CN203242650U - Bifacial solar cell module - Google Patents

Abstract

The utility model discloses a double-sided solar cell assembly, which comprises glass, an upper layer of adhesive film, a battery sheet group, a lower layer of adhesive film and a transparent back plate from top to bottom, and also includes a frame and a junction box. The upper layer of adhesive film is The ultraviolet light is highly transparent packaging adhesive film, and the lower layer adhesive film is an ultraviolet light cut-off adhesive film; the junction box is arranged on the side of the frame. The utility model uses an ultraviolet light permeable packaging film on the front of the module, which increases the ultraviolet light irradiated on the battery from the front, and the output power of the front module is increased by more than 1.5%, thereby relatively reducing the installation space of the power station with the same power.

Description

A double-sided solar cell module

technical field

The utility model relates to a double-sided solar cell assembly, which belongs to the field of solar energy.

Background technique

Conventional fossil fuels are increasingly depleted. Among all sustainable energy sources, solar energy is undoubtedly the cleanest, most common and most potential alternative energy source. Therefore, solar cell modules have been widely concerned and developed by countries all over the world.

At present, the cells used in common solar crystalline silicon and amorphous silicon cell components are single-sided light-receiving and power-generating cells, and the corresponding packaging method is also single-sided transparent packaging. In order to reduce the installation area required by solar cell components and improve the power generation efficiency of solar cells, double-sided solar cell components have emerged.

In order to utilize the double-sided light, the module should be designed as a transparent structure on both sides. At present, there are mainly two structures: glass + transparent backplane, and glass + glass. Starting from reducing the weight of the components, the components of the first structure are lighter in weight and have a wider application space. However, in the existing technology, in order to prevent the yellowing of the transparent backplane, the packaging materials on both sides of the transparent backplane are made of ultraviolet cut-off packaging materials. With the advancement of cell technology, its power generation capacity in the ultraviolet band has been increased. In order to give full play to the power generation capacity of the battery and at the same time prevent the yellowing of the backplane, it is necessary to design a new type of solar cell module that reasonably utilizes ultraviolet light. .

In addition, in the existing technology, most of the junction boxes are directly installed on the backplane of the module, which not only weakens the light receiving ability of the backside of the battery where it is covered, but also produces hot spots, which reduces the actual service life of the module.

Contents of the invention

The purpose of the utility model is to provide a double-sided solar cell assembly.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a double-sided solar cell module, which sequentially includes glass, upper layer of adhesive film, cell group, lower layer of adhesive film and transparent back plate from top to bottom, and also includes frame and For the junction box, the upper adhesive film is a high-transparency packaging adhesive film for ultraviolet light, and the lower adhesive film is an ultraviolet cut-off adhesive film; the junction box is arranged on the side of the frame.

In the above, the ultraviolet light high-transparency packaging adhesive film can adopt existing commercially available products, such as the F406 adhesive film produced by Hangzhou Foster Photovoltaic Materials Co., Ltd.; the ultraviolet light cut-off adhesive film can adopt existing commercially available products. Products for sale, such as the F806 adhesive film produced by Hangzhou Foster Photovoltaic Materials Co., Ltd. Preferably, the upper and lower adhesive films are a combination of EVA with high UV transmittance and UV cut-off EVA.

The battery slices in the battery slice group can be double-sided power generation monocrystalline cells or double-sided power generation polycrystalline cells, and the battery slices can be connected by pre-pressed Z-shaped welding ribbons.

The transparent backplane can adopt transparent TPT, transparent TPE, transparent KPK, transparent KPE, transparent PET and other structures. Preferably, the back plate is a transparent TPE structure.

In the above technical solution, the frame is a composite material frame.

Preferably, the frame is a polyurethane frame.

In the above technical solution, a through hole is provided on one side of the frame, and the bus strip of the battery pack is electrically connected to the junction box through the through hole. That is, a hole is opened on one of the short frames of the frame, and the above-mentioned battery sheet group is welded with a busbar, and the busbar is connected to the junction box through the hole in the frame, and the junction box is installed on the short side frame of the module.

Due to the use of the above technical solutions, the utility model has the following advantages compared with the prior art:

1. The design of this utility model has obtained a new double-sided solar cell module. The ultraviolet light permeable packaging film is used on the front of the module, which increases the ultraviolet light irradiated on the battery from the front, and the output power of the front module is improved. 1.5% or more, thereby relatively reducing the installation space of the same power station.

2. The utility model uses a composite material frame, such as a polyurethane frame. Because the polyurethane frame has good salt spray resistance and chemical resistance, the reliability of the component is improved, and at the same time, it avoids the use of aluminum frames that cause foreign countries to use metal products in my country. threat of anti-dumping; and reduced production costs, reduced component weight, and reduced requirements for system mounting brackets.

3. The utility model sets the junction box on the side of the frame, which is not only beneficial to the heat dissipation of the junction box, but also greatly reduces the shading of the light on the back of the module, avoids the occurrence of hot spots, and increases the actual use of the module life.

4. The utility model is simple in structure, easy to prepare, has good operability and practicability, and is suitable for popularization and application.

Description of drawings

Fig. 1 is a partial cross-sectional view of Embodiment 1 of the utility model;

Fig. 2 is a top view of Embodiment 1 of the utility model.

Among them: 1. Glass; 2. Upper film; 3. Battery sheet group; 4. Lower film; 5. Transparent backplane; 6. Frame; 7. Junction box.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment one

Referring to Figures 1 and 2, a double-sided solar cell module includes, from top to bottom, glass 1, an upper adhesive film 2, a cell assembly 3, a lower adhesive film 4, and a transparent back sheet 5, as well as a frame 6 and For the junction box 7, the upper layer of adhesive film is a high-transparency packaging adhesive film for ultraviolet light, and the lower layer of adhesive film is an ultraviolet light cut-off adhesive film; the junction box is arranged on the side of the frame.

The frame is a polyurethane frame.

One side of the frame is provided with a through hole, and the bus strip of the battery pack is electrically connected to the junction box through the through hole.

The upper layer of adhesive film is the F406 adhesive film produced by Hangzhou First Photovoltaic Materials Co., Ltd., and the lower layer of adhesive film is the F806 adhesive film produced by Hangzhou First Photovoltaic Materials Co., Ltd.; the transparent backboard is a transparent TPE structure Back plate; the battery slices in the battery slice group are double-sided power generation monocrystalline cells, and the battery slices are connected by pre-pressed Z-shaped bending ribbons to form a battery slice group.

Laminate the above-mentioned cell group with the upper glass, F406 film, F806 film, transparent TPE back plate, put the stacked modules into the laminator for lamination, and repair the laminated parts after cooling side, and install a polyurethane composite material frame; and install the junction box on the short frame of one side of the component to obtain the solar cell module.

The test proves that compared with the existing battery components, the front output power of the double-sided solar cell module of this embodiment is increased by more than 1.5%.

Claims (4)

1. double-sided solar battery assembly, comprise successively from top to bottom glass (1), upper strata glued membrane (2), cell piece group (3), lower floor's glued membrane (4) and transparent back panel (5), also comprise frame (6) and terminal box (7), it is characterized in that: described upper strata glued membrane is the high thoroughly packaging adhesive film of ultraviolet light, and described lower floor glued membrane is ultraviolet light cut-off glued membrane; Described terminal box is located at the side of frame.

2. double-sided solar battery assembly according to claim 1, it is characterized in that: described frame is the composite material frame.

3. double-sided solar battery assembly according to claim 2, it is characterized in that: described frame is the polyurethane frame.

4. double-sided solar battery assembly according to claim 1, it is characterized in that: a side of described frame is provided with through hole, and the convergent belt of cell piece group is electrically connected with terminal box by through hole.

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