Manufacturing method of metallization wrap-through (MWT) battery

A manufacturing method and battery technology, applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve the problems of light receiving area loss, low photoelectric conversion efficiency, etc.

Inactive Publication Date: 2013-03-06
TRINASOLAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional solar cells are limited by their front electrodes and are prone to loss of a

Method used

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  • Manufacturing method of metallization wrap-through (MWT) battery
  • Manufacturing method of metallization wrap-through (MWT) battery
  • Manufacturing method of metallization wrap-through (MWT) battery

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Embodiment Construction

[0021] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same numbers will be used throughout the drawings to refer to the same or like parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the description of the present invention may be selected by the applicant according to his or her judgment, and the detailed meanings thereof are set forth herein described in the relevant section of the description. Furthermore, it is required that the present invention be understood not only by the actual terms used, but also by the meaning implied by each term.

[0022] figure 1 A flowchart schematically showing the main steps of the manufacturing method of the M...

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Abstract

The invention provides a manufacturing method of a metallization wrap-through (MWT) battery, and the manufacturing method comprises the following steps of symmetrically perforating a silicon chip so as to acquire a plurality of through holes which are symmetrically distributed in the silicon chip; carrying out the diffusion technique on the silicon chip; scribing the surface of the diffused silicon chip according to the through holes so as to divide the silicon chip into a plurality of sub-cells, and ensuring that each sub-cell comprises a through hole; printing a front electrode on the front surface of the silicon chip; printing an aluminum back surface field on the back surface of the silicon chip; and printing a connecting electrode on the back surface of the silicon chip, and making the sub-cells mutually connected with each other in series in the longitudinal direction and mutually connected with each other in parallel in the transverse direction, wherein the front electrode is communicated with the connecting electrode through the through hole. According to the manufacturing method of the MWT battery, one silicon battery chip is physically divided into a plurality of sub-cells, and the sub-cells are connected with one another in series or in parallel, so that the efficiency bottleneck caused by the nonuniformity of material impurities and nonuniformity in diffusion can be reduced.

Description

technical field [0001] The invention relates to the field of solar cell manufacturing, in particular to a method for manufacturing MWT (Metallisation Wrap-Through, metal perforated winding) cells. Background technique [0002] When non-renewable energy sources such as electricity, coal, and oil are running out frequently, and energy issues have increasingly become a bottleneck restricting the development of the international society and economy, more and more countries have begun to implement the "Sunshine Plan" to develop solar energy resources and seek new impetus for economic development. The solar cell manufacturing industries of various countries are scrambling to invest huge sums of money and expand production in order to compete for a place. [0003] The photoelectric conversion efficiency of a solar cell is closely related to the light-receiving area of ​​the front surface of the cell. Traditional solar cells are limited by their front electrodes and are prone to lo...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 王书博
Owner TRINASOLAR CO LTD
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