CN218734188U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN218734188U CN218734188U CN202223014282.XU CN202223014282U CN218734188U CN 218734188 U CN218734188 U CN 218734188U CN 202223014282 U CN202223014282 U CN 202223014282U CN 218734188 U CN218734188 U CN 218734188U
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- 239000010409 thin film Substances 0.000 claims description 23
- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 10
- KTSFMFGEAAANTF-UHFFFAOYSA-N [Cu].[Se].[Se].[In] Chemical compound [Cu].[Se].[Se].[In] KTSFMFGEAAANTF-UHFFFAOYSA-N 0.000 claims description 5
- 230000005611 electricity Effects 0.000 abstract description 10
- 239000011159 matrix material Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000004065 semiconductor Substances 0.000 description 13
- 238000010248 power generation Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- 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
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a photovoltaic module, which comprises a plurality of battery packs connected in series, wherein an inverter is connected between the battery pack at the head part and the battery pack at the tail part, each battery pack comprises a plurality of parallel battery units, each battery unit comprises a battery piece, the battery pieces are provided with junction boxes, and each junction box is provided with a positive input end, a positive output end, a negative input end and a negative output end; a first anti-reverse diode and a second anti-reverse diode are arranged in the junction box. The junction box of the utility model adopts a double-outlet mode, so that the cells are connected in series and in parallel, the problem that a combiner box (box) and a large number of photovoltaic cables are used before the inverter is connected is solved, and the engineering cost of the photovoltaic power station is effectively reduced; and the whole string of photovoltaic modules can not be pulled down to generate electricity, the barrel effect on the photovoltaic module matrix is eliminated, and the generating efficiency of the photovoltaic modules is improved.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic cell, concretely relates to photovoltaic module.
Background
A solar cell (photovoltaic cell) is a photoelectric element capable of converting energy, and its basic structure is formed by bonding P-type and N-type semiconductors. The most basic material of the semiconductor is 'silicon', which is not conductive, but if different impurities are doped into the semiconductor, the semiconductor can be made into a P-type semiconductor and an N-type semiconductor, and then the P-type semiconductor has a hole (the P-type semiconductor has one less electron with negative charge and can be regarded as one more positive charge) and has one more potential difference with a free electron with the N-type semiconductor to generate current, so when sunlight irradiates, the light can excite the electron in the silicon atom to generate convection of the electron and the hole, and the electron and the hole are influenced by the built-in potential and are respectively attracted by the N-type semiconductor and the P-type semiconductor to be gathered at two ends. At this time, if the external parts are connected by the electrodes, a loop is formed, which is the principle of solar cell power generation. In brief, the principle of solar photovoltaic power generation is a power generation method in which a solar cell absorbs sunlight with a wavelength of 0.4 to 1.1 μm (for silicon crystal) and directly converts light energy into electric energy to output.
Because the electricity generated by the solar cell is direct current and the civil and industrial electricity is alternating current, if power needs to be supplied to household appliances or various electrical appliances, a photovoltaic inverter needs to be additionally arranged to convert the direct current into the alternating current, and the power can be supplied to the household electricity or the industrial electricity. Generally, the rated voltage and current values of the input end of the photovoltaic inverter are multiple times of the voltage and current of a photovoltaic module, and particularly, the current of the silicon-based, copper Indium Gallium Selenide (CIGS), cadmium telluride (CdTe) and other thin film photovoltaic modules used for building integration is very low, so that the photovoltaic modules need to be connected in series and in parallel before being connected into the photovoltaic inverter to form a photovoltaic square matrix, and finally, the output voltage and current meet the requirements of the input end of the photovoltaic inverter.
As shown in fig. 1, the existing photovoltaic module only has a pair of positive and negative electrodes, which can only be connected in series but not in parallel, before being connected in parallel, the photovoltaic cells need to be first assembled into strings, and the positive and negative electrodes at two ends of each string are then connected in series into an additional combiner box (box) through photovoltaic cables and connected in parallel, so as to achieve the rated voltage and current values of the input end of the photovoltaic inverter. This technique has the following disadvantages:
1. the photovoltaic modules can only be connected in series, and a combiner box (box) and a large number of photovoltaic cables are needed to be used in parallel, so that the engineering cost of a photovoltaic power station is increased.
2. When the photovoltaic power station is designed, although shielding is avoided, the shielding sometimes happens when the photovoltaic power station slightly shields the local small area range of the photovoltaic square matrix, even after a photovoltaic cell is slightly shielded, the bypass diode does not work when reaching a threshold value, the whole string of power generation is influenced, the wooden barrel effect is obvious, and the power generation efficiency of the whole photovoltaic module is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a photovoltaic module for solve the above-mentioned problem that exists among the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a photovoltaic module comprises a plurality of battery packs connected in series, an inverter is connected between the battery pack at the head and the battery pack at the tail, each battery pack comprises a plurality of battery units connected in parallel, each battery unit comprises a battery piece, each battery piece is provided with a junction box, each junction box is provided with a positive input end, a positive output end, a negative input end and a negative output end, in two adjacent battery pieces of one battery pack, the positive output end of the junction box on one battery piece is connected with the positive input end of the junction box on the other battery piece, and the negative output end of the junction box on one battery piece is connected with the negative input end of the junction box on the other battery piece; a first anti-reverse diode and a second anti-reverse diode are arranged in the junction box, the anode of the first anti-reverse diode is connected with the anode input end, and the cathode of the first anti-reverse diode is connected with the anode output end; and the anode of the second anti-reverse diode is connected with the cathode input end, and the cathode of the second anti-reverse diode is connected with the cathode output end.
As an optional design structure of the above technical solution, the positive input end includes a positive input plug, and a positive input lead is connected between the positive input plug and the junction box.
As an optional design structure of the above technical solution, the positive output end includes a positive output plug, and a positive output wire is connected between the positive output plug and the junction box.
As an optional design structure of the above technical solution, the negative input end includes a negative input plug, and a negative input wire is connected between the negative input plug and the junction box.
As an optional design structure of the technical scheme, the negative output end comprises a negative output plug, and a negative output lead is connected between the negative output plug and the junction box.
As an optional design structure of the technical scheme, the cell slice is a cadmium telluride thin film cell slice.
As an optional design structure of the technical scheme, the battery piece is a copper indium gallium selenide thin-film battery piece.
As an optional design structure of the technical scheme, the battery piece is a silicon-based thin film battery piece.
The utility model has the advantages that:
the utility model provides a photovoltaic module, terminal box adopt two modes of being qualified for the next round of competitions for existing series connection has the parallelly connected structure again between the battery piece, has broken away from the problem that uses collection flow box (box) and a large amount of photovoltaic cable before inserting the dc-to-ac converter, has effectively reduced photovoltaic power plant engineering cost. Furthermore, the utility model discloses the utilization has the photovoltaic module of series connection and parallelly connected structure, combines photovoltaic module voltage to be influenced by the illumination less and the great characteristic of electric current by the illumination, optimizes photovoltaic square matrix circuit topological structure, reaches and slightly shelters from a slice battery piece, only influences a slice battery piece electricity generation, can not draw down the effect of whole photovoltaic module electricity generation, has eliminated the vat effect on the photovoltaic module square matrix, has improved photovoltaic module's generating efficiency.
Drawings
FIG. 1 is a schematic diagram of a prior art photovoltaic module;
fig. 2 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a junction box according to an embodiment of the present invention.
In the figure: 1-an inverter; 2-a battery cell; 3-a battery piece; 4-a junction box; 5-a first anti-reverse diode; 6-a second anti-reverse diode; 7-positive input plug; 8-positive input lead; 9-positive output plug; 10-positive output lead; 11-negative input plug; 12-negative input lead; 13-negative output plug; 14-negative output lead.
Detailed Description
Examples
As shown in fig. 2 and 3, the present embodiment provides a photovoltaic module including a plurality of battery packs connected in series, and an inverter 1 is connected between the battery pack at the head and the battery pack at the tail. A plurality of group battery form the square matrix structure, and each group battery is established ties in proper order, and the positive pole end of the group battery that is located the head is connected with the positive pole of dc-to-ac converter 1, and the negative pole end of the group battery that is located the afterbody is connected with the negative pole of dc-to-ac converter 1, and it need not to converge the flow box, directly links to each other group battery and dc-to-ac converter 1.
As shown in fig. 2, each battery pack includes a plurality of battery cells 2 connected in parallel, and the plurality of battery cells 2 are arranged in a line and connected in parallel. Specifically, each battery unit 2 includes a battery piece 3, the battery piece 3 is provided with a terminal box 4, the terminal box 4 draws out electric quantity generated by the battery piece 3, and each terminal box 4 is provided with a positive input end, a positive output end, a negative input end and a negative output end. In two adjacent battery slices 3 of one battery pack, the positive output end of the junction box 4 on one battery slice 3 is connected with the positive input end of the junction box 4 on the other battery slice 3, and the negative output end of the junction box 4 on one battery slice 3 is connected with the negative input end of the junction box 4 on the other battery slice 3.
As shown in fig. 3, a first anti-reverse diode 5 and a second anti-reverse diode 6 are arranged in the junction box 4, an anode of the first anti-reverse diode 5 is connected with an anode input end, and a cathode of the first anti-reverse diode 5 is connected with an anode output end; the anode of the second anti-reverse diode 6 is connected with the negative input end, and the cathode of the second anti-reverse diode 6 is connected with the negative output end. The junction box 4 is provided with two pairs of positive and negative outgoing lines, redundant ends can be plugged by a rubber plug, the junction box 4 adopts a double-outgoing-line mode, the cell pieces 3 can be connected in parallel and in series, and the engineering cost of the photovoltaic module can be reduced.
The cell piece 3 adopts a thin film cell, the thin film cell is a solar cell prepared by a layer of thin film as the name suggests, the silicon consumption is very little, the cost is easier to reduce, and simultaneously, the thin film cell is not only a high-efficiency energy product, but also a novel building material, and is easier to perfectly combine with a building. Under the background of continuous shortage of silicon raw materials in the international market, the thin film solar cell becomes a new trend and a new hot spot for the development of the international photovoltaic market.
The utility model discloses a terminal box 4 adopts the mode of two being qualified for the next round of competitions for existing series connection has parallelly connected structure again between the battery piece 3, has broken away from the problem that uses collection flow box (box) and a large amount of photovoltaic cable before inserting dc-to-ac converter 1, has effectively reduced photovoltaic power plant engineering cost. Furthermore, the utility model discloses the utilization has the photovoltaic module of series connection and parallelly connected structure, combines photovoltaic module voltage to be influenced by the illumination less and the great characteristic of electric current by the illumination, optimizes photovoltaic square matrix circuit topological structure, reaches and slightly shelters from a slice battery piece, only influences a slice battery piece electricity generation, can not draw down the effect of whole photovoltaic module electricity generation, has eliminated the vat effect on the photovoltaic module square matrix, has improved photovoltaic module's generating efficiency.
As shown in fig. 3, in the present embodiment, the positive input terminal includes a positive input plug 7, and a positive input lead 8 is connected between the positive input plug 7 and the junction box 4. The positive output end comprises a positive output plug 9, a positive output lead 10 is connected between the positive output plug 9 and the junction box 4, and a first anti-reverse diode 5 is connected between the positive input lead 8 and the positive output lead 10. The negative input end comprises a negative input plug 11, and a negative input lead 12 is connected between the negative input plug 11 and the junction box 4. The negative output end comprises a negative output plug 13, and a negative output lead 14 is connected between the negative output plug 13 and the junction box 4. And a second anti-reverse diode 6 is connected between the cathode input lead 12 and the cathode output lead 14. For convenience of installation, the positive input plug 7 is a female plug, the positive output plug 9 is a male plug, the negative input plug 11 is a male plug, and the negative output plug 13 is a female plug.
As an alternative embodiment, the battery piece 3 is a silicon-based thin film battery piece. The silicon-based thin film battery piece has great advantages in reducing the cost of photovoltaic power generation: (1) The silicon material has rich reserves (silicon is the second major element stored on the earth), and is non-toxic and pollution-free. And (2) the consumable material is less and the manufacturing cost is low. And (3) the large-area full-automatic continuous production is convenient to realize.
As an alternative embodiment, the cell piece 3 is a cadmium telluride thin film cell piece. The cadmium telluride thin film cell is called as CdTe cell for short, and is a thin film cell based on a heterojunction of p-type CdTe and n-type CdS. CdTe cells are photovoltaic devices formed by the sequential deposition of multiple thin films on a glass or other flexible substrate, a typical standard CdTe cell consisting of a five-layer structure: glass substrate: the solar cell bracket mainly plays a role in supporting a cell, preventing pollution and emitting sunlight; TCO layer: i.e. a transparent conductive oxide layer. The main functions are light transmission and electric conduction; cdS window layer: the n-type semiconductor and the p-type CdTe form a p-n junction; a CdTe absorption layer: the light absorption layer is a main body light absorption layer of the battery, and a p-n junction formed by the p-n junction and the n-type CdS window layer is the most core part of the whole battery; back contact layer and back electrode: in order to reduce the contact potential barrier between the CdTe and the metal electrode, current is drawn out, and the metal electrode and the CdTe form ohmic contact. The CdTe cell is much lower in production cost than solar cells made of crystalline silicon and other materials, has the most consistent spectrum with that of the sun, can absorb more than 95% of sunlight, and has the advantages of being recyclable after the life cycle is finished, capable of generating electricity by strong and weak light, good in performance when the temperature is higher and the like.
As an alternative embodiment, the battery piece 3 is a copper indium gallium selenide thin-film battery piece. The CIGSSe thin film battery sheet is a direct band gap compound semiconductor material consisting of metal elements such as copper, indium, selenium and the like, the absorption coefficient of the CIGSSe thin film battery sheet to visible light is the highest of all thin film battery materials, and the consumption of raw materials is far lower than that of the traditional crystalline silicon solar battery. Compared with a crystalline silicon solar cell with high efficiency and high cost and an amorphous silicon solar cell with low efficiency and low cost, the CIGSSe cell has multiple advantages of high efficiency, low cost and long service life, is a high-efficiency thin film solar cell which is most hopeful to reduce the photovoltaic power generation cost, can fully utilize abundant indium resources in China, and has wide development prospect.
In the description of the present invention, the terms "mounting", "connecting", "fixing", etc. should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be a mechanical or electrical connection; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements or through the interaction of two elements, and those skilled in the art will understand the specific meaning of the above terms in the present invention. Furthermore, the particular features, structures, etc. described in the examples can be included in at least one embodiment and, where not mutually inconsistent, can be combined by those skilled in the art. The protection scope of the present invention is not limited to the above specific embodiments, and according to the basic technical concept of the present invention, the embodiments that can be imagined without creative work by the ordinary skilled person in the art all belong to the protection scope of the present invention.
Claims (8)
1. A photovoltaic module is characterized by comprising a plurality of battery packs connected in series, an inverter (1) is connected between the battery pack at the head and the battery pack at the tail, each battery pack comprises a plurality of battery units (2) connected in parallel, each battery unit (2) comprises a battery piece (3), each battery piece (3) is provided with a junction box (4), each junction box (4) is provided with a positive input end, a positive output end, a negative input end and a negative output end, in two adjacent battery pieces (3) of one battery pack, the positive output end of the junction box (4) on one battery piece (3) is connected with the positive input end of the junction box (4) on the other battery piece (3), and the negative output end of the junction box (4) on one battery piece (3) is connected with the negative input end of the junction box (4) on the other battery piece (3); a first anti-reverse diode (5) and a second anti-reverse diode (6) are arranged in the junction box (4), the anode of the first anti-reverse diode (5) is connected with the anode input end, and the cathode of the first anti-reverse diode (5) is connected with the anode output end; the anode of the second anti-reverse diode (6) is connected with the negative input end, and the cathode of the second anti-reverse diode (6) is connected with the negative output end.
2. The photovoltaic module according to claim 1, characterized in that the positive input comprises a positive input plug (7), and a positive input lead (8) is connected between the positive input plug (7) and the junction box (4).
3. The photovoltaic module according to claim 1, characterized in that the positive output comprises a positive output plug (9), and a positive output lead (10) is connected between the positive output plug (9) and the junction box (4).
4. The photovoltaic module according to claim 1, characterized in that the negative input comprises a negative input plug (11), and a negative input lead (12) is connected between the negative input plug (11) and the junction box (4).
5. The photovoltaic module according to claim 1, wherein the negative output terminal comprises a negative output plug (13), and a negative output lead (14) is connected between the negative output plug (13) and the junction box (4).
6. The photovoltaic module according to claim 1, characterized in that the cell sheet (3) is a cadmium telluride thin film cell sheet.
7. The photovoltaic module according to claim 1, characterized in that the cell sheet (3) is a copper indium gallium selenide thin film cell sheet.
8. The photovoltaic module according to claim 1, characterized in that the cell sheet (3) is a silicon-based thin film cell sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223014282.XU CN218734188U (en) | 2022-11-11 | 2022-11-11 | Photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223014282.XU CN218734188U (en) | 2022-11-11 | 2022-11-11 | Photovoltaic module |
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| Publication Number | Publication Date |
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| CN218734188U true CN218734188U (en) | 2023-03-24 |
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| CN202223014282.XU Active CN218734188U (en) | 2022-11-11 | 2022-11-11 | Photovoltaic module |
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