Energy conversion assembly and energy conversion system having the same

Abstract

An energy conversion assembly and an energy conversion system having the same are disclosed. The energy conversion assembly includes a light radiation collection unit and an energy conversion unit. The light radiation collection unit is configured to collect light radiation incident on a surface thereof such that the light radiation is concentrated on the energy conversion unit. The energy conversion unit is configured to convert the concentrated light radiation into electrical energy. An area of the energy conversion unit is related to a light collection index of the light radiation collection unit, and a location of concentration of the concentrated light radiation on the energy conversion unit varies over time.

Description

Technical Field

[0001] This application relates to the energy field, and in particular to an energy conversion component and an energy conversion system having the energy conversion component. Background Technology

[0002] Today, energy and carbon emissions have become increasingly important global concerns. Promoting and popularizing the use of clean energy, such as solar, wind, and hydropower, is crucial for environmental protection. Clean energy can be converted into electricity through energy conversion devices for production and daily life, without generating pollutants in the process. Therefore, the conversion efficiency and production cost of these devices are key considerations. Taking solar energy as an example, to reduce the cost of photovoltaic systems that convert solar energy into electricity, it is necessary to further improve the efficiency of photovoltaic modules and adopt low-cost and reliable components. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of this application is how to achieve normal or high conversion efficiency of the energy conversion system under the premise of low cost.

[0004] To address the aforementioned problems, this application discloses an energy conversion component, including a light radiation collection unit and an energy conversion unit. The light radiation collection unit is configured to collect light radiation incident on its surface, such that the light radiation is concentrated on the energy conversion unit. The energy conversion unit is configured to convert the concentrated light radiation into electrical energy. The area of ​​the energy conversion unit is related to the light collection index of the light radiation collection unit, and the concentration position of the concentrated light radiation on the energy conversion unit changes over time.

[0005] In one feasible implementation, the light radiation collection unit includes a focusing lens, the focusing power of which is lower than a preset threshold.

[0006] In one feasible implementation, the focusing lens includes a Fresnel lens.

[0007] In one feasible implementation, the energy conversion unit includes a battery cell, the side length of which is determined at least based on the focusing power and focal length of the focusing lens.

[0008] In one feasible implementation, during a first time period, the focal point of the concentrated light radiation on the solar cell changes over time and moves along the mounting direction of the long side of the solar cell.

[0009] In one feasible implementation, the long side is installed in a north-south longitudinal direction or an east-west transverse direction.

[0010] In one feasible implementation, the first time period may include one day or one year.

[0011] In one feasible implementation, the solar cell includes at least one of monocrystalline silicon cells, polycrystalline silicon cells, tandem cells, perovskite cells, and thin-film cells.

[0012] In one feasible implementation, the energy conversion component further includes an energy recovery unit configured to absorb the heat generated during the operation of the energy conversion unit.

[0013] Another aspect of this application discloses an energy conversion system, which includes one or more energy conversion components as described above.

[0014] In one feasible implementation, the energy conversion system further includes a motion component configured to cause light radiation to be incident on the surface of the energy collection component of the energy conversion component at a predetermined angle to the plane containing the surface of the light radiation collection component.

[0015] In one feasible implementation, the preset angle includes any angle between 66.5° and 113.5°.

[0016] In one feasible implementation, the motion component periodically adjusts the pose of the energy conversion system according to the incident angle of the light radiation, with a second time period as the cycle.

[0017] In one feasible implementation, the second time period is 1 day.

[0018] The energy conversion component disclosed in this application uses a light radiation collection unit to improve the energy conversion efficiency of the energy conversion unit. At the same time, while maintaining high energy conversion efficiency, the area of ​​the energy conversion unit is reduced, thus lowering production costs. Attached Figure Description

[0019] This application will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0020] Figure 1 These are exemplary structural schematic diagrams of energy conversion components shown in some embodiments of this application;

[0021] Figure 2 This is an exemplary optical analysis schematic diagram of light radiation focusing according to some embodiments of this application;

[0022] Figure 3AThis is an exemplary schematic diagram showing the change in the focal position of light radiation according to some embodiments of this application;

[0023] Figure 3B This is another exemplary schematic diagram showing the change in the focal position of light radiation according to some embodiments of this application;

[0024] Figure 4 The output power-voltage curves of the battery cell are shown in some embodiments of this application;

[0025] Figure 5 These are photoelectric conversion efficiency curves of the battery cells shown in some embodiments of this application;

[0026] Figure 6 These are current-voltage curves of a battery cell shown in some embodiments of this application;

[0027] Figure 7 This is a temperature distribution diagram of a battery cell shown according to some embodiments of this application; and

[0028] Figure 8 The curves showing the highest temperature variation of the battery cell are based on some embodiments of this application. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0031] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms “and / or” or “and / or” as used herein include any and all combinations of one or more of the associated listed items.

[0032] The following description, with reference to the accompanying drawings, illustrates some preferred embodiments of the present application. It should be noted that the following description is for illustrative purposes only and is not intended to limit the scope of protection of this application.

[0033] Figure 1 This is an exemplary schematic diagram of an energy conversion component according to some embodiments of this application. The energy conversion component can be used for at least photoelectric conversion, for example, converting light energy into electrical energy. The energy conversion component can also be used for photothermal conversion, for example, converting light energy into heat energy.

[0034] like Figure 1 As shown, the energy conversion component 100 may include a light radiation collection unit 110 and an energy conversion unit 120. The light radiation collection unit 110 may be disposed on the energy conversion unit 120 and configured to collect light radiation incident on its surface, so that the light radiation is concentrated on the energy conversion unit 120. The light radiation collection unit 110 may include a focusing lens, which can obtain different focusing magnifications by adjusting the distance between the focusing lens and the battery cell. For example, the focusing magnification may be 2x, 4x, 9x, 16x, 25x, 100x, 256x, etc. Optionally or preferably, the focusing magnification may be a low focusing magnification. In this case, the low focusing lens may refer to a lens with a focusing magnification lower than a preset threshold, wherein the preset threshold may be 25, 36, 49, 64, 81, 100, etc.

[0035] In some embodiments, the condensing lens may include a Fresnel lens. Referring to the examples above, the condensing lens may be a low-magnification Fresnel lens. In implementation, the Fresnel lens may be commercially available. For example, a Fresnel lens manufactured with fixed specifications and parameters. The Fresnel lens may also be custom-made. For example, specific serration widths and spacing between serrations to ensure uniform energy distribution of the focused light spot. In some embodiments, the Fresnel lens may be circular or square. Thus, the shape of the light radiation focused on the energy conversion unit 120 may also be circular or square.

[0036] The energy conversion unit 120 can be a component that converts one form of energy into another. In this application, the energy conversion unit 120 can be configured to convert concentrated light radiation into at least electrical energy. In this scenario, the energy conversion unit 120 can be a photovoltaic cell, for example, a photovoltaic cell.

[0037] In related technologies, energy conversion components can directly convert received energy. In contrast, the energy conversion component 100 of the present application can concentrate light radiation using a light radiation collection unit 110 (e.g., a Fresnel lens) before performing energy conversion. Therefore, the required size of the energy conversion unit 120 (e.g., a battery cell) is smaller than that of the energy conversion components in related technologies.

[0038] In some embodiments, the area of ​​the energy conversion unit 120 is related to the light collection index of the light radiation collection unit 110. For example, when the light radiation collection unit 110 is a condenser lens, the size of the energy conversion unit 120 (e.g., the area of ​​the solar cell) can be related at least to the condenser lens's focusing power and focal length. This can save on the manufacturing cost of the energy conversion unit 120.

[0039] Furthermore, since the sun's position varies at different times, the incident angle of light radiation on the surface of the light radiation collection unit 110 changes over time. In practice, the concentration position of the light radiation collected by the light radiation collection unit 110 on the energy conversion unit 120 changes over time. Simply put, when the incident angle of light radiation changes over time, the concentration position of the collected light radiation can move along a specific direction. For example, within a day, the sun rises in the east and sets in the west. The incident direction of the light radiation will change with the sun's position, and the corresponding incident angle will also change; similarly, the concentration position of the collected light radiation will move along the east-west direction. As another example, within a year, the angle at which light radiation strikes a fixed location on Earth changes with the date, with extreme values ​​occurring on the winter and summer solstices. The concentration position of the collected light radiation will move along the north-south direction. In other words, the change in the incident angle of light radiation causes a change in the concentration position.

[0040] See Figure 2 , Figure 2 This is an exemplary optical analysis diagram illustrating light radiation focusing according to some embodiments of this application. For example... Figure 2 As shown, P1P2 is the effective collecting surface of the light radiation collecting unit 110, and O is the center of the effective collecting surface. When the light radiation collecting unit 110 is a condensing lens, O is the optical center of the condensing component, and F is the focal point. When sunlight passes perpendicularly through P1P2 and is focused, the focused sunlight forms a light spot AB on the energy conversion unit 120. When the incident angle of sunlight changes, it is incident at an angle θ on P1P2 and focused, and the focused sunlight forms a light spot A'B' on the energy conversion unit 120. The position of the light spot will shift upward. Furthermore, the degree of upward shift is related to the size of the angle θ and the performance of the light radiation collecting unit 110 (e.g., the focusing power of the condensing lens, the focal length).

[0041] In some embodiments, the energy conversion unit 120 may include a solar cell. The solar cell may be elongated or rectangular. Alternatively, the solar cell may be rectangular. To ensure that light radiation at any time and at any angle of incidence is focused onto the solar cell while simultaneously reducing costs, the size of the solar cell may be modified.

[0042] As an example, assuming the effective collecting surface of the light radiation collecting unit 110 is vertically oriented, the incident angle θ of the light radiation can vary between 0° and 180° throughout the day. In this case, the light spot AB moves in accordance with the change in the incident angle θ. The moving distance can be the same as the length of the effective collecting surface of the light radiation collecting unit 110, and the moving direction is the same as the direction of change of the sun's position, which is east-west.

[0043] In another scenario, assume the energy conversion component 100 is movable, capable of adjusting its position according to the incident angle of the light radiation so that the light radiation is incident approximately perpendicularly onto the surface of the light radiation collection unit 110. For example, the energy conversion component 100 is connected to a single-axis optical tracking system, which can track the sun's position throughout the day. Thus, the position of the light spot AB will not move within a day. The solar cell only needs to have the same size as the light spot AB. Considering a period of one year, the angle of incidence will deviate due to the Earth's rotation / revolution. (Continue to refer to...) Figure 2 The deviation angle can be 2θ, where θ is approximately 23.5°. Therefore, the distance the light spot AB moves along the north-south direction within a year can also be related to θ. For example, a single-axis optical tracking system can cause light radiation to be incident on the surface of the light radiation collecting component at a preset angle to the plane containing the surface of the light radiation collecting component. The preset angle ranges from 66.5° to 113.5°, meaning the preset angle can be any angle between 66.5° and 113.5°. Figure 2 As shown, the incident angle of the incident light radiation varies within the range of angles formed by 2θ.

[0044] In some embodiments, the side length of the solar cell can be determined at least based on the focusing magnification and focal length of the condensing lens. In conjunction with the above description and Figure 2 The side length of one side of the solar cell can be the same as the length of the effective collection surface of the light radiation collection unit 110 (e.g., the side length of a square Fresnel lens or the diameter of a circular Fresnel lens). In this case, the energy conversion component 100 is fixed. The side length of one side of a rectangular solar cell can also be the length of the light spot AB. In this case, the energy conversion component 100 is movable. See the following description for details. Assuming the length of the condensing lens P1P2 is p and the condensation factor is X, then the length a of the light spot AB can be... The length of the other side of the rectangular solar cell can be the same as the distance the light spot AB moves in the north-south direction. Assuming the focal length of the condenser lens P1P2 is f, the distance b that the light spot AB moves can be...

[0045] refer to Figure 3A and Figure 3B , Figure 3A This is an exemplary schematic diagram illustrating the change in the focal position of light radiation according to some embodiments of this application. Figure 3B This is another exemplary schematic diagram illustrating the change in the focal position of light radiation according to some embodiments of this application. Figure 3A This illustrates the movement of concentrated light radiation across the solar cells when the energy conversion component is in a fixed 100° state. Figure 3A As shown, N indicates the north direction indicated by the arrow. The rectangular solar cell can be installed with its long side in the east-west direction and its short side in the north-south direction. The length of the long side of the rectangular solar cell can be the same as the length of the effective collection surface of the light radiation collection unit 110. Within a day, the concentrated light radiation on the solar cell is located at the point of concentration (i.e., the position of the light spot). Figure 3A (Represented by a square shaded area) can move along the east-west direction. That is, the concentrated light radiation can move along the long side of the rectangular solar cell. Within a year, considering only the same moment on each day, the concentration position of the concentrated light radiation on the solar cell can move along the north-south direction. That is, the concentrated light radiation can move along the short side of the rectangular solar cell.

[0046] Figure 3B This illustrates the movement of concentrated light radiation on the solar cell when the energy conversion component 100 can track the incident angle of the light radiation. For example... Figure 3B As shown, N indicates the north direction indicated by the arrow. The rectangular solar cell can be installed with its short side in the east-west direction and its long side in the north-south direction. Throughout the day, because the energy conversion component 100 can track the incident angle of light radiation, causing the light radiation to strike the surface of the energy collection component perpendicularly or approximately perpendicularly, the concentrated light radiation on the solar cell (i.e., the location of the light spot) is determined. Figure 3B (Represented by a square shaded area) remains unchanged. Within a year, the location of the concentrated light radiation on the solar cell can shift along the north-south direction. That is, the concentrated light radiation can shift along the mounting direction of the long side of the rectangular solar cell. In any case, within the first time period, the location of the concentrated light radiation on the solar cell shifts along the mounting direction of the long side of the solar cell over time. The first time period can be one day or one year.

[0047] In some embodiments, the solar cell may include at least one of monocrystalline silicon solar cells, polycrystalline silicon solar cells, tandem solar cells, perovskite solar cells, and thin-film solar cells. For example, the solar cell may be a tandem solar cell, employing a double-junction tandem solar cell structure or a multi-junction tandem solar cell structure.

[0048] In some embodiments, the energy conversion unit 120 may further include a heat collection plate. The heat collection plate may have the same properties as the solar cell, such as the same size, the same mounting characteristics, etc. For related information, please refer to the above description of the solar cell.

[0049] In some embodiments, the energy conversion assembly 100 may further include an energy recovery unit 130. The energy recovery unit 130 may be configured to absorb the heat generated during operation of the energy conversion unit. As an example, the energy recovery unit 130 may include a heat sink. This heat sink may be disposed below the energy conversion unit 120 to absorb the heat generated by the energy conversion unit 120 during photoelectric conversion under direct sunlight, preventing the energy conversion unit 120 from overheating. The energy recovery unit 130 may also include other auxiliary heat dissipation devices, such as coolant pipes. The coolant pipes may be arranged in a serpentine or spiral manner below the heat sink, and coolant such as water or ethanol flows through the pipes. This can be used to absorb some of the heat. As another example, the energy recovery unit 130 may include an auxiliary collector. This auxiliary collector plate may be disposed below the energy conversion unit 120 to absorb the heat dissipated by the energy conversion unit 120 during photothermal conversion under direct sunlight, improving the conversion efficiency of the energy conversion assembly 100.

[0050] The energy conversion component disclosed in this application utilizes focused light radiation to increase the size of the energy conversion unit and reduce costs. Simultaneously, the energy conversion unit can still fully receive focused light radiation without using a light radiation tracking system or a stable, reliable, and low-cost single-axis light tracking system, without affecting the operating efficiency of the energy conversion unit.

[0051] This application discloses an energy conversion system in some embodiments. The energy conversion system may include one or more energy conversion components as described above. For example, multiple energy conversion components may be arranged in a planar array in a certain order to form the energy conversion system. Each energy conversion component can receive light radiation and perform energy conversion independently without affecting other energy conversion components. In some embodiments, the energy conversion system may further include a motion component. The motion component may be configured to cause light radiation to be incident perpendicularly or approximately perpendicularly on the surface of the energy harvesting component of the energy conversion component.

[0052] In some embodiments, the motion component can be a single-axis optical tracking component. It is known that receiving incident light radiation perpendicularly or approximately perpendicularly is beneficial for improving energy conversion efficiency. The motion component can adjust the position of the energy conversion component according to the incident angle of the light radiation. The motion component can cause the light radiation to be incident on the surface of the light radiation collecting component at a preset angle to the plane containing the surface of the light radiation collecting component. The preset angle range includes any angle between 66.5° and 113.5°. In this way, the light radiation can be incident on the surface of the energy conversion component approximately perpendicularly, improving energy conversion efficiency. In some embodiments, the motion component periodically adjusts the pose of the energy conversion system according to the incident angle of the light radiation, with a second time period as the cycle. The second time period can be one day. As an example, assume that the initial pose of the energy conversion system is horizontal, that is, the planar array composed of multiple energy conversion components is parallel to the horizontal plane. The sun's trajectory within a day is from east to west. The initial incident angle of the light radiation can be 0°, which is parallel to the initial pose of the energy conversion system. At this time, the motion component can adjust the pose of the energy conversion system to a vertical orientation perpendicular to the horizontal plane. At this point, the light radiation will enter the energy conversion component perpendicularly. As time progresses, the incident angle of the light radiation will increase, assuming it to be 45°. The motion component can then adjust the pose of the energy conversion system to an oblique position at a 45° angle to the horizontal plane. When the incident angle of the light radiation becomes 90°, the motion component can then reposition the energy conversion system back to a horizontal position. When the motion component adjusts the pose of the energy conversion system back to a vertical position perpendicular to the horizontal plane, the incident angle of the light radiation can be 180°.

[0053] The energy conversion component disclosed in this application utilizes a low-cost energy conversion component while employing a stable, reliable, and low-cost motion component, thereby ensuring the energy conversion efficiency of the energy conversion component.

[0054] The technical solution of this application will be further described below through specific embodiments. It should be noted that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the claimed protection.

[0055] Example 1 - Photoelectric Conversion Analysis 1

[0056] Concentrating lenses with the same focal length but different focusing magnifications were used to fit solar cells of different sizes. The relationship between different focusing magnifications and solar cell size is shown in Table 1. The electrical properties of each solar cell during photoelectric conversion under the same incident light intensity I0 were measured, including voltage V, current I, and maximum output power P. The photoelectric conversion efficiency of the solar cells was also determined. The photoelectric conversion efficiency η = P / I0. Curve fitting was performed, and the results are shown below. Figures 4-6 As shown.

[0057] Table 1. Relationship between different concentration ratios, cell length, and photoelectric conversion efficiency.

[0058]

[0059]

[0060] Where P1P2 represents the effective length of the condenser lens, for example, the side length of a square condenser lens or the diameter of a circular condenser lens. As shown in Table 1, as the focusing power of the condenser lens increases, the size of the solar cell will decrease, and the photoelectric conversion efficiency will increase. Figure 4 The output power curves of the solar cells at different concentration ratios are shown. Figure 4 As shown, when the focusing power of the focusing lens increases, the open-circuit voltage of the solar cell increases, and the maximum output power increases. Figure 5 The photoelectric conversion efficiency of the solar cell at different concentration ratios is shown. For example... Figure 5 As shown, the photoelectric conversion efficiency of the solar cell increases with the increase of the focusing power of the focusing lens. Figure 6 The current-voltage curves of the solar cell at different concentration ratios are shown. These curves can be used to analyze the power generation performance of the solar cell. Figure 6 As shown, the power generation performance of each solar cell is good, and the data is reliable.

[0061] Example 2 - Thermal Analysis

[0062] Sunlight passes through a concentrator and forms a concentrated spot on the solar cell, which in turn generates a photocurrent. Besides the portion of energy converted into electricity, the remaining energy is absorbed by the solar cell and converted into heat. Therefore, the solar cell needs to be cooled to prevent overheating and affecting the module's output power.

[0063] The light-gathering component is a square Fresnel lens with a side length of 156.5 mm and a focal length f of 78.25 mm; the heat dissipation component is a copper sheet measuring 156.5 mm × 156.5 mm × 1 mm, with air convection cooling set at 20 W / K·m. 2 The ambient temperature was 30℃. The temperature distribution of the solar cells was measured under different concentration ratios. The results are as follows: Figure 7 and Figure 8 As shown.

[0064] Figure 7 The temperature distribution of the solar cells under different concentration ratios is shown. Figure 8 The relationship between the maximum temperature of the solar cell and the concentration factor is shown for different concentration ratios. For example... Figure 7As shown, for the non-focused module structure, the temperature distribution of the solar cells is uniform at 68.26℃. As the concentration factor increases, the temperature at the focused spot rises accordingly. Simultaneously, the temperature difference within the solar cells also increases. Figure 8 This indicates that the maximum temperature of the solar cell is approximately linearly related to the logarithm of the light concentration factor, while the temperature difference of the solar cell also increases. To avoid excessively high cell temperature and excessive temperature difference, the light concentration factor of the light-concentrating lens used in this application is a low-magnification light concentration factor, not exceeding 100 times.

[0065] Example 3 - Performance Comparison Analysis of Energy Conversion Components with Different Structures

[0066] Under the same external conditions, the power generation of energy conversion components with different structures was measured in parallel.

[0067] Experimental group A used a square Fresnel lens with a side length of 156.5 mm and a focal length of 78.25 mm. The solar cell size was 156.5 mm × 85.14 mm, the focusing power was 25, and the heat dissipation copper plate size was 156.5 mm × 156.5 mm × 1 mm. A fixed bracket was used, with the long side of the solar cell oriented east-west and the short side north-south. The focused light spot moved daily along the long side (east-west direction) according to the changing position of the sun.

[0068] Experimental group B used a square Fresnel lens with a side length of 156.5 mm and a focal length of 78.25 mm. The solar cell size was 31.3 mm × 85.14 mm, with a focusing power of 25. The heat dissipation copper plate size was 156.5 mm × 156.5 mm × 1 mm. A single-axis tracking bracket was used, with the long side of the solar cell oriented north-south and the short side east-west. The tracking system rotated daily according to the changing position of the sun. The focused light spot moved along the long side (north-south) of the solar cell due to the changing position of the sun throughout the year.

[0069] The control group > does not use a concentrating component; the solar cells are 156.5mm × 156.5mm in size, and sunlight is evenly irradiated onto the solar cells. A fixed support is used.

[0070] The energy conversion components of experimental groups A, B, and the control group were simulated and tested on sunny days in four seasons at a certain location to obtain the daily power generation. The results are shown in Table 2. Compared to the control group, experimental group B showed an increase of approximately 13.58% in photoelectric conversion efficiency and approximately 14.24% in power generation. Experimental group A also showed an increase in power generation compared to the control group.

[0071] The energy conversion components disclosed in this application, whether or not they have moving components, have higher power generation compared to energy conversion components without focusing.

[0072] Table 2 Comparison of power generation of the three energy conversion components

[0073] Experimental Group A 37.34 34.00 24.26 19.15 Experimental Group B 40.94 37.29 26.64 21.03 control group 35.88 32.67 23.29 18.37

[0074] Example 4 - Cost Analysis of Energy Conversion Systems with Different Constructions

[0075] (1) Seventy-two energy conversion modules (i.e., 72 156.5mm × 156.5mm solar cells) with the same structure as the comparative group in Example 3 are packaged into an energy conversion system (e.g., a photovoltaic module), the module having an area of ​​approximately 2m². 2 The output power is approximately 414W, the cost of photovoltaic modules is approximately 1.6 yuan / W, and the construction cost of a photovoltaic power station is approximately 3.99 yuan / W. This is achieved under an average annual solar irradiance of 1200 kWh / m². 2 If this photovoltaic power station is built in the region, the annual power generation will be 281.88 kWh / m². 2 If the component can be used for 25 years, the cost per kilowatt-hour will be approximately 0.2158 yuan / kWh.

[0076] (2) Seventy-two energy conversion components with the same structure as experimental group B in Example 3 (i.e., 72 square Fresnel lenses of 156.5mm × 156.5mm, solar cells of 31.3mm × 85.14mm, and a copper heat dissipation plate of 156.5mm × 156.5mm × 1mm) were packaged into an energy conversion system (e.g., a photovoltaic module). The area of ​​the module was approximately 2m². 2 The output power is approximately 470W, the cost of this photovoltaic module is approximately 1.67 yuan / W, and the annual power generation of this module is approximately 321.34 kWh / m³. 2 If the component is usable for 25 years, assuming other costs remain the same, the cost per kilowatt-hour is 0.1977 yuan / kWh, representing a decrease of 8.39%.

[0077] The above embodiments demonstrate that the energy conversion components and energy conversion units disclosed in this application can improve energy conversion efficiency and reduce costs.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 application.

[0079] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An energy conversion component, characterized in that, include: Light radiation collection unit; as well as Energy conversion unit; The light radiation collection unit is configured to collect light radiation incident on its surface, such that the light radiation is concentrated on the energy conversion unit. The energy conversion unit is configured to convert focused light radiation into electrical energy; The area of ​​the energy conversion unit is related to the light collection index of the light radiation collection unit. The energy conversion unit includes a rectangular battery cell, the length of which is [missing information]. , , a represents the length of the light spot focused on the energy conversion unit, p represents the length of the light collection unit, X represents the focusing power of the light collection unit, and f represents the focal length of the light collection unit; the focusing position of the focused light radiation on the energy conversion unit changes over time.

2. The energy conversion component according to claim 1, characterized in that, The light radiation collection unit includes a focusing lens, and the focusing power of the focusing lens is lower than a preset threshold.

3. The energy conversion component according to claim 2, characterized in that, The focusing lens includes a Fresnel lens.

4. The energy conversion component according to claim 2, characterized in that, The side length of the solar cell is determined at least based on the focusing magnification and focal length of the focusing lens.

5. The energy conversion component according to claim 1 or 4, characterized in that, During the first time period, the location of the concentrated light radiation on the solar cell changes over time and moves along the mounting direction of the long side of the solar cell.

6. The energy conversion component according to claim 5, characterized in that, The long side is installed in a north-south longitudinal direction or an east-west transverse direction.

7. The energy conversion component according to claim 5, characterized in that, The first time period includes one day or one year.

8. The energy conversion component according to claim 4, characterized in that, The solar cells include at least one of monocrystalline silicon cells, polycrystalline silicon cells, tandem cells, perovskite cells, and thin-film cells.

9. The energy conversion component according to claim 1, characterized in that, It further includes an energy recovery unit configured to absorb the heat generated during the operation of the energy conversion unit.

10. An energy conversion system, characterized in that, The energy conversion system includes one or more energy conversion components as described in any one of claims 1-9.

11. The energy conversion system according to claim 10, characterized in that, The energy conversion system also includes a motion component configured to cause light radiation to be incident on the surface of the light radiation collection component at a predetermined angle to the plane containing the surface of the light radiation collection component.

12. The energy conversion system according to claim 11, characterized in that, The preset angle includes any angle between 66.5° and 113.5°.

13. The energy conversion system according to claim 11, characterized in that, With the second time period as the cycle, the motion component periodically adjusts the pose of the energy conversion system according to the incident angle of the light radiation.

14. The energy conversion system according to claim 13, characterized in that, The second time period is 1 day.

Images