery activity, and avoid instability problems during battery use. Secondly, by establishing an evaluation system, after the battery is packaged, the performance and quality of the battery are effectively evaluated according to the corresponding evaluation items, eliminating the technical defects that prevent the packaged battery from achieving the expected performance during use.

[0014] 2. Chain cleaning or chain gettering techniques are used to clean and texturize the batteries, removing contaminants from the battery surface, reducing light absorption loss and charge recombination centers, and improving the battery's photoelectric conversion efficiency. Simultaneously, the formation of the phosphosilicate glass layer further absorbs metallic impurities from within the silicon wafer, reducing their adverse effects on battery performance and improving conversion efficiency and stability. A clean battery surface facilitates subsequent coating processes, and the thin film deposited on a clean surface is more uniform and dense, further enhancing battery performance and reliability.

[0015] 3. The deposition of amorphous silicon thin films and TCO thin films significantly improves the photoelectric conversion efficiency of the battery. The heterojunction effect of the amorphous silicon thin film promotes the effective separation and transport of photogenerated carriers, while the TCO thin film reduces the series resistance of the battery and improves the current collection efficiency. Secondly, as a transparent conductive layer, the TCO thin film not only maintains good light transmittance but also significantly improves the battery's conductivity, which helps reduce the battery's internal resistance, increase the fill factor, and improve the maximum output power. Finally, the encapsulating film forms an effective protective barrier for the battery, preventing corrosion from harmful substances such as moisture, oxygen, and dust in the external environment, thus helping to extend the battery's lifespan and maintain stable long-term performance output.

[0016] 4. By precisely controlling the temperature and pressure inside the encapsulation film, good contact and sealing performance between the film and the battery can be ensured. This helps reduce quality problems such as bubbles and delamination during the encapsulation process, improving the reliability and durability of the encapsulation. Suitable temperature and pressure conditions help prevent damage to the battery from excessive temperature or pressure, helping to maintain the stability of the battery's internal structure and performance, and extending its lifespan. Furthermore, by monitoring and adjusting encapsulation parameters in real time, it can be ensured that each battery undergoes the same processing procedure, reducing errors and uncertainties caused by human operation.

[0017] 5. By monitoring temperature and pressure changes within the encapsulation film in real time, the external control device can adjust encapsulation parameters promptly, ensuring the encapsulation process operates under optimal conditions and improving the stability and consistency of encapsulation quality. The monitoring device provides additional safety assurance for the encapsulation process; if any abnormalities are detected, such as excessively high temperature or insufficient pressure, the control device can immediately intervene to prevent encapsulation failure or battery damage.

[0018] 6. By establishing an evaluation system, batteries encapsulated in the film can be comprehensively and objectively tested and evaluated, potential quality problems can be identified and resolved in a timely manner, the overall quality level of the product can be improved, market competitiveness can be enhanced, and it can be ensured that the battery will not cause safety accidents due to short circuits, overcharging or other reasons during use, thus protecting the personal and property safety of users. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Flowchart of a low-temperature welding method for heterojunction module batteries provided by the present invention; Figure 2 A schematic diagram of the low-temperature welding system for heterojunction module batteries provided by the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0027] With the continuous development of photovoltaic technology, heterojunction solar cells have gradually become a new favorite in the photovoltaic market due to their high conversion efficiency, low temperature coefficient, and good stability. However, the encapsulation of heterojunction solar cells still has significant drawbacks. During the encapsulation process, due to the large number of cells, incomplete cleaning of the cell surface can occur, leading to instability in the encapsulated cells during use. Secondly, traditional encapsulation techniques do not conduct relevant tests on the encapsulated cells, resulting in the cells failing to meet expected performance.

[0028] To address the aforementioned technical deficiencies, the inventors have provided a method, system, and related apparatus for encapsulating heterojunction solar cells.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings: Firstly, this embodiment provides a method for encapsulating a heterojunction solar cell, such as... Figure 1 As shown, the method includes: S101. Pre-treat the surface of the battery to be packaged; exemplarily, construct a conveying mechanism and arrange chain cleaning or chain getter equipment on both sides of the conveying mechanism. Place the battery to be packaged on the conveying mechanism, and use the conveying function of the conveying mechanism to transport a batch of batteries to be cleaned towards the chain cleaning or chain getter equipment. Use the chain cleaning or chain getter equipment to clean and texturize the battery, remove contaminants from the battery surface, and form a phosphosilicate glass layer on the battery surface. During the pre-treatment of the surface of the battery to be packaged, the use of chain cleaning or chain getter technology to clean and texturize the battery effectively removes contaminants from the battery surface, reduces light absorption loss and charge recombination centers, and improves the photoelectric conversion efficiency of the battery itself. At the same time, the formation of the phosphosilicate glass layer further absorbs metal impurities inside the silicon wafer, reducing the adverse effects of these impurities on battery performance, improving the conversion efficiency and stability of the battery. A clean battery surface is beneficial for subsequent coating processes, and the film deposited on a clean surface is more uniform and dense, which is beneficial for improving the performance and reliability of the battery.

[0030] S102. A coating is applied to the surface-treated battery, and the coated battery is then encapsulated in an encapsulating film. Exemplarily, using PEVCD technology, an amorphous silicon thin film and a TCO transparent conductive oxide thin film are deposited on the battery surface to form a conductive layer, improving the battery's photoelectric conversion efficiency and conductivity. The heterojunction effect of the amorphous silicon thin film promotes the effective separation and transport of photogenerated carriers, while the TCO thin film reduces the battery's series resistance and improves current collection efficiency. Secondly, the TCO thin film, as a transparent conductive layer, not only maintains good light transmittance but also significantly improves the battery's conductivity, which helps reduce the battery's internal resistance, increase the fill factor, and improve the maximum output power. Finally, a polyvinyl butyral material is used to make the encapsulating film to encapsulate the coated battery, ensuring a tight bond between the encapsulating film and the battery. This prevents damage to the battery and protects it from harmful substances such as moisture, oxygen, and dust in the external environment, helping to extend the battery's lifespan and maintain stable long-term performance output.

[0031] S103. A monitoring device is used to monitor and control the temperature and pressure inside the encapsulation film. Exemplarily, the monitoring device includes a temperature monitoring device and a pressure monitoring device. During the battery encapsulation process, the temperature and pressure inside the encapsulation film are controlled using these devices. Precise control of the temperature and pressure inside the encapsulation film ensures good contact and sealing performance between the film and the battery, helping to reduce quality problems such as bubbles and delamination during the encapsulation process, and improving the reliability and durability of the encapsulation. Specifically, the temperature inside the encapsulation film is controlled at 150~180℃, and the pressure inside the encapsulation film is controlled at 0.5~1.0 MPa to ensure good contact and sealing performance between the encapsulation film and the battery. Suitable temperature and pressure conditions help avoid damage to the battery caused by excessive temperature or pressure, help maintain the stability of the battery's internal structure and performance, and extend its service life. Furthermore, by monitoring and adjusting the encapsulation parameters in real time, it can be ensured that each battery undergoes the same processing procedure, reducing errors and uncertainties caused by human operation.

[0032] S104. Establish an evaluation system to test and evaluate the electrical performance and quality of batteries encapsulated in the film. For example, by establishing an evaluation system, batteries encapsulated in the film can be comprehensively and objectively tested and evaluated, potential quality problems can be identified and resolved in a timely manner, the overall quality level of the product can be improved, market competitiveness can be enhanced, and it can be ensured that the battery will not cause safety accidents due to short circuits, overcharging, etc. during use, thus protecting the personal and property safety of users.

[0033] When batteries are packaged using the above methods, the surface of the battery is pretreated in the early stages of packaging, which effectively removes contaminants from the battery surface, improves the cleanliness of the battery surface and the battery activity, and avoids instability problems during battery use. Secondly, by establishing an evaluation system, the performance and quality of the battery are effectively evaluated according to the corresponding evaluation items after the battery is packaged, eliminating the technical defects that prevent the packaged battery from achieving the expected performance during use.

[0034] Secondly, a heterojunction solar cell is provided, including a cell body, which is encapsulated using the method described above.

[0035] Thirdly, a packaging system for heterojunction solar cells is provided, such as... Figure 2 As shown, it includes: The processing module is used for pre-treating the surface of the battery to be packaged; A coating module is used to coat the surface-treated battery. The monitoring module is used to monitor and control the temperature and pressure inside the encapsulation film; The evaluation system establishment module is used to test and evaluate the electrical performance and quality of batteries encapsulated in film. Fourthly, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable in the processor, wherein the processor executes the computer program to implement the steps of the encapsulation method for a heterojunction solar cell as described above.

[0036] Fifthly, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program, which, when executed by a processor, implements the encapsulation method for a heterojunction solar cell as described above.

[0037] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

[0038] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0039] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0040] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes.

[0041] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for encapsulating a heterojunction solar cell, characterized in that, include: Pre-treatment of the surface of the battery to be packaged; A coating is applied to the surface-treated battery, and the coated battery is then encapsulated in an encapsulating film. The temperature and pressure inside the encapsulation film are monitored and controlled using a monitoring device; Establish an evaluation system to test and evaluate the electrical performance and quality of batteries encapsulated in film.

2. The method according to claim 1, characterized in that, The pretreatment of the surface of the battery to be packaged specifically includes: Chain cleaning or chain gettering technology is used to clean and texturize the battery to remove contaminants from the battery surface and form a phosphosilicate glass layer on the battery surface.

3. The method according to claim 1, characterized in that, A coating is applied to the surface-treated battery, and the coated battery is then encapsulated in an encapsulating film. Specifically, this includes: Using PEVCD technology, amorphous silicon thin films and TCO transparent conductive oxide thin films are deposited on the surface of the battery to form a conductive layer, thereby improving the photoelectric conversion efficiency and conductivity of the battery. Polyvinyl butyral material is selected to make the encapsulation film, which is used to encapsulate the coated battery and ensure that the encapsulation film is tightly bonded to the battery to avoid damage to the battery.

4. The method according to claim 1, characterized in that, The temperature and pressure inside the encapsulation film are monitored and controlled using monitoring devices, specifically including: The monitoring device includes a temperature monitoring device and a pressure monitoring device. During the battery encapsulation process, the temperature and pressure inside the encapsulation film are controlled using the temperature monitoring device and the pressure monitoring device. The temperature inside the encapsulating film is controlled at 150~180℃, and the pressure inside the encapsulating film is controlled at 0.5~1.0MPa to ensure good contact and sealing performance between the encapsulating film and the battery.

5. The method according to claim 4, characterized in that, The temperature monitoring device and pressure monitoring device are electrically connected to the external control device. When the battery is sealed with the encapsulating film, the monitoring ends of the temperature monitoring device and pressure monitoring device are located inside the encapsulating film and do not affect the normal sealing of the battery. When the encapsulation process is complete, the monitoring terminals of the temperature and pressure monitoring devices are removed from inside the encapsulation film.

6. The method according to claim 1, characterized in that, The establishment of an evaluation system to test and evaluate the electrical performance and quality of batteries encapsulated in a film specifically includes: Establish a battery electrical performance and quality assessment system to test the electrical performance and assess the quality of batteries encapsulated inside the encapsulation film.

7. A heterojunction solar cell, comprising a cell body, wherein the cell body is encapsulated using the method described in any one of claims 1-6.

8. A packaging system for a heterojunction solar cell, characterized in that, include: The processing module is used for pre-treating the surface of the battery to be packaged; A coating module is used to coat the surface-treated battery. The monitoring module is used to monitor and control the temperature and pressure inside the encapsulation film; The evaluation system establishment module is used to test and evaluate the electrical performance and quality of batteries encapsulated in a film.

9. An electronic device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable in the processor, wherein the processor executes the computer program to implement the steps of the encapsulation method for the heterojunction solar cell according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the encapsulation method for a heterojunction solar cell according to any one of claims 1 to 6.

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