Double-side photovoltaic assembly

A photovoltaic module, double-sided technology, applied in the field of double-sided photovoltaic modules, can solve the problems of reducing the service life of components, hot spot effect, and reducing the service life of components, so as to reduce the impact of power generation, improve the power of the back side, and improve the use of The effect of longevity

Pending Publication Date: 2019-02-01
LONGI GREEN ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For double-sided photovoltaic modules, if the junction box or nameplate is placed on the back of the double-sided photovoltaic module, it will form back shading, resulting in a reduction in power generation on the back of the module, and in severe cases, hot spot effects will occur, reducing the service life of the module
In order to avoid the reduction of the service life of the components caused by the hot spot effect, in the prior art, junction boxes or nameplates are placed near the frame of the photovoltaic components. figure 1 Take the junction box as an example to illustrate
Although the above solution can avoid the back cover, because the junction box or nameplate occupies a large amount of blank area, the cost of glass, packaging materials, frame and other materials is increased. Overall Photoelectric Conversion Efficiency

Method used

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Examples

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Embodiment 1

[0056] The present disclosure provides a double-sided photovoltaic module, including: at least one battery string group, a bypass diode connected in parallel with the corresponding battery string group, and a shield fixed on a backplane;

[0057] The battery string group is composed of battery strings connected in parallel, and the battery string is composed of battery pieces in series;

[0058] The battery slices that are at least partly shielded by the shielding object are shielded battery slices, and the battery string containing the shielded battery slices is the shielded battery string;

[0059] The number of shielded battery slices in each shielded battery string is greater than or equal to 2.

[0060] Preferably, the shaded area of ​​each shaded cell is less than or equal to 50% of the total area of ​​the back of the corresponding shaded cell. In this way, the shaded cells can still generate electricity, while avoiding all the shaded cells being blocked and becoming load power ...

Embodiment 2

[0099] Based on the two-sided photovoltaic module described in the embodiment, a specific embodiment of the present disclosure is Picture 12 As shown, the double-sided photovoltaic module includes 6 battery strings, from left to right, A, B, C, D, E, F, each battery string is composed of 76 double-sided battery slices, each battery The length of the slice is 156.75mm, the width is 26.125mm, the shape of the battery slice is rectangle or rounded rectangle, and the rounded rectangle has rounded corners of 1, 2, 3 or 4. The overlapping distance of adjacent battery slices is 1 mm. The junction box 6 is installed at the dotted box,

[0100] The two ends of the long battery string ABCDEF are respectively connected to the bus bar 2 at both ends of the assembly through the welding ribbon 1; the bus bar 2 is connected to the bypass diode in the junction box 6 through the lead wire. The long battery string ABCDEF is composed of two short strings, and the short strings are connected by we...

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Abstract

The invention provides a double-side photovoltaic assembly, and relates to the technical field of photovoltaic assemblies. The double-side photovoltaic assembly comprises at least one battery group, abypass diode connected with corresponding battery groove in parallel, and a shield fixed on a backboard; each battery group is composed of batteries in parallel connection, and each battery is composed of cells in serial connection; at least part of the cells shielded by the shield are shielded cells; the battery with the shielded cells is a shielded battery; and the number of the shielded cellsin each shielded battery is greater than or equivalent to 2. Via the double-side photovoltaic assembly, influence of back-side shading on the generating capacity can be reduced, result caused by a hotspot effect can be slowed, and the service life of the assembly is prolonged.

Description

[0001] This application requires that it be submitted to the Chinese Patent Office on February 10, 2018, the application number is 201820239186X, the application name is "Double-sided photovoltaic laminated module to avoid hot spot effect" and the application number is 2018101386163, the application name is "Avoid heat generation The priority of the Chinese patent application of "spot effect double-sided photovoltaic laminated module", the entire content of which is incorporated in this application by reference. Technical field [0002] The present disclosure relates to the technical field of solar photovoltaic modules, in particular to a double-sided photovoltaic module. Background technique [0003] A solar cell is a device that uses the photovoltaic effect to directly convert light energy into direct current. The most common of these are crystalline silicon solar cells, including monocrystalline silicon solar cells and polycrystalline silicon solar cells. Solar cells are usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/044H02S40/20
CPCH01L31/044H02S40/20Y02E10/50
Inventor 郑直焦方凯胡栋王新
Owner LONGI GREEN ENERGY TECH CO LTD
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