CN107808907A - A kind of photovoltaic module for solar power system - Google Patents

Abstract

The invention provides a photovoltaic module for a solar power generation system, the photovoltaic module for a solar power generation system includes light-transmitting glass, a solar cell, a packaging material, a backplane, a junction box, screw holes, a hook, and a connecting strip; Wherein, the light-transmitting glass, the solar cell and the back sheet are laminated by the encapsulation material to form a component laminate, and the order from top to bottom is the light-transmission glass, the encapsulation material, the solar cell, the encapsulation material, and the back sheet. The invention has a simple structure, can be large or small, and is flexible and convenient to install. On the one hand, the roof power generation unit can be changed to a suitable size according to customer needs; red roof. At the same time, the system has a waterproof function, and there are cooling channels at the bottom of the system, which can stabilize the power generation efficiency and prolong the service life and safety reliability of the power generation system.

Description

A photovoltaic module for solar power generation system

technical field

The present invention relates to a photovoltaic module, in particular to a photovoltaic module used in a solar power generation system, in particular to a new type of photovoltaic cell power generation panel for a future rooftop solar power generation system.

Background technique

Since 2001, the technology center and application center of the world's photovoltaic industry is Germany. From 2005 to 2015, more than 60% of all products in the world's photovoltaic industry chain were manufactured in China, and private enterprises were the absolute main force. In 2013, the United States and the European Union launched an anti-China trade war, which forced China's export market to shrink rapidly. The industry leader, Wuxi Suntech, declared bankruptcy and reorganization in 2014.

In 2013, the Chinese government began to vigorously encourage the development of photovoltaics, which started an upsurge in the installation of ground-mounted photovoltaic power stations. The installation of photovoltaics quickly rose to the first place in the world. The five western provinces are now experiencing an unprecedented "enclosure" movement. However, the weak technology research and development system, the impetuous people's impetuousness, and the world's big copy, that is, the confusion and profiteering of a large number of private enterprises, have caused large-scale quality problems and accidents in photovoltaic power plants that have only been installed for 2 to 3 years, causing serious problems. Political and business chain reaction. Moreover, there is no matching intelligent deployment grid to receive photovoltaic power in the western region where large-scale power stations are densely populated. There is a shortage of large-scale power demand enterprises, and it is not cost-effective to transmit electricity from west to east. Now it is starting to advocate self-use, local consumption, and continuous reduction of subsidies.

At present, the photovoltaic power generation system designed and constructed based on the roof of the building is generally fixed and installed on the roof of the building through a positioning frame, and the area of the battery panel is relatively large and heavy, with a single piece of 1.6mm, an average of 19-20Kg/piece, installation and construction At the same time, the existing components need to be reinforced on the roof during installation, which will damage the existing waterproof layer or insulation layer of the roof. General factory roofs, color steel tiles or structural roofs, tiled common modules have low power generation efficiency, and dust is easy to accumulate, which affects the stability of power generation efficiency.

After more than ten years of turbulence, the domestic photovoltaic industry has begun to mature and rationalize. Around 2014, China began to try the personal home photovoltaic power station commonly used by German families. However, since the components used in large-scale power stations are not suitable for the roofs of homes or high-rise buildings in most areas of China, they are restricted by conditions such as roof shape and area size, load-bearing capacity, grid-connected conditions, product and construction quality, and subjective perception. The year 2014 is the first year of China's photovoltaic distributed development, which has not yet appeared.

The National Thirteenth Five-Year Plan has also introduced various preferential policies to encourage the development of photovoltaic distributed energy. For example, the Beijing Development and Reform Commission held the Beijing Photovoltaic Power Generation Incentive Measures and New Energy Utilization Conference on October 14, 2015, stipulating that for distributed photovoltaic power generation projects connected to the grid during A reward of 0.3 yuan (including tax) per kilowatt-hour for power generation will be awarded for 5 consecutive years. Since last year, the country has started to promote photovoltaic poverty alleviation and drive local subsidies, which has promoted the development of distributed photovoltaics and technological progress to a certain extent. However, technical problems still exist, and only fundamental solutions can truly promote the healthy development of the photovoltaic industry.

Contents of the invention

In order to solve the problems in the prior art, such as relatively large and heavy battery panels, installation and construction are difficult. At the same time, the existing components need to be reinforced on the roof during installation, which will damage the existing waterproof layer or insulation layer of the roof. To overcome the shortcomings, the present invention provides a new type of photovoltaic module for future integrated roof solar power generation system.

The photovoltaic module for a solar power generation system includes light-transmitting glass, solar cells, packaging materials, backplanes, junction boxes, screw holes, hooks, and connecting strips; wherein, the light-transmitting glass, solar cells and backplanes pass through the The encapsulation materials are stacked to form a component laminate, the encapsulation material includes the first encapsulation material and the second encapsulation material, from top to bottom are light-transmitting glass, the first encapsulation material, solar cells, the second encapsulation material, and the backplane .

Wherein, the light-transmitting glass is tempered glass coated with an anti-reflection film and has a suede surface, the transmittance of the tempered glass is >95%, and the thickness is 1.0 mm to 4.5 mm.

Wherein, the solar cell is a crystalline silicon cell, and is a square cell, and the side length of the square cell is 20 mm to 250 mm.

Wherein, the encapsulation material is POE polyolefin material; the solar cell is sealed in the middle by the encapsulation material.

Wherein, the backboard material is a PAPPPA 3-layer co-extruded backboard with a thickness of 0.4mm and a compression resistance of 1500V.

Wherein, the junction box is connected to the external connector through wires, and leads out the current in the component laminate.

Wherein, the fixing device includes a screw hole located at one corner of the component and two hooks that form a triangle with the screw hole.

Wherein, the hook is 20-35mm wide, the long side is attached to the backboard, and the short side faces outward.

Wherein, the connecting strip is pasted on the other two sides of the component away from the screw holes.

Wherein, it is characterized in that the size of the photovoltaic module is at least ^0.25m2 or more.

Through the above-mentioned technical scheme of the present invention, the following technical effects are obtained: the structure of the invention is simple, the volume can be large or small, and the installation is flexible and convenient. The overall color of the roof solar power generation system, such as the red roof that Chinese people generally like. At the same time, the system has a waterproof function, and there are cooling channels at the bottom of the system, which can stabilize the power generation efficiency and prolong the service life and safety reliability of the power generation system.

Description of drawings

Figure 1A is a top view of the photovoltaic module of the present invention;

Figure 1B is a bottom view of the photovoltaic module of the present invention;

Fig. 1C is a schematic structural view of the photovoltaic module of the present invention;

Fig. 2 is a schematic diagram of the installation of the waterproof top of the photovoltaic module of the present invention;

Fig. 3 is a schematic diagram of heat dissipation at the bottom of the photovoltaic module of the present invention.

Detailed ways

The photovoltaic module used in the solar power generation system provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can also adopt other alternative ways to implement for some known technologies; and the accompanying drawings It is only for more specific description of the embodiments, but not intended to specifically limit the present invention.

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

Firstly, the photovoltaic module for solar power generation system of the present invention will be described with reference to FIGS. 1A-1C . As shown in FIG. 1 , in one embodiment, the photovoltaic module used in a solar power generation system includes light-transmitting glass 1 , solar cells 2 , encapsulation material 3 , backplane 4 , junction box 5 , screw holes 6 , and hooks 7 , connecting bar 8. The light-transmitting glass 1 , the solar cell 2 and the back sheet 4 are laminated through a lamination process through the encapsulation material 3 to form a component laminate, and the encapsulation material includes a first encapsulation material and a second encapsulation material. From top to bottom are light-transmitting glass, first encapsulation material, solar cell, second encapsulation material, and backplane. The first encapsulation material is the same as the second encapsulation material.

In a preferred embodiment, the light-transmitting glass 1 is low-iron strengthened ultra-clear tempered glass coated with an anti-reflection film on the surface, and the tempered glass has a special suede on the surface that can increase the transmittance of visible light, and the transmittance is >95%. Its thickness is 1.0mm to 4.5mm, preferably 3mm±0.2mm.

In a preferred embodiment, the surface color of the solar cell 2 is black. In addition, solar cells are crystalline silicon cells of various sizes for photovoltaic modules (including monocrystalline silicon and polycrystalline silicon solar cells), as well as compound semiconductor photovoltaic cells such as gallium arsenide and copper indium gallium selenide. The size of the square battery is 20mm to 250mm side length, suitable for various chamfers of monocrystalline silicon ( etc.); and batteries of various colors, such as the SiNx film on the surface of single and polycrystalline silicon batteries presents dark blue, black, brick red, purple, deep red, etc.

In a preferred embodiment, the packaging material 3 is made of POE polyolefin, and its color is the same as that of the battery, which is also black. The packaging material is polyolefin such as EVA or POE or other polymer materials. According to the addition of different color additives, it can present uniform colors such as dark blue, black, brick red, purple, and dark red. The solar cells are sealed in the middle as a protective layer through a lamination process under temperature and vacuum conditions.

In a preferred embodiment, the backsheet material 4 is a PAPPPA 3-layer co-extruded backsheet with a thickness of 0.4mm and a compression resistance of 1500V. The backsheet refers to DuPont TPT, TPE, KPE and other composite backsheets, and PA and other co-extruded backsheets. Withstand voltage above 1000V.

In a preferred embodiment, the junction box refers to a junction box containing smart chips that can collect the current of the solar cells inside the module and superimpose the voltage, and can effectively avoid the hot spot effect. Generally, the number of diodes is 1 to 10 indivual. The junction box 5 leads out the current in the laminate and connects the external MC4 connector.

In a preferred embodiment, the fixing device includes a screw hole located at one corner of the component and two hooks that are triangular with the screw hole. The screw hole is convenient for fixing the component to a bracket system or a wooden structure with set screws Among them, the hanging component is to directly hang the component on the bracket. The diameter of the screw hole is 2-28 mm. The shape of the hook is shown in Figure 1C. The material is generally aluminum alloy or hard plastic, and it is glued to the backboard. The screw hole 6 is located at one corner of the component, and the vertical distance from the two sides where the top corner is located is 50mm, and the diameter of the screw hole is 5mm±0.1mm.

In a preferred embodiment, the hook is 20-35mm wide, the long side is attached to the backboard, the short side faces outward, the length of the short side is about 35-60mm, and the long side is about 80mm, made of aluminum alloy. The position of the hanging member is at the quarter point of the diagonal of the component that does not pass through the circular screw hole, as shown in Figure 1.

In a preferred embodiment, on the other two sides of the component away from the screw holes, a long connecting strip is pasted, and the connecting strip plays the role of sealing, waterproofing and buffering. Because the new type of future roof solar power generation system described in the present invention is to combine the components of the present invention together by crimping, the connecting strip is needed for buffering and sealing to prevent mechanical damage of the component system and rainwater intrusion. The connecting strip 8 is a rubber product. The connecting strip is hollow and has a gasket on the outer edge, which can play a buffer role when the components are bonded together, and prevent rainwater from entering the roof structure when it rains, so as to play a waterproof and rainproof role.

In a preferred embodiment, the size of the photovoltaic module is at least ^0.25m2 .

The photovoltaic module used in the solar power generation system provided by the present invention is especially a new type of photovoltaic module for the future integrated roof solar power generation system. The roof power generation unit becomes an appropriate size, and on the other hand, the overall color of the roof solar power generation system can be changed, such as the popular red roof. At the same time, the system has a waterproof function. As shown in Figure 2, rainwater can flow to the sealed photovoltaic panel glass on the roof through the drainage holes and flow down.

In a preferred embodiment, as shown in FIG. 3 , the bottom of the photovoltaic module has a cooling channel, so as to provide more stable power generation efficiency, prolong the service life and safety and reliability of the power generation system.

Finally, it should be noted that the above embodiments are only used to describe the technical solutions of the present invention rather than limit the technical methods of the present invention. The present invention can be extended to other modifications, changes, applications and embodiments in application, and therefore it is considered that all such Modifications, changes, applications, and embodiments are all within the spirit and teaching scope of the present invention.

Claims (10)

1. A photovoltaic module for a solar power generation system, comprising light-transmitting glass and solar cells, characterized in that the photovoltaic module also includes packaging materials, backplanes, junction boxes, screw holes, hooks, and connecting strips; Wherein, the light-transmitting glass, the solar cell and the back sheet are laminated through the encapsulation material to form a component laminate, and the encapsulation material includes a first encapsulation material and a second encapsulation material, and the component laminate is composed of the above The bottom is light-transmitting glass, the first encapsulation material, the solar cell, the second encapsulation material, and the backplane. 2. The photovoltaic module according to claim 1, wherein the light-transmitting glass is tempered glass coated with an anti-reflection film and has a suede surface, the light transmittance of the tempered glass is >95%, and the thickness is 1.0mm to 4.5mm. 3 . The photovoltaic module according to claim 1 , wherein the solar cell is a crystalline silicon cell and is a square cell, and the side length of the square cell is 20 mm to 250 mm. 4 . 4 . The photovoltaic module according to claim 1 , wherein the encapsulation material is made of POE polyolefin; and the solar cells are sealed in the middle by the encapsulation material. 5 . The photovoltaic module according to claim 1 , wherein the backsheet material is a PAPPPA 3-layer co-extruded backsheet with a thickness of 0.4mm and a compression resistance of 1500V. 6 . The photovoltaic module according to claim 1 , wherein the junction box is connected to the external joint through a wire, and leads out the current in the module laminate. 7 . 7 . The photovoltaic module according to claim 1 , wherein the fixing device comprises a screw hole located at a corner of the module and two hooks that form a triangle with the screw hole. 8 . 8 . The photovoltaic module according to claim 7 , wherein the hook is 20-35 mm wide, the long side is attached to the back plate, and the short side faces outward. 9 . The photovoltaic module according to claim 1 , wherein the connecting strips are pasted on the other two sides of the module away from the screw holes. 10. The photovoltaic module according to any one of claims 1-9, characterized in that the size of the photovoltaic module is at least 0.25 m ² or more.