Photovoltaic module and photovoltaic power generation system

Abstract

The utility model relates to a photovoltaic assembly and a photovoltaic power generation system. The photovoltaic module comprises a perovskite battery piece and at least one bypass diode, and the perovskite battery piece is connected in parallel with the bypass diode. The photovoltaic assembly provided by the utility model can effectively avoid the adverse effect of the hot spot effect on the assembly, and has high output power and long service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar photovoltaic technical field, especially a kind of photovoltaic module and photovoltaic power generation system. BACKGROUND

[0002] Under certain conditions, when a part of solar cell module in a series branch is shaded or its power generation capacity is reduced due to other reasons, this part of solar cell module will become a load, consume the energy of other normal power generation modules, thereby causing local overheating, which is hot spot effect. This phenomenon can cause the temperature in the hot spot area to rise, thereby affecting the power generation efficiency and life of the solar cell module.

[0003] Perovskite photovoltaic cell belongs to the third generation of solar cells, which can be made more lightweight, and also has the advantages of low cost, easy preparation and high weak light efficiency, and has received extensive attention.

[0004] How to avoid the adverse effects of hot spot effect on the performance of components with perovskite photovoltaic cells has become a problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0005] Therefore, it is necessary to provide a photovoltaic module and a photovoltaic power generation system to solve the problem of the adverse effects of hot spot effect on perovskite photovoltaic modules.

[0006] A photovoltaic module includes a perovskite cell and at least one bypass diode; the perovskite cell is connected in parallel with the bypass diode.

[0007] The above photovoltaic module can effectively avoid the adverse effects of hot spot effect on the module, and has high output power and long life.

[0008] In one embodiment, the interior of the perovskite cell is divided into multiple sub-cells by laser scribing, and the multiple sub-cells are electrically connected.

[0009] In one embodiment, the interior of the perovskite cell is divided into multiple cell units by laser scribing, and each cell unit is connected in parallel with a bypass diode; each cell unit connected in parallel with the bypass diode is further connected in parallel with each other.

[0010] In one embodiment, the interior of each cell unit is divided into multiple sub-cells by laser scribing, and the multiple sub-cells are connected in series.

[0011] In one embodiment, each cell unit has independent power generation function.

[0012] In one of the embodiments, the photovoltaic module further comprises a packaging assembly; the perovskite cell and the bypass diode are packaged in the packaging assembly.

[0013] In one of the embodiments, the photovoltaic module further comprises a junction box; the positive and negative electrodes formed after the perovskite cell and the bypass diode are connected in parallel are led out from the packaging assembly and connected to the junction box.

[0014] In one of the embodiments, the photovoltaic module is a four-terminal laminated photovoltaic module.

[0015] In one of the embodiments, the photovoltaic module further comprises a crystalline silicon cell; the perovskite cell and the crystalline silicon cell are laminated, and the perovskite cell and the crystalline silicon cell are both independent power generation units.

[0016] In one of the embodiments, the crystalline silicon cell is also packaged in the packaging assembly.

[0017] The utility model further provides a photovoltaic power generation system, including any one of photovoltaic module as above.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The photovoltaic module and the photovoltaic power generation system can effectively avoid the adverse effects of hot spot effect on the module, and have high output power and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structure schematic drawing of photovoltaic module in example 1 and example 2;

[0021] Figure 2 It is the structure schematic drawing of photovoltaic module in example 1 and example 3;

[0022] Figure 3 It is the structure schematic drawing of photovoltaic module in example 1 and example 4;

[0023] Figure 4 It is the structure schematic drawing of photovoltaic module in example 1 and example 5;

[0024] Figure 5 It is the structure schematic drawing of photovoltaic module in example 1 and example 6.

[0025] Explanation of reference numerals in the attached drawings: 1. Perovskite solar cell; 11. First solar cell; 12. Second solar cell; 13. Third solar cell; 14. Fourth solar cell; 2. Bypass diode; 21. First bypass diode; 22. Second bypass diode; 23. Third bypass diode; 24. Fourth bypass diode; 3. Encapsulation assembly; 4. Junction box; 41. First junction box; 42. Second junction box; 5. Wire; 6. Crystalline silicon solar cell. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Example 1

[0030] A photovoltaic module, such as Figures 1-4 As shown, it includes a perovskite solar cell 1 and at least one bypass diode 2; the perovskite solar cell 1 and the bypass diode 2 are connected in parallel.

[0031] The inside of the perovskite cell sheet 1 is divided into multiple sub-cells by laser scribing, and the multiple sub-cells are electrically connected. Alternatively, the inside of the perovskite cell sheet 1 is divided into multiple cell units by laser scribing, each cell unit is connected in parallel with a bypass diode 2 (21 / 22 / 23 / 24), the inside of each cell unit is divided into multiple sub-cells by laser scribing, the multiple sub-cells are connected in series, and each cell unit has an independent power generation function; each cell unit connected in parallel with the bypass diode 2 (21 / 22 / 23 / 24) is further connected in parallel with each other through a wire 5. The wire 5 can be a conductive copper strip.

[0032] The above-mentioned photovoltaic module further comprises an encapsulation assembly 3, which comprises a front plate glass, a back plate glass (or an aluminum back plate) and a glue film; the perovskite cell sheet 1 and the bypass diode 2 (21 / 22 / 23) are encapsulated in the encapsulation assembly 3. The positive and negative electrodes formed after the perovskite cell sheet 1 (or each cell unit) and the bypass diode 2 (21 / 22 / 23) are connected in parallel are led out from the encapsulation assembly 3 and connected to the junction box 4.

[0033] As shown in Figure 5 , the above-mentioned photovoltaic module can further comprise a crystalline silicon cell sheet 6, which is placed in a stack with the perovskite cell sheet 1 to form a four-terminal stacked photovoltaic module.

[0034] Embodiment 2

[0035] A photovoltaic module, specifically a perovskite photovoltaic module, as shown in Figure 1 , comprises a perovskite cell sheet 1, a bypass diode 2, a junction box 4 and an encapsulation assembly 3.

[0036] The inside of the perovskite cell sheet 1 is divided into multiple sub-cells by laser scribing and achieves internal conduction, and forms positive and negative electrodes. The positive electrode of the perovskite cell sheet 1 is connected to the positive electrode of the bypass diode 2, and the negative electrode of the perovskite cell sheet 1 is connected to the negative electrode of the bypass diode 2. The perovskite cell sheet 1 and the bypass diode 2 are sealed in the encapsulation assembly 3, and the positive and negative electrodes formed after the perovskite cell sheet 1 and the bypass diode 2 are connected in parallel are led out from the encapsulation assembly 3 through a wire 5 and connected to the junction box 4. The encapsulation assembly 3 comprises a front plate glass, a back plate glass (or an aluminum back plate) and a glue film. The wire 5 can be a conductive copper strip.

[0037] Embodiment 3

[0038] A photovoltaic module, specifically a perovskite photovoltaic module, as shown in Figure 2 , comprises a perovskite cell sheet 1, a first bypass diode 21, a second bypass diode 22, a junction box 4 and an encapsulation assembly 3.

[0039] The inside of the perovskite cell sheet 1 is divided into a first cell unit 11 and a second cell unit 12 with independent power generation functions by laser scribing in a laser etching manner. The inside of the first cell unit 11 and the second cell unit 12 are each divided into a plurality of sub-cells by laser scribing in a laser etching manner and achieve internal conduction (sub-cells within the same cell unit are connected in series), and form positive and negative electrodes.

[0040] The positive electrode of the first cell unit 11 is connected to the positive electrode of the first bypass diode 21, and the negative electrode of the first cell unit 11 is connected to the negative electrode of the first bypass diode 21; the positive electrode of the second cell unit 12 is connected to the positive electrode of the second bypass diode 22, and the negative electrode of the second cell unit 12 is connected to the negative electrode of the second bypass diode 22. And the first cell unit 11 and the second cell unit 12 share the same positive electrode.

[0041] The above-mentioned each cell unit is connected in parallel with each bypass diode and then connected in parallel by a wire 5, forming the positive and negative electrodes of the perovskite photovoltaic module. The perovskite cell sheet 1, the first bypass diode 21, and the second bypass diode 22 are sealed in the packaging assembly 3. The positive and negative electrodes of the perovskite photovoltaic module are respectively led out of the packaging assembly 3 by the wire 5 and connected to the junction box 4. The wire 5 can be a conductive copper strip. The packaging assembly 3 includes a front plate glass, a back plate glass (or an aluminum back plate), and a film.

[0042] Example 4

[0043] A photovoltaic module, specifically a perovskite photovoltaic module, as shown in Figure 3 includes a perovskite cell sheet 1, a first bypass diode 21, a second bypass diode 22, a third bypass diode 23, a junction box 4, and a packaging assembly 3.

[0044] The inside of the perovskite cell sheet 1 is divided into a first cell unit 11, a second cell unit 12, and a third cell unit 13 with independent power generation functions by laser scribing in a laser etching manner. The inside of the first cell unit 11, the second cell unit 12, and the third cell unit 13 are each divided into a plurality of sub-cells by laser scribing in a laser etching manner and achieve internal conduction (sub-cells within the same cell unit are connected in series), and form positive and negative electrodes.

[0045] The positive terminal of the first battery unit 11 is connected to the positive terminal of the first bypass diode 21, and the negative terminal of the first battery unit 11 is connected to the negative terminal of the first bypass diode 21; the positive terminal of the second battery unit 12 is connected to the positive terminal of the second bypass diode 22, and the negative terminal of the second battery unit 12 is connected to the negative terminal of the second bypass diode 22; the positive terminal of the third battery unit 13 is connected to the positive terminal of the third bypass diode 23, and the negative terminal of the third battery unit 13 is connected to the negative terminal of the third bypass diode 23. Furthermore, the first battery unit 11 and the second battery unit 12 share the same positive terminal, and the second battery unit 12 and the third battery unit 13 share the same negative terminal.

[0046] Each of the aforementioned battery cells is connected in parallel with each bypass diode, and then further connected in parallel via wire 5 to form the positive and negative terminals of the perovskite photovoltaic module. The perovskite battery cell 1, the first bypass diode 21, the second bypass diode 22, and the third bypass diode 23 are sealed within the encapsulation assembly 3. The positive and negative terminals of the perovskite photovoltaic module are led out of the encapsulation assembly 3 via wire 5 and connected to the junction box 4. Wire 5 can be a conductive copper strip. The encapsulation assembly 3 includes a front glass panel, a back glass panel (or an aluminum back panel), and an encapsulating film.

[0047] Example 5

[0048] A photovoltaic module, specifically a perovskite photovoltaic module, such as Figure 4 As shown, it includes a perovskite solar cell 1, a first bypass diode 21, a second bypass diode 22, a third bypass diode 23, a fourth bypass diode 24, a junction box 4, and a package assembly 3.

[0049] The interior of the perovskite solar cell 1 is divided into four independent power generation units: a first battery unit 11, a second battery unit 12, a third battery unit 13, and a fourth battery unit 14, by laser etching. Each of the four battery units (11, 12, 13, and 14) is further divided into multiple sub-cells by laser etching, achieving internal conductivity (sub-cells within the same battery unit are connected in series), and forming positive and negative electrodes.

[0050] The positive terminal of the first battery unit 11 is connected to the positive terminal of the first bypass diode 21, and the negative terminal of the first battery unit 11 is connected to the negative terminal of the first bypass diode 21; the positive terminal of the second battery unit 12 is connected to the positive terminal of the second bypass diode 22, and the negative terminal of the second battery unit 12 is connected to the negative terminal of the second bypass diode 22; the positive terminal of the third battery unit 13 is connected to the positive terminal of the third bypass diode 23, and the negative terminal of the third battery unit 13 is connected to the negative terminal of the third bypass diode 23; the positive terminal of the fourth battery unit 14 is connected to the positive terminal of the fourth bypass diode 24, and the negative terminal of the fourth battery unit 14 is connected to the negative terminal of the fourth bypass diode 24. Furthermore, the first battery unit 11 and the third battery unit 13 share the same positive terminal, and the second battery unit 12 and the fourth battery unit 14 also share the same positive terminal.

[0051] Each of the aforementioned battery cells is connected in parallel with each bypass diode, and then further connected in parallel via wire 5 to form the positive and negative terminals of the perovskite photovoltaic module. The perovskite battery cell 1, the first bypass diode 21, the second bypass diode 22, the third bypass diode 23, and the fourth bypass diode 24 are sealed within the encapsulation assembly 3. The positive and negative terminals of the perovskite photovoltaic module are led out of the encapsulation assembly 3 via wire 5 and connected to the junction box 4. Wire 55 can be a conductive copper strip. The encapsulation assembly 3 includes a front glass panel, a back glass panel (or an aluminum back panel), and an encapsulating film.

[0052] Example 6

[0053] A photovoltaic module, specifically a four-terminal tandem photovoltaic module, such as Figure 5 As shown, it includes a perovskite solar cell 1, a crystalline silicon solar cell 6, a first bypass diode 21, a second bypass diode 22, a first junction box 41, a second junction box 42, and a packaging assembly 3.

[0054] The perovskite solar cell 1 is internally divided into multiple sub-cells by laser etching, achieving internal conductivity (sub-cells within the same cell unit are connected in series), and forming positive and negative electrodes. The positive electrode of the perovskite solar cell 1 is connected to the positive electrode of the first bypass diode 21, and the negative electrode of the perovskite solar cell 1 is connected to the negative electrode of the first bypass diode 21. The crystalline silicon solar cell 6 is stacked on top of the perovskite solar cell 1. Both the perovskite solar cell 1 and the crystalline silicon solar cell 6 are independent power generation units.

[0055] The perovskite solar cell 1, the crystalline silicon solar cell 6, and the first bypass diode 21 are sealed in the encapsulation assembly 3. The positive and negative terminals of the perovskite solar cell 1, connected in parallel with the first bypass diode 21, are led out from the encapsulation assembly 3 and connected to the first junction box 41. The positive and negative terminals of the crystalline silicon solar cell 6, connected in parallel with the second bypass diode 22, are led out from the encapsulation assembly 3 and connected to the second junction box 42. The encapsulation assembly 3 includes a front glass panel, a back glass panel (or an aluminum back panel), and an encapsulating film.

[0056] The technical features of the above-described embodiments can be combined in any manner, and for brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in a contradiction.

[0057] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A photovoltaic module, characterized by, The photovoltaic module comprises a perovskite cell and at least one bypass diode; the perovskite cell is connected in parallel with the bypass diode.

2. The photovoltaic module of claim 1, wherein, The inside of the perovskite cell is divided into a plurality of sub-cells by laser scribing, and the plurality of sub-cells are electrically connected.

3. The photovoltaic module of claim 1, wherein, The inside of the perovskite cell is divided into a plurality of cell units by laser scribing, and each of the cell units is connected in parallel with one of the bypass diodes. Each of the cell units connected in parallel with the bypass diodes is further connected in parallel with each other.

4. The photovoltaic module of claim 3, wherein, The inside of each of the cell units is divided into a plurality of sub-cells by laser scribing, and the plurality of sub-cells are connected in series.

5. The photovoltaic module of claim 3, wherein, Each of the cell units has an independent power generation function.

6. The photovoltaic module of claim 1, wherein, The photovoltaic module further comprises a packaging assembly; the perovskite cell and the bypass diode are packaged in the packaging assembly.

7. The photovoltaic module of claim 6, wherein, The photovoltaic module further comprises a junction box; the positive and negative electrodes formed by the perovskite cell and the bypass diode connected in parallel are led out from the packaging assembly and connected to the junction box.

8. The photovoltaic module of claim 1, wherein, The photovoltaic module is a four-terminal laminated photovoltaic module.

9. The photovoltaic module of claim 8, wherein, The photovoltaic module further comprises a crystalline silicon cell; the perovskite cell and the crystalline silicon cell are laminated, and the perovskite cell and the crystalline silicon cell are both independent power generation units.

10. A photovoltaic power system, characterized by, The photovoltaic module comprises any one of the photovoltaic modules according to claims 1-9.

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