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MWT (Metal Wrap-Through) solar cell assembly and manufacturing method thereof

A technology of solar cell components and manufacturing methods, applied in the field of solar cells, can solve problems such as short circuit, high cost of component line equipment, and no verification

Active Publication Date: 2014-07-02
淮安捷泰新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole assembly process adopts a fully automatic method, but the equipment cost of the assembly line is quite high. The most important thing is that there are some hidden dangers in this production method: 1. Generally, a layer of insulation layer is required, which is a problem under long-term working conditions. 2. This method of integrating the conductive foil that is in contact with the solar cell electrodes into the backsheet material has not been verified, and there is a problem of whether it can maintain stability during long-term work; 3. The use of conductive adhesive and This method of solar cell electrode connection is not yet widely accepted

Method used

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  • MWT (Metal Wrap-Through) solar cell assembly and manufacturing method thereof
  • MWT (Metal Wrap-Through) solar cell assembly and manufacturing method thereof
  • MWT (Metal Wrap-Through) solar cell assembly and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] As shown in Figure 2, a method for manufacturing a MWT solar cell module provided in this embodiment includes the following steps:

[0097] (1) Preparation of MWT solar cells

[0098] The backside electrode pattern of the cell has been rationally designed so that the patterns of the emitter electrode and the base electrode are suitable for ribbon welding, such as Figure 2a As shown, the center line of the emitter electrode and the base electrode of the battery is on a straight line, wherein the emitter electrode and the base electrode are aligned on the straight line, the shape of the emitter electrode and the base electrode is a continuous strip, and the pattern of the back electrode Reasonable design specifically includes:

[0099] a. The number of electrodes of the same polarity (that is, the number of emitter electrodes or base electrode busbar lines) ranges from 2 to 10;

[0100] b The shape of the emitter electrode or the base electrode can be continuous or dis...

Embodiment 2

[0113] A method for manufacturing a MWT solar cell assembly provided in this embodiment includes the following steps:

[0114] (1) Preparation of MWT solar cells

[0115] The backside electrode pattern of the cell has been rationally designed so that the patterns of the emitter electrode and the base electrode are suitable for ribbon welding, such as Figure 3a As shown, the center lines of the emitter and base electrodes of the battery are not in a straight line, the emitter electrodes and the base electrodes are parallel to each other, the shape of the emitter electrode and the base electrode is a continuous strip, and the rational design of the back electrode pattern is specific include:

[0116] a. The number of electrodes of the same polarity (that is, the number of emitter electrodes or base electrode busbar lines) ranges from 2 to 10;

[0117] b The shape of the emitter electrode or the base electrode can be continuous or discontinuous, and the shape of the emitter el...

Embodiment 3

[0130] A method for manufacturing a MWT solar cell assembly provided in this embodiment includes the following steps:

[0131] (1) Preparation of MWT solar cells

[0132] The backside electrode pattern of the cell has been rationally designed so that the patterns of the emitter electrode and the base electrode are suitable for ribbon welding, such as Figure 4a As shown, the center lines of the emitter electrode and the base electrode of the battery are not on a straight line, the emitter electrode and the base electrode are parallel to each other, and the shape of the emitter electrode is a disconnected strip. The emitter electrode in this embodiment The shape is a two-stage strip body, and the reasonable design of the back electrode pattern specifically includes:

[0133] a. The number of electrodes of the same polarity (that is, the number of emitter electrodes or base electrode busbar lines) ranges from 2 to 10;

[0134] b The shape of the emitter electrode or the base e...

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Abstract

The invention discloses an MWT (Metal Wrap-Through) solar cell assembly, comprising glass, EVAs (Ethylene-vinyl Acetate Copolymers) and a back plate material, and further comprising a series-welding cell sheet. The glass, the EVA, the series-welding cell sheet, the EVA, and the back plate material are sequentially arranged and are laminated and packed to form an MWT solar cell assembly; the series-welding cell sheet consists of a plurality of sequentially arranged MWT solar cell sheets, wherein an emitter electrode and a base electrode are arranged on the back surface of each MWT solar cell sheet, the emitter electrodes and the base electrodes of the adjacent MWT solar cell sheets are connected in series through a welding strip, the emitter electrodes and the base electrodes of the series-welding cell sheet are led out by the welding strips, and the patterns of the emitter electrodes and the base electrodes are matched with shapes of the welding strips. The invention further discloses a manufacturing method of the MWT solar cell assembly; and through the manufacturing method of the MWT solar cell assembly, the manufacturing process of assemblies of the MWT solar cell is simple and reliable, the cost is low, the compatibility is good, and the technical advantages of the MWT solar cell are fully exerted.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a MWT solar cell component and a manufacturing method thereof. Background technique [0002] The basic structure of a traditional crystalline silicon solar cell is as follows from the front to the back: emitter electrode, anti-reflection film, emitter, base area, back surface field, and base area electrode. According to the division of functions, the electrodes of solar cells can be divided into two types: one is the collecting electrode, which is used to collect the current generated by the solar cell due to the photovoltaic effect; the other is the lead-out electrode, which is used to connect the solar cell to external devices. For traditional solar cells, the lead-out electrode of the emitter is the busbar, and the lead-out electrode of the base region is the base electrode. The emitter and the lead-out electrodes of the base region are respectively arranged on the two s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/05H01L31/048H01L31/18H01L31/049
CPCY02E10/50Y02P70/50
Inventor 金井升许佳平黄纪德蒋方丹陈良道
Owner 淮安捷泰新能源科技有限公司