High-reflection double-glass assembly

Abstract

The utility model relates to a high reflection double glass subassembly, including battery, glass backplane and encapsulation layer, said battery is composed of a plurality of battery piece in matrix distribution, the gap of every two adjacent battery piece is provided with prism reflector, the top and bottom of said battery is covered with encapsulation layer, and the encapsulation layer is covered with the glass backplane. And one side, far away from the battery, of the packaging layer is connected with a glass back plate. The utility model relates to the technical field of photovoltaic panels. According to the high-reflection double-glass assembly, by arranging the prism reflecting plate, light entering a battery gap can be reflected back, and then the reflected light is subjected to interface reflection when passing through the glass back plate to irradiate the battery, so that the illumination intensity of the battery is effectively enhanced, and the utilization efficiency of light energy is higher; and the power generation efficiency of the double-glass assembly can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic panels, in particular to a high-reflection double-glass module. Background Art

[0002] Solar photovoltaic glass is a special glass that can generate electricity by laminating solar cells into it, utilize solar radiation, and has relevant current lead-out devices and cables. It is composed of low-iron glass, solar cell wafers, film, back glass, and special metal wires. The solar cell wafers are sealed between a piece of low-iron glass and a piece of back glass through the film, and it is a novel high-tech glass product for buildings.

[0003] In the prior art, due to the high light transmittance of the glass backplane of the double-glass module, when light passes through the gaps between the cell wafers, it will directly penetrate the double-glass module, preventing the light from being reflected back to the cell wafers, resulting in a relatively large loss of the light energy irradiated by the sun and affecting the power generation efficiency of the double-glass module. Summary of the Utility Model

[0004] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide a high-reflection double-glass module to solve the technical problems mentioned in the above background art.

[0005] The above technical purpose of the present utility model is achieved through the following technical solutions:

[0006] A high-reflection double-glass module includes a battery, a glass backplane, and a packaging layer. The battery is composed of a plurality of cell wafers distributed in a matrix. Prismatic reflector plates are arranged at the gaps between adjacent cell wafers. The top and bottom of the battery are covered with the packaging layer, and glass backplanes are connected to the sides of the packaging layer away from the battery.

[0007] Further, a PET reflective film is arranged between the two packaging layers, and the PET reflective film is sleeved outside the battery.

[0008] Further, the top and bottom of the PET reflective film are flush with the top and bottom of the battery respectively.

[0009] Further, isolation layers are arranged at the top and bottom of the prismatic reflector plate, and the material of the isolation layer is silicon dioxide.

[0010] Further, the outer sidewall of the isolation layer at the top of the prismatic reflector plate is flush with the top of the battery, and the outer sidewall of the isolation layer at the bottom of the prismatic reflector plate is flush with the bottom of the battery.

[0011] Further, the thickness of the isolation layer at the top of the prism reflector is A1, and the thickness of the isolation layer at the bottom of the prism reflector is A2, and A1 is greater than A2.

[0012] Further, the prism angle of the prism reflector is 90°, and the prism pitch of the prism reflector is 30 μm.

[0013] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0014] 1. For this high-reflection double-glass module, by providing the prism reflector, the light entering the battery gap can be reflected back, and then the reflected light generates an interface reflection when passing through the glass backplane and shines on the battery, thereby effectively enhancing the light intensity of the battery, making the utilization efficiency of light energy higher, and significantly improving the power generation efficiency of the double-glass module;

[0015] 2. For this high-reflection double-glass module, by providing the isolation layer, it can protect the prism reflector to avoid the generation of photo-generated holes during reflection of the prism reflector, resulting in a leakage current channel between the glass backplane and the encapsulation layer, thereby preventing the power generation efficiency of the double-glass module from being affected and making the double-glass module more practical;

[0016] 3. For this high-reflection double-glass module, by providing the PET reflective film, and the PET reflective film is a double-layer film composed of PET and EVA, it can effectively improve the reflectivity of light, enabling the light entering the edge of the double-glass module to contact the battery and generate electricity under the reflection of the PET reflective film, further enhancing the reflection ability of the double-glass module, greatly improving the utilization efficiency of light energy, and increasing the power generation efficiency of the double-glass module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of a high-reflection double-glass module of the present utility model.

[0019] Figure 2 It is an exploded view of a high-reflection double-glass module of the present utility model.

[0020] Figure 3 It is a schematic internal structure diagram of a high-reflection double-glass module of the present utility model.

[0021] Figure 4This is a schematic structural diagram of a prism reflector and an isolation layer in a high-reflection double-glass module of the present utility model.

[0022] Figure 5 This is a partial structural schematic diagram of a battery in a high-reflection double-glass module of the present utility model.

[0023] In the figure, 1 is a battery; 2 is a glass backplane; 3 is a packaging layer; 4 is a prism reflector; 5 is a PET reflective film; 6 is an isolation layer. Specific embodiments

[0024] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0025] Embodiment:

[0026] Referring to Figure 1 - Figure 5 A high-reflection double-glass module disclosed by the present utility model includes a battery 1, a glass backplane 2, and a packaging layer 3. The battery 1 is composed of a plurality of battery cells distributed in a matrix. A prism reflector 4 is provided at the gap between two adjacent battery cells. The top and bottom of the battery 1 are covered with a packaging layer 3, and the side of the packaging layer 3 away from the battery 1 is connected to a glass backplane 2.

[0027] In this embodiment, since light is diffusely reflected by the ground, some light will be reflected to the back of the photovoltaic panel. Therefore, in order to utilize this part of the light, improve the utilization efficiency of light energy, and at the same time improve the power generation efficiency of the photovoltaic panel, the back of the photovoltaic panel is provided with a highly transparent glass backplane 2, so that the light reflected by the ground can pass through the glass backplane 2 and be utilized, effectively improving the power generation efficiency of the photovoltaic panel.

[0028] However, it can be observed that Figure 2 There are gaps between a plurality of battery cells arranged in a matrix. The backplane of the photovoltaic panel also uses a transparent material to allow the diffusely reflected light to pass through for power generation, which will cause the light entering the gaps between the battery cells to directly pass through the battery 1, making the improvement in power generation efficiency brought by diffuse reflection not very significant. Therefore, it can be observed that Figure 3 and Figure 5 A prism reflector 4 is provided between two adjacent battery cells. The prism reflector 4 reflects the sunlight entering the gap, and then the reflected sunlight contacts the battery 1 for power generation, thus solving the negative impact brought by the high-transparency glass used for the backplane of the double-glass module, effectively improving the utilization efficiency of light energy, and making the double-glass module more practical.

[0029] In a further preferred embodiment of the present utility model, as Figure 3 shown, a PET reflective film 5 is provided between the two packaging layers 3, and the PET reflective film 5 is sleeved outside the battery 1.

[0030] In this embodiment, since the front and back of the double-glass module are both glass backplates 2, the light entering the edge of the battery 1 will directly pass through the double-glass module and cannot be utilized. Therefore, observing Figure 3 it can be found that a PET reflective film 5 is sleeved outside the battery 1. The PET reflective film 5 is a double-layer film composed of PET and EVA, which can effectively improve the light reflectivity, so that the light entering the edge of the double-glass module contacts the battery 1 under the reflection of the PET reflective film 5 to generate electricity, which can further enhance the reflection ability of the double-glass module, greatly improve the utilization efficiency of light energy, and improve the power generation efficiency of the double-glass module.

[0031] In a further preferred embodiment of the present invention, as Figure 3 shown, the top and bottom of the PET reflective film 5 are flush with the top and bottom of the battery 1 respectively.

[0032] In this embodiment, since glass backplates 2 for protecting the battery 1 need to be provided on both the front and back sides of the battery 1, and the battery 1 itself does not have adhesiveness, so that the battery 1 cannot be adhered to the glass backplate 2, a bonding encapsulation layer 3 is coated on the outer side wall of the battery 1, so that the glass backplate 2 can be stably connected to the battery 1.

[0033] And because a PET reflective film 5 is sleeved outside the battery 1, it will cause the outer side of the battery 1 to be affected by the PET reflective film 5 when coating the encapsulation layer 3 and cannot be coated smoothly, resulting in the edge not being well sealed when the glass backplate 2 is adhered to the battery 1, affecting the quality and service life of the double-glass module. Therefore, observing Figure 3 it can be found that the thickness of the PET reflective film 5 is the same as the thickness of the battery cell of the battery 1, so that the top and bottom of the PET reflective film 5 are both flush with the top and bottom of the battery cell, which can make the coating of the encapsulation layer 3 more smooth, make the connection between the glass backplate 2 and the battery 1 more tight and stable, and effectively improve the quality of the double-glass module.

[0034] In a further preferred embodiment of the present invention, as Figure 2 and Figure 5 shown, isolation layers 6 are provided on both the top and bottom of the prism reflector 4, and the material of the isolation layer 6 is silicon dioxide.

[0035] In this embodiment, since the prism reflector 4 needs to have good light reflection performance, a type of N-type semiconductor with a raw material of TiO2 is usually used. When this semiconductor is irradiated with ultraviolet light, the electrons in the valence band will obtain photon energy and jump to the conduction band to form photo-generated electrons, and photo-generated holes will be correspondingly generated in the valence band, resulting in a leakage current channel between the glass and the encapsulation material under the long-term action of high voltage in the battery module.

[0036] Therefore, isolation layers 6 are provided on both the top and bottom of the prism reflector 4 for reflecting light, and silica is used as the material of the isolation layer 6 because silica has good stability and insulation properties, which can play a good protective role for the battery.

[0037] Moreover, the main material of the glass backplane 2 is also silica. Making the isolation layer 6 and the glass backplane 2 have the same material can enable the isolation layer 6 to have a refractive index similar to that of the glass backplane 2, which can effectively reduce the interface reflection of light, thereby improving the utilization rate of light and the power generation efficiency of the double-glass module.

[0038] In a further preferred embodiment of the present invention, as Figure 5 shown, the outer sidewall of the isolation layer 6 located at the top of the prism reflector 4 is flush with the top of the battery 1, and the outer sidewall of the isolation layer 6 located at the bottom of the prism reflector 4 is flush with the bottom of the battery 1.

[0039] In this embodiment, since isolation layers 6 for providing protection are provided on both the top and bottom of the prism reflector 4, and the prism reflector 4 is arranged in the gap between two adjacent battery cells, the isolation layer 6 is also arranged in the gap between two adjacent battery cells. Also, because the glass backplane 2 needs to provide better protection for the battery 1, it is necessary to make the connection between the battery 1 and the glass backplane 2 more firm. Therefore, it is necessary to coat the encapsulation layer 3 used for connection evenly and smoothly. So, observing Figure 5 it can be found that the outer sidewall of the isolation layer 6 located at the top of the prism reflector 4 is flush with the top of the battery 1, and the outer sidewall of the isolation layer 6 located at the bottom of the prism reflector 4 is flush with the bottom of the battery 1, which can make the coating of the encapsulation layer 3 more even and smooth, thereby enhancing the connection strength between the battery 1 and the glass backplane 2.

[0040] In a further preferred embodiment of the present invention, as Figure 5 shown, the thickness of the isolation layer 6 located at the top of the prism reflector 4 is A1, and the thickness of the isolation layer 6 located at the bottom of the prism reflector 4 is A2, and A1 is greater than A2.

[0041] In this embodiment, because in the use of the double-glass module, the direct light intensity received on the front is definitely stronger than the diffuse reflection light intensity received on the back, the light intensity received on the front of the prism reflector 4 is much greater than that received on the back, resulting in much more photo-generated holes generated on the front of the prism reflector 4 than on the back.

[0042] Therefore, observing Figure 5It can be found that the thickness of the isolation layer 6 at the top of the prism reflector 4 is greater than that of the isolation layer 6 at the bottom of the prism reflector 4, making the protection effect on the front side of the prism reflector 4 more prominent. When the front side of the prism reflector 4 is in contact with high-intensity ultraviolet light, it can still operate stably.

[0043] In a further preferred embodiment of the present invention, as Figure 5 shown, the prism angle of the prism reflector 4 is 90°, and the prism pitch of the prism reflector 4 is 30 μm.

[0044] In this embodiment, since light is reflected by the reflector when passing through the gaps between the battery cells, in order to make the reflected light contact the battery 1 well for power generation, the reflector needs to have an angle for reflection, so that the refracted light can be reflected to the battery 1 through the interface when passing through the surface of the glass backplane 2, which can effectively improve the utilization efficiency of light, thereby making the power generation efficiency of the double-glass module higher and effectively improving the practicability of the double-glass module.

[0045] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A highly reflective double-glass module, comprising a battery (1), a glass back panel (2) and an encapsulation layer (3), characterized in that: The battery (1) is composed of a plurality of battery cells distributed in a matrix, a prismatic reflector (4) is provided at the gap between two adjacent battery cells, the top and bottom of the battery (1) are covered with a packaging layer (3), and the side of the packaging layer (3) away from the battery (1) is connected to a glass back plate (2).

2. A high-reflection double-glass component according to claim 1, characterized in that: A PET reflective film (5) is provided between the two packaging layers (3), and the PET reflective film (5) is sleeved on the outside of the battery (1).

3. A high-reflection double-glass component according to claim 2, characterized in that: The top and bottom of the PET reflective film (5) are flush with the top and bottom of the battery (1) respectively.

4. A high-reflection double-glass component according to claim 3, characterized in that: The top and bottom of the prism reflector (4) are both provided with an isolation layer (6), and the isolation layer (6) is made of silicon dioxide.

5. A high-reflection double-glass component according to claim 4, characterized in that: The outer side wall of the isolation layer (6) located at the top of the prismatic reflector (4) is flush with the top of the battery (1), and the outer side wall of the isolation layer (6) located at the bottom of the prismatic reflector (4) is flush with the bottom of the battery (1).

6. A high-reflection double-glass component according to claim 5, characterized in that: The thickness of the isolation layer (6) located at the top of the prism reflector (4) is A1, and the thickness of the isolation layer (6) located at the bottom of the prism reflector (4) is A2, and A1 is greater than A2.

7. A high-reflection double-glass component according to claim 6, characterized in that: The prism angle of the prism reflector (4) is 90°, and the prism spacing of the prism reflector (4) is 30 μm.

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