CN202058756U - Building integrated photovoltaic (BIPV) solar cell component - Google Patents

Abstract

The utility model discloses a BIPV solar cell assembly. The solar cell assembly adopts an ultra-thin sheet diode as a bypass diode, so that the ultra-thin sheet diode can be directly fixed on the edge of the bottom surface of tempered glass, thereby eliminating the need for additional The use of a junction box saves costs; at the same time, the cable interface of the solar cell module is integrated in the top aluminum alloy frame, which facilitates the modular connection between adjacent solar cell modules, making BIPV installation faster and more convenient , further reducing the system cost; and the back plate of the solar cell module is transparent, so it does not affect the light transmittance in the building interior.

Description

A building photovoltaic integrated solar cell module

technical field

The utility model relates to the field of solar photovoltaic technology, in particular to a building photovoltaic integrated solar cell assembly.

Background technique

In view of the limitation of conventional energy supply and the increasing pressure of environmental protection, many countries in the world have set off an upsurge in the development and utilization of new energy. Among the new energy sources, solar energy is a clean, non-polluting, inexhaustible green energy. All countries in the world attach great importance to it and have done a lot of research. In today's world where energy is increasingly scarce, solar energy has Very broad development prospects.

A solar cell module is an indivisible minimum solar cell combination device with packaging and internal connections, which can provide direct current output alone. Solar cell modules (also known as solar panels) are the core part of the solar power generation system and the most valuable part of the solar power generation system. . The quality and cost of solar cell components will directly determine the quality and cost of the entire system.

Building Integrated Photovoltaic (BIPV, Building Integrated Photovolta-ic) is a new concept of applying solar power generation. Simply put, it is to install solar photovoltaic power generation arrays on the outer surface of the building envelope to provide electricity. Because BIPV has many advantages such as high efficiency, economy, and environmental protection, it has become a hot research topic at present.

Generally speaking, a traditional BIPV solar cell module includes from top to bottom: tempered glass, the first layer of EVA (ethylene-vinyl acetate material), the main body of power generation (also known as the cell array), the second layer of EVA and the back Tempered glass, junction box; the power generation body is bonded to the tempered glass through the first layer of EVA, and the back tempered glass is bonded to the power generation body through the second layer of EVA. The electrodes of the power generation main body are led out from the edge of the battery assembly, enter the junction box located at the edge of the battery assembly, connect through the traditional Schottky diode located in the junction box, and then lead it out through a special cable interface, and pass through the aluminum alloy The frame is encapsulated, sealed and fixed as a whole. At the same time, the main body of power generation is usually composed of a plurality of solar cells (generally 60) connected in series.

However, during the use of solar cell components, due to the obstruction of buildings, trees, and surface dirt, there will be shadows on the components in many cases. At this time, the solar cells in the shadows will be used as loads to consume other solar cells. The energy is converted into heat, that is, the hot spot effect, which can cause yellowing of EVA in light cases, and cause short-term failure of solar cells in severe cases.

In order to solve the above problems, the current approach is to connect a bypass diode in parallel between several solar cells, usually every 20 or 24 solar cells share a bypass diode, and the bypass diode is blocked by the solar cell module. Conduction when hot spot effect occurs, so as to prevent damage to solar cell modules.

However, since the bypass diodes used in the prior art usually have a columnar structure and are relatively thick, they are easily damaged; in order to protect the bypass diodes and dissipate the heat generated by the bypass diodes in a timely manner, wiring box. The junction box is installed on the top edge of the solar cell module, the bypass diode is installed inside the junction box, and the positive and negative poles of the solar cell module are led out by two cables outside the junction box.

The use of bypass diodes can effectively solve the hot spot effect of solar cell components. However, due to the need to use a junction box, the cost of solar cell components is greatly increased; the positive and negative poles of BIPV solar cell components are located at the top edge, so It brings inconvenience to the connection between adjacent solar battery modules. Moreover, the transparency of the back sheet of the current BIPV solar cell module is not high, thus affecting the light transmittance of the building.

Therefore, it is necessary to improve the existing BIPV solar cell components.

Utility model content

The purpose of the utility model is to provide a BIPV solar cell assembly, thereby saving costs.

In order to solve the above problems, the utility model proposes a BIPV solar cell assembly, which includes tempered glass, a first layer of EVA, a cell square array, a second layer of EVA and a back plate from top to bottom, and its characteristics That is, it also includes an ultra-thin chip diode, a first aluminum alloy frame and a second aluminum alloy frame integrated with a cable interface, the ultra-thin chip diode is located on the edge of the tempered glass bottom surface and connected in parallel to the battery sheet Between a plurality of solar cells in the square array; the second aluminum alloy frame is located on the top of the cell square array, leading out the positive and negative electrodes of the cell square array; the first aluminum alloy frame will The tempered glass is sealed and packaged with the backplane; and the backplane is transparent.

Optionally, the thickness of the ultra-thin chip diode is no more than 1mm.

Optionally, the ultra-thin chip diode is a Schottky diode.

Optionally, the pins of the Schottky diode can be bent.

Optionally, the back panel is tempered glass.

Compared with the prior art, the utility model has the following advantages and positive effects due to the adoption of the above technical scheme:

(1) Since the ultra-thin chip diode provided by the utility model can be installed on the edge of the tempered glass bottom surface, compared with the traditional solar cell module, no junction box needs to be installed, which reduces the cost;

(2) Since the cable interface of the BIPV solar cell module provided by the utility model is integrated in the second aluminum alloy frame at the top, it can facilitate the modular connection between adjacent components, save a large amount of use of cables, and make the photovoltaic Building integrated installation is faster and more convenient, reducing system cost;

(3) Since the BIPV solar cell module provided by the utility model does not need a junction box, the thickness of the aluminum alloy frame can be relatively thinner, thereby saving the use of aluminum alloy and further reducing the cost;

(4) Since the back plate of the BIPV solar cell module provided by the utility model is transparent, it does not affect the indoor light transmittance of the building.

Description of drawings

Fig. 1 is the front schematic view of the BIPV solar cell assembly provided by the embodiment of the utility model;

Fig. 2 is the schematic diagram of the back side of the BIPV solar cell assembly provided by the embodiment of the utility model;

Fig. 3 is the top schematic diagram of the BIPV solar cell assembly provided by the embodiment of the present invention;

Fig. 4 is a schematic diagram of the connection of the ultra-thin chip Schottky diode provided by the embodiment of the present invention.

Detailed ways

The BIPV solar cell assembly proposed by the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the utility model will be more clear. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiment of the present utility model.

The core idea of the present invention is to provide a BIPV solar cell assembly, the solar cell assembly uses ultra-thin sheet diodes as bypass diodes, so that the ultra-thin sheet diodes can be directly fixed on the edge of the tempered glass bottom surface, Therefore, there is no need to use an additional junction box, which saves costs; at the same time, the cable interface of the solar cell module is integrated in the top aluminum alloy frame, so that the modular connection between adjacent solar cell modules can be facilitated, making photovoltaic building integration The installation is quicker and more convenient, and the system cost is further reduced; and the back plate of the solar battery module is transparent, so it does not affect the light transmittance in the interior of the building.

Please refer to Fig. 1 to Fig. 4, among them, Fig. 1 is the front schematic view of the solar cell module provided by the embodiment of the utility model, Fig. 2 is the rear schematic view of the solar cell component provided by the embodiment of the utility model, Fig. 3 is the schematic diagram of the utility model The top schematic diagram of the solar cell assembly provided by the embodiment, Fig. 4 is a schematic diagram of the connection of the ultra-thin sheet Schottky diode provided by the embodiment of the present invention, as shown in Fig. 1 to Fig. 4, the solar cell provided by the embodiment of the present invention The components include tempered glass 1, the first layer of EVA, the cell array 2, the second layer of EVA3 and the back plate 4 from top to bottom, and also include ultra-thin chip diodes 6, the first aluminum alloy frame 5 and integrated The second aluminum alloy frame 7 of the cable interface, the ultra-thin sheet diode 6 is located on the edge of the bottom surface of the tempered glass 1, and is connected in parallel between a plurality of solar cells in the cell array 2; the The second aluminum alloy frame 7 is located on the top of the cell array 2, leading out the positive and negative electrodes of the cell array 2; the first aluminum alloy frame 5 connects the tempered glass 1 to the back plate 4 is sealed and packaged; and the backplane 4 is transparent.

Further, the thickness of the ultra-thin chip diode 6 is not more than 1 mm.

Further, the ultra-thin chip diode 6 is a Schottky diode; it should be noted that the utility model is not limited to this, and other types of diodes can also be used, as long as it is an ultra-thin chip structure .

Further, the pins of the Schottky diode 6 can be bent. It should be noted that the thickness of the pin is also ultra-thin, and its thickness does not exceed 1 mm.

Further, the back plate 4 is tempered glass; however, the present invention is not limited thereto, as long as the back plate is a transparent material that can transmit light.

To sum up, the utility model provides a BIPV solar cell assembly, the solar cell assembly uses ultra-thin chip diodes as bypass diodes, so that the ultra-thin chip diodes can be directly fixed on the edge of the tempered glass bottom surface , so that there is no need to use an additional junction box, saving costs; at the same time, the cable interface of the solar cell module is integrated in the top aluminum alloy frame, which can facilitate the modular connection between adjacent solar cell modules, making the photovoltaic building integrated The installation is quicker and more convenient, and the system cost is further reduced; and the back plate of the solar battery module is transparent, so it does not affect the light transmittance of the building interior.

Apparently, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (5)

1. A building-integrated photovoltaic solar cell module, which includes tempered glass, the first layer of EVA, a cell array, the second layer of EVA and a back plate from top to bottom, and is characterized in that it also includes ultra-thin chip diodes , a first aluminum alloy frame and a second aluminum alloy frame integrated with a cable interface, the ultra-thin chip diode is located on the edge of the bottom surface of the tempered glass, and is connected in parallel to a plurality of solar cells in the square array of cells Between; the second aluminum alloy frame is located on the top of the cell array, leading out the positive and negative electrodes of the cell array; the first aluminum alloy frame connects the tempered glass and the back plate Hermetic packaging is performed; and the backplane is transparent. 2. The building-integrated photovoltaic solar cell module according to claim 1, wherein the thickness of the ultra-thin chip diode is no more than 1mm. 3. The building-integrated photovoltaic solar cell module according to claim 2, wherein the ultra-thin chip diode is a Schottky diode. 4. The building-integrated photovoltaic solar cell module according to claim 3, characterized in that the pins of the Schottky diode can be bent. 5. The building-integrated photovoltaic solar cell module according to claim 1, wherein the back plate is tempered glass.

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