Photovoltaic power generation system

Abstract

The invention relates to a photovoltaic power generation system, and relates to the technical field of new energy. The photovoltaic power generation system comprises a photovoltaic module which comprises a plurality of battery pieces which are connected in series; the refrigeration module is arranged on one side of the photovoltaic module and connected with the photovoltaic module, and the area ratio of the refrigeration module to a battery piece of the photovoltaic module is 1: 50-1: 20; and the control module is respectively connected with the photovoltaic module and the refrigeration module, the control module is used for monitoring the temperature of the photovoltaic module, and when the temperature of the photovoltaic module is higher than a preset temperature, the refrigeration module is controlled to cool the photovoltaic module. The refrigeration module is integrated on the photovoltaic module, the refrigeration module is controlled through the control module, when the control module monitors that the temperature of the photovoltaic module is too high, the refrigeration module is controlled to be cold-started to cool the photovoltaic module, thermal management is carried out on the photovoltaic module in time, and the situation that the power generation efficiency is affected by the too high photovoltaic module is avoided; and the power generation efficiency and power generation capacity of the photovoltaic module are improved.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a photovoltaic power generation system. Background Art

[0002] As photovoltaic modules continue to perform photoelectric conversion, the temperature of the photovoltaic modules may rise, resulting in reduced power generation and output power, which will affect the photoelectric conversion efficiency of the photovoltaic modules.

[0003] When working, photovoltaic modules are exposed to the outdoors for a long time, making it difficult to monitor the temperature changes of the photovoltaic modules in real time and to cool down the photovoltaic modules in time when the temperature of the photovoltaic modules rises. Summary of the invention

[0004] Based on this, it is necessary to provide a photovoltaic power generation system to address the problem in the prior art that it is difficult to monitor the temperature changes of photovoltaic modules in real time and to cool down the photovoltaic modules in time when the temperature of the photovoltaic modules rises.

[0005] The present disclosure provides a photovoltaic power generation system, comprising:

[0006] Photovoltaic modules, including multiple cells connected in series;

[0007] A refrigeration module is provided at one side of the photovoltaic module and connected to the photovoltaic module, and the area ratio of the refrigeration module to the cell sheet of the photovoltaic module is 1:50-1:20;

[0008] The control module is connected to the photovoltaic assembly and the refrigeration module respectively. The control module is used to monitor the temperature of the photovoltaic assembly. When the temperature of the photovoltaic assembly is higher than a preset temperature, the refrigeration module is controlled to cool the photovoltaic assembly.

[0009] Optionally, the output side of the photovoltaic assembly is connected to the input side of the refrigeration module, and the input side of the photovoltaic assembly is connected to the output side of the refrigeration module;

[0010] The output side of the photovoltaic assembly is connected to the input side of the control module, and the input side of the photovoltaic assembly is connected to the output side of the control module;

[0011] The input side of the refrigeration module is connected to the input side of the control module, and the output side of the refrigeration module is connected to the output side of the control module.

[0012] Optionally, the control module includes:

[0013] A temperature detection unit connected to the photovoltaic module, the temperature detection unit is used to obtain the real-time temperature of the photovoltaic module;

[0014] A judgment unit connected to the temperature detection unit, the judgment unit is used to judge whether the real-time temperature of the photovoltaic module is higher than the preset temperature;

[0015] A control unit is connected to the judgment unit and the refrigeration module respectively, and the control unit is used to control the refrigeration module according to the judgment result of the judgment unit, and when the real-time temperature of the photovoltaic component is higher than the preset temperature, the refrigeration module is controlled to refrigerate to cool the photovoltaic component; when the real-time temperature of the photovoltaic component is lower than the preset temperature, the refrigeration module is controlled to stop refrigeration.

[0016] Optionally, there is a gap between the battery sheets, and the orthographic projection of the refrigeration module on the photovoltaic assembly overlaps with the gap;

[0017] Wherein, the gap includes staggered transverse gaps and longitudinal gaps; the refrigeration module includes a first refrigeration part extending in the transverse direction and a second refrigeration part extending in the longitudinal direction, the first refrigeration part and the second refrigeration part are connected to form a grid structure, the orthographic projection of the first refrigeration part on the photovoltaic component covers the transverse gap, and the orthographic projection of the second refrigeration part on the photovoltaic component covers the longitudinal gap.

[0018] Optionally, the refrigeration module further includes a connecting portion, which surrounds the grid structure and is arranged on the outside of the grid structure, and ends of the first refrigeration portion and the second refrigeration portion are connected to the connecting portion.

[0019] Optionally, at least a portion of the orthographic projection of the connection portion on the photovoltaic component is located in a frame of the photovoltaic component, and the connection portion is connected to the frame of the photovoltaic component.

[0020] Optionally, the refrigeration module comprises a refrigeration layer and a high reflection layer sequentially stacked on one side of the photovoltaic component, the refrigeration layer is used to cool the photovoltaic component, and the high reflection layer is used to reflect light to the battery cell.

[0021] Optionally, a surface of the high-reflection layer away from the photovoltaic module is a reflective surface, and a distance between the reflective surface and the photovoltaic module is 2.15 mm-2.4 mm;

[0022] And / or, the high reflective layer has a pyramid structure;

[0023] And / or, the high reflective layer is white.

[0024] Optionally, the refrigeration module is bonded to one side of the photovoltaic module by conductive adhesive;

[0025] The cooling layer is a semiconductor layer; the high reflection layer is a titanium oxide layer.

[0026] Optionally, it also includes:

[0027] A photovoltaic inverter, wherein the DC side of the photovoltaic inverter is connected to the output side of the photovoltaic module, and the AC side of the photovoltaic inverter is connected to the grid for output.

[0028] The photovoltaic power generation system disclosed in the present invention integrates a refrigeration module on the photovoltaic component, and controls the refrigeration module through the control module. When the control module detects that the temperature of the photovoltaic component is too high, the refrigeration module is controlled to cold start to cool the photovoltaic component, and the thermal management of the photovoltaic component is performed in time to avoid the photovoltaic component being too high and affecting the power generation efficiency, thereby improving the power generation efficiency and power generation of the photovoltaic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A connection diagram of a photovoltaic power generation system provided in an exemplary embodiment;

[0031] Figure 2 is a block diagram of a photovoltaic power generation system provided in an exemplary embodiment;

[0032] Figure 3 is a top view of a photovoltaic assembly provided in an exemplary embodiment;

[0033] Figure 4 A top view of a refrigeration module provided in an exemplary embodiment on a photovoltaic module;

[0034] Figure 5 A top view of a refrigeration module provided in another exemplary embodiment on a photovoltaic module;

[0035] Figure 6 A top view of a refrigeration module provided in yet another exemplary embodiment on a photovoltaic module;

[0036] Figure 7 In an exemplary embodiment, the Figure 6 Cross-section along line AA;

[0037] Figure 8 In another exemplary embodiment, a Figure 6 Cross-section along line AA;

[0038] Fig. 9A top view of a refrigeration module provided in yet another exemplary embodiment on a photovoltaic module;

[0039] Fig.10 In an exemplary embodiment, the Figure 4 Cross-section along line BB;

[0040] Fig.11 In another exemplary embodiment, a Figure 4 Cross-section along line BB;

[0041] Fig.12 In another exemplary embodiment, Figure 4 Cross-section along line BB.

[0042] Description of reference numerals:

[0043] 10. Photovoltaic module; 101. Power generation area; 102. Frame; 11. Solar cell; 12. Gap; 121. Horizontal gap; 122. Longitudinal gap; 20. Refrigeration module; 201. Refrigeration layer; 202. High reflection layer; 2021. Reflection surface; 21. First refrigeration part; 22. Second refrigeration part; 23. Connecting part; 231. First part; 232. Second part; 233. Bending part; 30. Control module; 31. Temperature detection unit; 32. Judgment unit; 33. Control unit; 40. Photovoltaic inverter; 50. Conductive adhesive. DETAILED DESCRIPTION

[0044] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0046] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0047] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that when the terms "consisting of" and / or "comprising" are used in this specification, the presence of the features, integers, steps, operations, elements and / or parts can be determined, but the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups is not excluded. At the same time, when used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0048] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0049] As described in the background art, photovoltaic modules are exposed outdoors for a long time during operation, and it is difficult to monitor the temperature changes of the photovoltaic modules in real time and to cool down the photovoltaic modules in time when the temperature of the photovoltaic modules rises.

[0050] In view of this, the present disclosure provides a photovoltaic power generation system, which controls the temperature of photovoltaic modules by integrating a refrigeration module and a control module, thereby realizing intelligent management of the temperature of photovoltaic modules, thereby improving the power generation efficiency and stability of the photovoltaic system, and effectively solving the problem of decreased power generation efficiency of photovoltaic modules in high temperature environments. At the same time, it improves the overall performance and stability of the system, and provides new ideas for the development of photovoltaic power generation technology.

[0051] According to an exemplary embodiment, the present disclosure provides a photovoltaic power generation system, such as Figure 1 , Figure 2 As shown, and refer to Figure 3-Figure 12The photovoltaic power generation system includes a photovoltaic module 10, a refrigeration module 20 and a control module 30; the photovoltaic module 10 includes a plurality of cells 11 connected in series; the refrigeration module 20 is arranged on one side of the photovoltaic module 10 and connected to the photovoltaic module 10, and the area ratio of the refrigeration module 20 to the cell 11 of the photovoltaic module 10 is 1:50-1:20; the control module 30 is connected to the photovoltaic module 10 and the refrigeration module 20 respectively, and the control module 30 is used to monitor the temperature of the photovoltaic module 10, and when the temperature of the photovoltaic module 10 is higher than the preset temperature, the refrigeration module 20 is controlled to cool the photovoltaic module 10.

[0052] Among them, the types of cells in the embodiment of the present application include but are not limited to Passivated Emitter Rear Cell (PERC), Tunnel Oxide Passivated Contact (TOPCON), Heterojunction with Intrinsic Thin-layer (HIT), Back Contact (BC), Perovskite Solar Cell (PSC), Multi-busbar (MBB) or Busbar-free (0BB), etc. In this embodiment, the types of cells in the photovoltaic module 10 are not specifically limited.

[0053] For BC cells, the emitter, surface field and metal electrode are all set on the back of the cell and cross-distributed. The front of the cell uses SiN x / SiO x The double-layer anti-reflection passivation film removes the metal electrode from the front of the battery, allowing the battery to receive more incident light, reducing optical losses and improving photoelectric conversion efficiency.

[0054] For TOPCon cells, along the thickness direction, TOPCon cells include metal silver electrodes, front surface silicon nitride passivation layers, boron-doped emitters, N-type base silicon layers, diffused doping layers, ultra-thin silicon oxide, doped polysilicon, silicon nitride, and metal silver electrodes. The back of the cell is composed of an ultra-thin silicon oxide layer (1nm~2nm) and a phosphorus-doped microcrystalline amorphous mixed Si film, which together form a passivation contact structure. This structure can block the recombination of minority carrier holes and increase the open circuit voltage and short circuit current of the cell. The ultra-thin oxide layer allows majority electrons to tunnel into the polysilicon layer while blocking the recombination of minority carrier holes. The good passivation effect of ultra-thin silicon oxide and heavily doped silicon film causes the energy band on the silicon wafer surface to bend, thereby forming a field passivation effect, greatly increasing the probability of electron tunneling, and reducing the contact resistance, which increases the open circuit voltage and short circuit current of the cell, thereby improving the cell conversion efficiency.

[0055] For HIT batteries, along their thickness direction, the HIT batteries include a front low-temperature silver electrode, a front conductive film, an N-type amorphous silicon film, an intrinsic amorphous silicon film, an N-type base silicon layer, an intrinsic amorphous silicon film, a P-type amorphous silicon film, a back conductive film, and a back low-temperature silver electrode.

[0056] For PERC cells, along the thickness direction, the PERC cell includes a front surface metal silver electrode, a front surface silicon nitride passivation layer, a phosphorus layer emitter, a P-type base silicon layer, a local aluminum back field, a metal aluminum back electrode, a back passivation layer (Al 2 O 3 / SiN x ). PERC cells use a passivation film to passivate the back side, replacing the all-aluminum back side field, enhancing the internal back reflection of light in the silicon substrate, reducing the recombination rate on the back side, and increasing the efficiency of the cell by 0.5%-1%.

[0057] For PSC cells, along the thickness direction, the perovskite cell includes substrate material, conductive film, electron transport layer (titanium dioxide), perovskite absorption layer (hole transport layer), and metal cathode. Perovskite materials have a high light absorption coefficient and a long carrier diffusion distance. After the photons absorbed by the perovskite material are converted into electrons, they are easily collected by the electrode with low loss, so they can generate higher photoelectric voltage and current, making the perovskite show a higher photoelectric conversion efficiency.

[0058] For multi-busbar technology batteries, the number of busbars is increased while the width of the busbars and fine grids is reduced. By increasing the number of busbars, the uniformity of battery stress distribution is improved, thereby improving conductivity and increasing conversion efficiency.

[0059] For busbar-free cells, low-temperature welding strips are used instead of busbars, and the welding strips are pre-fixed on the busbar-free solar cells to achieve low-temperature welding of the welding strips and cells during the component lamination process. While connecting multiple cells into a battery string, the welding strips replace the busbars to collect the current on the busbar-free cell fine grid, and the components will have higher power and better performance.

[0060] The photovoltaic module 10 may be a single-glass module or a double-glass module. When the photovoltaic module 10 is a single-glass module, the refrigeration module 20 is disposed on the back of the photovoltaic module 10. When the photovoltaic module 10 is a double-glass module, the refrigeration module 20 may be disposed on both the back and the front of the photovoltaic module 10 to enhance the refrigeration efficiency of the refrigeration module 20.

[0061] It can be understood that when the refrigeration module 20 is set on the back and front of the photovoltaic component 10, the orthographic projection formed by the back side of the refrigeration module 20 on the photovoltaic component 10 coincides with the orthographic projection formed by the front side of the refrigeration module 20 on the photovoltaic component 10, so as to ensure that the photovoltaic component 10 has a higher photoelectric conversion area.

[0062] The cell 11 of the photovoltaic module 10 is used for photoelectric conversion and power generation. The power generation process of the cell 11 generates heat, which causes the temperature of the photovoltaic module 10 to rise. The peak power temperature coefficient of the photovoltaic module 10 is approximately between -0.35 and 0.50% / °C, that is, as the temperature rises, the power generation of the photovoltaic module 10 decreases. In theory, for every 1°C increase in temperature, the power generation of the photovoltaic power station will decrease by about 0.50%.

[0063] The photovoltaic power generation system of this embodiment integrates a refrigeration module 20 on the photovoltaic component 10, and controls the refrigeration module 20 to cool through the control module 30. When the control module 30 detects that the temperature of the photovoltaic component 10 is too high, it controls the refrigeration module 20 to cold start to cool down the photovoltaic component 10, and timely performs thermal management on the photovoltaic component 10 to avoid excessively high temperature of the photovoltaic component 10 affecting the power generation efficiency, improve the power generation efficiency and power generation of the photovoltaic component 10, effectively solve the problem of reduced power generation efficiency of the photovoltaic component 10 in a high temperature environment, and at the same time improve the overall performance and stability of the photovoltaic power generation system.

[0064] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 As shown, the area ratio of the cooling module 20 to the cell 11 of the photovoltaic module 10 is between 1:50 and 1:20. For example, the area ratio of the cooling module 20 to the cell 11 of the photovoltaic module 10 can be 1:50, 1:45, 1:40, 1:35, 1:30, 1:25 or 1:20.

[0065] In this way, by reasonably setting the area ratio of the refrigeration module 20 and the battery cell 11, it is ensured that the refrigeration module 20 has a sufficient cooling effect and can efficiently cool the photovoltaic component 10. At the same time, it is avoided that the area of ​​the refrigeration module 20 is too large and the refrigeration module 20 blocks the battery cell 11, thereby ensuring that the battery cell 11 has a sufficiently large light-transmitting area for photoelectric conversion and ensuring that the photovoltaic component 10 has a high photoelectric conversion efficiency.

[0066] In some embodiments, reference Figure 1As shown, the output side of the photovoltaic component 10 is connected to the input side of the refrigeration module 20, and the input side of the photovoltaic component 10 is connected to the output side of the refrigeration module 20; the output side of the photovoltaic component 10 is connected to the input side of the control module 30, and the input side of the photovoltaic component 10 is connected to the output side of the control module 30; the input side of the refrigeration module 20 is connected to the input side of the control module 30, and the output side of the refrigeration module 20 is connected to the output side of the control module 30.

[0067] In this way, the control module 30 can accurately obtain the temperature information of the photovoltaic assembly 10 and control the start and stop of the refrigeration module 20 according to the temperature information of the photovoltaic assembly 10, thereby achieving precise management of the temperature of the photovoltaic assembly 10.

[0068] In some embodiments, reference Figure 2 As shown, the control module 30 includes:

[0069] The temperature detection unit 31 is connected to the photovoltaic module 10 and is used to obtain the real-time temperature of the photovoltaic module 10. The temperature detection unit 31 may be a temperature sensor, and the temperature detection unit 31 obtains the real-time temperature of the photovoltaic module 10 and sends the real-time temperature of the photovoltaic module 10 to the judgment unit 32. For example, the temperature detection unit 31 may be a thermistor, a thermal resistance sensor, or an infrared temperature sensor.

[0070] The judgment unit 32 is connected to the temperature detection unit 31, and is used to judge whether the real-time temperature of the photovoltaic component 10 is higher than the preset temperature; wherein the preset temperature is a pre-set temperature, and the preset temperature can be set by the control module 30 before the photovoltaic power generation system is put into operation. The preset temperature can be the optimal operating temperature of the photovoltaic component 10.

[0071] The control unit 33 is connected to the judgment unit 32 and the refrigeration module 20 respectively. The control unit 33 is used to control the refrigeration module 20 according to the judgment result of the judgment unit 32. When the real-time temperature of the photovoltaic component 10 is higher than the preset temperature, the refrigeration module 20 is controlled to refrigerate to cool the photovoltaic component 10. When the real-time temperature of the photovoltaic component 10 is lower than the preset temperature, the refrigeration module 20 is controlled to stop refrigeration.

[0072] The control unit 33 controls the refrigeration module 20 according to the judgment result of the judgment unit 32, and controls whether the refrigeration module 20 starts to adjust the temperature of the photovoltaic component 10 according to the real-time temperature of the photovoltaic component 10. When it is detected that the temperature of the photovoltaic component 10 is higher than the preset value, the control module 30 will start the refrigeration module 20 for cooling.

[0073] The temperature of the photovoltaic module 10 is controlled in real time, and the temperature of the photovoltaic module 10 is intelligently managed. When the temperature of the photovoltaic module 10 is higher than the preset value, the control module 30 will start the refrigeration module 20 to cool the photovoltaic module 10. When the temperature of the photovoltaic module 10 drops below the preset value, the refrigeration is stopped to keep the photovoltaic module 10 running at the optimal operating temperature.

[0074] The photovoltaic module 10 always operates at the optimal operating temperature. On the one hand, the photovoltaic power generation system maintains a high power generation efficiency, which is beneficial to improving the power generation of the photovoltaic power generation system and improving the overall performance and stability of the photovoltaic power generation system; on the other hand, it can prevent the photovoltaic module from overheating for a long time and affecting its working life, which is beneficial to extending the service life of the photovoltaic module 10.

[0075] In some embodiments, reference Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 As shown, there is a gap 12 between the battery cells 11, and the orthographic projection of the cooling module 20 on the photovoltaic module 10 overlaps with the gap 12; in this way, the cooling module 20 is set by making full use of the gap 12 between the battery cells 11, which can fully utilize the application area of ​​the photovoltaic module 10 and avoid the cooling module 20 from blocking the battery cells 11.

[0076] Among them, the gap 12 includes staggered transverse gaps 121 and longitudinal gaps 122; the refrigeration module 20 includes a first refrigeration part 21 extending in the transverse direction and a second refrigeration part 22 extending in the longitudinal direction, the first refrigeration part 21 and the second refrigeration part 22 are connected to form a grid structure, the orthographic projection of the first refrigeration part 21 on the photovoltaic component 10 covers the transverse gap 121, and the orthographic projection of the second refrigeration part 22 on the photovoltaic component 10 covers the longitudinal gap 122.

[0077] In this way, the refrigeration module 20 can be set up by fully utilizing the position occupied by the horizontal gap 121 and the longitudinal gap 122 to avoid the refrigeration module 20 from blocking the battery cell 11. On the other hand, the structural stability of the grid structure is higher, which is beneficial to improving the connection stability between the refrigeration module 20 and the photovoltaic module 10 and avoiding the refrigeration module 20 from falling off.

[0078] In one example, the orthographic projection of the first refrigeration portion 21 on the photovoltaic assembly 10 falls within the transverse gap 121 , and the orthographic projection of the second refrigeration portion 22 on the photovoltaic assembly 10 falls within the longitudinal gap 122 .

[0079] In another example, the orthographic projection of the first refrigeration portion 21 on the photovoltaic assembly 10 coincides with the transverse gap 121 , and the orthographic projection of the second refrigeration portion 22 on the photovoltaic assembly 10 coincides with the longitudinal gap 122 .

[0080] In another example, the orthographic projection formed by the first refrigeration unit 21 on the photovoltaic module 10 covers the transverse gap 121, and the outer contour of the orthographic projection formed by the first refrigeration unit 21 on the photovoltaic module 10 is located on the battery cell 11. The orthographic projection formed by the second refrigeration unit 22 on the photovoltaic module 10 covers the longitudinal gap 122, and the outer contour of the orthographic projection formed by the second refrigeration unit 22 on the photovoltaic module 10 is located on the battery cell 11. That is, part of the orthographic projections formed by the first refrigeration unit 21 and the second refrigeration unit 22 on the photovoltaic module 10 fall on the battery cell 11, which is conducive to further improving the refrigeration effect of the refrigeration module 20 and improving the cooling rate of the refrigeration module 20 on the photovoltaic module 10.

[0081] In some embodiments, reference Figure 5 , Figure 6 , Fig. 9 As shown, the refrigeration module 20 further includes a connecting portion 23 , which surrounds the grid structure and is disposed outside the grid structure. Ends of the first refrigeration portion 21 and the second refrigeration portion 22 are connected to the connecting portion 23 .

[0082] The photovoltaic power generation system is exposed to the outdoor environment during operation. The connecting portion 23 increases the connection area between the refrigeration module 20 and the photovoltaic assembly 10, enhances the connection strength between the refrigeration module 20 and the photovoltaic assembly 10, can further fix the refrigeration module 20 and prevent it from shifting, enhances the overall stability and reliability of the refrigeration module 20, prevents the refrigeration module 20 from shifting or being damaged due to environmental factors such as wind and sun, and helps to prevent the refrigeration module 20 from falling off the photovoltaic assembly 10.

[0083] In some embodiments, reference Figure 7 , Figure 8 or Fig.12 , the refrigeration module 20 is bonded to one side of the photovoltaic module 10 through the conductive adhesive 50. This installation method is simple and convenient for the installation, maintenance or replacement of the refrigeration module 20. In addition, the conductive adhesive 50 has good thermal conductivity and stability. The refrigeration module 20 and the photovoltaic module 10 can achieve a good heat conduction effect through the conductive adhesive 50. The refrigeration module 20 can absorb the heat of the photovoltaic module 10 to cool the photovoltaic module 10, thereby ensuring the temperature control efficiency of the photovoltaic module 10 in the photovoltaic power generation system.

[0084] In one example, referring to Figure 7The side of the connection part 23 close to the photovoltaic module 10 is bonded to the photovoltaic module 10 through the conductive adhesive 50, so that the refrigeration module 20 is firmly connected to the photovoltaic module 10. The first refrigeration part 21 and the second refrigeration part 22 are in direct contact with the photovoltaic module 10, so that when the refrigeration module 20 is refrigerating, the first refrigeration part 21 and the second refrigeration part 22 can quickly cool the photovoltaic module 10 to a temperature below the preset temperature.

[0085] In another example, referring to Figure 8 In order to increase the connection strength between the refrigeration module 20 and the photovoltaic module 10 , the connection part 23 , the first refrigeration part 21 , and the second refrigeration part 22 are all bonded to the photovoltaic module 10 by a conductive adhesive 50 .

[0086] In some embodiments, reference Figure 5 , Figure 6 , Fig. 9 As shown, at least part of the positive projection of the connection part 23 on the photovoltaic module 10 is located in the frame 102 of the photovoltaic module 10, and the connection part 23 is connected to the frame 102 of the photovoltaic module 10. That is, the connection part 23 can be partially or completely arranged on the frame 102 of the photovoltaic module 10 and connected to the frame 102 to enhance the stability of the overall structure. The design of the connection part 23 makes the refrigeration module 20 more stable, and at the same time, part of the connection part 23 is located in the frame 102 of the photovoltaic module 10, which is convenient for the installation, maintenance or replacement of the refrigeration module 20.

[0087] Reference Figure 3 As shown, the photovoltaic module 10 includes a power generation area 101 and a frame 102. A plurality of cells 11 are arranged in the power generation area 101. A gap 12 is provided between adjacent cells 11, and the peripheries of the plurality of cells 11 are spaced from the frame 102. In order to improve the stability of the photovoltaic module 10, the frame 102 is higher than the power generation area 101.

[0088] In one example, referring to Figure 6 , Figure 7 , Figure 8 As shown, the connection part 23 is arranged around the grid structure, and the connection part 23 includes a first part 231 arranged at the edge of the power generation area 101 and a second part 232 arranged on the frame 102. The first part 231 and the second part 232 of the connection part 23 are connected by a bending part 233. In this way, the connection strength between the connection part 23 and the photovoltaic module 10 is increased, and the connection stability between the cooling module 20 and the photovoltaic module 10 is improved.

[0089] In another example, referring to Fig. 9As shown, the connection part 23 is arranged on the frame 102 , the first refrigeration part 21 and the second refrigeration part 22 extend to the edge of the power generation area 101 , and the ends of the first refrigeration part 21 and the second refrigeration part 22 are bent upward to connect with the connection part 23 .

[0090] In some other embodiments, refer to Figure 8 As shown, the connection portion 23 may be disposed only at the edge of the power generation area 101; or, referring to Figure 4 As shown, the connecting portion 23 may not be provided, and the first refrigeration portion 21 and the second refrigeration portion 22 may be extended to the edge of the power generation area 101 , and the ends of the first refrigeration portion 21 and the second refrigeration portion 22 may be bent upward to the frame 102 and connected to the frame 102 .

[0091] In some embodiments, reference Fig.10 , Fig.11 or Fig.12 As shown, the refrigeration module 20 includes a refrigeration layer 201 and a high reflective layer 202 stacked in sequence on one side of the photovoltaic module 10. The refrigeration layer 201 is used to cool the photovoltaic module 10 to reduce its operating temperature, and reduce the photovoltaic module 10 to below a preset temperature so that the photovoltaic module 10 always maintains an optimal operating temperature; the high reflective layer 202 is used to reflect light to the battery cell 11 to improve the utilization rate of light energy.

[0092] The high reflective layer 202 can reflect the light irradiated to the gap 12 between the cells 11 to the cells 11, and the light is absorbed by the cells 11 and converted to photoelectricity, which is beneficial to improve the light energy utilization rate and photoelectric conversion rate of the photovoltaic module 10. The high reflective layer 202 can also reduce the absorption of heat to a certain extent, further reducing the temperature of the photovoltaic module 10.

[0093] At the same time, the design of the high reflective layer 202 not only improves the utilization rate of light energy, but also enhances the heat dissipation effect through reflection, further improving the overall performance of the system.

[0094] In some embodiments, reference Fig.10 , Fig.11 or Fig.12 As shown, the side surface of the high reflective layer 202 away from the photovoltaic module 10 is a reflective surface 2021, and the distance between the reflective surface 2021 and the photovoltaic module 10 is 2.15mm-2.4mm, so as to optimize the light reflection effect of the high reflective layer 202. For example, the distance between the reflective surface 2021 of the high reflective layer 202 and the photovoltaic module 10 can be 2.15mm, 2.2mm, 2.25mm, 2.3mm, 2.35mm, or 2.4mm.

[0095] The spacing between the reflective surface 2021 of the high reflective layer 202 and the photovoltaic module 10 is related to the thickness of the refrigeration module 20. The thicker the refrigeration module 20, the larger the spacing between the reflective surface 2021 of the high reflective layer 202 and the photovoltaic module 10. The reflective surface 2021 of the high reflective layer 202 can reflect more light to the battery cell 11. However, if the thickness of the refrigeration module 20 is too thick, it will also increase the weight of the refrigeration module 20 and reduce the connection strength between the refrigeration module 20 and the photovoltaic module 10.

[0096] In this embodiment, by reasonably setting the distance between the high-reflection layer 202 and the photovoltaic module 10, the distance between the reflective surface 2021 and the photovoltaic module 10 is 2.15mm-2.4mm, which can not only improve the light reflection effect of the high-reflection layer 202 and ensure that the light reflected by the high-reflection layer 202 can fall into the battery cell 11 and be absorbed by the battery cell 11, but also ensure that the overall weight of the refrigeration module 20 is reasonable, and the refrigeration module 20 can be firmly connected to the photovoltaic module 10.

[0097] In some embodiments, reference Fig.11 As shown, the high reflective layer 202 has a pyramid structure; in this way, the area of ​​the reflective surface 2021 of the high reflective layer 202 is increased, and the angle at which the high reflective layer 202 reflects light is optimized to optimize the light reflection effect, reflect more light to the battery cell 11 for photoelectric conversion, and improve the light energy utilization rate and photoelectric conversion rate of the photovoltaic component 10.

[0098] In some embodiments, reference Fig.10 , Fig.11 or Fig.12 As shown, the high reflective layer 202 is white. The white film layer has good light refraction to optimize the light reflection effect and reflect the light to the battery cell 11.

[0099] In some embodiments, reference Fig.10 , Fig.11 or Fig.12 As shown, the cooling layer 201 is a semiconductor layer, and the semiconductor layer has excellent cooling performance. For example, the semiconductor layer can achieve cooling by using the thermoelectric effect.

[0100] In some embodiments, the high reflective layer 202 is a titanium oxide layer.

[0101] Titanium oxide (TiO 2 ) is also known as titanium dioxide. Titanium oxide has good whiteness, hiding power, weather resistance, chemical stability and non-toxicity, and titanium oxide has high reflective properties.

[0102] The weather resistance of titanium oxide refers to the ability of titanium oxide to maintain its physical and chemical properties stable, not fading, not powdering, and not deteriorating under long-term effects of natural environmental conditions such as sunlight, rain, wind, temperature changes, etc. Due to its crystal structure and chemical stability, titanium oxide can effectively resist ultraviolet radiation, slow down the material aging process caused by ultraviolet radiation, and prevent titanium oxide from changing color and turning yellow due to ultraviolet radiation when exposed to outdoor environments, so that the high reflective layer 202 maintains high reflectivity to reflect light to the battery cell 11.

[0103] In some embodiments, reference Figure 1 As shown, the photovoltaic power generation system further includes a photovoltaic inverter 40, the DC side of the photovoltaic inverter 40 is connected to the output side of the photovoltaic module 10, and the AC side of the photovoltaic inverter 40 is connected to the grid and then output. The photovoltaic inverter 40 is used to connect the photovoltaic module 10 and the grid. The photovoltaic inverter 40 converts the DC power generated by the photovoltaic module 10 into AC power, and then connects to the grid and outputs it after meeting the grid connection requirements, ensuring the stable output and efficient use of electric energy, making the entire photovoltaic power generation system more complete and practical.

[0104] In summary, the photovoltaic power generation system provided by the present disclosure realizes intelligent temperature management and efficient thermal management of the photovoltaic module 10 by integrating the refrigeration module 20 and the control module 30. The photovoltaic power generation system can always be at the optimal operating temperature, can significantly improve the photoelectric conversion efficiency of the photovoltaic module 10, improve the power generation efficiency and power generation of the photovoltaic power generation system, improve the overall performance of the system, is conducive to reducing the operating cost of the photovoltaic power generation system, and prolonging the working life of the photovoltaic power generation system. It has broad application prospects and market value.

[0105] The photovoltaic power generation system provided by the present disclosure has the characteristics of efficient power generation, stability and reliability, and can be widely used in various scenarios, such as residential roofs, commercial buildings, industrial plants, etc.

[0106] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features of the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A photovoltaic power generation system, characterized in that: include: Photovoltaic modules, including multiple cells connected in series; A refrigeration module is provided at one side of the photovoltaic module and connected to the photovoltaic module, and the area ratio of the refrigeration module to the cell sheet of the photovoltaic module is 1:50-1:20; The control module is connected to the photovoltaic assembly and the refrigeration module respectively. The control module is used to monitor the temperature of the photovoltaic assembly. When the temperature of the photovoltaic assembly is higher than a preset temperature, the refrigeration module is controlled to cool the photovoltaic assembly.

2. The photovoltaic power generation system according to claim 1, characterized in that: The output side of the photovoltaic assembly is connected to the input side of the refrigeration module, and the input side of the photovoltaic assembly is connected to the output side of the refrigeration module; The output side of the photovoltaic assembly is connected to the input side of the control module, and the input side of the photovoltaic assembly is connected to the output side of the control module; The input side of the refrigeration module is connected to the input side of the control module, and the output side of the refrigeration module is connected to the output side of the control module.

3. The photovoltaic power generation system according to claim 1, characterized in that: The control module comprises: A temperature detection unit connected to the photovoltaic module, the temperature detection unit is used to obtain the real-time temperature of the photovoltaic module; A judgment unit connected to the temperature detection unit, the judgment unit is used to judge whether the real-time temperature of the photovoltaic module is higher than the preset temperature; A control unit is connected to the judgment unit and the refrigeration module respectively, and the control unit is used to control the refrigeration module according to the judgment result of the judgment unit, and when the real-time temperature of the photovoltaic component is higher than the preset temperature, the refrigeration module is controlled to refrigerate to cool the photovoltaic component; when the real-time temperature of the photovoltaic component is lower than the preset temperature, the refrigeration module is controlled to stop refrigeration.

4. The photovoltaic power generation system according to claim 1, characterized in that: There is a gap between the battery sheets, and the orthographic projection of the refrigeration module on the photovoltaic assembly overlaps with the gap; Wherein, the gap includes staggered transverse gaps and longitudinal gaps; the refrigeration module includes a first refrigeration part extending in the transverse direction and a second refrigeration part extending in the longitudinal direction, the first refrigeration part and the second refrigeration part are connected to form a grid structure, the orthographic projection of the first refrigeration part on the photovoltaic component covers the transverse gap, and the orthographic projection of the second refrigeration part on the photovoltaic component covers the longitudinal gap.

5. The photovoltaic power generation system according to claim 4, characterized in that: The refrigeration module further includes a connecting portion, which surrounds the grid structure and is arranged on the outside of the grid structure. Ends of the first refrigeration portion and the second refrigeration portion are connected to the connecting portion.

6. The photovoltaic power generation system according to claim 5, characterized in that: At least a portion of the orthographic projection of the connection portion on the photovoltaic component is located in the frame of the photovoltaic component, and the connection portion is connected to the frame of the photovoltaic component.

7. The photovoltaic power generation system according to claim 4, characterized in that: The refrigeration module comprises a refrigeration layer and a high reflection layer which are sequentially stacked on one side of the photovoltaic component, the refrigeration layer is used to cool the photovoltaic component, and the high reflection layer is used to reflect light to the battery sheet.

8. The photovoltaic power generation system according to claim 7, characterized in that: The surface of the high-reflection layer on one side away from the photovoltaic module is a reflective surface, and the distance between the reflective surface and the photovoltaic module is 2.15mm-2.4mm; And / or, the high reflective layer has a pyramid structure; And / or, the high reflective layer is white.

9. The photovoltaic power generation system according to claim 7, characterized in that: The refrigeration module is bonded to one side of the photovoltaic module by conductive adhesive; The cooling layer is a semiconductor layer; the high reflection layer is a titanium oxide layer.

10. The photovoltaic power generation system according to any one of claims 1 to 8, characterized in that: Also includes: A photovoltaic inverter, wherein the DC side of the photovoltaic inverter is connected to the output side of the photovoltaic module, and the AC side of the photovoltaic inverter is connected to the grid for output.

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