Double-sided colored photovoltaic module capable of generating power

Abstract

The utility model discloses a double-sided colored photovoltaic module capable of generating power. The photovoltaic module comprises colored high-light-transmittance front plate glass, a first packaging layer, a double-sided battery layer, a second packaging layer and colored high-light-transmittance back plate glass which are stacked in sequence, the colored high-light-transmittance front plate glass and the colored high-light-transmittance back plate glass are obtained by forming a colored layer coating film on a glass substrate, the front plate glass and the back plate glass are the same or different in color and the same or different in light transmittance, and the light transmittance of the colored high-light-transmittance front plate glass and the light transmittance of the colored high-light-transmittance back plate glass are both not lower than 70%; a screen developing structure is arranged in the first packaging layer and / or the second packaging layer, and the screen developing structure corresponds to the gap position of the double-sided battery piece in the double-sided battery layer. The double-sided colored photovoltaic module capable of generating power can generate power from two sides, has high power generation efficiency, is rich in color, and can be applied to various building scenes to meet the requirement of building beauty.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic modules, and particularly relates to a double-sided color double-sided power-generating photovoltaic module. Background Art

[0002] With the increasingly strict requirements for carbon emission reduction and the growing demand for renewable electricity, building integrated photovoltaics (BIPV) is considered a huge market with a bright future and can make important contributions to the sustainable development of zero-energy buildings and cities. However, currently, traditional photovoltaic (PV) panels usually present a dark and monotonous appearance color, which is not very suitable for building decoration, greatly limiting the large-scale installation of BIPV. Therefore, making photovoltaic modules more beautiful is the goal pursued by people at present.

[0003] Currently, in order to meet the requirements of building aesthetics and color rendering, color photovoltaic modules generally use a black adhesive film or a black back glass on the back of the battery string of the photovoltaic module to improve the color of the front of the module (as Figure 1 shown). Such a photovoltaic module is a single-sided power-generating module, and its back cannot generate electricity, resulting in low power generation efficiency. Because the back of this color module is black, it can generally only be applied to occasions such as building facades and roofs where there are no requirements for the appearance of the back of the module, and cannot be applied to application occasions such as photovoltaic fences and photovoltaic sound barriers where there are requirements for the appearance of both sides of the module. Summary of the Utility Model

[0004] The purpose of the utility model is to address the problem that currently, color photovoltaic modules can only generate electricity and display color on one side, resulting in low power generation efficiency and limited application scenarios. The utility model designs a double-sided color double-sided power-generating photovoltaic module, which can generate electricity on both sides with high power generation efficiency. At the same time, the color of this photovoltaic module is rich and can be applied to various building scenarios to meet the aesthetic requirements of buildings.

[0005] To achieve the above purpose, the utility model is realized by the following technical solutions:

[0006] The utility model designs a double-sided color double-sided power-generating photovoltaic module, which includes: a color high-transmittance front plate glass, a first encapsulation layer, a double-sided battery layer, a second encapsulation layer, and a color high-transmittance back plate glass that are sequentially stacked;

[0007] Wherein: the color high-transmittance front plate glass and the color high-transmittance back plate glass are obtained by forming a color layer coating on a glass substrate, and the colors and transmittances of the color high-transmittance front plate glass and the color high-transmittance back plate glass can be the same or different, and the transmittances of the color high-transmittance front plate glass and the color high-transmittance back plate glass are not less than 70%;

[0008] Wherein: a screen printing color display structure is arranged inside the first encapsulation layer and / or the second encapsulation layer, for enriching the color of the photovoltaic module, and the screen printing color display structure is arranged corresponding to the gap position of the double-sided solar cells in the double-sided cell layer.

[0009] Further, a double-sided color double-sided power-generating photovoltaic module: the screen printing color display structure is a screen printing interlayer material with a color display effect, a non-flowing interlayer film, an interlayer plastic plate or glass.

[0010] Further, a double-sided color double-sided power-generating photovoltaic module: a high-reflection material is further arranged on the screen printing color display structure, for improving the light diffuse reflection at the gap of the double-sided solar cells, so as to increase the power generation efficiency of the photovoltaic module.

[0011] Further, a double-sided color double-sided power-generating photovoltaic module: screen printing color display structures are respectively arranged inside the first encapsulation layer and the second encapsulation layer.

[0012] Furthermore, a double-sided color double-sided power-generating photovoltaic module: the screen printing color display structures arranged in the first encapsulation layer and the second encapsulation layer can be set to have the same or different shapes and colors.

[0013] Further, a double-sided color double-sided power-generating photovoltaic module: the color layer coatings on the color high-transmittance front plate glass and the color high-transmittance back plate glass are obtained by full-plate color printing or screen printing, the thickness of the color layer coatings is set to be 10-20 μm, and the transmittances of the color high-transmittance front plate glass and the color high-transmittance back plate glass are respectively 80-90%.

[0014] The beneficial effects of the present utility model:

[0015] (1) The structure of the photovoltaic module designed by the present utility model from top to bottom is: color high-transmittance front plate glass, first encapsulation layer, double-sided cell layer, second encapsulation layer and color high-transmittance back plate glass. Among them, the transmittances of the color high-transmittance front plate glass and the color high-transmittance back plate glass are relatively high. The structure of the photovoltaic module designed by the present utility model mainly shows colors through the color high-transmittance front plate glass and the color high-transmittance back plate glass, and performs color display and encapsulation through the color display structures in the first encapsulation layer and / or the second encapsulation layer. At least one of the first encapsulation layer and the second encapsulation layer is provided with a screen printing color display structure, which corresponds to the non-power generation area (i.e., the gap between solar cells) of the double-sided cell layer, realizing double-sided power generation of the double-glass module while taking into account the double-sided color display function.

[0016] (2) The light transmittance and color of the colored high light transmittance front panel glass and the colored high light transmittance back panel glass can be the same or different. The color display structure corresponding to the colored high light transmittance front panel glass and the colored high light transmittance back panel glass can be the same or different. It can achieve the same or different front and back color patterns of the double-sided double-glass module, and can be matched according to different building application requirements, with a wide range of selectivity. The photovoltaic module of the present invention uses the combination of the colored high light transmittance front panel glass, the colored high light transmittance back panel glass and the color display structure, so that the appearance of the photovoltaic module presents rich colors and can be applied to various building scenes to meet the aesthetic requirements of buildings. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings without creative efforts based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of an existing colored photovoltaic module;

[0019] Figure 2 It is a schematic structural diagram of a double-sided colored double-sided power generation photovoltaic module designed in Embodiment 1;

[0020] Figure 3 It is a schematic structural diagram of a double-sided colored double-sided power generation photovoltaic module designed in Embodiment 2;

[0021] Figure 4 It is a schematic structural diagram of a double-sided colored double-sided power generation photovoltaic module designed in Embodiment 3;

[0022] Figure 5 It is a schematic structural diagram of a double-sided colored double-sided power generation photovoltaic module designed in Embodiment 4.

[0023] Reference numerals in the figures: 1 - colored high light transmittance front panel glass, 2 - first encapsulation layer, 3 - double-sided battery layer, 4 - second encapsulation layer, 5 - colored high light transmittance back panel glass, 6 - screen color display structure, 7 - battery cell gap, 31 - double-sided battery cell. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0026] Embodiment 1

[0027] As Figure 2 shown, in this Embodiment 1, a double-sided color double-sided power-generating photovoltaic module is designed, which includes: a color high-transmittance front plate glass 1, a first encapsulation layer 2, a double-sided battery layer 3, a second encapsulation layer 4, and a color high-transmittance back plate glass 5 that are stacked in sequence;

[0028] Among them: the color high-transmittance front plate glass 1 and the color high-transmittance back plate glass 5 are obtained by full-plate color printing or screen printing a 15-μm-thick color layer coating on two identical glass substrates, and the color high-transmittance front plate glass 1 and the color high-transmittance back plate glass 5 have the same color and the same transmittance, and the transmittance of both is 80%;

[0029] Among them: a screen printing color display structure 6 (a high-reflection material is also provided on the color display structure) is arranged inside the second encapsulation layer 4 to be used for enriching the color of the photovoltaic module, and the screen printing color display structure 6 is arranged corresponding to the gap position of the double-sided battery cells 31 in the double-sided battery layer 3.

[0030] In this Embodiment 1, the double-sided color and double-sided power-generating photovoltaic module adopts a double-glass structure and can generate electricity on both sides. The front plate glass 1 and the back plate glass 5 have the same color. The thickness of the color layer coating on both of them is 15 μm, and the light transmittance is 80%. The screen display structure 6 in the second encapsulation layer 4 plays a role in color display. At the same time, since the screen display structure 6 only corresponds to the non-power generation area (the gap between the double-sided solar cells 31) of the photovoltaic module, it does not block the solar cells. Moreover, the display structure 6 is provided with a high-reflection material, which can improve the light diffuse reflection at the gap of the double-sided solar cell layer 3, further increasing the power generation efficiency of the photovoltaic module.

[0031] Embodiment 2

[0032] As Figure 3 shown, in this Embodiment 2, a double-sided color and double-sided power-generating photovoltaic module is designed, which includes: a color high-light transmittance front plate glass 1, a first encapsulation layer 2, a double-sided solar cell layer 3, a second encapsulation layer 4, and a color high-light transmittance back plate glass 5 that are stacked in sequence;

[0033] Among them: the color high-light transmittance front plate glass 1 and the color high-light transmittance back plate glass 5 are obtained by whole-plate color printing or screen printing a 12-μm-thick color layer coating on two identical glass substrates. And the color high-light transmittance front plate glass 1 and the color high-light transmittance back plate glass 5 have different colors and the same light transmittance, and the light transmittance of both is 85%;

[0034] Among them: a screen display structure 6 (a high-reflection material is also provided on the display structure) is arranged inside the first encapsulation layer 2 to be used for enriching the color of the photovoltaic module, and the screen display structure 6 is arranged corresponding to the position of the gap 7 between the double-sided solar cells 31 in the double-sided solar cell layer 3.

[0035] In this Embodiment 2, the double-sided color and double-sided power-generating photovoltaic module adopts a double-glass structure and can generate electricity on both sides. The front plate glass 1 and the back plate glass 5 have different colors, the thickness of the color layer coating is 12 μm, and the light transmittance of both is 85%. The screen display structure 6 arranged in the first encapsulation layer 2 plays a role in color display. At the same time, since the screen display structure only corresponds to the non-power generation area 8 of the photovoltaic module, it does not block the solar cells. Moreover, because a high-reflection material is provided on the display structure 6, it can improve the light diffuse reflection at the gap of the double-sided solar cell layer 3, further increasing the power generation efficiency of the photovoltaic module.

[0036] Embodiment 3

[0037] As Figure 4 shown, in this Embodiment 3, a double-sided color and double-sided power-generating photovoltaic module is designed, which includes: a color high-light transmittance front plate glass 1, a first encapsulation layer 2, a double-sided solar cell layer 3, a second encapsulation layer 4, and a color high-light transmittance back plate glass 5 that are stacked in sequence;

[0038] Among them: the colored high light transmittance front plate glass 1 and the colored high light transmittance back plate glass 5 are obtained by full-plate color printing or screen printing color layer coating on two identical glass substrates, and the colored high light transmittance front plate glass 1 and the colored high light transmittance back plate glass 5 have the same color but different light transmittances, and their light transmittances are 85% and 90% respectively;

[0039] Among them: screen printing color display structures 6 are respectively arranged inside the first encapsulation layer 2 and the second encapsulation layer 4, and the display structure colors in the two layers are set to be the same to enrich the color of the photovoltaic module, and the screen printing color display structures 6 are all arranged corresponding to the positions of the gaps 7 of the bifacial solar cells 31 in the bifacial battery layer 3.

[0040] Example 4

[0041] As Figure 5 shown, this Example 4 designs a bifacial color bifacial power generation photovoltaic module, which includes: a colored high light transmittance front plate glass 1, a first encapsulation layer 2, a bifacial battery layer 3, a second encapsulation layer 4, and a colored high light transmittance back plate glass 5 that are stacked in sequence;

[0042] Among them: the colored high light transmittance front plate glass 1 and the colored high light transmittance back plate glass 5 are obtained by full-plate color printing or screen printing color layer coating on two identical glass substrates, and the colored high light transmittance front plate glass 1 and the colored high light transmittance back plate glass 5 have different colors and different light transmittances, and their light transmittances are 80% and 85% respectively;

[0043] Among them: screen printing color display structures 6 are respectively arranged inside the first encapsulation layer 2 and the second encapsulation layer 4, and the display structure colors in the two layers are set to be different to enrich the color of the photovoltaic module, and the screen printing color display structures 6 are all arranged corresponding to the positions of the gaps 7 of the bifacial solar cells 31 in the bifacial battery layer 3.

[0044] Comparative Example 1

[0045] Using the existing colored photovoltaic module as shown in Figure 1 as a comparison, the difference between it and the photovoltaic module designed in Example 3 is: for this photovoltaic module in Comparative Example 1, its back uses a black back glass to improve the color of the front of the module, and this photovoltaic module in Comparative Example 1 is a single-sided power generation module, and its back cannot generate electricity.

[0046] Test:

[0047] The photovoltaic module of Example 3, the photovoltaic module of Comparative Example 1, a micro-inverter of the same model, and an electricity meter were connected. Comparative tests were carried out with installations facing south at the optimal inclination angle of 23° and facing south at 90°. A micro-grid connection system was built, and the electricity meter was used to record the power generation of the two types of photovoltaic modules in Example 3 and Comparative Example 1. The test results are as follows:

[0048]

[0049] Note: The daily power generation per kilowatt = power generation / installed capacity / number of days. This data is an important indicator for evaluating the power generation efficiency of the module.

[0050] From the above test results, it can be seen that when installed facing south at the optimal inclination angle of 23°, the double-sided color double-sided power-generating photovoltaic module (Example 3) of the present invention has a power generation gain of about 10% compared with the conventional color module (Comparative Example 1); when installed facing south at 90°, the double-sided color double-sided power-generating double-glass module has a power generation gain of about 62.2% compared with the conventional color module. This shows that the double-sided color double-sided power-generating photovoltaic module designed by the present invention can effectively improve the power generation efficiency of the photovoltaic module whether in conventional installation or facade installation.

[0051] The double-sided color double-sided power-generating photovoltaic module designed by the present invention can be combined according to the requirements of different application scenarios. The colors of the front plate glass 1 and the back plate glass 5 can be the same or different. The encapsulation layer of the multi-layer structure can be one or two. The middle screen structure, shape, and color can be the same or different. The double photovoltaic module of the present invention can generate electricity on both sides, has high power generation efficiency, and is rich in colors. It can be applied to various building scenarios to meet the aesthetic requirements of buildings.

[0052] The above are the preferred embodiments of the present invention, which are only used to explain the present invention and are not used to limit the present invention. Any obvious changes or variations derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A double-sided color double-sided power-generable photovoltaic module, characterized in that The described photovoltaic module comprises: a colored high light transmittance front plate glass (1), a first encapsulation layer (2), a bifacial cell layer (3), a second encapsulation layer (4), and a colored high light transmittance back plate glass (5) which are stacked in sequence; Wherein: the colored high light transmittance front plate glass (1) and the colored high light transmittance back plate glass (5) are obtained by forming a colored layer coating on a glass substrate, and the colored high light transmittance front plate glass (1) and the colored high light transmittance back plate glass (5) may have the same or different colors, the same or different light transmittances, and the light transmittances of both are not less than 70%; Wherein: a screen printing color display structure (6) is arranged inside the first encapsulation layer (2) and / or the second encapsulation layer (4) for enriching the color of the photovoltaic module, and the screen printing color display structure (6) is arranged corresponding to the gap position of the bifacial cells (31) in the bifacial cell layer (3).

2. The dual-sided color and dual-sided power-generable photovoltaic module according to claim 1, wherein, The screen printing color display structure (6) is a screen sandwich material with a color display effect, a non-flowable interlayer film, an interlayer plastic plate or glass.

3. A double-sided color double-sided power-generable photovoltaic module according to claim 1 or 2, characterized in that, A high reflection material is further arranged on the screen printing color display structure (6) for improving the light diffuse reflection at the gap of the bifacial cells (31) so as to increase the power generation efficiency of the photovoltaic module.

4. A double-sided color double-sided power-generable photovoltaic module according to claim 1, characterized in that, The screen printing color display structures (6) are respectively arranged inside the first encapsulation layer (2) and the second encapsulation layer (4).

5. A double-sided color double-sided power-generable photovoltaic module according to claim 4, characterized in that, The shapes and colors of the screen printing color display structures (6) arranged in the first encapsulation layer (2) and the second encapsulation layer (4) can be set to be the same or different.

6. A double-sided color double-sided power-generable photovoltaic module according to claim 1, wherein The colored layer coatings on the colored high light transmittance front plate glass (1) and the colored high light transmittance back plate glass (5) are obtained by full plate color printing or screen printing, the thickness of the colored layer coatings is set to be 10 - 20 μm, and the light transmittances of the colored high light transmittance front plate glass (1) and the colored high light transmittance back plate glass (5) are 80 - 90% respectively.

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