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Integrated composite local conductive core plate and application thereof

A composite, conductive core technology, used in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor cost performance, difficult to achieve low-cost double-sided, and high unit price of low-temperature silver paste consumption. kWh cost and the effect of improving comprehensive power generation

Pending Publication Date: 2022-01-28
JIANGSU SUNPORT POWER CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently limited by the back packaging method, it is difficult to achieve low-cost double-sided
HIT batteries have the advantages of high conversion efficiency, low temperature coefficient, low attenuation, and good low-light performance. However, at present, the consumption of low-temperature silver paste and its unit price are relatively high, accounting for the highest proportion of BOM cost, and the cost performance is relatively poor.

Method used

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  • Integrated composite local conductive core plate and application thereof
  • Integrated composite local conductive core plate and application thereof
  • Integrated composite local conductive core plate and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment is a double-sided MWT-HIT battery assembly, which sequentially includes front ultra-clear high-transparency glass, front packaging polymer, front electrode, front TCO layer, front N+ type doped amorphous silicon layer, front Intrinsic amorphous silicon passivation layer, N-type single crystal silicon substrate, back intrinsic amorphous silicon passivation layer, back P-type doped amorphous silicon emitter layer, back TCO layer, back electrode ring, second back conductive Foil, second high-transparency insulating polymer on the back, first conductive foil on the back, color-changing film on the back, first high-transparency insulating polymer on the back, and ultra-clear high-transparency glass on the back. The fine grid pattern on the back of the battery has the same height as the front graphic, and the fine grid pattern on the back is only designed as a ferrule at the electrode point, forming a back electrode ring surrounding the positive electrode point...

Embodiment 2

[0042] On the other hand, the present invention simultaneously provides a process preparation method of a double-sided MWT-HIT battery assembly, the process preparation method comprising the following process steps:

[0043] S01 performs laser drilling on N-type silicon wafers;

[0044] S02 silicon wafer cleaning and polishing: texture and clean the N-type monocrystalline silicon substrate to remove the mechanical damage layer and pollutants on the surface of the silicon substrate to form a pyramid texture;

[0045] S03 depositing an intrinsic amorphous silicon layer on both sides;

[0046] N-type amorphous silicon deposition is performed on the front of S04;

[0047] P-type amorphous silicon deposition on the back of S05;

[0048] TCO deposition on the front side of S06;

[0049] TCO deposition on the back of S07;

[0050] On the back of S08, print etching paste around the position of the hole to partially etch the TCO and P-type amorphous silicon on the back;

[0051] S...

Embodiment 3

[0058] The present application also provides an integrated composite localized conductive core board. In order to ensure a clearer description of the embodiments of the present invention, the following description is made. by figure 2 For example, figure 2 The back view of the MWT-HIT battery. The integrated composite local conductive core board in the present invention is mainly in contact with the back of the MWT-HIT battery and laminated and packaged. Before the alignment contact lamination package needs to be in figure 2 Conductive glue is printed on the back negative pole and the back positive electrode ring respectively as shown in . The covering of each layer is then carried out in the following order.

[0059] 1. Covered by the second conductive foil on the back, the ring-shaped area in the second back conductive foil completely covers the positive electrode ring on the back, and conducts effective connection and conduction through the conductive glue on the pos...

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Abstract

The invention discloses an integrated composite local conductive core plate and application thereof, the integrated composite local conductive core plate comprises a second back conductive foil, a second back high-transmittance insulating polymer, a first back conductive foil and a first back high-transmittance insulating polymer which are sequentially arranged from top to bottom, and the second back conductive foil is provided with an annular area; a round hole is formed in the second back high-transmittance insulating polymer, and the back negative pole point is located in the center of the round hole; the first back conductive foil is a grid-shaped conductive circuit, and grid points of the grid-shaped conductive circuit and the back negative pole are bonded and conducted through a conductive adhesive at the top of the back negative pole; and the outer side surface of the first back conductive foil is covered with a first back high-transmittance insulating polymer. According to the cell module, the characteristics of low shading area and low silver consumption of the front surface of the MWT structure are brought into play to the back surface, the problem of high silver consumption in an industrial HIT cell is greatly relieved, and cost reduction and efficiency improvement of the industrial HIT cell can be facilitated by matching with a superfine grid technology.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic module production, and in particular relates to a double-sided MWT-HIT battery module and its application. Background technique [0002] The MWT battery has a back contact structure. Since there is no busbar on the front, it can effectively reduce the shading area and greatly reduce the consumption of silver paste. And compared with other back contact structures such as IBC, the process is simple and low cost, and has better cost performance. However, currently limited by the back packaging method, it is difficult to achieve low-cost double-sided. HIT batteries have the advantages of high conversion efficiency, low temperature coefficient, low attenuation, and good low-light performance. However, at present, the consumption of low-temperature silver paste and its unit price are relatively high, accounting for the highest proportion of BOM cost, and the cost performance is relatively poor. ...

Claims

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Application Information

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IPC IPC(8): H01L31/02H01L31/075
CPCH01L31/02008H01L31/075Y02E10/548
Inventor 吴仕梁王飞王伟张凤鸣刘晓瑞罗西佳王浩
Owner JIANGSU SUNPORT POWER CORP LTD
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