Three-glass laminated photovoltaic module

Abstract

The utility model discloses a three-glass laminated photovoltaic module, which is of a laminated type and comprises a first layer of glass, a thin film battery, a first packaging adhesive film, a second layer of glass, a second packaging adhesive film, a crystal silicon battery and a third layer of glass. When sunlight enters the photovoltaic module, firstly, the thin-film battery absorbs photons matched with the forbidden bandwidth of the thin-film battery, the photons which cannot be absorbed by the thin-film battery can penetrate through the thin-film battery and the second-layer glass to reach the conventional crystalline silicon battery and are absorbed by the crystalline silicon battery to generate power, the light utilization rate is high, and the power generation efficiency is improved; the three layers of glass are connected and packaged into a whole through the first packaging adhesive film and the second packaging adhesive film, assembling and forming are facilitated, and the structural strength is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic devices, in particular to a three-glass laminated photovoltaic assembly. Background Art

[0002] Thin-film batteries and crystalline silicon batteries are currently common types of batteries. Thin-film batteries are wide-bandgap batteries that respond well to short-wavelength light, but cannot utilize long-wavelength light, and are selectively transparent to the spectrum. Crystalline silicon batteries still respond to long-wavelength light, but respond weakly to ultraviolet and shorter wavelength light. A single type of battery has insufficient utilization of light and low power generation efficiency, which needs to be improved. Utility Model Content

[0003] In order to solve at least one of the above technical defects, the utility model provides the following technical solutions:

[0004] The present application document discloses a three-glass laminated photovoltaic module, which is a laminated type and includes a first layer of glass, a thin-film battery, a first packaging film, a second layer of glass, a second packaging film, a crystalline silicon battery, and a third layer of glass. The first layer of glass, the thin-film battery, the second layer of glass, the crystalline silicon battery, and the third layer of glass are arranged in sequence from top to bottom. The thin-film battery is located in a chamber surrounded by the first packaging film and the first layer of glass or the second layer of glass, and the thin-film battery is correspondingly bonded to the first layer of glass or the second layer of glass, and the first layer of glass and the second layer of glass are connected by the first packaging film; the crystalline silicon battery is located in the cavity of the second packaging film, and the second layer of glass and the third layer of glass are connected by the second packaging film.

[0005] In this scheme, the structure of the photovoltaic module is designed to mix thin-film cells and crystalline silicon cells in a stacked configuration. When sunlight enters the photovoltaic module, the thin-film cell will first absorb photons that match its bandgap width. The photons that cannot be absorbed will pass through the thin-film cell and the second layer of glass to reach the conventional crystalline silicon cell, and be absorbed by the crystalline silicon cell to generate electricity. The light utilization rate is high and the power generation efficiency is improved.

[0006] In this solution, the three layers of glass are connected and packaged into one body by the first packaging film and the second packaging film, which facilitates assembly and molding and improves structural strength.

[0007] Furthermore, the thin film battery is of perovskite or cadmium telluride type.

[0008] Furthermore, a transparent conductive oxide layer is provided on the upper surface of the plate body in the second layer of glass, such as common TCO conductive glass.

[0009] Alternatively, a transparent conductive oxide layer is provided on the lower surface of the plate body in the first layer of glass to facilitate deposition and molding of the thin-film battery and improve assembly efficiency.

[0010] Furthermore, the thin film battery is deposited and formed on the conductive oxide layer, thereby improving assembly efficiency.

[0011] Furthermore, the first layer of glass and the second layer of glass are TCO conductive glass.

[0012] Furthermore, the crystalline silicon cells are multiple and spaced apart, and adjacent crystalline silicon cells are separated by a second packaging film.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model designs the structure of the photovoltaic module, and the thin-film battery and the crystalline silicon battery are packaged into one according to a specific configuration, thereby improving the power generation efficiency, and the assembly efficiency and structural strength are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a schematic diagram of the structure of the three-glass laminated photovoltaic module in Example 1;

[0017] Figure 2 is a schematic diagram of the structure of the three-glass laminated photovoltaic module in Example 2;

[0018] Wherein, the accompanying drawings are marked as follows:

[0019] 01. First layer of glass; 02. First packaging film; 03. Thin-film battery; 04. Second layer of glass; 05. Second packaging film; 06. Crystalline silicon battery; 07. Third layer of glass. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, the three-glass laminated photovoltaic module in this example includes a first layer of glass 01, a thin-film battery 03, a first packaging film 02, a second layer of glass 04, a second packaging film 05, a crystalline silicon battery 06, and a third layer of glass 07. The first layer of glass 01, the thin-film battery 03, the second layer of glass 04, the crystalline silicon battery 06, and the third layer of glass 07 are stacked in sequence from top to bottom.

[0023] The first layer of glass 01 is at the top, and is used as a cover plate, and can be formed of a common cover plate material for photovoltaic cells, such as an ultra-white embossed type or a TCO type; the third layer of glass 07 is at the bottom, and is used as a back plate, and can be formed of a common back plate material for photovoltaic cells, such as an ultra-white embossed type or a TCO type, and the second layer of glass 04 is in the middle. The second layer of glass 04 is connected to the first layer of glass 01 by a first packaging film 02, and is fixed as a whole by the first packaging film 02.

[0024] The thin film battery 03 is in a chamber surrounded by the first packaging film 02 and the second layer of glass 04. Figure 1 As shown, the thin film battery 03 is attached to the upper surface of the second layer of glass 04, such as directly depositing and forming on the upper surface, or preforming the thin film battery and then attaching. For the first packaging film, such as common EVA material, POE material, etc.

[0025] The thin film battery 03 is of the perovskite type or the cadmium telluride type. In this example, the second layer of glass 04 is of the TCO type, that is, the surface of the flat glass is evenly coated with a transparent conductive oxide film (i.e., a conductive oxide layer) by physical or chemical plating or other methods. If a conductive oxide layer is formed on the upper surface of the plate body in the second layer of glass 04, the thin film battery is directly deposited on the conductive oxide layer to improve assembly efficiency.

[0026] The second layer of glass 04 and the third layer of glass 07 are connected by a second packaging film 05, and are fixed together by the second packaging film. The second packaging film is made of common EVA material, POE material, etc. The sheet-shaped crystalline silicon battery 06 is located between the second layer of glass 04 and the third layer of glass 07 and in the cavity of the second packaging film 05. Multiple crystalline silicon batteries 06 are distributed in the cavity along horizontal and vertical rows, and adjacent crystalline silicon batteries are separated by the second packaging film filling area.

[0027] As for the assembly method, a film is placed on the upper surface of the third layer of glass and a crystalline silicon cell is placed on the film, another film is placed on the crystalline silicon cell, a second layer of glass with a thin film cell deposited thereon is placed on the second packaging film, a first packaging film is placed on the thin film cell, and a first layer of glass is placed on the first packaging film, and the whole is a stacked configuration. After that, high-pressure lamination is performed, the first packaging film fills the periphery of the thin film cell to form a sealed chamber with the second layer of glass below, and the first layer of glass is bonded and fixed to the second layer of glass, the films above and below the crystalline silicon cell are melted to fill the periphery of the crystalline silicon cell and the adjacent gaps, and are connected to form a second packaging film, the crystalline silicon cell is in the cavity of the second packaging film, and the second layer of glass and the third layer of glass are bonded and fixed to the second packaging film.

[0028] Example 2

[0029] like Figure 2As shown, the difference between the photovoltaic module in this example and Example 1 is that the first layer of glass 01 is of TCO type, a conductive oxide layer is formed on the lower surface of the plate body of the first layer of glass 01, and the thin film battery 03 is deposited on the conductive oxide layer to be formed, and the thin film battery 03 is in a cavity surrounded by the first packaging film 02 and the bottom surface of the first layer of glass 01.

[0030] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A three-glass laminated photovoltaic module, wherein the photovoltaic module is a laminated type, characterized in that: The invention comprises a first layer of glass (01), a light-transmitting thin-film battery (03), a first packaging film (02), a second layer of glass (04), a second packaging film (05), a crystalline silicon battery (06), and a third layer of glass (07). The first layer of glass (01), the thin-film battery (03), the second layer of glass (04), the crystalline silicon battery (06), and the third layer of glass (07) are arranged in sequence from top to bottom. The thin-film battery (03) is located in a cavity surrounded by the first packaging film (02) and the first layer of glass (01) or the second layer of glass (04), and the thin-film battery (03) is correspondingly attached to the first layer of glass (01) or the second layer of glass (04). The first layer of glass (01) and the second layer of glass (04) are connected by the first packaging film (02); the crystalline silicon battery (06) is located in the cavity of the second packaging film (05), and the second layer of glass (04) and the third layer of glass (07) are connected by the second packaging film (05).

2. The triple-glass laminated photovoltaic module according to claim 1, characterized in that: The thin film battery (03) is of perovskite or cadmium telluride type.

3. The triple-glass laminated photovoltaic module according to claim 1, characterized in that: A transparent conductive oxide layer is provided on the upper surface of the plate body in the second layer of glass (04); Alternatively, a transparent conductive oxide layer is provided on the lower surface of the plate body in the first layer of glass (01).

4. The triple-glass laminated photovoltaic module according to claim 3, characterized in that: The thin film battery (03) is deposited and formed on the conductive oxide layer.

5. The triple-glass laminated photovoltaic module according to claim 3, characterized in that: The first layer of glass (01) and the second layer of glass (04) are TCO conductive glass.

6. The triple-glass laminated photovoltaic module according to claim 1, characterized in that: The crystalline silicon cells (06) are multiple and spaced apart, and adjacent crystalline silicon cells (06) are separated by a second packaging film (05).

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