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Photovoltaic cell with frontside busbar tape on narrow front busbars

A technology of photovoltaic cells and busbars, applied in photovoltaic power generation, circuits, electrical components, etc., can solve the problem of non-renewable fuel and achieve the effect of reducing consumption and firm connection

Inactive Publication Date: 2018-05-01
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today, although fossil fuels provide the vast majority of energy consumption, these fuels are non-renewable

Method used

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  • Photovoltaic cell with frontside busbar tape on narrow front busbars
  • Photovoltaic cell with frontside busbar tape on narrow front busbars
  • Photovoltaic cell with frontside busbar tape on narrow front busbars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0386] Solvent-based epoxy thermosetting adhesives were prepared using the materials listed in Table 2, where the amount of each ingredient is expressed as weight percent (wt %) based on the total adhesive weight. The Epon SU-2.5 epoxy resin was heated to 60°C prior to compounding. The Batch 1 ingredients were added in the order listed in Table 2 and the combined Batch 1 materials were mixed vigorously for 1 hour using a Cowles type mixer. A second batch of MEK was then added slowly with mixing, and the resulting mixture was mixed gently for 5 minutes. The binder mixture was then filtered through a 100 micron filter.

[0387] Table 2: Epoxy adhesives with core-shell particles .

[0388] batch

[0389]The adhesive mixture was further filtered through a 30 micron filter and then coated onto a 21.25 inch wide, 12 micron thick copper foil ("TOB-III", available from Oak Mitsui, Camden, South Carolina). , SC)) on the primed surface (matt surface). The line speed of t...

Embodiment 2

[0393] Solvent-based epoxy thermoset adhesives were prepared using the materials listed in Table 3, where the amount of each ingredient is expressed as weight percent based on the total adhesive weight. The Epon SU-2.5 epoxy resin was heated to 60°C prior to compounding. Batch 1 materials were combined and mixed by hand until a homogeneous mixture was obtained. Batch 2 material (epoxy hardener) was then added and mixed by hand until the material was homogeneous. Next, add batch 3 ingredients. The fumed silica in Batch 3 was added in nine additions with extensive hand mixing after each addition, and the solvent was also added in three additions with extensive hand mixing. After addition of batch 4 solvent, a thick creamy material was obtained. The mixture was then mixed with a high speed Cowles type mixer. After thorough mixing, batch 5 solvent was added which brought the percent solids down to about 40%. The mixture was then filtered through a 100 micron filter. The adhe...

Embodiment 3

[0397] The same copper foil was used as described in Example 1. Solvent-based adhesives were prepared using the ingredients listed in Table 4, where the amount of each ingredient is expressed as a weight percent based on the total adhesive weight.

[0398] The preparation method of acrylic resin is as follows: methyl acrylate, butyl acrylate, glycidyl methacrylate, a mixture of ethyl acetate and isopropanol at a weight ratio of 97:3, and VAZO-67 at 80 / 15 / 5 The weight ratio of / 149.8 / 0.2 was mixed in a 500mL three-necked flask, and a pneumatic agitator (ZD-J-1 type, Shanghai Zoda Coating Equipment Co., Ltd., China) was used under a nitrogen atmosphere. )) was stirred at a temperature of 60° C. for 24 hours. The mixture was then cooled to give a pale yellow clear viscous liquid (comprising 40% solids content). The viscous liquid was used without further treatment.

[0399] Araldite MT35600 (Huntsman, The Woodlands, TX) was obtained as a solid resin and dissolved in sufficient...

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Abstract

The present disclosure relates to photovoltaic ("PV") solar cell comprising a frontside busbar tape in electrical contact with narrow front busbars (e.g., silver busbars). A single frontside busbar tape may be in electrical contact with a single narrow front busbar or with a dual set of narrow front busbars. The disclosure also relates to modified gridlines and methods of enhancing the electricalconnection between gridlines and narrow busbars and busbar tape on a solar PV cell.

Description

[0001] The present disclosure relates to photovoltaic ("PV") solar cells that include front side bus tape in electrical contact with narrow front bus bars (eg, silver bus bars). Single Facade Bus Tape can make electrical contact with single narrow front busbars or with double narrow front busbar groups. The present disclosure also relates to improved gridlines and methods of enhancing the electrical connection between gridlines and narrow busbars and busbar tape on solar photovoltaic cells. Background technique [0002] Renewable energy is energy derived from renewable natural resources such as sunlight, wind, rain, tides and geothermal heat. As technology advances and the global population grows, the demand for renewable energy has increased dramatically. Today, although fossil fuels provide the vast majority of energy consumption, these fuels are non-renewable. The global dependence on these fossil fuels brings not only concerns about their depletion, but also environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/02H01L31/05H01L31/0224
CPCH01L31/022425H01L31/022433Y02E10/50H01L31/0512
Inventor 纳尔逊·T·罗托
Owner 3M INNOVATIVE PROPERTIES CO
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