CN107768465A - A kind of solar cell module and preparation method thereof - Google Patents

Abstract

The invention discloses a solar cell module and a preparation method thereof, comprising an ethylene-tetrafluoroethylene copolymer layer, an ethylene-vinyl acetate copolymer layer a, a solar cell layer, an ethylene-vinyl acetate The copolymer layer b and the PCB layer; the solar cell layer is connected in series by a plurality of cell units, the bottom edge of the PCB board is provided with a junction box, and the junction box is electrically connected to the positive and negative outputs of the solar cell layer. The ethylene-tetrafluoroethylene copolymer is laminated to the surface of the solar cell module. The ethylene-tetrafluoroethylene copolymer film layer has strong toughness. It maintains good heat resistance, chemical resistance and electrical insulation performance, and is resistant to The radiation and mechanical properties are greatly improved, preventing the attenuation of the photoelectric conversion function.

Description

A kind of solar cell component and preparation method thereof

technical field

The invention belongs to the technical field of solar cells, relates to a solar cell assembly, and also relates to a preparation method of the solar cell assembly.

Background technique

Due to the increasingly serious global energy crisis and environmental problems, people's demand for new energy and non-polluting renewable energy is becoming more and more urgent. Solar cells are a promising technology in new energy and renewable energy. In recent years, solar cells, as a renewable clean energy, have been highly valued by countries all over the world, and scientific research and industrial development are very rapid. Crystalline silicon solar cells occupy a leading position in the industry due to their high photoelectric conversion efficiency, abundant raw materials, and industrial production stability, with a photovoltaic market share exceeding 90%.

The most basic components of solar photovoltaic power generation are solar cell units, including monocrystalline silicon, polycrystalline silicon, and thin-film batteries. One or several solar cell units are packaged to form a solar cell module.

At present, the popular packaging structure of solar cell modules is: tempered glass-EVA (ethylene-vinyl acetate copolymer)-solar cells connected by interconnecting bars-EVA-TPT film (weather-resistant composite fluoroplastic film) laminated package. Tempered glass is fragile, thick, and heavy. In addition, the material for photovoltaic conversion in solar cells is generally silicon wafers. However, if silicon wafers are directly exposed to the atmosphere, their photoelectric conversion performance will be attenuated.

Contents of the invention

The object of the present invention is to provide a solar cell module capable of preventing degradation of photoelectric conversion function.

Another object of the present invention is to provide a method for preparing a solar cell module, which can realize high-efficiency and low-cost production.

The technical solution adopted in the present invention is a solar cell module, including an ethylene-tetrafluoroethylene copolymer layer, an ethylene-vinyl acetate copolymer layer a, a solar cell layer, an ethylene-acetic acid Ethylene copolymer layer b and PCB board layer;

The solar cell layer is connected in series by a plurality of cell units, and a junction box is provided on the bottom edge of the PCB, and the junction box is electrically connected to the positive and negative outputs of the solar cell layer.

The present invention is also characterized in that,

The solar cell layer is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the ethylene-tetrafluoroethylene copolymer layer is 0.1 mm to 1 mm; the thickness of the ethylene-vinyl acetate copolymer layer a is 10 mm to 500 μm; the thickness of the solar cell layer is 0.15 mm to 0.25 mm; the ethylene-vinyl acetate copolymer layer The thickness of b is 10 mm to 500 μm; the thickness of the PCB layer is 1.0 mm to 1.5 mm.

Another technical solution adopted in the present invention is a method for preparing a solar cell module, which specifically includes the following steps:

Step 1. First, stack the ethylene-tetrafluoroethylene copolymer layer, ethylene-vinyl acetate copolymer layer a, solar cell layer, ethylene-vinyl acetate copolymer layer b and PCB board layer in order to form component A, and then stack The good module A is put into the solar cell module laminator; then the auxiliary heating device of the solar cell module laminator is heated to 250 ° C ~ 265 ° C, and the pressure is applied by the solar cell module laminator, and the pressure value is one atmosphere. Immediately thereafter, the heating was stopped to obtain component B;

Step 2. The solar cell module laminator draws out the air in the module B obtained in step 1 by vacuuming, and then heats it to 135°C to 145°C to make the ethylene-vinyl acetate copolymer layer a and the ethylene-vinyl acetate copolymer Layer b is melted, and the ethylene-tetrafluoroethylene copolymer layer, the solar cell layer and the PCB board layer are bonded together, and after heating and pressing for 15 minutes to 25 minutes, it is sent out of the solar cell module laminating machine cavity to obtain Crude solar cell components;

Step 3. After the rough product of the solar cell module obtained in step 2 is cooled, the burrs are removed, and then a junction box is installed to obtain a solar cell module.

The present invention is also characterized in that,

The solar cell layer is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

Step 3: The thickness of the solar cell module from top to bottom is: the ethylene-tetrafluoroethylene copolymer layer is 0.1 mm to 1 mm; the ethylene-vinyl acetate copolymer layer a is 10 mm to 500 μm; the solar cell layer is 0.15 mm to 0.25 mm; ethylene-vinyl acetate copolymer layer b is 10mm to 500μm; PCB layer is 1.0mm to 1.5mm.

The beneficial effects of the present invention are:

(1) In the solar cell assembly of the present invention, the cells are connected in series to increase the conversion efficiency of the overall electric energy;

(2) solar cell module of the present invention, ethylene-tetrafluoroethylene copolymer is laminated to the surface of solar cell module, and ethylene-tetrafluoroethylene copolymer thin film layer has toughness, and it has kept good heat resistance, resistance In addition to the chemical properties and electrical insulation properties, the radiation resistance and mechanical properties have been greatly improved to prevent the attenuation of the photoelectric conversion function;

(3) The preparation method of the present invention can be quickly integrated into actual large-scale mass production, so that the cost of solar cell modules can be controlled, and low-cost and high-efficiency production can be realized.

Description of drawings

Fig. 1 is a schematic structural diagram of a solar cell module of the present invention.

In the figure, 1. ethylene-tetrafluoroethylene copolymer layer, 2. ethylene-vinyl acetate copolymer layer a, 3. solar cell layer, 4. ethylene-vinyl acetate copolymer layer b, 5. PCB board layer, 6. Junction Box.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

A solar cell assembly of the present invention, as shown in Figure 1, comprises an ethylene-tetrafluoroethylene copolymer layer 1, an ethylene-vinyl acetate copolymer layer a2, a solar cell layer 3, an ethylene-tetrafluoroethylene copolymer layer a2, The vinyl acetate copolymer layer b4 and the PCB board layer 5; the ethylene-vinyl acetate copolymer layer a2 and the ethylene-vinyl acetate copolymer layer b4 are used to fix the solar cell layer 3 and play a certain protective role.

The solar cell layer 3 is composed of a plurality of cell units connected in series to form a cell array. The bottom edge of the PCB board 5 is provided with a junction box 6, and the junction box 6 is provided with two connecting wires in the same direction. 6. Electrically connect the positive and negative outputs of the solar cell layer 3.

The present invention is also characterized in that,

The solar cell layer 3 is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the ethylene-tetrafluoroethylene copolymer layer 1 is 0.1 mm to 1 mm; the thickness of the ethylene-vinyl acetate copolymer layer a2 is 10 mm to 500 μm; the thickness of the solar cell layer 3 is 0.15 mm to 0.25 mm; the ethylene-vinyl acetate copolymer The thickness of the object layer b4 is 10 mm˜500 μm; the thickness of the PCB layer 5 is 1.0 mm˜1.5 mm.

A kind of preparation method of solar cell assembly of the present invention, specifically implement according to the following steps:

Step 1. First, the ethylene-tetrafluoroethylene copolymer layer 1, the ethylene-vinyl acetate copolymer layer a2, the solar cell layer 3, the ethylene-vinyl acetate copolymer layer b4 and the PCB board layer 5 are stacked in order to form a module A. Then put the laminated module A into the solar cell module laminating machine; then heat the auxiliary heating device of the solar cell module Atmospheric pressure, then immediately stop heating, to obtain component B;

Step 2. The solar cell module laminator draws out the air in the module B obtained in step 1 by vacuuming, and then heats it to 135°C to 145°C to make the ethylene-vinyl acetate copolymer layer a2 and the ethylene-vinyl acetate copolymer Layer b is melted, and the ethylene-tetrafluoroethylene copolymer layer 1, the solar cell layer 3 and the PCB board layer 5 are bonded together, and after heating and pressing for 15 minutes to 25 minutes, send it out of the solar cell module laminating machine Cavity to obtain crude solar cell components;

Step 3. After cooling the crude solar cell module obtained in step 2, remove the burrs, and then install the junction box 6 to obtain a solar cell module.

The solar cell layer 3 is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the solar cell module from top to bottom is: ethylene-tetrafluoroethylene copolymer layer 1 is 0.1 mm to 1 mm; ethylene-vinyl acetate copolymer layer a2 is 10 mm to 500 μm; solar cell layer 3 is 0.15 mm to 0.25 mm; The ethylene-vinyl acetate copolymer layer b4 is 10 mm to 500 μm; the PCB layer 5 is 1.0 mm to 1.5 mm.

Through the above method, in the solar cell module of the present invention, the battery slices are connected in series to increase the conversion efficiency of the overall electric energy; in the solar cell module of the present invention, ethylene-tetrafluoroethylene copolymer is laminated to the surface of the solar cell - The tetrafluoroethylene copolymer film layer has strong toughness, while maintaining good heat resistance, chemical resistance and electrical insulation performance, the radiation resistance and mechanical properties are greatly improved.

Example 1

Step 1. First, the ethylene-tetrafluoroethylene copolymer layer 1, the ethylene-vinyl acetate copolymer layer a2, the solar cell layer 3, the ethylene-vinyl acetate copolymer layer b4 and the PCB board layer 5 are stacked in order to form a module A. Then put the laminated module A into the solar cell module laminator; then heat the auxiliary heating device of the solar cell module laminator to 250°C and apply pressure by the solar cell module laminator, the pressure value is one atmosphere, Immediately thereafter, the heating was stopped to obtain component B;

Step 2. The solar cell module laminator extracts the air in the module B obtained in step 1 by vacuuming, and then heats to 135°C to melt the ethylene-vinyl acetate copolymer layer a2 and the ethylene-vinyl acetate copolymer layer b. , the ethylene-tetrafluoroethylene copolymer layer 1, the solar cell layer 3 and the PCB board layer 5 are bonded together, and after being heated and pressurized for 15 minutes, they are sent out of the cavity of the solar cell module laminating machine to obtain a solar cell crude components;

Step 3. After cooling the rough product of the solar cell module obtained in step 2, remove the burrs, and then install the junction box 6 to obtain the solar cell module.

The solar cell layer 3 is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the solar cell module from top to bottom is: ethylene-tetrafluoroethylene copolymer layer 1 is 0.1mm; ethylene-vinyl acetate copolymer layer a2 is 10mm; solar cell layer 3 is 0.15mm; ethylene-vinyl acetate copolymer layer b4 is 10mm; PCB layer 5 is 1.0mm.

Example 2

Step 1. First, the ethylene-tetrafluoroethylene copolymer layer 1, the ethylene-vinyl acetate copolymer layer a2, the solar cell layer 3, the ethylene-vinyl acetate copolymer layer b4 and the PCB board layer 5 are stacked in order to form a module A. Then put the laminated module A into the solar cell module laminator; then heat the auxiliary heating device of the solar cell module laminator to 255°C and apply pressure by the solar cell module laminator, the pressure value is one atmosphere, Immediately thereafter, the heating was stopped to obtain component B;

Step 2. The solar cell module laminator extracts the air in the module B obtained in step 1 by vacuuming, and then heats to 140°C to melt the ethylene-vinyl acetate copolymer layer a2 and the ethylene-vinyl acetate copolymer layer b , the ethylene-tetrafluoroethylene copolymer layer 1, the solar cell layer 3 and the PCB board layer 5 are bonded together, and after being heated and pressed for 20 minutes, they are sent out of the cavity of the solar cell module laminating machine to obtain a solar cell crude components;

Step 3. After cooling the crude solar cell module obtained in step 2, remove the burrs, and then install the junction box 6 to obtain a solar cell module.

The solar cell layer 3 is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the solar cell module from top to bottom is: ethylene-tetrafluoroethylene copolymer layer 1 is 0.2mm; ethylene-vinyl acetate copolymer layer a2 is 200μm; solar cell layer 3 is 0.2mm; ethylene-vinyl acetate copolymer layer b4 is 250 μm; PCB layer 5 is 1.2mm.

Example 3

Step 1. First, the ethylene-tetrafluoroethylene copolymer layer 1, the ethylene-vinyl acetate copolymer layer a2, the solar cell layer 3, the ethylene-vinyl acetate copolymer layer b4 and the PCB board layer 5 are stacked in order to form a module A. Then put the laminated module A into the solar cell module laminator; then heat the auxiliary heating device of the solar cell module laminator to 260°C and apply pressure by the solar cell module laminator, the pressure value is one atmosphere, Immediately thereafter, the heating was stopped to obtain component B;

Step 2. The solar cell module laminator extracts the air in the module B obtained in step 1 by vacuuming, and then heats to 138°C to melt the ethylene-vinyl acetate copolymer layer a2 and the ethylene-vinyl acetate copolymer layer b , the ethylene-tetrafluoroethylene copolymer layer 1, the solar cell layer 3 and the PCB board layer 5 are bonded together, and after being heated and pressurized for 18 minutes, they are sent out of the cavity of the solar cell module laminating machine to obtain a solar cell crude components;

Step 3. After cooling the rough product of the solar cell module obtained in step 2, remove the burrs, and then install the junction box 6 to obtain the solar cell module.

The solar cell layer 3 is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the solar cell module from top to bottom is: ethylene-tetrafluoroethylene copolymer layer 1 is 0.6mm; ethylene-vinyl acetate copolymer layer a2 is 100μm; solar cell layer 3 is 0.19mm; ethylene-vinyl acetate copolymer layer b4 is 120 μm; PCB layer 5 is 1.3mm.

Example 4

Step 1. First, stack the ethylene-tetrafluoroethylene copolymer layer 1, the ethylene-vinyl acetate copolymer layer a2, the solar cell layer 3, the ethylene-vinyl acetate copolymer layer b4, and the PCB board layer 5 in order to form a module A. Then put the laminated module A into the solar cell module laminator; then heat the auxiliary heating device of the solar cell module laminator to 261°C and apply pressure by the solar cell module laminator, the pressure value is one atmosphere, Immediately thereafter, the heating was stopped to obtain component B;

Step 2. The solar cell module laminator extracts the air in the module B obtained in step 1 by vacuuming, and then heats to 142°C to melt the ethylene-vinyl acetate copolymer layer a2 and the ethylene-vinyl acetate copolymer layer b , the ethylene-tetrafluoroethylene copolymer layer 1, the solar cell layer 3 and the PCB board layer 5 are bonded together, and after being heated and pressurized for 22 minutes, they are sent out of the cavity of the solar cell module laminating machine to obtain a solar cell crude components;

Step 3. After cooling the rough product of the solar cell module obtained in step 2, remove the burrs, and then install the junction box 6 to obtain the solar cell module.

The solar cell layer 3 is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the solar cell module from top to bottom is: ethylene-tetrafluoroethylene copolymer layer 1 is 0.7mm; ethylene-vinyl acetate copolymer layer a2 is 320μm; solar cell layer 3 is 0.2mm; ethylene-vinyl acetate copolymer layer b4 is 300 μm; PCB layer 5 is 1.4mm.

Example 5

Step 1. First, stack the ethylene-tetrafluoroethylene copolymer layer 1, the ethylene-vinyl acetate copolymer layer a2, the solar cell layer 3, the ethylene-vinyl acetate copolymer layer b4, and the PCB board layer 5 in order to form a module A. Then put the laminated module A into the solar cell module laminator; then heat the auxiliary heating device of the solar cell module laminator to 265°C and apply pressure by the solar cell module laminator, the pressure value is one atmosphere, Immediately thereafter, the heating was stopped to obtain component B;

Step 2. The solar cell module laminator extracts the air in the module B obtained in step 1 by vacuuming, and then heats to 145°C to melt the ethylene-vinyl acetate copolymer layer a2 and the ethylene-vinyl acetate copolymer layer b , the ethylene-tetrafluoroethylene copolymer layer 1, the solar cell layer 3 and the PCB board layer 5 are bonded together, and after being heated and pressurized for 25 minutes, they are sent out of the cavity of the solar cell module laminating machine to obtain a solar cell crude components;

Step 3. After cooling the crude solar cell module obtained in step 2, remove the burrs, and then install the junction box 6 to obtain a solar cell module.

The solar cell layer 3 is a monocrystalline silicon solar cell or a polycrystalline silicon solar cell.

The thickness of the solar cell module from top to bottom is: ethylene-tetrafluoroethylene copolymer layer 1 is 1 mm; ethylene-vinyl acetate copolymer layer a2 is 500 μm; solar cell layer 3 is 0.25 mm; ethylene-vinyl acetate copolymer layer b4 500μm; PCB layer 5 is 1.5mm.

Claims (6)

1. a kind of solar cell module, it is characterised in that the ethylene-tetrafluoroethylene including stacking gradually arrangement from top to bottom is total to Polymers layer (1), ethylene-vinyl acetate copolymer layer a (2), solar cell layer (3), ethylene-vinyl acetate copolymer layer b (4) And pcb board layer (5)；

The solar cell layer (3) is connected in series by multiple battery blade units, and pcb board (5) bottom margin, which is provided with, to be connect Line box (6), the both positive and negative polarity output of terminal box (6) the electrical connection solar cell layer (3).

2. a kind of solar cell module as claimed in claim 1, it is characterised in that the solar cell layer (3) is single Crystal silicon solar battery piece or polycrystalline silicon solar cell piece.

A kind of 3. solar cell module as claimed in claim 1, it is characterised in that the ethylene-tetrafluoroethylene copolymer The thickness of layer (1) is 0.1mm~1mm；The thickness of the ethylene-vinyl acetate copolymer layer a (2) is 10mm~500 μm；It is described The thickness of solar cell layer (3) is 0.15mm~0.25mm；The thickness of the ethylene-vinyl acetate copolymer layer b (4) is 10mm~500 μm；The thickness of the pcb board layer (5) is 1.0mm~1.5mm.

4. a kind of preparation method of solar cell module, it is characterised in that specifically include following steps：

Step 1, first by ethylene-tetrafluoroethylene copolymer layer (1), ethylene-vinyl acetate copolymer layer a (2), solar cell Layer (3), ethylene-vinyl acetate copolymer layer b (4) and pcb board layer (5) are laminated to form component A in order, then will be laminated Component A be put into solar module laminating machine；Then the assisted heating device of solar module laminating machine is added Pressure is applied by solar module laminating machine after hot to 250 DEG C~265 DEG C, pressure value is an atmospheric pressure, then at once Stop heating, obtain component B；

Step 2, solar module laminating machine are extracted out by vacuumizing the air in the component B that will be obtained through step 1, then 135 DEG C~145 DEG C are heated to, melts ethylene-vinyl acetate copolymer layer a (2) and ethylene-vinyl acetate copolymer layer b, will Ethylene-tetrafluoroethylene copolymer layer (1), solar cell layer (3) and pcb board layer (5) bond together, and keep temperature-pressure After time 15min~25min, solar module laminating machine chamber is sent out, obtains solar cell module crude product；

Step 3, carry out eliminating flash after the solar cell module crude product cooling for obtaining step 2, then load onto terminal box (6) solar cell module, is obtained.

A kind of 5. preparation method of solar cell module as claimed in claim 4, it is characterised in that the solar cell Layer (3) is single crystal silicon solar cell piece or polycrystalline silicon solar cell piece.

6. a kind of preparation method of solar cell module as claimed in claim 4, it is characterised in that in the step 3：Too From top to bottom thickness is respectively positive energy battery component：Ethylene-tetrafluoroethylene copolymer layer (1) is 0.1mm~1mm；Ethyl vinyl acetate Ethylene copolymer layer a (2) is 10mm~500 μm；Solar cell layer (3) is 0.15mm~0.25mm；Ethene-vinyl acetate is total to Polymers layer b (4) is 10mm~500 μm；Pcb board layer (5) is 1.0mm~1.5mm.