CN112259627A - High-efficient high conversion rate photovoltaic module - Google Patents

High-efficient high conversion rate photovoltaic module Download PDF

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Publication number
CN112259627A
CN112259627A CN201911384070.0A CN201911384070A CN112259627A CN 112259627 A CN112259627 A CN 112259627A CN 201911384070 A CN201911384070 A CN 201911384070A CN 112259627 A CN112259627 A CN 112259627A
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China
Prior art keywords
cover plate
photovoltaic module
solar cells
string
packaging material
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CN201911384070.0A
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Chinese (zh)
Inventor
林俊良
陈燕平
李清波
范喜燕
林金锡
林金汉
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Changzhou Almaden Co Ltd
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Changzhou Almaden Co Ltd
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Priority to CN201911384070.0A priority Critical patent/CN112259627A/en
Publication of CN112259627A publication Critical patent/CN112259627A/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
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • 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
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Abstract

The invention relates to the technical field of photovoltaics, in particular to a high-efficiency high-conversion-rate photovoltaic module which comprises an upper cover plate and a lower cover plate, wherein solar cells are arranged between the upper cover plate and the lower cover plate, the solar cells and the upper cover plate are packaged through an upper packaging material, the solar cells and the lower cover plate are packaged through a lower packaging material, the solar cells are connected in series through interconnection bars to form cell strings, the cell strings are interconnected through bus bars, intra-string gaps are reserved between adjacent solar cells in the same cell string, the width of the intra-string gaps is larger than or equal to 3mm, electric conductors are arranged in the intra-string gaps, and the electric conductors are electrically connected with the interconnection bars in the intra-string gaps. Meanwhile, through circuit optimization, the increase of series resistance caused by lengthening of the welding strip due to the increase of the gap is reduced.

Description

High-efficient high conversion rate photovoltaic module
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a high-efficiency high-conversion-rate photovoltaic module.
Background
With the rapid development of the photovoltaic industry, the development of high-efficiency and high-conversion-rate components is a key research topic of each processing enterprise. At present, the high-power and high-efficiency module technology in the industry mainly takes a stack module and a half-cell module as the representative advanced technologies. The existing technologies such as the stack module and the half cell module mainly aim to reduce the power attenuation caused by the series resistance during the packaging of the module, but reduce the light reuse in the cell gap.
Disclosure of Invention
In order to solve the problem of low light utilization rate in a cell gap in the prior art, the invention provides a high-efficiency high-conversion-rate photovoltaic module which can reduce the power attenuation of a series resistor and simultaneously maximally utilize light in the cell gap.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a high-efficient high conversion rate photovoltaic module, includes upper cover plate and lower floor's apron, upper cover plate and lower floor's apron between have solar cell, solar cell and upper cover plate between through last encapsulating material encapsulation, through encapsulating material encapsulation down between solar cell and the lower floor's apron, establish ties through interconnection bar between the solar cell and form the battery cluster, carry out the interconnection through the busbar between the battery cluster, leave the interior clearance of cluster between the adjacent solar cell of same battery cluster, the width more than or equal to 3mm of interior clearance of cluster is equipped with the electric conductor in the interior clearance of cluster, electric conductor and the equal electric connection of interconnection bar in the interior clearance of cluster, the electric conductor have the material that has reflection of light characteristic on for the electric conductor that itself has reflection of light characteristic or the electric conductor.
Furthermore, the width of the gaps in the strings between the adjacent solar cells is 3-20 mm.
Furthermore, the interconnection bars in the gaps in the solar cell strings are electrically connected with the reflective electric conductors through bus bars or conductive adhesive tapes to form a parallel circuit.
Furthermore, a reflective film is attached to the bus bar for connecting the battery string and the bus bar for connecting the interconnection bar and the reflective conductor.
Further, the light reflecting properties of the electrical conductor are diffuse reflection and directional reflection.
Further, the upper packaging material is high-transparency EVA, POE or PVB.
Further, the lower packaging material is white EVA, white POE, transparent EVA or transparent POE.
Has the advantages that:
(1) according to the photovoltaic module, the gaps and the string gaps of the solar cells are enlarged, so that the light utilization rate of the gaps is increased, and the power of the module is improved;
(2) through circuit optimization, the increase of series resistance caused by lengthening of a welding strip due to increase of gaps is reduced;
(3) the high-efficiency high-conversion-rate component assembly is high in conversion efficiency and simple in structure. Compared with other assembly technologies, the assembly has the characteristics of low equipment modification cost, strong operability and the like.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a sectional view showing the mounting and dismounting of a solar cell package;
fig. 2 is a layout of photovoltaic modules.
Wherein, 1, stringing inner gap, 2, stringing outer gap, 3, solar battery, 4, electric conductor, 5, interconnection bar, 6, upper cover plate, 7, upper packaging material, 8, lower packaging material, 9, lower cover plate.
Detailed Description
As shown in fig. 1-2, a high-efficiency high-conversion-rate photovoltaic module comprises an upper cover plate 6 and a lower cover plate 9, a solar cell 3 is arranged between the upper cover plate 6 and the lower cover plate 9, the solar cell 3 and the upper cover plate 6 are encapsulated by an upper encapsulating material 7, the solar cell 3 and the lower cover plate 9 are encapsulated by a lower encapsulating material 8, the solar cells 3 are connected in series by an interconnecting bar 5 to form a cell string, the cell strings are interconnected by a bus bar, an inter-string gap 1 is reserved between adjacent solar cells 3 in the same cell string, the width of the inter-string gap 1 is larger than or equal to 3mm, an electric conductor 4 is arranged in the inter-string gap 1, and the electric conductor 4 is electrically connected with the interconnecting bar 5 in the inter-string gap 1.
The electric conductor 4 is an electric conductor with a light reflecting property or a light reflecting layer with a light reflecting property is attached on the electric conductor 4, and the light reflecting property of the electric conductor 4 or the light reflecting layer is diffuse reflection and directional reflection. Alternatively, the electrical conductor 4 is a reflective electrical conductor or a reflective film is adhered to the electrical conductor 4. The reflective electrical conductor is a conductive material with certain reflectivity, such as a conductive metal.
The width of the inter-string gap 1 between adjacent solar cells 3 is 3-20 mm.
The interconnection bars 5 in the gaps 1 in the string of solar cells 3 are electrically connected to the light-reflecting electrical conductors 4 by bus bars or conductive tapes, forming a parallel circuit.
And reflective films are attached to the bus bars for connecting the battery strings and the bus bars for connecting the interconnection bars 5 and the reflective conductors.
The upper cover 6 has a light transmittance of 90% or more in the visible light range.
The upper cover plate 6 is made of toughened glass, and the thickness of the toughened glass is less than 3.2 mm.
A high efficiency, high conversion photovoltaic module according to claim 1, wherein: the lower cover plate 9 is made of photovoltaic glass.
The upper packaging material 7 is high-transparency EVA, POE or PVB.
The lower packaging material 8 is white EVA, white POE, transparent EVA or transparent POE.
The invention relates to a high-efficiency high-conversion-rate photovoltaic module, which designs an optimized circuit arrangement mode of solar photovoltaic module cells, and the photovoltaic module comprises front high-transmittance toughened glass, a back protective back plate, packaging materials, solar cells 3, a junction box and the like. The solar cells 3 are welded by the interconnecting strips to form a positive electrode and a negative electrode which are connected in series to form a cell string. And then interconnecting the battery strings by using the bus bars to form a conductive path. And finally, the bus bar and the photovoltaic junction box are interconnected to form a circuit output. Wherein the gap light utilization is increased by adjusting the arrangement gap of the solar cells 3 and the cell string gap. In addition, a conductive material with certain reflectivity is welded or welded on the interconnection strips 5 in the gaps of the solar cells 3 so as to reduce the resistance of the series circuit.
The upper cover plate 6 and the lower cover plate 9 are bonded by an upper sealing material 7 and a lower sealing material 8. Meanwhile, solar cells 3 are packaged between the upper packaging material 7 and the lower packaging material 8, the solar cells 3 are connected through the interconnection bars 5, and finally the solar cells are gathered and led out through the bus bars to form a power generation circuit. The lower cover plate 9 can be a photovoltaic back plate or photovoltaic glass. Wherein the lower cover plate 9 may have certain light reflecting properties. The packaging material is divided into an upper layer and a lower layer, the upper layer packaging material 7 is a packaging material with high transmittance such as EVA, POE, PVB and the like, and the lower layer packaging material 8 is a packaging material with light reflection property (such as white EVA and white POE) or a conventional packaging material (such as transparent EVA or transparent POE). A string inner gap 1 is reserved between the solar cells 3, and the width of the string inner gap 1 is 3-12 mm. The plurality of interconnection bars 5 in the series internal gap 1 are connected with the electric conductor 4 by conductive materials such as bus bars or conductive tapes to form a parallel circuit, and the electric conductor 4 which is connected with the plurality of interconnection bars 5 in parallel in the series internal gap 1 has a certain reflectivity or is adhered with a reflective film on the surface thereof. The light in the gap is reflected onto the solar cell 3.
The first embodiment is as follows:
the photovoltaic module of the embodiment comprises an upper cover plate (2.0 mm embossed toughened glass), a lower cover plate (2.0 mm float toughened glass), packaging materials (7 and 8, namely high-transmittance EVA) and high-reflection EVA), a solar cell (3), a junction box and the like. The solar cells 3 are arranged in a circuit manner to form 6 cell strings, the cell strings are connected in series by bus bars with the width of 8mm and the thickness of 0.23mm, a reflective film with the thickness of 10 x 0.12mm is also attached to the bus bars, and each cell string is formed by connecting 10 solar cells 3 in series through the interconnecting bars 5. In this embodiment, the solar cell 3 string indicated in fig. 2 has an inner gap 1 of 6mm and an outer gap 2 of 3mm between 6 cells. Several interconnecting strips 5 in the gaps 1 in the solar cell 3 string are welded and connected in parallel by bus bars with the width of 5mm and the thickness of 0.2mm, and reflective films are stuck on the surfaces of the bus bars, and the specification of the reflective films is 6 x 0.12 mm.
Comparing the power of the components in the examples with that of a conventional large gap component shows that there will be a 1% increase in power of the structural component. The data are as follows:
Figure BDA0002343064000000051
example two
The photovoltaic module of the embodiment comprises an upper cover plate (2.0 mm embossed toughened glass), a lower cover plate (2.0 mm float toughened glass), packaging materials (7 and 8, namely high-transmittance EVA) and high-reflection EVA), a solar cell (3), a junction box and the like. The solar cell circuit is arranged into 6 cell strings, the solar cells 3 are connected in series by bus bars with the width of 8mm and the thickness of 0.23mm, a reflective film with the thickness of 9 x 0.12mm is also attached to the bus bars, and each cell string is formed by connecting 10 solar cells 3 in series through the interconnecting bars 5. In this embodiment, the solar cell 3 string indicated in fig. 2 has an inner gap 1 of 9mm and 6 string gaps 2 of 3 mm. Several interconnecting bars 5 in the gaps 1 in the solar cell 3 are welded and connected in parallel by bus bars 4 with the width of 8mm and the thickness of 0.23mm, and the surface of the bus bars 4 is stuck with a reflective film with the specification of 9 x 0.12 mm.
Figure BDA0002343064000000061
Comparing the power of the assembly of example 2 with that of a conventional large gap assembly as described above shows that there will be a 1.6% increase in power for the structural assembly.
It should be understood that the above-described specific embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Obvious variations or modifications which are within the spirit of the invention are possible within the scope of the invention.

Claims (7)

1. A high-efficiency high-conversion-rate photovoltaic module is characterized by comprising an upper cover plate (6) and a lower cover plate (9), wherein a solar cell (3) is arranged between the upper cover plate (6) and the lower cover plate (9), the solar cell (3) and the upper cover plate (6) are packaged by an upper packaging material (7), the solar cell (3) and the lower cover plate (9) are packaged by a lower packaging material (8), the solar cells (3) are connected in series by interconnecting strips (5) to form cell strings, the cell strings are interconnected by bus bars, an inter-string gap (1) is reserved between adjacent solar cells (3) in the same cell string, the width of the inter-string gap (1) is more than or equal to 3mm, an electric conductor (4) is arranged in the inter-string gap (1), the electric conductor (4) is electrically connected with the interconnecting strips (5) in the inter-string gap (1), the electric conductor (4) is an electric conductor with a light reflecting property or a material with a light reflecting property is attached to the electric conductor (4).
2. A high efficiency, high conversion efficiency photovoltaic module as defined in claim 1, wherein: the width of the inter-string gap (1) between adjacent solar cells (3) is 3-20 mm.
3. A high efficiency, high conversion efficiency photovoltaic module as defined in claim 1, wherein: the interconnection bars (5) in the gaps (1) in the strings of solar cells (3) are electrically connected with the reflective electric conductors (4) through bus bars or conductive tapes to form a parallel circuit.
4. A high efficiency high conversion photovoltaic module according to claim 3, wherein: and reflective films are adhered to the bus bar for connecting the battery strings and the bus bar for connecting the interconnection bar (5) and the reflective conductor.
5. A high efficiency, high conversion efficiency photovoltaic module as defined in claim 1, wherein: the light-reflecting properties of the electrical conductor (4) are diffuse reflection and directional reflection.
6. A high efficiency, high conversion efficiency photovoltaic module as defined in claim 1, wherein: the upper packaging material (7) is high-permeability EVA, POE or PVB.
7. A high efficiency, high conversion efficiency photovoltaic module as defined in claim 1, wherein: the lower packaging material (8) is white EVA, white POE, transparent EVA or transparent POE.
CN201911384070.0A 2019-12-28 2019-12-28 High-efficient high conversion rate photovoltaic module Pending CN112259627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911384070.0A CN112259627A (en) 2019-12-28 2019-12-28 High-efficient high conversion rate photovoltaic module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
CN112259627A true CN112259627A (en) 2021-01-22

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