Preparation method of solar photovoltaic module

A solar photovoltaic and component technology, applied in the field of solar photovoltaic, can solve reliability problems and other problems, and achieve the effects of increasing output power, reducing packaging loss, and reducing edge stress

Pending Publication Date: 2021-08-13
CHANGZHOU SHICHUANG ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes a method for preparing a solar photovoltaic module, which can not only solve the component reliability problem of the existing solar photovoltaic module due to the bending of interconnection strips, but also solve the problem of current mismatch of interconnection components on the same side. Encapsulation loss, improving the output power and encapsulation efficiency of solar photovoltaic modules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] In view of this, the present invention provides a kind of preparation method of solar photovoltaic module, specifically comprises the following steps:

[0046] (1) Obtain the first battery and the second battery with different areas but the same current;

[0047] (2) Arrange the electrodes of the first battery and the second battery in reverse intervals, use the upper interconnection bar to connect the electrodes on the same side of the first battery and the second battery, and use the lower interconnection bar to connect the second battery to the next phase The adjacent first battery is connected to the electrode on the other side, and so on, the first battery and the second battery are connected in series on the same side to form a battery string;

[0048] (3) Multiple battery strings are connected in series / parallel to form a battery module;

[0049] (4) Laminate the glass, upper adhesive film, battery module, lower adhesive film and glass / back sheet in order from t...

Embodiment 1

[0057] A method for preparing a solar photovoltaic module, specifically comprising the steps of:

[0058] (1) Obtain the first battery and the second battery with different areas but the same current by adjusting the size of the silicon wafer;

[0059] Specifically, take a P-type whole silicon wafer with a size of 210mm*210mm and prepare a PERC single-sided battery according to the preparation process of a PERC battery as the first battery; take an N-type 2 / 3 piece of silicon with a size of 210mm*140mm The wafer is prepared according to the TOPCon battery preparation process to obtain a TOPCon single-sided battery as the second battery; here, the silicon wafer refers to a single crystal silicon wafer, which is obtained by cutting the silicon rod body, silicon rod edge leather or silicon rod head and tail. The size of the obtained first battery is 210mm*210mm, and the size of the second battery is 210mm*140mm; wherein, the area of ​​the first battery is S1, the area of ​​the se...

Embodiment 2

[0066] With embodiment 1, difference is:

[0067] In step (1), the first battery uses a P-type PERC single-sided battery with the same efficiency level of 22%, and the second battery 2 uses an N-type TOPCon single-sided battery with the same efficiency level of 23%. The same efficiency level here refers to the battery sorting and packaging efficiency. The actual efficiency of the battery and the sorting and packaging efficiency have a certain error range. In this embodiment, the error range is 0.1%. For example, the actual efficiency of the battery falls at 21.95%. The range of -22.05% is considered to be the same efficiency gear 22%; the same efficiency gear is selected to meet the voltage of a battery string composed of the same number of first batteries 1 and the same number of second batteries 2 under the same current conditions Basically consistent, it is convenient for parallel connection between battery strings, so that the output power of each component is concentrated...

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Abstract

The invention discloses a preparation method of a solar photovoltaic module. First batteries and second batteries which are different in area and identical in current are obtained; and the electrodes of the first batteries and the second batteries are reversely arranged at intervals. According to the preparation method, current matching of the module is achieved by adjusting the area of the batteries, the problem of module current mismatching caused by the difference of silicon wafer substrates used by the batteries and the difference of battery preparation processes is solved, the packaging loss of the module is reduced, and the output power of the module is improved.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a method for preparing a solar photovoltaic module. Background technique [0002] Solar photovoltaic modules consist of multiple interconnected solar cells. When solar photovoltaic modules are produced, the positive poles of all solar cells face one side, and the negative poles face one side. The solder ribbon welds the positive pole of the solar cell to the negative pole of the adjacent solar cell, and the positive pole of the adjacent solar cell is connected to the next adjacent solar cell. The negative electrodes of the solar cells are connected in series, and so on, the solar cells are connected in series to form solar cell strings, and then the solar cell strings are connected in series / parallel and packaged into modules. This series connection method requires a certain gap between the solar cells for the interconnection strips to bend through, which will lead t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05H01L31/048H01L31/18
CPCH01L31/0504H01L31/048H01L31/1876Y02P70/50Y02E10/50
Inventor 陈章洋许佳平曹育红符黎明
Owner CHANGZHOU SHICHUANG ENERGY CO LTD
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