Connector between photovoltaic elements, photovoltaic element group and photovoltaic system

Abstract

The invention discloses a connector used between photovoltaic elements, which comprises a conductive thin wire and a fixing film, the conductive thin wire can be electrically connected with the conductive surface of the photovoltaic element, and the fixing film fixes the conductive thin wire on the conductive surface of the photovoltaic element in a manner of covering, bonding, partially wrappingor partially embedding the conductive thin wire into the fixing film. The invention further discloses a photovoltaic element group which comprises a first photovoltaic element, a second photovoltaic element and the connector. The invention finally discloses a photovoltaic system, which comprises the photovoltaic element groups, a plurality of photovoltaic element groups forms a photovoltaic element string, and after the photovoltaic element string is packaged by adopting an adhesive film and glass, current is led out through a photovoltaic welding strip. According to the connector used betweenthe photovoltaic elements, the photovoltaic element group and the photovoltaic system provided by the invention, the cost can be reduced, the series resistance is reduced, the shading loss is reduced, the service lives of the elements and the system are prolonged, and the subfissure of the photovoltaic elements and the power loss and reliability risk caused by the subfissure of the photovoltaic elements are reduced.

Description

technical field [0001] The invention relates to a connector between photovoltaic elements, a photovoltaic element group and a photovoltaic system, and belongs to the field of semiconductor and photovoltaic product manufacturing. Background technique [0002] The working principle of photovoltaic power generation is to absorb and generate electrons and holes that meet the requirements of photons incident into the photovoltaic element body, collect them through the PN junction of the photovoltaic element, and then output them from the electrodes that form ohmic contacts with the two ends of the PN junction of the photovoltaic element to generate current. It is crucial for all photovoltaic products to generate efficient and reliable electrical interconnections between photovoltaic elements and maximize the current they generate. A high-efficiency interconnection method between photovoltaic elements not only requires good electrical conductivity, but also reduces its shading of...

AI Technical Summary

Problems solved by technology

First, such screen-printed grid electrodes are usually made of silver, which forms a strong contact with silicon, is chemically stable, and conducts electricity well, which creates expensive material costs

Especially for photovoltaic cells that require the use of low-temperature silver paste and other double-sided photovoltaic elements that require double-sided grid electrodes, the cost of materials is higher

And this also limits the development of these products to a certain extent, even though they often have better performance

The photovoltaic system formed by this method also often faces some problems, such as the acidic substances generated by the aging of the system packaging material are easy to diffuse to the surface of the photovoltaic element, destroying the conductivity of the metallized electrode or the passivation effect of the passivation structure

In addition, this method has other disadvantages, such as shading loss due to thick busbars, and alignment of the solder strips, otherwise misalignment and white leakage will affect component performance or appearance, etc.

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