A thousand-fold concentrated photovoltaic device

Abstract

This invention relates to a 1000x concentrated photovoltaic device, comprising: a light guide structure including a base and a limiting block; a fixing groove formed on one end face of the base; a side wall of the limiting block and the inner side wall of the fixing groove abutting against the outer side wall of a secondary optical prism to fix the secondary optical prism; and a heat dissipation module including a module housing and a heat sink; a metal cylinder disposed at the bottom of the module housing; the base being connected inside the metal cylinder; and the heat sink being installed at the bottom of the metal cylinder. This 1000x concentrated photovoltaic device fixes the secondary optical prism by using the side wall of the limiting block and the inner side wall of the fixing groove to abut against the outer side wall of the secondary optical prism, thus improving the stability of the secondary optical prism. Furthermore, the heat sink of this 1000x concentrated photovoltaic device maintains a certain distance from the module housing, allowing space for hot air convection while dissipating heat, thus avoiding dense heat concentration.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, and specifically to a thousand-fold concentrated photovoltaic device. Background Technology

[0002] Concentrated photovoltaics (CPPV) differs from traditional crystalline silicon photovoltaics in that it requires optical focusing through Fresnel lenses on the photovoltaic cells to generate energy, which is then converted into electricity through the high conversion efficiency of triple-junction III-V gallium arsenide cells and the photovoltaic effect.

[0003] Chinese patent CN201610721230.6 discloses an array-type concentrated photovoltaic power generation device, which includes a housing and a support for assembling multiple concentrated photovoltaic modules. The concentrated photovoltaic module includes a concentrated photovoltaic module for converting solar energy into electrical energy. A concentrated photovoltaic module support is installed at the lower end of the concentrated photovoltaic module. The entire concentrated photovoltaic module support is mounted on a Y-axis. A hinge pin is installed at the mounting position. A hinge pin is also provided on both sides of the lower end of the concentrated photovoltaic module support. A connecting rod is installed on the hinge pin. A cylindrical rack that can slide on the Y-axis is installed at a certain distance from the installation position of the concentrated photovoltaic module support. The end face of the cylindrical rack near the concentrated photovoltaic module support extends downward, and hinge pins are also installed at both ends of the extension. The concentrated photovoltaic module includes a battery chip. A prism for concentrating light to the battery chip is installed above the battery chip. A Fresnel lens for concentrating light to the prism is provided above the prism.

[0004] The Fresnel lens of the concentrated photovoltaic power generation device involved in the above patent is bonded to the top of the upper and lower connectors of the module with optical adhesive. This method is prone to damage to the battery cell packaging during processing or transportation, causing bubbles or tears at the adhesive connection, which in turn affects the stability of the secondary optical prism.

[0005] Furthermore, Chinese patent CN 202855778U discloses a heat sink for concentrated photovoltaic (PV) systems, including secondary heat sink fins, main heat sink fins, a heat sink base plate, circular holes for mounting concentrated PV photoelectric conversion receivers, and a concentrated PV photoelectric conversion receiver mounting area. The secondary heat sink fins are arranged in multiple cylindrical or polygonal columnar shapes, and the main heat sink fins are arranged in multiple polygonal columnar or any columnar shape. The heat sink base plate has a concentrated PV photoelectric conversion receiver mounting area and multiple circular holes for mounting the concentrated PV photoelectric conversion receivers. The circular holes for mounting the concentrated PV photoelectric conversion receivers can be inside or outside the concentrated PV photoelectric conversion receiver mounting area.

[0006] Although the concentrated photovoltaic heat dissipation module involved in the above patent can achieve heat dissipation, the concentrated distribution of batteries leads to a concentrated heat field. In a dry and windless environment, the passive aluminum heat dissipation material heat sink provides insulation, resulting in poor heat dissipation efficiency of the heat dissipation module.

[0007] In summary, existing photovoltaic power generation devices typically attach secondary optical prisms to the cell surface using adhesive. This method is prone to damage during processing or transportation, leading to air bubbles or tears in the adhesive layer, causing the secondary optical prisms to shift and become unstable, thus compromising their focusing effect. Furthermore, the concentrated cell distribution results in a concentrated heat field. In dry, windless environments, the passive aluminum heat sink provides only insulation, leading to poor heat dissipation efficiency of the heat dissipation module. Summary of the Invention

[0008] The purpose of this invention is to propose a thousand-fold concentrated photovoltaic device, which aims to solve the technical problems of poor bonding stability of existing secondary optical prisms and poor heat dissipation efficiency of batteries.

[0009] To achieve the above objectives, the present invention proposes a thousand-fold concentrated photovoltaic device, comprising:

[0010] A light guide structure includes a base and a limiting block. The limiting block is connected to one side of the base. A fixing groove for accommodating a secondary optical prism is opened on one end face of the base. The limiting block is connected to the opening of the fixing groove. One side wall of the limiting block and the inner side wall of the fixing groove abut against the outer side wall of the secondary optical prism to fix the secondary optical prism.

[0011] It also includes a heat dissipation module, which includes a module housing and a heat sink. The bottom of the module housing is provided with multiple downwardly pressed metal cylinders, the base is connected to the inside of the metal cylinders, and the heat sink is installed at the bottom of the metal cylinders.

[0012] As a further improvement of the present invention: the cross-sectional area of ​​the opening of the fixing groove gradually decreases towards the other end face of the base; or,

[0013] The fixing groove has a conical structure.

[0014] As a further improvement of the present invention: the limiting block is provided with a light-transmitting groove, and the limiting block is provided with a first blocking part located at the edge of the light-transmitting groove, the first blocking part being used to abut against the secondary optical prism in the fixing groove.

[0015] As a further improvement of the present invention: the base is provided with a sliding groove, and the limiting block is provided with a connecting part that matches the sliding groove. The connecting part is engaged in the sliding groove so that the limiting block can be slidably disposed relative to the base.

[0016] As a further improvement of the present invention: the slide includes a first groove and a second groove, the first groove and the second groove are respectively opened on opposite end faces of the base, and the first groove extends in a straight line toward the second groove.

[0017] As a further improvement of the present invention: the module housing is a beveled aluminum metal housing, and the top surface of the metal housing is a non-closed surface.

[0018] As a further improvement of the present invention: the metal cylinders are rectangular and arranged in the horizontal and vertical directions at the bottom of the module box, and the metal cylinders are spaced at the same distance.

[0019] As a further improvement of the present invention: the metal cylinder is in the shape of an inverted cone, and the diameter of the connection between the metal cylinder and the module housing is larger than the diameter of the heat sink mounting location.

[0020] As a further improvement of the present invention: the heat sink is a finned heat sink, and the maximum span of the finned heat sink is the size of a lens.

[0021] As a further improvement of the present invention: a power generation module is also provided at the bottom of the metal cylinder, and the power generation module is connected to the finned heat sink.

[0022] As a further improvement of the present invention: the optical module further includes a fixed bracket and a secondary optical prism. The fixed bracket is installed inside the base, the fixed groove is disposed in the middle of the fixed bracket, the upper part of the secondary optical prism is connected to the limiting block, and the lower part of the secondary optical prism is hollow and placed between the fixed bracket and the bottom plate of the base.

[0023] As a further improvement of the present invention: the secondary optical prism is an inverted trapezoidal prism, and the slope of the fixing groove is consistent with the slope of the inclined side of the secondary optical prism.

[0024] As a further improvement of the present invention: the base is an aluminum casting with a square bottom surface and connecting holes at the four corners of the bottom surface; a hollow trapezoidal protrusion is provided at the center of the bottom surface, and arched channels are provided in front of and behind the trapezoidal protrusion.

[0025] As a further improvement of the present invention: when the secondary optical prism is installed in the fixing slot, the distance between the secondary optical prism and the surface of the battery below is less than 1 mm.

[0026] As a further improvement of the present invention: the limiting block is installed on the top of the base, the center of the limiting block is a square through hole, and the four corners of the square through hole are chamfered.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This thousand-fold concentrated photovoltaic device is connected to the slot of the fixing groove by a limiting block. The limiting block can prevent the secondary optical prism from detaching from the fixing groove of the base. Furthermore, the side wall of the limiting block and the inner side wall of the fixing groove abut against the outer side wall of the secondary optical prism to fix the secondary optical prism, improve the stability of the secondary optical prism, and prevent the secondary optical prism from shifting in the fixing groove.

[0029] In addition, this thousand-fold concentrated photovoltaic device uses a stamping method to protrude a certain height at the battery mounting area of ​​the module housing, so that the heat sink is kept at a certain distance from the module housing. This allows for heat dissipation while still providing space for hot air convection, thus avoiding the formation of dense heat fields that would reduce the efficiency of the heat dissipation module. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the photovoltaic device with a thousandfold concentration of light according to this application;

[0032] Figure 2 This is a front view of Embodiment 1 of the photovoltaic device with a thousandfold concentration according to this application;

[0033] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the photovoltaic device with a thousandfold concentration capability according to this application;

[0034] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0035] Figure 5 This is another structural schematic diagram of Embodiment 2 of the photovoltaic device with a thousandfold concentration of light according to this application;

[0036] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the photovoltaic device with a thousandfold concentration of light according to this application;

[0037] Figure 7 This is a cross-sectional view of Embodiment 3 of the photovoltaic device with a thousandfold concentration capability according to this application;

[0038] Figure 8 This is a top view of Embodiment 3 of the photovoltaic device with a thousandfold concentration according to this application;

[0039] Figure 9 This is an exploded view of Embodiment 3 of the thousand-fold concentrated photovoltaic device of this application;

[0040] Figure 10 This is a schematic diagram of the structure of Embodiment 4 of the photovoltaic device with a thousandfold concentration of light according to this application;

[0041] Figure 11 This is a front view of Embodiment 4 of the photovoltaic device with a thousandfold concentration capability according to this application;

[0042] Figure 12 This is a top view of Embodiment 4 of the photovoltaic device with a thousandfold concentration according to this application;

[0043] Figure 13 This is another structural schematic diagram of Embodiment 4 of the thousand-fold concentrated photovoltaic device of this application.

[0044] Explanation of icon numbers:

[0045] label name label name 1 Limit block 2 base 3 Secondary optical prism 4 Battery 5 substrate 11 Light-transmitting groove 12 First blocking section 13 Connection part 21 Fixed groove 22 chute 23 Connection hole 24 Electrode outlet groove 25 Radiation opening 56 arched passage 54 Fixed bracket 58 support plate 61 Module enclosure 62 Metal cylinder 63 Finned heat sink 64 Power generation module 71 Fresnel optical glass lenses

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0050] Example 1

[0051] Please see Figures 1-2 In this embodiment, the 1000x concentrated photovoltaic device comprises six main components: a battery module, a light guide structure, a heat dissipation module, a module box assembly, a tracking system, and a truss support assembly. The 1000x concentrated photovoltaic device uses optical lenses to concentrate solar energy, which is then radiated onto the photovoltaic cells to generate electrical output.

[0052] Specifically, the module housing assembly includes a module housing 61 and a metal cylinder 62 mounted on the bottom of the module housing 61. The heat dissipation module includes a finned heat sink 63 mounted on the bottom of the metal cylinder 62.

[0053] A Fresnel optical glass lens 71 with 99.9% light transmittance and ultra-white embossed finish is mounted on top of the module housing 61. This lens measures 160*160mm or 320*320mm, a size 1000 times the area of ​​the battery. A 5*5mm or 10*10mm triple-junction III-V gallium arsenide battery is installed inside the metal cylinder 62, encapsulated on the battery module, with electrode wires extending from the battery. Furthermore, a secondary optical prism 3, made of K9 optical glass, is mounted above the battery module to ensure a uniform light spot on the battery surface. The battery module is welded to an aluminum finned heat sink 63, and the metal cylinder 62 encloses the battery module and the secondary optical prism 3.

[0054] In this embodiment, the center points of the 1000x concentrated photovoltaic device, including the Fresnel lens 71, the secondary optical prism 3, the battery 4, and the finned heat sink 63, are all orthogonal to the direction of sunlight, thus achieving the effect of concentrated photovoltaic power generation. If the optical axis deviates from the orthogonal alignment of the components with the sunlight, damage to the circuit components in the concentrated light path can easily occur. Therefore, this 1000x concentrated photovoltaic device uses a vertical module box structure. If the optical axis deviates from the light path, the module box can block the light path, preventing it from focusing and avoiding damage to the circuit components due to high-intensity light and heat. Furthermore, the secondary optical prism 3 is designed using total internal reflection, which can reduce the accuracy deficiencies caused by mechanical errors in the azimuth and direction angle reducers and human installation errors during tracking. It can also uniformly guide the light source to the battery 4 through the light guide structure, reducing light source loss.

[0055] Example 2

[0056] Please see Figures 3-5 In this embodiment, the light guiding structure of the thousand-fold concentrated photovoltaic device includes:

[0057] Base 2,

[0058] Limiting block 1, wherein the limiting block 1 is connected to one side of the base 2; wherein,

[0059] One end face of the base 2 is provided with a fixing groove 21 for accommodating the secondary optical prism 3. The limiting block 1 is connected to the opening of the fixing groove 21. One side wall of the limiting block 1 and the inner side wall of the fixing groove 21 abut against the outer side wall of the secondary optical prism 3 to fix the secondary optical prism 3.

[0060] Specifically, in this embodiment, the secondary optical prism 3 has a three-dimensional structure and is enclosed within the fixing groove 21 of the base 2. The limiting block 1 abuts against the top surface of the secondary optical prism 3 near one side wall of the base 2, while the inner side wall of the fixing groove 21 of the base 2 abuts against the outer side wall below the top surface of the secondary optical prism 3. By abutting against each other, the displacement of the secondary optical prism 3 is restricted, thereby achieving the function of fixing the secondary optical prism 3.

[0061] In this embodiment, the light guide structure is connected to the opening of the fixing groove 21 by a limiting block 1. The limiting block can prevent the secondary optical prism 3 from detaching from the fixing groove 21 of the base 2. Furthermore, the side wall of the limiting block 1 and the inner side wall of the fixing groove 21 abut against the outer side wall of the secondary optical prism 3 to fix the secondary optical prism 3, improve the stability of the secondary optical prism 3, and thus prevent the secondary optical prism 3 from shifting within the fixing groove 21.

[0062] Furthermore, the cross-sectional area of ​​the opening of the fixing groove 21 gradually decreases towards the other end face of the base 2; or,

[0063] The fixing groove 21 has a conical structure.

[0064] Specifically, the base 2 has a pyramidal structure, and the opening of the fixing groove 21 is located on the top surface of the base 2, with the cross-sectional area of ​​the opening of the fixing groove 21 gradually decreasing towards the bottom surface of the base 2. This configuration gives the fixing groove 21 an inverted conical structure, which can be adapted to the focusing direction of the secondary optical prism 3, directing the light towards and radiating onto the battery 4 at the bottom of the base 2. It is understood that because the fixing groove 21 has a conical structure, its multiple inclined sidewalls fit against the sidewalls of the secondary optical prism 3, and the slope of the sidewalls of the fixing groove 21 is the same as the slope of the corresponding sidewall of the secondary optical prism 3, thereby further fixing the secondary optical prism 3 and preventing it from rotating.

[0065] It is worth noting that in other embodiments, in order to adapt to the shape and structure of the secondary optical prism 3, the fixing groove 21 can also be a conical structure. Therefore, this technical solution does not limit the structure of the fixing groove 21.

[0066] Furthermore, the limiting block 1 has a light-transmitting groove 11.

[0067] Specifically, the limiting block 1 has a light-transmitting groove 11 that runs through both ends in the middle, so that light can pass through the limiting block 1 and irradiate the secondary optical prism 3, enabling the secondary optical prism 3 to focus light.

[0068] Furthermore, the limiting block 1 is provided with a first blocking part 12 located at the edge of the light-transmitting groove 11, and the first blocking part 12 is used to abut against the secondary optical prism 3 in the fixing groove 21.

[0069] Specifically, please refer to Figure 2 In order to prevent the secondary optical prism 3 from detaching from the fixing groove 21 of the base 2 and sliding out of the light transmission groove 11, the edge of the limiting block 1 is provided with a first blocking part 12 with a beveled structure. The first blocking part 12 abuts against the top surface of the secondary optical prism 3, thereby preventing the secondary optical prism 3 from sliding out.

[0070] Furthermore, the area of ​​the first blocking portion 12 is less than or equal to 1% of the area of ​​the light-transmitting groove 11.

[0071] Specifically, in order to improve illumination efficiency, the first blocking portion 12 should not obstruct the top surface of the secondary optical prism 3 by an excessively large area. Therefore, in this embodiment, the area of ​​the first blocking portion 12 is less than 1% of the area of ​​the light-transmitting groove 11. Furthermore, in other embodiments, the area of ​​the first blocking portion 12 may also be equal to 1% of the area of ​​the light-transmitting groove 11.

[0072] Furthermore, the limiting block 1 is detachably connected to the base 2.

[0073] Specifically, in order to facilitate the installation of the secondary optical prism 3 into the fixing slot 21, the limiting block 1 of this light guide structure is detachably connected to the base 2.

[0074] Furthermore, the base 2 is provided with a sliding groove 22, and the limiting block 1 is provided with a connecting part 13 that matches the sliding groove 22. The connecting part 13 is engaged in the sliding groove 22 so that the limiting block 1 can be slidably disposed relative to the base 2.

[0075] Specifically, since the connecting part 13 of the limiting block 1 is engaged in the sliding groove 22 of the base 2, the limiting block 1 can slide relative to the base 2, thereby realizing the detachable assembly of the limiting block 1 and the base 2, which facilitates the replacement of the secondary optical prism 3.

[0076] Furthermore, the slide 22 includes a first slot and a second slot, the first slot and the second slot are respectively opened on opposite end faces of the base 2, and the first slot extends in a straight line toward the second slot.

[0077] Specifically, the base 2 is provided with two sliding grooves 22, which are respectively opened on the opposite end faces of the base 2; and the first groove and the second groove of the sliding groove 22 are also respectively opened on the other opposite end faces of the base 2. Since the number and structure of the connecting parts 13 of the limiting block 1 match the number and structure of the sliding grooves 22 of the base 2, and the first groove extends in a straight line towards the second groove, the user can insert the limiting block 1 laterally from one end of the base 2 and slide it out from the other end of the base 2 through the base 2.

[0078] Furthermore, the limiting block 1 and the base 2 are made of opaque material.

[0079] Specifically, to prevent light generated when the secondary optical prism 3 shifts from shining onto areas other than the battery 4 and damaging other components, the base 2 and the limiting block 1 of this light guide structure are made of an opaque material, such as ceramic. Because the ceramic base 2 and the limiting block 1 are opaque, they can block light from areas other than the battery 4, thus protecting other components.

[0080] Furthermore, the limiting block 1 and the base 2 are made of a material with low thermal conductivity; or,

[0081] The limiting block 1 and the base 2 are made of ceramic stone.

[0082] Specifically, the limiting block 1 and the base 2 are made of a low thermal conductivity material, such as ceramic. The ceramic base 2 and the limiting block 1 can both insulate against the heat generated by the secondary optical prism 3, thereby protecting other components.

[0083] Please see Figure 5 This embodiment also includes a substrate 5, and the base 2 is connected to the substrate 5.

[0084] Specifically, the substrate 5 is used to connect the battery 4 and the wires associated with the battery 4. The light generated by the secondary optical prism 3 in the base 2 can illuminate the surface of the battery 4 on the substrate 5. An electrode outlet groove 24 is provided at the bottom of the base 2, through which the wires electrically connected to the battery can pass to external devices.

[0085] Furthermore, the base 2 has connecting holes 23, through which the base 2 is bolted to the substrate 5. In this embodiment, the base 2 has four connecting holes 23 located at its four ends, and the substrate 5 has corresponding through holes, allowing the base 2 and substrate 5 to be fixedly connected by bolts.

[0086] Furthermore, a battery 4 is disposed on the substrate 5, and a radial opening 25 is provided on one side of the base 2 near the battery 4. The groove of the fixing groove 21 extends toward the radial opening 25. In this embodiment, the radial opening 25 is used for light transmission, so that the light generated by the secondary optical prism 3 passes through the radial opening 25 and then irradiates the surface of the battery 4.

[0087] Furthermore, a second blocking part (not shown in the figure) is provided in the fixing groove 21. The second blocking part is used to abut against the secondary optical prism 3 so that the end face of the secondary optical prism 3 forms a gap distance of not less than 1 mm with the surface of the battery 4. This arrangement can effectively prevent the secondary optical prism 3 from directly contacting the surface of the battery 4, and prevent the secondary optical prism 3 from damaging the surface of the battery 4.

[0088] Furthermore, the concentrating photovoltaic device also includes a secondary optical prism 3, wherein the distance between the end face of the secondary optical prism 3 and the surface of the battery 4 is less than or equal to 5% of the height of the secondary optical prism 3. This arrangement avoids light loss from the secondary optical prism 3. Additionally, the smooth inner wall surface of the fixing groove 21 in this embodiment prevents damage to the secondary optical prism 3 and also avoids light absorption and reflection losses.

[0089] In summary, this light guide structure uses ceramic stone with extremely low thermal conductivity. The secondary optical prism is detachably embedded in the substrate using a sliding groove. At the same time, the end face of the secondary optical prism is set to maintain a short distance from the surface of the battery cell. This satisfies the light transmission requirements while ensuring that the secondary optical prism will not damage the surface of the battery, wires, or package. In addition, since the base and limiting block are made of opaque ceramic stone with low thermal conductivity, the light generated by the secondary optical prism cannot reach areas outside the battery, thus providing shielding protection for components outside the battery.

[0090] Example 3

[0091] Please see Figures 6-9 This embodiment is designed for a lens optical path of 160*160mm and a focal length of 150mm. The light guide structure of this thousand-fold concentrated photovoltaic device includes: a secondary optical prism 3, a limiting block 1, a base 2, and a fixing bracket 54. The fixing bracket 54 has a fixing groove 21 in the middle, and the slope of the fixing groove 21 is consistent with the slope of the inclined side of the secondary optical prism 3. The fixing bracket 54 is trapezoidal in shape and is fixedly supported by four support plates 58 located on the bottom surface of the trapezoid.

[0092] The base 2 is an aluminum casting with a square bottom surface. Connecting holes 23 are provided at the four corners of the bottom surface. A hollow trapezoidal protrusion is provided at the center of the bottom surface. Arched channels 56 are provided before and after the trapezoidal protrusion.

[0093] The slope of the inclined side of the fixed bracket 54 is the same as the slope of the inclined side of the base 2.

[0094] like Figure 9 As shown, the secondary optical prism 3 is installed in the fixing groove of the fixing bracket 54, and the base 2 encloses the secondary optical prism 3 and the fixing bracket 54 therein. When the secondary optical prism 3 is installed in the fixing groove, the surface distance between the secondary optical prism 3 and the battery below is less than 1 mm.

[0095] like Figure 8 As shown, the limiting block 1 is installed on the top of the base 2. The center of the limiting block 1 is a square through hole, and the four corners of the square through hole are chamfered.

[0096] During operation, the secondary optical prism 3 is placed into the fixing slot of the fixing bracket 54 and fixed. The base 2 encloses the secondary optical prism 3 and the fixing bracket 54 within it. A limiting block is installed on the top of the base 2 to prevent the secondary optical prism 3 from sliding upward out of the fixing slot. The base 2 is fixed to the heat dissipation device with screws to form an integral unit. A solar panel is also installed between the heat dissipation device and the prism. The arched channel 56 on the base 2 allows wires to pass through the base 2.

[0097] Sunlight is optically focused through a Fresnel lens on a photovoltaic cell to generate energy, which then shines into a secondary optical prism 3. The secondary optical prism 3 uniformly reflects the light onto the cell surface, and then the high conversion efficiency of the triple-junction III-V gallium arsenide cell achieves photovoltaic effect to generate electricity.

[0098] Concentrated photovoltaic (CPV) power generation uses Fresnel lenses to concentrate sunlight onto gallium arsenide (GaAs) solar cells, thus achieving the photovoltaic effect. However, the optical axis may shift or deviate due to factors such as the design of the light spot, the manufacturing process, tracking accuracy, alternating cloudy and sunny conditions, installation errors, and the start-up and commissioning of the equipment. Since the size of the light spot depends on the size of the solar cell, it is limited by the mechanical tracking accuracy and the aforementioned issues. If it deviates, the light spot will fall outside the solar cell and cannot generate electricity. By using an inverted prism with a wider top and narrower bottom and a total internal reflection design, the deviated light is evenly and effectively guided to the surface of the lower solar cell, thus achieving the photovoltaic effect and generating electricity.

[0099] By adopting the above structural design, the central axis deviation range of the secondary optical prism 3 is increased from 15° to 25°, the light guiding area is increased by 1.5 times, and the reflection loss caused by the deviation is reduced. It is necessary to ensure that the prism accuracy is within ±0.1mm, and that the prism surface is smooth and undamaged, without scratches or missing corners.

[0100] When the light-collecting size of the gallium arsenide battery is designed to be 5*5mm, and the height of the secondary optical prism is 1.3 times the light-collecting size of the upper surface of the secondary optical prism, total internal reflection can be achieved. This results in the most uniform and optimal light-collecting effect on the battery surface, and prevents energy leakage, energy loss, and burn-out of accessory parts. Furthermore, it allows for a suitable reduction in the accuracy of precision tracking, thereby reducing development costs.

[0101] In summary, this embodiment provides a light guide structure for a thousand-fold concentrated photovoltaic device, which can improve the problem of light spot movement deviation caused by design, processing, tracking accuracy, alternating cloudy and sunny conditions, installation errors, and equipment startup in traditional processes; at the same time, it effectively avoids secondary optical prisms from contacting the battery surface and causing damage to the battery.

[0102] Example 4

[0103] Please see Figures 10-13 This embodiment of the 1000x concentrated photovoltaic device includes four battery modules. The heat dissipation module of the 1000x concentrated photovoltaic device includes a module housing 61 and a heat sink; the module housing 61 is a sheet metal bending or stamping form; four downwardly stamped metal cylinders 62 are provided at the bottom; the module housing and the metal cylinders are connected by sealing gaskets and fastening screws. The heat sink is installed at the bottom of the metal cylinders 62. The module housing 61 is a rectangular aluminum metal housing; the metal cylinders 62 are spaced apart.

[0104] The heat sink is a finned heat sink 63, which is fastened to the metal cylinder with screws. A sealing ring is provided around the connection between the metal cylinder 62 and the finned heat sink 63.

[0105] like Figure 12 As shown, a power generation module 64 is also provided at the bottom of the metal cylinder, and the power generation module is connected to the finned heat sink 63.

[0106] During operation, a Fresnel optical lens is installed on the top of the module housing 61. Sunlight shines through the Fresnel optical lens and enters the module housing 61. The power generation module 64 includes a secondary optical prism module and a battery module. The sunlight entering the module housing 61 is refracted by the secondary optical prism so that the light spot falls evenly on the battery module. The battery module is installed on the heat sink 3 by welding.

[0107] In addition to dissipating the heat generated by power generation using finned heat sinks 63, the heat source is also indirectly dissipated through the outer shell of the module housing 61. Four downwardly pressed metal cylinders 62 are located at the bottom of the module housing 61, with the finned heat sinks 63 mounted on the bottom of each cylinder. This arrangement ensures that each finned heat sink 63 is independently positioned at a certain distance from the housing, increasing airflow and allowing for convection of hot air while simultaneously dissipating heat. During power generation, hot air can be smoothly exhausted from the top of the metal cylinders, preventing concentrated heat fields that could reduce the efficiency of the heat dissipation module. Furthermore, the recessed design within the module housing 61, due to the change in focal length, provides some protection against the risk of the focused photovoltaic beam burning the wiring.

[0108] like Figure 13 As shown, in another embodiment, the thousand-fold concentrated photovoltaic device is provided with sixteen battery modules.

[0109] In summary, this embodiment provides a heat dissipation module for a high-concentration photovoltaic device. The module features a stamped protrusion at the battery mounting area, maintaining a certain distance between the heat sink and the module housing. This allows for heat dissipation while still providing space for convection, preventing concentrated heat fields that could reduce the module's efficiency. The recessed design within the module housing, due to the change in focal length, also offers some protection against the risk of the focused photovoltaic beam burning the wiring.

[0110] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A kilo-watt concentrator photovoltaic device, characterized by, The utility model relates to a light guide structure, a heat dissipation module and an optical module, and relates to the technical field of optical modules. The light guide structure comprises a base and a limiting block connected to one side of the base, one end face of the base is provided with a fixing groove for accommodating a secondary optical prism, the limiting block is connected to the groove opening of the fixing groove, and the side wall of the limiting block and the inner side wall of the fixing groove abut against the outer side wall of the secondary optical prism to fix the secondary optical prism. The heat dissipation module comprises a module box body and a heat sink, the bottom of the module box body is provided with a plurality of metal cylinders punched downward, the base is connected to the metal cylinders, and the heat sink is installed at the bottom of the metal cylinders.

2. The kilo-watt concentrator photovoltaic device of claim 1, wherein, The cross-sectional area of the groove opening of the fixing groove gradually decreases towards the other end face of the base; or The fixing groove is a conical structure.

3. The kilo-watt concentrator photovoltaic device of claim 1, wherein, The limiting block is provided with a first blocking part at the edge of the light transmission groove, and the first blocking part is used for abutting against the secondary optical prism in the fixing groove.

4. The kilo-watt concentrator photovoltaic device of claim 1, wherein, The base is provided with a sliding groove, the limiting block is provided with a connecting part matched with the sliding groove, the connecting part is clamped in the sliding groove, and the limiting block is slidably arranged relative to the base.

5. The kilo-Watt concentrator photovoltaic device of claim 4, wherein, The sliding groove comprises a first groove opening and a second groove opening, the first groove opening and the second groove opening are respectively arranged at the opposite end faces of the base, and the first groove opening is linearly arranged towards the second groove opening.

6. The kilo-watt concentrator photovoltaic device of claim 1, wherein, The module box body is an inverted prismatic aluminum metal box body, and the top face of the metal box body is an open face.

7. The kilo-watt concentrator photovoltaic device of claim 1, wherein, The metal cylinders are arranged in the bottom of the module box body in a rectangular shape along the transverse direction and the longitudinal direction respectively, and the metal cylinders have the same spacing distance.

8. The kilo-Watt concentrator photovoltaic device of claim 7, wherein, The metal cylinders are inverted conical, and the diameter of the connection between the metal cylinders and the module box body is greater than the diameter of the installation position of the heat sink.

9. The kilo-watt concentrator photovoltaic device of claim 1, wherein, The heat sink is a fin heat sink, and the maximum span of the fin heat sink is the size of the lens.

10. The kilo-Watt concentrator photovoltaic device of claim 9, wherein, The bottom of the metal cylinder is further provided with a power generation module connected with the fin heat sink.

11. The kilo-Watt concentrator photovoltaic device of claim 1, wherein, The optical module further comprises a fixing support and a secondary optical prism, the fixing support is installed in the base, the fixing groove is arranged in the middle of the fixing support, the upper part of the secondary optical prism is connected with the limiting block, and the lower part of the secondary optical prism is hollow and arranged between the fixing support and the bottom plate of the base.

12. The kilo-Watt concentrator photovoltaic device of claim 11, wherein, The secondary optical prism is an inverted trapezoidal prism, and the slope of the fixing groove is consistent with the slope of the hypotenuse of the secondary optical prism.

13. The kilo-Watt concentrator photovoltaic device of claim 11, wherein, The base is an aluminum casting, the bottom face is a square, four connecting holes are arranged at the four corners of the bottom face respectively, a hollow trapezoidal protrusion is arranged at the center of the bottom face, and arched channels are arranged in front of and behind the trapezoidal protrusion respectively.

14. The kilo-Watt concentrator photovoltaic device of claim 11, wherein, When the secondary optical prism is installed in the fixing groove, the distance between the secondary optical prism and the surface of the lower battery is less than 1 mm.

15. The kilo-Watt concentrator photovoltaic device of claim 11, wherein, The limiting block is installed on the top of the base, the middle part of the limiting block is a square through hole, and chamfers are arranged at the four corners of the square through hole.

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