Photovoltaic module and photovoltaic system

Abstract

A photovoltaic module (100) and a photovoltaic system. The photovoltaic module (100) includes a panel (10), a backsheet (20), and a cell layer (30), where the backsheet (20) and the panel (10) are stacked, the cell layer (30) is located between the panel (10) and the backsheet (20), and a reinforcement layer (40) is provided between the panel (10) and the cell layer (30) and / or between the backsheet (20) and the cell layer (30), the reinforcement layer (40) being made of a glass fiber composite resin material, with glass fiber accounting for 50% - 65%.

Description

Photovoltaic modules and photovoltaic systems

[0001] Priority information

[0002] This application claims priority and benefits to patent application No. 202411181192.0, filed with the China National Intellectual Property Administration on August 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of photovoltaic technology, and more particularly to a photovoltaic module and a photovoltaic system. Background Technology

[0004] Currently, with the increasing prominence of severe problems such as energy shortages and climate emissions, countries around the world are paying more and more attention to clean and pollution-free renewable energy. Solar photovoltaic (PV) modules, using solar energy as a green renewable energy source, have seen large-scale application. PV modules are typically made by laminating tempered glass and solar cells, framing them with an aluminum frame, and sealing the edges with silicone. However, the inventors believe that these PV modules are generally quite heavy due to the tempered glass and aluminum frame, making them unsuitable for roofs that cannot bear the weight. In related technologies, replacing glass with transparent panels and backsheets significantly reduces weight, but this drastically reduces the impact resistance of the lightweight modules. Impacts from hail can cause microcracks in the solar cells, damaging the modules and affecting their lifespan. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, this application proposes a photovoltaic module, including a panel, a backsheet, and a cell layer, wherein the backsheet and the panel are stacked together, the cell layer is located between the panel and the backsheet, and a reinforcement layer is provided between the panel and the cell layer and / or between the backsheet and the cell layer. The reinforcement layer is made of glass fiber composite resin material, and the proportion of glass fiber is 50% to 65%.

[0007] The photovoltaic module provided in this application improves its strength and impact resistance by incorporating reinforcement layers between the panel and the cell layer, and between the backsheet and the cell layer, thereby extending its service life. Furthermore, using glass fiber as the reinforcement material further enhances the strength of the reinforcement layer, enabling the photovoltaic module to achieve the required strength while maintaining a lightweight design.

[0008] This application proposes a photovoltaic system comprising multiple photovoltaic modules electrically connected together.

[0009] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0010] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0011] Figure 1 is a schematic diagram of the structure of a photovoltaic module according to an embodiment of this application;

[0012] Figure 2 is a structural schematic diagram of a photovoltaic module according to an embodiment of this application;

[0013] Figure 3 is a structural schematic diagram of the photovoltaic module according to the embodiment of this application when the front side is facing up;

[0014] Figure 4 is a schematic diagram of the structure of the photovoltaic module with the back side facing up according to the embodiment of this application.

[0015] Explanation of reference numerals in the attached drawings: 100, photovoltaic module; 10, panel; 20, backsheet; 30, cell layer; 31, cell; 32, cell string; 33, first solder strip; 34, second solder strip; 35, busbar; 36, lead-out terminal; 37, positive electrode; 38, negative electrode; 40, reinforcement layer; 50, first encapsulating film layer; 60, second encapsulating film layer; 70, eyelet. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0018] Please refer to Figures 1 and 2. The photovoltaic module 100 of this application includes a panel 10, a backsheet 20, and a cell layer 30. The backsheet 20 is stacked with the panel 10, and the cell layer 30 is located between the panel 10 and the backsheet 20. A reinforcing layer 40 is provided between the panel 10 and the cell layer 30 and / or between the backsheet 20 and the cell layer 30. The reinforcing layer 40 is made of glass fiber composite resin material, and the proportion of glass fiber is 50% to 65%.

[0019] Thus, by providing a reinforcing layer 40 between the panel 10 and the cell layer 30, and between the backsheet 20 and the cell layer 30, the strength of the photovoltaic module 100 can be improved, its impact resistance enhanced, thereby extending its service life. Furthermore, using glass fiber as a reinforcing material increases the strength of the reinforcing layer 40, allowing the photovoltaic module 100 to achieve the required strength while maintaining a lightweight design.

[0020] Specifically, a photovoltaic module 100 refers to a smallest indivisible photovoltaic cell assembly that is encapsulated and internally connected, capable of providing DC power output independently. It is a device that converts light energy into electrical energy. Many materials can produce the photovoltaic effect, such as monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, and copper indium selenide. When light shines on the surface of the photovoltaic module 100, some photons are absorbed by the silicon material. The energy of the photons is transferred to silicon atoms, causing electrons to transition and become free electrons that accumulate on both sides of the PN junction, thus forming a potential difference. When an external circuit is connected, under the influence of this voltage, current will flow through the external circuit, generating a certain output power.

[0021] The solar cell layer 30 can receive light and convert solar energy into electrical energy. The front panel 10 is located on the front of the solar cell layer 30, and the back panel 20 is located on the back of the solar cell layer 30. The front of the solar cell layer 30 refers to the main light-receiving surface of the solar cell layer 30, and the back is the surface opposite to the front of the solar cell layer 30.

[0022] The panel 10 and backsheet 20 constitute the outermost layer of the photovoltaic module 100, serving to seal, insulate, and protect the cell layer 30, thereby improving the mechanical properties of the photovoltaic module 100. The panel 10 and backsheet 20 protect the cell layer 30 from damage caused by climate changes, such as high temperatures, low temperatures, rain, or hail. They also protect the cell layer 30 from damage during transportation due to collisions, effectively improving the photovoltaic module 100's ability to withstand harsh environments.

[0023] The reinforcement layer 40 can be provided between the panel 10 and the battery cell layer 30, or between the back panel 20 and the battery cell layer 30, or both between the panel 10 and the battery cell layer 30 and between the back panel 20 and the battery cell layer 30.

[0024] Glass fiber composite resin materials are functional materials made by using glass fiber and its products (glass fiber yarn, cloth, mat, etc.) as reinforcing materials and synthetic resin as the matrix material, through a composite process. Examples include glass fiber reinforced epoxy resin, glass fiber reinforced polyester resin, glass fiber reinforced polyimide resin, glass fiber reinforced phenolic resin, or glass fiber reinforced fluorocarbon resin, etc.

[0025] Glass fiber is a high-performance inorganic non-metallic material with excellent insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Glass fiber can be produced using non-woven fiberglass cloth, plain weave fiberglass cloth, or twill weave fiberglass cloth.

[0026] The glass fiber ratio can be the ratio of the weight of the glass fiber to the sum of the weights of the glass fiber and the resin. The glass fiber ratio can be a point value between 50% and 65%, or a range between any two. For example, glass fiber ratios of 50%, 55%, 60%, and 65% are possible.

[0027] Please refer to Figure 1. In some embodiments, the composite resin is either acrylic resin or epoxy resin, and the proportion of the composite resin is 35% to 50%.

[0028] This results in the reinforcement layer 40 having high strength, high toughness, good transparency, and low water vapor permeability.

[0029] Specifically, the proportion of composite resin can be the ratio of the weight of the resin to the sum of the weights of the glass fiber and the resin. The proportion of composite resin can be a point value between 35% and 50%, or a range between any two. For example, the proportions of composite resin can be 35%, 40%, 45%, and 50%.

[0030] In one embodiment, the epoxy resin can be a brominated epoxy resin. Brominated epoxy resin is an epoxy resin containing bromine in its molecular structure and possessing self-extinguishing properties. Brominated epoxy resin has good self-extinguishing properties, heat resistance, and low toxicity. In addition to the excellent electrical insulation and adhesion of general epoxy resins, brominated epoxy resin also has excellent flame retardant properties.

[0031] Please refer to Figure 1. In some embodiments, the thickness of the reinforcing layer 40 is 0.3 mm to 0.45 mm.

[0032] Thus, by limiting the thickness of the reinforcing layer 40 within the aforementioned range, the reinforcing layer 40 can achieve both high strength and lightweight properties.

[0033] Specifically, the thickness of the reinforcing layer 40 can be any point value between 0.3mm and 0.45mm, or a range between both. For example, the thickness of the reinforcing layer 40 can be 0.3mm, 0.35mm, 0.4mm, or 0.45mm.

[0034] Please refer to Figure 2. In some embodiments, the reinforcing layer 40 is made of a reinforced composite double-layer PET material, and the thickness of the reinforcing layer 40 is 0.45mm-0.65mm.

[0035] This gives the reinforcing layer 40 high barrier properties, improving the impact resistance of the photovoltaic module 100 and thus extending its service life. Furthermore, by limiting the thickness of the reinforcing layer 40 within the aforementioned range, the strength of the reinforcing layer 40 can be met while achieving a lightweight design.

[0036] Specifically, the reinforcing layer 40 on the front side of the battery cell layer 30 and the reinforcing layer 40 on the back side of the battery cell layer 30 can be obtained by cutting the same finished material of the reinforcing layer 40.

[0037] The thickness of the reinforcing layer 40 can be any point value between 0.45mm and 0.65mm or a range between the two. For example, the thickness of the reinforcing layer 40 is 0.45mm, 0.5mm, 0.55mm, 0.6mm, or 0.65mm.

[0038] Please refer to Figure 2. In some embodiments, the light transmittance of the reinforcement layer 40 is greater than 85%.

[0039] Thus, by limiting the light transmittance of the reinforcing layer 40 to the above range, the light transmittance of the reinforcing layer 40 can meet the light transmission requirements, allowing the solar cell layer 30 to receive sufficient light.

[0040] Specifically, the light transmittance of the reinforcing layer 40 can be 85%, 90%, 95%, etc. The light transmittance is affected by raw materials, processing technology, processing conditions, etc.

[0041] Please refer to Figures 1 and 2. In some embodiments, panel 10 is a light-transmitting plate, which is one of PET board, CPC board and HPC board.

[0042] This design ensures that panel 10 has good light transmittance, allowing the front of the solar cell layer 30 to receive light normally without affecting its power generation efficiency. Furthermore, the use of flexible polymer material in panel 10 reduces its weight and allows it to be bent into different shapes to suit various design requirements. Additionally, the selection of the solar cell layer 30 can improve power generation efficiency.

[0043] Specifically, panel 10 can be flat or curved. Panel 10 can be made from purchased finished panel materials, which can be cut into suitable shapes and sizes using an offline cutting machine in the workshop, and the cut-off materials can be collected for later use.

[0044] Please refer to Figures 1 and 2. In some embodiments, the back panel 20 is a light-transmitting panel, which is one of PET board, CPC board and HPC board.

[0045] This design ensures that the backsheet 20 has good light transmittance, allowing the back of the solar cell layer 30 to receive light normally without affecting its power generation efficiency. Furthermore, the backsheet 20 is made of a flexible polymer material, which reduces its weight and allows it to be bent into different shapes to suit various design requirements and mounting substrates. Additionally, the choice of solar cell layer 30 can improve power generation efficiency.

[0046] Specifically, the backplate 20 can be flat or curved. The backplate 20 can be made from purchased finished backplate materials, which can be cut into suitable shapes and sizes using an offline cutting machine in the workshop, and the cut-off materials can be collected for later use.

[0047] The materials of the panel 10 and the back panel 20 can be the same or different. That is, the back panel 20 can be obtained by cutting the leftover material of the panel 10 or by cutting the finished material of the back panel 20 which is the same material as the panel 10. Alternatively, the back panel 20 can be obtained by cutting the finished material of the back panel 20 which is different from the material of the panel 10.

[0048] Please refer to Figure 1. In some embodiments, the thickness of the panel 10 is 0.18 mm to 0.3 mm; and / or, the thickness of the back panel 20 is 0.18 mm to 0.4 mm.

[0049] Thus, by limiting the thickness of the panel 10 and the back plate 20 to the above-mentioned range, the strength of the panel 10 and the back plate 20 can meet the requirements, and the strength of the panel 10 and the back plate 20 can meet the protection requirements for the battery cell layer 30.

[0050] Specifically, the thickness of panel 10 can be any point value between 0.18mm and 0.3mm, or a range between any two. For example, the thickness of panel 10 is 0.18mm, 0.2mm, 0.22mm, 0.24mm, 0.26mm, 0.28mm, or 0.3mm.

[0051] The thickness of the backplate 20 can be any point value or a range between 0.18mm and 0.4mm. For example, the thickness of the backplate 20 is 0.18mm, 0.2mm, 0.22mm, 0.24mm, 0.26mm, 0.28mm, 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, or 0.4mm.

[0052] The thickness of the front panel 10 and the back panel 20 can be the same or different. For example, the thickness of both the front panel 10 and the back panel 20 can be 0.24 mm, or the thickness of the front panel 10 can be 0.27 mm and the thickness of the back panel 20 can be 0.32 mm.

[0053] Please refer to Figure 2. In some embodiments, the panel 10 and / or the back panel 20 are made of one of PVDF film, PVF film, or ETFE film.

[0054] In this way, the panel 10 and the back panel 20 can effectively prevent moisture from entering the photovoltaic module 100, while also resisting wear and scratches during daily use, effectively extending the service life of the photovoltaic module 100.

[0055] Specifically, PVDF is a highly non-reactive thermoplastic fluoropolymer that is soluble in strong polar solvents such as dimethylacetamide and has excellent properties such as anti-aging, chemical resistance, weather resistance, and UV radiation resistance.

[0056] PVF is made from polyvinyl fluoride resin through a biaxial stretching process. It has excellent weather resistance, superb mechanical properties, and resistance to corrosion from a wide range of chemicals.

[0057] ETFE is the toughest fluoroplastic, with good heat resistance, chemical resistance, electrical insulation, radiation resistance, and mechanical properties.

[0058] The materials of the panel 10 and the back panel 20 can be the same or different. For example, the panel 10 can be made of PVDF film, and the back panel 20 can be made of ETFE film.

[0059] Please refer to Figure 2. In some embodiments, the thickness of the panel 10 and / or the back panel 20 is 0.25mm-0.45mm.

[0060] Thus, by limiting the thickness of the panel 10 and the back panel 20 to the above range, the panel 10 and the back panel 20 can meet the strength requirements while achieving lightweighting.

[0061] Specifically, the thickness of the panel 10 and the back panel 20 can be any point value or a range between 0.25mm and 0.45mm. For example, the thickness of the panel 10 is 0.25mm, 0.3mm, 0.35mm, 0.4mm, and 0.45mm, and the thickness of the back panel 20 is 0.26mm, 0.31mm, 0.36mm, 0.41mm, and 0.44mm.

[0062] Please refer to Figures 3 and 4. In some embodiments, the battery cell layer 30 includes a plurality of battery strings 32 connected in series, each battery string 32 includes a plurality of battery cells 31, and all the battery cells 31 in each battery string 32 are connected in series.

[0063] In this way, connecting multiple solar cells 31 in series can improve the efficiency of the solar cell layer 30, thereby increasing the utilization rate of solar energy.

[0064] Specifically, the solar cell 31 is preferably one of the following: XBC, MWT, or shingled solar cells without metal grid lines, where both positive and negative metal electrodes are led out from the back side. A secondary preference is a solar cell with grid lines on both the front and back sides, such as PERC, TOPCON, or HJT. This maintains the consistency of the appearance of the solar cell layer 30, preventing the metal grid lines and metal electrodes from affecting the front appearance of the solar cell layer 30, thereby improving aesthetics.

[0065] Multiple solar cells 31 connected in series can be multiple complete solar cells 31 connected in series, multiple half solar cells 31 connected in series, multiple third solar cells 31 connected in series, or multiple quarter solar cells 31 connected in series.

[0066] In one embodiment, the battery cell layer 30 includes three battery strings 32 connected in series, each battery string 32 consisting of 12 half-cells 31 connected in series, and the power range of the battery cell layer 30 is between 100W and 110W.

[0067] In another embodiment, the battery cell layer 30 includes 6 battery strings 32, 3 battery strings 32 are connected in series to form a battery string group 32, each battery string 32 consists of 12 half battery cells 31 connected in series, and 2 battery string groups 32 are connected in parallel. The power range of the battery cell layer 30 is between 200W and 210W.

[0068] Referring to Figure 3, when fabricating the battery cell layer 30, multiple cut battery cells 31 can be arranged sequentially. The battery cells 31 can be interconnected on the back side of the battery cell 31 using segmented solder ribbons 33 and 34. The positive (negative) electrode on the back side of the previous battery cell 31 is connected to the negative (positive) electrode on the back side of the next battery cell 31 and heated together. This process is repeated to connect all the battery cells 31 of each battery string 31 in series to form a battery string 31. The battery cell layer 30 may also include a busbar 35, a junction box (not shown), and diodes (not shown). The welded battery strings 31 are arranged and welded to the busbar 35 to form a mainstream series-parallel circuit structure. The lead-out terminal 36 of the busbar 35 is connected in series with the bypass diode in the junction box to bring out the positive and negative terminals. The positive terminal 37 and the negative terminal 38 can be located on the same side of the length direction of the battery cell layer 30 and in the middle position of the width direction of the battery cell layer 30.

[0069] Please refer to Figures 1 and 2. In some embodiments, a first encapsulating film layer 50 is provided between the panel 10 and the reinforcing layer 40, and between the back plate 20 and the reinforcing layer 40. The first encapsulating film layer 50 bonds the panel 10 and the reinforcing layer 40, and bonds the back plate 20 and the reinforcing layer 40. The first encapsulating film layer 50 is made of one of EVA, POE or EPE materials.

[0070] Thus, the panel 10 and the reinforcing layer 40, and the backplate 20 and the reinforcing layer 40, can be connected and fixed by the first encapsulating film layer 50, achieving lamination encapsulation of the panel 10 and the reinforcing layer 40, and the backplate 20 and the reinforcing layer 40, forming a stable and reliable structure. In addition, the first encapsulating film layer 50 can act as a buffer between the panel 10 and the reinforcing layer 40, and between the backplate 20 and the reinforcing layer 40, preventing breakage during lamination. The first encapsulating film layer 50 uses a high-cutoff encapsulating film, giving it high light transmittance, allowing light to pass through.

[0071] Specifically, the panel 10 is bonded to the side of the reinforcing layer 40 located on the front of the battery cell layer 30 away from the battery cell layer 30 via the first encapsulating film layer 50, and the back panel 20 is bonded to the side of the reinforcing layer 40 located on the back of the battery cell layer 30 away from the battery cell layer 30 via the first encapsulating film layer 50.

[0072] EVA film has high light transmittance and good resistance to UV and damp heat yellowing, and it has good adhesion to the panel 10 and the back panel 20, while also being relatively low in cost.

[0073] POE films have the characteristics of low water vapor permeability, high volume resistivity, and good resistance to PID (potential-induced decay).

[0074] EPE film is a three-layer composite film, formed by co-extrusion of EVA / POE / EVA. It combines the advantages of both POE and EVA, possessing the high water resistance, high volume resistivity, and high PID resistance of POE, as well as the good resistance to UV and humidity yellowing and adhesion of EVA. By adjusting the layer thickness ratio, EPE film can ensure the reliability of POE and the processability of EVA.

[0075] The material of the first encapsulating film layer 50 between the panel 10 and the reinforcing layer 40 can be the same as or different from the material of the first encapsulating film layer 50 between the backplate 20 and the reinforcing layer 40.

[0076] Please refer to Figures 1 and 2. In some embodiments, the thickness of the first encapsulating film layer 50 is 0.3 mm to 0.7 mm.

[0077] Thus, if the thickness of the first encapsulating film layer 50 is too thin, reliable bonding between the panel 10 and the reinforcing layer 40, and between the backsheet 20 and the reinforcing layer 40, cannot be achieved; if the thickness of the first encapsulating film layer 50 is too thick, it will affect the performance of the photovoltaic module 100. By limiting the thickness of the first encapsulating film layer 50 within the aforementioned range, reliable bonding between the panel 10 and the reinforcing layer 40, and between the backsheet 20 and the reinforcing layer 40, can be achieved while ensuring the performance of the photovoltaic module 100.

[0078] Specifically, the thickness of the first encapsulating film layer 50 can be any value between 0.3mm and 0.7mm, or a range between any two. For example, the thickness of the first encapsulating film layer 50 is 0.3mm, 0.4mm, 0.5mm, 0.6mm, or 0.7mm.

[0079] Please refer to Figures 1 and 2. In some embodiments, a second encapsulating film layer 60 is provided between the reinforcing layer 40 and the battery cell layer 30. The second encapsulating film layer 60 bonds the reinforcing layer 40 and the battery cell layer 30. The second encapsulating film layer 60 is made of POE film material.

[0080] Thus, the reinforcing layer 40 and the cell layer 30 can be connected and fixed together by the second encapsulating film layer 60, achieving lamination encapsulation of the reinforcing layer 40 and the cell layer 30 to form a stable and reliable structure. In addition, the second encapsulating film layer 60 acts as a buffer between the reinforcing layer 40 and the cell layer 30, preventing cell breakage during lamination. The second encapsulating film layer 60 uses POE film material, giving it high light transmittance, allowing light to pass through, and low moisture transmittance.

[0081] Specifically, the reinforcement layer 40 is bonded to the front and back of the cell layer 30 via the second encapsulating film layer 60. The photovoltaic module 100 is stacked from front to back in the following order: panel 10, first encapsulating film layer 50, reinforcement layer 40, second encapsulating film layer 60, cell layer 30, second encapsulating film layer 60, reinforcement layer 40, first encapsulating film layer 50, and backsheet 20.

[0082] POE is a copolymer of ethylene and octene. It has a saturated aliphatic chain structure and fewer tertiary carbon atoms in its molecular chain, exhibiting good weather resistance, UV aging resistance, and excellent heat and low temperature resistance.

[0083] Please refer to Figures 1 and 2. In some embodiments, the thickness of the second encapsulating film layer 60 is 0.4 mm to 0.7 mm.

[0084] Thus, if the thickness of the second encapsulating film layer 60 is too thin, reliable adhesion between the reinforcing layer 40 and the cell layer 30 cannot be achieved; if the thickness of the second encapsulating film layer 60 is too thick, it will affect the performance of the photovoltaic module 100. By limiting the thickness of the second encapsulating film layer 60 within the above-mentioned range, reliable adhesion between the reinforcing layer 40 and the cell layer 30 can be achieved while ensuring the performance of the photovoltaic module 100.

[0085] Specifically, the thickness of the second encapsulating film layer 60 can be any value between 0.4mm and 0.7mm, or a range between both. For example, the thickness of the second encapsulating film layer 60 can be 0.4mm, 0.5mm, 0.6mm, or 0.7mm.

[0086] Please refer to Figures 1 and 2. In some embodiments, the photovoltaic module 100 has a symmetrical structure about the cell layer 30 in the thickness direction.

[0087] This gives the photovoltaic module 100 a stable structure, which improves its impact resistance and extends its service life.

[0088] Specifically, the panel 10 and the back panel 20 can be made of the same material, for example, both the panel 10 and the back panel 20 can be made of PET board. The panel 10 and the back panel 20 can have the same thickness, for example, both the panel 10 and the back panel 20 can be 0.25mm thick.

[0089] The reinforcing layer 40 between the panel 10 and the battery cell layer 30, and the reinforcing layer 40 between the backplate 20 and the battery cell layer 30, can be made of the same material. For example, both the reinforcing layer 40 between the panel 10 and the battery cell layer 30, and the reinforcing layer 40 between the backplate 20 and the battery cell layer 30, can be made of glass fiber reinforced epoxy resin. The reinforcing layer 40 between the panel 10 and the battery cell layer 30, and the reinforcing layer 40 between the backplate 20 and the battery cell layer 30, can have the same thickness. For example, both the reinforcing layer 40 between the panel 10 and the battery cell layer 30, and the reinforcing layer 40 between the backplate 20 and the battery cell layer 30, can have a thickness of 0.36 mm.

[0090] The first encapsulating film layer 50 between the panel 10 and the reinforcing layer 40 and the first encapsulating film layer 50 between the backplate 20 and the reinforcing layer 40 can be made of the same material. For example, both the first encapsulating film layer 50 between the panel 10 and the reinforcing layer 40 and the first encapsulating film layer 50 between the backplate 20 and the reinforcing layer 40 can be made of POE film. The first encapsulating film layer 50 between the panel 10 and the reinforcing layer 40 and the first encapsulating film layer 50 between the backplate 20 and the reinforcing layer 40 can have the same thickness. For example, both the first encapsulating film layer 50 between the panel 10 and the reinforcing layer 40 and the first encapsulating film layer 50 between the backplate 20 and the reinforcing layer 40 can have a thickness of 0.5 mm.

[0091] The second encapsulating film layer 60 between the reinforcing layer 40 and the battery cell layer 30 near the panel 10 and the second encapsulating film layer 60 between the reinforcing layer 40 and the battery cell layer 30 near the backplate 20 can have the same thickness. For example, the thickness of the second encapsulating film layer 60 between the reinforcing layer 40 and the battery cell layer 30 near the panel 10 and the second encapsulating film layer 60 between the reinforcing layer 40 and the battery cell layer 30 near the backplate 20 is 0.6 mm.

[0092] In one embodiment, the panel 10 and back panel 20 are made of transparent CPC material, and the thickness of the panel 10 and back panel 20 is 0.3 mm. The first encapsulation film layer 50 is made of EVA material, and the thickness of the first encapsulation film layer 50 is 0.45 mm. The reinforcing layer 40 is made of glass fiber composite resin material, and the thickness of the reinforcing layer 40 is 0.3 mm. The proportion of glass fiber is 65%, and the composite resin is epoxy resin, and the proportion of composite resin is 35%. The second encapsulation film layer 60 is made of POE material, and the thickness of the second encapsulation film layer 60 is 0.55 mm. The battery cell layer 30 is preferably an XBC battery with no metal grid lines on the front side and both positive and negative metal electrodes led out from the back side. Twelve half battery cells 31 are connected in series, and three battery strings 32 are arranged in series. The power is between 100 W and 110 W.

[0093] In one embodiment, the photovoltaic module 100 has a thickness of less than 3 mm and a weight of less than 3.8 kg / m². 2 The photovoltaic module 100 can be designed with eyelets 70 on both sides for easy fixing, installation, and disassembly. According to the IEC 612125 standard, when tested with hailstones of 25mm diameter at an impact velocity of 23m / s, the power loss of the photovoltaic module 100 is less than 3%.

[0094] The photovoltaic system (not shown) according to the embodiments of this application includes multiple photovoltaic modules 100, which are electrically connected. Thus, the electrical connection of multiple photovoltaic modules 100 can increase the power generation capacity of the photovoltaic system.

[0095] 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 the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0096] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, wherein, include: panel; The back panel is stacked on top of the front panel; and A battery cell layer, wherein the battery cell layer is located between the panel and the back panel; A reinforcing layer is provided between the panel and the battery cell layer and / or between the back panel and the battery cell layer. The reinforcing layer is made of glass fiber composite resin material, and the proportion of glass fiber is 50% to 65%.

2. The photovoltaic module according to claim 1, wherein, The composite resin is either acrylic resin or epoxy resin, and the proportion of the composite resin is 35% to 50%.

3. The photovoltaic module according to claim 2, wherein, The thickness of the reinforcing layer is 0.3mm-0.45mm.

4. The photovoltaic module according to claim 2 or 3, wherein, The reinforcing layer is made of reinforced composite double-layer PET material.

5. The photovoltaic module according to claim 4, wherein, The thickness of the reinforcing layer is 0.45mm-0.65mm.

6. The photovoltaic module according to claim 4 or 5, wherein, The light transmittance of the reinforcement layer is greater than 85%.

7. The photovoltaic module according to any one of claims 1-6, wherein, The panel is a light-transmitting plate, which is one of PET board, CPC board and HPC board.

8. The photovoltaic module according to any one of claims 1-7, wherein, The back panel is a light-transmitting panel, which is one of PET board, CPC board and HPC board.

9. The photovoltaic module according to any one of claims 1-8, wherein, The thickness of the panel is 0.18mm-0.3mm.

10. The photovoltaic module according to any one of claims 1-9, wherein, The thickness of the back plate is 0.18mm-0.4mm.

11. The photovoltaic module according to any one of claims 1-10, wherein, The panel and / or the back panel are made of one of PVDF film, PVF film, or ETFE film.

12. The photovoltaic module according to claim 11, wherein, The thickness of the panel and / or the back panel is 0.25mm-0.45mm.

13. The photovoltaic module according to any one of claims 1-12, wherein, The battery cell layer includes multiple battery strings connected in series, each battery string includes multiple battery cells, and all the battery cells in each battery string are connected in series.

14. The photovoltaic module according to any one of claims 1-13, wherein, A first encapsulating film layer is provided between the panel and the reinforcing layer, and between the back plate and the reinforcing layer. The first encapsulating film layer bonds the panel and the reinforcing layer, and bonds the back plate and the reinforcing layer.

15. The photovoltaic module according to claim 14, wherein, The first encapsulating film layer is made of one of EVA, POE, or EPE materials.

16. The photovoltaic module according to claim 14 or 15, wherein, The thickness of the first encapsulating film layer is 0.3mm-0.7mm.

17. The photovoltaic module according to any one of claims 1-16, wherein, A second encapsulating film layer is disposed between the reinforcing layer and the battery cell layer, and the second encapsulating film layer bonds the reinforcing layer and the battery cell layer.

18. The photovoltaic module according to claim 17, wherein, The second encapsulating film layer is made of POE film material, and the thickness of the second encapsulating film layer is 0.4mm-0.7mm.

19. The photovoltaic module according to any one of claims 1-18, wherein, The photovoltaic module has a symmetrical structure in the thickness direction about the center of the cell layer.

20. A photovoltaic system, wherein, It includes a plurality of photovoltaic modules as described in any one of claims 1-19, wherein the plurality of photovoltaic modules are electrically connected.

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