CN221041144U - Photovoltaic electrode unit - Google Patents
Photovoltaic electrode unit Download PDFInfo
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- CN221041144U CN221041144U CN202321878154.1U CN202321878154U CN221041144U CN 221041144 U CN221041144 U CN 221041144U CN 202321878154 U CN202321878154 U CN 202321878154U CN 221041144 U CN221041144 U CN 221041144U
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- electrode unit
- conductors
- photovoltaic
- photovoltaic electrode
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- 150000002739 metals Chemical class 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
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- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229920002319 Poly(methyl acrylate) Polymers 0.000 claims description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- NXDJCCBHUGWQPG-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol;terephthalic acid Chemical compound OCC1CCC(CO)CC1.OC(=O)C1=CC=C(C(O)=O)C=C1 NXDJCCBHUGWQPG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
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- 229910052792 caesium Inorganic materials 0.000 claims description 3
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- 229910052802 copper Inorganic materials 0.000 claims description 3
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- 239000000839 emulsion Substances 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 239000011133 lead Substances 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052753 mercury Inorganic materials 0.000 claims description 3
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- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 description 2
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Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model relates to a photovoltaic electrode unit which comprises a carrier and a plurality of conductors arranged on the carrier, wherein the conductors form a plurality of arrays, the cross sections of the conductors in the same array are the same, the cross sections of the conductors in different arrays are different, and the arrays are arranged according to the ascending order of the cross sections of the conductors. When the utility model is used for connecting photovoltaic cells in series, the shielding area for incident light can be reduced, and the photoelectric conversion efficiency of the photovoltaic cells is improved.
Description
Technical Field
The utility model relates to the field of photovoltaic power generation, in particular to a photovoltaic electrode unit.
Background
Photovoltaic power generation is a technology that uses the photovoltaic effect of a semiconductor interface to directly convert light energy into electrical energy. Mainly comprises three parts of a solar battery assembly, a controller and an inverter. The photovoltaic cells are packaged and protected after being connected in series, so that a large-area solar cell assembly can be formed, and the photovoltaic power generation device is formed by matching with components such as a power controller.
At present, the series connection of the photovoltaic cells is realized through the connection of the photovoltaic electrodes, the connection of the conductors of the photovoltaic electrodes and the photovoltaic cells can partially shield the incident light, a shadow area is formed on the light receiving surface of the photovoltaic cells, so that the sunlight reaching the surface of the silicon wafer is reduced, the loss of the incident light is caused, and the collection of partial current is reduced, so that the photoelectric conversion efficiency of the photovoltaic cells is lower.
Disclosure of utility model
In order to solve the problems, the utility model provides a photovoltaic electrode unit which can reduce the shielding area for incident light and improve the photoelectric conversion efficiency of a photovoltaic cell when being used for connecting the photovoltaic cells in series.
The utility model is realized by the following scheme: the photovoltaic electrode unit comprises a carrier and a plurality of conductors arranged on the carrier, wherein the conductors form a plurality of arrays, the cross sections of the conductors in the same array are the same, the cross sections of the conductors in different arrays are different, and the arrays are arranged according to the ascending order of the cross sections of the conductors.
According to the photovoltaic cell, the conductors are arranged in the form of the plurality of arrays, the cross sections of the conductors of each array are consistent, and the different arrays are arranged according to the ascending order of the cross sections of the conductors, so that the current carrying capacity of the photovoltaic electrode unit can be consistent with the current carrying capacity of the converging current when the photovoltaic cells are connected in series, and the current carrying capacity of all conductors on the whole series path is not required to be designed according to the maximum current of the tail ends, so that the waste of the size of the conductors is avoided, the cost is reduced, the shielding area of the conductors to incident light when the conductors are connected with the photovoltaic cells is reduced, the photoelectric conversion efficiency of the photovoltaic cells is improved, and the energy consumption is reduced.
A further improvement of the photovoltaic electrode unit according to the utility model is that the electrical conductor is located on the surface of the carrier.
The photovoltaic electrode unit is further improved in that a conductive metal layer is arranged on the surface of the carrier, and the electric conductor is formed on the conductive metal layer.
The photovoltaic electrode unit is further improved in that the carrier is provided with the caulking grooves for the conductors to be correspondingly embedded and fixed, and the conductors are fully embedded in the corresponding caulking grooves.
The photovoltaic electrode unit is further improved in that the caulking groove is a through groove penetrating through the carrier in the thickness direction of the carrier.
The photovoltaic electrode unit is further improved in that the caulking groove is a sinking groove which is formed in the thickness direction of the carrier and one side of the caulking groove is closed.
A further improvement of the photovoltaic electrode unit of the present utility model is that the electrical conductor is rectangular in shape.
A further improvement of the photovoltaic electrode unit of the present utility model is that the material of the electrical conductor is selected from copper, nickel, tin, bismuth, gold, zinc, silver, palladium, cesium, lithium, potassium, sodium, lead, gallium, indium, mercury or alloys thereof, or formate-containing metals.
A further improvement of the photovoltaic electrode unit of the present utility model is that the carrier satisfies a melting point of more than 40 ℃ and a light transmittance of more than 85%.
A further improvement of the photovoltaic electrode unit according to the utility model is that the carrier is selected from the group consisting of PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PCT (1, 4-cyclohexanedimethanol terephthalate), PC (polycarbonate), PETG (polyethylene terephthalate-1, 4-cyclohexanedimethanol), PMMA (polymethyl methacrylate), COC (cyclic olefin copolymer), EVA (ethylene-vinyl acetate polymer), POE (ethylene-alpha olefin polymer), EMA (ethylene-methyl acrylate copolymer), EAA (ethylene-acrylic acid copolymer), EMMA (ethylene-methyl methacrylate copolymer), epoxy resin, silicone resin, PMA (acrylate), PU (polyurethane), VAE (vinyl acetate-ethylene copolymer emulsion), PVB (polyvinyl butyral) or a composite sheet thereof.
Drawings
Fig. 1 shows an exploded perspective view of a conventional photovoltaic electrode unit.
Fig. 2 shows a schematic plan view of an electrical conductor on a carrier in a conventional photovoltaic electrode unit.
Fig. 3 shows an exploded perspective view of a first embodiment of the photovoltaic electrode unit of this invention.
Fig. 4 shows an exploded perspective view of a second embodiment of the photovoltaic electrode unit of this invention.
Fig. 5 shows a schematic plan view of the electrical conductor on the carrier in the photovoltaic electrode unit of the present invention.
Detailed Description
Referring to fig. 1 and 2, currently, a conventional photovoltaic electrode unit includes a carrier 10 and a plurality of electrical conductors 20 disposed on the carrier 10, wherein the plurality of electrical conductors 20 are arranged in an array, and cross sections of the electrical conductors 20 are the same, and the size of the cross section is determined according to current-carrying requirements corresponding to the current magnitude at the end of a current collecting path. Specifically, the photovoltaic electrode units are used in pairs when in use, the carriers 10 of the two photovoltaic electrode units are respectively clamped at the upper side and the lower side of one or more photovoltaic cells, the conductor 20 on the carrier 10 positioned at the upper side is used as the positive electrode or the negative electrode of the photovoltaic cell, the conductor 20 on the carrier positioned at the lower side is used as the negative electrode or the positive electrode of the photovoltaic cell, the positive electrode of one photovoltaic cell and the negative electrode of the other photovoltaic cell are connected through the connecting body, and finally, the current is led out through the positive electrode or the negative electrode of the photovoltaic cell at the junction end, so that a junction path is realized, and the size of the cross section of all the conductors 20 on the junction path is determined according to the current carrying requirement corresponding to the current size of the tail end of the junction path.
However, in practice, the current is gradually increased along the converging direction, that is, the current flowing through the beginning of the converging path is smaller than the current flowing through the end of the converging path, so that the existing photovoltaic electrode units are adopted to connect photovoltaic cells in series, the conductor before the end of the converging path has the problem of larger cross section, and the larger cross section does not influence current conduction, but does result in larger volume of part of the conductor, so that on one hand, the waste of the manufacturing material of the photovoltaic electrode units is caused, the cost is increased, on the other hand, the unnecessary shielding of incident light is increased, the photoelectric conversion efficiency of the photovoltaic cells is reduced, and the energy consumption is increased.
The present utility model improves upon existing photovoltaic electrode units in view of the above-described problems. The photovoltaic electrode unit of the present utility model will be further described with reference to the drawings by way of specific examples.
Referring to fig. 3 to 5, the photovoltaic electrode unit of the present embodiment also includes a carrier 10 and a plurality of electrical conductors 20 disposed on the carrier 10, where the plurality of electrical conductors 20 form a plurality of arrays, i.e. arrays I, II, III, IV, V. In the photovoltaic electrode unit of this embodiment, the cross sections of the conductors 20 in the same array are the same, the cross sections of the conductors 20 in different arrays are different, and the plurality of arrays are arranged in the order of increasing cross sections of the conductors along the a direction, that is, the cross section of the conductor of the array I is smaller than the cross section of the conductor of the array II, … …, and smaller than the cross section of the conductor of the array V. Specifically, the shape of the conductive body 20 in the present embodiment is rectangular, and the lengths of the conductive bodies 20 are the same, but the widths and/or heights are different, and the cross-sections are different by the differences in width and/or height. When the photovoltaic electrode units are used in pairs, the carriers 10 of the two photovoltaic electrode units are symmetrically clamped on the upper side and the lower side of one or more photovoltaic cells, the conductor 20 on the carrier 10 on the upper side is used as the positive electrode or the negative electrode of the photovoltaic cell, the conductor 20 on the carrier on the lower side is used as the negative electrode or the positive electrode of the photovoltaic cell, the positive electrode of one photovoltaic cell and the negative electrode of the other photovoltaic cell are connected through the connector to realize series connection of the photovoltaic cells, a cell string (namely a converging path) connected in series along the A direction is formed, and finally, the current is led out through the positive electrode or the negative electrode (namely the end conductor 20 pointed in the A direction) of the photovoltaic cell 30 at the tail end of the converging path. According to the embodiment, through the array arrangement, the change rule of the cross section of the conductor and the matching of the series battery strings along the increasing direction (namely the A direction) of the cross section of the conductor when the photovoltaic electrode units are used for being connected with the photovoltaic cells in series, the consistency of the current carrying capacity of the photovoltaic electrode units and the magnitude of the converging current can be realized, so that the waste of the conductor size is avoided, the cost is reduced, the shielding area of the conductor to incident light when the conductor is connected with the photovoltaic cells is reduced, the photoelectric conversion efficiency of the photovoltaic cells is improved, and the energy consumption is reduced.
In this embodiment, the material of the conductor 20 is selected from copper, nickel, tin, bismuth, gold, zinc, silver, palladium, cesium, lithium, potassium, sodium, lead, gallium, indium, mercury, alloys of the above metals, and formate-containing metals. The carrier 10 is selected from PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PCT (1, 4-cyclohexanedimethanol terephthalate), PC (polycarbonate), PETG (polyethylene terephthalate-1, 4-cyclohexanedimethanol terephthalate), PMMA (polymethyl methacrylate), COC (cyclic olefin copolymer), EVA (ethylene-vinyl acetate polymer), POE (ethylene-alpha olefin polymer), EMA (ethylene-methyl acrylate copolymer), EAA (ethylene-acrylic acid copolymer), EMMA (ethylene-methyl methacrylate copolymer), epoxy resin, silicone resin, PMA (acrylate), PU (polyurethane), VAE (vinyl acetate-ethylene copolymer emulsion), PVB (polyvinyl butyral) or a composite sheet thereof. And the carrier 10 satisfies a melting point of more than 40 ℃ and a light transmittance of more than 85%.
In this embodiment, at least one side surface of the carrier 10 is provided with an adhesive material. I.e. the carrier 10 is provided with adhesive material on only one side surface or on both side surfaces of the carrier 1. Whether only one side surface is provided with adhesive material or both side surfaces are provided with adhesive material depends on the structure of the encapsulation material in the photovoltaic electrode module:
The adhesive material is only arranged on one side surface of the carrier 10 and is mainly used for adhering and fixing the carrier 10 and the conductor 20 with the photovoltaic cells, the adhesive material arranged on one side surface can be fully distributed on the surface of the carrier 10, at the moment, the conductor 20 is arranged on the surface of the adhesive material, the adhesive material is simultaneously used for adhering the photovoltaic cells and the conductor 20, or can be distributed on the surface of the carrier 10 in a mode of avoiding the conductor 20, namely, the adhesive material is arranged at a gap of the conductor 20, and can be spread and extruded towards two sides when being laminated, and is contacted with the conductor 20, or can be used for adhering the conductor 20 and the photovoltaic cells simultaneously.
The bonding materials are arranged on the two side surfaces of the carrier 10, wherein the bonding material on one side surface is used for bonding the carrier 10 and the electric conductor 20 with the photovoltaic cell, and the bonding material on the other side surface is used for replacing the packaging adhesive film, so that the integration of the adhesive film and the electrode is realized, and the bonding material is used for bonding the cover plate of the packaging material.
Regarding the arrangement of the electrical conductor 20, two embodiments are provided below:
First embodiment: as shown in fig. 3, the electrical conductor 20 is located on the surface of the carrier 10. Specifically, the carrier 10 may be coated with ink to form a conductive metal layer, and then the corresponding conductive body 20 may be deposited on the conductive metal layer by electroplating. Alternatively, the conductive metal layer is formed by printing ink on the carrier 10, activating the ink, and chemically depositing. Alternatively, the ink is provided with a conductive function by printing the ink on the carrier 10, in which case the ink is the conductive metal layer, without further activation and electroless deposition.
Second embodiment: as shown in fig. 4, the carrier 10 is provided with a caulking groove 100 for caulking the conductor 20, and the conductor 20 is fully inserted into the caulking groove 100. That is, the shape of each caulking groove 100 should be consistent with the preset shape of the corresponding electric conductor 20. The caulking groove 100 may be a through groove penetrating the carrier 10 in the thickness direction of the carrier 10, or a countersink which is opened in the thickness direction of the carrier 10 and has one side closed.
The present utility model has been described in detail with reference to the examples of the drawings, and the above embodiments are merely preferred embodiments, and in practice, the present utility model is not limited to the above embodiments, and the materials of the first conductive layer and the second conductive layer are not limited to the above embodiments, and those skilled in the art can make various modifications to the present utility model according to the above concepts. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the utility model, which is defined by the appended claims.
Claims (10)
1. The photovoltaic electrode unit is characterized by comprising a carrier and a plurality of conductors arranged on the carrier, wherein the conductors form a plurality of arrays, the cross sections of the conductors in the same array are the same, the cross sections of the conductors in different arrays are different, and the arrays are arranged according to the ascending order of the cross sections of the conductors.
2. The photovoltaic electrode unit of claim 1, wherein the electrical conductor is located on a surface of the carrier.
3. The photovoltaic electrode unit of claim 2, wherein a surface of the carrier is provided with a conductive metal layer, and the electrical conductor is formed on the conductive metal layer.
4. The photovoltaic electrode unit according to claim 1, wherein the carrier is provided with caulking grooves for the conductors to be correspondingly caulked, and the conductors are fully embedded in the corresponding caulking grooves.
5. The photovoltaic electrode unit of claim 4, wherein the caulking groove is a through groove penetrating the carrier in a thickness direction of the carrier.
6. The photovoltaic electrode unit of claim 4, wherein the caulking groove is a countersink that is open in a thickness direction of the carrier and has one side closed.
7. The photovoltaic electrode unit of claim 1, wherein the electrical conductor is rectangular in shape.
8. The photovoltaic electrode unit of claim 1, wherein the material of the electrical conductor is selected from one of copper, nickel, tin, bismuth, gold, zinc, silver, palladium, cesium, lithium, potassium, sodium, lead, gallium, indium, mercury, or from one of formate-containing metals.
9. The photovoltaic electrode unit of claim 1 wherein the carrier satisfies a melting point greater than 40 ℃ and a light transmittance greater than 85%.
10. The photovoltaic electrode unit of claim 1, wherein the carrier is selected from one of PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PCT (1, 4-cyclohexanedimethanol terephthalate), PC (polycarbonate), PETG (polyethylene terephthalate-1, 4-cyclohexanedimethanol), PMMA (polymethyl methacrylate), COC (cyclic olefin copolymer), EVA (ethylene-vinyl acetate polymer), POE (ethylene-alpha olefin polymer), EMA (ethylene-methyl acrylate copolymer), EAA (ethylene-acrylic acid copolymer), EMMA (ethylene-methyl methacrylate copolymer), epoxy, silicone resin, PMA (acrylate), PU (polyurethane), VAE (ethylene-vinyl acetate copolymer emulsion), PVB (polyvinyl butyral).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321878154.1U CN221041144U (en) | 2023-07-17 | 2023-07-17 | Photovoltaic electrode unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321878154.1U CN221041144U (en) | 2023-07-17 | 2023-07-17 | Photovoltaic electrode unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221041144U true CN221041144U (en) | 2024-05-28 |
Family
ID=91181765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321878154.1U Active CN221041144U (en) | 2023-07-17 | 2023-07-17 | Photovoltaic electrode unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221041144U (en) |
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- 2023-07-17 CN CN202321878154.1U patent/CN221041144U/en active Active
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