Photovoltaic laminate and photovoltaic module
By setting light-receiving film layers of different thicknesses in photovoltaic laminates, the absorption of light of different wavelengths is optimized, solving the problem of low efficiency of existing photovoltaic modules and achieving more efficient photoelectric conversion and structural stability.
Patent Information
- Application Number
- CN202423278356.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing photovoltaic modules have low power generation efficiency, as some light cannot be effectively absorbed, resulting in insufficient efficiency.
A photovoltaic laminate is designed, which uses a first solar cell layer and a second solar cell layer spaced apart along the thickness direction, and has light-receiving film layers of different thicknesses on both sides of the laminate to optimize the absorption of light of different wavelengths and enhance the effective utilization of light by the photovoltaic laminate.
This improves the photoelectric conversion efficiency of photovoltaic laminates, reduces reflection losses, ensures effective light absorption under different lighting conditions, and enhances overall performance and stability.
Smart Images
Figure CN223872672U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic module technology, and in particular to a photovoltaic laminate and a photovoltaic module. Background Technology
[0002] In existing technologies, solar cell modules are either single-glass or double-glass modules. A solar cell module includes: an upper tempered glass layer, an upper encapsulating film, a lower encapsulating film for the solar cells, and a backsheet or lower glass layer. Single-glass modules are mainly used in building structures such as rooftops, while double-glass modules, due to their better bifacial power generation performance, are mainly used in ground-mounted power plants. The average power generation efficiency of solar cell modules is around 22% to 23%, as some light passes through the cells and cannot be absorbed, resulting in relatively low power generation efficiency. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the first objective of the present invention is to provide a photovoltaic laminate that can improve the photoelectric conversion efficiency and structural stability of the photovoltaic laminate.
[0004] The second objective of this invention is to provide a photovoltaic module, including the photovoltaic laminate described in the above embodiments.
[0005] A photovoltaic laminate according to a first aspect of the present invention includes: a first solar cell layer and a second solar cell layer, the first solar cell layer and the second solar cell layer being spaced apart along the thickness direction of the photovoltaic laminate, and light-receiving film layers being provided on both sides of the first solar cell layer and the second solar cell layer along the thickness direction of the photovoltaic laminate, wherein the thicknesses of the light-receiving film layers of the first solar cell layer and the second solar cell layer along the thickness direction of the photovoltaic laminate are different.
[0006] According to the photovoltaic laminate of this utility model embodiment, the first and second battery cells are responsible for converting the received sunlight into electrical energy. The first and second battery cells are respectively provided with light-receiving film layers of different thicknesses on both sides of the thickness direction, so that the photovoltaic laminate can more effectively capture light in different wavelength ranges, enhance the effective utilization of different wavelengths of light by the photovoltaic laminate, reduce reflection loss, and convert more incident light into electrical energy. Moreover, no matter which side the light enters from, the photovoltaic laminate can ensure effective absorption of light, thereby improving the overall photoelectric conversion efficiency of the photovoltaic laminate.
[0007] In some embodiments, the first solar cell layer and the second solar cell layer are symmetrically distributed along the thickness direction of the photovoltaic module; the first solar cell layer is provided with a first light-receiving film layer and a second light-receiving film layer, the first light-receiving film layer is disposed on the side of the first solar cell layer away from the second solar cell layer, and the second light-receiving film layer is disposed on the side of the first solar cell layer adjacent to the second solar cell layer, and the thickness of the first light-receiving film layer is less than the thickness of the second light-receiving film layer; the second solar cell layer is provided with a third light-receiving film layer and a fourth light-receiving film layer, the third light-receiving film layer is disposed on the side of the second solar cell layer adjacent to the first solar cell layer, and the fourth light-receiving film layer is disposed on the side of the second solar cell layer away from the first solar cell layer, and the thickness of the fourth light-receiving film layer is less than the thickness of the third light-receiving film layer.
[0008] In some embodiments, the thickness of the first light-receiving film layer is H1, wherein H1 satisfies: 70nm ≤ H1 ≤ 80nm; the thickness of the second light-receiving film layer is H2, wherein H2 satisfies: 100nm ≤ H2 ≤ 120nm; and / or, the thickness of the third light-receiving film layer is H3, wherein H3 satisfies: 100nm ≤ H3 ≤ 120nm; and the thickness of the fourth light-receiving film layer is H4, wherein H4 satisfies: 70nm ≤ H4 ≤ 80nm.
[0009] In some embodiments, the device further includes an insulating support member disposed between the first battery cell layer and the second battery cell layer, wherein the first battery cell layer and the second battery cell layer are respectively connected to the insulating support member.
[0010] In some embodiments, the photovoltaic laminate further includes: a first cover plate, a second cover plate, and a sealing member, wherein the first cover plate and the second cover plate are opposite each other along the thickness direction of the photovoltaic laminate, the first cell layer is disposed between the first cover plate and the insulating support member, and the second cell layer is disposed between the second cover plate and the insulating support member; the sealing member is respectively disposed on both sides of the first cell layer and the second cell layer along the thickness direction of the photovoltaic laminate.
[0011] In some embodiments, the thickness of the first cover plate is greater than the thickness of the insulating support; and / or, the thickness of the second cover plate is greater than the thickness of the insulating support.
[0012] In some embodiments, at least one of the insulating support, the first cover plate, and the second cover plate is a transparent element; and / or, at least one of the insulating support, the first cover plate, and the second cover plate is a tempered glass element.
[0013] In some embodiments, the light-receiving film layer disposed on the side of the first battery cell layer and the second battery cell layer that is far apart from each other absorbs light wavelength L1, wherein L1 satisfies: 500nm≤L1≤800nm; and / or, the light-receiving film layer disposed on the side of the first battery cell layer and the second battery cell layer that is adjacent to each other absorbs light wavelength L2, wherein L2 satisfies: 800nm≤L2≤1100nm.
[0014] In some embodiments, the light-receiving film layer is a silicon nitride layer.
[0015] A photovoltaic module according to a second aspect of the present invention includes: a frame and a photovoltaic laminate, wherein the photovoltaic laminate is the same as the photovoltaic laminate according to the first aspect of the present invention, and the photovoltaic laminate cooperates with the frame.
[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0018] Figure 1 This is an exploded view of a photovoltaic laminate according to an embodiment of the present invention;
[0019] Figure 2 This is a cross-sectional schematic diagram of a photovoltaic laminate according to an embodiment of the present invention.
[0020] Figure label:
[0021] 100. Photovoltaic laminates;
[0022] 10. First solar cell layer; 11. First light-receiving film layer; 12. Second light-receiving film layer; 13. Second solar cell layer; 14. Third light-receiving film layer; 15. Fourth light-receiving film layer; 16. Insulating support; 17. First cover plate; 18. Second cover plate; 19. Sealing element; 20. Frame;
[0023] A. Thickness direction. Detailed Implementation
[0024] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1 and Figure 2 A photovoltaic laminate 100 according to an embodiment of the present invention includes: a first solar cell layer 10 and a second solar cell layer 13, and the photovoltaic laminate 100 has a thickness direction A.
[0025] Specifically, such as Figure 1 and Figure 2 As shown, the first solar cell layer 10 and the second solar cell layer 13 are spaced apart along the thickness direction A of the photovoltaic laminate 100. The first solar cell layer 10 and the second solar cell layer 13 are respectively provided with light-receiving film layers on both sides along the thickness direction A of the photovoltaic laminate 100. The thicknesses of the light-receiving film layers of the first solar cell layer 10 and the second solar cell layer 13 along the thickness direction A of the photovoltaic laminate 100 are different.
[0026] Combination Figure 1 and Figure 2 The first solar cell layer 10 and the second solar cell layer 13 are responsible for converting light energy into electrical energy. Both sides of the first solar cell layer 10 and the second solar cell layer 13 along the thickness direction A are covered with a light-receiving film layer to improve light absorption efficiency. The thicknesses of the light-receiving film layers along the thickness direction A of the photovoltaic laminate 100 are different for the first solar cell layer 10 and the second solar cell layer 13. A thinner light-receiving film layer can improve the absorption efficiency of the first solar cell layer 10 and the second solar cell layer 13 for short-wavelength light, while a thicker light-receiving film layer can improve the absorption efficiency of the first solar cell layer 10 and the second solar cell layer 13 for long-wavelength light.
[0027] According to the photovoltaic laminate 100 of this utility model embodiment, the first solar cell layer 10 and the second solar cell layer 13 are responsible for converting the received sunlight into electrical energy. The first solar cell layer 10 and the second solar cell layer 13 are respectively provided with light-receiving film layers of different thicknesses on both sides of the thickness direction A, so that the photovoltaic laminate 100 can more effectively capture light in different wavelength ranges, enhance the effective utilization of light of different wavelengths by the photovoltaic laminate 100, reduce reflection loss, and convert more incident light into electrical energy. Moreover, no matter which side the light enters from, the photovoltaic laminate 100 can ensure effective absorption of light, thereby improving the overall photoelectric conversion efficiency of the photovoltaic laminate 100.
[0028] According to some embodiments of this utility model, such as Figure 1 and Figure 2As shown, the first solar cell layer 10 and the second solar cell layer 13 are symmetrically distributed along the thickness direction A of the photovoltaic module. The first solar cell layer 10 is provided with a first light-receiving film layer 11 and a second light-receiving film layer 12. The first light-receiving film layer 11 is provided on the side of the first solar cell layer 10 away from the second solar cell layer 13, and the second light-receiving film layer 12 is provided on the side of the first solar cell layer 10 adjacent to the second solar cell layer 13. The thickness of the first light-receiving film layer 11 is less than the thickness of the second light-receiving film layer 12. The second solar cell layer 13 is provided with a third light-receiving film layer 14 and a fourth light-receiving film layer 15. The third light-receiving film layer 14 is provided on the side of the second solar cell layer 13 adjacent to the first solar cell layer 10, and the fourth light-receiving film layer 15 is provided on the side of the second solar cell layer 13 away from the first solar cell layer 10. The thickness of the fourth light-receiving film layer 15 is less than the thickness of the third light-receiving film layer 14.
[0029] Specifically, the thinner first light-receiving film layer 11 and the fourth light-receiving film layer 15 are respectively disposed on the surfaces of the first solar cell layer 10 and the second solar cell layer 13 that are far apart from each other along the thickness direction A of the photovoltaic laminate 100. The thicker second light-receiving film layer 12 and the third light-receiving film layer 14 are respectively disposed on the surfaces of the first solar cell layer 10 and the second solar cell layer 13 that are close to each other along the thickness direction A of the photovoltaic laminate 100. When light enters from the side where the first solar cell layer 10 is located, the first light-receiving film layer 11 on the surface of the first solar cell layer facing the light source is suitable for absorbing short-wavelength light, and the third light-receiving film layer 14 on the surface of the second solar cell layer 13 facing the light source is suitable for absorbing long-wavelength light. When light enters from the side where the second solar cell layer 13 is located, the fourth light-receiving film layer 15 on the surface of the second solar cell layer 13 facing the light source is suitable for absorbing short-wavelength light, and the second light-receiving film layer 12 on the surface of the first solar cell layer 10 facing the light source is suitable for absorbing long-wavelength light.
[0030] Therefore, by setting light-receiving film layers of different thicknesses, the first solar cell layer 10 and the second solar cell layer 13 can better match the different wavelengths of light in the solar spectrum. The symmetrical distribution of the first solar cell layer 10 and the second solar cell layer 13, along with their corresponding light-receiving film layers, along the thickness direction A of the photovoltaic module allows the photovoltaic module to exhibit good light absorption performance in both directions. Regardless of the direction from which light enters, the photovoltaic laminate 100 can effectively absorb both short-wavelength and long-wavelength light through the appropriately thick light-receiving film layer, ensuring stable performance under changing lighting conditions and guaranteeing high energy conversion efficiency regardless of the direction of the light source. This effectively improves the absorption efficiency of the photovoltaic module for various wavelengths of light, reduces energy loss due to reflection, and thus enhances the overall performance of the photovoltaic module.
[0031] According to some embodiments of this utility model, such as Figure 1 and Figure 2As shown, the thickness of the first light-receiving film layer 11 is H1, and H1 satisfies: 70nm≤H1≤80nm; the thickness of the second light-receiving film layer 12 is H2, and H2 satisfies: 100nm≤H2≤120nm; and / or, the thickness of the third light-receiving film layer 14 is H3, and H3 satisfies: 100nm≤H3≤120nm; the thickness of the fourth light-receiving film layer 15 is H4, and H4 satisfies: 70nm≤H4≤80nm.
[0032] The first light-receiving film layer 11 is located on the side of the first solar cell layer 10 away from the second solar cell layer 13, and mainly absorbs short-wavelength light. A thinner film layer helps improve the absorption efficiency of short-wavelength light while reducing reflection loss. The second light-receiving film layer 12 is located on the side of the first solar cell layer 10 adjacent to the second solar cell layer 13, and mainly absorbs long-wavelength light. A thicker film layer can better capture long-wavelength light, thereby improving the energy conversion efficiency for this portion of the light. The third light-receiving film layer 14 is located on the side of the second solar cell layer 13 adjacent to the first solar cell layer 10, and also absorbs long-wavelength light. Its thickness is similar to that of the second light-receiving film layer 12 to ensure consistent performance under symmetrical distribution. The fourth light-receiving film layer 15 is located on the side of the second solar cell layer 13 away from the first solar cell layer 10, and mainly absorbs short-wavelength light. Its thickness is the same as that of the first light-receiving film layer 11, ensuring balanced performance under bidirectional illumination conditions.
[0033] Therefore, light-receiving film layers of different thicknesses are optimized for specific wavelengths of light, thereby improving the overall light energy absorption efficiency. By limiting the thickness range of the light-receiving film layer, reflection losses at the interface are reduced, allowing more light energy to be absorbed and converted into electrical energy, thus improving the energy conversion efficiency of the photovoltaic laminate 100. It also enhances the adaptability and stability of the photovoltaic laminate 100 under different lighting conditions.
[0034] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, it also includes: an insulating support 16, which is disposed between the first battery cell layer 10 and the second battery cell layer 13, and the first battery cell layer 10 and the second battery cell layer 13 are respectively connected to the insulating support 16.
[0035] Along the thickness direction A of the photovoltaic laminate 100, the first solar cell layer 10, the insulating support 16, and the second solar cell layer 13 are arranged sequentially. The first solar cell layer 10 and the second solar cell layer 13 are respectively connected to the insulating support 16 to ensure electrical isolation and physical support between the first solar cell layer 10 and the second solar cell layer 13.
[0036] Therefore, the insulating support 16 is used to provide electrical isolation to prevent short circuits between the first cell layer 10 and the second cell layer 13. Through effective electrical isolation, the potential risks caused by electric arcs or other electrical faults are reduced, the overall reliability of the system is improved, and the safe operation of the photovoltaic module is ensured.
[0037] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the photovoltaic laminate 100 further includes: a first cover plate 17, a second cover plate 18, and a sealing member 19. The first cover plate 17 and the second cover plate 18 are opposite each other along the thickness direction A of the photovoltaic laminate 100. The first cell layer 10 is disposed between the first cover plate 17 and the insulating support member 16, and the second cell layer 13 is disposed between the second cover plate 18 and the insulating support member 16. The sealing member 19 is disposed on both sides of the first cell layer 10 and the second cell layer 13 along the thickness direction A of the photovoltaic laminate 100.
[0038] The first cover plate 17 and the second cover plate 18 are respectively disposed on both sides of the photovoltaic laminate 100 along the thickness direction A of the photovoltaic laminate 100. The first cover plate 17 and the second cover plate 18 are disposed on the outermost side of the photovoltaic laminate 100. The first cover plate 17 and the second cover plate 18 are made of transparent material, which can effectively transmit sunlight while reducing light reflection loss and improving light energy utilization efficiency. Sealing elements 19 are provided between the first cover plate 17 and the first solar cell layer 10, between the first solar cell layer 10 and the insulating support member 16, between the insulating support member 16 and the second solar cell layer 13, and between the second solar cell layer 13 and the second cover plate 18. The sealing elements 19 have good adhesive properties and are used to connect the various components. The sealing elements 19 have high light transmittance and good resistance to ultraviolet radiation and corrosion, ensuring that the photovoltaic laminate 100 can maintain high performance during long-term use and is suitable for various complex environmental conditions.
[0039] Therefore, the first cover plate 17, the second cover plate 18, and the insulating support 16 are suitable for enhancing the overall structural strength of the photovoltaic laminate 100. The first cover plate 17, the second cover plate 18, and the insulating support 16 have good light transmittance and mechanical strength, which can ensure the structural stability of the photovoltaic laminate 100. The insulating support 16 can prevent the current from short-circuiting between the two layers of solar cells, ensuring the electrical safety of the photovoltaic laminate 100. The sealing member 19 firmly connects the components together, ensuring that the photovoltaic laminate 100 maintains a stable structure under various environmental conditions and extending the life of the photovoltaic laminate 100.
[0040] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the thickness of the first cover plate 17 is greater than the thickness of the insulating support member 16; and / or, the thickness of the second cover plate 18 is greater than the thickness of the insulating support member 16.
[0041] The first cover plate 17 and the second cover plate 18 are respectively disposed on the outermost sides along the thickness direction A of the photovoltaic laminate 100. The first cover plate 17 and the second cover plate 18 provide physical protection for the photovoltaic laminate 100 to prevent damage to the internal components from the external environment (such as wind, sand, rain, snow, etc.). The thicker first cover plate 17 and the second cover plate 18 can better resist mechanical impact and external pressure. The insulating support member 16 is disposed between the first cell layer 10 and the second cell layer 13 for electrical isolation and to provide a certain physical support.
[0042] Thus, the thicker first cover plate 17 and second cover plate 18 are suitable for providing additional mechanical protection, while the thinner insulating support 16 further ensures the structural stability inside the photovoltaic laminate 100 and enhances the safety of the photovoltaic laminate 100.
[0043] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, at least one of the insulating support 16, the first cover plate 17, and the second cover plate 18 is a transparent element; and / or, at least one of the insulating support 16, the first cover plate 17, and the second cover plate 18 is a tempered glass element.
[0044] The insulating support 16, the first cover plate 17, and the second cover plate 18 are transparent, ensuring effective sunlight transmission, reducing light reflection loss, and improving light energy utilization efficiency. Tempered glass, with its high strength and impact resistance, provides better mechanical protection. The tempered glass of the insulating support 16, the first cover plate 17, and the second cover plate 18 effectively enhances the structural strength of the photovoltaic laminate 100, strengthens the overall stability and protective capabilities of the photovoltaic laminate 100, enabling it to adapt to various complex environments and extending its service life.
[0045] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the light-receiving film layer disposed on the side of the first battery cell layer 10 and the second battery cell layer 13 that is far away from each other absorbs light wavelength L1, where L1 satisfies: 500nm≤L1≤800nm; and / or, the light-receiving film layer disposed on the side of the first battery cell layer 10 and the second battery cell layer 13 that is adjacent to each other absorbs light wavelength L2, where L2 satisfies: 800nm≤L2≤1100nm.
[0046] The first light-receiving film layer 11 and the fourth light-receiving film layer 15 on the side surfaces of the first battery layer 10 and the second battery layer 13 that are far apart from each other along the thickness direction A are adapted to absorb light with wavelengths from 500 nm to 800 nm. The second light-receiving film layer 12 and the third light-receiving film layer 14 on the side surfaces of the first battery layer 10 and the second battery layer 13 that are adjacent to each other along the thickness direction A are adapted to absorb light with wavelengths from 800 nm to 1100 nm.
[0047] Therefore, the provision of light-receiving film layers on the first solar cell layer 10 and the second solar cell layer 13 enables the photovoltaic laminate 100 to more effectively utilize sunlight of different wavelengths, thereby improving the overall photoelectric conversion efficiency of the photovoltaic laminate 100.
[0048] According to some embodiments of this utility model, the light-receiving film layer is a silicon nitride layer.
[0049] The silicon nitride layer significantly reduces light reflection loss at the interface, improving light energy utilization. Its refractive index can be adjusted according to process conditions to optimize the transmittance of different wavelengths of light. As an anti-reflective coating, the silicon nitride layer effectively reduces surface reflectivity, allowing more incident light to enter the solar cell layer, thereby improving energy conversion efficiency. Silicon nitride exhibits excellent chemical stability, resisting corrosion from environmental factors such as moisture, acids, and alkalis, extending the service life of the photovoltaic laminate 100. The silicon nitride layer has high hardness and wear resistance, providing additional physical protection and enhancing the durability of the photovoltaic laminate 100. Silicon nitride maintains stable performance over a wide temperature range, making it suitable for applications under various climatic conditions, improving the practicality of the photovoltaic laminate 100.
[0050] According to the photovoltaic module of the second aspect embodiment of the present invention, such as Figure 1 As shown, the photovoltaic module includes: a frame 20 and a photovoltaic laminate 100. The photovoltaic laminate 100 is the photovoltaic laminate 100 according to the first aspect embodiment of the present invention described above, and the photovoltaic laminate 100 cooperates with the frame 20.
[0051] According to the photovoltaic module of the present invention, by applying the photovoltaic laminate 100 in the above embodiment, the photoelectric conversion efficiency of the photovoltaic module can be effectively improved, the structural strength of the photovoltaic module can be enhanced, and the frame 20 is arranged around the outer periphery of the photovoltaic laminate 100 to provide physical protection for the edge of the photovoltaic laminate 100, prevent the edge of the photovoltaic laminate 100 from being damaged during installation, transportation and use, and also reduce moisture erosion, reduce the impact of moisture on the internal components, and extend the overall service life of the photovoltaic module.
[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 this utility model.
[0053] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.
[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A photovoltaic laminate, characterized in that, include: First battery cell layer; The second solar cell layer, the first solar cell layer and the second solar cell layer are spaced apart along the thickness direction of the photovoltaic laminate, and light-receiving film layers are respectively provided on both sides of the first solar cell layer and the second solar cell layer along the thickness direction of the photovoltaic laminate. The thickness of the light-receiving film layers of the first solar cell layer and the second solar cell layer along the thickness direction of the photovoltaic laminate is different.
2. The photovoltaic laminate according to claim 1, characterized in that, The first and second battery cell layers are symmetrically distributed along the thickness direction of the photovoltaic module; The first battery cell layer is provided with a first light-receiving film layer and a second light-receiving film layer. The first light-receiving film layer is disposed on the side of the first battery cell layer away from the second battery cell layer, and the second light-receiving film layer is disposed on the side of the first battery cell layer adjacent to the second battery cell layer. The thickness of the first light-receiving film layer is less than the thickness of the second light-receiving film layer. The second battery cell layer is provided with a third light-receiving film layer and a fourth light-receiving film layer. The third light-receiving film layer is provided on the side of the second battery cell layer adjacent to the first battery cell layer, and the fourth light-receiving film layer is provided on the side of the second battery cell layer away from the first battery cell layer. The thickness of the fourth light-receiving film layer is less than the thickness of the third light-receiving film layer.
3. The photovoltaic laminate according to claim 2, characterized in that, The thickness of the first light-receiving film layer is H1, wherein H1 satisfies: 70nm≤H1≤80nm; The thickness of the second light-receiving film layer is H2, wherein H2 satisfies: 100nm ≤ H2 ≤ 120nm; and / or, The thickness of the third light-receiving film layer is H3, and H3 satisfies: 100nm≤H3≤120nm; The thickness of the fourth light-receiving film layer is H4, and H4 satisfies: 70nm≤H4≤80nm.
4. The photovoltaic laminate according to claim 2, characterized in that, Also includes: An insulating support is provided between the first battery cell layer and the second battery cell layer, and the first battery cell layer and the second battery cell layer are respectively connected to the insulating support.
5. The photovoltaic laminate according to claim 4, characterized in that, The photovoltaic laminate also includes: A first cover plate and a second cover plate are opposite each other along the thickness direction of the photovoltaic laminate. The first battery cell layer is disposed between the first cover plate and the insulating support, and the second battery cell layer is disposed between the second cover plate and the insulating support. A sealing element is provided on both sides of the first and second solar cell layers along the thickness direction of the photovoltaic laminate.
6. The photovoltaic laminate according to claim 5, characterized in that, The thickness of the first cover plate is greater than the thickness of the insulating support member; and / or, The thickness of the second cover plate is greater than the thickness of the insulating support.
7. The photovoltaic laminate according to claim 5, characterized in that, At least one of the insulating support, the first cover plate, and the second cover plate is a transparent element; and / or, At least one of the insulating support, the first cover plate, and the second cover plate is a tempered glass component.
8. The photovoltaic laminate according to claim 1, characterized in that, The light-absorbing film layer disposed on the side of the first and second battery cells that is far apart from each other absorbs light of wavelength L1, wherein L1 satisfies: 500nm ≤ L1 ≤ 800nm; and / or, The light-absorbing film layer disposed on the side adjacent to the first and second battery cells absorbs light with wavelength L2, wherein L2 satisfies: 800nm≤L2≤1100nm.
9. The photovoltaic laminate according to any one of claims 1-8, characterized in that, The light-receiving film layer is a silicon nitride layer.
10. A photovoltaic module, characterized in that, include: frame; A photovoltaic laminate, wherein the photovoltaic laminate is the photovoltaic laminate according to any one of claims 1-9, and the photovoltaic laminate is engaged with the frame.