A high-efficiency concentrated photovoltaic power generation device

Abstract

The application relates to the technical field of photovoltaic power generation equipment, and discloses a high-efficiency light-concentrating photovoltaic power generation device which comprises a tracking frame, a base plate arranged at the top of the tracking frame, a light-concentrating mechanism arranged in the base plate, a plurality of compartments arranged in a rectangular array at the top of the base plate, a light-concentrating mirror arranged at the top of each compartment, an outer shell arranged on the side wall of the base plate, a movable cavity arranged in the outer shell, a sleeve arranged on the inner wall of the movable cavity, an extension rod arranged in the sleeve, a pre-pressing spring arranged at the top of the extension rod, a coil sleeved on the outer wall of the sleeve, a driving block arranged at the top of the extension rod, a driving rod arranged on the side of the movable cavity close to the base plate, and a plurality of horizontal rods arranged in a linear array on the side of the driving rod away from the driving block. The light-concentrating mechanism can concentrate the sunlight in the coverage range of each light-concentrating mirror on the surface of the corresponding photovoltaic sheet, thereby improving the power generation efficiency of the unit-area photovoltaic material.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation equipment technology, and in particular to a high-efficiency concentrated photovoltaic power generation device. Background Technology

[0002] Concentrated photovoltaic (CPV) power generation devices are power generation equipment that uses concentrating elements to focus sunlight from a large area onto a small area of ​​photovoltaic cells, thereby improving photoelectric conversion efficiency and reducing the amount of photovoltaic materials used. Its basic components include a tracking frame that tracks the sun's position, a substrate mounted on the tracking frame, and a concentrator lens fixedly connected to the top of the substrate. A photovoltaic cell is mounted at the focal point of the concentrator lens. The tracking frame adjusts the orientation of the substrate according to changes in the sun's position, ensuring that sunlight always enters the concentrator lens at a near-perpendicular angle. The concentrator lens refracts and concentrates the received sunlight onto the surface of the photovoltaic cell. Under the photovoltaic effect, the photovoltaic cell converts light energy into electrical energy. This type of device has been applied in space-constrained high-density power generation scenarios and photovoltaic power plants in cold regions. Some devices improve the utilization efficiency of the concentrated light by adding auxiliary heat dissipation structures or using multi-junction photovoltaic cells. The output power of the photovoltaic cell is positively correlated with the incident light intensity within a certain range. Under high-concentration conditions, the output current of the photovoltaic cell increases accordingly, and the proportion of series resistance loss in the output characteristics changes accordingly. The overall output characteristics of the system are comprehensively affected by the concentration factor, the temperature of the photovoltaic cell, and the degree of spectral matching.

[0003] Traditional photovoltaic power generation devices are widely used in the energy sector, but due to limitations in their structure and working principle, they often have some problems that cannot be ignored. In the actual operation of concentrated photovoltaic (CPV) power generation devices, sunlight is focused by a concentrator to form a high-energy-density spot that irradiates the surface of the photovoltaic cell. While the photovoltaic cell converts light energy of a specific wavelength into electrical energy, the light energy of other wavelengths and some unconverted energy are converted into heat energy, causing the temperature of the photovoltaic cell to rise rapidly in a short period of time. This temperature rise will cause changes in the carrier transport characteristics inside the photovoltaic cell, and the open-circuit voltage will decrease with the increase in temperature, resulting in a corresponding decrease in photoelectric conversion efficiency. At the same time, the photovoltaic cell will accelerate material aging and electrode contact degradation when operating at high temperatures for a long time, shortening the service life of the device. To address the above-mentioned temperature rise problem, existing devices usually use passive heat dissipation structures to reduce the temperature of the photovoltaic cell. However, the heat dissipation capacity of the heat dissipation structure is limited by external conditions such as ambient temperature and wind speed. It is difficult to effectively suppress the temperature rise of the photovoltaic cell under high ambient temperature or low wind speed conditions. If an active cooling method is used, it requires additional electrical energy consumption and increases system complexity and failure risk. When the concentration ratio is high, the heat received per unit area of ​​the photovoltaic cell further increases, limiting the applicability of both passive and active cooling methods. Summary of the Invention

[0004] Given the existing technical problems of rapid temperature rise of photovoltaic cells and significant decrease in photoelectric conversion efficiency under high concentration and high ambient temperature conditions, as well as the accelerated aging of devices due to long-term high-temperature operation, a high-efficiency concentrated photovoltaic power generation device is proposed.

[0005] Its purpose is to enable the concentrated photovoltaic device to achieve automatic heat dissipation protection when the photovoltaic cell is overheated, avoid high temperature damage, and maintain the stability of photoelectric conversion efficiency.

[0006] The technical solution of the present invention is a high-efficiency concentrated photovoltaic power generation device, including a tracking frame, a substrate disposed on the top of the tracking frame, and a concentrating mechanism disposed inside the substrate; The focusing mechanism includes several compartments arranged in a rectangular array on the top of the substrate, a focusing mirror disposed on the top of the compartment, a housing disposed on the side wall of the substrate, a movable cavity disposed inside the housing, a sleeve disposed on the inner wall of the movable cavity, a telescopic rod disposed inside the sleeve, a preload spring disposed on the top of the telescopic rod, a coil sleeved on the outer wall of the sleeve, a drive block disposed on the top of the telescopic rod, a drive rod disposed on the side of the movable cavity near the substrate, several crossbars arranged in a linear array on the side of the drive rod away from the drive block, a reset spring disposed on the end of the crossbar away from the drive rod, several grooves arranged in a linear array on the outer wall of the crossbars, a buffer unit disposed in the compartment near the corresponding crossbar, an auxiliary mirror disposed inside the buffer unit, a photovoltaic cell disposed at the bottom of the inner wall of the compartment, and a snap-action switch disposed at the bottom of the photovoltaic cell closest to the coil, with the two ends of the coil fixedly connected to the two terminals of the snap-action switch.

[0007] Furthermore, the drive block is triangular in shape, and an inclined block is provided near the drive rod, with the inclined block slidably connected to the drive block.

[0008] Furthermore, the inner wall of the substrate is provided with a number of deep holes in a linear array, and the inner wall of the deep holes is slidably connected to the corresponding crossbars.

[0009] Furthermore, the buffer unit includes a sliding sleeve disposed on the crossbar near the compartment, a slider disposed on the inner wall of the sliding sleeve, the inner wall of the sliding sleeve being slidably connected to the corresponding crossbar, the outer wall of the slider being slidably connected to the corresponding groove, a bracket disposed on the side of the sliding sleeve near the compartment, guide posts symmetrically disposed at both ends of the bracket, the top of the outer wall of the guide posts being slidably connected to the auxiliary mirror, and a lifting spring sleeved on the outer wall of the guide posts, the two ends of the lifting spring abutting against the bracket and the auxiliary mirror respectively.

[0010] Furthermore, a square groove is provided on the side of the compartment near the corresponding support, and the inner wall of the square groove is in contact with the support.

[0011] Furthermore, the condenser lens is a Fresnel lens, with its bottom surface being the effective surface, which is composed of several concentric rings, and the top surface of the auxiliary lens matches the effective surface of the condenser lens.

[0012] Furthermore, the sliding sleeve has a circular hole extending to the other end near the drive rod. The inner wall of the circular hole is fixedly connected to the slider, and the inner diameter of the circular hole matches the outer diameter of the crossbar.

[0013] Furthermore, connecting blocks are symmetrically arranged on both sides of the auxiliary mirror, and the inner wall of the connecting block is adaptively slidably connected to the outer wall of the guide post.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a concentrating mechanism, sunlight within the coverage area of ​​each concentrator can be refracted and focused onto the surface of the corresponding photovoltaic cell, allowing light energy to be concentrated on the smaller photovoltaic cell for photoelectric conversion. This improves the power generation efficiency of photovoltaic materials per unit area and reduces the total demand for photovoltaic materials in the device. At the same time, the snap-on switch in the concentrating mechanism monitors the temperature of the photovoltaic cell in real time. When the temperature of the photovoltaic cell rises to the calibrated temperature, the trigger coil is energized, causing the telescopic rod to extend and sequentially drive the drive block, drive rod, and crossbar to move, thereby moving the auxiliary mirror into the working position that cooperates with the concentrator, realizing automatic response under temperature rise conditions.

[0015] 2. By setting up a buffer unit, a buffer function can be provided to avoid and buffer the auxiliary mirror as it moves with the crossbar to abut against the condenser lens. The sliding sleeve in the buffer unit rotates under the drive of the crossbar and swings the bracket toward the condenser lens. The auxiliary mirror moves synchronously under the drive of the bracket. When the auxiliary mirror abuts against the condenser lens and the bracket continues to move, the lifting spring is compressed and stores force. The elastic deformation of the lifting spring absorbs the impact energy generated at the moment of contact between the auxiliary mirror and the condenser lens, avoiding damage between the auxiliary mirror and the condenser lens due to rigid contact. At the same time, the lifting spring applies elastic force to the auxiliary mirror under the compressed state, so that the top surface of the auxiliary mirror keeps in contact with the effective surface of the condenser lens, reducing the fit gap caused by vibration or assembly error.

[0016] 3. By setting an auxiliary mirror, when the photovoltaic cell temperature exceeds the rated temperature, it can move to a position that matches the effective surface of the concentrator. The matching relationship between the top surface of the auxiliary mirror and the effective surface of the concentrator counteracts the concentrating effect of the concentrator on the incident sunlight. This causes the light passing through the concentrator to be scattered after passing through the auxiliary mirror, no longer converging on the surface of the photovoltaic cell. As a result, heat is no longer concentrated on the photovoltaic cell, creating a window period for heat dissipation under continuous illumination of the photovoltaic cell. This reduces the heating rate of the photovoltaic cell. After the snap-on switch disconnects the coil circuit, the reset spring and preload spring drive all components to reset, allowing the device to resume concentrated power generation after the temperature drops. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a schematic diagram showing the connection between the substrate and the outer casing of the present invention; Figure 3 This is a schematic diagram of the condenser lens structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 5 This is a schematic diagram of the driving block structure of the present invention; Figure 6 This is a schematic diagram showing the relative positions of the snap-on switch and the photovoltaic cell in this invention; Figure 7 This is a schematic diagram of the crossbar structure of the present invention; Figure 8 This is a schematic diagram of the auxiliary mirror of the present invention unfolding. Figure 9 This is a schematic diagram of the connection between the crossbar and the sliding sleeve of the present invention; Figure 10 This is a schematic diagram of the connection between the bracket and the sliding sleeve of the present invention; Figure 11 This is a schematic diagram showing the connection between the auxiliary mirror and the guide post of the present invention; Figure 12 This is a schematic diagram of the shrinkage of the auxiliary mirror of the present invention.

[0018] In the picture: 1. Tracking frame; 2. Substrate; 3. Concentrating mechanism; 31. Compartment; 32. Concentrating lens; 33. Housing; 34. Movable cavity; 35. Sleeve; 36. Telescopic rod; 37. Preload spring; 38. Coil; 39. Drive block; 310. Drive rod; 311. Crossbar; 312. Return spring; 313. Slide groove; 314. Auxiliary mirror; 315. Photovoltaic cell; 316. Trigger switch; 317. Sliding sleeve; 318. Slider; 319. Bracket; 320. Guide post; 321. Lifting spring. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Example 1, referring to Figures 1-12This invention provides a first embodiment of a high-efficiency concentrated photovoltaic power generation device, comprising a tracking frame 1, a substrate 2 fixedly connected to the top of the tracking frame 1, and a concentrating mechanism 3 assembled inside the substrate 2. The concentrating mechanism 3 includes a plurality of compartments 31 arranged in a rectangular array on the top of the substrate 2, a concentrating mirror 32 fixedly connected to the top of the compartments 31, a housing 33 fixedly connected to the side wall of the substrate 2, a movable cavity 34 opened inside the housing 33, a sleeve 35 fixedly connected to the inner wall of the movable cavity 34, a telescopic rod 36 slidably connected inside the sleeve 35, a preload spring 37 abutting the top of the telescopic rod 36, a coil 38 sleeved on the outer wall of the sleeve 35, and a drive block fixedly connected to the top of the telescopic rod 36. 39, a drive rod 310 slidably connected to the side of the movable cavity 34 near the substrate 2, several crossbars 311 fixedly connected in a linear array to the side of the drive rod 310 away from the drive block 39, a return spring 312 abutting against the end of the crossbar 311 away from the drive rod 310, several grooves 313 in a linear array opened on the outer wall of the crossbar 311, a buffer unit assembled in the compartment 31 near the corresponding crossbar 311, an auxiliary mirror 314 slidably connected to the inner side of the buffer unit, a photovoltaic cell 315 fixedly connected to the bottom of the inner wall of the compartment 31, and a snap switch 316 fixedly connected to the bottom of the photovoltaic cell 315 closest to the coil 38, and the two ends of the coil 38 are fixedly connected to the two terminals of the snap switch 316.

[0021] Specifically, when coil 38 is connected to the power supply, and sunlight shines through and passes through condenser lens 32, the light is refracted and focused by condenser lens 32, and its focal point shines on the photovoltaic cell 315 corresponding to condenser lens 32. After being irradiated, photovoltaic cell 315 generates electricity under the photovoltaic effect. Since photovoltaic cell 315 can only convert light of a specific wavelength into electrical energy, some of the remaining light will be converted into heat energy, causing the temperature of photovoltaic cell 315 to rise rapidly, affecting the power generation efficiency. When the temperature is lower than the rated temperature of trip switch 316, it is in the open state. When photovoltaic cell 315... When the temperature rises to the rated temperature of the snap-on switch 316, the snap-on switch 316 will be triggered, closing and energizing the coil 38. When the coil 38 is energized, the current flowing through the winding of the coil 38 at the sleeve 35 generates a magnetic field, causing the telescopic rod 36 to extend from the sleeve 35. Simultaneously, the telescopic rod 36 moves, storing force in the preload spring 37, and the telescopic rod 36 drives the drive block 39 to move synchronously. As the drive block 39 moves, it presses against the drive rod 310, causing the drive rod 310 to move closer to the substrate 2. The movement of the drive rod 310... The movement of the crossbars 311 causes several crossbars 311 to move synchronously. As the crossbars 311 move, they press against the corresponding sliders 318 via the grooves 313, causing the return springs 312 to store force. The sliders 318 transmit the force to the sliding sleeves 317. Due to the constraint of the deep holes on the substrate 2, the sliding sleeves 317 can only rotate around their own axis. Simultaneously, the sliding sleeves 317 drive the bracket 319 to rotate synchronously. The bracket 319, through the guide post 320, causes the auxiliary mirror 314 to swing upwards. When the auxiliary mirror 314 swings to its maximum angle, its top surface aligns with the condenser lens 32. The bottom surface is designed to scatter light when it passes through the auxiliary mirror 314, preventing it from focusing on the photovoltaic cell 315. After the light is scattered, the heat is no longer concentrated on the photovoltaic cell 315, allowing the photovoltaic cell 315 to have a heat dissipation window. This prevents the heating rate from exceeding the heat dissipation rate and causing damage, and also prevents the temperature from being too high and affecting the photoelectric conversion efficiency. When the temperature drops to a safe range, the snap switch 316 disconnects the circuit of the coil 38, the magnetic field at the winding of the coil 38 disappears, the reset spring 312 resets the crossbar 311 and the drive rod 310, and the preload spring 37 resets the telescopic rod 36.

[0022] Reference Figures 4-7 The drive block 39 is triangular in shape, and the drive rod 310 is provided with an inclined block near the drive block 39. The inclined block is slidably connected to the drive block 39.

[0023] Specifically, while moving, the drive block 39 presses against the inclined plate on the inclined block, converting the upward force of the drive block 39 into a force that pushes the drive rod 310 to move towards the substrate 2.

[0024] Reference Figure 8 and Figure 9The inner wall of the substrate 2 has several deep holes arranged in a linear array, and the inner wall of the deep holes is slidably connected to the corresponding crossbar 311.

[0025] Specifically, the base plate 2 accommodates the crossbar 311 and the return spring 312 through a deep hole, and the deep hole is connected to the square groove on the inner wall of the compartment 31. The deep hole constrains the motion degree of freedom of the sliding sleeve 317 through the connection with the square groove.

[0026] Example 2, refer to Figures 1-12 This is the second embodiment of the present invention, which differs from the first embodiment in that: the buffer unit includes a sliding sleeve 317 slidably connected to the crossbar 311 near the compartment 31, a slider 318 fixedly connected to the inner wall of the sliding sleeve 317, the inner wall of the sliding sleeve 317 slidably connected to the corresponding crossbar 311, the outer wall of the slider 318 slidably connected to the corresponding groove 313, a bracket 319 fixedly connected to the side of the sliding sleeve 317 near the compartment 31, guide posts 320 symmetrically fixedly connected to both ends of the bracket 319, the top of the outer wall of the guide post 320 slidably connected to the auxiliary mirror 314, and a lifting spring 321 sleeved on the outer wall of the guide post 320, the two ends of the lifting spring 321 abutting against the bracket 319 and the auxiliary mirror 314 respectively.

[0027] Specifically, after the sliding sleeve 317 and the bracket 319 move the auxiliary mirror 314 to engage with the condenser lens 32, the auxiliary mirror 314 stops moving due to the obstruction of the condenser lens 32. At this time, the bracket 319 can still continue to move. The bracket 319 moves upward relative to the condenser lens 32. In this state, it will compress the lifting spring 321 to store force. The lifting spring 321 keeps the auxiliary mirror 314 and the condenser lens 32 in a stable fit. Since the auxiliary mirror 314 has a certain vertical movement space relative to the bracket 319, it can be buffered by the lifting spring 321 at the moment of engagement with the condenser lens 32, avoiding violent impact with the condenser lens 32 and damage.

[0028] Reference Figures 2-12 A square groove is provided on the side of the compartment 31 near the corresponding bracket 319, and the inner wall of the square groove is in contact with the bracket 319.

[0029] Specifically, when the bracket 319 is not driven by the sliding sleeve 317, it is inside the square groove to avoid interfering with the optical path in the compartment 31.

[0030] Reference Figure 3 The condenser lens 32 is a Fresnel lens, and its bottom surface is the effective surface, which is composed of several concentric rings. The top surface of the auxiliary lens 314 matches the effective surface of the condenser lens 32.

[0031] Specifically, when the auxiliary mirror 314 is used in conjunction with the condenser mirror 32, it can counteract the light-concentrating effect of the condenser mirror 32, preventing light from still converging on the photovoltaic cell 315 when it is overheated.

[0032] Reference Figure 9 and Figure 10 The sliding sleeve 317 has a circular hole at one end near the drive rod 310 that extends to the other end. The inner wall of the circular hole is fixedly connected to the slider 318, and the inner diameter of the circular hole matches the outer diameter of the crossbar 311.

[0033] Specifically, the sliding sleeve 317 engages with the outer wall of the crossbar 311 through a circular hole. When the crossbar 311 is displaced, it will move along the inner wall of the sliding sleeve 317.

[0034] Reference Figures 3-11 The auxiliary mirror 314 has symmetrical connecting blocks on both sides, and the inner wall of the connecting block is adaptively slidably connected to the outer wall of the guide post 320.

[0035] Specifically, the auxiliary mirror 314 is connected to the guide post 320 through a connecting block. Since the auxiliary mirror 314 is constrained by the two guide posts 320 at the same time, it can only move along the axis of the guide post 320. The guide post 320 has a certain curvature, and its curvature is concentric with the sliding sleeve 317. The rest of the structure is the same as that of Embodiment 1.

[0036] Based on embodiments 1-2, the working principle of this invention is as follows: Sunlight is focused by the concentrator 32 and irradiates the photovoltaic cell 315. The photovoltaic cell 315 generates electricity and heats up. When the temperature rises to the set value of the snap-on switch 316, the switch closes, the coil 38 is energized to generate a magnetic field, and the telescopic rod 36 inside the sleeve 35 extends under the action of electromagnetic force, pushing the drive block 39 upward. The drive block 39 presses the inclined block in the middle of the drive rod 310 through the inclined surface, converting the vertical movement into a horizontal thrust. The drive rod 310 drives the crossbar 311 to slide into the substrate 2. The crossbar 311 compresses the return spring 312 to store its force. The groove 313 on the outer wall of the crossbar 311 cooperates with the slider 318 in the sliding sleeve 317, forcing the sliding sleeve 317 to rotate around its own axis. The sliding sleeve 317 drives the bracket 319 and the guide post 320 to swing, and the auxiliary mirror 314 on the guide post 320 swings accordingly. The auxiliary mirror 314 is moved to contact with the effective surface of the concentrator 32. At the moment of contact, the lifting spring 321 is compressed to absorb the impact and maintains a tight fit between the auxiliary mirror 314 and the concentrator 32 in a continuous contact state. At this time, the incident sunlight is scattered when it passes through the auxiliary mirror 314 after being focused by the concentrator 32, and is no longer focused on the surface of the photovoltaic cell 315. The radiation intensity received by the photovoltaic cell 315 decreases, the heating rate decreases, and a heat dissipation window period is obtained. When the temperature of the photovoltaic cell 315 drops below the calibrated value, the snap switch 316 is opened, the coil 38 is demagnetized, the reset spring 312 releases its stored force to push the crossbar 311 and the drive rod 310 to reset, the preload spring 37 releases its stored force to push the telescopic rod 36 and the drive block 39 to reset, the auxiliary mirror 314 returns to the initial position with the crossbar 311, and the photovoltaic cell 315 receives the focused light again and resumes the concentrated power generation state.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-efficiency concentrated photovoltaic power generation device, comprising a tracking frame (1) and a substrate (2) disposed on top of the tracking frame (1), characterized in that: It also includes a light-concentrating mechanism (3) disposed inside the substrate (2); The focusing mechanism (3) includes several compartments (31) arranged in a rectangular array on the top of the substrate (2), a focusing lens (32) disposed on the top of the compartments (31), a housing (33) disposed on the side wall of the substrate (2), a movable cavity (34) disposed inside the housing (33), a sleeve (35) disposed on the inner wall of the movable cavity (34), a telescopic rod (36) disposed inside the sleeve (35), a preload spring (37) disposed on the top of the telescopic rod (36), a coil (38) sleeved on the outer wall of the sleeve (35), a drive block (39) disposed on the top of the telescopic rod (36), a drive rod (310) disposed on the side of the movable cavity (34) near the substrate (2), and several linear arrays. A crossbar (311) is arranged in a linear array on the side of the drive rod (310) away from the drive block (39), a return spring (312) is arranged on the end of the crossbar (311) away from the drive rod (310), several grooves (313) are arranged in a linear array on the outer wall of the crossbar (311), a buffer unit is arranged in the compartment (31) near the corresponding crossbar (311), an auxiliary mirror (314) is arranged inside the buffer unit, a photovoltaic cell (315) is arranged at the bottom of the inner wall of the compartment (31), and a snap switch (316) is arranged at the bottom of the photovoltaic cell (315) closest to the coil (38). The two ends of the coil (38) are fixedly connected to the two terminals of the snap switch (316).

2. The high-efficiency concentrated photovoltaic power generation device according to claim 1, characterized in that: The drive block (39) is triangular in shape, and the drive rod (310) is provided with an inclined block near the drive block (39), and the inclined block is slidably connected to the drive block (39).

3. The high-efficiency concentrated photovoltaic power generation device according to claim 1, characterized in that: The inner wall of the substrate (2) is provided with a number of deep holes in a linear array, and the inner wall of the deep holes is slidably connected to the corresponding crossbar (311).

4. The high-efficiency concentrated photovoltaic power generation device according to claim 1, characterized in that: The buffer unit includes a sliding sleeve (317) disposed on the crossbar (311) near the compartment (31), a slider (318) disposed on the inner wall of the sliding sleeve (317), the inner wall of the sliding sleeve (317) being slidably connected to the corresponding crossbar (311), the outer wall of the slider (318) being slidably connected to the corresponding groove (313), a bracket (319) disposed on the side of the sliding sleeve (317) near the compartment (31), guide posts (320) symmetrically disposed at both ends of the bracket (319), the top of the outer wall of the guide post (320) being slidably connected to the auxiliary mirror (314), and a lifting spring (321) sleeved on the outer wall of the guide post (320), the two ends of the lifting spring (321) abutting against the bracket (319) and the auxiliary mirror (314) respectively.

5. The high-efficiency concentrated photovoltaic power generation device according to claim 1, characterized in that: The compartment (31) has a square groove on the side near the corresponding bracket (319), and the inner wall of the square groove is in contact with the bracket (319).

6. The high-efficiency concentrated photovoltaic power generation device according to claim 1, characterized in that: The condenser lens (32) is a Fresnel lens, the bottom surface of which is the effective surface, which is composed of several concentric rings. The top surface of the auxiliary lens (314) matches the effective surface of the condenser lens (32).

7. The high-efficiency concentrated photovoltaic power generation device according to claim 4, characterized in that: The sliding sleeve (317) has a circular hole extending to the other end near the drive rod (310). The inner wall of the circular hole is fixedly connected to the slider (318), and the inner diameter of the circular hole matches the outer diameter of the crossbar (311).

8. The high-efficiency concentrated photovoltaic power generation device according to claim 4, characterized in that: The auxiliary mirror (314) is symmetrically provided with connecting blocks on both sides, and the inner wall of the connecting block is adaptively slidably connected to the outer wall of the guide post (320).

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