CN103887356A - Light solar photovoltaic power generation component and stacking method in production technology thereof - Google Patents

Abstract

A light-weight solar photovoltaic power generation module and a lamination method in its production process, wherein the main body of the module is, from bottom to top, a tempered glass layer, a thermoplastic resin layer (EVA), a solar cell string sheet, a thermoplastic resin layer (EVA) and a back ply. More preferably, a reinforcing rib is adhered on the back of the component main body, and screw holes are provided on it, and the photovoltaic component is screwed to the load-bearing carrier. The lamination method in its production process includes adding a tempered glass layer with a thickness of 4 mm on the main body of the component and below it; manually pinching the two short sides of the main body of the component respectively, and rotating the component up and down by 180 degrees The main body: remove the two tempered glass layers with a thickness of 4mm, and enter the next step of the process. By adopting the method of the invention, the problems that the components are not easy to move in the stacking step during production and the tempered glass is easily broken are overcome, thereby obtaining a light solar photovoltaic power generation component with qualified quality, light weight and improved power generation efficiency.

Description

A light-weight solar photovoltaic power generation module and a lamination method in its production process

technical field

The invention relates to a photovoltaic power generation component and a production process thereof, in particular to a light-weight solar photovoltaic power generation component and a stacking method in the production process thereof. the

Background technique

Nowadays, there are more and more examples of using solar photovoltaic modules to generate electricity. While people enjoy this clean energy, they have higher and higher requirements for the applicability of solar photovoltaic modules. At present, solar photovoltaic modules are widely used in factory roofs and parking sheds. , villa roof and ground photovoltaic power station. The weight of ordinary solar panels is generally 20-30KG, and a support bracket is required for installation. For new buildings, the support bracket is usually erected after the roof cover is installed and before the roof waterproofing material is installed, and the installation steps are cumbersome; Buildings, because the weighing design of the top-level structure of the original roof and carport did not take into account the installation of solar photovoltaic grid-connected power generation systems, resulting in insufficient static load bearing on the top floors of most roofs and carports, the photovoltaic grid-connected power generation system cannot be installed or needs to be re-strengthened Roof structure to bear the additional weight of the PV system. the

At present, the thickness of the photovoltaic module glass used in the conventional photovoltaic grid-connected power generation system is 3.2mm, and the weight of the system including the component support is greater than 20 kg per square meter. Due to the different shapes of the load-bearing carriers, the photovoltaic grid-connected power generation system is largely limited installed apps. the

The core key of photovoltaic power generation is to effectively absorb sunlight to increase the power of photovoltaic power generation. Only the transmitted light will produce a photoelectric reaction to the crystalline silicon cell and convert solar energy into electrical energy. Since the light transmittance of traditional photovoltaic module glass is only about 92%, about 8% of visible light is lost due to the reflection and absorption of glass, resulting in a decrease in power generation efficiency. the

The invention relates to a light-weight solar photovoltaic power generation component. The key point of the light-weight component is to use lighter and thinner tempered glass. However, thin and light tempered glass is very soft and relatively thin. If you use the conventional lamination method (as shown in Figure 1): 1. Laying tempered glass, 2. Laying EVA, 3. Laying battery strings, 4. Welding battery strings, 5. . Laying EVA, 6. Laying back film. In the actual production process, there may be the following problems. The laminated semi-finished solar panels cannot be lifted or flowed into the next process, and the soft tempered glass is easy to be broken during lamination. the

In order to achieve the purpose of the above invention, there is an urgent need for a lightweight solar photovoltaic power generation module that is light in weight, can reduce the static load of the load-bearing carrier, and is easy to install, while improving the light transmittance of the glass, and a stacking method of the light solar photovoltaic power generation module To ensure that the light-weight solar photovoltaic power generation module is normally carried out in the lamination process in the production process, ensure the production quality of the photovoltaic module, and meet the requirements for producing a light-weight solar photovoltaic power generation module with reliable quality. the

Contents of the invention

In order to solve the above technical problems, the present invention relates to a component of a light-weight solar photovoltaic power generation system and a stacking method in the production process of a light-weight solar photovoltaic power generation component. The light photovoltaic module of the present invention is light in weight and high in mechanical strength; it does not require support brackets and is easy to install; at the same time, it can improve the light transmittance of the glass and increase the power generation efficiency. the

The lamination method in the production process of photovoltaic modules overcomes the shortcomings of being unable to lift or flow the laminated semi-finished solar panels into the next process, and easily breaking the soft tempered glass during lamination. the

To achieve the purpose of the above invention, the technical solution provided by the present invention is: a component of a light-weight solar photovoltaic power generation system, including: a component body, junction boxes and aluminum frames around the component body, and the component body passes through the The junction box and the aluminum frame are encapsulated to form an encapsulation layer, and the main body of the component is sequentially laid with a tempered glass layer, a thermoplastic resin layer (EVA), a solar cell string sheet, a thermoplastic resin layer (EVA) and a backplane layer from bottom to top. the

Further, the thickness range of the tempered glass layer is 0.8mm, and the iron content is less than or equal to 0.2%. the

Further, a protective layer is provided outside the encapsulation layer, and the material of the protective layer is soft plastic. the

Further, the protective layer is treated with anodic oxidation. the

Further, a plurality of reinforcing ribs are arranged on the back of the component main body, and the reinforcing ribs form convex ribs relative to the back of the component main body. the

Further, screw holes are provided on the bottom surface of the reinforcing rib. the

A lamination method in the production process of the light solar photovoltaic power generation system components, characterized in that, comprising

1) The step of laying the tempered glass layer;

2) The step of laying an EVA layer on the tempered glass layer;

3) The step of laying battery strings on the EVA layer;

4) The step of laying an EVA layer on the battery string;

5) The step of laying a backplane layer on the EVA layer in step 4 to form the main body of the component;

6) A step of placing a tempered glass layer with a length and width larger than the tempered glass layer and a thickness of 4mm under the main body of the component;

7) A step of adding a tempered glass layer with a thickness of 4mm as described in step 6) above the main body of the component;

8) The steps of manually pinching the two short sides of the component body, rotating the component body 180 degrees, and reversing the component body up and down;

9) Remove the tempered glass layer with a thickness of 4 mm on the upper and lower layers of the component body, and enter the next process step. the

Further, it also includes the step of performing defect detection (EL) of the solar battery module after the step 6). the

Further, the length and width of the tempered glass with a thickness of 4 mm are both larger than the tempered glass by more than 10 cm. the

Adopt above-mentioned technical scheme, the beneficial effect of the present invention has:

1. The present invention provides a light-weight solar photovoltaic power generation module. Because it uses a light and thin tempered glass layer, it has high mechanical strength and can withstand large temperature differences between day and night and wind pressure of 2400pa. the

2. The power generation assembly of the present invention is bonded with reinforcing ribs on the back of the main body of the assembly, and the screw holes on the reinforcing ribs are threadedly connected with the load-bearing carrier, and only need to drill holes on the load-bearing carrier to quickly and reliably realize solar photovoltaic power generation. The installation of power generation system components requires no additional support brackets, which simplifies the installation steps and reduces the overall weight of the components, so as to achieve the effect of being suitable for load-bearing carriers of various shapes and inclinations. the

3. Since the present invention simplifies the installation structure of photovoltaic modules and adopts light-weight module main materials at the same time, the overall weight is reduced to less than or equal to 5 kilograms per square meter, which is comparable to the mass of traditional solar photovoltaic power generation components of 20 kilograms per square meter. Compared with the overall weight, the overall weight is greatly reduced, thereby reducing the load-bearing burden of the load-bearing carrier, and eliminating the decoration process of re-strengthening the load-bearing carrier. the

4. The present invention provides an ultra-thin tempered glass layer, the thickness of which is only 0.8mm-1.5mm. Compared with the traditional photovoltaic module glass thickness of 3.2mm, the thickness is greatly reduced, so it can effectively block the transmission of light such as ultraviolet rays. The light transmittance reaches 92%, which increases the power generation efficiency of photovoltaic modules by 1%. the

5. The photovoltaic module of the present invention is anodized outside the aluminum frame, which can meet the requirements of solar photovoltaic power generation modules used in coastal areas. the

6. The present invention optimizes the stacking steps in the production process of light-weight solar photovoltaic power generation components, and overcomes the problems in the actual production process that the stacked semi-finished solar panels cannot be lifted or flowed into the next process, and the soft tempered panels are easy to be tempered during stacking. Defects such as broken glass ensure the quality of photovoltaic modules. the

Description of drawings

Fig. 1 is the schematic illustration of the structure of the main body of the laminated assembly in the prior art;

Figure 2 is an exploded view of the structure of the main body of the laminated assembly of the present invention;

Fig. 3 is the production process flowchart of an embodiment of the present invention;

Figure 4 is a schematic diagram of the structure of the back of the assembly of another embodiment of the present invention;

Fig. 5 is a schematic diagram of the front structure of the assembly of another embodiment of the present invention;

Figure 6 is a partial enlarged view in Figure 4;

Fig. 7 is a schematic diagram of the application effect of the present invention. the

Among them: 1 tempered glass layer, 2 EVA layer, 3 solar cell string layer, 4 backplane layer, 5 tempered glass layer with a thickness of 6mm, 6 aluminum frame, 7 ribs, 8 junction box. the

Detailed ways

Fig. 2 is an exploded view of the structure of the main body of the laminated assembly of the present invention. As shown in Fig. 2, the main body of the assembly is successively laid with a tempered glass layer with a thickness of 6 mm, a tempered glass layer, an EVA layer, a solar cell string layer, an EVA layer, Backplane layer, tempered glass layer with a thickness of 6mm. the

Example 1

Figure 3 is a flow chart of the production process of solar photovoltaic materials according to an embodiment of the present invention. The cells are screened out, and then the cells are passed through the testing equipment to screen out the low-power cells, and the cells are classified according to the power to ensure the quality and power optimization of the components. the

Single-chip welding: connect the soldering strip to the busbar on the front side (negative pole) of the battery, and lead out the negative pole of the battery sheet. The soldering strip is a tin-coated copper strip. the

Soldering string: use the ribbon combined with auxiliary materials such as solder wire, flux, etc. to correctly connect the individual cells that have been soldered in series. the

Lamination: Put the toughened glass with a thickness of 0.8mm on the workbench with the confluence tape and welding tape, put the glass wool side up, lay the EVA layer woolen side up on it, and then lay the battery string on it. The positive electrode of the battery sheet is facing upward, and then soldered with a reflow tape in turn, and then lay a layer of EVA and a layer of backsheet. Note that the suede surface of the EVA should face the battery sheet, and lead the positive electrode and negative electrode of the battery module from the small hole. Use scotch tape to fix the lead-out confluence belt on the backplane, and double-sided adhesive to fix the EVA and the backplane layer to form the main body of the module. Under the main body of the module, place a piece of glass whose length, width and thickness are larger than tempered glass. Layer 10cm of tempered glass layer with a thickness of 4mm, and then carry out defect detection of battery components, and then add a layer of tempered glass with a thickness of 4mm above the component body, and finally hold the two short sides of the component body respectively, 180 Rotate the main body of the component to a high degree, reverse the main body of the component up and down, and finally remove the 4mm tempered glass on and below the main body of the component, and enter the next process. the

Intermediate inspection: In order to ensure the quality of laminated components, the intermediate inspection platform is used to detect the voltage and current of the components. the

Lamination and solidification: Put the laid battery components into the laminator, vacuum out the air in the components and laminate them, heat to melt the EVA to bond the battery, glass and back plate together, and then take it out after cooling During lamination, the EVA melts and then expands and solidifies due to pressure to form burrs, which are finally cut off. the

Framed wiring: glass components are installed in a silicone-filled aluminum frame to increase the strength of the component, and the back of the component is glued and the junction box is welded at the lead to facilitate the connection between the battery component and other equipment or battery components. the

Wipe: Wipe away foreign matter and EVA residue on the surface of the glass, aluminum frame, and backplane. the

Final test: Use a tester to detect the output power of the battery components and determine the quality level of the components. the

Final inspection: The international iec standard test conditions are am1.5, 100mw/m ² , 25°C. Detect the following parameters: open circuit voltage, short circuit current, working voltage, working current, maximum output power, fill factor, photoelectric conversion efficiency, series resistance, parallel resistance and IU curve, etc.

Example 2

What Fig. 4, 5, 6 represent is another embodiment of the present invention, as shown in Fig. 4, 5, 6: adopt the assembly of a kind of light-duty solar photovoltaic power generation system produced by the method of the present invention, adopt thickness to be 0.8mm Tempered glass, its iron content does not exceed 0.2%, good tempering performance, the weight is only 2 kg per square meter, and can meet the mechanical strength against 2400pa wind strength, and at the same time, within the wavelength range of the solar cell spectral response of 320-1100nm, The light transmittance reaches more than 92%;

EVA is a hot-melt adhesive that contains a cross-linking agent. After hot pressing, it will undergo fusion bonding and cross-linking solidification. The cured EVA has elasticity, envelops the battery layer up and down, and can be bonded with the tempered glass layer. Improve glass light transmittance;

The material of the back plate layer in this embodiment is made of soft plastic material, such as: fluorine-containing resin film, which has good temperature resistance and corrosion resistance, and can be well bonded with EVA. The back plate layer has a thickness of 0.3mm;

The purpose of lamination is to melt the high-temperature adhesive at high temperature, and bond the glass layer and the battery sheet together to form a whole, so as to protect the battery sheet of the power generation unit;

The junction box is made of ABS, the terminal is made of high-conductivity copper solution, and the junction box is glued to the back panel with silicone;

The wall thickness of the aluminum alloy frame is 1mm to ensure that the components will not be corroded in the outdoor environment;

A protective layer is provided outside the encapsulation layer, and the protective layer is treated with anodic oxidation;

A plurality of reinforcing ribs are bonded with high-strength double-sided adhesive on the back of the component main body, and the reinforcing ribs form convex ribs relative to the back of the component main body. The reinforcing ribs are not only used to fix the photovoltaic module, Moreover, the space between the protruding ribs on the back side of the module main body is beneficial to the air circulation and helps the photovoltaic module to dissipate heat. the

The surface of the glass, aluminum frame, and back plate of the present invention should be kept clean, free from foreign matter, silica gel residue, EVA residue, etc.; the color of the cells used in the same module should not have obvious color difference. the

As shown in FIG. 6 , screw holes are provided on the bottom surface of the reinforcing ribs, and the screw holes on the reinforcing ribs are threadedly connected with the load-bearing carrier to install the present invention on the load-bearing carrier. the

The components of the installed light solar photovoltaic power generation system are shown in Figure 7. the

The product produced according to the method of the present invention, according to the GB/IEC61730-1 detection standard, carries out a 500v per second increase voltage test to detect whether the frame of the present invention and the internal charged body (battery sheet, welding ribbon, etc.) are under high voltage. Conduction can occur and be dangerous, with the results shown in the table below. the

According to the GB/IEC61730-1 testing standard, the insulation withstand voltage test results:

According to the GB/IEC61730-2 test standard, test the resistance between the frame and the ground to determine whether the frame grounding performance is good, and the results are shown in the table below. the

According to the GB/IEC61730-2 testing standard, the insulation withstand voltage test results:

The above-mentioned embodiments only express the implementation manner of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims. the

Claims (9)

1. the assembly of a light-weight solar photovoltaic generating system, comprise: module body and terminal box and aluminium frame in described module body surrounding, described module body is encapsulated and is formed encapsulated layer by described terminal box and aluminium frame, it is characterized in that, described module body is laid toughened glass layer, thermoplastic resin (EVA), solar cell string group sheet, thermoplastic resin (EVA) and backsheet layer from bottom to up successively.

2. the assembly of a kind of light-weight solar photovoltaic generating system according to claim 1, is characterized in that, described toughened glass layer thickness scope is 0.8mm, and iron-holder is less than or equal to 0.2%.

3. the assembly of a kind of light-weight solar photovoltaic generating system according to claim 1, is characterized in that, is provided with protective layer in described encapsulated layer outside, and the material of described protective layer is soft plastic.

4. the assembly of a kind of light-weight solar photovoltaic generating system according to claim 3, is characterized in that: described protective layer adopts anodized.

5. the assembly of a kind of light-weight solar photovoltaic generating system according to claim 1, is characterized in that, at the back side of described module body, many reinforcements is set, and described reinforcement forms fin with respect to the back side of described module body.

6. the assembly of a kind of light-weight solar photovoltaic generating system according to claim 4, is characterized in that, is provided with screw in the bottom surface of described reinforcement.

7. the laminating method in the production technology of described light-weight solar photovoltaic generating system assembly, is characterized in that, comprises

1) lay the step of toughened glass layer;

2) step of laying EVA layer on described toughened glass layer;

3) on described EVA layer, lay the step of battery strings group;

4) step of laying EVA layer in described battery strings group;

5) on the described EVA layer in step 4, lay backsheet layer, form the step of module body;

6) below described module body, pad is put a block length, width and is all greater than described toughened glass layer, the step of the toughened glass layer that thickness is 4mm;

7) above described module body, increase the step of the toughened glass layer that the thickness described in step 6) is 4mm;

8) artificial two minor faces that grip respectively described module body, 180 degree rotate described module body, exchange up and down the step of described module body;

9) remove the toughened glass layer that the described thickness of the upper and lower layer of module body is 4mm, the step that enters next process.

8. the laminating method in the production technology of a kind of described light-weight solar photovoltaic generating system assembly according to claim 7, is characterized in that, is also included in the step of carrying out solar module defects detection (EL) after described step 6).

9. the laminating method in the production technology of a kind of described light-weight solar photovoltaic generating system assembly according to claim 7, is characterized in that, more than the length and width of the toughened glass that described thickness is 4mm are all greater than described toughened glass layer 10cm.

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