Manufacturing method of photovoltaic module and photovoltaic module

Abstract

The invention relates to a manufacturing method of a photovoltaic module and the photovoltaic module, and the manufacturing method of the photovoltaic module comprises the steps: a welding strip is fixed on a fixed film, the surface, in contact with the fixed film, of the welding strip is provided with a black coating, and the surface, not in contact with the fixed film, of the welding strip is not provided with the black coating; the battery piece is placed on the fixing film, and the welding strip on the fixing film is aligned with the grid line on the battery piece; and laminating the battery piece and the fixing film. According to the photovoltaic module, the black coating is arranged on the surface, in contact with the fixing film, of the welding strip, so that the whole photovoltaic module is black, the glare pollution of a distributed photovoltaic system provided with the photovoltaic module is reduced, and the use experience of the photovoltaic module is improved. Meanwhile, the reliable connection between the welding strip and the grid line is realized through a lamination process, and the welding strip does not need to be welded on the battery piece, so that the manufacturing process of the photovoltaic module is simplified, the production efficiency of the photovoltaic module is improved, and the production cost of the photovoltaic module is reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a method for manufacturing a photovoltaic module and a photovoltaic module. Background Art

[0002] Photovoltaic power generation is a technology that uses the photovoltaic effect of semiconductor interfaces to convert light energy into electrical energy. Its core unit is the photovoltaic module. Photovoltaic modules usually include packaging structures, adhesive films and battery strings. The battery string is made up of multiple battery cells connected by welding ribbons.

[0003] The material of the welding ribbon is generally tin-lead alloy, so the welding ribbon appears silvery white, which leads to serious glare pollution problems in distributed photovoltaic systems (for example: photovoltaic integrated curtain walls, integrated rooftop power stations). Summary of the invention

[0004] The present application provides a method for manufacturing a photovoltaic module and a photovoltaic module, which are used to solve the glare pollution problem caused by the silver-white color of the welding strip.

[0005] A method for manufacturing a photovoltaic module provided in an embodiment of the present application includes: Fixing the welding ribbon on the fixing film, the surface of the welding ribbon in contact with the fixing film having a black coating, and the surface of the welding ribbon not in contact with the fixing film having no black coating; Placing the battery cell on the fixing film, and aligning the welding strip on the fixing film with the grid line on the battery cell; The battery sheet and the fixing film are laminated.

[0006] In one possible design, the step of fixing the welding strip on the fixing film includes: heating the fixed film to a preset temperature; placing the welding ribbon on the fixing film; The fixing film is cooled to fix the soldering ribbon to the fixing film.

[0007] In one possible design, the step of heating the fixed film to a preset temperature comprises: The entire fixed film is heated, and the preset temperature is higher than the glass transition temperature of the fixed film and lower than the melting temperature of the fixed film; or, the position where the fixed film contacts the welding strip is heated, and the preset temperature is higher than the melting temperature of the fixed film.

[0008] In one possible design, the step of fixing the welding strip on the fixing film includes: Applying light-curing adhesive to at least a portion of the fixing film at a position where the fixing film is in contact with the welding strip; placing the welding ribbon on the fixing film; The position where the solder ribbon contacts the fixing film is irradiated with light.

[0009] In a possible design, the photocurable adhesive is distributed in a dot-like or line-like manner on the fixing film.

[0010] In a possible design, in the step: before the soldering ribbon is fixed on the fixing film, the surface of the soldering ribbon has a black coating, and after the soldering ribbon is fixed on the fixing film, the black coating on the surface of the soldering ribbon that is not in contact with the fixing film is wiped off.

[0011] In a possible design, the step of erasing the black coating on the surface of the soldering ribbon that is not in contact with the fixing film includes: wiping the surface of the soldering ribbon that is not in contact with the fixing film with a cotton ball soaked in alcohol.

[0012] In a possible design, in the step: before fixing the soldering tape on the fixing film, the side of the soldering tape used for contacting the fixing film has a black coating, and the side of the soldering tape used for not contacting the fixing film does not have a black coating.

[0013] In a possible design, before fixing the soldering ribbon on the fixing film, a black coating is applied to the position of the fixing film used for contacting the soldering ribbon, and the surface of the soldering ribbon does not have the black coating.

[0014] A photovoltaic module provided in an embodiment of the present application is a photovoltaic module manufactured by the manufacturing method described above, and the photovoltaic module includes: a front packaging structure, a front film layer, a battery cell, a welding ribbon, a back film layer and a back packaging structure, the welding ribbon connects adjacent battery cells; the front film layer is the fixed film.

[0015] In the present application, the surface where the welding strip contacts the fixing film has a black coating, so that the photovoltaic module appears black as a whole, thereby reducing the glare pollution of the distributed photovoltaic system equipped with the photovoltaic module and improving the user experience of the photovoltaic module.

[0016] At the same time, since the reliable connection between the welding ribbon and the grid line is achieved through the lamination process, there is no need to weld the welding ribbon on the battery cell, which simplifies the manufacturing process of the photovoltaic module, improves the production efficiency of the photovoltaic module, and reduces the production cost of the photovoltaic module.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a photovoltaic module provided in this application in a specific embodiment; Figure 2 A schematic structural diagram of a method for manufacturing a photovoltaic module provided in the present application in a specific embodiment; Figure 3 for Figure 2 Step S1: Structural schematic diagram of fixing the welding ribbon on the fixing film; Figure 4 for Figure 2 Step S2: Structural schematic diagram of placing the battery cell on the fixed film; Figure 5 A schematic structural diagram of a method for manufacturing a photovoltaic module provided in the present application in a specific embodiment; Figure 6 A schematic structural diagram of a method for manufacturing a photovoltaic module provided in the present application in a specific embodiment; Figure 7 for Figure 6 Schematic diagram of the structure in which the soldering ribbon is fixed on the fixing film by optical fixing glue.

[0019] Reference numerals: 1- Photovoltaic modules; 11-front packaging structure; 12-front film layer; 13-battery cell; 14- welding strip; 15- back film layer; 16- back side packaging structure; 2- Light curing adhesive.

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0021] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0022] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0024] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0025] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0026] The present application embodiment provides a photovoltaic assembly 1, such as Figure 1 As shown, the photovoltaic module 1 includes: a front packaging structure 11 , a front film layer 12 , a battery cell 13 , a welding ribbon 14 , a back film layer 15 and a back packaging structure 16 , and the welding ribbon 14 connects adjacent battery cells 13 .

[0027] Among them, the front packaging structure 11, the front film layer 12, the back film layer 15 and the back packaging structure 16 package the battery string formed by the battery cell 13 and the welding ribbon 14 to ensure that the photovoltaic module 1 has a high mechanical strength, reduce the impact of hail impact, wind, mechanical vibration and other situations on the photovoltaic module 1, and improve the sealing of the photovoltaic module 1, enhance its corrosion resistance and safety.

[0028] Specifically, the front packaging structure 11 and the back packaging structure 16 can be one of the rigid materials such as tempered glass, polyethylene terephthalate (PET), polycarbonate (PC), etc., or one of the flexible materials such as polyvinyl fluoride (PVF), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), etc. The above materials have high light transmittance, can improve the photoelectric conversion efficiency of the photovoltaic module 1, and ensure the power of the photovoltaic module 1. The front film layer 12 and the back film layer 15 can be one of the materials such as ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB), EVA-POE-EVA co-extruded film (EPE), and EVA-POE co-extruded film (EP).

[0029] Furthermore, the surface of the welding ribbon 14 in contact with the front film layer 12 has a black coating, so that the photovoltaic module 1 appears black as a whole, reducing the glare pollution of the distributed photovoltaic system provided with the photovoltaic module 1, improving the user experience of the photovoltaic module 1 and the photovoltaic system, and thus helping to improve the utilization rate of the photovoltaic module 1 and the photovoltaic system. The surface of the welding ribbon 14 that does not contact the front film layer 12 does not have a black coating, so that the welding ribbon 14 can directly contact the grid line on the battery cell 13, and the direct electrical connection between the two is more reliable, and the connection resistance is small, which is conducive to the transmission of current from the grid line to the welding ribbon 14.

[0030] Specifically, the black coating may be a black resin, a pigment or a metal oxide.

[0031] The present application embodiment provides a method for manufacturing a photovoltaic module 1, which is used to manufacture a photovoltaic module 1. Figure 2~Figure 4 As shown, the manufacturing method of the photovoltaic module 1 includes: S1: The soldering ribbon 14 is fixed on the fixing film, the surface of the soldering ribbon 14 in contact with the fixing film has a black coating, and the surface of the soldering ribbon 14 not in contact with the fixing film does not have a black coating.

[0032] In this step, the fixed film is the front film layer 12. Figure 1 and Figure 3As shown, a soldering strip 14 connects the front and back sides of two adjacent cells 13, and only the portion of the soldering strip 14 connected to the front side of the cell 13 needs to be fixed on the fixing film. The front side of the cell 13 refers to the light-receiving side, and the back side refers to the backlight side.

[0033] S2: placing the battery cell 13 on the fixing film, and aligning the welding strip 14 on the fixing film with the grid line on the battery cell 13 .

[0034] In this step, the soldering strip 14 is aligned with the grid line, that is, after the battery cell 13 is placed on the fixed film, the soldering strip 14 abuts against the grid line. At the same time, during the placement process, the black coating can also play a positioning role. In addition, during the placement process, it is necessary to clamp the portion of the soldering strip 14 that is not connected to the fixed film to prevent it from affecting the contact between the battery cell 13 and the fixed film, and make the portion of the soldering strip 14 that is not in contact with the front of the battery cell 13 extend from between two adjacent battery cells 13 and extend to the back of the adjacent battery cell 13.

[0035] Furthermore, in this step, the battery cell 13 may be heated in its entirety or in part, so that the fixing film is slightly melted and then adhered to the surface of the battery cell 13 , thereby preventing the welding ribbon 14 from moving relative to the battery cell 13 .

[0036] S3: Laminating the battery cell 13 and the fixing film.

[0037] In this step, before lamination, adjacent cells 13 are electrically connected by welding strips 14, the front side of the cell 13 is provided with a front film layer 12 and a front packaging structure 11, and the back side of the cell 13 is provided with a back film layer 15 and a back packaging structure 16. Lamination is a process of bonding and fusing the various components of the photovoltaic module 1 together under certain temperature, pressure and vacuum conditions. Therefore, during the lamination process, the welding strips 14 are reliably connected to the grid lines.

[0038] In this embodiment, the surface of the welding strip 14 in contact with the fixing film has a black coating, so that the photovoltaic module 1 appears black as a whole, reducing the glare pollution of the distributed photovoltaic system equipped with the photovoltaic module 1 and improving the user experience of the photovoltaic module 1.

[0039] At the same time, since the reliable connection between the welding ribbon 14 and the grid line is achieved through the lamination process, there is no need to weld the welding ribbon 14 to the battery cell 13, which simplifies the manufacturing process of the photovoltaic module 1, improves the production efficiency of the photovoltaic module 1, and reduces the production cost of the photovoltaic module 1.

[0040] Furthermore, the fluidity of the melted black coating is lower than that of the fixed film, thereby preventing the black coating from flowing between the soldering ribbon 14 and the grid lines of the battery cell 13 during the lamination process, affecting the connection effect between the soldering ribbon 14 and the grid lines, and causing cold solder joints.

[0041] In a specific embodiment, Figure 5 As shown, step S1: fixing the soldering tape 14 on the fixing film includes: S11: heating the fixed film to a preset temperature.

[0042] S12: placing the soldering ribbon 14 on the fixing film.

[0043] S13: Cooling the fixing film to fix the soldering ribbon 14 to the fixing film.

[0044] In this embodiment, as the temperature of the fixed film increases, the fixed film gradually becomes soft. At this time, the soldering tape 14 is placed on the fixed film, and the soldering tape 14 can be embedded in the fixed film. After that, the fixed film is cooled and hardened, and the soldering tape 14 cannot move freely relative to the fixed film, thereby achieving pre-fixation of the soldering tape 14 and the fixed film. This pre-fixation method has the advantages of simple process and easy operation.

[0045] Optionally, step S11: heating the fixed film to a preset temperature includes: heating the entire fixed film, wherein the preset temperature is higher than the glass transition temperature of the fixed film and lower than the melting temperature of the fixed film. When the fixed film is heated to the preset temperature, the entire fixed film changes from a glass state to a highly elastic state. At this time, the fixed film is relatively soft, elastic, and has low fluidity. A certain pressure is applied to the soldering ribbon 14, so that the soldering ribbon 14 can be embedded in the fixed film, and the soldering ribbon 14 will not move relative to the fixed film.

[0046] It can be understood that the heating device for heating the fixed film corresponds to the entire fixed film, and there is no temperature difference or a small temperature difference at different positions of the fixed film.

[0047] Optionally, step S11: heating the fixed film to a preset temperature includes: heating the position where the fixed film contacts the soldering strip 14, wherein the preset temperature is higher than the melting temperature of the fixed film. When the position where the fixed film contacts the soldering strip 14 is heated to the preset temperature, only the position on the fixed film that contacts the soldering strip 14 enters a viscous flow state, and other positions of the fixed film remain in a glass state, that is, only the position on the fixed film that contacts the soldering strip 14 becomes softer and has a certain fluidity, so that the soldering strip 14 can be easily embedded in the fixed film and will not move relatively large relative to the fixed film. In addition, heating only part of the fixed film is conducive to reducing the amount of heat required to heat the fixed film and reducing the production cost of the photovoltaic module 1.

[0048] It can be understood that the heating device for heating the fixed film only corresponds to the position on the fixed film for contacting with the welding strip 14, and there is a large temperature difference at different positions of the fixed film.

[0049] In another specific embodiment, Figure 6As shown, the step of fixing the welding strip 14 on the fixing film includes: S14: Apply the photocuring adhesive 2 to at least a portion of the fixing film at a position where the fixing film is in contact with the soldering tape 14 .

[0050] S15: placing the soldering ribbon 14 on the fixing film.

[0051] S16: The position where the solder ribbon 14 contacts the fixing film is irradiated with light.

[0052] In this embodiment, after the light-curing adhesive 2 is irradiated with light, the light-curing adhesive 2 can pre-fix the soldering tape 14 on the fixing film. Since both applying the light-curing adhesive 2 and irradiating the light-curing adhesive 2 with light have the advantages of being easy to operate and short in time, this pre-fixing method has the advantages of high efficiency and low cost.

[0053] Optionally, the light-curing adhesive 2 is distributed in a dot-like or line-like manner on the fixing film. Figure 7 It is shown that the photocuring adhesive 2 is distributed in a dotted manner on the fixing film.

[0054] In a specific embodiment, before the soldering ribbon 14 is fixed on the fixing film, the surface of the soldering ribbon 14 has a black coating. After the soldering ribbon 14 is fixed on the fixing film, the black coating on the surface of the soldering ribbon 14 not in contact with the fixing film is wiped off.

[0055] In this embodiment, since the surface of the soldering ribbon 14 has a black coating, there is no need to carefully observe the soldering ribbon 14 when placing the soldering ribbon 14 on the fixing film, so that the operation takes a shorter time and is less difficult.

[0056] Specifically, in the step of erasing the black coating on the surface of the soldering ribbon 14 that is not in contact with the fixing film, the step includes: wiping the surface of the soldering ribbon 14 that is not in contact with the fixing film with a cotton ball soaked in alcohol.

[0057] When the material of the black coating can be dissolved in alcohol, the black coating can be wiped off by wiping the surface of the soldering ribbon 14 that is not in contact with the fixing film with a cotton ball soaked in alcohol. This method has the advantage of being easy to operate. In addition, after wiping the soldering ribbon 14 with a cotton ball soaked in alcohol, the fixing film and the soldering ribbon 14 are dried to volatilize the alcohol, thereby preventing the alcohol from affecting other structures of the photovoltaic module 1.

[0058] It is understandable that when the material of the black coating is insoluble in alcohol, the black coating on the surface of the welding strip 14 that is not in contact with the fixing film can be removed by grinding with sandpaper or other methods.

[0059] In another specific embodiment, before the soldering ribbon 14 is fixed on the fixing film, the side of the soldering ribbon 14 for contacting the fixing film has a black coating, and the side of the soldering ribbon 14 for not contacting the fixing film does not have a black coating.

[0060] In this embodiment, since the soldering ribbon 14 has a black coating on only one side, there is no need to remove the black coating on the surface of the soldering ribbon 14 that is not in contact with the fixing film after the soldering ribbon 14 is fixed on the fixing film, which is beneficial to simplify the production steps of the photovoltaic module 1.

[0061] In another specific embodiment, before fixing the soldering ribbon 14 on the fixing film, a black coating is applied to the position of the fixing film that is used to contact the soldering ribbon 14 , and the surface of the soldering ribbon 14 does not have the black coating.

[0062] In this embodiment, since the black coating is located on the fixing film, there is no need to carefully observe the soldering ribbon 14 when placing the soldering ribbon 14 on the fixing film, and the black coating can indicate the placement position of the soldering ribbon 14, thereby reducing the probability of misplacing the soldering ribbon 14. At the same time, there is no need to remove the black coating on the surface of the soldering ribbon 14 that is not in contact with the fixing film after the soldering ribbon 14 is fixed on the fixing film, which is conducive to simplifying the production steps of the photovoltaic module 1.

[0063] It can be understood that for a double-sided photovoltaic module that can receive light and generate current on both sides, the fixed film is the front film layer 12 or the back film layer 15. Specifically, the manufacturing method of the photovoltaic module 1 includes: fixing the welding ribbon 14 on the front film layer 12 or the back film layer 15, placing the battery cell 13 on the front film layer 12 or the back film layer 15, and extending the welding ribbon 14 from the front or back of one battery cell 13 to the back or front of the adjacent battery cell 13, and then placing the back film layer 15 or the front film layer 12 and the front packaging structure 11 and the back packaging structure 16 for lamination.

[0064] In the above embodiments, the grid lines on the battery cell 13 may include both main grids and fine grids. In this case, in step S2: the battery cell 13 is placed on a fixed film, and the solder strips 14 on the fixed film are aligned with the grid lines on the battery cell 13, and the solder strips 14 are aligned with the main grids; the grid lines on the battery cell 13 may also include only fine grids, that is, a battery without a main grid. In this case, in step S2: the battery cell 13 is placed on a fixed film, and the solder strips 14 on the fixed film are aligned with the grid lines on the battery cell 13, and the solder strips 14 are aligned with the fine grids.

[0065] In addition, the types of battery cells 13 include but are not limited to Passivated Emitter Rear Cell (PERC), Tunnel Oxide Passivated Contact (TOPCon), Heterojunction with Intrinsic Thin-film (HJT), perovskite cells, etc.

[0066] For PERC cells, along the thickness direction, PERC cells include the front surface metal silver electrode, the front surface silicon nitride passivation layer, the phosphorus layer emitter, the P-type base silicon layer, the local aluminum back field, the metal aluminum back electrode, and the back passivation layer (Al2O3 / SiNx). PERC cells use a passivation film to passivate the back, replacing the full aluminum back field, enhancing the internal back reflection of light in the silicon base, reducing the recombination rate on the back, and increasing the efficiency of the cell by 0.5%-1%.

[0067] For TOPCon cells, along the thickness direction, TOPCon cells include metal silver electrodes, front surface silicon nitride passivation layers, boron-doped emitters, N-type base silicon layers, diffused doping layers, ultra-thin silicon oxide, doped polysilicon, silicon nitride, and metal silver electrodes. The back of the cell is composed of an ultra-thin silicon oxide layer (1nm~2nm) and a phosphorus-doped microcrystalline amorphous mixed Si film, which together form a passivation contact structure. This structure can block the recombination of minority carrier holes and increase the open circuit voltage and short circuit current of the cell. The ultra-thin oxide layer allows majority electrons to tunnel into the polysilicon layer while blocking the recombination of minority carrier holes. The good passivation effect of ultra-thin silicon oxide and heavily doped silicon film causes the energy band on the silicon wafer surface to bend, thereby forming a field passivation effect, greatly increasing the probability of electron tunneling, and reducing the contact resistance, which increases the open circuit voltage and short circuit current of the cell, thereby improving the cell conversion efficiency.

[0068] For HJT cells, along the thickness direction, the HJT cells include a front low-temperature silver electrode, a front conductive film, an N-type amorphous silicon film, an intrinsic amorphous silicon film, an N-type base silicon layer, an intrinsic amorphous silicon film, a P-type amorphous silicon film, a back conductive film, and a back low-temperature silver electrode.

[0069] For perovskite cells, along the thickness direction, the perovskite cell includes substrate material, conductive film, electron transport layer (titanium dioxide), perovskite absorption layer (hole transport layer), and metal cathode. Perovskite materials have a high light absorption coefficient and a long carrier diffusion distance. After the photons absorbed by the perovskite material are converted into electrons, they are easily collected by the electrode with low loss, so they can generate higher photoelectric voltage and current, making perovskite show higher photoelectric conversion efficiency.

[0070] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for manufacturing a photovoltaic module, characterized in that: The method for manufacturing the photovoltaic module (1) comprises: Fixing a welding strip (14) on a fixing film, wherein a surface of the welding strip (14) in contact with the fixing film has a black coating, and a surface of the welding strip (14) not in contact with the fixing film does not have a black coating; Placing a battery cell (13) on the fixing film, and aligning the welding strip (14) on the fixing film with the grid lines on the battery cell (13); The battery sheet (13) and the fixing film are laminated.

2. The method for manufacturing a photovoltaic module according to claim 1, characterized in that: Step: fixing the welding strip (14) on the fixing film comprises: heating the fixed film to a preset temperature; placing the welding strip (14) on the fixing film; The fixing film is cooled to fix the welding strip (14) to the fixing film.

3. The method for manufacturing a photovoltaic module according to claim 2, characterized in that: Step: heating the fixed film to a preset temperature comprises: Heating the entire fixed film, wherein the preset temperature is higher than the glass transition temperature of the fixed film and lower than the melting temperature of the fixed film; Alternatively, the position where the fixing film contacts the welding strip (14) is heated, and the preset temperature is higher than the melting temperature of the fixing film.

4. The method for manufacturing a photovoltaic module according to claim 1, characterized in that: Step: fixing the welding strip (14) on the fixing film comprises: Applying light-curing adhesive (2) to at least a portion of the fixing film at a position where the fixing film is in contact with the welding strip (14); Placing the welding strip (14) on the fixing film; The position where the welding strip (14) contacts the fixing film is irradiated with light.

5. The method for manufacturing a photovoltaic module according to claim 4, characterized in that: The light-curing adhesive (2) is distributed in a dot-like or line-like manner on the fixing film.

6. The method for manufacturing a photovoltaic module according to any one of claims 1 to 5, characterized in that: In the step: before the soldering strip (14) is fixed on the fixing film, the surface of the soldering strip (14) is provided with a black coating, and after the soldering strip (14) is fixed on the fixing film, the black coating on the surface of the soldering strip (14) not in contact with the fixing film is wiped off.

7. The method for manufacturing a photovoltaic module according to claim 6, characterized in that: Step: erasing the black coating on the surface of the soldering tape (14) not in contact with the fixing film comprises: wiping the surface of the soldering tape (14) not in contact with the fixing film with a cotton ball soaked in alcohol.

8. The method for manufacturing a photovoltaic module according to any one of claims 1 to 5, characterized in that: In the step: before fixing the soldering tape (14) on the fixing film, the surface of the soldering tape (14) used for contacting the fixing film has a black coating, and the surface of the soldering tape (14) not used for contacting the fixing film does not have a black coating.

9. The method for manufacturing a photovoltaic module according to any one of claims 1 to 5, characterized in that: In the step: before fixing the soldering strip (14) on the fixing film, a black coating is applied to a position of the fixing film for contacting the soldering strip (14), and the surface of the soldering strip (14) does not have a black coating.

10. A photovoltaic module, characterized in that: The photovoltaic module (1) is a photovoltaic module (1) manufactured by the manufacturing method according to any one of claims 1 to 9, and the photovoltaic module (1) comprises: a front packaging structure (11), a front film layer (12), a battery cell (13), a welding ribbon (14), a back film layer (15) and a back packaging structure (16), wherein the welding ribbon (14) connects adjacent battery cells (13); The front film layer (12) is the fixed film.

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