Secondary concentrating receiver and groove type concentrating photovoltaic power generation equipment thereof

Abstract

The utility model discloses a secondary concentrating receiver and a groove type concentrating photovoltaic power generation device thereof, belonging to the field of photovoltaic technology, the cross section of a collecting pipe has two side surfaces, the angle of the two side surfaces is 45-89 degrees, solar cell modules are arranged on the two side surfaces, and the cross section comprises but not limited to a triangle, a parallelogram and a sector. The included angle between the first reflection mirror plate and the solar cell module is 116-126 degrees, the included angle between the second reflection mirror plate and the solar cell module 8 is 145-155 degrees, and the width of the solar cell module 8 is 2-5 cm. And under the condition of double-side receiving, the mounting error resistance is good, the light receiving of the battery assembly is more uniform, and the length of a single battery is greatly reduced and the production cost is reduced in the application of a large-scale groove-type condenser.

Description

Technical Field

[0001] The utility model relates to photovoltaic technology and is based on a secondary concentrator receiver and a trough concentrator photovoltaic power generation device. Background Art

[0002] Photovoltaics, that is, a photovoltaic power generation system, is a power generation system that uses the photovoltaic effect of solar cells to convert solar radiant energy into electrical energy. The energy of the photovoltaic power generation system comes from the inexhaustible and renewable solar energy, which is a clean, safe and renewable energy source. The photovoltaic power generation process does not pollute the environment or damage the ecology. Currently, the mainstream photovoltaic product is monocrystalline silicon. Compared with monocrystalline silicon, gallium arsenide batteries have a high photoelectric conversion efficiency, but the production cost is extremely high, making them not suitable for widespread installation in the ground market.

[0003] Concentration refers to converging light through a condenser to form a concentrated light beam. Using the concentration effect, sunlight can be concentrated, and solar cells are arranged at the light convergence point to reduce the usage of solar cells. Specifically, if you want to collect sunlight of 1 square meter, generally, photovoltaics need to use 1 square meter of solar cells; but with the concentration effect of the condenser, the light is concentrated in an area of 0.01 square meters. At this time, the concentration ratio is 100 times concentration, and only 0.01 square meters of solar cells are needed to complete the collection of light.

[0004] As Figure 1 shown, in the existing Chinese Patent No. 2024106381227 for a secondary concentrator receiver for trough concentrator photovoltaics and its trough concentrator photovoltaic power generation device, the solar cell module is installed closely against the outer wall of the collecting pipe. A reflecting mirror plate is installed on each side of the solar cell module in the length direction. The reflecting mirror plate has the same length as the solar cell module, and the included angle between the reflecting mirror plate and the solar cell module is 160 - 175°, and the width of the solar cell module is 2 - 5 cm.

[0005] The feature of Chinese Patent No. 2024106381227 is to use one surface for reception. When using this surface for reception, due to the solar light cone phenomenon, the width of the square spots reflected by points a and b of the mirror (the outermost end a and the innermost end b of the reflecting mirror in practical application) on the square pipe is inconsistent. As Figure 2 shown, the light spots on the pipe are uneven and inconsistent, and the brightness of the light spots shows a state of being large in the middle and small on both sides, presenting a normal distribution. In this state, the concentration multiples on the battery are non-uniform, which will cause the temperature in the middle of the battery to be too high. After the temperature in the middle is too high, the efficiency will decrease significantly. Utility Model Content

[0006] Aiming at the problems existing in the prior art, the utility model provides a secondary concentrator receiver and a trough concentrator photovoltaic power generation device, in which the battery module receives light more evenly and the production cost is reduced.

[0007] The present invention is implemented as follows. A secondary concentrator receiver includes a collecting tube, a solar cell module, a glass encapsulation tube, and a PCB board. The solar cell module is mounted closely against the outer wall of the collecting tube. The glass encapsulation tube is hermetically sleeved outside the collecting tube, the solar cell module, and the PCB board. A cooling liquid for collecting the additional heat generated by the solar cell flows through the collecting tube. The PCB board is fixed on the collecting tube to effectively conduct the heat on the solar cell module to the collecting tube and simultaneously complete the circuit connection of the solar cell. A first reflecting mirror plate and a second reflecting mirror plate are installed on both sides in the length direction of the solar cell module. The first reflecting mirror plate and the second reflecting mirror plate are the same length as the solar cell module. The cross-section of the collecting tube includes two inclined planes, and the included angle between the two planes is 40° - 90°. The solar cell modules are respectively installed on the two inclined planes. The included angle between the first reflecting mirror plate and the solar cell module is 116 - 126°, and the included angle between the second reflecting mirror plate and the solar cell module is 145 - 155°. The width of the solar cell module is 2 - 5 cm.

[0008] The width of the solar cell module is 2 cm, the included angle between the first reflecting mirror plate and the solar cell module is 121°, and the included angle between the second reflecting mirror plate and the solar cell module is 150°.

[0009] The first reflecting mirror plate and the second reflecting mirror plate are installed on the collecting tube through brackets.

[0010] The PCB board includes an aluminum-based PCB board, a copper-based PCB board, a ceramic-based PCB board, or an epoxy-based PCB board, and is fixed on the collecting tube by a connection method of soldering or stud fixing.

[0011] The glass encapsulation tube is evacuated, filled with an inert gas, or filled with air to isolate the air from the solar cell.

[0012] The cooling liquid is water, oil, or antifreeze.

[0013] The cooling liquid flowing through the inside of the collecting tube is led out through both ends of the glass encapsulation tube, and the total positive and negative poles of the PCB board are led out through both ends of the glass encapsulation tube.

[0014] The output of the PCB board includes two outputs, a positive pole and a negative pole, and includes multiple solar cells and their respective bypass diodes. The solar cells are arranged in a single string or in a combination of series, parallel, and series-parallel connections of multiple strings of solar cells; the positive and negative poles of the solar cell module are respectively located on the front and back of the battery. The back of the battery is welded to the pads of the PCB board by a connection method of soldering or conductive adhesive. The pads on the front of the battery lead out electricity through wire bonding, resistance welding, soldering, or a solder tape method; the positive and negative poles of each solar cell are connected in parallel with a diode, and the diode is a Schottky diode, an ideal diode, or a bypass diode, which is used to offset the light spot effect of this battery.

[0015] The first and second reflecting mirror plates are metal film reflectors or polished mirror surface metal reflectors.

[0016] A trough type concentrating photovoltaic power generation device uses a trough type concentrator with a parabolic model for primary concentration, and the receiver uses the above-mentioned secondary concentration receiver. The tip formed by the two inclined planes of the secondary concentration receiver faces the center side of the concentrator.

[0017] The advantages and technical effects of the present utility model are as follows: In the case of bilateral reception, it has good resistance to installation errors, the light received by the battery components is more uniform, and in the application of large-scale trough type concentrators, the length of a single battery is greatly reduced, reducing the production cost. Description of the Drawings

[0018] Figure 1 is a schematic diagram of a prior art trough type concentrating photovoltaic power generation device;

[0019] Figure 2 is a diagram of the situation of the plane receiving light spot caused by the prior art solar cone;

[0020] Figure 3 is a schematic structural diagram of the secondary concentration receiver provided by the present utility model;

[0021] Figure 4 is a light path diagram of the secondary concentration receiver provided by the present utility model;

[0022] Figure 5 is a schematic diagram of a single series circuit of the battery and bypass diode in the embodiment of the present utility model;

[0023] Figure 6 is a schematic diagram of the mixed connection circuit of the battery and bypass diode in the embodiment of the present utility model;

[0024] Figure 7 is an overall schematic diagram of the secondary concentration receiver in the embodiment of the present utility model;

[0025] Figure 8 is a diagram of the situation of the inclined plane receiving light spot caused by the solar cone of the present utility model;

[0026] Figure 9 is a schematic diagram of the trough type concentrating photovoltaic power generation device in the embodiment of the present utility model. Detailed Embodiments

[0027] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the following further details the present utility model in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] In the description of the creation of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the creation of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the creation of the present utility model.

[0029] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0030] Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the creation of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the creation of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the creation of the present utility model can be understood through specific circumstances.

[0032] The electrical devices, controllers, etc. described in the present utility model are all conventional settings, and the electrical connection methods are also conventional connections.

[0033] Such as Figure 3-7As shown in the figure, the secondary concentrator receiver of the present utility model includes a collection tube 10, a solar cell module 8, a glass encapsulation tube 1, and a PCB board. The solar cell module 8 is installed closely against the outer wall of the collection tube 10. The glass encapsulation tube 1 is sleeved outside the collection tube 10, the solar cell module 8, and the PCB board in a sealed manner. A cooling liquid for collecting the additional heat generated by the solar cell flows through the collection tube 10. The PCB board is fixed on the collection tube 10 to effectively conduct the heat on the solar cell module 8 to the collection tube 10 and complete the circuit connection of the solar cell at the same time. A first reflecting mirror plate 7 and a second reflecting mirror plate 11 are installed on both sides of the solar cell module 8 in the length direction. The first reflecting mirror plate 7 and the second reflecting mirror plate 11 are the same length as the solar cell module 8. Its characteristics are that the cross-section of the collection tube 10 includes two inclined planes, the included angle between the two planes is 40° to 90°, the solar cell modules 8 are respectively installed on the two inclined planes, the included angle between the first reflecting mirror plate 7 and the solar cell module 8 is 116 - 126°, the included angle between the second reflecting mirror plate 11 and the solar cell module 8 is 145 - 155°, and the width of the solar cell module 8 is 2 - 5 cm.

[0034] Preferably, the width of the solar cell module 8 is 2 cm, the included angle between the first reflecting mirror plate 7 and the solar cell module 8 is 121°, and the included angle between the second reflecting mirror plate 11 and the solar cell module 8 is 150°.

[0035] The first reflecting mirror plate 7 and the second reflecting mirror plate 11 are installed on the collection tube 10 through brackets.

[0036] The PCB board includes an aluminum-based PCB board, a copper-based PCB board, a ceramic-based PCB board, or an epoxy-based PCB board, and is fixed on the collection tube by a connection method of soldering or stud fixing.

[0037] The glass encapsulation tube 1 is evacuated or filled with an inert gas or filled with air to isolate the air from the solar cell.

[0038] The cooling liquid is water, oil, or antifreeze.

[0039] The cooling liquid flowing through the inside of the collection tube is led out through both ends of the glass encapsulation tube 1, and the total positive and negative electrodes of the PCB board are led out through both ends of the glass encapsulation tube 1.

[0040] The output of the PCB board includes two outputs, namely the positive electrode and the negative electrode, and includes multiple solar cells and their respective bypass diodes. The solar cells are arranged in a single string or in a mixed connection, parallel connection, or series-parallel combination of multiple strings of solar cells; the positive and negative poles of the solar cell module are located on the front and back of the battery respectively. The back of the battery is welded to the pad of the PCB board by means of soldering or conductive adhesive, and the front pad of the battery leads out electricity through wire bonding, resistance welding, soldering or solder tape. The positive and negative poles of each solar cell are connected in parallel with the diode. The diode is a Schottky diode, an ideal diode or a bypass diode, which is used to offset the light spot effect of this battery.

[0041] The first reflecting mirror plate 7 and the second reflecting mirror plate 11 are metal film reflectors or polished mirror surface metal reflectors.

[0042] The utility model further includes a trough-type concentrating photovoltaic power generation device. The primary concentrator uses a trough-type concentrator with a parabolic model, and the receiver adopts the above-mentioned secondary concentrator. The tip formed by the two inclined planes of the secondary concentrator faces the center side of the concentrator.

[0043] The above-mentioned solar cell modules are arranged on both sides, and the cross-section of the collecting pipe 10 includes, but is not limited to, a triangle, a parallelogram, and a sector.

[0044] Specifically, in this embodiment, the cross-section of the collecting pipe 10 is an equilateral triangle, the width of the solar cell module 8 is 2 cm, the included angle between the first reflecting mirror plate 7 and the solar cell module 8 is 121°, and the included angle between the second reflecting mirror plate 11 and the solar cell module 8 is 150°. The first reflecting mirror plate 7 and the second reflecting mirror plate 11 are installed on the triangular collecting pipe 10 through brackets 6 / 9.

[0045] The reflecting mirror plates 7 / 11 are metal film reflectors or polished mirror surface metal reflectors.

[0046] As Figure 8 shown, an angled surface is used for reception. Through the design of this surface, when this surface is tilted at 60°, the spot widths projected at positions a and b on the mirror are equal, at points a and b. Although the average concentration ratio has not changed, due to the increase in the concentration uniformity, the battery efficiency and service life are significantly improved. Since this spot does not have the characteristics of a normal distribution, it is impossible to reduce the battery usage area by increasing the secondary reflector in principle, and the theoretical light interception rate is 98.6%. However, due to the inaccuracy of the concentrator's light tracking, the spots at points a and b in the upper middle will shift. By adding a secondary reflector and optimizing the angle of the secondary reflector, even when the spot position shifts by 2 mrad, the spot can fall on the spot again through the secondary reflector, achieving a light interception rate of 72% under this error condition, reaching a higher utilization rate and accuracy.

[0047] In this embodiment, a triangular tube is adopted. Through simulation experiments and comparisons, on the premise of pursuing utilization rate and mirror precision, the performance of the triangular tube receiving light obliquely is better than that of the square tube receiving light flatly. Taking the ideal 5.77m trough mirror (focal length 1.71m) as an example, when both use batteries with a total width of 40mm (the triangular tube uses two groups of 20mm batteries), the interception rate of the triangular tube receiving light obliquely can reach 98.6%, while the flat receiving scheme proposed in Chinese Patent 2024106381227 is 90.0%. It can be seen that in the pursuit of high utilization rate, the triangular tube scheme has more advantages.

[0048] As Figure 9 shown, the trough concentrating photovoltaic power generation device of the present utility model uses a trough concentrator with a parabolic model for primary concentration, and the receiver adopts the above-mentioned secondary concentrator.

[0049] As Figure 4 shown, for the design principle of the secondary reflector, the left and right secondary reflectors respectively collect the light beams deviating from the center position on both sides. Through special angle design, the reflected light beams are reflected onto the solar cells. Among them, the included angle between the upper secondary reflector and the battery is 121° as the best angle, and the acceptable angle is 116 - 126°; the included angle between the lower secondary reflector and the battery is 150° as the best angle, and the acceptable angle is 145 - 155°. When the reflectivity of the secondary reflector is 90%, only a 2cm solar cell is needed to receive 90% of the sunlight. The concentration ratio is 5.77m / 4cm × 90% = 129.8 times, and the power generation efficiency of the battery in this case is 40%.

[0050] For the traditional scheme of using a 9cm battery to receive all the light, the concentration ratio is 64 times, and the power generation efficiency of the battery in this case is 37%. Currently, the cost of solar cells accounts for about 70% of the overall project cost. The scheme of the present utility model saves 55% of the battery cost, which is equivalent to saving 38.5% of the project cost, and can achieve a power generation effect of more than 98.6% × 40% ÷ 37% = 106%, having cost and performance advantages.

[0051] As Figure 9 shown, in this embodiment, by using the concentrating effect of the trough concentrator, the light is focused on the solar cells. The two sides of the collecting tube facing the trough concentrator are provided with solar cells, and the other side is not provided with solar cells. The material includes but is not limited to aluminum. A cooling liquid flows through the collecting tube, and this liquid includes but is not limited to liquids such as water, oil, and antifreeze, which plays a role in collecting the additional heat generated by the solar cells.

[0052] The PCB is soldered to the collector tube or fixed to the collector tube using studs to effectively transfer the heat from the solar cell to the collector tube and complete the circuit connection of the solar cell. The PCB output is a power output, including positive and negative outputs. The typical circuit diagram is as follows: Figure 5 As shown, it includes multiple solar cells and their corresponding bypass diodes. The circuit connection methods include but are not limited to single string arrangement of solar cells, as well as mixed connection, parallel connection, and series-parallel combination of multiple strings of solar cells, such as Figure 6 shown.

[0053] The positive and negative poles of a solar cell are located on the front and back of the cell, respectively. The back of the cell is soldered to a pad on the PCB via soldering or conductive adhesive, while the front pads are connected to the electricity via gold wire bonding, resistance welding, soldering, or ribbons. The positive and negative poles of each solar cell are connected in parallel with a diode, including but not limited to a Schottky diode, an ideal diode, or a bypass diode. This diode is used to offset the light spot effect of the cell. That is, in low light conditions, the corresponding diode conducts to prevent damage to the solar cell and reduce electrical loss. Solar cells include but are not limited to gallium arsenide solar cells and silicon cells.

[0054] The glass encapsulation tube encapsulates the collector, isolating the solar cells from air. Specific methods include, but are not limited to, vacuuming, filling with inert gas, or filling with air. Dehumidifiers and oxygen scavengers can be added to the encapsulation to reduce environmental impacts on the solar cells.

[0055] The entire circuit is encapsulated within a glass tube, isolating it from the outside world. However, the coolant flowing through the collection tube is led out through the ends of the glass tube, and the positive and negative electrodes of the aluminum PCB are also led out through the ends of the glass tube. These positive and negative electrodes can be connected to an inverter to power the grid and other electrical devices.

[0056] The secondary focusing device (reflector plates 7 / 11) is fixed inside the glass encapsulation tube, above the collection tube. With the overall solution of tilted side-receiving, the light intensity distribution is relatively uniform, falling within a 2cm position (5.77m aperture concentrator). Due to the limitations of solar focusing accuracy, a tracking error of 2mrad may occur. The secondary reflector design reflects the light caused by this error toward the solar cell assembly, thereby increasing the system's error tolerance.

[0057] like Figure 7As shown in the figure, the assembly of the secondary reflection mirror plate: First, place the triangular tube (collecting tube) on the assembly bracket at a certain height from the operating platform with the horizontal plane facing up. Fix the bolts at specific positions on the outer surface of the triangular tube by stud welding. Use a special positioning mechanism to achieve a bolt position accuracy of ±0.1 mm. Then, align the screw holes of the PCB board with the bolt sleeves and lock the elastic nuts to fasten them. Immediately afterwards, install the buckle on the horizontal side of the triangular tube, start wiring, arrange the sorted cables along the center, and then lock the buckle to fix the cables. After completing the above steps, install the special fixing bracket for the secondary reflection mirror (the bending angles of the brackets are 49 - 69°, the typical value should be 59°; 110 - 130°, the typical value should be 120°). The fixing bracket adheres to the inclined surfaces on both sides of the triangular tube and is fastened with locknuts. The reflection mirror coincides with the upper surface of the fixing bracket and the screw holes coincide. After confirmation, pass the bolts with flexible gaskets through the screw holes of the reflection mirror and the fixing bracket, and lock and clamp them with nuts. Finally, use a high-precision measuring tool to measure the key dimensions. After confirmation, push it into the glass tube for encapsulation.

[0058] The reflection mirror plate uses the reflection principle to change the direction of light, focus and collect light. It uses polished and coated glass or metal as the substrate. When the light beam irradiates on the surface, specular reflection occurs. The reflection occurs on the surface of the optical element. Different from the lens optical path, the light beam does not pass through the optical element, so there is no chromatic dispersion caused by the refractive index. The reflector cannot be replaced by ordinary glass because the surface of the reflector has a dielectric coating, which will increase the reflectivity. If ordinary glass is used, the reflectivity will be extremely low.

[0059] In the present utility model, when selecting a suitable reflector for application, many factors are considered, including reflectivity, stability of the coating, thermal expansion of the substrate, wavefront aberration, light scattering, and cost. The characteristics of the reflector depend on the optical coating, substrate, and surface quality. The coating determines the reflectivity and stability of the mirror and is the most critical component of the reflector. The reflector film is usually made of metal materials or dielectric materials. Since the metal film reflector is not sensitive to the incident angle and only needs to meet the geometric reflection conditions, a silver-coated reflector film is preferably used in the present utility model, including but not limited to materials such as polished mirror surface metal, reflector film, and glass reflector. The silver-coated reflector film has the advantages of a relatively high reflectivity greater than 95% in the visible and infrared bands, and a small polarization effect when the reflector is tilted. It also avoids the disadvantages of poor adhesion between the silver-coated film and the optical glass substrate, being easily affected by sulfides, and having a short service life by installing the fixing bracket and glass sealing tube. Also, because the metal film layer is relatively soft and easily damaged, it is fixed inside the glass encapsulation tube, which not only increases the service life but also reduces the maintenance cost. The obtained reflector can also be used in a very wide spectral range.

[0060] The secondary concentrator is composed of two groups of reflecting mirror plates. Through specular reflection, it can collect the unincident light paths in the boundary part and enter the battery surface. While increasing the interception rate, it also increases the concentration multiple. The secondary reflection design can correct the error effects generated in part of the primary reflection and increase the range of the solar incidence angle on the battery surface to enhance the light intensity on the battery surface. In addition, the secondary concentrator adopts a reflection design, and most of the light paths do not pass through the secondary reflection optical elements. Compared with the lens design, there is no chromatic aberration phenomenon, and the energy loss caused by lens reflection and absorption is greatly reduced.

[0061] Figure 9 It is a trough-type concentrating photovoltaic power generation device in which the primary concentrator of the present utility model uses a trough-type concentrator with a parabolic model.

[0062] Compared with Chinese Patent 2024106381227, since the light spot received on the plane shows a normal distribution, the brightness of the light spot is uneven and inconsistent, resulting in a decline in system performance and a decline in error resistance. If the implementation method of the present utility model is adopted, the solar cell is made narrower, the cost is lower, the utilization rate is higher, and the error resistance of 2 mrad is achieved, having great market prospects.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A secondary concentrator receiver, comprising a collecting tube (10), a solar cell assembly (8), a glass encapsulation tube (1) and a PCB board. The solar cell assembly (8) is mounted closely against the outer wall of the collecting tube (10). The glass encapsulation tube (1) is sleeved and sealed outside the collecting tube (10), the solar cell assembly (8) and the PCB board. A cooling liquid for collecting the additional heat generated by the solar cell flows through the collecting tube (10). The PCB board is fixed on the collecting tube (10) to effectively conduct the heat on the solar cell assembly (8) to the collecting tube (10), and at the same time complete the circuit connection of the solar cell. A first reflecting mirror plate (7) and a second reflecting mirror plate (11) are mounted on both sides in the length direction of the solar cell assembly (8). The first reflecting mirror plate (7) and the second reflecting mirror plate (11) are the same length as the solar cell assembly (8). It is characterized in that, The cross-section of the collecting pipe (10) includes two inclined planes, and the included angle between the two planes is 40° to 90°. Solar cell modules (8) are respectively installed on the two inclined planes. The included angle between the first reflecting mirror plate (7) and the solar cell module (8) is 116° to 126°, and the included angle between the second reflecting mirror plate (11) and the solar cell module (8) is 145° to 155°. The width of the solar cell module (8) is 2 to 5 cm.

2. The secondary concentrator receiver according to claim 1, characterized in that, The width of the solar cell module (8) is 2 cm, the included angle between the first reflecting mirror plate (7) and the solar cell module (8) is 121°, and the included angle between the second reflecting mirror plate (11) and the solar cell module (8) is 150°.

3. The secondary concentrator receiver according to claim 1, characterized in that, The first reflecting mirror plate (7) and the second reflecting mirror plate (11) are installed on the collecting pipe (10) through brackets.

4. The secondary concentrator receiver according to claim 1, wherein The PCB board includes an aluminum-based PCB board, a copper-based PCB board, a ceramic-based PCB board or an epoxy-based PCB board, and is fixed on the collecting pipe by a connection method of soldering or stud fixing.

5. The secondary concentrating receiver according to claim 1, characterized in that The glass encapsulation tube (1) is evacuated or filled with an inert gas or filled with air to isolate the air from the solar cell.

6. The secondary concentrating receiver according to claim 1, wherein The cooling liquid is water, oil or antifreeze.

7. The secondary concentrator receiver according to claim 1, characterized in that, The cooling liquid flowing through the inside of the collecting pipe is led out through both ends of the glass encapsulation tube (1), and the total positive and negative electrodes of the PCB board are led out through both ends of the glass encapsulation tube (1).

8. The secondary concentrator receiver according to claim 1, wherein, The output of the PCB board includes two outputs, positive and negative, and includes multiple solar cells and their respective bypass diodes. The solar cells are arranged in a single string or in a mixed connection, parallel connection and series-parallel combination of multiple strings of solar cells; the positive and negative poles of the solar cell module are respectively located on the front and back of the battery. The back of the battery is soldered to the pads of the PCB board by soldering or conductive adhesive, and the pads on the front of the battery lead out electricity by wire bonding, resistance welding, soldering or solder strip; the positive and negative poles of each solar cell are connected in parallel with the diode. The diode is a Schottky diode, an ideal diode or a bypass diode, which is used to offset the light spot effect of this battery.

9. The secondary concentrator receiver according to claim 1, wherein The first reflecting mirror plate (7) and the second reflecting mirror plate (11) are metal film reflectors or polished mirror surface metal reflectors.

10. A trough type concentrating photovoltaic power generation device, characterized in that, For primary concentration, a trough concentrator using a parabolic model is used, and the receiver adopts the secondary concentration receiver described in any one of claims 1-9. The tip formed by the two inclined planes of the secondary concentration receiver faces the center side of the concentrator.

Images