Photovoltaic cell and photovoltaic module

Abstract

The utility model discloses a photovoltaic cell and a photovoltaic module, and belongs to the technical field of photovoltaics. The photovoltaic battery comprises a front plate, a plurality of battery pieces and a back plate, wherein the plurality of battery pieces are arranged at intervals and are positioned between the front plate and the back plate; wherein the front plate comprises a front plate base body and a front plate refraction area, the front plate refraction area is formed on the front plate base body and corresponds to a gap between two adjacent battery pieces, and the front plate refraction area is used for refracting light to the adjacent battery pieces. According to the technical scheme, the front plate refraction area is arranged at the position, corresponding to the gap, of the front plate, the incident light at the gap position of the battery pieces can be refracted in the front plate, the light is guided to move towards the adjacent battery pieces, and therefore the light capture efficiency of the photovoltaic battery is remarkably improved, and the overall photoelectric conversion efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of photovoltaics, and particularly relates to a photovoltaic cell and a photovoltaic module. BACKGROUND

[0002] When sunlight shines on the photovoltaic cell, part of the light will directly fall on the cell piece and be converted into electrical energy. However, due to the gaps between the cell pieces, another part of the light may pass through the gaps, resulting in a loss of light energy. In the related art, a reflective coating is usually added to the back plate layer to reflect the light for secondary use, thereby improving the power of the module. However, adding the reflective coating may affect the double-sided rate of the module, thereby affecting the power generation efficiency, and there is room for improvement. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve the technical problem of low light energy utilization rate in the related art. To this end, the present application provides a photovoltaic cell and a photovoltaic module, which can improve the light energy utilization rate of the photovoltaic cell by setting a refraction region.

[0004] In a first aspect, the present application provides a photovoltaic cell, comprising: a front plate, a plurality of cell pieces, and a back plate, the plurality of cell pieces being arranged at intervals and located between the front plate and the back plate; wherein,

[0005] The front plate comprises a front plate base body and a front plate refraction region, the front plate refraction region being formed in the front plate base body and being arranged correspondingly to the gap between adjacent two cell pieces, and the front plate refraction region is used for refracting light to the adjacent cell piece.

[0006] By setting the front plate refraction region at the position corresponding to the gap on the front plate, the incident light at the gap position between the cell pieces can be refracted in the front plate, and the light is guided to move to the adjacent cell piece, thereby significantly improving the light capture efficiency of the photovoltaic cell and further improving the overall photoelectric conversion efficiency.

[0007] According to an embodiment of the present application, the front plate refraction region is spaced apart from the surfaces of the front plate close to and away from the cell pieces.

[0008] The front plate refraction region is spaced apart from the surfaces of the front plate close to and away from the cell pieces, which can optimize the light capture efficiency and performance of the photovoltaic cell, thereby reducing the loss of light energy and increasing the power generation, and at the same time, the structural stability of the front plate can be enhanced, and the durability and service life of the photovoltaic cell can be improved.

[0009] According to an embodiment of the present application, the refractive index of the front plate base body is N1, satisfying: 1.4≤N1≤1.7.

[0010] According to one embodiment of the present application, the ratio of the refractive index of the front plate base body to the refractive index of the front plate refractive region is a, satisfying: 0.4≤a≤3.

[0011] The optimized light path and reduced light energy loss can significantly improve the power generation and stability of the photovoltaic cell.

[0012] According to one embodiment of the present application, the thickness of the front plate base body is h, satisfying: h≥0.3mm.

[0013] By arranging the front plate refractive region directly above the cell gap, it can be ensured that the light can be refracted along a predetermined path when passing through the front plate refractive region, thereby increasing the contact area of the light with the cell and improving the light capture efficiency. At the same time, the thickness of the front plate base body is appropriate, which can improve the overall performance of the photovoltaic cell, reduce light energy loss, and improve power generation and stability.

[0014] According to one embodiment of the present application, the ratio of the width of the front plate refractive region to the gap width between adjacent two cells is b, satisfying: 0.8≤b≤1.2.

[0015] The ratio of the width of the front plate refractive region to the gap width between adjacent two cells is between 0.8 and 1.2, which can optimize the light capture efficiency and performance of the photovoltaic cell and achieve the best refractive effect.

[0016] According to one embodiment of the present application, the back plate is a transparent plate, and the refractive index of the back plate is N2, satisfying: 1.4≤N2≤1.7.

[0017] The transparent back plate with uniform refractive index can significantly improve the performance and stability of the photovoltaic cell by reducing light scattering and improving light transmission, and can also protect the cell from external damage and prolong the service life of the photovoltaic cell.

[0018] According to one embodiment of the present application, the back plate includes a back plate base body and a back plate refractive region, the back plate refractive region is formed on the back plate base body and is arranged corresponding to the gap between adjacent two cells, and the back plate refractive region is used for refracting light to the adjacent cell.

[0019] The refractive effect of the back plate refractive region can guide the light that may have directly passed through the cell gap to the adjacent cell, thereby increasing the contact area of the light with the cell and improving the light capture efficiency.

[0020] According to one embodiment of the present application, the inner surface of the front plate base body is provided with a reflective layer in the region corresponding to the gap between adjacent two cells.

[0021] The inner surface of the front plate base is provided with the light-reflecting layer in the area corresponding to the gap between the battery pieces, which can reduce the loss of light energy and improve the power generation and efficiency of the photovoltaic cell through reflection, and the light-reflecting layer can also optimize the light path and enhance the stability of the photovoltaic cell.

[0022] According to an embodiment of the present application, the ratio of the width of the light-reflecting layer to the width of the gap between the adjacent two battery pieces is c, which satisfies: 0.8≤c≤1.1.

[0023] By adjusting the width of the light-reflecting layer, the light path can be optimized, and the light can be more evenly distributed on the battery pieces, thereby improving the utilization of light energy and the power generation efficiency of the photovoltaic cell.

[0024] According to an embodiment of the present application, the light-reflecting layer comprises a plurality of reflecting structures, and the included angle between the side surface of the reflecting structure and the plane is positively correlated with the distance from the reflecting structure to the adjacent battery piece.

[0025] As the distance from the microstructure on the light-reflecting layer to the adjacent battery piece increases, the included angle between the microstructure and the plane also increases correspondingly, so as to effectively reflect the light back to the battery piece,

[0026] In a second aspect, the present application provides a photovoltaic module, comprising:

[0027] A photovoltaic laminate, the photovoltaic laminate comprising the photovoltaic cell according to any one of the above.

[0028] A frame, the photovoltaic laminate is installed in the frame.

[0029] The photovoltaic laminate is firmly fixed in the frame, so as to form a complete and reliable photovoltaic module, which can meet the needs of various photovoltaic power generation systems.

[0030] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0032] Figure 1 is one of the structural schematic diagrams of the photovoltaic cell provided by the embodiments of the present application;

[0033] Figure 2 is a structural schematic diagram of the front plate of the photovoltaic cell provided by the embodiments of the present application;

[0034] Figure 3 FIG. 2 is a structural schematic diagram of a photovoltaic cell according to an embodiment of the present application;

[0035] Figure 4 FIG. 3 is a structural schematic diagram of a photovoltaic cell according to an embodiment of the present application;

[0036] Figure 5 FIG. 4 is a structural schematic diagram of a cell piece and a light reflection layer of a photovoltaic cell according to an embodiment of the present application.

[0037] Reference signs:

[0038] a photovoltaic cell 1;

[0039] a front plate 10, a front plate base 110, a front plate refraction region 120, glass fibers 130, and polyurethane fillers 140;

[0040] a cell piece 20;

[0041] a back plate 30, a back plate base 310, and a back plate refraction region 320;

[0042] a light reflection layer 40, a reflection structure 410, and an included angle a;

[0043] a width L1 of the front plate refraction region, a gap width L2 between adjacent two cell pieces, and a width L3 of the light reflection layer. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0045] The present application aims to at least solve the technical problem of low light energy utilization rate in the related art. To this end, the present application provides a photovoltaic cell and a photovoltaic module, which can improve the light energy utilization rate of the photovoltaic cell by setting a refraction region.

[0046] Reference is made below to Figures 1-5 A photovoltaic cell 1 according to an embodiment of the present application is described below.

[0047] As shown in Figure 1 FIG. 1, the photovoltaic cell 1 includes a front plate 10, a plurality of cell pieces 20, and a back plate 30, the plurality of cell pieces 20 being arranged at intervals and located between the front plate 10 and the back plate 30; wherein the front plate 10 includes a front plate base 110 and a front plate refraction region 120, the front plate refraction region 120 being formed on the front plate base 110 and arranged corresponding to a gap between adjacent two cell pieces 20, the front plate refraction region 120 being used to refract light to the adjacent cell piece 20.

[0048] The photovoltaic cell 1 is a device that generates electricity using sunlight, mainly composed of a front plate 10, a plurality of cell pieces 20, and a back plate 30, which work together to effectively capture sunlight and convert it into electrical energy. The front plate 10 is the outermost layer of the photovoltaic cell 1, usually made of glass or transparent polymer material, and its main function is to protect the internal cell pieces 20 from external environments such as moisture, dust, stains, etc., which can erode the cell pieces 20. At the same time, the front plate 10 also allows sunlight to pass through and shine on the cell pieces 20.

[0049] The cell pieces 20 are the core part of the photovoltaic cell 1, made of silicon or other semiconductor materials, which can convert light energy into electrical energy when sunlight shines on them. The cell pieces 20 are usually a plurality of single cells connected in series or parallel to increase output voltage or current.

[0050] The back plate 30 is located at the innermost layer of the photovoltaic cell 1, serving as a support and protection, usually made of materials with good weather resistance, such as aluminum plate, polymer material, etc., which can prevent external environments from eroding the internal structure and improve the durability of the photovoltaic cell 1.

[0051] In addition, the front plate 10 includes a front plate base 110 and a front plate refraction zone 120. The front plate base 110 is the main structural part of the front plate 10, which can provide sufficient strength and stability to support the front plate 10 and protect the cell pieces 20. The front plate refraction zone 120 is formed on the front plate base 110 and is used to optimize the path of light and increase the utilization rate of light.

[0052] The plurality of cell pieces 20 are arranged at intervals, and the position of the front plate refraction zone 120 corresponds to the gap between the cell pieces 20, i.e., there is a front plate refraction zone 120 between every two adjacent cell pieces 20. This can refract the light in the gap area between the two adjacent cell pieces 20 to the surface of the adjacent cell piece 20, thereby increasing the power generation.

[0053] The plurality of cell pieces 20 are located between the front plate 10 and the back plate 30, and the cell pieces 20 are provided with adhesive film between the front plate 10 and the back plate 30. The main function of the adhesive film is to tightly bond the components of the photovoltaic cell 1 together to form a whole structure. At the same time, the adhesive film can also play a sealing and moisture-proof role, reducing the entry of harmful substances such as moisture into the photovoltaic cell 1.

[0054] When the sunlight is irradiated on the photovoltaic cell 1, part of the light rays can directly fall on the cell pieces 20 and be converted into electric energy, but part of the light rays can pass through the gaps between the cell pieces 20, resulting in light energy loss. In the related art, a light-reflecting coating is usually added to the back plate layer to reflect the light rays for secondary use, thereby improving the power of the assembly, but the addition of the light-reflecting coating can affect the double-sided rate of the assembly, thereby affecting the power generation efficiency.

[0055] The front plate 10 is provided with the front plate refraction area 120 corresponding to the gaps, so that the light rays passing through the front plate refraction area 120 can be refracted to the cell pieces 20 at a specific angle, and the waste of light energy can be reduced, and the incident light on the back surface can be more utilized by the cell pieces 20 without the back plate 30.

[0056] According to the photovoltaic cell 1 provided by the embodiment of the present application, the incident light at the gap position between the cell pieces 20 can be refracted in the front plate 10 by providing the front plate refraction area 120 corresponding to the gaps on the front plate 10, and the light rays can be guided to move to the adjacent cell pieces 20, thereby significantly improving the light capture efficiency of the photovoltaic cell 1 and further improving the overall photoelectric conversion efficiency.

[0057] In some embodiments, as shown in Figure 1 The front plate refraction area 120 is spaced apart from the surface of the front plate 10 close to and away from the cell pieces 20.

[0058] The plurality of cell pieces 20 are spaced apart, and there are gaps between the cell pieces 20, part of the light rays can directly pass through the gaps and not be captured, and the front plate refraction area 120 can reduce such light energy loss, and the light rays that can miss the cell pieces 20 are guided to the adjacent cell pieces 20 through the refraction effect, thereby improving the light energy utilization rate.

[0059] The front plate refraction area 120 is spaced apart from the surface of the front plate 10 close to and away from the cell pieces 20, so that the light rays can be refracted along a predetermined path when passing through the front plate 10, thereby increasing the light capture efficiency of the cell pieces 20, and the spaced-apart design can also enhance the structural stability of the front plate 10.

[0060] In actual working process, the front plate 10 bears various pressures of external environment, such as wind pressure, snow pressure, etc., and the front plate refraction area 120 is spaced apart from the surface of the front plate 10 close to and away from the cell pieces 20, so as to protect the front plate refraction area 120 from the influence of the external environment, maintain the accuracy of the light refraction path, and also reduce the stress concentration of the front plate 10 and improve the durability of the photovoltaic cell 1.

[0061] As shown in Figure 1As shown, when sunlight is irradiated on the photovoltaic cell 1, the light at A can pass through the front plate 10, and the front plate refractive region 120 can refract the light when it passes through the front plate 10, thereby changing the propagation direction of the light. This refractive effect can guide the light to move towards the adjacent cell piece 20, increase the contact area of the light with the cell piece 20, and meanwhile, the front plate refractive region 120 is spaced apart from the surface of the front plate 10 close to and away from the cell piece 20, which can ensure that the light will not be hindered or lost too much during the refraction process.

[0062] It can be understood that the front plate refractive region 120 is spaced apart from the surface of the front plate 10 close to and away from the cell piece 20, which can optimize the light capture efficiency and performance of the photovoltaic cell 1, thereby reducing the loss of light energy and increasing the power generation, and at the same time, it can also enhance the structural stability of the front plate 10 and improve the durability and service life of the photovoltaic cell 1.

[0063] In some embodiments, as shown in Figure 1 The refractive index of the front plate base body 110 is N1, which satisfies: 1.4≤N1≤1.7, and the ratio of the refractive index of the front plate base body 110 to the front plate refractive region 120 is a, which satisfies: 0.4≤a≤3.

[0064] The refractive index is an important parameter of optical materials, which mainly describes the change of the speed of light in the material, and then determines the refraction angle of the light. The front plate base body 110 is the main structural part of the front plate 10 of the photovoltaic cell 1, and is usually selected from materials with high light transmittance, high strength and good stability, such as acrylic, PET or super white glass, etc. The refractive index of these materials is generally stable and fluctuates within a certain range, i.e. the refractive index N1 of the front plate base body 110 satisfies: 1.4≤N1≤1.7.

[0065] The front plate refractive region 120 is mainly used to optimize the light path and improve the light capture efficiency. The front plate refractive region 120 is usually made of materials with a specific refractive index, which is different from the refractive index of the front plate base body 110, so as to guide the light to refract along the predetermined path. Appropriate refractive index difference can refract the light when it passes through the front plate 10, thereby changing the propagation direction of the light and guiding the light to move towards the adjacent cell piece 20, thereby improving the utilization rate of light energy.

[0066] The ratio a of the refractive index of the front plate base 110 and the front plate refractive region 120 satisfies: 0.4≤a≤3, that is, this range can ensure that the light is moderately refracted when passing through the front plate 10, thereby improving the performance of the photovoltaic cell 1. When the refractive index ratio is moderate, the light can more smoothly enter the front plate refractive region 120 from the front plate base 110 and be effectively guided onto the cell sheet 20, which helps to improve the light capture efficiency and increase the power generation of the photovoltaic assembly. When the refractive index ratio is too large or too small, it may cause the light to be severely reflected or refracted on the surface of the front plate 10, thereby reducing the light capture efficiency.

[0067] It can be understood that the optimized light path and reduced light energy loss can significantly improve the power generation and stability of the photovoltaic cell 1.

[0068] In some embodiments, as shown in FIG. 1, the front plate refractive region 120 is located above the gaps between the plurality of cell sheets 20, and the thickness of the front plate base 110 is h, which satisfies: h≥0.3mm. Figure 1

[0069] There are gaps between adjacent cell sheets 20, and part of the light may pass through these gaps without being captured. By arranging the front plate refractive region 120 above the gaps between the cell sheets 20, the propagation direction of the light can be changed, and the light can be guided to pass through the refractive region and be refracted onto the adjacent cell sheet 20, thereby reducing the light energy loss. The optimized light path and reduced light energy loss can significantly improve the power generation and stability of the photovoltaic cell 1, and help to improve the overall performance of the photovoltaic cell 1.

[0070] The front plate base 110 is the main structural part of the photovoltaic cell 1 and has a certain strength and stability to withstand various pressures from the external environment. The thickness of 0.3mm is the minimum thickness to ensure that the front plate base 110 has sufficient strength and stability in most cases.

[0071] In addition, the thickness of the front plate base 110 has an effect on the strength of the front plate base 110 and the light transmittance of the front plate base 110. A too thick front plate base 110 may reduce the light transmittance, thereby affecting the power generation efficiency of the photovoltaic cell 1. A thickness of 0.3mm can ensure good light transmittance while ensuring strength.

[0072] It can be understood that by arranging the front plate refractive region 120 above the gaps between the cell sheets 20, the light can be refracted according to the predetermined path when passing through the refractive region, thereby increasing the contact area of the light with the cell sheet 20 and improving the light capture efficiency. At the same time, the thickness of the front plate base 110 is appropriate, which can improve the overall performance of the photovoltaic cell 1, reduce the light energy loss, and improve the power generation and stability.

[0073] In some embodiments, as shown in FIG. 1, the front plate refractive region 120 is located above the gaps between the plurality of cell sheets 20, and the thickness of the front plate base 110 is h, which satisfies: h≥0.3mm. Figure 1 ​As shown, the ratio of the width L1 of the front plate refractive region 120 to the gap width L2 between the adjacent two cell pieces 20 is b, which satisfies: 0.8≤b≤1.2.

[0074] The front plate refractive region 120 is mainly used to optimize the light capture efficiency and performance of the photovoltaic cell 1. By matching the width L1 of the front plate refractive region 120 with the gap width L2 between the adjacent two cell pieces 20, it can be ensured that the light can be more effectively refracted to the adjacent cell piece 20 when passing through the front plate 10, thereby reducing the loss of light energy and increasing the power generation.

[0075] When the ratio b of the width L1 of the front plate refractive region 120 to the gap width L2 between the adjacent two cell pieces 20 satisfies: 0.8≤b≤1.2, it is helpful for the light to be properly refracted when passing through the refractive region, thereby changing the propagation direction of the light and guiding it to move to the adjacent cell piece 20, that is, this ratio range helps to achieve the best refraction effect and improve the light capture efficiency. In addition, different types of cell pieces 20 have different absorption and conversion efficiencies of light, and the width L1 of the front plate refractive region 120 can be selected according to the type and performance of the cell piece 20.

[0076] It can be understood that the ratio of the width L1 of the front plate refractive region 120 to the gap width L2 between the adjacent two cell pieces 20 is between 0.8 and 1.2, which can optimize the light capture efficiency and performance of the photovoltaic cell 1 and achieve the best refraction effect.

[0077] In some embodiments, as shown, the material of the front plate 10 can be glass, resin, PET, or other high molecular materials or combinations thereof, and the front plate 10 has various structural forms, including but not limited to: Figure 2

[0078] Example one, the front plate refractive region 120 and the front plate base body 110 are the same material.

[0079] For example, the front plate 10 is composed of glass fiber 130 and polyurethane filler 140, and the content of glass fiber 130 in the front plate refractive region 120 is higher than that in the front plate base body 110, so that the different refractive indexes of the front plate refractive region 120 and the front plate base body 110 can be achieved.

[0080] Example two, the front plate refractive region 120 and the front plate base body 110 are different materials.

[0081] For example, the materials of the front plate refractive region 120 and the front plate base body 110 can be at least two of glass, resin, PET, or other high molecular materials or combinations thereof, so that the different refractive indexes of the front plate refractive region 120 and the front plate base body 110 can be achieved.

[0082] The embodiments of the present application will be described in detail from three different implementation angles respectively.​

[0083] Example 1: In some embodiments, Figure 1 As shown, the back plate 30 is a transparent plate with a uniform refractive index, and the refractive index of the back plate 30 is N2, which satisfies: 1.4≤N2≤1.7.

[0084] In this embodiment, the utilization rate of light energy is mainly improved by front refraction. When sunlight shines on the photovoltaic cell 1, the light at point A will pass through the front panel 10. The front panel refraction area 120 can refract the light when passing through the front panel 10, thereby guiding the light to the surface of the battery cell 20 to be absorbed and generate electricity. At the same time, the light passing through point B of the back panel 30 can be more utilized by the battery cell 20.

[0085] The back plate 30 with a uniform refractive index can reduce the scattering of light inside the back plate 30. When light passes through the back plate 30, the light may be scattered multiple times inside the back plate 30 with an uneven refractive index, resulting in light energy loss. The back plate 30 with a uniform refractive index can allow the light to pass through in a more consistent manner, reducing scattering and light energy loss.

[0086] The transparent backplane 30 is usually made of a material with high light transmittance, high durability and good stability. Common materials include glass, transparent polymers and inorganic films. The refractive index N2 of the backplane 30 satisfies: 1.4≤N2≤1.7. The transparent backplane 30 with a uniform refractive index helps light maintain a high light transmittance when passing through, allowing more light to penetrate the backplane 30 and be captured by the battery cell 20, thereby converting it into electrical energy.

[0087] It is understandable that the transparent backplane 30 with uniform refractive index can significantly improve the performance and stability of the photovoltaic cell 1 by reducing light scattering and improving light transmittance, while also protecting the cell 20 from damage by the external environment and extending the service life of the photovoltaic cell 1.

[0088] Example 2: In some embodiments, Figure 3 As shown, the backplane 30 includes a backplane substrate 310 and a backplane refractive area 320 . The backplane refractive area 320 is formed on the backplane substrate 310 and is arranged corresponding to the gap between two adjacent battery cells 20 . The backplane refractive area 320 is used to refract light to the adjacent battery cells 20 .

[0089] In this embodiment, the back plate 30 can be arranged in the same way as the front plate 10, mainly through the cooperation of front refraction and back refraction to improve the utilization rate of light energy. When sunlight is incident on the photovoltaic cell 1, the light at position A can pass through the front plate 10, and the light at position B can pass through the back plate 30. The front plate refraction area 120 and the back plate refraction area 320 can refract the light when it passes through, so as to guide the light to the surface of the cell 20 to be absorbed to generate electricity. In addition, the light refracted by the back plate 30 and the front plate 10 respectively reaches the oppositely arranged two sides of the cell 20.

[0090] As a main structural part of the back plate 30, the back plate base 310 is usually made of a material with high light transmittance, high strength and good stability. The main function of the back plate base 310 is to support and protect the cell 20, reduce the damage of the external environment, and at the same time, the back plate base 310 can also make the light pass through smoothly, so as to be captured by the cell 20 and converted into electrical energy.

[0091] It can be understood that the refraction of the back plate refraction area 320 can guide the light that can originally directly pass through the gap between the cells 20 to the adjacent cell 20, so as to increase the contact area of the light and the cell 20 and improve the light capture efficiency.

[0092] Example three, in some embodiments, as shown in Figure 4 and Figure 5 the inner surface of the front plate base 110 is provided with a light reflection layer 40 in the area corresponding to the gap between the cell 20, and the back plate 30 is a transparent plate with uniform refractive index.

[0093] The ratio of the width L3 of the light reflection layer 40 to the gap width L2 between the adjacent two cells 20 is c, which satisfies: 0.8≤c≤1.1. The light reflection layer 40 includes a plurality of reflection structures 410, and the included angle α between the side surface of the reflection structure 410 and the plane is positively correlated with the distance from the reflection structure 410 to the adjacent cell 20.

[0094] In this embodiment, the light reflection layer 40 is provided with reflection structures 410 away from the front plate 10. The plurality of reflection structures 410 are sequentially distributed along the length direction of the light reflection layer 40, and the plurality of reflection structures 410 are in contact with each other. The cross-sectional shape of the reflection structure 410 is triangular, and the reflection structure 410 is coated with a light reflection coating to reflect the light at position B passing through the back plate 30 to the front surface of the cell 20, thereby increasing the utilization rate of light. The included angle α between the side surface of the reflection structure 410 provided on the light reflection layer 40 and the plane gradually increases along the length direction of the front plate 10 from the end of the light reflection layer 40 to the center of the light reflection layer 40, so as to reflect the light to the surface of the cell 20 and increase the utilization rate of the back light.

[0095] The main function of the light reflection layer 40 is to reflect the light that would otherwise be lost through the gap between the battery pieces 20 back onto the battery pieces 20, thereby improving light capture efficiency and reducing light energy loss. The light reflection layer 40 is usually made of a material with high reflectivity, such as white high-reflectivity material, white backboard, white adhesive film, or light-reflecting film, etc. When light shines on the light reflection layer 40, most of the light will be reflected back onto the battery pieces 20 instead of being lost directly through the gap between the battery pieces 20.

[0096] The ratio c of the width L3 of the light reflection layer 40 to the gap width L2 between the adjacent two battery pieces 20 satisfies: 0.8≤c≤1.1, which helps the light reflection layer 40 to reflect light back onto the battery pieces 20 while reducing unnecessary shading of the battery pieces 20.

[0097] When the light reflection layer 40 is too wide, it may shade part of the battery pieces 20, resulting in light energy loss. When the light reflection layer 40 is too narrow, it may not completely cover the gap, affecting the reflection effect. By adjusting the width of the light reflection layer 40, the light path can be optimized, and the light can be more evenly distributed on the battery pieces 20, thereby improving the utilization of light energy and the power generation efficiency of the photovoltaic cell 1.

[0098] The angle a between the side surface of the reflection structure 410 in the light reflection layer 40 and the plane is positively related to the distance of the reflection structure 410 to the adjacent battery piece 20, which can enable the light to pass through the light reflection layer 40 and be reflected back onto the battery pieces 20 when passing through the front plate 10, thereby improving the utilization of light energy and increasing the power generation of the photovoltaic cell 1.

[0099] As the distance of a certain reflection structure 410 on the light reflection layer 40 to the adjacent battery piece 20 increases, the angle a between the side surface of the reflection structure 410 and the plane also increases correspondingly, so as to effectively reflect the light back onto the battery pieces 20. The increase of the angle a helps to increase the contact area of the light and the battery pieces 20, thereby improving the light energy capture efficiency. If the angle a is too small, part of the light may not be captured by the battery pieces 20 and be lost.

[0100] It can be understood that the inner surface of the front plate base body 110 is provided with the light reflection layer 40 in the region corresponding to the gap between the battery pieces 20, which can reduce light energy loss and improve the power generation and efficiency of the photovoltaic cell 1 through reflection. At the same time, the light reflection layer 40 can also optimize the light path and enhance the stability of the photovoltaic cell 1.

[0101] The embodiment of the present application also provides a photovoltaic module, which comprises a photovoltaic laminate and a frame.

[0102] The photovoltaic laminate comprises the photovoltaic cell 1, and the photovoltaic laminate is installed on the frame.

[0103] The photovoltaic laminate is the core part of the photovoltaic module, which is usually formed by laminating photovoltaic cells 1 and packaging materials, etc., and is responsible for converting light energy into electrical energy. These materials can form a whole structure after special lamination process, which not only has excellent power generation performance, but also has good weather resistance and mechanical strength, and can work stably in various harsh environments for a long time.

[0104] The frame is a support and protection structure of the photovoltaic module, which is usually made of metal materials such as aluminum alloy, stainless steel or composite materials, and can enhance the overall structural strength of the photovoltaic module and improve its compression resistance. The installation between the photovoltaic laminate and the frame usually adopts various ways such as gluing and buckle connection, so that the photovoltaic laminate and the frame are tightly fitted and stably connected during the installation process, so as to reduce the loosening or falling phenomenon in the subsequent use process.

[0105] It can be understood that the photovoltaic laminate is stably fixed in the frame to form a complete and reliable photovoltaic module, which can meet the needs of various photovoltaic power generation systems.

[0106] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0107] In the description of the present application, 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0108] In the description of the present application, "first feature" and "second feature" can include one or more features.

[0109] In the description of the present application, the meaning of "a plurality of" is two or more.

[0110] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0111] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0112] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0113] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic cell, characterized in that: include: A front plate, a plurality of battery cells and a back plate, wherein the plurality of battery cells are spaced apart and located between the front plate and the back plate; wherein, The front panel includes a front panel substrate and a front panel refractive area. The front panel refractive area is formed on the front panel substrate and is arranged corresponding to the gap between two adjacent battery cells. The front panel refractive area is used to refract light to the adjacent battery cells. The backplane includes a backplane substrate and a backplane refractive area. The backplane refractive area is formed on the backplane substrate and is arranged corresponding to the gap between two adjacent battery cells. The backplane refractive area is used to refract light to the adjacent battery cells.

2. The photovoltaic cell according to claim 1, characterized in that The front plate refractive area is spaced apart from the surface of the front plate close to and away from the battery cell.

3. The photovoltaic cell according to claim 1, characterized in that The refractive index of the front plate substrate is N1, which satisfies the following: 1.4≤N1≤1.

7.

4. The photovoltaic cell according to claim 1, characterized in that The ratio of the refractive index of the front plate substrate to the refractive index of the front plate is a, which satisfies: 0.4≤a≤3.

5. The photovoltaic cell according to claim 1, characterized in that The thickness of the front plate substrate is h, which satisfies: h≥0.3 mm.

6. The photovoltaic cell according to claim 1, characterized in that The ratio of the width of the refractive area of ​​the front plate to the width of the gap between two adjacent battery cells is b, which satisfies the following: 0.8≤b≤1.

2.

7. The photovoltaic cell according to any one of claims 1 to 6, characterized in that The back plate is a transparent plate, and the refractive index of the back plate is N2, which satisfies: 1.4≤N2≤1.

7.

8. The photovoltaic cell according to any one of claims 1 to 6, characterized in that: A reflective layer is provided on the inner surface of the front panel substrate in an area corresponding to the gap between two adjacent battery cells.

9. The photovoltaic cell according to claim 8, characterized in that The ratio of the width of the reflective layer to the width of the gap between two adjacent solar cells is c, which satisfies the following: 0.8≤c≤1.

1.

10. The photovoltaic cell according to claim 8, characterized in that The reflective layer includes a plurality of reflective structures, and the angle α formed by the side surface of the reflective structure and the plane is positively correlated with the distance from the reflective structure to the adjacent solar cell.

11. A photovoltaic module, characterized in that: include: A photovoltaic laminate comprising a photovoltaic cell according to any one of claims 1 to 10; A frame, the photovoltaic laminate is mounted on the frame.

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