CN117062453A - Photovoltaic cell assembly - Google Patents

Photovoltaic cell assembly Download PDF

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Publication number
CN117062453A
CN117062453A CN202311073104.0A CN202311073104A CN117062453A CN 117062453 A CN117062453 A CN 117062453A CN 202311073104 A CN202311073104 A CN 202311073104A CN 117062453 A CN117062453 A CN 117062453A
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CN
China
Prior art keywords
photovoltaic cell
cell assembly
battery
cell
annular
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Pending
Application number
CN202311073104.0A
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Chinese (zh)
Inventor
吕奎
董圣之
陆海峰
邢汝博
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Yungu Guan Technology Co Ltd
Hefei Visionox Technology Co Ltd
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Yungu Guan Technology Co Ltd
Hefei Visionox Technology Co Ltd
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Application filed by Yungu Guan Technology Co Ltd, Hefei Visionox Technology Co Ltd filed Critical Yungu Guan Technology Co Ltd
Priority to CN202311073104.0A priority Critical patent/CN117062453A/en
Publication of CN117062453A publication Critical patent/CN117062453A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
    • H10K39/10—Organic photovoltaic [PV] modules; Arrays of single organic 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
    • H10K30/50—Photovoltaic [PV] devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
    • H10K39/10—Organic photovoltaic [PV] modules; Arrays of single organic PV cells
    • H10K39/18—Interconnections, e.g. terminals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

The application provides a photovoltaic cell assembly. The photovoltaic cell assembly includes: a substrate; the annular battery units are arranged on the substrate and comprise first battery units and second battery units which are distributed in sequence in a first direction; the second battery unit is embedded in the first battery unit, and the first battery unit and the second battery unit are electrically connected in series or the first battery unit and the second battery unit are electrically connected in parallel. The photovoltaic cell assembly provided by the embodiment of the application adopts a structure of combining a plurality of annular cell units, can be suitable for structural design of various special-shaped cell assemblies, and is beneficial to meeting the customization demands of different application scenes on the appearance of the photovoltaic cell.

Description

Photovoltaic cell assembly
Technical Field
The application relates to the technical field of solar cells, in particular to a photovoltaic cell assembly.
Background
Perovskite photovoltaic cells have the advantages of higher photoelectric conversion efficiency, lower cost, environmental protection of materials and the like, and are becoming a popular solar cell. The perovskite battery has wide application prospect in photovoltaic building integration and the like as a flexible photovoltaic battery technology, but the perovskite photovoltaic battery component has defects in the special-shaped appearance design.
Disclosure of Invention
The application provides a photovoltaic cell assembly. Various aspects of embodiments of the application are described below.
In a first aspect, there is provided a photovoltaic cell assembly comprising: a substrate; the annular battery units are arranged on the substrate and comprise first battery units and second battery units which are distributed in sequence in a first direction; the second battery unit is embedded in the first battery unit, and the first battery unit and the second battery unit are electrically connected in series or the first battery unit and the second battery unit are electrically connected in parallel.
In one possible embodiment, the annular battery cell includes a front electrode, a back electrode, and a photoelectric conversion layer between the front electrode and the back electrode.
In one possible embodiment, the outline or the inner outline of the orthographic projection pattern of the annular battery unit on the substrate is a preset pattern.
In one possible embodiment, the first battery cell is an equal-width ring structure, and the second battery cell is an equal-width ring structure.
In one possible embodiment, the width of the first battery cell is the same as the width of the second battery cell.
In one possible embodiment, the area of the first battery cell is the same as the area of the second battery cell.
In one possible embodiment, the photovoltaic cell assembly further comprises: and the central unit is embedded in the center of the photovoltaic cell assembly.
In one possible embodiment, the inner diameter of the central unit is greater than or equal to the width of the first battery unit and less than or equal to 2 times the width of the first battery unit.
In one possible embodiment, the photovoltaic cell assembly further comprises: the first bus line is positioned on the outermost annular battery unit and is connected with the first external lead; and the second bus line is positioned on the central unit and is connected with the second external conducting wire.
In one possible embodiment, the width of the first battery cell is greater than or equal to 5mm and less than or equal to 8mm.
In one possible embodiment, the substrate is a glass substrate.
In one possible embodiment, the photoelectric conversion layer includes any one of the following: perovskite compounds, copper indium gallium selenide compounds, and cadmium telluride compounds.
In one possible embodiment, the photovoltaic cell assembly further comprises: and the packaging layer and the glass cover plate are positioned outside the front electrode.
In one possible implementation, the preset pattern is any one of the following patterns: oval, triangular, trapezoidal, polygonal.
The photovoltaic cell assembly provided by the embodiment of the application adopts a structure in which a plurality of annular cell units are combined. The outline of the annular battery unit can be set according to specific application scenes, and the embodiment of the application can be suitable for structural design of various special-shaped battery components, and is beneficial to meeting the customization demands of different application scenes on the appearance of the photovoltaic cell.
Drawings
Fig. 1 is a schematic structural diagram of a perovskite photovoltaic cell in the related art.
Fig. 2 is a schematic diagram of the constituent cells of the photovoltaic cell of fig. 1 connected in series.
Fig. 3 is a schematic structural diagram of a photovoltaic cell assembly according to an embodiment of the present application.
Fig. 4 is a schematic diagram of one possible implementation of the photovoltaic cell assembly of fig. 3.
Fig. 5 is a schematic diagram of one possible implementation of the constituent elements of the photovoltaic cell assembly of fig. 4.
Fig. 6 a-6 d are schematic illustrations of some possible implementations of the ring-shaped battery cell of fig. 3.
Fig. 7 is a schematic diagram of another possible implementation of the photovoltaic cell assembly of fig. 3.
Detailed Description
In order to facilitate an understanding of the application, the application is described in more detail below on the basis of exemplary embodiments in connection with the accompanying drawings. The same or similar reference numbers are used in the drawings to refer to the same or similar modules. It is to be understood that the drawings are merely illustrative and that the scope of the application is not limited thereto.
Perovskite photovoltaic cells, or perovskite solar cells, are a new type of third generation solar cells that convert light energy into electrical energy. The preparation method has the advantages of potential high conversion efficiency, low cost, simple manufacturing process and the like, becomes one of research hot spots of the current nanotechnology and photoelectric conversion materials, and is a novel solar conversion material which is hopeful to replace the traditional solar cell. Perovskite photovoltaic cells have wide application prospects in photovoltaic building integration and near space use as flexible cell technologies.
Compared with the mainstream crystalline silicon photovoltaic technology, the perovskite photovoltaic technology has the advantages that the large-area preparation process is simpler and more efficient. Therefore, the industrialization aim is to directly realize a large-area battery assembly in the production process, rather than post-splicing like crystalline silicon. For large area perovskite photovoltaic cell assemblies, the interior is generally subdivided into a plurality of sub-structural cells (cells). For example, the power supply device can be a regular rectangular or quadrilateral structural subunit, and a plurality of the structural subunits are connected in series to output larger power.
Fig. 1 shows a schematic structural diagram of a typical perovskite photovoltaic cell in the related art. As shown in fig. 1, the perovskite solar cell 100 includes a photovoltaic cell assembly 110, an inverter 120.
The photovoltaic cell assembly 110 is typically a laminated structure and may include, for example, a glass substrate, a hole transport layer, a perovskite absorber layer, an electron transport layer, an electrode layer, and the like. Wherein the perovskite absorption layer is used to convert incident light into electric charge. The hole transmission layer is used for transmitting holes excited by incident light rays in the perovskite absorption layer; meanwhile, the hole transport layer can also block electrons described below, reducing recombination of holes and electrons. The electron transport layer is used for transporting electrons excited by incident light in the perovskite absorption layer, and meanwhile, the electron transport layer can also block holes, so that recombination of the holes and the electrons is reduced.
The photovoltaic cell assembly 110 may be internally subdivided into a plurality of regular rectangular sub-units, which are connected in series. Fig. 2 is a schematic diagram of the series connection of subunits of the photovoltaic cell assembly of fig. 1. As shown in fig. 2, the back electrode of the previous subunit is sequentially connected to the front electrode (i.e., light-incident side electrode) of the next subunit.
The two side subunits of the photovoltaic cell assembly 110 are each provided with a bus bar along the length direction, which is used for collecting and converging current. For example, a first bus bar 111 is provided on the left side subunit, and a second bus bar 112 is provided on the right side subunit.
The photocurrent of the photovoltaic cell assembly 110 enters the inverter 120 through the lead. The inverter 120 can convert the direct current of the battery into alternating current with fixed frequency, fixed voltage or frequency modulation and voltage regulation, so as to facilitate power transmission.
However, the large-area perovskite photovoltaic cell assembly formed by regular rectangular and quadrilateral structural subunits has defects in appearance, and the requirements of various special-shaped appearances of the cell assembly in widely applied scenes such as photovoltaic building integration and the like are difficult to meet.
Therefore, how to design a photovoltaic cell assembly with a profiled shape is a problem to be solved.
Based on the above, the embodiment of the application provides a photovoltaic cell assembly. Fig. 3 is a schematic structural view of a photovoltaic cell assembly according to an embodiment of the present application. A photovoltaic cell assembly according to an embodiment of the present application is described in detail below in conjunction with fig. 3. As shown in fig. 3, the photovoltaic cell assembly 300 may include a substrate and a plurality of annular cells 310.
The substrate may be, for example, a glass substrate or what is known as a glass substrate layer.
A plurality of annular battery cells 310 are provided on the substrate, the plurality of annular battery cells 310 being alternatively referred to as a plurality of annular battery cells. Fig. 3 is a front view of a plurality of annular battery cells 310 on a substrate, and thus the substrate is not shown. The plurality of annular battery cells 310 includes first battery cells 311 and second battery cells 312 that are sequentially arranged in the first direction. The second battery cell 312 is embedded in the first battery cell 311, and the first battery cell 311 and the second battery cell 312 are electrically connected in series, or the first battery cell 311 and the second battery cell 312 are electrically connected in parallel. The first direction may be a direction in which the plurality of annular battery cells are directed outward (outer ring) from the inner (inner ring) or a direction in which the plurality of annular battery cells are directed inward from the outer ring.
Any of the ring-shaped battery cells may include a front electrode, a back electrode, and a photoelectric conversion layer between the front electrode and the electrode. In some implementations, the photoelectric conversion layer may include any one of the following compounds: perovskite compounds, copper indium gallium selenide compounds, and cadmium telluride compounds. The photoelectric conversion layer may be, for example, a crystalline silicon photoelectric conversion layer, and preferably, the photoelectric conversion layer may be a silicon perovskite photoelectric conversion layer.
Wherein the perovskite photoelectric conversion layer is generally formed by a material conforming to ABX 3 Perovskite structured materials are made to convert incident light into electrical charge through the material. Conforming to ABX 3 The perovskite structure material may be MAPbI 3 、MAPbClyI 3-y 、FAPbI 3 、FASnI 3 、Cs p FAqMA 1-p-q PbBryI 3-y And the like. Wherein A is a cation, which may be, for example, methylamine cation (MA+), formamidine cation (FA+), cesium ion (Cs) + ) At least one of (a) and (b); b is a divalent cation, which may be Pb, for example 2+ And Sn (Sn) 2+ 、Ge 2+ 、Cu 2+ At least one of (a) and (b); x is an anion, an anionThe halogen element is generally a halogen element, and the halogen element may be at least one of I-, br-, and Cl-, and p, q, and y are real numbers ranging from 0.0 to 1.0.
The outline or the inner outline of the orthographic projection pattern of the annular battery unit on the substrate is a preset pattern. Such as the outer contour of the first battery unit 311 is a predetermined pattern. The preset pattern can be determined according to the actual application requirement. In some embodiments, the preset graphic may be rectangular. In other embodiments, the preset pattern may be any one of the following patterns: oval, triangular, trapezoidal, polygonal, other combination patterns, etc.
The second battery cell 312 is adjacent to the inner side of the first battery cell 311, and the second battery cell 312 is electrically connected to the first battery cell 311. For example, the back electrode of the second battery cell 312 may be electrically connected in series with the front electrode of the first battery cell 311, or the front electrode of the second battery cell 312 may be electrically connected in series with the back electrode of the first battery cell 311, or the back electrode of the second battery cell 312 may be electrically connected in parallel with the back electrode of the first battery cell 311.
Each annular battery cell is typically a closed-shaped annular battery cell. In some implementations, each annular battery cell is an independent photoelectric conversion unit, and the electrical connection manner between the plurality of annular battery cells may be any of the following manners: connected in series, connected in parallel, or a combination of series and parallel. For example, the connection between the partial ring-shaped battery cells is a series connection, and the connection between the partial ring-shaped battery cells is a parallel connection. In some implementations, each annular battery cell may further include a plurality of independent sub-cells, and corresponding sub-cells of different annular battery cells may be connected in series, and a plurality of sub-cells of the same annular battery cell may be connected in parallel. The embodiment of the application does not particularly limit the electric connection manner among the plurality of annular battery units.
Preferably, the first battery unit 311 has an equal-width annular structure, and the second battery unit 312 has an equal-width annular structure, which is beneficial to uniformly distributing photocurrent along the annular width direction and is convenient for processing and forming.
The outer profile of the first battery cell 311 is identical to the outer profile of the second battery cell 312. Preferably, the width of the first battery cell 311 is the same as the width of the second battery cell 312. In this case, the first battery cell 311 and the second battery cell 312 are often electrically connected in series, and the annular width direction contributes to uniform distribution of photocurrent, and the appearance is beautiful and neat.
In some implementations, the area of the first cell 311 is the same as the area of the second cell 312. In this case, the first battery cell 311 and the second battery cell 312 are mostly electrically connected in parallel.
In some implementations, the photovoltaic cell assembly 300 can also include a central unit. The center unit is embedded in the center of the photovoltaic cell assembly. The central unit may include a front electrode, a back electrode, and a photoelectric conversion layer between the front electrode and the electrode. The outer contour pattern of the central unit is the same as the outer contour pattern of the annular battery unit, and can be a preset pattern. In some embodiments, the central cell may be electrically connected in series with the innermost annular cell. In other embodiments, the central unit may be electrically connected in parallel with the innermost annular battery cells. The central unit is of a non-annular structure and is electrically connected with the innermost annular battery unit, so that the area space of photoelectric conversion can be fully utilized.
The size of the central unit may be dependent on the actual application. Preferably, the inner diameter of the central unit may be greater than or equal to the width of the first battery unit 311 and less than or equal to 2 times the width of the first battery unit 311.
In some implementations, the photovoltaic cell assembly 300 can further include a first bus bar and a second bus bar. The first bus line is located on the outermost annular battery unit and connected with the first external lead. The first external lead is typically connected to a front electrode, e.g. the first bus line is the bus line of the front electrode, otherwise known as the light-entering side electrode, the cathode. The second bus line is located on the central unit and connected to the second external conductor. The second external lead is typically connected to the back electrode, for example the second bus line may be the bus line of the back electrode (anode). Preferably, the first bus line is located at an outer edge of the outermost annular cell and the second bus line is located at an outer edge of the central cell.
In some embodiments, the photovoltaic cell assembly 300 does not include a central cell, and the second bus bar may be located on the innermost annular cell, connected to the second external lead.
The width of the first battery unit 311 may be determined according to practical applications. Preferably, the width of the first battery cell 311 may be greater than or equal to 5mm and less than or equal to 8mm. For example, 5mm, 6mm, 7mm, 8mm, or 5.5mm, 6.5mm, 7.5mm may be used.
In some embodiments, the photovoltaic cell assembly 300 can further include: and the packaging layer and the glass cover plate are positioned outside the front electrode.
The photovoltaic cell assembly provided by the embodiment of the application adopts a structure that a plurality of annular cell units are combined, the outline of each annular cell unit can be set according to specific application scenes, the photovoltaic cell assembly can be suitable for the structural design of various special-shaped cell assemblies, and the customization requirements of different application scenes on the appearance of the photovoltaic cell can be met.
The photovoltaic cell assembly of the embodiments of the present application is further described below in connection with some of the possible implementations of the embodiments of the present application.
Fig. 4 is a schematic diagram of one possible implementation of the photovoltaic cell assembly of fig. 3. As shown in fig. 4, for the photovoltaic cell assembly 400, starting from its outer contour shape, a plurality of annular cell structures are formed on the substrate with equal distances reduced inward; wherein, except the unit structure at the central position, other units are all of equal-width annular structures.
The photovoltaic cell assembly 400 may include: the first battery cell 410, the central unit 440, the first bus line 450, the second bus line 460, the first external lead 470, the second external lead 480.
The first cell 410 is any one of a plurality of annular cells (not innermost) of the photovoltaic cell assembly. The first battery cell 410 may include a front electrode, a back electrode, and a photoelectric conversion layer between the front electrode and the electrode. The photoelectric conversion layer may be, for example, a perovskite photoelectric conversion layer. The outer contour of the first battery cell 410 is a preset pattern. The preset graphics can be determined according to actual application requirements, and the preset graphics can be any one of the following graphics: oval, triangular, trapezoidal, polygonal, other graphics, etc.
The second battery cell is adjacent to the inner side of the first battery cell 410. The second annular battery cell may be electrically connected to the first annular battery cell 410 in series. As shown in the lower view a-a' of fig. 4, the backlight side electrode of the former ring-shaped battery cell may be sequentially connected to the light incident side electrode (front electrode) of the latter ring-shaped battery cell. Typically, the light-entering side electrode is a cathode and the back electrode is an anode.
The first battery cell 410 has an equal-width ring structure, and the plurality of ring-shaped battery cells have the same width. Along the annular width direction, the light current is uniform, the processing is convenient, and the appearance is attractive and neat.
In some embodiments, a series structure of a plurality of annular battery cells can be formed by using a mature laser scribing process and a laser cutting process to adjust rated output voltage and current of the battery assembly.
Fig. 5 is a schematic diagram of one possible implementation of the constituent elements of the photovoltaic cell assembly of fig. 4. As shown in the left side of fig. 5, the width d of the equal-width ring-shaped battery cell 1 May be dependent on the actual situation. Preferably, the width d 1 May be greater than or equal to 5mm and less than or equal to 8mm.
The central unit 440 is located at the inner side (inner side) of the innermost ring-shaped battery cell, and the outer contour of the central unit 440 is identical to the outer contour of the first ring-shaped battery cell 410, i.e., may be a predetermined pattern. The central unit 440 has a non-annular structure and is connected in series with the annular battery cells, contributing to the full use of the area space of photoelectric conversion. As shown on the right side of the view a-a' below fig. 4, the light-incident side electrode of the central unit 440 may be connected to the back electrode of the ring-shaped battery cell adjacent thereto.
The size of the central unit 440 may be dependent on the application requirements. As shown on the right side of fig. 5, the center sheetElement 440 has an inner diameter D 2 Preferably d 1 ≤D 2 ≤2*d 1 。
Preferably, the first bus line 450 is located at the outer edge of the outermost annular cell and is connected to the first external lead 470. The first external lead 470 is typically connected to a front electrode (cathode). The second bus line 460 is located at the outer edge of the central cell, and the second external lead 480 is connected to the second external lead 480, which is typically connected to the back electrode (anode).
In the embodiment of the application, the outer contour (preset pattern) of the outermost special-shaped annular battery cells is taken as the starting point, and the outer contour is reduced inwards at equal distance to form a plurality of annular battery cell structures; except the central unit, other annular battery units are of an equal-width annular structure. A plurality of annular battery cell structures connected in series can be formed by adopting a laser scribing process to adjust rated output voltage and current of the photovoltaic battery assembly. The embodiment of the application can be suitable for structural designs of various special-shaped battery assemblies, and is beneficial to meeting the customization demands of different application scenes on the appearance of the photovoltaic cell.
Fig. 6 a-6 d are schematic illustrations of some possible implementations of the ring-shaped battery cell of fig. 3. The preset patterns of the ring-shaped battery cells include, but are not limited to, the following patterns: oval, triangular, trapezoidal, polygonal, other combination patterns. The preset graphics can also be determined according to the actual application requirements.
Fig. 7 is a schematic diagram of another possible implementation of the photovoltaic cell assembly of fig. 3. As shown in fig. 7, for the photovoltaic cell assembly 700, starting from the shape of its outer edge, the same distance is narrowed inward, forming a plurality of ring-shaped cell structures. Except for the unit structure at the central position, other units are all of equal-width annular structures. Each annular battery unit can comprise a plurality of independent subunits, such as subunits of an area A, an area B and an area C, the corresponding subunits of different annular battery units can be connected in series, and then the subunits of the areas A, the areas B and the areas C of the innermost and outermost annular battery units can be connected in parallel.
As shown in fig. 7, a photovoltaic cell assembly 700 may include: a first battery cell 710, a central unit 740.
The first cell 710 is any one of a plurality of annular cells of the photovoltaic cell assembly. The first ring-shaped battery cell 710 may include a front electrode, a back electrode, and a photoelectric conversion layer between the front electrode and the electrode. The photoelectric conversion layer may be, for example, a perovskite photoelectric conversion layer. The outer contour of the first ring-shaped battery cell 710 is a preset pattern. The preset pattern may be any one of the following patterns: oval, triangular, trapezoidal, polygonal, other combination patterns, etc.
The first ring-shaped battery cell 710 may be divided into three independent sub-units of a region, a B region, and a C region. The areas of the three subunits of the A area, the B area and the C area can be the same or different.
The second battery cell is adjacent to the inner side of the first battery cell 710. The electrical connection between the a-region subunit of the second battery unit and the a-region subunit of the first battery unit 710 may be in series connection, for example, the backlight side electrode of the a-region subunit of the first battery unit 710 is connected to the light incident side electrode (front electrode) of the a-region subunit of the second battery unit. The B-zone sub-unit of the second battery cell and the B-zone sub-unit of the first battery cell 710 may be electrically connected in series; the C-zone sub-units of the second battery cell and the C-zone sub-units of the first battery cell 710 may be electrically connected in series.
The first battery cell 710 has an equal-width ring structure, and the intervals between the plurality of ring-shaped battery cells are the same. Along the annular width direction, the light current is uniformly distributed, the processing is convenient, and the appearance is attractive and neat.
The central unit 740 is embedded in the center of the innermost annular battery cell, and the outer contour pattern of the central unit 740 is identical to the outer contour pattern of the first annular battery cell 710, i.e., the outer contour pattern can be a preset pattern. The central unit 740 has a non-annular structure, and the central unit 740 may be divided into three independent subunits, namely an a area, a B area and a C area, and each subunit is connected in series with the subunits of the a area, the B area and the C area corresponding to the adjacent innermost annular battery unit. Then, the sub-units corresponding to the a region, the B region and the C region of the outermost ring-shaped battery cell and the central unit may be connected in parallel.
Preferably, the first bus line may be located at an outer edge of the outermost annular battery cell, and the first bus line may be divided into a plurality of segments in the region a, the region B, and the region C. The first bus line may be connected to the first external lead 770. The first external lead 770 is typically connected to a front electrode (cathode). The second bus line is located at the outer edge of the central unit, and the second bus line may be divided into a plurality of sections in the region A, the region B and the region C. The second bus line is connected to a second external lead 780, and the second external lead 780 is generally connected to a back electrode (anode).
The embodiment of the application starts from the outline shape (preset pattern) of the outermost special-shaped annular battery cells, and the outline shape is reduced inwards at equal distance to form a plurality of annular battery cell structures, and each annular battery cell can comprise a plurality of independent subunits. Wherein, except the central unit, other annular battery units are all of equal-width annular structures. The rated output voltage and current of the photovoltaic cell assembly can be adjusted by forming a plurality of annular cell structures which are combined in series-parallel through a laser scribing process. The embodiment of the application can be suitable for structural designs of various special-shaped battery assemblies, and is beneficial to meeting the customization demands of different application scenes on the appearance of the photovoltaic cell.
In describing embodiments of the present application, it should be understood that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.
It should be noted that in the embodiments of the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.
It should be understood that the term "and/or" used in the embodiments of the present application is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" in the embodiment of the present application generally indicates that the front and rear association objects are in an or relationship.
In the description of embodiments of the present application, a description of reference to the terms "one embodiment," "some embodiments," "examples," "particular 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 present application. In describing embodiments of the present application, the 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 foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A photovoltaic cell assembly, comprising:
a substrate;
the annular battery units are arranged on the substrate and comprise first battery units and second battery units which are distributed in sequence in a first direction; the second battery unit is embedded in the first battery unit, and the first battery unit and the second battery unit are electrically connected in series or the first battery unit and the second battery unit are electrically connected in parallel.
2. The photovoltaic cell assembly of claim 1, wherein the annular cell comprises a front electrode, a back electrode, and a photoelectric conversion layer between the front electrode and the back electrode.
3. The photovoltaic cell assembly of claim 2, wherein an outer or inner contour of an orthographic pattern of the annular cell on the substrate is a predetermined pattern.
4. The photovoltaic cell assembly of claim 3 wherein the first cell is of an equally wide annular configuration and the second cell is of an equally wide annular configuration.
5. The photovoltaic cell assembly of claim 4, wherein the width of the first cell is the same as the width of the second cell.
6. The photovoltaic cell assembly of claim 3, wherein the area of the first cell is the same as the area of the second cell.
7. The photovoltaic cell assembly of claim 3, further comprising:
and the central unit is embedded in the center of the photovoltaic cell assembly.
8. The photovoltaic cell assembly of claim 7, wherein the inner diameter of the central cell is greater than or equal to the width of the first cell and less than or equal to 2 times the width of the first cell;
optionally, the photovoltaic cell assembly further comprises:
the first bus line is positioned on the outermost annular battery unit and is connected with the first external lead;
and the second bus line is positioned on the central unit and is connected with the second external conducting wire.
9. The photovoltaic cell assembly of any of claims 1-8, wherein the width of the first cell is greater than or equal to 5mm and less than or equal to 8mm;
optionally, the substrate is a glass substrate.
10. The photovoltaic cell assembly according to any one of claims 3-8, wherein the photoelectric conversion layer comprises any one of: perovskite compounds, copper indium gallium selenide compounds, cadmium telluride compounds;
optionally, the photovoltaic cell assembly further comprises: the packaging layer and the glass cover plate are positioned on the outer side of the front electrode;
optionally, the preset pattern is any one of the following patterns: oval, triangular, trapezoidal, polygonal.
CN202311073104.0A 2023-08-24 2023-08-24 Photovoltaic cell assembly Pending CN117062453A (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311073104.0A CN117062453A (en) 2023-08-24 2023-08-24 Photovoltaic cell assembly

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CN117062453A true CN117062453A (en) 2023-11-14

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