CN201217866Y - Double-sided photovoltaic cell curtain wall components - Google Patents

Abstract

The utility model relates to a double-side photovoltaic cell curtain wall assembly which belongs to the fields of photoelectricity and building material. The double-side photovoltaic cell curtain wall assembly comprises upper layer glass, bottom layer glass and a middle photovoltaic cell assembly and is characterized in that the photovoltaic cell assembly comprises at least a group of double-side solar energy cell pieces, each group of double-side solar energy cell pieces at least comprises a double-side solar energy cell piece, and the double-side solar energy cell pieces are connected by interconnecting bars, each group of double-side solar energy cell pieces is connected to a connecting box by omnibus bars, and the upper layer glass, the bottom layer glass and the double-side solar energy cell pieces are sealed and bound by EVA. The curtain wall assembly not only has the functional advantages of heat insulation, sound insulation, beautiful appearance, and the like, but also can generate electricity at the same time in a double-side electricity generation mode. Compared with the traditional curtain wall, the temperature of a room is further reduced in a heat insulation aspect, and the double-side cell is completely used for photoelectricity electricity generation.

Description

Double-sided photovoltaic cell curtain wall components

technical field

The utility model belongs to the field of optoelectronics and building materials, in particular to a double-sided photovoltaic cell curtain wall assembly, which is suitable for large-scale glass curtain wall buildings, parking lots, entertainment places and other buildings.

Background technique

Curtain wall components are a new type of building material that integrates power generation, sound insulation, heat insulation, safety, and decoration functions, fully embodying the intelligent and humanized characteristics of buildings.

Curtain wall components, that is, use special resin to paste solar cells on the glass, inlaid between two pieces of glass, and convert light energy into electrical energy through the cells. In addition to the main function of power generation, the photovoltaic curtain wall also has obvious functions such as heat insulation, sound insulation, safety, decoration, etc. In particular, solar cell power generation will not emit carbon dioxide or produce harmful gases to the greenhouse effect, and has no noise. Net energy, good compatibility with the environment. However, due to the high price, photoelectric curtain walls are mostly used on the roofs and exterior walls of landmark buildings.

At present, traditional curtain wall components use single-sided monocrystalline solar cells or polycrystalline solar cells in the selection of solar cells. The disadvantage of single-sided solar cells is that only one side can be used to collect sunlight and convert light energy Converted into electrical energy; but because the back is made of glass as the back plate, the glass is light-transmitting, and this single-sided battery can only use one side to generate electricity, so it is undoubtedly a waste to choose the back plate material .

Contents of the invention

In order to solve the above problems and make full use of resources, the utility model provides a double-sided photovoltaic cell curtain wall assembly using double-sided solar cells.

The double-sided photovoltaic cell curtain wall assembly described in the utility model includes an upper glass, a bottom glass and a photovoltaic cell assembly in the middle, and the photovoltaic cell assembly includes at least one set of double-sided solar cells, and each set of double-sided solar cells includes at least one Double-sided solar cells, wherein each double-sided solar cells are connected by interconnecting strips, and each group of double-sided solar cells is connected to the junction box by bus bars; upper glass, bottom glass and double-sided solar electromagnetic sheets EVA is used to seal and bond between them. EVA is an ethylene-vinyl acetate copolymer, so that the glass, EVA, and battery are completely bonded together, and the interior is evacuated to ensure the life of the components.

Bypass diodes are also connected between each group of double-sided solar cells, which solves the hot spot effect of the components.

The junction box is fixed with potting glue to ensure waterproofness.

Preferably, we set it as follows: the photovoltaic cell modules are arranged in 6 groups, and each group includes 10 double-sided solar cells, that is, there are 60 cells in total. The double-sided solar cells are double-sided monocrystalline silicon solar cells. The upper layer of glass is set to be ultra-clear tempered glass, because the ultra-clear tempered glass has high light transmittance, and at the same time, it can block part of the infrared and ultraviolet radiation, which can reduce the ultraviolet radiation and maintain the indoor temperature, while the lower layer is ordinary glass.

The utility model completely solves the application problem of the double-sided battery, and more comprehensively uses the double-sided battery in the photoelectric field. Double-sided solar cells, that is, the front and back sides of the cell, can generate corresponding power under the irradiation of light, thereby indirectly increasing the power of the photovoltaic module and improving the corresponding conversion efficiency of the single cell. During the day, under the sunlight, the sunlight is converted into electrical energy, and the electrical energy is stored in the battery for use by the load; at night, the solar cell on the opposite side absorbs the light in the room, converts it into electrical energy, and stores it in the battery for use by the load . Due to the use of double-sided cells, the power of the module is greatly increased.

This curtain wall component not only has functional characteristics such as heat insulation, sound insulation, and aesthetics, but also can generate electricity on both sides; compared with traditional curtain walls, it further reduces the temperature of the room in terms of heat insulation, and uses double-sided batteries more comprehensively. in photovoltaic power generation.

Description of drawings

Fig. 1 is the front view of the utility model embodiment;

Fig. 2 is the bottom view of the utility model embodiment;

Fig. 3 is a schematic circuit diagram of an embodiment of the utility model.

Among them, 1. is the upper glass, 2 is the lower glass, 3 is EVA, 4 is the bus bar, 5 is the interconnection bar, 6 is the battery sheet, 7 is the junction box, and 8 is the diode.

Detailed ways

The technical solution will be further explained and illustrated below with non-limiting examples.

A double-sided photovoltaic cell curtain wall assembly includes an upper glass, a bottom glass, and a photovoltaic cell assembly in the middle. The photovoltaic cell assembly includes 6 sets of double-sided solar cells, and each set of double-sided solar cells includes 10 double-sided solar cells. , where each double-sided solar cell is connected with interconnection strips, and each group of double-sided solar cells is connected to the junction box with a bus bar; the upper glass, the bottom glass and the double-sided solar electromagnetic sheet are sealed with EVA Bonding, EVA is a copolymer of ethylene-vinyl acetate, which makes the glass, EVA, and battery completely bonded together, and vacuumizes the interior to ensure the life of the components.

Bypass diodes are also connected between each group of double-sided solar cells, which solves the hot spot effect of the components.

The junction box is fixed with potting glue to ensure waterproofness.

The upper layer of glass is set to be ultra-clear tempered glass, because the ultra-clear tempered glass has high light transmittance, and at the same time, it can block part of the infrared and ultraviolet radiation, which can reduce the ultraviolet radiation and maintain the indoor temperature, while the lower layer is ordinary glass.

Cells can choose double-sided monocrystalline silicon solar cells with 15.0% conversion efficiency, using 60 cells, and the power of the packaged components is (at air quality AM1.5, temperature at 25°C, light intensity 1000W /m ² ) The front is 127W, the back is 70W, and the overall power is 197W. However, ordinary single-sided cell curtain wall components can only produce 130W with cells with this conversion efficiency. All, we have a power increase of 95W compared to this.

In application, because only one side can be used to generate electric energy, that is, when the front side is used, the back side is unavailable; when the back side is used, the front side is unavailable. Therefore, you can choose to use it as follows: during the day when there is sufficient light and generates a lot of power, choose to use it on the front side; at night, if there is light in the room, choose to use it on the reverse side.

Claims (6)

1. double side photovoltaic battery wall component, comprise upper strata glass, bottom glass and middle photovoltaic cell component, it is characterized in that: described photovoltaic cell component comprises at least one group of double-sided solar battery sheet, every group of double-sided solar battery sheet comprises a slice double-sided solar battery sheet at least, wherein connect with interconnector between each double-sided solar battery sheet, be connected to junction box with busbar between every group of double-sided solar battery sheet; Be sealing adhesive with EVA between upper strata glass, bottom glass and the double-sided solar electromagnetic plate.

2. double side photovoltaic battery wall component according to claim 1 is characterized in that: also be connected with bypass diode between described every group of double-sided solar battery sheet.

3. double side photovoltaic battery wall component according to claim 1 and 2 is characterized in that: the fixing edge with upper strata and bottom glass with casting glue of described junction box.

4. double side photovoltaic battery wall component according to claim 3 is characterized in that: described photovoltaic cell component is set to 6 groups, every group and comprises 10 double-sided solar battery sheets.

5. double side photovoltaic battery wall component according to claim 4 is characterized in that: described double-sided solar battery sheet is two-sided monocrystaline silicon solar cell sheet.

6. double side photovoltaic battery wall component according to claim 5 is characterized in that: described upper strata glass is set to ultrawhite tempered glass.

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