Flexible perovskite battery assembly and photovoltaic panel thereof

Abstract

The utility model relates to the technical field of photovoltaic panels, and discloses a flexible perovskite battery assembly and a photovoltaic panel thereof. The photovoltaic panel for the flexible perovskite battery assembly comprises a flexible base material layer, the outer surface of the flexible substrate layer is sequentially provided with a flexible ultraviolet light cut-off layer and a flexible water-blocking oxygen-blocking layer in contact with external air; the inner surface of the flexible substrate layer is sequentially provided with an adhesive film prepolymer layer and a conductive network cable layer in contact with the perovskite solar cell. According to the photovoltaic panel, the defects of an existing fluoride-free photovoltaic backboard in the aspects of flexibility, water resistance, oxygen resistance and ultraviolet light cut-off can be overcome, the long-term outdoor use stability of a flexible perovskite battery assembly is improved, the service life of the flexible perovskite battery assembly is prolonged, and introduction of redundant electric leads and addition of a packaging adhesive film in the subsequent assembly preparation process can be avoided; the preparation time of the assembly is shortened, the preparation efficiency of the assembly is improved, the problems of the flexible perovskite battery assembly in the aspects of stability and packaging are effectively solved, and popularization and application of the flexible perovskite battery assembly are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic plates, and particularly relates to a flexible perovskite battery module and a photovoltaic panel thereof. Background Art

[0002] With the continuous progress of photovoltaic technology, the photoelectric conversion efficiency of traditional crystalline silicon cells has approached its theoretical limit. In order to seek higher photoelectric conversion efficiency, perovskite solar cells (referred to as perovskite cells for short) have attracted much attention as a new type of high-efficiency energy conversion device. Especially for the crystalline silicon-perovskite tandem cell technology, the world record of its highest photoelectric conversion efficiency has reached 33.2%, showing great application potential. However, the commercial application of perovskite solar cell modules (referred to as perovskite cell modules for short) still faces many challenges such as stability and encapsulation.

[0003] For example, current transparent photovoltaic backsheets and photovoltaic front plates on the market, as shown in the publication number CN218665878U, although the weather resistance, water resistance and hardness of its fluorine-free photovoltaic backsheet are significantly improved, and it is more environmentally friendly than the fluorine-containing photovoltaic backsheet, and the stability and reliability are improved. However, the existing such fluorine-free photovoltaic backsheet still has deficiencies in flexibility, water and oxygen barrier, and ultraviolet light cut-off, and cannot meet the high-quality requirements for long-term outdoor use of flexible perovskite cell modules. These problems seriously affect the stability and service life of flexible perovskite cell modules for long-term outdoor use, and restrict their commercial promotion.

[0004] Moreover, the existing encapsulation structure of perovskite cell modules, as shown in CN205282510U, in order to avoid the adverse effects of water vapor and other factors on perovskite cells and improve the reliability and stability of perovskite cell modules, during the preparation process of the modules, it is usually necessary to fill encapsulation glue (such as solar cell encapsulation glue, module encapsulation glue) between the front glass and the back substrate, and several interconnection wires also need to be set to collect the current of several perovskite cells; all of these will make the preparation process of perovskite cell modules extremely cumbersome, prolong the preparation time of perovskite cell modules, reduce their preparation efficiency, and are not conducive to the promotion and application of perovskite cell modules. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a flexible perovskite battery module and a photovoltaic panel thereof.

[0006] Based on this, the utility model discloses a photovoltaic panel for a flexible perovskite battery module, which includes a flexible substrate layer; a flexible ultraviolet light cut-off layer and a flexible water and oxygen barrier layer in contact with the external air are sequentially arranged on the outer surface of the flexible substrate layer;

[0007] An inner surface of the flexible substrate layer is sequentially provided with a prepolymer layer of a glue film and a conductive wire network layer in contact with a perovskite solar cell.

[0008] Preferably, the flexible ultraviolet light cutoff layer is an acrylic resin coating or a silicone resin coating that cuts off ultraviolet light, and its thickness is 5-10 microns.

[0009] More preferably, the flexible ultraviolet light cutoff layer is an acrylic resin coating or a silicone coating that resists ultraviolet light and is transparent to infrared radiation.

[0010] Preferably, the flexible water and oxygen barrier layer is a room temperature self-curing silicone resin layer, and its thickness is 10-15 microns.

[0011] Preferably, the flexible substrate layer is a transparent PET layer, and its thickness is 260-350 microns.

[0012] Preferably, the prepolymer layer of the glue film is a combination formed by one or more of a POE glue film prepolymer layer, an EVA glue film prepolymer layer, an EPE glue film prepolymer layer, and a PVB glue film prepolymer layer; the thickness of the prepolymer layer of the glue film is 100-300 microns.

[0013] More preferably, the prepolymer layer of the glue film is a low-temperature cross-linking glue film prepolymer layer with a cross-linking temperature of 80-120 °C.

[0014] Preferably, the conductive wire network layer is an indium tin oxide wire network layer electroplated on the inner surface of the prepolymer layer of the glue film, its thickness is 5-10 nanometers, and the wire network of the indium tin oxide wire network layer is electrically connected to the grid lines of the perovskite solar cell.

[0015] Preferably, a flexible perovskite battery module uses a photovoltaic panel, which further includes an adhesive coating provided between the flexible substrate layer and the prepolymer layer of the glue film;

[0016] The adhesive coating is a polyester coating, and its thickness is 2-4 microns.

[0017] The present invention also discloses a flexible perovskite battery module, which includes a photovoltaic front plate, a perovskite solar cell, and a photovoltaic back plate stacked in sequence; the photovoltaic front plate and / or the photovoltaic back plate is a flexible perovskite battery module photovoltaic panel described above in the content of the present invention.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The photovoltaic panel for a flexible perovskite battery module of the present utility model, based on a flexible substrate layer, in cooperation with a flexible ultraviolet light cutoff layer and a flexible water and oxygen barrier layer, can reduce the ultraviolet light transmittance of the photovoltaic panel, improve the ultraviolet resistance of the photovoltaic panel, and can reduce the oxygen and water vapor transmittance, improve the water and oxygen barrier performance of the photovoltaic panel. While ensuring the strength and hardness of the photovoltaic panel, it can also endow the photovoltaic panel with flexibility to meet the requirements of flexible perovskite battery modules; in further cooperation with a prepolymer layer of the adhesive film and a conductive wire mesh layer, the prepolymer layer of the adhesive film can bond and encapsulate the perovskite battery and the photovoltaic panel, so there is no need to add and fill an encapsulating adhesive film in the subsequent module preparation process, and the conductive wire mesh layer can ensure that the battery cells can fully contact sunlight and avoid the introduction of redundant conductive wires. Therefore, the introduction of the prepolymer layer of the adhesive film and the conductive wire mesh layer can also greatly simplify the preparation process of subsequent flexible perovskite battery modules, shorten the preparation time of the modules, and improve their preparation efficiency.

[0020] Therefore, the photovoltaic panel for a flexible perovskite battery module of the present utility model can be used as the photovoltaic backplane and / or photovoltaic front panel of a flexible perovskite battery module, can improve the deficiencies of the existing fluorine-free photovoltaic backplane in terms of flexibility, water and oxygen barrier, and ultraviolet light cutoff, improve the stability and service life of flexible perovskite battery modules during long-term outdoor use, and can avoid the introduction of redundant conductive wires and the addition of an encapsulating adhesive film in the subsequent module preparation process, shorten the preparation time of the modules, and improve the preparation efficiency of the modules. Furthermore, it can effectively solve the problems of flexible perovskite battery modules in terms of stability and encapsulation, and contribute to the popularization and application of flexible perovskite battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional structure diagram of a photovoltaic panel for a flexible perovskite battery module of this embodiment.

[0022] Figure 2 It is a schematic structure diagram of the conductive wire mesh layer in a photovoltaic panel for a flexible perovskite battery module of this embodiment.

[0023] Explanation of the reference numerals in the drawings: flexible water and oxygen barrier layer 1; flexible ultraviolet light cutoff layer 2; flexible substrate layer 3; adhesive coating 4; prepolymer layer of the adhesive film 5; conductive wire mesh layer 6; wire mesh 61. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0025] Embodiment

[0026] A photovoltaic panel for a flexible perovskite battery module of this embodiment, see Figure 1-2, including a flexible water and oxygen barrier layer 1, a flexible ultraviolet light cutoff layer 2, a flexible substrate layer 3, an adhesive coating 4, a prepolymer layer 5 of the adhesive film, and a conductive wire mesh layer 6, which are stacked in sequence from the outside to the inside.

[0027] In this embodiment, the flexible water and oxygen barrier layer 1 is in contact with the external air, so the flexible water and oxygen barrier layer 1 is located on the outermost layer of the entire photovoltaic panel (that is, the layer farthest from the flexible perovskite battery in the entire photovoltaic panel); while the conductive wire mesh layer 6 is in contact with the perovskite solar cell, so the conductive wire mesh layer 6 is located on the innermost layer of the entire photovoltaic panel (that is, the layer closest to the flexible perovskite battery in the entire photovoltaic panel).

[0028] Among them, the flexible water and oxygen barrier layer 1 is a room temperature self-curing silicone resin layer. This room temperature self-curing silicone resin layer is a non-fluorine layer, which is more environmentally friendly; since no fillers are added, this room temperature self-curing silicone resin layer has high density, and has excellent hardness and strength after complete curing, and helps to improve the water and oxygen barrier performance and weather resistance of the photovoltaic panel. Moreover, compared with the water-based nano-silicone ceramic coating in the fluorine-free photovoltaic backplane shown in the publication number CN218665878U, the room temperature self-curing silicone resin layer in the photovoltaic panel for the flexible perovskite battery module of this embodiment also has excellent flexibility and can adapt to the flexible perovskite solar cell module. The thickness of this room temperature self-curing silicone resin layer is 10-15 microns, preferably 12 microns.

[0029] In practice, this room temperature self-curing silicone resin layer can be coated before the preparation of the photovoltaic module, or it can also be coated after the completion of the preparation of the photovoltaic module. To ensure that the inner layer coating of the photovoltaic panel is not damaged during transportation and installation, this room temperature self-curing silicone resin layer is preferably coated before the preparation of the photovoltaic module.

[0030] Among them, the flexible ultraviolet light cutoff layer 2 is an ultraviolet light cutoff acrylic resin coating or silicone resin coating, which has high ultraviolet light cutoff ability, so it can effectively prevent ultraviolet light from damaging the perovskite battery and can improve the ultraviolet resistance of the photovoltaic panel itself. The thickness of the flexible ultraviolet light cutoff layer 2 is 5-10 microns, preferably 6 microns.

[0031] Furthermore, the flexible ultraviolet light cutoff layer 2 is preferably an acrylic resin coating or silicone coating that resists ultraviolet and is transparent to infrared radiation; in this way, it can also improve the visible light transmittance and infrared radiation ability of the photovoltaic panel, which is helpful for improving the visible light absorption of the photovoltaic module, and is helpful for improving the heat dissipation effect of the photovoltaic module and reducing the working temperature of the photovoltaic module. In addition, the flexible ultraviolet light cutoff layer 2 is a non-fluorine coating, which is more environmentally friendly.

[0032] Among them, the flexible substrate layer 3 is a transparent PET layer. The thickness of the transparent PET layer is 260 - 350 microns, preferably 280 microns. The transparent PET layer can provide mechanical support for the photovoltaic panel, improve the visible light transmittance of the photovoltaic panel, and also help improve the water and oxygen barrier properties of the photovoltaic panel.

[0033] Among them, the adhesive coating 4 is a polyester coating, which is a non-fluorine adhesive coating with better environmental performance. The thickness of the polyester coating is 2 - 4 microns, preferably 2 microns. The polyester coating is mainly used to improve the bonding performance between the flexible substrate layer 3 and the prepolymer layer 5 of the adhesive film, improve the interlayer peel strength of the photovoltaic panel, make the structure of the photovoltaic panel more stable and reliable, and further improve the stability and service life of the flexible perovskite battery module during long-term outdoor use.

[0034] Among them, the prepolymer layer 5 of the adhesive film is a combination formed by one or more of a POE adhesive film prepolymer layer, an EVA adhesive film prepolymer layer, an EPE adhesive film prepolymer layer, and a PVB adhesive film prepolymer layer; the thickness of the prepolymer layer 5 of the adhesive film is 100 - 300 microns. The prepolymer layer 5 of the adhesive film is used to bond the perovskite battery and the photovoltaic panel; and during the subsequent preparation process of the flexible perovskite battery module, after the prepolymer layer 5 of the adhesive film is heated and laminated to soften, it can be automatically filled under the lamination pressure, and then can achieve an encapsulation effect, without adding and filling an encapsulation adhesive film during the module preparation process. Therefore, it can simplify the preparation process of the flexible perovskite battery module, shorten its preparation time, improve its preparation efficiency, and contribute to the popularization and application of the flexible perovskite battery module. The prepolymer layer 5 of the adhesive film is preferably an EVA adhesive film prepolymer layer with a thickness of 200 microns.

[0035] Furthermore, to reduce the preparation temperature of the subsequent flexible perovskite battery module and thus ensure the initial stability of the perovskite battery, the prepolymer layer 5 of the adhesive film is preferably a low-temperature cross-linking prepolymer layer of the adhesive film with a cross-linking temperature of 80 - 120 °C.

[0036] Among them, to improve the electrical conductivity of the perovskite battery and ensure that the battery chip can fully contact sunlight, the conductive wire mesh layer 6 is an indium tin oxide wire mesh layer (ITO wire mesh layer) electroplated on the inner surface of the prepolymer layer 5 of the adhesive film; the thickness of the ITO wire mesh layer is 5 - 10 nanometers, preferably 7 nanometers. The ITO wire mesh layer includes several crossed wire meshes 61 (as Figure 2 shown); the wire meshes 61 of the ITO wire mesh layer are mainly used to electrically connect the grid lines of the perovskite solar cell, so that the ITO wire mesh layer can play the role of current collection and current conduction, which can avoid the introduction of redundant conductive wires and does not require additional welding (such as series welding) treatment for several battery chips. Therefore, it can further simplify the preparation process of the flexible perovskite battery module, shorten its preparation time, and improve its preparation efficiency.

[0037] In summary, the photovoltaic panel for the flexible perovskite battery module of this embodiment can improve the deficiencies of the existing fluorine-free photovoltaic backplane in terms of flexibility, water and oxygen barrier, and ultraviolet light cut-off, enhance the stability and service life of the flexible perovskite battery module during long-term outdoor use, and can avoid the introduction of redundant conductive wires and the addition of encapsulation adhesive film during the subsequent module preparation process, shortening the module preparation time and improving the module preparation efficiency. Furthermore, it can effectively solve the problems of the flexible perovskite battery module in terms of stability and encapsulation, and contribute to the popularization and application of the flexible perovskite battery module.

[0038] Moreover, the photovoltaic panel for the flexible perovskite battery module of this embodiment is a transparent flexible photovoltaic panel, which can be used as the photovoltaic backplane and / or photovoltaic front panel of the flexible perovskite battery module, and can ensure that the flexible perovskite battery module has excellent flexibility and lightweight characteristics.

[0039] Therefore, a flexible perovskite battery module of this embodiment includes a photovoltaic front panel, a perovskite solar cell, and a photovoltaic backplane stacked in sequence; the photovoltaic front panel and / or photovoltaic backplane is the photovoltaic panel for the flexible perovskite battery module described above in this embodiment to meet the high-quality requirements of the flexible perovskite battery module during long-term outdoor use.

[0040] Preferably, both the photovoltaic front panel and the photovoltaic backplane are the photovoltaic panels for the flexible perovskite battery module described above in this embodiment; this can more effectively solve the key problems of the flexible perovskite battery module in terms of stability and encapsulation material selection, and promote its commercialization process.

[0041] In an example of this embodiment, the photovoltaic panel for the flexible perovskite battery module of this embodiment is used as the photovoltaic front panel and the photovoltaic backplane, and laminated with the prepared perovskite battery at 80 °C for 30 min to obtain a flexible perovskite battery module with high efficiency and high stability.

[0042] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0043] The technical solutions provided by the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A photovoltaic panel for a flexible perovskite battery module, characterized in that, It includes a flexible substrate layer; a flexible ultraviolet light cutoff layer and a flexible water and oxygen barrier layer in contact with the external air are sequentially provided on the outer surface of the flexible substrate layer; A prepolymer layer of the adhesive film and a conductive wire network layer in contact with the perovskite solar cell are sequentially provided on the inner surface of the flexible substrate layer.

2. The photovoltaic panel for a flexible perovskite battery module according to claim 1, characterized in that, The flexible ultraviolet light cutoff layer is an acrylic resin coating or a silicone resin coating that cuts off ultraviolet light, and its thickness is 5-10 microns.

3. A photovoltaic panel for a flexible perovskite battery module according to claim 1 or 2, characterized in that, The flexible ultraviolet light cutoff layer is an acrylic resin coating or a silicone coating that resists ultraviolet light and is transparent to infrared radiation.

4. A photovoltaic panel for a flexible perovskite battery module according to claim 1, characterized in that, The flexible water and oxygen barrier layer is a room temperature self-curing silicone resin layer, and its thickness is 10-15 microns.

5. A photovoltaic panel for a flexible perovskite battery module according to claim 1, characterized in that, The flexible substrate layer is a transparent PET layer, and its thickness is 260-350 microns.

6. A photovoltaic panel for a flexible perovskite battery module according to claim 1, characterized in that, The prepolymer layer of the adhesive film is a combination formed by one or more of a POE adhesive film prepolymer layer, an EVA adhesive film prepolymer layer, an EPE adhesive film prepolymer layer, and a PVB adhesive film prepolymer layer; the thickness of the prepolymer layer of the adhesive film is 100-300 microns.

7. A photovoltaic panel for a flexible perovskite battery module according to claim 1 or 6, characterized in that, The prepolymer layer of the adhesive film is a low temperature cross-linking adhesive film prepolymer layer with a cross-linking temperature of 80-120 °C.

8. A photovoltaic panel for a flexible perovskite battery module according to claim 1, characterized in that, The conductive wire network layer is an indium tin oxide wire network layer electroplated on the inner surface of the prepolymer layer of the adhesive film, and its thickness is 5-10 nanometers, and the wire of the indium tin oxide wire network layer is electrically connected to the grid line of the perovskite solar cell.

9. A photovoltaic panel for a flexible perovskite battery module according to claim 1, characterized in that, It also includes an adhesive coating provided between the flexible substrate layer and the prepolymer layer of the adhesive film; The adhesive coating is a polyester coating, and its thickness is 2-4 microns.

10. A flexible perovskite battery component, characterized in that, It includes a photovoltaic front plate, a perovskite solar cell, and a photovoltaic back plate that are sequentially stacked; the photovoltaic front plate and / or the photovoltaic back plate is a photovoltaic panel for a flexible perovskite battery module according to any one of claims 1-9.

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