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Inter-assembly joint structure of photovoltaic string and photovoltaic string structure

A photovoltaic module and photovoltaic group technology, applied in the field of solar energy, can solve the problems of large power generation performance loss of the system, and achieve the effect of reliable connection and mature technology

Pending Publication Date: 2021-07-13
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] see figure 2 As shown, in the conventional photovoltaic string structure, when a certain photovoltaic module 1 is damaged, the mismatch can only be generated by turning on the bypass diode, so as to maintain the operation of the remaining intact photovoltaic modules 1 under the string at a lower efficiency. The power generation performance loss of the system is relatively large

Method used

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  • Inter-assembly joint structure of photovoltaic string and photovoltaic string structure
  • Inter-assembly joint structure of photovoltaic string and photovoltaic string structure
  • Inter-assembly joint structure of photovoltaic string and photovoltaic string structure

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Effect test

Embodiment 1

[0037] see image 3 As shown, the present invention provides a photovoltaic string structure, including several photovoltaic modules 1; several photovoltaic modules 1 are connected in series to form a photovoltaic string 2.

[0038] A photovoltaic string with a series-parallel structure in the present invention includes at least two photovoltaic strings 2 .

[0039] The photovoltaic modules 1 in a photovoltaic string 2 are connected in parallel with the corresponding photovoltaic modules 1 in the adjacent photovoltaic string 2 to form a photovoltaic string structure in which all photovoltaic modules are connected in series and in parallel.

[0040] In the present invention, the photovoltaic module 1 can use any solar cell, for example: GaAs single-junction solar cell, single-junction dye-sensitized solar cell, single-junction silicon thin film solar cell, crystalline silicon solar cell, cadmium telluride solar cell and copper indium gallium Selenium solar cells, etc.

[0041...

Embodiment 2

[0043] The photovoltaic modules 1 are connected to each other by direct welding with wires or conventional quick plug connection; however, when a photovoltaic string structure of the present invention is adopted, the adjacent photovoltaic modules 1 of the adjacent photovoltaic strings 2 need to be connected in parallel, if If the wire welding method is used, the welding between the wires will be involved, the process is not easy to realize, and the reliability is not high.

[0044] The direct insertion of the conventional quick plug MC4 male head and the MC4 female head realizes the connection conduction, but it is also used to realize the communication between the two wires. A photovoltaic string structure of the present invention requires photovoltaic modules 1 to be connected both in series and in parallel, which involves the connection between four wires, and there is no reliable solution in the prior art.

[0045] In order to solve these technical problems, the present in...

Embodiment 3

[0053] Embodiment 3 differs from Embodiment 2 in that the first parallel connection port 303 and the second parallel connection port 304 are replaced by MC4 connectors.

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Abstract

The invention discloses an inter-assembly joint structure of a photovoltaic string and a photovoltaic string structure. The inter-assembly joint structure comprises a double-sided plug, a third joint and a fourth joint. The double-sided plug comprises a first joint, a second joint and two parallel wiring ports; the first joint, the second joint and the two parallel wiring ports are arranged in a cross shape; the first joint and the second joint are electrically connected with conductors in the two parallel wiring ports to form a four-way structure; the first joint and the third joint are matched and inserted for use; the second joint and the fourth joint are matched and inserted for use; and the first connector, the second connector, the third connector and the fourth connector are MC4 connectors. Through the double-sided plug designed by the invention, series-parallel connection between photovoltaic modules can be quickly realized through quick plugging, and when only parallel connection / series connection is needed, the change of a connection structure can be quickly realized by unplugging the corresponding plug.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and in particular relates to a joint structure between components of a photovoltaic string and a photovoltaic string structure. Background technique [0002] 76% of my country's land is full of sunlight, and the distribution of light energy resources is relatively uniform. Photovoltaic power generation has no noise and pollutant emissions. The application technology is mature, safe and reliable. Solar energy is the cleanest, safest and most reliable energy source in the future. Developed countries are taking the development and utilization of solar energy as the main content of the long-term planning of the energy revolution. The photovoltaic industry is increasingly becoming another explosive development industry after the IT and microelectronics industries in the world. [0003] Photovoltaic modules for photovoltaic power generation are composed of high-efficiency crystalline silicon solar...

Claims

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Application Information

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IPC IPC(8): H02S40/36H01R24/00
CPCH01R24/00H02S40/36Y02E10/50
Inventor 高虎彭文博李晓磊田鸿翔郑建涛
Owner HUANENG CLEAN ENERGY RES INST
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