Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of double-sided MWT-HIT battery assembly

A battery module, double-sided technology, applied in electrical components, circuits, photovoltaic power generation and other directions, 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, to reduce consumption, reduce kWh cost and the effect of improving comprehensive power generation

Active Publication Date: 2021-10-29
JIANGSU SUNPORT POWER CORP LTD
View PDF4 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of double-sided MWT-HIT battery assembly
  • Preparation method of double-sided MWT-HIT battery assembly
  • Preparation method of double-sided MWT-HIT battery assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 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

[0070] 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:

[0071] S01 performs laser drilling on N-type silicon wafers;

[0072] 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;

[0073] S03 depositing an intrinsic amorphous silicon layer on both sides;

[0074] N-type amorphous silicon deposition is performed on the front of S04;

[0075] P-type amorphous silicon deposition on the back of S05;

[0076] TCO deposition on the front side of S06;

[0077] TCO deposition on the back of S07;

[0078] 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;

[0079] S...

Embodiment 3

[0086] 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.

[0087] 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a double-sided MWT-HIT battery assembly. The battery assembly comprises front ultra-white high-transmittance glass, a front packaging polymer, a front electrode, a front TCO layer, a front N + type doped amorphous silicon layer, a front intrinsic amorphous silicon passivation layer, an N type monocrystalline silicon substrate, a back intrinsic amorphous silicon passivation layer, a back P type doped amorphous silicon emission layer, a back TCO layer, a back positive electrode ring, an integrated composite local conductive core plate and a back ultra-white high-transmittance glass which are sequentially distributed from top to bottom. According to the battery assembly disclosed by the invention, the characteristics of low shading area and low silver consumption of the front surface of an MWT structure are exerted on the back surface, the problem of high silver consumption in an industrial HIT battery is greatly relieved, and cost reduction and efficiency improvement of the industrial HIT battery can be facilitated by means of 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 preparation method of a double-sided MWT-HIT battery module. 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048H01L31/0224H01L31/0747H01L31/20
CPCH01L31/0488H01L31/02245H01L31/022433H01L31/0747H01L31/202Y02E10/50Y02P70/50
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com