CN117976747A - Laminated battery assembly suitable for curved photovoltaic and preparation method thereof - Google Patents
Laminated battery assembly suitable for curved photovoltaic and preparation method thereof Download PDFInfo
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- CN117976747A CN117976747A CN202311757088.7A CN202311757088A CN117976747A CN 117976747 A CN117976747 A CN 117976747A CN 202311757088 A CN202311757088 A CN 202311757088A CN 117976747 A CN117976747 A CN 117976747A
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/50—Photovoltaic [PV] devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/50—Photovoltaic [PV] devices
- H10K30/57—Photovoltaic [PV] devices comprising multiple junctions, e.g. tandem PV cells
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/89—Terminals, e.g. bond pads
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to the technical field of solar photovoltaic equipment, in particular to a laminated battery assembly suitable for curved photovoltaic and a preparation method thereof. The thinner thickness makes the distribution of its inside electric field in the film more even, produces bigger electric field intensity, leads to bigger electrostatic force, can directly paste or use a little pressure sensitive adhesive tape can laminate on the curved surface photovoltaic substrate, be convenient for install and the change of battery unit.
Description
Technical Field
The invention relates to the technical field of solar photovoltaic equipment, in particular to a laminated battery assembly suitable for curved photovoltaic and a preparation method thereof, and particularly relates to preparation and arrangement application of a flexible laminated battery suitable for cylindrical photovoltaic.
Background
With the increasing demand for energy and the pursuit of renewable energy sources, solar photovoltaic technology is becoming an important means for solving energy and environmental problems, with the application of crystalline silicon battery modules being most common.
The traditional rigid solar cell module is usually made of silicon crystal materials, the efficiency is high, the manufacturing cost and the energy consumption are high, meanwhile, the rigid photovoltaic module is limited by application scenes, and the expansion of 'photovoltaic +' products is limited. The flexible perovskite battery becomes an emerging research hot spot due to the characteristics of thinness, high efficiency, flexibility and the like, so that future photovoltaic modules have the possibility of omnibearing stretching, the constraint of the previous application scene is eliminated, the three-dimensional space is extended, the application of the photovoltaic battery with a curved surface and the wearable device with a small curved surface is promoted, and the photovoltaic battery is effectively supplemented.
The flexible perovskite laminated battery module unit is inside submodule, arrange between the battery cell and the specific dimension position of crystalline silicon laminated battery cell arrangement mode does not have specific requirement, when being applied to curved photovoltaic, the photovoltaic module has the different illumination angle difference's of different illumination angle problem, leads to the illumination intensity that different position battery piece received different, and then leads to the photocurrent can't well match, can't realize best current collection efficiency, and even some battery cell produces hot spot effect because the angle shelters from, seriously influences battery normal work and system overall performance.
Disclosure of Invention
The invention provides a laminated battery assembly suitable for curved surface photovoltaic and a preparation method thereof, which are used for solving the defect that the existing solar battery module technology has efficiency loss in a curved surface application scene, realizing the efficient application of the solar battery module on a curved surface, acquiring optimal use efficiency and reducing energy consumption loss, thereby further expanding the application scene of the photovoltaic technology.
The present invention provides a laminated cell assembly suitable for curved photovoltaic, comprising:
Each group of battery strips is formed by sequentially connecting a plurality of flexible laminated batteries in series along a first direction, and each flexible laminated battery is carved into a plurality of battery units which are arranged along a second direction through laser scribing; in the first direction, the battery cells in adjacent two of the flexible laminate batteries are connected in series; each battery unit is divided into a plurality of sub-battery units which are sequentially connected in series along the first direction by laser scribing; the first direction is the axial direction of the curved photovoltaic, and the second direction is perpendicular to the first direction;
and the bus bars are used for converging the currents of the battery bars, a plurality of groups of battery bars are arranged in parallel along the second direction, and the ends of the battery bars in the same direction are connected through the bus bars.
According to the laminated battery assembly suitable for the curved photovoltaic, a plurality of the sub-battery units are connected in series through the welding metal strips, and current is led from the inside of the sub-battery units to the outside through the welding metal strips.
According to the laminated battery assembly suitable for the curved photovoltaic, the bus bar is one of a conductive nano connecting bar, a conductive polymer connecting bar, conductive adhesive, conductive fibers or a copper foil sheet.
According to the laminated battery assembly suitable for the curved photovoltaic, the battery units in the two adjacent flexible laminated batteries in the first direction are connected in series through the electric connector, and the electric connector is one of weather-proof conductive adhesive, a plug-in connector, a flexible circuit board or an elastic wire.
According to the laminated battery component suitable for the curved photovoltaic, the flexible laminated battery comprises a bottom battery unit and a top battery unit which is overlapped on the bottom battery unit;
The bottom battery unit is one of a flexible crystalline silicon battery, a thin film battery or a narrow-band gap perovskite battery;
the top battery cell includes:
A flexible substrate disposed on the bottom cell;
a bottom electrode formed on a side of the flexible substrate facing away from the bottom battery cell;
the first transmission layer is formed on one side of the bottom electrode, which is away from the flexible substrate;
a perovskite light absorption layer formed on one side of the first transmission layer away from the bottom electrode;
the second transmission layer is formed on one side of the perovskite light absorption layer, which is away from the first transmission layer;
And the top electrode is formed on one side of the second transmission layer, which is away from the perovskite light absorption layer.
The flexible laminated cell assembly is one of a double-end all-perovskite laminated cell, a four-end all-perovskite laminated cell, a double-end crystalline silicon-perovskite laminated cell or a four-end crystalline silicon-perovskite laminated cell.
The invention also provides a preparation method of the laminated battery component suitable for the curved surface photovoltaic, which is used for preparing the laminated battery component suitable for the curved surface photovoltaic, and comprises the following steps:
A flexible laminated battery preparation step of preparing a plurality of flexible laminated batteries;
The preparation step of the battery strip, namely connecting the prepared plurality of flexible laminated batteries in series along the curved surface photovoltaic axis direction through an electric connector to form the battery strip;
and connecting the plurality of battery bars through bus bars to finish the preparation of the laminated battery assembly.
According to the preparation method of the laminated battery assembly suitable for the curved photovoltaic, the preparation steps of the flexible laminated battery comprise preparation of a bottom battery unit, preparation of a top battery unit and lamination of the bottom battery unit and the top battery unit.
According to the preparation method of the laminated battery assembly suitable for the curved photovoltaic, the preparation of the bottom battery unit comprises the following steps: selecting one of a flexible crystalline silicon battery, a thin film battery or a narrow bandgap perovskite battery;
the preparation of the top battery cell includes:
S1, forming a bottom electrode on one side of a flexible substrate;
s2, forming a first transmission layer on one side of the bottom electrode, which is away from the flexible substrate;
s3, forming a perovskite light absorption layer on one side of the first transmission layer, which is away from the bottom electrode;
s4, forming a second transmission layer on one side of the perovskite light absorption layer, which is away from the first transmission layer;
s5, forming a top electrode on one side of the second transmission layer away from the perovskite light absorption layer;
the stacking of the bottom cell and the top cell includes: and stacking the prepared top battery unit on the bottom battery unit.
According to the preparation method of the laminated battery assembly suitable for the curved photovoltaic, laser scribing is needed in the preparation process of the flexible laminated battery, so that battery units which are arranged along the second direction are formed, and sub-battery units which are sequentially connected in series along the first direction are formed in the battery units.
According to the laminated battery assembly suitable for the curved photovoltaic and the preparation method thereof, the flexible laminated batteries are connected in series and are electrically connected along the axial direction of the curved photovoltaic through the electric connecting piece to form the laminated battery assembly, so that the incident light intensity of each battery unit in the axial direction of the curved photovoltaic is kept consistent, the current is kept to be better in current matching, the current stability is improved, the current is uniformly distributed, the energy loss caused by the non-uniform current is avoided, the stability and the service life of the battery are improved, the hot spot effect is avoided, and the battery and the module thereof can keep the maximum power output work. The laminated battery assembly has the characteristics of light weight and flexibility, the distribution of an internal electric field in the film is more uniform due to the thinner thickness, larger electric field intensity is generated, larger electrostatic force is caused, and the laminated battery assembly can be directly adhered or adhered to a curved photovoltaic substrate by using a small quantity of pressure-sensitive adhesive tape, so that the laminated battery assembly is very convenient to install and replace a battery unit.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a stacked cell assembly suitable for use in curved photovoltaics according to the present invention;
Fig. 2 is a schematic view of the installation of a stacked cell assembly suitable for curved photovoltaic on curved photovoltaic provided by the present invention;
Fig. 3 is a schematic flow chart of a method for manufacturing a stacked cell assembly suitable for curved photovoltaic provided by the invention.
Reference numerals:
1. a battery bar; 2. a bus bar; 3. a flexible laminate battery; 4. a battery unit; 5. a sub-battery cell; 6. an electrical connection.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The laminated cell assembly suitable for curved photovoltaic and the method of manufacturing the same according to the present invention are described below with reference to fig. 1 to 3.
The invention provides a laminated battery assembly suitable for curved photovoltaic, which is shown in fig. 1, and comprises a plurality of groups of battery bars 1 and bus bars 2, wherein each group of battery bars 1 is formed by sequentially connecting a plurality of flexible laminated batteries 3 in series along a first direction, and each flexible laminated battery 3 is marked into a plurality of battery units 4 which are arranged along a second direction by laser marking; in the first direction, the battery cells 4 in the adjacent two of the flexible laminate batteries 3 are connected in series; each of the battery cells 4 is scribed by laser scribing into a plurality of sub-battery cells 5 connected in series in the first direction in turn; the bus bars 2 are used for converging currents of the battery bars 1, a plurality of groups of the battery bars 1 are arranged in parallel along the second direction, and ends of the battery bars 1 in the same direction are connected through the bus bars 2.
The first direction may be a curved axis direction of the curved photovoltaic, the second direction may be a direction along which the curved surface is curved, and the first direction is a cylindrical axis direction, taking a cylindrical surface as an example, and the second direction is a cylindrical surface outer circumferential surface direction.
It is understood that the laminated cell assembly in this embodiment employs the flexible laminated cell 3, and the flexible laminated cell 3 may employ one of a two-terminal all-perovskite laminated cell, a four-terminal all-perovskite laminated cell, a two-terminal crystalline silicon-perovskite laminated cell, or a four-terminal crystalline silicon-perovskite laminated cell. The flexible laminated battery 3 has the characteristic of high heat absorption and conduction efficiency of the traditional silicon crystal battery, and also has the advantage of flexible bending and stretching of the flexible perovskite battery. The specific dimension positions of the inner sub-modules of the traditional all-perovskite battery cells, the arrangement among the battery cells and the arrangement mode of the crystal silicon laminated battery cells have no specific requirement, when the all-perovskite battery cells are used for curved photovoltaic, the photovoltaic module has the problem of different illumination angles, so that the illumination intensities received by battery pieces at different positions are different, the photocurrents cannot be well matched, the optimal current collection efficiency cannot be realized, and even certain battery cells have hot spot effects due to angle shielding, and the normal operation of the battery and the overall performance of a system are seriously influenced. In this embodiment, referring to fig. 2, the flexible laminated batteries 3 are connected in series along the curved axis direction of the curved photovoltaic to form a battery strip, so as to ensure that the incident light intensity of each flexible laminated battery 3 of the battery strip 1 in the curved photovoltaic axial direction is consistent, so that the current is kept to be better matched, the current stability is improved, the current is uniformly distributed, and the energy consumption loss is reduced. The flexible laminated battery is scored into a plurality of battery units which are arranged along the curved surface bending direction of the curved surface photovoltaic through laser scribing; in the curved surface axis direction of the curved surface photovoltaic, the battery units 4 in the two adjacent flexible laminated batteries 3 are connected in series; each of the battery cells 4 is scribed by laser scribing into a plurality of sub-battery cells 5 connected in series in order along the curved surface axis direction of the curved surface photovoltaic. In combination with the structure shown in fig. 1 and 2, the flexible laminated battery 3 is further thinned, and a plurality of sub-battery units 5 are formed by laser scribing and scribing, wherein the sub-battery units 5 are connected in series in the curved surface axis direction of the curved surface photovoltaic, so that the incident light intensity of each sub-battery unit 5 in the curved surface photovoltaic axial direction is ensured to be consistent, and a plurality of side-by-side battery units 4 are formed in the curved surface bending direction of the curved surface photovoltaic, and are not connected with each other, and the battery units 4 are connected in series in the curved surface axis direction of the curved surface photovoltaic with the battery units 4 in the adjacent flexible laminated battery 3.
Further, the cell strips 1 are connected by the bus bars 2, forming a laminated cell assembly that can be bent along the curved surface of a curved photovoltaic. The flexible laminated cells 3 are electrically connected in series along the axis direction of the curved surface photovoltaic to form the cell strip 1, and then connected through the bus bar 2 along the curved surface bending direction, so that a structure having a thin thickness and flexible bending can be formed. The thinner thickness can lead the electric field distribution inside the laminated battery assembly to be more uniform, generate larger electric field intensity, have larger electrostatic force, can be directly adhered or can be adhered to a curved photovoltaic substrate by using a small quantity of pressure-sensitive adhesive tape, and is very convenient for installation and replacement of battery units; the flexible bending characteristic can enable the flexible laminated battery 3 to be attached to the curved photovoltaic substrate, so that the incident solar light intensity of each battery strip 1 in the axial direction is guaranteed to be consistent, the current is enabled to be well matched, the current stability is improved, the current is evenly distributed, and the energy consumption loss is reduced.
The laminated battery assembly suitable for the curved photovoltaic can improve current collection efficiency, increase current output of a photovoltaic cell, ensure uniform distribution of current on the surface of the whole battery, avoid energy loss caused by nonuniform current, improve stability and service life of the battery, and avoid generating a hot spot effect, so that the battery and a module thereof can keep maximum power output working.
In particular, in some embodiments of a laminated cell assembly suitable for curved photovoltaics, a plurality of the sub-cells 5 are connected in series by means of welded metal strips, and the current is conducted from the inside of the sub-cells 5 to the outside through the welded metal strips. After the series connection is completed, a plurality of the sub-battery cells 5 and the welding metal tape are encapsulated in an encapsulation layer, and the encapsulation material may be Parylene (Parylene), polyimide (PI), thermoplastic Polyolefin (POE), or the like.
The battery units 4 in the two adjacent flexible laminated batteries 3 in the first direction are connected in series along the direction of the curved photovoltaic axis through an electric connector 6, and the electric connector 6 is one of weather-proof conductive adhesive, a plug-in connector, a flexible circuit board or an elastic wire. The electrical connection member 6 can also realize convenient disassembly, installation and replacement of each flexible laminate battery 3 under the basic function of ensuring electrical series connection between the battery units 4.
In other embodiments of the present invention, a laminated cell assembly suitable for use in curved photovoltaics, the flexible laminated cell 3 comprises a bottom cell and a top cell stacked on the bottom cell;
The bottom cell unit can be one of a flexible crystalline silicon cell, a thin film cell or a narrow bandgap perovskite cell; the top battery unit comprises a flexible substrate, a bottom electrode, a first transmission layer, a perovskite light absorption layer, a second transmission layer and a top electrode from bottom to top, wherein the flexible substrate is arranged on the bottom battery unit; a bottom electrode is formed on a side of the flexible substrate facing away from the bottom battery cell; the first transmission layer is formed on one side of the bottom electrode, which is away from the flexible substrate; a perovskite light absorption layer is formed on one side of the first transmission layer, which faces away from the bottom electrode; a second transmission layer is formed on one side of the perovskite light absorption layer, which faces away from the first transmission layer; a top electrode is formed on a side of the second transport layer facing away from the perovskite light absorbing layer.
It can be understood that taking the flexible laminated cell 3 as a crystalline silicon perovskite laminated cell as an example, the layout of the grid line of the front side metallized electrode of the conventional photovoltaic crystalline silicon cell mainly comprises a thin grid line for collecting carriers and a main grid line which is in confluence and series connection, and the photoelectric conversion efficiency can be further improved by optimizing the design of the grid line, namely taking the minimum total power loss of the cell as a basis. The grid line design adopts a mode that the thin grid line and the main grid line are mutually perpendicular, and the design is beneficial to optimizing the current collection efficiency, reducing the current transmission loss and improving the power generation efficiency of the photovoltaic module. The thin grid lines are typically used to collect current, while the main grid lines are used to direct current from the thin grid lines to the electrodes of the cells, which has the advantages of reducing shading losses, reducing current transmission losses, uniform current distribution, reducing light refraction losses, and the like. In this embodiment, a conventional photovoltaic crystalline silicon cell is used as a bottom cell, a layer of flexible substrate is made on the crystalline silicon cell which is not subjected to surface metallization, then a layer of transparent conductive film bottom electrode is deposited on the flexible substrate through magnetron sputtering, then a first transmission layer, a perovskite light absorption layer, a second transmission layer and a top electrode are sequentially formed, a crystalline silicon perovskite laminated cell, i.e. a flexible laminated cell 3, of which the bottom cell is a crystalline silicon cell and the top cell is a perovskite cell is formed, circuit layout design is performed, reasonable serial connection can be ensured between each flexible laminated cell 3, and in particular, serial connection can be performed through an electric connecting piece 6, so that the aims of uniform current distribution, voltage matching and maximum energy collection efficiency are achieved.
The following describes a method for manufacturing a laminated cell assembly suitable for curved photovoltaic, and the method for manufacturing the laminated cell assembly suitable for curved photovoltaic and the laminated cell assembly suitable for curved photovoltaic described above can be referred to correspondingly.
The invention provides a preparation method of a laminated battery assembly suitable for curved photovoltaic, which is used for preparing the laminated battery assembly suitable for curved photovoltaic according to any one of the embodiments, and the preparation process comprises the following steps of:
A flexible laminate battery 3 preparing step of preparing a plurality of flexible laminate batteries 3; laser scribing is required during the fabrication of the flexible laminate battery 3 to form the battery cells 4 arranged in the second direction, and to form the sub-battery cells 5 sequentially connected in series in the first direction within the battery cells 4. Welding the sub-battery cells 5 in series by using a welding metal strip in a welding manner, and guiding a current from the inside of the sub-battery cells 5 to the outside through the welding metal strip; after the welding is completed in series, the sub-battery units 5 and the welding metal belt are packaged in a packaging layer by adopting a packaging material to form a plurality of groups of battery units 4, wherein the packaging material can be one of parylene, polyimide or thermoplastic polyolefin; forming a flexible laminated battery 3 from a plurality of sets of battery cells;
a step of preparing the battery strip 1, wherein a plurality of prepared flexible laminated batteries 3 are connected in series along the direction of the curved photovoltaic axis through an electric connector 6 to form the battery strip 1;
the plurality of battery bars 1 are connected by bus bars 2, and the preparation of the laminated battery assembly is completed.
Wherein the preparation step of the flexible laminated battery 3 comprises the preparation of a bottom battery unit, the preparation of a top battery unit and the stacking of the bottom battery unit and the top battery unit, and specifically, the preparation step of the flexible laminated battery 3 comprises the following steps:
Preparation of bottom cell: selecting one of a flexible crystalline silicon battery, a thin film battery or a narrow bandgap perovskite battery;
Preparation of the top cell:
S1, forming a bottom electrode on one side of a flexible substrate;
s2, forming a first transmission layer on one side of the bottom electrode, which is away from the flexible substrate;
s3, forming a perovskite light absorption layer on one side of the first transmission layer, which is away from the bottom electrode;
s4, forming a second transmission layer on one side of the perovskite light absorption layer, which is away from the first transmission layer;
s5, forming a top electrode on one side of the second transmission layer away from the perovskite light absorption layer;
Stacking of bottom and top cells: and stacking the prepared top battery unit on the bottom battery unit.
It should be understood that the preparation of the bottom cell unit may directly select the corresponding cell as the bottom cell unit, or may also prepare the narrow bandgap perovskite cell as the bottom cell unit, which is the same as the process of preparing the top cell unit, and detailed description thereof will not be provided herein.
The following describes in detail the preparation method of the laminated cell assembly suitable for curved photovoltaic according to the present invention with reference to specific examples.
In yet another embodiment of the present invention, a method for manufacturing a laminated cell assembly suitable for curved photovoltaic, using a double-ended all perovskite laminated cell, the first direction being the curved axis direction of the curved photovoltaic and the second direction being the direction along which the curved surface is curved, is provided as follows:
s1, forming a bottom electrode of a bottom battery unit by magnetron sputtering ITO on a flexible substrate, and carrying out P1 laser scribing on the ITO layer according to a second direction;
S2, spin-coating 0.3mg/ml self-assembled monomolecular film (SAM) solution on the bottom electrode, wherein the spin-coating rotating speed is 4000 rpm, the spin-coating time is 30 seconds, and the spin-coating is kept at 150 ℃ for 10 minutes after the spin-coating is finished, so that the preparation of a hole transport layer (a first transport layer of a bottom battery unit) is completed;
S3, weighing five powders of lead iodide (PbI 2), lead bromide (PbBr 2), formamidine iodine (FAI), methylamine bromine (MABr) and cesium iodide (CsI) according to a required proportion, and preparing by adopting a vacuum sequential evaporation method to form a perovskite active layer of the bottom battery unit;
S4, vapor plating is carried out on the C60 by adopting an organic vapor plating process, and SnO 2 is further deposited by an Atomic Layer Deposition (ALD) device to form a composite electron transport layer (a second transport layer of the bottom battery unit);
S5, transferring the substrate into a magnetron sputtering cabin, depositing a layer of ITO (indium tin oxide) to form a charge composite layer (a top electrode of a bottom battery unit and a bottom electrode of the top battery unit at the same time);
S6, spin coating 3, 4-ethylenedioxythiophene on the charge composite layer: a polystyrene sulfonate (PEDOT: PSS) solution, a rotation speed of 2000 revolutions per minute, a spin-coating time of 30 seconds, heating and maintaining at 130 ℃ for 30 minutes after the spin-coating is finished, naturally cooling to room temperature for annealing, dissolving PTAA in Chlorobenzene (CB) with a concentration of 2mg/mL, spin-coating on the PEDOT: PSS layer, a spin-coating rotation speed of 4000 revolutions per minute, a spin-coating time of 30 seconds, heating and maintaining at 150 ℃ for 20 minutes after the spin-coating is finished, naturally cooling to room temperature for annealing, and forming a hole transport layer (a first transport layer of a top battery unit);
S7, dissolving lead iodide (PbI 2), methyl iodide (MAI), formamidine iodine (FAI) and tin iodide (SnI 2) in a mixed solvent of dimethyl sulfoxide (DMSO) and N, N-Dimethylformamide (DMF) according to a volume ratio of 1:9, heating at 70 ℃ to dissolve completely, then spin-coating on the hole transport layer prepared in the previous step, wherein the spin-coating speed is 2000 revolutions per minute, the spin-coating time is 30 seconds, and the temperature is kept at 70 ℃ for 1 minute after the spin-coating is finished, and then naturally cooling to room temperature to finish annealing to form a perovskite active layer of the top battery unit;
S8, further performing organic evaporation on C60 serving as an electron transport layer (a second transport layer of the top battery unit);
S9, spin-coating an isopropanol saturated solution of Bathocuproine (BCP) on the electron transmission layer in the step S8 to form a buffer layer, wherein the spin-coating speed is 1000 revolutions per minute, the spin-coating time is 30 seconds, and then performing P2 laser scribing and scribing to the first transmission layer of the top battery unit according to a second direction;
S10, transferring the substrate into a metal evaporation cabin, depositing a layer of Ag to form a top electrode of a top battery unit, performing P3 laser scribing and scribing to a first transmission layer of the top battery unit according to a second direction, and performing P4 laser scribing and scribing to contact a flexible substrate according to the first direction to form an internal module of the flexible laminated battery 3;
in the process of preparing and forming the double-end full perovskite laminated battery in the steps S1-S10, a plurality of sub-battery units 5 connected in series along the axial direction of the curved surface photovoltaic are formed through P1 laser scribing, P2 laser scribing and P3 laser scribing, battery units 4 arranged in parallel along the bending direction of the curved surface photovoltaic curved surface are formed inside the flexible laminated battery 3 through P4 laser scribing, and finally, invalid areas around the battery units are subjected to edge trimming scribing through P5 laser scribing, so that the flexible laminated battery 3 shown in the figure 1 is finally formed.
S11, connecting the flexible laminated batteries 3 in series along the curved photovoltaic axis direction through a plug-in type connector (an electric connector 6), specifically, connecting the battery units 4 in two adjacent flexible laminated batteries 3 in series along the curved photovoltaic axis direction through the electric connector 6 to form a battery strip 1;
Arranging a plurality of battery bars 1 according to the bending direction of a curved photovoltaic curved surface, and electrically connecting the end parts of the battery bars 1 through bus bars 2 (filling conductive adhesive in a flexible junction box to electrically connect with each edge metal welding strip to form an output anode and a cathode) to form a flexible laminated battery assembly;
the exposed electrical connection portion is insulated and protected by an insulating weather-resistant coating.
In yet another embodiment of the present invention, a four-terminal all perovskite laminate cell is used in a method of making a laminate cell assembly suitable for use in curved photovoltaics, the method comprising:
1. Preparing a top battery cell:
S1, forming a bottom electrode of a top battery unit by magnetron sputtering ITO on a flexible substrate, and carrying out P1 laser scribing on the ITO layer according to a second direction;
S2, spin-coating an SnO 2 aqueous dispersion liquid diluted with water according to a volume ratio of 1:2 on a bottom electrode, wherein the spin-coating rotating speed is 4000 revolutions per minute, the spin-coating time is 30 seconds, after the spin-coating is finished, the spin-coating is kept at 150 ℃ for 30 minutes, the spin-coating is transferred and placed in an ultraviolet-ozone cleaning machine for cleaning for 20 minutes, then the spin-coating is transferred and placed in a glove box for natural cooling to room temperature to finish annealing, the preparation of an electron transport layer is finished, a carrier transport layer is formed to serve as a first transport layer of a top battery unit, and the first transport layer is an electron transport layer;
S3, weighing five powders of lead iodide (PbI 2), lead bromide (PbBr 2), formamidine iodine (FAI), methylamine bromide (MABr) and cesium iodide (CsI) according to a required proportion, dissolving in a mixed solvent of dimethyl sulfoxide (DMSO) and N, N-Dimethylformamide (DMF), heating to be completely dissolved at 70 ℃ according to the volume ratio of DMSO to DMF of 1:4, spin-coating on the first transmission layer prepared in the previous step, heating at 150 ℃ for 20 minutes, and finishing annealing to form a perovskite active layer of the top battery unit;
S4, dissolving 2,2', 7' -tetra [ N, N-di (4-methoxyphenyl) amino ] -9,9' -spirobifluorene (Spiro-OMeTAD) in Chlorobenzene (CB) solvent with the concentration of 72.3mg/mL, and stirring vigorously to completely dissolve the spirobifluorene. Then, to 1mL of this solution were added 28.8. Mu.L of 4-tert-butylpyridine (4-tert-butylpyridine) and 17.5. Mu.L of lithium bistrifluoromethanesulfonimide (Li-TFSI) in acetonitrile (concentration: 520 mg/mL) in this order, followed by stirring well; then spin-coating the perovskite light absorption layer prepared in the previous step, wherein the spin-coating speed is 4000 rpm, the spin-coating time is 30 seconds, a carrier transmission layer is formed after the spin-coating is finished and is used as a second transmission layer of the top battery unit, the second transmission layer is a hole transmission layer, and then P2 laser scribing is carried out according to a second direction until the hole transmission layer is scribed;
S5, transferring the substrate into a magnetron sputtering cabin, depositing a layer of ITO (indium tin oxide) as a top electrode of a top battery unit, then carrying out P3 laser scribing and scribing to a hole transmission layer according to a second direction, and finally carrying out P4 laser scribing and scribing to contact a flexible substrate according to a first direction so as to form an internal module of the flexible laminated battery 3, thereby completing the wide band gap perovskite solar cell as the top battery unit;
In the process of preparing and forming the top battery unit in the steps S1 to S5, forming a plurality of sub battery units 5 connected in series along the axial direction of the curved surface photovoltaic through P1 laser scribing, P2 laser scribing and P3 laser scribing, forming battery units 4 arranged in parallel along the bending direction of the curved surface photovoltaic curved surface in the top battery unit through P4 laser scribing, and finally trimming and scribing the invalid areas around the battery units through P5 laser scribing and scribing to finally form the top battery unit.
S6, connecting the wide-band-gap perovskite solar cells in series through welding metal strips, and guiding current from the inside of the cells to the outside. The wide band gap perovskite solar cell and the welding metal belt are packaged in the packaging layer through the packaging material.
2. Preparation of bottom cell
S100, forming a bottom electrode of a bottom battery unit by magnetron sputtering ITO on a flexible substrate, and carrying out P1 laser scribing on the ITO layer according to a second direction;
S200, spin-coating 3, 4-ethylenedioxythiophene on the bottom electrode: a polystyrene sulfonate (PEDOT: PSS) solution, the rotation speed is 2000 revolutions per minute, the spin-coating time is 30 seconds, the solution is heated and kept at 130 ℃ for 30 minutes after the spin-coating is finished, the solution is naturally cooled to room temperature for annealing, PTAA is dissolved in Chlorobenzene (CB) and has the concentration of 2mg/mL, the solution is spin-coated on the PEDOT: PSS layer, the spin-coating rotation speed is 4000 revolutions per minute, the spin-coating time is 30 seconds, the solution is heated and kept at 150 ℃ for 20 minutes after the spin-coating is finished, the solution is naturally cooled to room temperature for annealing, and a hole transport layer serving as a first transport layer of a bottom battery unit is formed;
S300, dissolving lead iodide (PbI 2), methyl iodide (MAI), formamidine iodine (FAI) and tin iodide (SnI 2) in a mixed solvent of dimethyl sulfoxide (DMSO) and N, N-Dimethylformamide (DMF) according to a volume ratio of 1:4, heating at 70 ℃ to completely dissolve, then spin-coating on the first transmission layer prepared in the previous step, wherein the spin-coating speed is 2000 revolutions per minute, the spin-coating time is 30 seconds, and the temperature is kept at 70 ℃ for 1 minute after the spin-coating is finished, and then naturally cooling to room temperature to finish annealing to form a perovskite active layer of the bottom battery unit;
s400, further performing organic evaporation on the C60 to form an electron transport layer as a second transport layer of the bottom battery unit;
S500, spin-coating an isopropanol saturated solution of Bathocuproine (BCP) on a second transmission layer to form a buffer layer, spin-coating at a speed of 1000 rpm for 30 seconds, and then scribing a P2 laser scribing line to the first transmission layer of the bottom battery unit according to a second direction;
S600, transferring the substrate into a magnetron sputtering cabin, depositing a layer of ITO (indium tin oxide) as a top electrode of a bottom battery unit, performing P3 laser scribing and scribing to a first transmission layer of the bottom battery unit according to a second direction, and performing P4 laser scribing and scribing according to the first direction until the substrate contacts a flexible substrate to form an inner module of the bottom battery unit, so as to complete the preparation of the narrow-band-gap perovskite solar cell and use the narrow-band-gap perovskite solar cell as the bottom battery;
In the process of preparing the bottom battery unit in the steps S100 to S600, a plurality of sub battery units 5 connected in series along the curved photovoltaic axial direction are formed by P1 laser scribing, P2 laser scribing and P3 laser scribing, battery units 4 arranged in parallel along the curved photovoltaic curved surface bending direction are formed inside the bottom battery unit by P4 laser scribing, and finally, the invalid areas around the battery unit are subjected to edge trimming scribing by P5 laser scribing, so that the bottom battery unit is finally formed.
And S700, connecting the narrow-band-gap perovskite solar cells in series by welding metal strips, and guiding current from the inside of the cells to the outside. The wide band gap perovskite solar cell and the welding metal belt are packaged in the packaging layer through the packaging material.
3. Preparation of laminated cell assembly
After packaging, stacking a top battery unit on a bottom battery unit to form a flexible laminated battery 3, and connecting the prepared plurality of flexible laminated batteries 3 in series along a curved photovoltaic axis through conductive adhesive (an electric connector 6) to form a battery strip 1;
Arranging a plurality of battery bars 1 according to the bending direction of a curved photovoltaic curved surface, and electrically connecting the end parts of the battery bars 1 through bus bars 2 (silver nanowires are electrically connected with each edge metal welding belt in a spraying film forming mode to form output positive and negative electrodes), so as to form a flexible laminated battery assembly;
the exposed electrical connection portion is insulated and protected by an insulating weather-resistant coating.
In one embodiment of the preparation method of the laminated battery assembly suitable for the curved photovoltaic, the preparation method is based on a double-end crystalline silicon-perovskite laminated battery, and comprises the following steps:
S1, selecting a crystalline silicon cell which is not subjected to surface metallization as a bottom cell unit, depositing a layer of transparent conductive film (ITO) through magnetron sputtering, and further depositing nickel oxide on the surface of the ITO;
S2, further evaporating an aprotic alkylsulfonic acid modification layer to serve as a first transmission layer; alkyl sulfonate ions enter a perovskite crystal structure and generate chemical crosslinking, but the crystal structure is not influenced, and the perovskite crystal structure has excellent light stability;
S3, weighing five kinds of powder of lead iodide (PbI 2), lead bromide (PbBr 2), formamidine iodine (FAI), methylamine bromide (MABr) and cesium iodide (CsI) according to a required proportion, adding a mixed solvent of dimethyl sulfoxide (DMSO) and N, N-Dimethylformamide (DMF) into the same reagent bottle, controlling the volume ratio of the two to be 1:4, controlling the concentration of lead ions in a final precursor solution to be 1.4mmol/mL, heating on a hot table at 90 ℃ to fully dissolve the lead ions, cooling to room temperature for standby, spin-coating the solution on a first transmission layer in a two-step mode, wherein the spin-coating speed of the first step is 2000rpm, the spin-coating time of 10 seconds, the spin-coating speed of the second step is 6000 rpm, the spin-coating time of 30 seconds, dropwise adding 100 microlitres of antisolvent above a substrate 15 seconds before the spin-coating of the second step, heating at 100 ℃ for 60 minutes after the spin-coating is finished, and naturally cooling and annealing to form a perovskite active layer;
s4, dissolving a fullerene derivative (PC 61 BM) in a Chlorobenzene (CB) solvent, wherein the concentration is 20mg/mL, and stirring the mixture on a hot table at 60 ℃ for 2 hours; spin-coating the perovskite light absorption layer prepared before, wherein the spin-coating speed is 1000 revolutions per minute, and the spin-coating time is 30 seconds, so that a second transmission layer is formed, and the second transmission layer is a hole transmission layer;
S5, spin-coating an isopropanol saturated solution of Bath Copper (BCP) on the second transmission layer to form a buffer layer, wherein the spin-coating speed is 1000 revolutions per minute, the spin-coating time is 30 seconds, then the solution is transferred into a metal evaporation cabin, and a layer of silver (Ag) grid lines which are arranged in a north-south direction according to the module installation position are evaporated through a mask plate to form a top electrode;
S1-S5, preparing and forming a double-end crystalline silicon-perovskite laminated cell;
The steps of welding and packaging in the above process are not described, but can refer to the preparation process of the two-end full perovskite laminated cell, and not described in detail herein, it is to be understood that when a crystalline silicon cell is adopted as a bottom cell, the cell 4 and the sub-cell 5 do not need to be divided by laser scribing, the prepared two-end crystalline silicon-perovskite laminated cell corresponds to a complete flexible laminated cell 3, and the prepared two-end crystalline silicon-perovskite laminated cells are connected in series along a curved photovoltaic axis plug-in connector (electrical connector 6) to form a cell strip 1;
Arranging a plurality of battery bars 1 according to the bending direction of a curved photovoltaic curved surface, and electrically connecting the end parts of the battery bars 1 through bus bars 2 (filling conductive adhesive in a flexible junction box to electrically connect with each edge metal welding strip to form an output anode and a cathode) to form a flexible laminated battery assembly;
the exposed electrical connection portion is insulated and protected by an insulating weather-resistant coating.
In another embodiment of the method for preparing a laminated cell assembly suitable for curved photovoltaic, the method for preparing the laminated cell assembly comprises the following steps:
S1, sputtering a transparent conductive film (ITO) on a flexible substrate to form a bottom electrode;
S2, spin-coating SnO2 aqueous dispersion diluted with water according to a volume ratio of 1:2 on a bottom electrode, wherein the spin-coating rotating speed is 4000 revolutions per minute, the spin-coating time is 30 seconds, after spin-coating is finished, the spin-coating is kept at 150 ℃ for 30 minutes, the spin-coating is transferred and placed in an ultraviolet-ozone cleaning machine for cleaning for 20 minutes, then the spin-coating is transferred and placed in a glove box for natural cooling to room temperature to finish annealing, and the preparation of an electron transport layer is finished, so that a first transport layer is formed, and the first transport layer is the electron transport layer;
s3, weighing five powders of lead iodide (PbI 2), lead bromide (PbBr 2), formamidine iodine (FAI), methylamine bromide (MABr) and cesium iodide (CsI) according to a required proportion, dissolving in a mixed solvent of dimethyl sulfoxide (DMSO) and N, N-Dimethylformamide (DMF) according to a proportion, heating to be completely dissolved at 70 ℃ with the volume ratio of DMSO to DMF being 1:4, spin-coating on an electron transport layer prepared in the previous step, heating and maintaining for 20 minutes at 150 ℃, and finishing annealing to form a perovskite active layer;
S4, dissolving 2,2', 7' -tetra [ N, N-di (4-methoxyphenyl) amino ] -9,9' -spirobifluorene (Spiro-OMeTAD) in Chlorobenzene (CB) solvent with the concentration of 72.3mg/mL, and stirring vigorously to completely dissolve the spirobifluorene. Then, to 1mL of this solution were added 28.8. Mu.L of 4-tert-butylpyridine (4-tert-butylpyridine) and 17.5. Mu.L of lithium bistrifluoromethanesulfonimide (Li-TFSI) in acetonitrile (concentration: 520 mg/mL) in this order, followed by stirring well; spin-coating the perovskite light absorption layer prepared in the previous step, wherein the spin-coating speed is 4000 rpm, the spin-coating time is 30 seconds, and a second transmission layer is formed after the spin-coating is finished, and the second transmission layer is a hole transmission layer;
S5, transferring the substrate into a magnetron sputtering cabin, depositing a layer of ITO (indium tin oxide) to form a top electrode, and completing the preparation of the wide band gap perovskite solar cell and using the wide band gap perovskite solar cell as a top cell unit;
The steps S1 to S5 are not described in the above process for forming the top battery cell, and the steps of scribing, welding, and packaging are not described in detail herein, but refer to the process for preparing the double-ended all perovskite stacked cell.
S6, connecting the top battery units in series by using welding metal strips in a welding mode, and guiding current from the inside of the battery to the outside;
s7, packaging the top battery unit and the welding metal belt in a packaging layer through packaging materials;
and S8, providing a bottom battery unit, wherein the bottom battery unit adopts a flexible silicon crystal battery, and the prepared top battery unit is stacked on the bottom battery unit to complete the preparation of the flexible laminated battery 3 (four-terminal crystal silicon-perovskite laminated battery).
Connecting the prepared plurality of flexible laminated cells 3 in series along the curved photovoltaic axis through a plug-in type connector (electrical connector 6) to form a cell strip 1;
Arranging a plurality of battery bars 1 according to the bending direction of a curved photovoltaic curved surface, and electrically connecting the end parts of the battery bars 1 through bus bars 2 (filling conductive adhesive in a flexible junction box to electrically connect with each edge metal welding strip to form an output anode and a cathode) to form a flexible laminated battery assembly;
the exposed electrical connection portion is insulated and protected by an insulating weather-resistant coating.
According to the laminated battery assembly suitable for the curved photovoltaic and the preparation method thereof, the incident light intensity of each battery unit in the axial direction of the curved photovoltaic is kept consistent, so that the current is kept to be well matched, the current stability is improved, the current is uniformly distributed, the energy loss caused by nonuniform current is avoided, the stability and the service life of the battery are improved, the hot spot effect is avoided, and the battery and the module thereof can keep the maximum power output work.
The laminated battery assembly has the characteristics of light weight and flexibility, the distribution of an internal electric field in the film is more uniform due to the thinner thickness, larger electric field intensity is generated, larger electrostatic force is caused, and the laminated battery assembly can be directly adhered or adhered to a curved photovoltaic substrate by using a small quantity of pressure-sensitive adhesive tape, so that the laminated battery assembly is very convenient to install and replace a battery unit.
It can be appreciated that the flexible laminated battery in the laminated battery assembly can combine the advantages of different materials, realize higher efficiency and promote the commercialization requirement of the flexible battery; heat accumulation can be reduced by a layered design, and heat management is improved; overall stability can be improved and sensitivity to the environment reduced by the design of the multi-layer stack.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A laminated cell assembly adapted for use in curved photovoltaics, comprising:
Each group of battery strips is formed by sequentially connecting a plurality of flexible laminated batteries in series along a first direction, and each flexible laminated battery is carved into a plurality of battery units which are arranged along a second direction through laser scribing; in the first direction, the battery cells in adjacent two of the flexible laminate batteries are connected in series; each battery unit is divided into a plurality of sub-battery units which are sequentially connected in series along the first direction by laser scribing; the first direction is the axial direction of the curved photovoltaic, and the second direction is perpendicular to the first direction;
and the bus bars are used for converging the currents of the battery bars, a plurality of groups of battery bars are arranged in parallel along the second direction, and the ends of the battery bars in the same direction are connected through the bus bars.
2. The laminated cell assembly according to claim 1, wherein a plurality of the sub-cells are connected in series by a welded metal strip, and a current is guided from the inside of the sub-cells to the outside through the welded metal strip.
3. The laminated cell assembly of claim 1, wherein the bus bar is one of a conductive nano-tie, a conductive polymer tie, a conductive paste, a conductive fiber, or a copper foil sheet.
4. A laminated cell assembly according to any one of claims 1 to 3, wherein the cells of two of the flexible laminated cells adjacent in a first direction are connected in series by an electrical connector, the electrical connector being one of a weather-resistant conductive adhesive, a plug connector, a flexible circuit board or an elastic wire.
5. A laminated cell assembly according to any one of claims 1 to 3, wherein the flexible laminated cell comprises a bottom cell and a top cell laminated to the bottom cell;
The bottom battery unit is one of a flexible crystalline silicon battery, a thin film battery or a narrow-band gap perovskite battery;
the top battery cell includes:
A flexible substrate disposed on the bottom cell;
a bottom electrode formed on a side of the flexible substrate facing away from the bottom battery cell;
the first transmission layer is formed on one side of the bottom electrode, which is away from the flexible substrate;
a perovskite light absorption layer formed on one side of the first transmission layer away from the bottom electrode;
the second transmission layer is formed on one side of the perovskite light absorption layer, which is away from the first transmission layer;
And the top electrode is formed on one side of the second transmission layer, which is away from the perovskite light absorption layer.
6. A stacked cell assembly adapted for use in curved photovoltaic according to any one of claims 1 to 3, wherein the flexible stacked cell is one of a two-terminal all perovskite stacked cell, a four-terminal all perovskite stacked cell, a two-terminal crystalline silicon-perovskite stacked cell or a four-terminal crystalline silicon-perovskite stacked cell.
7. A method for producing the laminated cell assembly suitable for curved photovoltaic, characterized by being used for producing the laminated cell assembly suitable for curved photovoltaic according to any one of claims 1 to 6, comprising:
A flexible laminated battery preparation step of preparing a plurality of flexible laminated batteries;
The preparation step of the battery strip, namely connecting the prepared plurality of flexible laminated batteries in series along the curved surface photovoltaic axis direction through an electric connector to form the battery strip;
and connecting the plurality of battery bars through bus bars to finish the preparation of the laminated battery assembly.
8. The method of claim 7, wherein the flexible laminate battery manufacturing step comprises manufacturing a bottom cell, manufacturing a top cell, and stacking the bottom cell and the top cell.
9. The method for producing a stacked cell assembly suitable for use in curved photovoltaics according to claim 8,
The preparation of the bottom battery unit comprises the following steps: selecting one of a flexible crystalline silicon battery, a thin film battery or a narrow bandgap perovskite battery;
the preparation of the top battery cell includes:
S1, forming a bottom electrode on one side of a flexible substrate;
s2, forming a first transmission layer on one side of the bottom electrode, which is away from the flexible substrate;
s3, forming a perovskite light absorption layer on one side of the first transmission layer, which is away from the bottom electrode;
s4, forming a second transmission layer on one side of the perovskite light absorption layer, which is away from the first transmission layer;
s5, forming a top electrode on one side of the second transmission layer away from the perovskite light absorption layer;
the stacking of the bottom cell and the top cell includes: and stacking the prepared top battery unit on the bottom battery unit.
10. The method of claim 9, wherein laser scribing is required during the fabrication of the flexible laminate battery to form the battery cells arranged in the second direction and to form the sub-battery cells in series in the first direction within the battery cells.
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