High efficiency hjt solar cell photovoltaic module and method of making same

Abstract

The present application belongs to the technical field of photovoltaic power generation, and relates to a high-efficiency HJT cell photovoltaic module and a preparation method thereof. In the method, high-efficiency HJT cells are made into a cell string; tempered glass is laid on one side of the cell string, and a back plate is laid on the other side of the cell string; high-cutting adhesive film is laid between the cell string and the tempered glass, and high-cutting adhesive film is laid between the cell string and the back plate; at a set temperature, the high-cutting adhesive film is melted to tightly bond the cell string, the tempered glass and the back plate to form a sealed module; the initial module is subjected to nondestructive testing by using the electroluminescence principle, and the sealed module with hidden defects is identified and removed to improve the stability of the prepared photovoltaic module. An aluminum frame is installed for the sealed module and connected to a junction box to obtain a high-efficiency HJT cell photovoltaic module. The method optimizes the preparation method of the high-efficiency HJT cell photovoltaic module, and improves the stability of the high-efficiency HJT cell photovoltaic module.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic power generation technology, and relates to a high-efficiency HJT cell photovoltaic module and its preparation method. Background Technology

[0002] A photovoltaic (PV) module is the smallest effective unit of power generation, mainly composed of nine core components. A single PV cell has a limited power output; therefore, they must be connected in series and packaged into a module to be used as a power source. Thus, a PV module is the smallest indivisible solar cell device capable of providing direct current output independently.

[0003] Currently, photovoltaic (PV) modules mainly consist of nine core components: solar cells, interconnect strips, busbars, tempered glass, EVA, backsheet, aluminum alloy, silicone, and junction boxes. Their manufacturing primarily involves two steps: cell interconnection and lamination. PV module products have a lifespan of at least 25 years, requiring environmental tolerance and certain mechanical properties. Therefore, after cell interconnection, they are generally encapsulated together in a bottom-up order: tempered glass, EVA, solar cells, and backsheet, using a lamination process. The backsheet and tempered glass encapsulate the solar cells and EVA internally, protected by an aluminum frame and silicone sealant. While EVA film has good adhesion, it has poor water resistance and easily decomposes in high-temperature and high-humidity environments, producing acetic acid that corrodes the cell metal electrodes, TCO film, and solder ribbons, adversely affecting module performance and stability. Furthermore, under ultraviolet radiation, EVA film is prone to aging, yellowing in color and affecting its light transmittance and power generation efficiency. In addition, due to the complex manufacturing process of photovoltaic modules, any oversight in any process detail can directly affect the performance and stability of the photovoltaic modules.

[0004] In summary, existing methods for manufacturing photovoltaic modules are cumbersome and the resulting photovoltaic modules lack stability. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency HJT cell photovoltaic module and its preparation method, so as to solve the technical problems of cumbersome process and insufficient stability of existing photovoltaic module preparation methods. This invention improves the stability of high-efficiency HJT cell photovoltaic modules by optimizing the preparation method.

[0006] To achieve the above objectives, the present invention employs the following technical solution: This invention discloses a method for preparing a high-efficiency HJT solar photovoltaic module, comprising the following steps: High-efficiency HJT batteries are made into battery strings; Tempered glass is laid on one side of the battery string, and a backplate is laid on the other side of the battery string. A high-cutoff film is laid between the battery string and the tempered glass, and a high-cutoff film is laid between the battery string and the backplate. At a set temperature, the high-cutoff adhesive film is melted and tightly bonded to the battery string, tempered glass, and backplate to form a sealed assembly; The initial components were subjected to non-destructive testing using the principle of electroluminescence. An aluminum frame is installed on the sealed assembly and a junction box is connected to obtain a high-efficiency HJT cell photovoltaic module.

[0007] Furthermore, the specific steps for fabricating high-efficiency HJT batteries into battery strings are as follows: The busbar is welded to the main grid line on the front of the battery, and infrared lamps are used for multi-point welding during the welding process. The positive and negative terminals of adjacent battery cells are connected together using a soldering iron and solder wire to form a battery string.

[0008] Furthermore, the high-efficiency HJT batteries are fabricated into battery strings, and a micro-pitch process is used in the fabrication process.

[0009] Furthermore, the tempered glass is tempered coated glass, and the light transmittance of the tempered coated glass is greater than or equal to 93.5%.

[0010] Furthermore, the thickness of the tempered coated glass is 2.0mm to 1.6mm.

[0011] Furthermore, the step of melting the high-cutoff adhesive film at a set temperature and tightly bonding the battery string, tempered glass, and backplate to form a sealed assembly is as follows: Place the laid components into the laminator for preheating; The air inside the component is extracted by vacuuming; Heating melts the high-cutoff adhesive film, and pressure is applied to tightly bond the battery string, tempered glass, and backplate to form a sealed assembly. After cooling, remove the sealing assembly and trim the edges.

[0012] Furthermore, the heating melts the high-cutoff adhesive film, and the pressure is applied to tightly bond the battery string, tempered glass, and backplate to form a sealed assembly. The heating temperature is 130~150℃, and the pressure applied is 0.8~1.0MPa.

[0013] Furthermore, the process involves installing an aluminum frame for the sealing assembly and connecting it to a junction box. After installing the aluminum frame and connecting the junction box, the high-efficiency HJT photovoltaic module is cleaned.

[0014] Furthermore, the high-efficiency HJT photovoltaic modules are cleaned, and after cleaning, IV testing and finished product inspection are performed on the high-efficiency HJT photovoltaic modules.

[0015] Based on the above method, the present invention discloses a high-efficiency HJT battery photovoltaic module, including a battery string. One side of the battery string is provided with tempered glass and an aluminum frame. The tempered glass is located between the battery string and the aluminum frame. A back sheet is provided on the other side of the battery string. A high-cutoff film is provided between the battery string and the tempered glass, and a high-cutoff film is provided between the battery string and the back sheet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention involves fabricating high-efficiency HJT solar cells into battery strings. Tempered glass is laid on one side of the battery string, and a backsheet is laid on the other side for support and protection. High-cutoff films are applied between the battery string and the tempered glass, and between the battery string and the backsheet. The tempered glass possesses high strength, high light transmittance, and good weather resistance, protecting the battery string from environmental damage. The high-cutoff films effectively prevent electrical connections between the battery string and the external environment, while ensuring tight adhesion between the battery string, tempered glass, and backsheet. Furthermore, the high-cutoff films block low-wavelength light, solving the problem of module degradation caused by ultraviolet light. At a set temperature, the high-cutoff films melt and tightly bond the battery string, tempered glass, and backsheet to form a sealed module, effectively preventing moisture, dust, and other harmful substances from entering the battery string and ensuring long-term stable operation of the photovoltaic module. Electroluminescence principles are used to perform non-destructive testing on the initial module, identifying and eliminating sealed modules with hidden defects to improve the stability of the prepared photovoltaic module. An aluminum frame is installed on the sealed assembly and a junction box is connected to obtain a high-efficiency HJT solar photovoltaic module. The aluminum frame provides additional structural support and protection for the photovoltaic module. The junction box is the interface between the photovoltaic module and the external circuit, ensuring that the electrical energy generated by the photovoltaic module is smoothly transmitted to the grid or energy storage equipment. This invention improves the stability of high-efficiency HJT solar photovoltaic modules by optimizing the fabrication method.

[0017] 2. This invention includes a battery string. One side of the battery string is provided with tempered glass and an aluminum frame. The tempered glass is located between the battery string and the aluminum frame, serving a protective and supporting function. The tempered glass also has good light transmittance, ensuring that sunlight fully illuminates the battery string, thereby improving photoelectric conversion efficiency. A backplate is provided on the other side of the battery string. A high-cutoff film is provided between the battery string and the tempered glass, and between the battery string and the backplate. In HJT solar cells, the high-cutoff film is used to form the pn junction between the positive and negative electrodes of the cell, controlling the movement direction of electrons and holes, reducing sunlight reflection, increasing light absorption, and helping to reduce the recombination probability of electron-hole pairs, thereby improving the efficiency of the solar cell. The high-cutoff film also protects the battery structure and enhances battery stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the high-efficiency HJT cell photovoltaic module of the present invention; Figure 2 This is an EL diagram of the irregularly shaped solder strip micro-pitch component according to an embodiment of the present invention; Figure 3 This is a flowchart of the method of the present invention.

[0019] The components include: 1. Battery string; 2. Tempered glass; 3. High cut-off film; 4. Backplate; 5. Aluminum frame. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 3 This invention discloses a method for preparing a high-efficiency HJT solar photovoltaic module, comprising the following steps: S1. The high-efficiency HJT battery is fabricated into battery string 1, as follows: The busbar is welded to the main grid line on the front of the battery, and infrared lamps are used for multi-point welding during the welding process. The positive and negative terminals of adjacent battery cells are connected by a soldering iron and solder wire to form a battery string 1.

[0023] Preferably, a micro-pitch process is used in the manufacturing process.

[0024] Module efficiency is mainly determined by two factors: power and module area. Smaller cell spacing can effectively reduce module area, thereby achieving higher module efficiency.

[0025] To avoid microcracks and debris affecting module power and to facilitate the industrialization of the technology, the gap between solar cells should be controlled within 1mm. (See [link / reference]). Figure 2 EL images showed that the solar cells had no microcracks or fragments. Through repeated experiments, this technical approach has demonstrated high stability and is easy to implement in mass production lines, aiming to improve module efficiency and reduce the amount of encapsulation materials used.

[0026] S2. Tempered glass 2 is laid on one side of battery string 1, back plate 4 is laid on the other side of battery string 1, high cut-off film 3 is laid between battery string 1 and tempered glass 2, and high cut-off film 3 is laid between battery string 1 and back plate 4. Currently, the main encapsulation materials include transparent EVA film, white EVA film, polyolefin (POE) film, co-extruded polyolefin composite film EPE (EVA-POE-EVA) film, PDMS / Silicon film, PVB film, and TPU film.

[0027] After UV irradiation testing, the high-cutoff film modules maintained relatively stable power after a cumulative UV irradiation of 15 kWh / m², and when the cumulative UV irradiation reached 60 kWh / m², the power decay was only 1 / 5 of that of the high-transmittance film modules, meeting the module stability standards. The high-cutoff film blocks low-wavelength light (below 400 nm), solving the module degradation problem caused by ultraviolet light. Through improvements to the production line encapsulation process, the high-cutoff film was successfully and comprehensively introduced into the production line, completely replacing the previous high-transmittance film.

[0028] Preferably, the tempered glass 2 is tempered coated glass, and the light transmittance of the tempered coated glass is greater than or equal to 93.5%.

[0029] Preferably, the spectral response range of the crystalline silicon solar cell is 300-1200nm. Anti-reflective coated glass can effectively reduce the loss of sunlight reflection in this wavelength range and improve the glass transmittance. Considering the balance between transmittance and cost, the transmittance requirement is between 93.5% and 94%.

[0030] Preferably, the thickness of the tempered coated glass is 2.0mm to 1.6mm.

[0031] Photovoltaic glass is an important auxiliary material for photovoltaic modules, mainly serving to provide high light transmittance and weather protection. Photovoltaic glass contains iron, and higher light transmittance is generally achieved by reducing the iron content. At the same time, after tempering, photovoltaic glass has higher strength, ensuring that the solar cells can withstand greater temperature changes and wind pressure, and also protecting them from corrosion by rainwater and harmful gases in the environment.

[0032] S3. At a set temperature, the high-cutoff adhesive film 3 is melted and tightly bonded to the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly, as detailed below: Place the laid components into the laminator for preheating; The air inside the component is extracted by vacuuming; Heating melts the high-cutoff adhesive film 3, and pressure is applied to tightly bond the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly; After cooling, remove the sealing assembly and trim the edges.

[0033] Preferably, the heating temperature is 130~150℃ and the pressurization pressure is 0.8~1.0MPa.

[0034] S4. Using the principle of electroluminescence, non-destructive testing is performed on the obtained initial components to identify and remove sealed components with hidden defects, thereby improving the stability of the prepared photovoltaic modules.

[0035] S5. Install the aluminum frame 5 on the sealing component and connect it to the junction box to obtain the high-efficiency HJT photovoltaic module. After installing the aluminum frame 5 and connecting the junction box, clean, perform IV testing and finished product inspection on the high-efficiency HJT photovoltaic module.

[0036] See Figure 3 In another feasible embodiment of the present invention, the following modifications are made as appropriate. The steps include: The high-efficiency HJT battery is made into a battery string 1; Tempered glass 2 is laid on one side of the battery string 1, and a backsheet 4 is laid on the other side of the battery string 1 to support and protect the battery string. A high-cutoff film 3 is laid between the battery string 1 and the tempered glass 2, and between the battery string 1 and the backsheet 4. The tempered glass has high strength, high light transmittance, and good weather resistance, which can protect the battery string from damage from the external environment. The high-cutoff film has excellent adhesion and electrical insulation properties, which can effectively prevent electrical connection between the battery string and the external environment, while ensuring tight adhesion between the battery string and the tempered glass and the backsheet. In addition, the high-cutoff film can block low-wavelength (below 400nm) light, solving the problem of module degradation caused by ultraviolet light.

[0037] At a set temperature, the high-cutoff film 3 is melted and tightly bonded to the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly, which can effectively prevent harmful substances such as moisture and dust from entering the battery string and causing battery performance degradation or damage, thus ensuring the long-term stable operation of the photovoltaic module. The principle of electroluminescence is used to perform non-destructive testing on the initial components, identify and eliminate sealed components with hidden defects, thereby improving the stability of the prepared photovoltaic modules.

[0038] An aluminum frame 5 is installed on the sealed assembly and connected to a junction box to obtain a high-efficiency HJT photovoltaic module. The aluminum frame is lightweight, high-strength, and has good corrosion resistance, providing additional structural support and protection for the photovoltaic module. The junction box is the interface between the photovoltaic module and the external circuit, ensuring that the electrical energy generated by the photovoltaic module is smoothly transmitted to the grid or energy storage equipment.

[0039] The method of this invention improves the stability of high-efficiency HJT photovoltaic modules by optimizing the preparation method of high-efficiency HJT photovoltaic modules.

[0040] Example 1: This embodiment discloses a method for preparing a high-efficiency HJT solar cell photovoltaic module. See [link to documentation]. Figure 3 This includes the following steps: S1. The high-efficiency HJT battery is fabricated into battery string 1, as follows: The busbar is welded to the main grid line on the front of the battery, and infrared lamps are used for multi-point welding during the welding process. The positive and negative terminals of adjacent battery cells are connected by a soldering iron and solder wire to form a battery string 1.

[0041] Preferably, a micro-pitch process is used in the manufacturing process.

[0042] S2. Tempered glass 2 is laid on one side of battery string 1, back plate 4 is laid on the other side of battery string 1, high cut-off film 3 is laid between battery string 1 and tempered glass 2, and high cut-off film 3 is laid between battery string 1 and back plate 4. Preferably, the tempered glass 2 is tempered coated glass, and the light transmittance of the tempered coated glass is greater than or equal to 93.5%.

[0043] Preferably, the thickness of the tempered coated glass is 2.0 mm.

[0044] S3. At a set temperature, the high-cutoff adhesive film 3 is melted and tightly bonded to the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly, as detailed below: Place the laid components into the laminator for preheating; The air inside the component is extracted by vacuuming; Heating melts the high-cutoff adhesive film 3, and pressure is applied to tightly bond the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly; After cooling, remove the sealing assembly and trim the edges.

[0045] Preferably, the heating temperature is 130°C and the pressurization pressure is 0.8 MPa.

[0046] S4. Using the principle of electroluminescence, non-destructive testing is performed on the obtained initial components to identify and remove sealed components with hidden defects, thereby improving the stability of the prepared photovoltaic modules.

[0047] S5. Install the aluminum frame 5 on the sealing component and connect it to the junction box to obtain the high-efficiency HJT photovoltaic module. After installing the aluminum frame 5 and connecting the junction box, clean, perform IV testing and finished product inspection on the high-efficiency HJT photovoltaic module.

[0048] Example 2: This embodiment discloses a method for preparing a high-efficiency HJT solar cell photovoltaic module. See [link to documentation]. Figure 3 This includes the following steps: S1. The high-efficiency HJT battery is fabricated into battery string 1, as follows: The busbar is welded to the main grid line on the front of the battery, and infrared lamps are used for multi-point welding during the welding process. The positive and negative terminals of adjacent battery cells are connected by a soldering iron and solder wire to form a battery string 1.

[0049] Preferably, a micro-pitch process is used in the manufacturing process.

[0050] S2. Tempered glass 2 is laid on one side of battery string 1, back plate 4 is laid on the other side of battery string 1, high cut-off film 3 is laid between battery string 1 and tempered glass 2, and high cut-off film 3 is laid between battery string 1 and back plate 4. Preferably, the tempered glass 2 is tempered coated glass, and the light transmittance of the tempered coated glass is greater than or equal to 93.5%.

[0051] Preferably, the thickness of the tempered coated glass is 1.8 mm.

[0052] S3. At a set temperature, the high-cutoff adhesive film 3 is melted and tightly bonded to the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly, as detailed below: Place the laid components into the laminator for preheating; The air inside the component is extracted by vacuuming; Heating melts the high-cutoff adhesive film 3, and pressure is applied to tightly bond the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly; After cooling, remove the sealing assembly and trim the edges.

[0053] Preferably, the heating temperature is 140°C and the pressurization pressure is 0.9 MPa.

[0054] S4. Using the principle of electroluminescence, non-destructive testing is performed on the obtained initial components to identify and remove sealed components with hidden defects, thereby improving the stability of the prepared photovoltaic modules.

[0055] S5. Install the aluminum frame 5 on the sealing component and connect it to the junction box to obtain the high-efficiency HJT photovoltaic module. After installing the aluminum frame 5 and connecting the junction box, clean, perform IV testing and finished product inspection on the high-efficiency HJT photovoltaic module.

[0056] Example 3: This embodiment discloses a method for preparing a high-efficiency HJT solar cell photovoltaic module. See [link to documentation]. Figure 3 This includes the following steps: S1. The high-efficiency HJT battery is fabricated into battery string 1, as follows: The busbar is welded to the main grid line on the front of the battery, and infrared lamps are used for multi-point welding during the welding process. The positive and negative terminals of adjacent battery cells are connected by a soldering iron and solder wire to form a battery string 1.

[0057] Preferably, a micro-pitch process is used in the manufacturing process.

[0058] S2. Tempered glass 2 is laid on one side of battery string 1, back plate 4 is laid on the other side of battery string 1, high cut-off film 3 is laid between battery string 1 and tempered glass 2, and high cut-off film 3 is laid between battery string 1 and back plate 4. Preferably, the tempered glass 2 is tempered coated glass, and the light transmittance of the tempered coated glass is greater than or equal to 93.5%.

[0059] Preferably, the thickness of the tempered coated glass is 1.6 mm.

[0060] S3. At a set temperature, the high-cutoff adhesive film 3 is melted and tightly bonded to the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly, as detailed below: Place the laid components into the laminator for preheating; The air inside the component is extracted by vacuuming; Heating melts the high-cutoff adhesive film 3, and pressure is applied to tightly bond the battery string 1, tempered glass 2, and backplate 4 to form a sealed assembly; After cooling, remove the sealing assembly and trim the edges.

[0061] Preferably, the heating temperature is 150°C and the pressurization pressure is 1.0 MPa.

[0062] S4. Using the principle of electroluminescence, non-destructive testing is performed on the obtained initial components to identify and remove sealed components with hidden defects, thereby improving the stability of the prepared photovoltaic modules.

[0063] S5. Install the aluminum frame 5 on the sealing component and connect it to the junction box to obtain the high-efficiency HJT photovoltaic module. After installing the aluminum frame 5 and connecting the junction box, clean, perform IV testing and finished product inspection on the high-efficiency HJT photovoltaic module.

[0064] The equipment for module manufacturing corresponds to each process flow, and the main equipment includes laser scribing machines, stringing machines, automatic stacking equipment, laminators, and automated production lines. Specifically, the welding process requires laser scribing machines, busbar welding machines, and cell stringing machines; the stacking process requires template placement machines; the lamination process requires laminators; the EL testing process requires EL meters; the framing process requires automatic framing machines; the junction box assembly process requires junction box welding machines; the cleaning process requires module flipping units; the IV testing process uses IV curve testers; the finished product inspection process requires flipping inspection units; and the packaging process requires packaging lines.

[0065] Based on the above method, this invention discloses a high-efficiency HJT cell photovoltaic module, see [link to relevant documentation]. Figure 1 The system includes a battery string 1, with tempered glass 2 and an aluminum frame 5 on one side. The tempered glass 2 is located between the battery string 1 and the aluminum frame 5, serving a protective and supportive function. The tempered glass also has good light transmittance, ensuring sufficient sunlight reaches the battery string, thereby improving photoelectric conversion efficiency. A backplate 4 is located on the other side of the battery string 1. A high-cutoff film 3 is placed between the battery string 1 and the tempered glass 2, and between the battery string 1 and the backplate 4. In HJT solar cells, the high-cutoff film forms the pn junction between the positive and negative electrodes, controlling the movement direction of electrons and holes, reducing sunlight reflection, increasing light absorption, and helping to reduce the recombination probability of electron-hole pairs, thus improving the efficiency of the solar cell. The high-cutoff film also protects the battery structure and enhances battery stability.

[0066] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A method for preparing a high-efficiency HJT cell photovoltaic module, characterized in that, Includes the following steps: High-efficiency HJT batteries are made into battery strings (1); Tempered glass (2) is laid on one side of the battery string (1), and a back plate (4) is laid on the other side of the battery string (1). A high cut-off film (3) is laid between the battery string (1) and the tempered glass (2), and a high cut-off film (3) is laid between the battery string (1) and the back plate (4). At a set temperature, the high-cutoff film (3) is melted and the battery string (1), tempered glass (2), and backplate (4) are tightly bonded to form a sealed assembly; The initial components were subjected to non-destructive testing using the principle of electroluminescence. An aluminum frame (5) is installed on the sealed assembly and a junction box is connected to obtain a high-efficiency HJT cell photovoltaic module.

2. The method for preparing a high-efficiency HJT solar photovoltaic module according to claim 1, characterized in that, The specific steps for fabricating high-efficiency HJT batteries into battery strings (1) are as follows: The busbar is welded to the main grid line on the front of the battery, and infrared lamps are used for multi-point welding during the welding process. The positive and negative electrodes of adjacent battery cells are connected by a soldering iron and solder wire to form a battery string (1).

3. The method for preparing a high-efficiency HJT solar photovoltaic module according to claim 1, characterized in that, The high-efficiency HJT battery is made into a battery string (1), and a micro-pitch process is used in the manufacturing process.

4. The method for preparing a high-efficiency HJT solar photovoltaic module according to claim 1, characterized in that, The tempered glass (2) is tempered coated glass, and the light transmittance of the tempered coated glass is greater than or equal to 93.5%.

5. The method for preparing a high-efficiency HJT solar photovoltaic module according to claim 4, characterized in that, The thickness of the tempered coated glass is 2.0mm to 1.6mm.

6. The method for preparing a high-efficiency HJT solar photovoltaic module according to claim 1, characterized in that, The steps of melting the high-cutoff adhesive film (3) at a set temperature and tightly bonding the battery string (1), tempered glass (2), and backplate (4) to form a sealed assembly are as follows: Place the laid components into the laminator for preheating; The air inside the component is extracted by vacuuming; Heating melts the high-cutoff adhesive film (3), and pressure is applied to tightly bond the battery string (1), tempered glass (2), and backplate (4) to form a sealed assembly; After cooling, remove the sealing assembly and trim the edges.

7. The method for preparing a high-efficiency HJT solar photovoltaic module according to claim 6, characterized in that, The heating melts the high-cutoff film (3), and the pressure is applied to tightly bond the battery string (1), tempered glass (2), and back plate (4) to form a sealed assembly. The heating temperature is 130~150℃, and the pressure is 0.8~1.0MPa.

8. The method for preparing a high-efficiency HJT solar photovoltaic module according to claim 1, characterized in that, The process involves installing an aluminum frame (5) on the sealing assembly and connecting it to a junction box. After installing the aluminum frame (5) and connecting it to the junction box, the high-efficiency HJT battery photovoltaic module is cleaned.

9. The method for preparing a high-efficiency HJT cell photovoltaic module according to claim 8, characterized in that, The high-efficiency HJT solar photovoltaic modules are cleaned, and after cleaning, IV testing and finished product inspection are carried out on the high-efficiency HJT solar photovoltaic modules.

10. A high-efficiency HJT solar photovoltaic module manufactured using the method according to any one of claims 1 to 9, characterized in that, The battery string (1) includes a tempered glass (2) and an aluminum frame (5) on one side of the battery string (1). The tempered glass (2) is located between the battery string (1) and the aluminum frame (5). A back plate (4) is provided on the other side of the battery string (1). A high cut-off film (3) is provided between the battery string (1) and the tempered glass (2). A high cut-off film (3) is provided between the battery string (1) and the back plate (4).

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