CN117438490A - Photovoltaic module and preparation method thereof - Google Patents

Photovoltaic module and preparation method thereof Download PDF

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Publication number
CN117438490A
CN117438490A CN202311397328.7A CN202311397328A CN117438490A CN 117438490 A CN117438490 A CN 117438490A CN 202311397328 A CN202311397328 A CN 202311397328A CN 117438490 A CN117438490 A CN 117438490A
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China
Prior art keywords
light
area
photovoltaic module
gap
adhesive layer
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Chinese (zh)
Inventor
宋朋泽
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Yingkou Yihong Management Consulting Co ltd
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Yingkou Yihong Management Consulting Co ltd
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Priority to CN202311397328.7A priority Critical patent/CN117438490A/en
Publication of CN117438490A publication Critical patent/CN117438490A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/056—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means the light-reflecting means being of the back surface reflector [BSR] type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Photovoltaic Devices (AREA)

Abstract

A photovoltaic module and a preparation method thereof belong to the technical field of photovoltaics. The photovoltaic module comprises a first module, wherein the first module comprises a light-transmitting glass layer, a front adhesive layer, a battery piece group, a back adhesive layer, a light-transmitting backboard and a reflecting plate which are sequentially arranged along the thickness direction; the battery piece group comprises a plurality of battery pieces, each battery piece is flatly paved between the front adhesive layer and the back adhesive layer, a gap is formed between two adjacent battery pieces, the front adhesive layer is provided with a first area right opposite to the gap and a second area outside the first area, and the light transmittance of the first area is larger than that of the second area; the back adhesive layer is provided with a third area and a fourth area which are right corresponding to the gap, and the light transmittance of the third area is larger than that of the fourth area; the reflector is opposite to the gap.

Description

Photovoltaic module and preparation method thereof
Technical Field
The application relates to the technical field of photovoltaics, in particular to a photovoltaic module and a preparation method thereof.
Background
The technology of solar photovoltaic modules in China is improved year by year, and photovoltaic modules with double-sided power generation and energy supply are developed in recent years, so that the purpose of improving the utilization rate and the conversion rate of solar energy on the basis of photovoltaic panels with the same area is achieved. The front and back sides of the photovoltaic module can receive the irradiation of sunlight to generate electricity, so that the utilization rate of solar energy can be improved and the output power of the photovoltaic module can be improved under the condition that the occupied areas are the same.
At present, the existing double-sided photovoltaic module has some technical problems in use, and mainly focuses on the aspects of solar energy utilization rate and conversion rate. The front side of the existing double-sided photovoltaic module can directly receive sunlight, the back side can only absorb some scattered light, the proportion of the output power of the double-sided photovoltaic module, which is increased compared with that of the single-sided photovoltaic module, is not high, and the factors lead to the formation of restriction on the large-scale popularization and application of the double-sided photovoltaic module.
Disclosure of Invention
Based on the above-mentioned shortcomings, the present application provides a photovoltaic module and a method for manufacturing the same, so as to partially or fully improve the problems in the related art.
The application is realized in such a way that:
in a first aspect, examples of the present application provide a photovoltaic module, including a first module including a light-transmitting glass layer, a front adhesive layer, a battery sheet group, a back adhesive layer, a light-transmitting back sheet, and a light-reflecting plate, which are sequentially disposed in a thickness direction; the battery piece group comprises a plurality of battery pieces, each battery piece is flatly paved between the front adhesive layer and the back adhesive layer, a gap is formed between two adjacent battery pieces, the front adhesive layer is provided with a first area opposite to the gap and a second area outside the first area, and the light transmittance of the first area is larger than that of the second area; the back adhesive layer is provided with a third area and a fourth area which are right corresponding to the gap, and the light transmittance of the third area is larger than that of the fourth area; the reflector is opposite to the gap.
In the implementation process, the battery pieces in the battery piece group are arranged at intervals, so that a gap is formed between two adjacent battery pieces, the light transmittance of the front adhesive layer corresponding to the first area of the gap is larger than that of the second area outside the first area, the light transmittance of the back adhesive layer corresponding to the third area of the gap is larger than that of the fourth area outside the third area, and therefore solar light can be emitted into the gap from the first area with better light transmittance and emitted from the fourth area. Because the reflector plate opposite to the gap is arranged below the light-transmitting backboard, light emitted from the gap can be reflected when irradiated to the reflector plate, and then irradiated to the lower surface of the battery piece group, so that the light receiving rate of the lower surface is improved. In the photovoltaic module provided by the application example, the front surface and the back surface of the battery piece group can both receive sunlight, and the output efficiency of the photovoltaic module can be improved.
With reference to the first aspect, in an optional embodiment of the present application, the first area and/or the third area are hollow structures.
In the implementation process, one or both of the first area and the third area are in a hollow structure, so that the light transmittance of a gap can be further improved, the light receiving rate of the reflecting plate is improved, the light receiving rate of the lower surface of the battery piece set is further improved, and the output efficiency of the photovoltaic module is improved.
With reference to the first aspect, in an alternative embodiment of the present application, the orthographic projection of the first region and/or the third region in the thickness direction overlaps with an edge of the battery sheet.
In the implementation process, the orthographic projection of the first area and/or the third area along the thickness direction is overlapped with the edge of the battery piece, so that the light receiving rate of the upper surface and the lower surface of the battery piece can be improved and the output efficiency of the photovoltaic module can be improved on the premise of ensuring the structural stability between the battery piece group, the light-transmitting glass layer and the light-transmitting backboard.
With reference to the first aspect, in an optional embodiment of the present application, the light reflecting plate is an arc structure, and a convex surface of the arc structure is opposite to the light-transmitting backboard.
In the implementation process, the reflecting plate is arranged to be of an arc-shaped structure, the convex surface of the arc-shaped structure is opposite to the light-transmitting backboard, sunlight emitted from the gap can be reflected by the reflecting plate, scattered light on the back of the photovoltaic module can be reflected, the light receiving rate of the lower surface of the battery piece group is further improved, and the output efficiency of the photovoltaic module is improved.
With reference to the first aspect, in an alternative embodiment of the present application, the light-transmitting back plate is selected from one of a PVDF light-transmitting plate, a PTFE light-transmitting plate film, or a PVF light-transmitting plate.
In the implementation process, the PVDF light-transmitting plate, the PTFE light-transmitting plate film material or the PVF light-transmitting plate and other light-transmitting back plates can support and protect the battery piece group, have good light transmittance, and can improve the light receiving rate of the lower surface of the battery piece group and the output efficiency of the photovoltaic module.
With reference to the first aspect, in an alternative embodiment of the present application, at least part of the gap satisfies: the size of the minimum gap between two adjacent battery pieces is larger than the width of the battery pieces in the direction of the minimum gap. In the implementation process, at least part of gaps in the photovoltaic module satisfy the following conditions: the size of the minimum gap between two adjacent battery pieces is larger than the width of the battery piece in the minimum gap direction, so that the probability that solar rays of the battery penetrate through the gap and irradiate to the reflecting plate can be increased, and the light receiving rate of the back face of the battery piece group is improved.
With reference to the first aspect, in an alternative embodiment of the present application, the photovoltaic module includes a plurality of groups of first modules, where the plurality of groups of first modules are sequentially arranged along a thickness direction; the reflector is a reflective glass plate, and the light-transmitting glass layer of the lower group of first components is close to the reflector of the upper group of first components.
In the above implementation process, the photovoltaic module includes a plurality of groups of first modules, the plurality of groups of first modules are sequentially arranged along the thickness direction, and the light-transmitting glass layer of the lower group of first modules is adjacent to the light-reflecting plate of the upper group of first modules, so that when sunlight emitted from the gap of the upper group of first modules irradiates onto the light-reflecting glass plate, a part of light rays can be reflected, irradiates onto the lower surface of the battery piece group of the upper group of first modules, and another part of light rays can be refracted and emitted to the next group of first modules.
With reference to the first aspect, in an optional embodiment of the present application, the light reflecting plate is provided with a hollowed-out portion, and the light that is used for enabling the gap of the previous group of photovoltaic modules to pass through passes through the hollowed-out portion.
In the implementation process, the reflector is provided with the hollowed-out part, so that the probability that light passes through the reflector and irradiates the surface of the group of photovoltaic modules below can be increased.
In a second aspect, examples of the present application provide a method of manufacturing a photovoltaic module, comprising:
the upper surface of the light-transmitting backboard is provided with first adhesives which are arranged at intervals; arranging a plurality of battery pieces on the first adhesive at intervals, and forming a series or parallel circuit by ohmic connection of the plurality of battery pieces to form a battery piece group; arranging second adhesives on the lower surface of the light-transmitting glass layer at intervals, and laminating the light-transmitting glass layer provided with the second adhesives above the battery piece group to form a first prefabricated member; heating and pressurizing the first prefabricated member to enable the first adhesive to be solidified to form a front adhesive layer, and enabling the second adhesive to be solidified to form a back adhesive layer, so as to obtain a second prefabricated member; the second prefabricated member is fixed above the reflecting plate, so that the gap is opposite to the reflecting plate.
In the implementation process, the application example provides a preparation method of a photovoltaic module, wherein first adhesives are arranged on the upper surface of a light-transmitting backboard at intervals so as to facilitate arranging a plurality of battery pieces on the first adhesives at intervals to form a gap. Ohmic connection of a plurality of battery pieces to form a series or parallel circuit to form a battery piece group, and then arranging second adhesives at intervals on the lower surface of the light-transmitting glass layer so as to facilitate laminating the light-transmitting glass layer provided with the second adhesives above the battery piece group and avoid the second adhesives from shielding gaps; and then heating and pressurizing the first prefabricated member to enable the first adhesive to be solidified to form a front adhesive layer, enabling the second adhesive to be solidified to form a back adhesive layer, enabling the front face of the battery piece group to be fixed on the transparent glass layer through the front adhesive layer, and enabling the back face of the battery piece group to be fixed on the transparent backboard through the back adhesive layer. And finally, fixing the second prefabricated member above the reflecting plate to enable the gap to be opposite to the reflecting plate, and obtaining the photovoltaic module.
With reference to the second aspect, in an alternative embodiment of the present application, the first adhesive and/or the second adhesive is selected from EVA.
In the implementation process, EVA has certain light transmittance and adhesiveness, so that the first component is stable in structure and has good conveying efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic structural view of a prior art photovoltaic module;
FIG. 2 is a schematic cross-sectional view of a photovoltaic module provided by examples of the present application;
fig. 3 is a schematic view of a first arrangement of a battery stack according to an example of the present application;
fig. 4 is a schematic diagram of a second arrangement of a battery stack according to an example of the present application;
fig. 5 is a schematic cross-sectional view of a second photovoltaic module provided by examples of the present application.
Icon:
1-prior art photovoltaic modules; 10-solar cell pieces; 11-EVA packaging adhesive film; 12-glass layer; 13-a back plate;
2-a photovoltaic module; 20-a first component; 21-a light-transmitting glass layer; 22-a front adhesive layer; 221-a first region; 222-a second region; 23-cell stack; 231-cell pieces; 232-gap; 24-a back adhesive layer; 241-a third region; 242-fourth region; 25-a light-transmitting back plate; 26-a reflector; d1-thickness direction.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the present application and in the description of the drawings above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "middle", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "bottom", "inner", etc. are based on the orientation or positional relationship shown in the drawings, merely for convenience of describing the embodiments of the present application and simplifying the description, and are not indicative or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In order to improve the utilization rate and conversion rate of solar energy, the solar photovoltaic module technology in China is improved year by year, and a photovoltaic module with double-sided power generation and energy supply is developed in recent years. Both the front and the back surfaces of the photovoltaic module can receive the irradiation of sunlight to generate electricity.
However, in the prior art photovoltaic module 1, referring to fig. 1, the prior art photovoltaic module 1 includes a plurality of solar cells 10 arranged adjacently, wherein the upper and lower surfaces of the solar cells 10 are provided with a layer of EVA packaging film 11, the surface of the upper EVA packaging film 11 far away from the solar cells 10 is provided with a glass layer 12, and the surface of the lower EVA packaging film 11 far away from the solar cells 10 is provided with a back plate 13 and a frame.
With continued reference to fig. 1, in the photovoltaic module 1 of the prior art, there is little space between two solar cells 10 along the length direction, and there is little space between two solar cells 10 along the width direction, and similar type gaps are formed between four adjacent solar cells 10 due to the chamfering structure of the edges of the solar cells 10. And, the upper and lower EVA packaging films 11 cover the solar cell 10 and the gaps thereof.
The upper surface of the prior art photovoltaic module 1 can directly receive solar illumination, while the lower surface can only absorb some scattered light, resulting in lower output efficiency.
Based on this, the present application example provides a photovoltaic module 2 and a method of manufacturing the same to improve the output efficiency of the photovoltaic module 2.
Referring to fig. 2, the photovoltaic module 2 includes a first module 20, and the first module 20 includes a transparent glass layer 21, a front adhesive layer 22, a battery pack 23, a back adhesive layer 24, a transparent back plate 25, and a reflective plate 26 sequentially disposed along a thickness direction D1.
The battery piece group 23 includes a plurality of battery pieces 231, each battery piece 231 is flatly laid between the front adhesive layer 22 and the back adhesive layer 24, a gap 232 is formed between two adjacent battery pieces 231, the front adhesive layer 22 has a first area 221 opposite to the gap 232 and a second area 222 outside the first area 221, and the light transmittance of the first area 221 is greater than that of the second area 222; the back adhesive layer 24 has a third region 241 corresponding to the gap 232 and a fourth region 242 outside the third region 241, and the light transmittance of the third region 241 is greater than that of the fourth region 242. The reflector 26 is opposite the gap 232.
The cells 231 in the cell stack 23 are arranged at intervals, so that a gap 232 is formed between two adjacent cells 231, the light transmittance of the front adhesive layer 22 corresponding to the first region 221 of the gap 232 is greater than the light transmittance of the second region 222 except the first region 221, the light transmittance of the back adhesive layer 24 corresponding to the third region 241 of the gap 232 is greater than the fourth region 242 except the third region 241, and solar light can be emitted into the gap 232 from the first region 221 with better light transmittance and emitted from the fourth region 242. Since the light reflecting plate 26 opposite to the gap 232 is disposed below the light transmitting back plate 25, the light emitted from the gap 232 can be reflected when being irradiated to the light reflecting plate 26, and further irradiated to the lower surface of the battery pack 23, thereby improving the light receiving rate of the lower surface.
In the photovoltaic module 2 provided in this application example, the front and the back of the battery sheet group 23 can both receive solar energy, and the output efficiency of the photovoltaic module 2 can be improved.
The photovoltaic module 2 of the present application is described in further detail below with reference to the accompanying drawings.
The light-transmitting glass layer 21 is used for packaging the battery piece group 23 and protecting the battery piece group 23, and the light-transmitting glass layer 21 has good light transmittance so that sunlight can irradiate to the battery piece group 23 through the light-transmitting glass layer 21.
Illustratively, in order to enhance the light transmittance of the light-transmitting glass layer 21, it may be selected from ultrawhite glass.
In order to further improve the light transmittance of the light-transmitting glass layer 21, in one possible embodiment, an antireflection film may be disposed on the surface of the light-transmitting glass layer 21, so as to reduce the reflectivity of the surface of the light-transmitting glass layer 21, improve the transmittance, and further improve the light transmittance.
The particular type of light-transmitting glass layer 21 is not limited by this application, and the relevant personnel may make corresponding selections as desired.
Illustratively, the light-transmitting glass layer 21 may be selected from tempered low-iron glass, which has very good light transmission and high hardness, and can accommodate a large diurnal temperature difference and severe weather conditions, thereby protecting the battery cell stack 23.
The front adhesive layer 22 is used for realizing the relative fixation between the battery piece group 23 and the light-transmitting glass layer 21, and the front adhesive layer 22 has certain light transmittance, so that sunlight transmitted through the light-transmitting glass layer 21 can irradiate to the battery piece group 23 through the front adhesive layer 22.
In the photovoltaic module 2 provided in this example, the front adhesive layer 22 has a first region 221 corresponding to the gap 232 and a second region 222 outside the first region 221, and the light transmittance of the first region 221 is greater than that of the second region 222 outside the first region 221, so that sunlight irradiates the cell stack 23 through the first region 221, and the irradiation rate of sunlight at the gap 232 is increased.
The specific material of the front adhesive layer 22 is not limited in this application, and in one possible embodiment, the front adhesive layer 22 may be an EVA adhesive layer.
The present application is not limited to how the light transmittance of the first region 221 is greater than the light transmittance of the second region 222 outside the first region 221, and in a possible embodiment, please continue to refer to fig. 2, the first region 221 may be configured as a hollowed-out structure.
The first region 221 of the front adhesive layer 22 is a hollow structure, and solar rays can directly irradiate the battery pack 23 through the hollow region. The second region 222 other than the first region 221 may adhere the battery cells 231 in the battery cell group 23 to the lower surface of the light-transmitting glass layer 21.
Further, in order to further improve the light receiving efficiency of the battery cell group 23, in one possible embodiment, the orthographic projection of the first region 221 along the thickness direction D1 overlaps with the edge of the battery cell 231.
Alternatively, in another possible embodiment, the first region 221 of the front adhesive layer 22 is made of a first material, and the second region 222 is made of a second material, and the light transmittance of the first material is higher than that of the second material.
Illustratively, the material of the second region 222 is EVA adhesive, and the material of the first region 221 is light-transmitting glass.
Alternatively, in another possible embodiment, in the front adhesive layer 22, the thickness of the first region 221 is smaller than the thickness of the second region 222, so that the light transmittance of the first region 221 is greater than the light transmittance of the second region 222.
By way of example, the first region 221 may have a thickness of 0.5mm and the second region 222 may have a thickness of 0.2mm.
The back adhesive layer 24 has the same function as the front adhesive layer 22, and is used for realizing the relative fixation between the battery pack 23 and the transparent back plate 25, and increasing the probability of light emitted from the gap 232 to the reflector 26.
The specific type and configuration of the backsize layer 24 is not limited by the present application, and in one possible embodiment, the backsize layer 24 may be identical to the front side layer 22.
The battery pack 23 includes a plurality of battery pieces 231 arranged at intervals, and a gap 232 is formed between two adjacent battery pieces 231.
The specific arrangement manner of the plurality of battery pieces 231 is not limited in the present application, and in one possible embodiment, the plurality of battery pieces 231 are arranged in an array in a rectangular shape, and the size of the gap between two adjacent battery pieces 231 along the width direction is consistent with the size of the gap between two adjacent battery pieces 231 along the length direction.
Alternatively, the plurality of battery pieces 231 are arranged in a rectangular shape at intervals, and have a plurality of first gaps and a plurality of second gaps in the width direction, and the size of the first gaps is smaller than that of the second gaps. Alternatively, there are a plurality of third gaps and a plurality of fourth gaps along the length direction, and the size of the third gaps is smaller than the size of the fourth gaps.
Further, the area of a part of the gaps 232 among the plurality of gaps 232 is larger than the area of the battery piece 231.
For example, referring to fig. 3, a plurality of battery cells 231 are arranged in an array, and then the battery cells 231 at a part of the arrangement positions are removed to form voids.
Alternatively, in one possible embodiment, referring to fig. 4, the battery cells 231 are circular, and the plurality of battery cells 231 are arranged in a circular array along the circumferential direction, and a circular-like gap 232 is formed in the middle of the battery cell group 23.
Further, the electrical connection manner of the plurality of battery pieces 231 is not limited in the present application, and in one possible embodiment, the plurality of battery pieces 231 are connected in series.
Alternatively, in another possible embodiment, multiple battery plates 231 are connected in parallel.
The light-transmitting back plate 25 is used for supporting the battery pack 23, and the light-transmitting back plate 25 has good light transmittance, so that sunlight irradiates on the lower surface of the battery pack 23 through the light-transmitting back plate 25.
The specific material of the transparent back plate 25 is not limited in this application, and in one possible embodiment, the material of the transparent back plate 25 may be the same as the material of the transparent glass layer 21.
Alternatively, in another possible embodiment, the light transmissive backsheet 25 may be selected from one of a PVDF light transmissive sheet, a PTFE light transmissive sheet film, or a PVF light transmissive sheet.
The reflecting plate 26 is disposed below the transparent back plate 25 and opposite to the gap 232, so that the sunlight emitted from the gap 232 irradiates the reflecting plate 26 and can be reflected and irradiated on the lower surface of the battery pack 23.
The specific configuration of the reflector 26 is not limited in this application, and in one possible embodiment, the reflector 26 may be an arcuate configuration.
Further, with continued reference to fig. 2, the convex surface of the reflective plate 26 with an arc structure is opposite to the transparent back plate 25.
Further, the reflective plate 26 with an arc structure may include a glass plate and a reflective metal layer disposed on a lower surface of the glass plate.
Further, the photovoltaic module 2 provided by the present examples may include multiple sets of first modules 20. Referring to fig. 5, a plurality of groups of first assemblies 20 are sequentially arranged along a thickness direction D1; the reflector 26 is a reflective glass plate, and the lower set of light-transmitting glass layers 21 of the first assembly 20 is adjacent to the upper set of reflector 26 of the first assembly 20.
The plurality of first assemblies 20 are sequentially arranged along the thickness direction D1, and the light-transmitting glass layer 21 of the lower first assembly 20 is adjacent to the light-reflecting plate 26 of the upper first assembly 20, so that when the sunlight emitted from the gap 232 of the upper first assembly 20 irradiates onto the light-reflecting plate 26, a part of the light is reflected, irradiates onto the lower surface of the battery pack 23 of the upper first assembly 20, and another part of the light is refracted, and is emitted to the next first assembly 20, thereby improving the utilization rate of the sunlight.
In order to further increase the light receiving efficiency of the next set of first components 20, in one possible embodiment, a portion of the light reflecting plate 26 corresponding to the area of the gap 232 may be configured as a hollow structure, so that a portion of the light emitted from the gap 232 in the previous set of first components 20 is directly irradiated to the next set of first components 20 from the hollow portion of the light reflecting plate 26.
That is, the reflector 26 has a first position corresponding to the gap 232, and a part of the area in the first position is in a hollow structure.
Further, the reflector 26 in the first component 20 at the bottom layer may not have a hollow structure.
Further, the present application example also provides a method for preparing the photovoltaic module 2, including:
the upper surface of the light-transmitting backboard 25 is provided with first adhesives which are arranged at intervals; the plurality of battery pieces 231 are arranged on the first adhesive at intervals, and the plurality of battery pieces 231 are connected in an ohmic mode to form a series circuit or a parallel circuit, so that a battery piece group 23 is formed; arranging second adhesives on the lower surface of the light-transmitting glass layer 21 at intervals, and pressing the light-transmitting glass layer 21 provided with the second adhesives above the battery piece group 23 to form a first prefabricated member; heating and pressurizing the first prefabricated part to solidify the first adhesive to form a front adhesive layer 22, and solidifying the second adhesive to form a back adhesive layer 24 to obtain a second prefabricated part; the second preform is fixed above the reflector 26 such that the gap 232 is opposite the reflector 26.
Further, both the first adhesive and the second adhesive may be selected from EVA adhesives.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. The photovoltaic module is characterized by comprising a first module, wherein the first module comprises a light-transmitting glass layer, a front adhesive layer, a battery piece group, a back adhesive layer, a light-transmitting backboard and a reflecting plate which are sequentially arranged along the thickness direction; the battery piece group comprises a plurality of battery pieces, each battery piece is horizontally laid between the front adhesive layer and the back adhesive layer, a gap is formed between two adjacent battery pieces, the front adhesive layer is provided with a first area right opposite to the gap and a second area outside the first area, and the light transmittance of the first area is larger than that of the second area; the back adhesive layer is provided with a third area and a fourth area, wherein the third area and the fourth area are positively corresponding to the gap, and the light transmittance of the third area is larger than that of the fourth area; the reflector is opposite to the gap.
2. The photovoltaic module of claim 1, wherein the first region and/or the third region is/are hollow-out.
3. The photovoltaic module according to claim 2, wherein the orthographic projection of the first region and/or the third region in the thickness direction overlaps with an edge of the cell sheet.
4. The photovoltaic module of claim 1, wherein the reflector is an arc-shaped structure having a convex surface opposite the light transmissive backsheet.
5. The photovoltaic module of claim 1, wherein the light transmissive backsheet is selected from one of a PVDF light transmissive sheet, a PTFE light transmissive sheet film, or a PVF light transmissive sheet.
6. The photovoltaic assembly of claim 1, wherein at least a portion of the gap satisfies: the size of the minimum gap between two adjacent battery pieces is larger than the width of the battery pieces in the direction of the minimum gap.
7. The photovoltaic module according to claim 1, wherein the photovoltaic module includes a plurality of sets of the first modules, the plurality of sets of the first modules being disposed in order along the thickness direction; the light reflecting plate is a light reflecting glass plate, and the light transmitting glass layer of the lower group of the first components is close to the light reflecting plate of the upper group of the first components.
8. The photovoltaic module according to claim 7, wherein the light reflecting plate is provided with a hollowed-out portion for allowing light transmitted through the gaps of the photovoltaic module of the previous group to pass through the hollowed-out portion.
9. A method of manufacturing a photovoltaic module according to any one of claims 1 to 8, comprising:
the upper surface of the light-transmitting backboard is provided with first adhesives which are arranged at intervals; arranging a plurality of battery pieces on the first adhesive at intervals, and forming a series or parallel circuit by ohmic connection of the plurality of battery pieces to form the battery piece group; arranging second adhesives on the lower surface of the light-transmitting glass layer at intervals, and laminating the light-transmitting glass layer provided with the second adhesives above the battery piece group to form a first prefabricated member; heating and pressurizing the first prefabricated member to enable the first adhesive to be solidified to form the front adhesive layer, and enabling the second adhesive to be solidified to form the back adhesive layer, so that a second prefabricated member is obtained; and fixing the second prefabricated member above the reflecting plate so that the gap is opposite to the reflecting plate.
10. The method of claim 9, wherein the first adhesive and/or the second adhesive is selected from EVA.
CN202311397328.7A 2023-10-25 2023-10-25 Photovoltaic module and preparation method thereof Pending CN117438490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311397328.7A CN117438490A (en) 2023-10-25 2023-10-25 Photovoltaic module and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311397328.7A CN117438490A (en) 2023-10-25 2023-10-25 Photovoltaic module and preparation method thereof

Publications (1)

Publication Number Publication Date
CN117438490A true CN117438490A (en) 2024-01-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311397328.7A Pending CN117438490A (en) 2023-10-25 2023-10-25 Photovoltaic module and preparation method thereof

Country Status (1)

Country Link
CN (1) CN117438490A (en)

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