WO2017211179A1

WO2017211179A1 - Solar cell module lay-up structure

Info

Publication number: WO2017211179A1
Application number: PCT/CN2017/085601
Authority: WO
Inventors: 林瀚琪; 王旭辉
Original assignee: 刘申冉
Priority date: 2016-06-06
Filing date: 2017-05-24
Publication date: 2017-12-14
Also published as: CN205845986U

Abstract

A solar cell module lay-up structure, the lay-up structure comprising a glass panel (1), a first EVA layer (2), a cell panel (3), a second EVA layer (4) and a backboard (5) stacked and laid up in sequence; at a first side of the glass panel (1) and a second side adjacent to the first side, the edge of first EVA layer (2) extends past the edge of the glass panel (1) by a width equal to a first value, and the edge of the second EVA layer (4) extends past the edge of the glass panel (1) by a width equal to a second value; at a third side of the glass panel (1) which is opposite the first side, and a fourth side which is opposite the second side, the edge of the first EVA layer (2) extends past the edge of the glass panel (1) by a width equal to the second value, and the edge of the second EVA layer (4) extends past the edge of the glass panel (1) by a width equal to the first value; the first value is smaller than the second value.

Description

Laying structure of solar cell module

Technical field

The present invention relates to the field of solar cell technologies, and in particular, to a laying structure in a packaging process of a solar cell module.

Background technique

The solar cell module is a power generation unit that is framed by glass, EVA (abbreviation of Ethylene-vinyl acetate, ethylene-vinyl acetate copolymer), battery, and back sheet, and is packaged and laminated. Packaging is a key step in the production of solar cells. Without a good packaging process, a good battery can not produce a good component board. The battery package not only ensures the battery life, but also enhances the battery's impact strength. The high quality and longevity of the product is the key to winning customer satisfaction, so the package quality of the component board is very important.

At present, the packaging process commonly used in solar cell modules is: battery testing - front welding - back series - laying - lamination - mounting frame - welding junction box - component testing - visual inspection - packaging Storage. Wherein, the laying mainly refers to laminating the glass, the EVA, the battery, and the backing plate, and generally stacking the glass, the first layer of EVA, the battery, the second layer of EVA, and the backing plate in this order from bottom to top. Lamination refers to the combination of the various components that have been laid down using a hot press to form a unit, specifically the first layer of EVA and the second layer in the laminated structure under a certain degree of vacuum and a certain temperature. The EVA is hot melted and cured, so that the functional layers constituting the solar cell module are well combined.

Since the first layer of EVA and the second layer of EVA are first heat-melted and re-solidified in the laminating process, in the laying process, the circumference of the first layer of EVA and the second layer of EVA need to be beyond the periphery of the glass. In the current laying structure, the first layer of EVA and the second layer of EVA are all surrounded by 3 to 5 mm around the glass, and the circumference is symmetrically laid. The laying structure mainly has the following two problems: (1) the area of the first layer EVA and the second layer EVA are large, the amount of EVA is large, which leads to an increase in production cost of the product; (2) after the lamination process, There are more EVA residues on the laminating equipment, resulting in increased equipment wear.

Summary of the invention

In view of this, the present invention provides a laying structure of a solar cell module, through the packager The improvement of the laying structure in the art can effectively reduce the amount of EVA in the production process of solar modules, reduce the production cost and product unit consumption, and also reduce the residual of EVA in the laminating machine during the lamination process of solar modules. Equipment loss.

In order to achieve the above object, the present invention adopts the following technical solutions:

A laying structure of a solar cell module is applied to a laying process of a solar cell module packaging process, wherein the laying structure comprises sequentially laminating a glass plate, a first EVA layer, a battery board, a second EVA layer, and a back sheet Wherein, on a first side of the glass sheet and a second side adjacent to the first side, a width of an edge of the first EVA layer beyond an edge of the glass sheet is a first value, the second The width of the edge of the EVA layer beyond the edge of the glass sheet is a second value; the first EVA layer is on a third side of the glass sheet opposite the first side and a fourth side opposite the second side The width of the edge beyond the edge of the glass sheet is a second value, and the width of the edge of the second EVA layer beyond the edge of the glass sheet is a first value; wherein the first value is less than the second Value.

Further, the first value is smaller than the second value by 1 to 3 mm.

Further, the first value is 1 to 2 mm, and the second value is 3 to 4 mm.

Compared with the prior art, the laying structure of the solar cell module provided by the embodiment of the present invention is applied to the laying process of the solar cell module packaging process, in the laying structure, on the first side and the first side of the glass plate Adjacent second side, the width of the edge of the first EVA layer beyond the edge of the glass sheet is a first value, and the width of the edge of the second EVA layer beyond the edge of the glass sheet is a second value; The third side opposite to the other side and the fourth side opposite to the second side, the edge of the first EVA layer extends beyond the edge of the glass sheet to a second value, and the edge of the second EVA layer extends beyond the edge of the glass sheet. a first value, the first value is smaller than the second value, whereby the first EVA layer and the second EVA layer adopt a misaligned complementary laying structure, and the first EVA layer and the first The two EVA layers can respectively reduce the width of the edges of the glass sheets on both sides thereof, which can effectively reduce the amount of EVA in the production process of the solar module, reduce the production cost and the unit consumption, and can also reduce the solar modules. Producing the lamination process, EVA remaining in the laminating machine, to reduce equipment wear and tear.

DRAWINGS

1 is an exemplary illustration of a laying structure of a solar cell module according to an embodiment of the present invention;

2 is an exemplary illustration of a relative position of a first EVA layer and a glass sheet in an embodiment of the present invention;

3 is an exemplary illustration of the relative position of a second EVA layer to a glass sheet in an embodiment of the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of the invention shown in the drawings and described in the drawings are merely exemplary, and the invention is not limited to the embodiments.

In this context, it is also to be noted that in order to avoid obscuring the invention by unnecessary detail, only the structures and/or processing steps closely related to the solution according to the invention are shown in the drawings, and the Other details that are not relevant to the present invention.

In the packaging method of the solar cell module, the method mainly comprises the following steps:

S1, battery inspection, in order to achieve the purpose of fragmentation:

Due to the randomness of the production conditions of the battery, the performance of the produced battery is not the same, so in order to effectively combine the batteries with the same performance or similar performance, it should be classified according to its performance parameters; the battery test passes the test battery output. The parameters (current and voltage) are categorized to improve battery utilization and to make quality qualified battery components.

S2, front welding:

The bus bar is soldered to the main grid line on the front side (negative electrode) of the battery. The bus bar is a tinned copper strip, and the extra solder strip is connected to the back electrode of the rear cell when soldered on the back side.

S3, back connection:

The back side soldering is to connect a plurality of batteries in series to form a component string, and the operator solders the front electrode (negative electrode) of the "front battery" to the back electrode (positive electrode) of the "back battery" by using a soldering iron and a solder wire, so that The plurality of sheets are connected in series and the leads are welded to the positive and negative electrodes of the component string to form a battery panel.

S4, laying process (also called lamination process):

After the back side is connected in series and passed the inspection, the panel, the glass plate and the cut EVA and the back sheet are laid at a certain level to prepare for lamination.

S5, laminated:

The laid battery is placed in a laminator, the air in the assembly is evacuated by vacuuming, and then heated to fuse the EVA to bond the battery, the glass, and the backing plate together, and finally the assembly is cooled.

S6, frame:

Similar to attaching a frame to the glass; attaching an aluminum frame to the glass assembly to increase the strength of the assembly, further sealing the battery assembly and extending the life of the battery.

S7, welded junction box:

Solder a box at the back of the assembly to facilitate connection between the battery and other equipment or batteries.

S8, component testing:

The purpose of the test is to calibrate the parameters such as the output power of the battery, test its output characteristics, and determine the quality level of the components.

S9, appearance inspection.

S10, packaging and storage:

Record and summarize product information for ease of use and future lookups and data calls.

The present invention mainly improves the laying structure in the laying process of step S4. Specifically, as shown in FIG. 1 , the laying structure comprises, in order from bottom to top, a glass plate 1, a first EVA layer 2, a battery panel 3, a second EVA layer 4, and a backing plate 5.

2 and FIG. 3, FIG. 2 shows the relative positional relationship between the first EVA layer 2 and the glass sheet 1, and FIG. 3 shows the relative positional relationship between the second EVA layer 4 and the glass sheet 1. As shown in FIG. 2, at the first side 1a of the glass sheet 1 and the second side 1b adjacent to the first side 1a, the edge of the first EVA layer 2 is beyond the width of the edge of the glass sheet 1. Is a first value d1, and the third side 1c of the glass sheet 1 opposite to the first side 1a and the fourth side 1d opposite to the second side 1b, the edge of the first EVA layer 2 exceeds the The width of the edge of the glass plate 1 is a second value d2, wherein the first value d1 is smaller than the second value d2, and the value of the second value d2 is opposite to the edge of the glass plate of the four peripheral edges of the EVA layer in the prior art. The width is quite. Further, the laying of the second EVA layer 4 is complementary to the misalignment of the first EVA layer 2, as shown in FIG. 3, on the first side 1a of the glass sheet 1 and the first side adjacent to the first side 1a On both sides 1b, the width of the edge of the second EVA layer 4 beyond the edge of the glass sheet 1 is a second value d2, and on the third side 1c and the opposite side of the first side 1a of the glass sheet 1 The fourth side 1d opposite to the second side 1b has a width of the edge of the second EVA layer 4 beyond the edge of the glass sheet 1 being a first value d1.

Based on the above laying structure, since the second value d2 is equivalent to the existing value, the first value d1 Less than the second value d2, although the area of the single EVA layer (the first EVA layer 2 or the second EVA layer 4) is reduced, the first EVA layer 2 and the second EVA layer 4 are stacked and misaligned and complementary, which is still The package requirement of the component can be satisfied; and since the first EVA layer 2 and the second EVA layer 4 can respectively reduce the width of the edge of the glass plate 1 on both sides thereof, the amount of EVA in the solar component production process can be effectively reduced and reduced. Production cost and product unit consumption, and can also reduce the residual of EVA in the laminating machine during the lamination process of solar modules, and reduce equipment loss.

In a preferred technical solution, the first value d1 is smaller than the second value d2 by 1 to 3 mm. Specifically, in the embodiment, the first value d1 is selected to be between 1 and 2 mm, and the second value d2 is selected to be between 3 and 4 mm.

In summary, the laying structure of the solar cell module provided by the embodiment of the present invention can effectively reduce the amount of EVA in the production process of the solar module, reduce the production cost and the unit consumption of the product by improving the laying structure in the packaging process, and It can also reduce the residual of EVA in the laminating machine during the lamination process of solar modules, and reduce equipment loss.

It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The above description is only a specific embodiment of the present application, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present application. It should be considered as the scope of protection of this application.

Claims

A laying structure of a solar cell module is applied to a laying process of a solar cell module packaging process, wherein the laying structure comprises sequentially laminating a glass plate, a first EVA layer, a battery board, a second EVA layer, and a back sheet ;

Wherein, on a first side of the glass sheet and a second side adjacent to the first side, a width of an edge of the first EVA layer beyond an edge of the glass sheet is a first value, the second EVA a width of the edge of the layer beyond the edge of the glass sheet is a second value; a third side of the glass sheet opposite the first side and a fourth side opposite the second side, the first EVA layer The width of the edge beyond the edge of the glass sheet is a second value, and the width of the edge of the second EVA layer beyond the edge of the glass sheet is a first value;

Wherein the first value is less than the second value.
The laying structure of a solar cell module according to claim 1, wherein the first value is smaller than the second value by 1 to 3 mm.
The laying structure of a solar cell module according to claim 1, wherein the first value is 1 to 2 mm, and the second value is 3 to 4 mm.
The laying structure of a solar cell module according to claim 2, wherein the first value is 1 to 2 mm, and the second value is 3 to 4 mm.