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Group string connection structure possessing transparent electrode crystalline silicon photovoltaic cell

A photovoltaic cell and transparent electrode technology, which is applied in the field of solar cells, can solve the problems of small space and achieve the effects of reducing usage, increasing the area that can generate electricity, and convenient combination and connection

Inactive Publication Date: 2016-07-20
LONGI SOLAR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the space for this technology to further improve the performance of components is getting smaller and smaller, and it is possible to realize it only by cooperating with new battery technologies.

Method used

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  • Group string connection structure possessing transparent electrode crystalline silicon photovoltaic cell
  • Group string connection structure possessing transparent electrode crystalline silicon photovoltaic cell
  • Group string connection structure possessing transparent electrode crystalline silicon photovoltaic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Classify monocrystalline silicon cells according to grades. The cells are of M2 specification. The front and back electrodes of the cells are transparent conductive film-metal composite electrodes. The number of grid lines is 40, the line width is 30um, and the line length is 2mm.

[0062] (2) Make thin copper wires on the transparent conductive film-metal composite electrodes of the battery sheet. The diameter of the copper wires is 50um, and the number is 30. The thin copper wires intersect vertically with the metal thin grid wires of the composite electrodes, and are welded in series In the process, laser welding is used to vertically bond together, and at the same time, the front and back of adjacent cells are connected in series. Every 10 battery slices are connected in series through thin copper wires to form a battery string, and every 6 battery strings are connected in series through welding ribbons.

[0063] (3) Laminate in the order of photovoltaic glass,...

Embodiment 2

[0069] (1) Classify the monocrystalline silicon cells according to grades. The cell is of M2 specification. The front electrode of the cell is a transparent conductive film-metal composite electrode, and the back electrode is a metal electrode. On the transparent conductive film is a group of parallel equidistant metal fine grid lines, the number is 30, the line width is 50um, and the line length is 50mm.

[0070] (2) Cut the M2 cell into two halves;

[0071] (3) The half-cell strings are laminated in the order of TPA, EVA, polymer containing copper wire, battery string, polymer containing copper mesh, EVA, and photovoltaic glass. The diameter of the copper wire is 100um, and the number is 15.

[0072] (4) Use a laminator for lamination at 150°C to cross-link the EVA and package the battery strings, photovoltaic glass and TPA into a whole. The low-melting-point metal attached to the copper wire is combined with the metal fine grid on the conductive film, and at the same time...

Embodiment 3

[0077] (1) Classify the monocrystalline silicon cells according to grades. The cell is of M2 specification. The front electrode of the cell is a transparent conductive film-metal composite electrode, and the back electrode is a metal electrode. Metal electrodes with a circular pattern on the transparent conductive film have a diameter of 100um, and the distance between the geometric centers of adjacent patterns is 2mm.

[0078] (2) The cell strings are stacked in the order of TPA, EVA, polymer containing copper wires, battery strings, polymer containing copper mesh, EVA, and photovoltaic glass. The diameter of the copper wire is 100um, and the number is 15.

[0079] (3) Use a laminator to carry out lamination treatment at 150°C to cross-link the EVA and package the battery string, photovoltaic glass and TPA into a whole. The low-melting-point metal attached to the copper wire is combined with the metal electrodes on the conductive film, and at the same time connects the front...

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Abstract

The invention discloses a group string connection structure possessing a transparent electrode crystalline silicon photovoltaic cell. The structure comprises at least two cell sheets. A front side electrode of each cell sheet is a transparent conductive film-metal combination electrode. A back side electrode is the transparent conductive film-metal combination electrode or a back side metal electrode. The adjacent cell sheets are connected by connecting the front side electrodes and the back side electrodes through a Z-shaped fine metal lead so that the front sides and the back sides of the adjacent cell sheets are connected in series. The right side and / or back side electrodes forming a photovoltaic assembly adopt the transparent conductive film-metal combination electrode. By using a cell group string, an application amount and a shading area of a silver electrode are greatly reduced and simultaneously conductivity of the assembly is increased.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a string connection structure of crystal silicon photovoltaic cells with transparent electrodes. Background technique [0002] Since the first solar cell was born in Bell Laboratories in 1954, crystalline silicon solar cells have been widely used, the conversion efficiency has been continuously improved, and the production cost has continued to decline. At present, crystalline silicon solar cells account for more than 80% of the total global solar cell market, and the conversion efficiency of the production line of components has exceeded 20%. It is expected to be flat in the next few years. As a clean energy source, crystalline silicon solar cells play an increasingly important role in changing the energy structure and alleviating environmental pressure. [0003] Crystalline silicon modules are the core terminal units of photovoltaic power generation, and their conversion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/048H01L31/05
CPCY02E10/50H01L31/0516H01L31/022441H01L31/022466H01L31/0488H01L31/0508
Inventor 钟宝申李华赵科雄
Owner LONGI SOLAR TECH CO LTD
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