CN211789098U - Crystalline silicon-perovskite component - Google Patents
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- CN211789098U CN211789098U CN202020836497.1U CN202020836497U CN211789098U CN 211789098 U CN211789098 U CN 211789098U CN 202020836497 U CN202020836497 U CN 202020836497U CN 211789098 U CN211789098 U CN 211789098U
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Abstract
The utility model discloses a crystal silicon-perovskite subassembly. The crystalline silicon-perovskite battery assembly comprises a crystalline silicon battery assembly and a perovskite battery assembly, the crystalline silicon battery assembly is arranged below the perovskite battery assembly in a laminated mode, the crystalline silicon battery assembly is connected with the perovskite battery assembly in parallel, the positive electrode of the crystalline silicon battery assembly is connected with the positive electrode of the perovskite battery assembly in series to form the positive electrode end of the crystalline silicon-perovskite battery assembly, and the negative electrode of the crystalline silicon battery assembly is connected with the negative electrode of the perovskite battery assembly in series to form the negative electrode end of the crystalline silicon-perovskite battery assembly. The embodiment of the utility model provides a crystal silicon-perovskite subassembly adopts a brand-new crystal silicon perovskite stack subassembly design, and it has the positive negative pole of unified subassembly, and need not to match the current density of lower battery pack, and then has improved crystal silicon-perovskite subassembly's power generation stability, has avoidd the hot spot risk.
Description
Technical Field
The utility model relates to a battery pack, in particular to crystal silicon-perovskite subassembly belongs to photovoltaic module product technical field.
Background
The crystalline silicon-perovskite laminated assembly is an effective path for further improving the existing photovoltaic energy conversion efficiency and reducing the power generation cost, and the existing mainstream photovoltaic assembly is mainly formed by connecting a plurality of monocrystalline silicon cells in series or in series-parallel; the crystal silicon-perovskite lamination research is mainly focused on a small-area battery layer, and the manufacture of the main battery structure comprises the steps of directly forming two-end lamination batteries of perovskite batteries on the crystal silicon batteries, separately manufacturing an upper layer battery and a lower layer battery, and then forming a four-terminal lamination battery through mechanical stacking; however, both of these designs suffer from problems of stability, operability based on existing crystalline silicon production lines, and increased cost in large-sized photovoltaic modules.
At present, no formed crystalline silicon-perovskite laminated assembly scheme exists, and the existing two-terminal laminated cell series connection formed assembly has the following defects:
1) a large number of processes need to be changed and optimized to modify and upgrade the existing crystal silicon assembly production line into a two-end laminated assembly, which can greatly increase the cost of the battery;
2) the current of the upper-layer battery and the current of the lower-layer battery are required to be matched, and the battery current is greatly influenced by solar spectrum and incident light angle under an outdoor actual working environment, so that the efficiency is easily influenced by current mismatch;
3) due to the chemical structure of the perovskite battery, the perovskite battery is more prone to aging and fading caused by ion migration compared with a traditional crystalline silicon battery, the perovskite in the two terminal batteries is in direct contact with the crystalline silicon battery, and the risk of ion migration is higher;
4) the use of a two-terminal stack assembly of the same design as a conventional crystalline silicon assembly can be too high in voltage and cause the risk of hot spots to rise, while the direct use of a four-terminal structure to separate crystalline silicon and perovskite assemblies is costly and requires doubling of transmission cables and inverter equipment.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to provide a crystalline silicon-perovskite module, which overcomes the disadvantages of the prior art.
For realizing the purpose of the utility model, the utility model discloses a technical scheme include:
an embodiment of the utility model provides a crystalline silicon-perovskite subassembly, it includes crystalline silicon battery pack and perovskite battery pack, crystalline silicon battery pack with perovskite battery pack parallel connection, and, the positive pole of crystalline silicon battery pack establishes ties and forms with perovskite battery pack's positive pole crystalline silicon-perovskite battery pack's positive pole, crystalline silicon battery pack's negative pole establishes ties and forms with perovskite battery pack's negative pole crystalline silicon-perovskite battery pack's negative pole.
Further, the crystalline silicon battery assembly stack is disposed below the perovskite battery assembly.
Further, the crystalline silicon battery assembly comprises a plurality of crystalline silicon batteries, and the plurality of crystalline silicon batteries are connected in series or in series-parallel.
Further, the crystalline silicon cell comprises a biplate crystalline silicon cell and/or a triplate crystalline silicon cell.
Further, the perovskite battery assembly comprises at least one perovskite battery pack comprising a plurality of perovskite batteries connected in series or in series-parallel.
Further, the area of a single perovskite cell is 0.00125-0.02m2The open-circuit voltage of a single perovskite battery is 0.9-1.2V, and the current density is 10-25mA/cm2。
Still further, the perovskite battery assembly comprises a plurality of perovskite battery packs connected in parallel.
Further, the area of the single perovskite battery is (2.5-10) mm (500-.
Further, the voltage of the perovskite battery component is 30-250V.
Further, the perovskite battery is of a strip-shaped structure.
Further, the plurality of perovskite cells are formed by dividing one large-area perovskite thin film.
Furthermore, a second packaging adhesive film is arranged between the crystalline silicon battery component and the perovskite battery component.
Further, the crystalline silicon-perovskite component further comprises a packaging component matched with the crystalline silicon battery component and the perovskite battery component, and the packaging component comprises packaging glass.
In some specific embodiments, the crystalline silicon-perovskite module comprises a first packaging glass, a first packaging adhesive film, a crystalline silicon battery module, a second packaging adhesive film, a perovskite battery module and a second packaging glass which are sequentially stacked.
Further, the thickness of the first packaging glass is 1.5-4mm, the thickness of the first packaging adhesive film is 0.2-1.5mm, the thickness of the silicon crystal battery component is 100-250 μm, the thickness of the second packaging adhesive film is 0.2-1.5mm, the thickness of the perovskite battery component is 100-2000nm, and the thickness of the second packaging glass is 1.5-4 mm.
Further, the gram weight of the first packaging adhesive film and the second packaging adhesive film is 200-2。
Compared with the prior art, the utility model has the advantages that:
1) the crystalline silicon-perovskite component provided by the embodiment of the utility model has a simple structure, and compared with the existing crystalline silicon component, the crystalline silicon-perovskite component provided by the embodiment of the utility model can obviously improve the power and the photoelectric conversion efficiency of the component and can reduce the power generation cost;
2) the embodiment of the utility model provides a crystal silicon-perovskite subassembly compares in prior art's two terminals and four terminal structure's laminated cell, the embodiment of the utility model provides a crystal silicon-perovskite subassembly is changed and is produced through current crystal silicon production line, and fortune dimension cost is lower, and stability and the performance of expecting ageing decline are better.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a crystalline silicon-perovskite assembly in an exemplary embodiment of the present invention;
fig. 2 is a schematic diagram of a perovskite battery module according to an exemplary embodiment of the present invention;
fig. 3 is a schematic structural diagram of a crystalline silicon cell module according to an exemplary embodiment of the present invention.
Detailed Description
In view of the deficiencies in the prior art, the inventor of the present invention has made extensive studies and practices to provide the technical solution of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
An embodiment of the utility model provides a crystalline silicon-perovskite subassembly, it includes crystalline silicon battery pack and perovskite battery pack, crystalline silicon battery pack with perovskite battery pack parallel connection, and, the positive pole of crystalline silicon battery pack establishes ties and forms with perovskite battery pack's positive pole crystalline silicon-perovskite battery pack's positive pole, crystalline silicon battery pack's negative pole establishes ties and forms with perovskite battery pack's negative pole crystalline silicon-perovskite battery pack's negative pole.
Specifically, referring to fig. 1, a crystalline silicon-perovskite battery assembly includes a crystalline silicon battery assembly, a perovskite battery assembly, and a package structure matched with the crystalline silicon battery assembly and the perovskite battery assembly.
Specifically, the crystalline silicon-perovskite component comprises a first packaging glass 31, a first packaging adhesive film 32, a crystalline silicon battery component 20, a second packaging adhesive film 33, a perovskite battery component 10 and a second packaging glass 34 which are sequentially stacked; the crystalline silicon battery assembly 20 is connected with the perovskite battery assembly 10 in parallel, the positive electrode of the crystalline silicon battery assembly 10 is connected with the positive electrode of the perovskite battery assembly 20 in series and is led out through a lead to form the positive electrode of the crystalline silicon-perovskite assembly, and the negative electrode of the crystalline silicon battery assembly 10 is connected with the negative electrode of the perovskite battery assembly 40 in series and is led out through a lead to form the negative electrode of the crystalline silicon-perovskite assembly.
Specifically, the thickness of the first packaging glass is 1.5-4mm, the thickness of the first packaging adhesive film is 0.2-1.5mm, the thickness of the silicon crystal battery component is 100-2。
Specifically, a person skilled in the art may replace the first packaging glass and the second packaging glass with the water blocking back plate according to actual conditions, and the thickness of the water blocking back plate may be set according to the areas and thicknesses of the first packaging glass and the second packaging glass.
Specifically, the crystalline silicon battery assembly and the perovskite battery assembly should be distributed in the whole assembly as much as possible, that is, the area of the crystalline silicon battery assembly and the area of the perovskite battery assembly should be larger than or equal to the area of the first packaging glass or the second packaging glass, and as the voltage of the crystalline silicon-perovskite assembly can be adjusted by adjusting the number of the batteries and the serial and parallel arrangement of the batteries, no hard requirement is imposed on the voltage of a single crystalline silicon battery assembly or perovskite battery; and, the present invention is not particularly limited to the structure of the single crystalline silicon cell module, which includes, but is not limited to, PERC (single, poly) crystalline silicon, TopCON, HJT, IBC cells, etc., which are mainstream in the market at present.
Specifically, crystalline silicon cells such as two-piece, three-piece or four-piece crystalline silicon cells made of 166mm or 210mm large-area silicon wafers in the market can be used, the plurality of crystalline silicon cells are connected in series or in series-parallel to form a crystalline silicon cell assembly as a lower assembly, and the voltage of an upper perovskite assembly is matched according to the actual maximum power point voltage of the crystalline silicon assembly after perovskite filtering; the method comprises the following steps that a series-parallel connection structure is used, a slender strip-shaped perovskite-type battery is divided into two to three perovskite battery packs, and the perovskite battery packs are connected in parallel to form a perovskite battery assembly serving as an upper layer assembly; the perovskite battery component is manufactured by using a large-area coating technology, and a plurality of perovskite battery cells connected in series-parallel are formed by laser scribing; the two-layer battery assembly is manufactured separately and then laminated to form a laminated assembly, namely a crystalline silicon-perovskite assembly. The voltage of the two layers of battery components is matched to replace the current of the two layers of battery components, so that the power generation stability of the crystalline silicon-perovskite component is improved, and the hot spot risk is avoided.
Specifically, referring to fig. 2, the crystalline silicon battery assembly 10 includes a plurality of crystalline silicon batteries 11, and the plurality of crystalline silicon batteries 11 are connected in series or in series-parallel; specifically, the crystalline silicon cell 11 includes a small crystalline silicon cell divided by a laser cutting method, and the small crystalline silicon cell may be any one of or a combination of two or more of a biplate crystalline silicon cell, a triplate crystalline silicon cell, a quartelate crystalline silicon cell, a quintet crystalline silicon cell, and the like, but is not limited thereto. In particular, the silicon wafers used to form small-scale crystalline silicon cells are also flexible in size, including but not limited to, mainstream M2 (edge pitch 156.75mm, diameter 210mm), square single crystal (158.75mm), and 166mm and 210mm large silicon wafers.
The silicon crystal cell component is a crystal silicon solar cell component and consists of silicon crystal solar cells, among silicon series solar cells, the single crystal silicon solar cell has the highest conversion efficiency and the technology is the most mature, the high-performance single crystal silicon cell is established on the basis of high-quality single crystal silicon materials and related heat-generating processing treatment processes, the cell process of the single crystal silicon is nearly mature, in the cell manufacturing, the technologies of surface texturing, emitter region passivation, partition doping and the like are generally adopted, the developed cell mainly comprises a plane single crystal silicon cell and a groove-carved buried gate electrode single crystal silicon cell, and the conversion efficiency is improved mainly by the single crystal silicon surface microstructure treatment and the partition doping process.
The silicon solar cell is fabricated by texturing the surface of the cell using a photolithography technique to form an inverted pyramid structure, and combining an oxide passivation layer having a predetermined thickness (e.g., 13nm) on the surface thereof with two anti-reflective coatings, and increasing the ratio of the width to the height of the gate electrode through an improved electroplating process, in which the conversion efficiency of the cell is more than 23% and the maximum value is 23.3%.
The monocrystalline silicon solar cell has the highest conversion efficiency undoubtedly, and still occupies the leading position in large-scale application and industrial production, but the cost price of monocrystalline silicon is high due to the influence of the price of monocrystalline silicon materials and corresponding complicated cell processes, so that the cost is very difficult to be greatly reduced.
In particular, referring to fig. 3, the perovskite battery assembly 20 includes at least one perovskite battery pack including a plurality of perovskite batteries 21, the plurality of perovskite batteries 21 being connected in series or in series-parallel.
Specifically, the perovskite battery assembly comprises a plurality of perovskite battery packs which are connected in parallel; wherein the area of a single perovskite cell is 0.00125-0.02m2The open-circuit voltage of a single perovskite battery is 0.9-1.2V, and the current density is 10-25mA/cm2The area of the single perovskite battery is (2.5-10) mm (5500-; the voltage of the perovskite battery component is 30-250V.
Specifically, the perovskite battery is of a strip-shaped structure.
Specifically, the plurality of perovskite batteries are formed by dividing one large-area perovskite thin film, as shown in fig. 2, one large-area perovskite thin film is illustrated as being divided into two perovskite battery packs, and the two perovskite battery packs are connected in parallel, of course, a person skilled in the art needs to divide the large-area perovskite thin film according to actual voltage requirements, the plurality of perovskite batteries may be divided into N perovskite battery packs, the N perovskite battery packs are connected in parallel, N is the total maximum power point voltage of the perovskite battery packs/the total maximum power point voltage of the crystalline silicon battery packs, each perovskite battery pack further includes M perovskite batteries, M is the total maximum power point voltage of the crystalline silicon battery packs/the maximum power point voltage of the single perovskite batteries, unless the total maximum power point voltage is counted as an approximate integer.
Specifically, a perovskite cell module is a perovskite solar cell module, and an organic metal halide perovskite structure solar cell is a solar cell which takes an all-solid-state perovskite structure as a light absorption material. The material has simple preparation process and low cost. The structural general formula of the perovskite material is ABX3Wherein A is an organic cation, B is a metal ion, and X is a halogen group. In the structure, the metal B atom is positioned at the center of the cubic unit cell, the halogen X atom is positioned at the center of the cubic surface, and the organic cation A is positioned at the top of the cubic, so that compared with a structure connected in a common edge and coplanar manner, the perovskite structure is more stable, and the diffusion and the migration of defects are facilitated.
In the perovskite structure for high efficiency solar cells, the a site is usually HC (NH)2)2+(abbreviated as FA +) or CH3NH3 +(MA for short)+) Organic cations, whose main role is to maintain charge balance in the crystal lattice, but the size of the a ion can change the size of the energy gap; when the radius of the A ion is increased, the lattice expands, so that the energy gap is correspondingly reduced, the absorption edge is red-shifted, and therefore, a larger short-circuit current and high battery conversion efficiency of about 16% are obtained, the metal ion B is usually a Pb ion, and Pb has good stability, but is replaced by Ge, Sn and Ti due to toxicity. Taking Sn as an example, the bonding angle of Sn-X-Sn is larger than that of Pb, the energy gap is narrower, and ASnX3Show a very highThe open circuit voltage and the good photoelectric characteristic of the circuit are achieved, and the voltage loss is small.
However, in the same group of elements, the smaller the atomic number, the less stable the element. In order to solve the stability problem, Pb and Sn are combined according to a certain proportion, so that the instability caused by Sn is reduced, and meanwhile, higher conversion efficiency is obtained, the halogen group X is usually iodine, bromine and chlorine, wherein the perovskite solar cell with the iodine group is inferior to the cell with the bromine group in mechanical properties (such as elasticity, strength and the like), the electron absorption spectrum is widened from Cl to I in sequence, the red shift of an energy gap is increased gradually, and the element electronegativity is weakened along with the increase of the atomic weight, the covalent action in the bonding with metal ion B is enhanced, and the ABX is increased3Organo-inorganic halides of the type have different structures at different temperatures.
The basic construction of a perovskite solar cell is typically substrate material/conductive glass (substrate glass plated with an oxide layer)/electron transport layer (titania)/perovskite absorption layer (hole transport layer)/metal cathode.
After incident light is incident through the glass, photons with energy larger than the forbidden band width are absorbed to generate excitons, and then the excitons are separated in the perovskite absorption layer to become holes and electrons which are respectively injected into the transport material. Based on this, perovskites have two types of structures: mesostructured perovskite solar cells were developed based on dye-sensitized solar cells (DSSCs), which have a structure similar to that of DSSCs: perovskite structure nanocrystals attached to mesoporous structured oxides (e.g., TiO)2) And on the framework material, the hole transport material is deposited on the surface of the framework material, and the three materials are jointly used as a hole transport layer. In this structure, a mesoporous oxide (TiO)2) The perovskite-structured material is separated by the planar heterojunction structure and is sandwiched between the hole transport material and the electron transport material. Excitons are separated in the sandwiched perovskite material, which can transport both holes and electrons.
Specifically, when the perovskite material is irradiated by sunlight, the perovskite layer firstly absorbs photons to generate electron-hole pairs, and due to the difference of exciton binding energy of the perovskite material, carriers become free carriers or form excitons, and because the perovskite material usually has lower carrier recombination probability and higher carrier mobility, the diffusion distance and the service life of the carriers are longer; then, the non-recombined electrons and holes are respectively collected by an electron transport layer and a hole transport layer, namely the electrons are transported to the equal electron transport layer from the perovskite layer and finally collected by FTO; the holes are transported from the perovskite layer to the hole transport layer and finally collected by the metal electrode, and of course, the processes are not always accompanied by some losses of carriers, such as reversible recombination of electrons of the electron transport layer with holes of the perovskite layer, recombination of electrons of the electron transport layer with holes of the hole transport layer (in the case of a non-dense perovskite layer), and recombination of electrons of the perovskite layer with holes of the hole transport layer. To improve the overall performance of the cell, these carrier losses should be minimized; finally, the photocurrent is generated through the electrical circuit connecting the FTO and the metal electrode.
Specifically, the crystalline silicon-perovskite component provided by the embodiment of the utility model has a simple structure, and compared with the existing crystalline silicon component, the crystalline silicon-perovskite component provided by the embodiment of the utility model can remarkably improve the power and the photoelectric conversion efficiency of the component, and can reduce the power generation cost; and, the embodiment of the utility model provides a crystal silicon-perovskite subassembly compares in prior art's two-terminal and four terminal structure's laminated cell, the embodiment of the utility model provides a crystal silicon-perovskite subassembly is changeed and is produced through current crystal silicon production line, and fortune dimension cost is lower, and stability and anticipated ageing decline performance are better.
The embodiment of the utility model provides a crystal silicon-perovskite subassembly adopts a brand-new crystal silicon perovskite stack subassembly design, and it has the positive negative pole of unified subassembly, and need not to match the current density of lower battery pack, and then has improved crystal silicon-perovskite subassembly's power generation stability, has avoidd the hot spot risk.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and therefore, the protection scope of the present invention should not be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (16)
1. A crystalline silicon-perovskite battery assembly is characterized by comprising a crystalline silicon battery assembly and a perovskite battery assembly, wherein the crystalline silicon battery assembly is connected with the perovskite battery assembly in parallel, the positive electrode of the crystalline silicon battery assembly is connected with the positive electrode of the perovskite battery assembly in series to form the positive electrode of the crystalline silicon-perovskite battery assembly, and the negative electrode of the crystalline silicon battery assembly is connected with the negative electrode of the perovskite battery assembly in series to form the negative electrode of the crystalline silicon-perovskite battery assembly.
2. A crystalline silicon-perovskite assembly as defined in claim 1, wherein: the crystalline silicon cell assembly stack is disposed below the perovskite cell assembly.
3. A crystalline silicon-perovskite assembly as defined in claim 1 or 2, wherein: the crystalline silicon battery assembly includes a plurality of crystalline silicon batteries connected in series or in series-parallel.
4. A crystalline silicon-perovskite assembly as defined in claim 3, wherein: the crystalline silicon cell comprises a biplate crystalline silicon cell and/or a triplate crystalline silicon cell.
5. A crystalline silicon-perovskite assembly as defined in claim 1 or 2, wherein: the perovskite battery assembly comprises at least one perovskite battery pack comprising a plurality of perovskite batteries connected in series or in series-parallel.
6. According to claim5 the crystalline silicon-perovskite component is characterized in that: the area of a single perovskite cell is 0.00125-0.02m2The open-circuit voltage of a single perovskite battery is 0.9-1.2V, and the current density is 10-25mA/cm2。
7. A crystalline silicon-perovskite assembly as defined in claim 5, wherein: the perovskite battery assembly comprises a plurality of perovskite battery packs connected in parallel.
8. A crystalline silicon-perovskite assembly as defined in claim 7, wherein: the area of the single perovskite battery is (2.5-10) mm (500-.
9. A crystalline silicon-perovskite assembly as defined in claim 7, wherein: the voltage of the perovskite battery component is 30-250V.
10. A crystalline silicon-perovskite assembly as defined in claim 7, wherein: the perovskite battery is of a strip-shaped structure.
11. A crystalline silicon-perovskite assembly as defined in claim 7, wherein: the plurality of perovskite cells are formed by dividing one large-area perovskite thin film.
12. A crystalline silicon-perovskite assembly as defined in claim 1, wherein: and a second packaging adhesive film is also arranged between the crystalline silicon battery component and the perovskite battery component.
13. A crystalline silicon-perovskite assembly as defined in claim 12, wherein: the crystalline silicon-perovskite component further comprises a packaging component matched with the crystalline silicon battery component and the perovskite battery component, and the packaging component comprises packaging glass.
14. The crystalline silicon-perovskite assembly as defined in claim 13, comprising a first packaging glass, a first packaging adhesive film, a crystalline silicon battery assembly, a second packaging adhesive film, a perovskite battery assembly and a second packaging glass which are sequentially stacked.
15. A crystalline silicon-perovskite assembly as defined in claim 14, wherein: the thickness of the first packaging glass is 1.5-4mm, the thickness of the first packaging adhesive film is 0.2-1.5mm, the thickness of the silicon crystal battery component is 100-250 mu m, the thickness of the second packaging adhesive film is 0.2-1.5mm, the thickness of the perovskite battery component is 100-2000nm, and the thickness of the second packaging glass is 1.5-4 mm.
16. A crystalline silicon-perovskite assembly as defined in claim 15, wherein: the gram weight of the first packaging adhesive film and the second packaging adhesive film is 200-2。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497287A (en) * | 2022-04-15 | 2022-05-13 | 浙江爱旭太阳能科技有限公司 | Solar cell composite assembly, preparation method thereof and photovoltaic system |
| CN117750794A (en) * | 2024-02-21 | 2024-03-22 | 西安电子科技大学 | Mosaic perovskite-crystalline silicon solar cell module and preparation method thereof |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497287A (en) * | 2022-04-15 | 2022-05-13 | 浙江爱旭太阳能科技有限公司 | Solar cell composite assembly, preparation method thereof and photovoltaic system |
| CN117750794A (en) * | 2024-02-21 | 2024-03-22 | 西安电子科技大学 | Mosaic perovskite-crystalline silicon solar cell module and preparation method thereof |
| CN117750794B (en) * | 2024-02-21 | 2024-05-03 | 西安电子科技大学 | Mosaic perovskite-crystalline silicon solar cell module and preparation method thereof |
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