CN105870231B - The double glass photovoltaic curtain wall light-transmitting components of novel crystal silicon - Google Patents

Abstract

The invention belongs to the technical field of solar photovoltaics, and relates to a novel crystalline silicon double-glass photovoltaic curtain wall light-transmitting component, which includes a front glass and a back glass, and a power generation area and a light-transmitting area are arranged between the front glass and the back glass. The power generation area includes a battery pack and encapsulation layers arranged on both sides of the battery pack. Beneficial effects: the new patented component conforms to the structure of the human body, and the batteries are arranged in a centralized manner, and the arrangement of the batteries is changed. This design improves the light transmittance and the power generation efficiency at the same time. Moreover, the light-transmitting components of the double-glass photovoltaic curtain wall reduce the length of interconnection strips, save costs, make reasonable use of space, and increase light transmittance, so that the interior has good lighting and vision, and at the same time reduces packaging loss.

Description

New crystalline silicon double-glass photovoltaic curtain wall light-transmitting components

technical field

The invention belongs to the field of solar photovoltaic technology, and in particular relates to a light-transmitting component of a crystalline silicon double-glass photovoltaic curtain wall.

Background technique

BIPV (Building Integrated Photovoltaics) is a new concept of using solar energy to generate electricity in recent years. It lays photovoltaic arrays on the building envelope (walls, roofs) to generate electricity. This system has many advantages, such as effective use of the building's exterior surface, without additional land use or additional facilities; saving exterior materials (glass curtain walls, etc.), making the appearance more attractive; alleviating power demand; reducing summer air conditioning load, improving indoor heat environment etc. The contradiction between energy supply and demand in my country is becoming increasingly fierce. The new energy industry represented by photovoltaic power generation will take on the important task of solving energy problems. As a product that operates outdoors for a long time, the durability and stability of photovoltaic power generation systems directly affect the healthy development of the photovoltaic industry. Most of the known solar photovoltaic module structures use 6mm glass+EVA+cells+EVA+6mm glass, and the cells are evenly distributed in the photovoltaic module structure, but the light transmission of BIPV in the prior art is not good, which has a certain impact on the lighting in the building , resulting in insufficient indoor light and poor indoor vision.

Contents of the invention

The purpose of the present invention is to overcome the defects of BIPV in the prior art that the indoor light is insufficient and the indoor field of vision is not wide, and to provide a new type of light-transmitting component of a crystalline silicon double-glass photovoltaic curtain wall.

The technical solution adopted by the present invention to solve the technical problem is: a new type of crystalline silicon double-glass photovoltaic curtain wall light-transmitting component, including a front glass and a back glass, and a power generation area and a light-transmitting area are arranged between the front glass and the back glass. area, the power generation area includes a battery pack and packaging layers arranged on both sides of the battery pack.

Further, the battery pack is formed by connecting several battery strings, each battery is formed by connecting several battery slices, the back glass is provided with screen printing white paint, and the position of the screen printing white paint is adjacent to two Corresponding to the gap between the battery slices.

Preferably, the distance between two adjacent battery strings is 2-7mm, and the distance between two adjacent battery pieces in each battery string is 2-7mm.

Further, the distance between two adjacent power generation areas is 500-650 mm.

Preferably, in order to increase power generation efficiency, the surface of the front glass is coated with an anti-reflection film.

Specifically, the front glass is physically tempered glass or chemically tempered glass; its dimensions are as follows, the thickness is 0.5-10.0mm, the length of the long side is 1900mm-3000mm, and the length of the short side is 800mm-1500mm.

Specifically, the back glass is physically tempered glass or chemically tempered glass; its dimensions are as follows, the thickness is more than 5.0mm, the length of the long side is 1900mm-3000mm, and the length of the short side is 800mm-1500mm.

Beneficial effects: the new patented component conforms to the structure of the human body, and the batteries are arranged in a centralized manner, and the arrangement of the batteries is changed. This design improves the light transmittance and the power generation efficiency at the same time.

Moreover, the light-transmitting components of the double-glass photovoltaic curtain wall reduce the length of interconnection strips, save costs, make reasonable use of space, and increase light transmittance, so that the interior has good lighting and vision, and at the same time reduces packaging loss.

Description of drawings

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

Fig. 1 is a schematic structural diagram of a double-glass photovoltaic curtain wall light-transmitting component of the present invention;

Fig. 2 is a schematic diagram of the assembly structure of the double-glass photovoltaic curtain wall light-transmitting component of the present invention;

Figure 3 is a schematic diagram of the structure of the back glass;

Fig. 4 is an enlarged view of the local structure in Fig. 3;

Fig. 5 is a schematic diagram of the double-glass photovoltaic curtain wall light-transmitting component and building installation structure of the present invention.

Among them: 1. Front glass, 11. Power generation area, 12. Light transmission area, 2. Encapsulation layer, 3. Cell, 4. Back glass, 41. Screen printing white paint, 5. Adults, 6. Architecture, 7 . Ordinary double glass components.

Detailed ways

Example 1

As shown in Figures 1 to 4, the height of ordinary floors of building 6 is 2.7 meters, the distance between floors is 1.5 meters, the height of ordinary windows is 1.5 meters, and the height of 0.9 meters from the ground, and the height of ordinary adults 5 is 1.6 to 1.9 meters. According to the above . By calculating the relationship between the height of the human body and the curtain wall, the battery sheet 3 is arranged using the space outside the human body's field of vision, which reduces the use of interconnection strips while utilizing the space. Secondly, screen printing white paint 41 around the battery sheet 3 can increase the Power, more beautiful appearance.

As shown in Figures 1 to 4, a new type of crystalline silicon double-glass photovoltaic curtain wall light-transmitting component includes a front glass 1 and a back glass 4, and a power generation area 11 and a light-transmitting area are arranged between the front glass 1 and the back glass 4. area 12, the distance between two adjacent power generation areas 11 is 500-650 mm, that is, the width of the light-transmitting area 12, and the power generation area 11 includes a battery pack and encapsulation layers 2 arranged on both sides of the battery pack. The light-transmitting area 12 is set at the window position of the building 6 .

The battery pack is formed by connecting several battery strings, and each battery is formed by connecting several battery sheets 3, and the back glass 4 is provided with a screen printing white paint 41, and the position of the screen printing white paint 41 is in line with the corresponding It corresponds to the gap between two adjacent battery pieces 3 . The distance between two adjacent battery strings is 2-7 mm, and the distance between two adjacent battery slices 3 in each battery string is 2-7 mm.

The front glass 1 is physically toughened glass, and the surface of the front glass 1 is coated with an anti-reflection film; its dimensions are as follows, the thickness is 0.5-10.0mm, the length of the long side is 1900mm-3000mm, and the length of the short side is 800mm-1500mm.

The back glass 4 is physically tempered glass or chemically tempered glass; its dimensions are as follows, the thickness is more than 5.0mm, the length of the long side is 1900mm-3000mm, and the length of the short side is 800mm-1500mm.

Concrete structure is as follows in the present embodiment:

1. The light-transmitting tempered glass on the front panel is tempered glass with embossed coating, the size is 1900mm*860mm, the thickness is 2mm, and the surface stress after tempering is above 40Mpa.

2. The packaging material adopts 0.76mm PVB, and adopts 2+2 (two layers of packaging layer 2 near the front glass 1, and one layer of packaging layer 2 near the back glass 4) lamination method.

3. The cells 3 are high-efficiency cells 3 with a size of 156*156mm, 5 cells in each string, and a cell spacing of 3mm. The string spacing in each power generation area 11 is 4mm. Two power generation areas 11 are set in each module ( They are respectively located at both ends of the front glass 1 and the back glass 4), and the light transmission area 12 is between the two power generation areas 11. The distance between the edge of area 11 and the edge of front glass 1 or back glass 4 is: 15 mm from the head and tail to the edge, and 34 mm from the left and right to the edge.

4. Print white paint 41 on the back glass 4 around the battery sheet 3, as shown in FIGS. 3 and 4 .

5. The light-transmitting tempered glass on the back panel is tempered glass with embossed coating, the size is 1900mm*860mm, the thickness is 8mm, and the surface stress after tempering is above 40Mpa.

6. The wiring adopts a split junction box, and the junction box is bonded to the back glass 4.

After adopting above-mentioned structure, beneficial effect is as follows:

1. Save material. Common double-glass module 7 (the number of cells 3 and the distance between cells 3 are the same as in this embodiment) requires interconnection bars of 12680 mm and bus bars of 2954 mm. According to Figures 1 and 2 (the new light-transmitting Type components) need to use interconnection bar 11770mm, bus bar 2767mm. Save interconnection bar 910mm, bus bar 187mm. According to the fact that 1MW power station needs about 5,500 components, it can save 5,005m of interconnection bars and 1,028.5m of bus bars.

2. To increase the power, the light transmittance of both traditional components and new components is 40%.

The power is increased by 0.7w, and the sealing loss value (CTML) is reduced by 0.1%.

3. Good lighting and wide field of vision. As shown in Figure 5, a light-transmitting area 12 is set at the window of the building 6, and an ordinary double-glass component 7 (no transparency) is set between two adjacent information crystal silicon double-glass photovoltaic curtain wall light-transmitting components. light area) (building 6 wall non-window area (the cavity between the building 6 floors and layers) is set) to achieve good lighting effects, and the adult 5 has an unrestricted field of vision and has a good field of vision.

It should be understood that the specific embodiments described above are only used to explain the present invention, not to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (6)

1. A novel crystalline silicon double-glass photovoltaic curtain wall light-transmitting component is characterized in that: it comprises a front glass (1) and a back glass (4), and an interval between the front glass (1) and the back glass (4) is provided with A power generation area (11) and a light transmission area (12), the power generation area (11) includes a battery pack and packaging layers (2) arranged on both sides of the battery pack, and the light transmission area (12) is arranged on the location of the windows of the building (6); The battery pack is formed by connecting several battery strings, each battery is formed by connecting several battery pieces (3), the back glass (4) is provided with screen printing white paint (41), and the screen printing white paint (41) is The position of the paint (41) corresponds to the gap between two adjacent battery sheets (3); the light-transmitting area (12) is a blank area. 2. The new crystalline silicon double-glass photovoltaic curtain wall light-transmitting component according to claim 1, characterized in that: the distance between two adjacent battery strings is 2-7 mm, and the adjacent two battery strings in each group of battery strings The distance between the battery pieces (3) is 2-7mm. 3. The novel crystalline silicon double-glass photovoltaic curtain wall light-transmitting component according to claim 1, characterized in that the distance between two adjacent power generation areas (11) is 500-650 mm. 4. The novel crystalline silicon double-glass photovoltaic curtain wall light-transmitting component according to claim 1, characterized in that: the surface of the front glass (1) is coated with an anti-reflection film. 5. The new crystalline silicon double-glass photovoltaic curtain wall light-transmitting component according to claim 1, characterized in that: the front glass (1) is physically tempered glass or chemically tempered glass; its dimensions are as follows, and the thickness is 0.5-10.0 mm, the length of the long side is 1900mm~3000mm, and the length of the short side is 800mm~1500mm. 6. The new crystalline silicon double-glass photovoltaic curtain wall light-transmitting component according to claim 1, characterized in that: the back glass (4) is physically tempered glass or chemically tempered glass; its dimensions are as follows, and the thickness is more than 5.0mm , the length of the long side is 1900mm ~ 3000mm, and the length of the short side is 800mm ~ 1500mm.