WO2008074224A1

WO2008074224A1 - Flexible photovoltaic cell and manufacturing method of the same

Info

Publication number: WO2008074224A1
Application number: PCT/CN2007/003672
Authority: WO
Inventors: Xiaoming Tao; Xiansheng Xing
Original assignee: The Hong Kong Polytechnic University
Priority date: 2006-12-21
Filing date: 2007-12-19
Publication date: 2008-06-26
Also published as: CN101207160A

Abstract

A flexible photovoltaic cell (1000) and manufacturing method of the same are provided. The flexible photovoltaic cell comprises a transparent sealing layer (1010), at least a sheet flexible electrode (1020) and at least a sheet flexible counter electrode (1030) disposed in a chamber composed of the sealing layer, and an electrolyte (1040) disposed between the electrode and the counter electrode. A side of each layer of said electrodes is adjacent to or adhere to an inner wall of the sealing layer, and said sealing layer is transparent at the position of said sealing layer being adjacent to or adhere to said electrode. An electrode leadout wire (1022) of each layer of said electrodes is connected in parallel. A side of said counter electrode is adjacent to said electrode, and the other side is adjacent to the inner wall of the sealing layer; or a side of said counter electrode is adjacent to a layer of said electrodes, and the other side is adjacent to the other layer of said electrodes.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of battery technologies, and relates to a photovoltaic cell, and more particularly to a flexible photovoltaic cell and a method of fabricating the same. BACKGROUND OF THE INVENTION The use of solar energy is an important measure in today's society to solve energy and environmental problems. In particular, photovoltaic cells that directly convert sunlight into electrical energy have made great breakthroughs in photoelectric conversion rate in the past 15 years, and photovoltaic cells based on oxide semiconductor electrodes are being pushed to practical stages.

A photovoltaic cell based on an oxide semiconductor electrode has a structure and principle in which an electron-transferring electrolyte is disposed between an oppositely disposed oxide semiconductor electrode and a counter electrode. When the oxide semiconductor electrode is irradiated by sunlight, an oxide semiconductor material as a photoelectric conversion material generates separation of electrons and holes, wherein electrons are transported to the counter electrode by a load, and the electrolyte transports electrons to the hole and at the counter electrode The electrons are obtained, and the cycle is repeated, and the photocurrent is continuously generated.

Since the suitable oxide semiconductor material has a wide band gap and requires high-energy ultraviolet excitation in sunlight to produce the above photoelectric conversion process, its solar utilization rate is low. In 1991, Gratzel of Switzerland proposed a Dye-Sensitized Solar Cell (DSC) technology, which uses nanocrystalline mesoporous titanium oxide as the photoelectric conversion material of the electrode and covers the surface of the titanium oxide particles. The organic dye monolayer is surface-treated to greatly increase the active surface area and sunlight utilization of the photoelectric conversion material, so that the photoelectric conversion rate of the dye-sensitized solar cell reaches 10% or more. The dye-sensitized solar cell is therefore also referred to as a Gratzel battery.

A typical dye-sensitized solar cell is a flat structure with a glass or organic high score. As a light-transmissive sealing material, the sub-sheet is coated with a transparent conductive material film on the inner surface of the sheet, such as commonly used indium tin oxide (ITO) or fluorine-containing tin oxide, to form a photoelectric conversion on the surface of the conductive material film. The material layer is subjected to surface dye sensitization and the like to form a light-transmitting conductive electrode; parallel to the electrode, a conductive layer plated on the inner surface of the light-transmitting or opaque sealing sheet is provided (often covered with platinum or carbon A catalytic layer composed of a material) As a counter electrode, an electrolyte that transfers electrons is filled between the two electrodes, such as a commonly used i ₂ /r redox system.

However, it is difficult to manufacture the flat-type dye-sensitized solar cell over a large area because: 1. Since the light-transmitting conductive material film in the battery is limited by the light transmission requirement, a light-transmitting conductive material which is not a good conductor is selected. Such as ITO, if the battery area is increased, the layer resistance will be increased and the photoelectric conversion rate of the battery will be lowered. 2. Since the process of manufacturing the flat battery has many processes, it is performed on the flat plate, including the formation of the transparent conductive material film. The formation of the layer of photoelectric conversion material, the larger the area, the more difficult it is to manufacture the battery. On the other hand, it is also difficult to continuously manufacture the dye-sensitized solar cell of the flat structure because the surface of the light-transmitting sealing material is usually plated with a transparent conductive material, usually by sputtering or plasma forming, which is difficult in this process. The continuation proceeds, and thus the continuation of the next step (i.e., formation of the layer of photoelectric conversion material) is affected. Since it is difficult to continuously manufacture in a large area, it is difficult to make the dye-sensitized solar cell of the flat structure difficult to improve the photoelectric conversion rate and reduce the production cost. In addition, flat battery batteries are less convenient to carry, transport and use.

Some improved technical solutions have been proposed for this. For example, the US patent US 7,022,910

B2 discloses a photovoltaic cell using a fabric electrode, wherein the fabric electrode refers to a conductive fabric having a transmittance of 60% or more (e.g., a woven stainless steel mesh). The method for manufacturing a photovoltaic cell using a fabric electrode is: firstly, the fabric electrode is semi-embedded on the inner side surface of the transparent sealing sheet (particularly a polyester sheet) to form a composite sheet, and if necessary, further in the composite sheet. The surface of the transparent sealing sheet at the mesh of the fabric electrode is coated with a transparent film of conductive material, and then a thin layer of photoelectric conversion material is formed on the inner surface of the composite sheet, and then dye sensitized. The treatment is followed by lamination with the electrolyte layer, the counter electrode layer and the sealing backsheet to form a dye-sensitized solar cell.

However, the technical solution disclosed in the above-mentioned U.S. Patent No. 7,022,910 B2 has the following disadvantages: 1. The fabric electrode has a light transmission requirement, so the material selection is limited; The fabric electrode is sparse, so that the photoelectric conversion material covering the electrode is less, and the photoelectric conversion material covering the surface of the transparent sealing sheet at the mesh is more, which is disadvantageous for improving the conductivity of the electrode, which is further disadvantageous. Increasing the photoelectric conversion rate of the battery; 3. If the conductivity of the electrode is further improved, a method of further plating a film of a light-transmitting conductive material may be employed, which is disadvantageous for continuous manufacturing, so as to be disadvantageous for the reduction of production cost. SUMMARY OF THE INVENTION In view of the above deficiencies of the prior art, a first object of the present invention is to provide a flexible photovoltaic cell that realizes large-area continuous manufacturing while improving the electrical conductivity of the electrode and the photoelectric conversion rate of the battery, and overcomes the conventional photovoltaic The disadvantage that the battery flat structure is inconvenient to use.

A second object of the present invention is to provide a method of fabricating the flexible photovoltaic cell to aid in the continuous manufacture of the flexible photovoltaic cell over a large area.

In order to achieve the above first object, the present invention provides a flexible photovoltaic cell comprising a sealed outer layer, an electrode disposed in a lumen of the sealed outer layer, a counter electrode, and a pair disposed on the electrode and the pair The electrolyte between the electrodes. Wherein, the electrode is provided with an electrode lead-out line, and the counter electrode is provided with a counter electrode lead-out line, and the electrode lead I outgoing line and the opposite-electrode lead-out line respectively penetrate the sealed outer layer to form a bow I An outlet interface; the electrode and the counter electrode are both sheet-like flexible, and at least one layer of the electrode is disposed; each of the electrodes has a side adjacent to or adjacent to an inner wall of the sealing outer layer, And the sealed outer layer is transparent adjacent to or adjacent to the electrode, and the electrode lead lines of each layer in the electrode are connected in parallel; one side of the counter electrode is adjacent to the electrode, The other side is adjacent to the inner wall of the sealed outer layer, or one side adjacent one of the electrodes and the other side adjacent to the other of the electrodes.

For the flexible photovoltaic cell described above, wherein the electrode comprises a layer of flexible conductive fabric, and the flexible conductive fabric is woven from a filament of a good conductor material. The electrode lead wire is disposed in the conductive fabric layer, and a surface thereof is covered with a photoelectric conversion material layer, and the conductive fabric layer is electrically connected to form a conductive integrated structure. The photoelectric conversion material layer covers the entire outer surface of the conductive fabric layer and the connecting end of the lead wire to form a A complete thin layer of layers. Further, the flexible electrode may be further subjected to various surface treatments such as dye sensitization treatment or passivation treatment.

For the flexible photovoltaic cell described above, wherein the counter electrode is a layer of a flexible conductive material, and the flexible conductive material may be a corrosion resistant metal or graphite or the like. The counter electrode lead line is disposed in the conductive material layer, and the conductive material layer may be a conductive fabric layer, a conductive foil layer or a conductive thin film layer. When the conductive material layer is used, the conductive film layer may be attached to one side inner wall surface of the sealing outer layer. Further, the counter electrode may be further subjected to various surface treatments such as catalytic treatment.

In the above flexible photovoltaic cell, the sealed outer layer is made of a sheet-like flexible sealing material and an edge sealing material, or is coated with a flexible sealing material which is flow-deformable and can be cured after molding. Further, the flexible sealing material is an organic polymer material such as polyester, silicone, or an inorganic material such as an inorganic nano material, or a composite such as an inorganic nanoparticle/organic polymer. Materials, etc.

For the above flexible photovoltaic cell, wherein the electrolyte may be a liquid electrolyte or a solid or semi-solid electrolyte. When the electrolyte is a liquid electrolyte, the liquid electrolyte is filled with a space between the electrode and the counter electrode and a remaining space in the inner cavity of the sealed outer layer; or, at the electrode and the Providing a layer of an adsorbent material between the pair of electrodes for fixing the liquid electrolyte and isolating the electrode and the counter electrode, and the layer of adsorbent material is composed of a corrosion-resistant layer of permeable solid material or a gel layer . Whereas when the electrolyte is a solid or semi-solid electrolyte, the solid or semi-solid electrolyte is disposed between the electrode and the counter electrode.

In the above flexible photovoltaic cell, wherein the lead wire interface is at least a pair, and it may be disposed at any suitable portion on the outer surface of the sealing outer layer, such as in the vicinity of the end face in the width direction of the sealing outer layer.

In order to achieve the above second object, the present invention provides a flexible photovoltaic cell manufacturing method comprising the following steps:

Step S1, determining product specifications (including voltage, current size, size, single-sided electrode or double-sided electrode of the battery module, etc.), and preparing components required for manufacturing the flexible photovoltaic battery according to the specifications, including:

a sheet-like flexible electrode, the electrode lead wire is set according to the product specifications, if necessary Surface treatment such as dye sensitization or passivation is also carried out in advance according to actual needs.

The sheet-shaped flexible counter electrode is provided with a counter electrode lead line according to the product specifications, and if necessary, a surface treatment such as catalytic treatment is performed in advance according to actual needs;

The electrolyte and/or the non-adsorbing material are selected according to the product specifications as a liquid electrolyte, or a solid electrolyte, or a semi-solid electrolyte, etc., if necessary, in the case of selecting a liquid electrolyte, according to actual needs. Adsorbent material layer; Flexible sealing material, according to actual needs, the sheet-like flexible sealing material and the edge sealing material, or the coating material is selected, and the coating material refers to a flexible sealing material which can be formed by flow deformation deformation and can be solidified after molding.

Step S2, according to the arrangement manner of each component in the flexible photovoltaic cell, laminating the flexible components of the sheet and guiding the lead wires to form a laminate;

Wherein, the manner of performing the laminating comprises layer-by-layer lamination and/or composite lamination: the layer-by-layer lamination refers to laminating from two adjacent layers and sequentially laminating another layer of adjacent components. Until the lamination of all layers of components is completed;

The composite lamination refers to laminating an adjacent two or more layers into a composite layer assembly, and then laminating each of the composite layer components with other single layer components or composite layer components until all of the layers are completed. Lamination of layer components.

Step S3, sealing the laminate to form a large-scale article of the flexible photovoltaic cell or the flexible photovoltaic cell;

Among them, depending on the choice of flexible sealing material, the specific implementation of sealing the laminate is different:

When the flexible sealing material is a sheet-like flexible sealing material, sealing the laminate is performed by edge sealing, that is, joining the outer edges of the sheet-like flexible sealing material in the laminate to form the flexibility. The sealing outer layer of the photovoltaic cell, the method of sealing the edge includes heat sealing and sealing;

When the flexible sealing material is a coating material, sealing the laminate is performed by coating, that is, coating by a coating method (including dip coating, spraying, brushing, printing, etc.) A material is compounded to the surface of the laminate to form a sealed outer layer of the flexible photovoltaic cell. For the above flexible photovoltaic cell manufacturing method, wherein when the electrolyte is a liquid electrolyte, it is necessary to continue the following steps after the step S3 to form the flexible photovoltaic cell in the case of a liquid electrolyte:

Step S31, forming at least two openings on the side of the sealing laminate; Step S32, injecting the liquid electrolyte into the sealing laminate through the opening;

Step S33, sealing the opening to form the flexible photovoltaic cell.

For the above flexible photovoltaic cell manufacturing method, wherein the large-sized article can also be cut according to the product specification to form a small piece of the flexible photovoltaic cell module product; thus, the module product of the flexible photovoltaic cell is fabricated. The following steps are included: Step S1, preparing components required for manufacturing the flexible photovoltaic cell, including a sheet-like flexible electrode, a sheet-like flexible counter electrode, an electrolyte and/or a non-adsorbing material, and a flexible sealing material;

Step S3, sealing the laminate to form a large-scale system of the flexible photovoltaic cell

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Step S4, cutting the large-scale product or laminate according to a predetermined product specification; Step S5, sealing or sealing the obtained step S4 to form the module product of the flexible photovoltaic cell;

Wherein, in the manufacture of the module product of the flexible photovoltaic cell, the step S3 is an optional executable step, that is, after the step S2 is performed to obtain a large layer, the step S3 is performed to perform a large lamination. Sealing, then performing the step S4 to perform cutting, and finally performing the step S5 to perform module sealing; or, performing. After the step S2 obtains a large layer, the step S4 is directly performed to perform cutting, and then executed. The step S5 performs module sealing.

For the above flexible photovoltaic cell manufacturing method, wherein when the electrolyte is a liquid electrolyte, it is necessary to continue the following steps after the step S5 to form the flexible photovoltaic cell in the case of a liquid electrolyte:

Step S51, forming at least two openings on the side of the edge sealing module; Step S52, injecting the liquid electrolyte into the module through the opening; step S53, sealing the opening to form the flexible photovoltaic cell; and, in the case of manufacturing a liquid electrolyte, the flexibility In the case of a module of a photovoltaic cell, the above steps S31, S32, and S33 are necessarily not performed.

The technical solution of the invention has the following beneficial effects:

First, since the flexible electrode used in the flexible photovoltaic cell of the present invention is a separate component, the flexible photovoltaic cell is not required to form a light-transmitting conductive material layer on the inner surface of the light-transmissive sealing outer layer, thereby improving the conductivity of the electrode. And the photoelectric conversion rate of the battery is favorable for the large-area continuous manufacturing of the battery to reduce the production cost.

Secondly, since the flexible sheet of the flexible photovoltaic cell of the present invention comprises a flexible sealing outer layer, a flexible electrode and a flexible counter electrode, it is advantageous for continuous production of a large area of the battery to reduce the production cost.

Further, since the flexible photovoltaic cell of the present invention is easy to form a sealed structure by using a sheet-like flexible member, and the liquid electrolyte can be stored and fixed by the layer of the adsorbent material, it is possible to use a relatively high-efficiency electrolyte, thereby contributing to improvement of the photoelectric conversion rate of the battery.

Finally, since the flexible photovoltaic cell of the present invention is a flexible sheet structure, it is more convenient to carry, transport and use than a conventional flat cell battery.

In addition, the flexible photovoltaic cell of the present invention can be produced in the same specification on the production line by the corresponding flexible photovoltaic cell manufacturing method of the present invention, and thus can be combined into a battery pack as a battery module, which is advantageous for continuous production of the flexible photovoltaic cell and Practical application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a first embodiment of a flexible photovoltaic cell according to the present invention; FIG. 2 is a schematic structural view of a second embodiment of a flexible photovoltaic cell according to the present invention; Figure 4 is a flow chart of a second embodiment of a method for fabricating a flexible photovoltaic cell of the present invention; Figure 5 is a schematic view of the layer-by-layer lamination mode shown in Figures 4 and 5;

Figure 6 is a schematic view showing the composite lamination mode shown in Figures 4 and 5;

7 is a schematic view of a first embodiment of a flexible photovoltaic cell assembled into a battery pack of the present invention; Figure

Figure 8 is a schematic illustration of a first embodiment of a flexible photovoltaic cell assembled into a battery pack of the present invention.

And, some of the reference numerals are: 1000 is a flexible photovoltaic cell; 1010 is a flexible transparent sealed outer layer, 1011 is a sheet-like flexible sealing material layer; 1020 is a sheet-shaped flexible electrode, 1021 is an electrode lead wire, and 1022 is an electrode Lead line interface; 1030 is a sheet-shaped flexible counter electrode, 1031 is a counter electrode lead line, 1032 is a counter electrode lead line interface; 1040 is an electrolyte, 1041 is a solid or semi-solid electrolyte, 1042 is a liquid electrolyte, and 1043 is an adsorbent material layer . BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the technical solution of the present invention will be further explained by way of specific embodiments, and the advantageous effects that the present invention can bring are also shown.

First, a first embodiment of the flexible photovoltaic cell provided by the present invention will be described in detail with reference to FIG.

As shown in FIG. 1, the flexible photovoltaic cell 1000 includes: a layer of flexible electrodes

1020 and corresponding electrode lead line 1021, electrode lead line interface 1022, a layer of flexible counter electrode 1030 and corresponding counter electrode lead line 1031, counter electrode lead line interface 1032, disposed on the sheet flexible electrode 1020 and An electrolyte 1040 between the sheet-like flexible counter electrodes 1030, and a flexible light-transmissive sealed outer layer 1010 that seals the sheet-like flexible electrode 1020, the sheet-like flexible counter electrode 1030, and the electrolyte 1040 in its inner cavity. among them:

One side of the sheet-like flexible electrode 1020 is adjacent to or adjacent to the inner wall of the flexible sealing outer layer 1010, and the other side is adjacent to the sheet-like flexible counter electrode 1030 to provide a receiving space for the electrolyte 1040.

One side of the sheet-like flexible counter electrode 1030 and the flexible transparent sealing outer layer

The inner wall of 1010 is adjacent or attached, and the other side is adjacent to the flexible electrode 1020 as described above to provide an accommodation space for the electrolyte 1040.

The electrode lead wire 1021 is disposed in the sheet flexible electrode 1020 and is worn The electrode lead-out wire interface 1022 is formed through the flexible light-transmissive sealing outer layer 1010, and the electrode lead-out wire interface 1022 is located near the end face in the width direction of the flexible light-transmitting sealing outer layer 1010. The counter electrode lead line 1031 is disposed in the sheet-like flexible counter electrode 1030, and penetrates the flexible light-transmissive sealing outer layer 1010 to form the counter electrode lead-out line interface 1032, and the counter-electrode lead-out line interface 1032 is located near the other end face in the width direction of the flexible light-transmissive sealing outer layer 1010.

The flexible light transmissive sealing outer layer 1010 is light transmissive at least adjacent to or adjacent to the sheet flexible electrode 1020, thereby enabling the sheet flexible electrode 1020 to receive solar radiation for photoelectric conversion.

The electrolyte 1040 includes a solid or semi-solid electrolyte, or a liquid electrolyte, or a liquid electrolyte and a layer of adsorbent material.

Next, a second embodiment of the flexible photovoltaic cell of the present invention will be described in detail with reference to FIG.

As shown in FIG. 2, the flexible photovoltaic cell 1000 includes: a two-layer flexible electrode

Each of the two layers of sheet-like flexible electrodes 1020 has a side adjacent or adjacent to the inner wall of the flexible sealing outer layer 1010, and the other side is adjacent to the sheet-like flexible counter electrode 1030, respectively. An accommodation space of the electrolyte 1040 is provided.

For the sheet-like flexible counter electrode 1030, as described above, one side thereof is adjacent to one of the two layers of flexible electrodes 1020, and the other side is adjacent to another layer of the two layers of flexible electrodes 1020 to provide a The accommodation space of the electrolyte 1040 is described.

For the electrode lead wires 1021, the electrode lead wires 1021 are respectively disposed in each of the two layers of the sheet-like flexible electrodes 1020, and the two are connected in parallel through the flexible light-transmissive sealing outer layer 1010. The electrode leads to the line interface 1022, and the The electrode lead wire interface 1022 is located near the end face in the width direction of the flexible light-transmissive sealing outer layer 1010.

The counter electrode lead-out line 1031 is disposed in the sheet-like flexible counter electrode 1030, and penetrates the flexible light-transmissive sealed outer layer 1010 to form the counter electrode lead-out line interface 1032, and the counter-electrode lead-out line interface 1032 Located near the other end face in the width direction of the flexible light-transmissive sealing outer layer 1010.

Continuing, a first embodiment of a method of fabricating a flexible photovoltaic cell according to the present invention will be described in detail with reference to FIG. 3 for fabricating the flexible photovoltaic cell provided by the present invention.

As shown in FIG. 3, the manufacturing method of the flexible photovoltaic cell of the present invention comprises the following steps: Step S1, determining a product specification (including a voltage, a current magnitude, a size, a single-sided electrode or a double-sided electrode of the battery module, etc.), and according to the Specifications for preparing the components required for the flexible photovoltaic cell, including sheet-like flexible electrodes, sheet-like flexible counter electrodes, electrolytes and/or non-adsorbing materials, and flexible sealing materials;

Step S3, sealing the laminate to form a large article of the flexible photovoltaic cell or the flexible photovoltaic cell.

For the step S1, it specifically includes the following contents: 1. Selecting the sheet-shaped flexible electrode assembly according to product specifications and pre-setting the electrode lead-out line, and if necessary, performing dye sensitization treatment according to actual needs. Or surface treatment such as passivation treatment; 2. Select the sheet-shaped flexible counter electrode assembly according to the product specifications and pre-set the counter electrode lead-out line, and if necessary, perform surface treatment such as catalytic treatment according to actual needs; According to the product specifications, liquid electrolyte, solid electrolyte, or semi-solid electrolyte is selected. If necessary, in the case of liquid electrolyte, the layer of adsorbent material should be selected according to actual needs. 4. Select flexible sealing material and select tablets according to actual needs. The flexible sealing material and the edge sealing material, or the coating material, which is a flexible sealing material which can be formed by flow deformation deformation and can be cured after molding.

For the step S2, as shown in FIG. 3, the manner in which the lamination is specifically performed is a layer-by-layer lamination S2 and a composite lamination S2 ₂ .

The layer-by-layer lamination S2 ₁ refers to the lamination of two adjacent layers of components, and the lamination of another layer of adjacent components in sequence until the lamination of all the layers is completed. The layer-by-layer layer can be further understood with reference to FIG. 5 . co S2 _{1 ()} shown in Figure 5, in step S1 the stock material selected for forming a flexible sheet-like flexible seal sealing material layer 1011 of assembly 1010, the flexible sheet-shaped electrode assembly 1020, the flexible sheet-shaped electrode And the specific execution order of the layer-by-layer lamination may be : first laminating a layer of the sheet-like flexible sealing material 1011 assembly and the sheet-like flexible counter electrode 1030 having a side adjacent to the flexible sealing outer layer 1010; then sequentially laminating and the sheet-like flexibility The adsorbent material 1043 assembly adjacent to the other side of the electrode 1030 assembly, the sheet flexible electrode 1020 assembly adjacent to the other side of the adsorbent material 1043 assembly, and the sheet flexible electrode 1020 assembly One adjacent to another The sheet-like flexible sealing material 1011 is assembled until the laminate semi-finished product of the flexible photovoltaic cell shown in FIG. 1 is completed.

However, the composite laminate 82 ₂ refers to laminating an adjacent two or more layers into a composite layer assembly, and then laminating each of the composite layer components with other single layer components or composite layer components until completion. The lamination of all of the various layers of components can be further understood with reference to Figure 6 for the composite laminate S2 ₂ . As shown in FIG. 6, the material selected in the step S1 is a sheet-like flexible sealing material 1011 assembly for forming a flexible sealing outer layer 1010, a sheet-like flexible electrode 1020 assembly, a sheet-like flexible counter electrode 1030 assembly, and the like. When the solid or semi-solid electrolyte 1041 assembly of the electrolyte 1040 is formed, and the step S2 is performed by the composite lamination S2 ₂ mode, the specific execution order of the composite lamination S2 ₂ is: The sheet-like flexible sealing material 1011 assembly of the flexible sealing outer layer 1010 and the sheet-like flexible counter electrode 1030 assembly and the sheet-like flexible counter electrode 1020 are respectively laminated adjacent to the flexible sealing outer layer 1010. Forming composite layer assemblies 1011/1020 and 1030/1011, respectively; subsequently laminating the two composite layer components 1011/1020 and 1030/1011, and the solid or semi-solid electrolyte 1041 assembly is filled between the two composite layer components in the sub-lamination process until the final configuration of the flexible photovoltaic as shown in FIG. A semi-finished product of a laminate of batteries.

For the step S3, according to the difference in the selected flexible sealing material in the step S1, the specific manner of performing the step S3 to seal the laminate is different: when the flexible sealing material is as described above In the case of the sheet-like flexible sealing material 1011, the sealing of the laminate is performed by edge sealing, that is, bonding the outer edges of the sheet-like flexible sealing material in the laminate by a heat sealing method or a sealing method to form a a sealed outer layer of a flexible photovoltaic cell; however, when the flexible sealing material is a coating material, sealing the laminate is performed by coating, that is, by coating method (including dip coating, spraying, brushing) Coating, printing, etc.) The coating material is compounded to the surface of the laminate to form a sealed outer layer of the flexible photovoltaic cell.

In addition, when the electrolyte in the step S1 is selected as the liquid electrolyte, it is necessary to continue the following steps after the step S3 to form the flexible photovoltaic cell in the case of the liquid electrolyte: Step S31, Forming at least two openings on the side of the sealing laminate; Step S32, injecting the liquid electrolyte into the sealing laminate through the opening; Step S33, sealing the opening to make a Flexible photovoltaic cell.

Further, a second embodiment of a method for manufacturing a flexible photovoltaic cell according to the present invention will be described in detail with reference to FIG. 4 for manufacturing the flexible photovoltaic cell provided by the present invention, particularly for manufacturing a small-sized module product of the flexible photovoltaic cell. .

As shown in FIG. 4, the method for manufacturing a flexible photovoltaic cell of the present invention, particularly the method for manufacturing a modular article of the flexible photovoltaic cell of the present invention, comprises the following steps:

Step S1, determining product specifications (including voltage, current magnitude, size of the battery module, single-sided electrode or double-sided electrode, etc.), and preparing components required for manufacturing the flexible photovoltaic cell according to the specifications, including a sheet-like flexible electrode , sheet-like flexible counter electrode, electrolyte and/or non-adsorbing material, and flexible sealing material;

Step S3, sealing the laminate to form a large-scale system of the flexible photovoltaic cell Step S4, cutting the large-scale article or laminate according to a predetermined product specification; Step S5, sealing or sealing the obtained modules in the step S4 to form a module product of the flexible photovoltaic cell.

The second embodiment of the flexible photovoltaic cell manufacturing method of the present invention shown in FIG. 4 and the first embodiment of the flexible photovoltaic cell manufacturing method of the present invention shown in FIG. 3 are compared, wherein: the specific execution contents and manners of the steps S1 and S2 are almost complete. The same is not repeated here; however, for the step S3, although the specific content and manner of performing the sealing are the same, the execution timing and subsequent operations are different, and are explained in detail as follows.

First, when the module product of the flexible photovoltaic cell is manufactured by the second embodiment of the flexible photovoltaic cell manufacturing method of the present invention shown in Fig. 4, the step S3 is a selectively executable step (identified by a broken line frame). That is, the specific implementation manner of the second embodiment of the method for manufacturing the flexible photovoltaic cell of the present invention shown in FIG. 4 may be: after performing the step S2 to obtain a large layer, performing the step S3 to perform a large layer sealing, Then, the step S4 is performed to perform the cutting, and finally the step S5 is performed to perform the module sealing. Alternatively, after the step S2 is performed to obtain a large layer, the step S4 is directly performed to perform the cutting, and then the performing is performed. Step S5 performs module sealing.

Next, when the electrolyte in the stock preparation is selected as the liquid electrolyte in the step S1, the step of injecting the liquid electrolyte is performed after the step S5, instead of being performed after the step S3 as described above. That is, when the electrolyte is a liquid electrolyte, it is necessary to continue the following steps after the step S5 to form the flexible photovoltaic cell in the case of a liquid electrolyte: Step S51, in the edge-sealing module Forming at least two openings on the side; step S52, injecting the liquid electrolyte into the module through the opening; step S53, sealing the opening to form the flexible photovoltaic cell;

Finally, in summary, the flexible photovoltaic cell of the present invention can be completely produced in a wide area and continuously in the same specification on the production line by the flexible photovoltaic cell manufacturing method of the present invention because of its structural flexibility and easy sealing. Therefore, the flexible photovoltaic cells can be combined into a battery pack as a battery module, thereby facilitating practical application of the flexible photovoltaic cell. As for how to combine the flexible photovoltaic cell modules of the small pieces into a battery pack, there are two methods of series connection as shown in FIG. 7 and parallel connection as shown in FIG. Since the series connection and the parallel connection of the battery are commonly known in the art, those skilled in the art can generally understand it, and therefore will not be described herein.

It is to be understood that the above summary of the invention and the specific embodiments thereof are intended to illustrate the practical application of the technical solutions provided by the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art can make various modifications, equivalent substitutions, or improvements within the spirit and scope of the invention. The scope of the invention is defined by the appended claims.

Claims

Rights request

A flexible photovoltaic cell comprising a sealed outer layer, an electrode disposed in a lumen of the sealed outer layer, a counter electrode, and an electrolyte disposed between the electrode and the counter electrode; An electrode lead wire is disposed, wherein the counter electrode is provided with a counter electrode lead line, and the electrode lead wire and the counter electrode lead wire respectively penetrate the sealed outer layer to form a lead wire interface; and the feature is:

The electrode and the counter electrode are both sheet-like flexible and provided with at least one layer of the electrode;

Each of the electrodes has a side adjacent or adjacent to an inner wall of the sealing outer layer, and the sealing outer layer is transparent adjacent to or adjacent to the electrode, and at the same time The electrode lead wires of each layer are connected in parallel;

One side of the counter electrode is adjacent to the electrode, and the other side is adjacent to an inner wall of the sealing outer layer, or one side is adjacent to one of the electrodes, and the other side is adjacent to another layer of the electrode .

2. A flexible photovoltaic cell according to claim 1 wherein said electrically flexible conductive fabric layer.

The flexible photovoltaic cell according to claim 2, wherein the surface of the flexible conductive fabric layer is covered with a layer of photoelectric conversion material.

4. The flexible photovoltaic cell of claim 1 wherein the counter electrode is a layer of flexible conductive material.

The flexible photovoltaic cell according to claim 4, wherein the flexible conductive material layer is a conductive fabric layer, or a conductive foil layer, or a conductive thin film layer.

The flexible photovoltaic cell according to any one of claims 1 to 5, wherein the sealing outer layer is made of a sheet-like flexible sealing material and an edge sealing material, or is formed by flowable deformation and can be cured after molding. The flexible sealing material is coated.

The flexible photovoltaic cell according to any one of claims 1 to 5, wherein the electrolyte is a liquid electrolyte, and the liquid electrolyte is filled with the electrode and the The space between the electrodes and the remaining space in the inner cavity of the sealed outer layer, or the liquid electrolyte is also adsorbed to the layer of adsorbent material disposed between the electrode and the counter electrode.

The flexible photovoltaic cell according to any one of claims 1 to 5, wherein the electrolyte is a solid or semi-solid electrolyte, and the solid or semi-solid electrolyte is disposed at the electrode and the counter electrode between.

A method of manufacturing a flexible photovoltaic cell, comprising the steps of:

Step S1, preparing components required for manufacturing the flexible photovoltaic cell according to predetermined product specifications, including a sheet-shaped flexible electrode, a sheet-like flexible counter electrode, an electrolyte and/or a non-adsorbing material, and a flexible sealing material;

10. The method of manufacturing a flexible photovoltaic cell according to claim 9, wherein when the electrolyte is a liquid electrolyte, the following steps are continued after the step S3 to form the flexible state in the case of a liquid electrolyte. Photovoltaic cell: Step S31, forming at least two openings on the side of the sealing laminate; Step S32, injecting the liquid electrolyte into the sealing laminate through the opening;

Step S33, sealing the opening to form the flexible photovoltaic cell.

1 . The method of manufacturing a flexible photovoltaic cell according to claim 9 , further comprising the following steps after the step S2 or the step S3: Step S4, cutting the laminate according to a predetermined product specification. Or a large product of the flexible photovoltaic cell;

Step S5, sealing each of the obtained modules to form the flexible photovoltaic cell.

12. The method of manufacturing a flexible photovoltaic cell according to claim 11, wherein when the electrolyte is a liquid electrolyte, the following steps are continued after the step S5 to form the flexible state in the case of a liquid electrolyte. PV: Step S51, forming at least two openings on the edge of the edge-sealing module; Step S52, injecting the liquid electrolyte into the module through the opening; Step S53, sealing the opening to make the Flexible photovoltaic cells.

The method for manufacturing a flexible photovoltaic cell according to any one of claims 9 to 12, wherein the step S2 is performed by layer-by-layer lamination or by means of wisdom

The method for manufacturing a flexible photovoltaic cell according to any one of claims 9 to 12, wherein, when the flexible sealing material is a sheet-like flexible sealing material, the step S3 is specifically: bonding the laminate The outer edge of the sheet-like flexible sealing material forms a sealed outer layer of the flexible photovoltaic cell.

The method for manufacturing a flexible photovoltaic cell according to any one of claims 9 to 12, wherein, when the flexible sealing material is a coating material, the step S3 is specifically: applying the coating method by a coating method. A sealing material is compounded to the surface of the laminate to form a sealed outer layer of the flexible photovoltaic cell.