Low-temperature light-reflecting solder strip
A reflective ribbon and low-temperature technology, which is applied in the field of solar photovoltaic power generation, can solve the problems of uneven distribution, damage, and high scrap rate of the tin plating layer, and achieve the effects of improving the light scattering effect, increasing the firmness, and improving the solderability
Inactive Publication Date: 2015-12-02
SUZHOU TONYSHARE ELECTRONICS MATERIALS TECH
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Problems solved by technology
There are many structures of existing reflective ribbons, but the divergence effect of light is not ideal; the power generation efficiency is low
Generally, the surface of the reflective soldering tape needs to be provided with a tin-plated layer, but the composition of the current tin-plated layer is defective, resulting in a high scrap rate in the tin-plating process, and the distribution of the tin-plated layer on the surface of the copper substrate is uneven, and it is not easy to be firmly attached to the copper substrate to combine
Furthermore, the existing reflective ribbons are not easy to store, and are easily damaged and invalidated by environmental influences
Method used
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[0012] Such as figure 1 As shown, a low-temperature reflective welding strip, which includes a copper substrate, the upper surface of the copper substrate 1 is provided with a plurality of regular quadrangular prisms 11, and the plurality of regular quadrangular prisms 11 are arranged in an array; adjacent regular quadrangular prisms The bottoms of 11 are closely connected; the regular square prism 11 and the copper substrate 1 have an integrated structure; the surface of the regular square prism 11 is provided with an alloy layer 2; the alloy layer 2 includes 60% Sn by mass fraction, 2% Ag and 38% Bi.
[0013] This embodiment adopts the regular quadrangular truss structure arranged in an array, which not only increases the firmness, but also greatly improves the light scattering effect of the welding ribbon itself, so that the utilization rate of light of the solar cell module is improved, and the power generation efficiency is comparable to the original 20% increase on some...
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The invention provides a low-temperature light-reflecting solder strip, which comprises a copper substrate. The upper surface of the copper substrate is provided with a plurality of regular quadrangular frustums. The plurality of regular quadrangular frustums are arranged in an array. The regular quadrangular frustums and the copper substrate are of an integral structure. The surface of each regular quadrangular frustum is provided with an alloy layer and the alloy layer comprises 59-61% of Si, 1-3% of Ag and Bi as the balance in mass percentage. The structure of the low-temperature light-reflecting solder strip is composed of regular quadrangular frustums arranged in an array. In this way, not only the firmness is improved, but also the light scattering effect of the low-temperature light-reflecting solder strip is greatly improved. Therefore, the light utilization rate of a solar cell module is increased, and the power generation efficiency is improved by 20% on the original basis. The welding temperature of the alloy layer of the low-temperature light-reflecting solder strip is smaller than 150 DEG C, so that the light-reflecting solder strip can meet the requirements of the low-temperature process. The solderability and the fluidity of the light-reflecting solder strip are improved, and the light-reflecting solder strip is high in electrical conductivity.
Description
technical field [0001] The invention relates to the field of solar photovoltaic power generation, in particular to a low-temperature reflective welding ribbon. Background technique [0002] Existing solar cell modules generally include a plurality of solar cells connected by reflective ribbons. The reflective ribbon can reduce the shading part on the surface of the cell and improve the conversion efficiency of power generation. There are many existing reflective ribbon structures, but the divergence effect on light is not ideal; the power generation efficiency is low. Generally, the surface of the reflective soldering tape needs to be provided with a tin-plated layer, but the composition of the current tin-plated layer is defective, resulting in a high scrap rate in the tin-plating process, and the distribution of the tin-plated layer on the surface of the copper substrate is uneven, and it is not easy to be firmly attached to the copper substrate combined. Furthermore, t...
Claims
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IPC IPC(8): H01L31/05H01L31/054C22C13/02
CPCY02E10/52H01L31/0508C22C13/02H01L31/0512H01L31/0547
Inventor 陆利斌宋建源
Owner SUZHOU TONYSHARE ELECTRONICS MATERIALS TECH