CN115799371A - Thousand-time concentrating photovoltaic device - Google Patents
Thousand-time concentrating photovoltaic device Download PDFInfo
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- CN115799371A CN115799371A CN202211378408.3A CN202211378408A CN115799371A CN 115799371 A CN115799371 A CN 115799371A CN 202211378408 A CN202211378408 A CN 202211378408A CN 115799371 A CN115799371 A CN 115799371A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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Abstract
The invention relates to a thousand-time concentrating photovoltaic device, which comprises: the light guide structure comprises a base and a limiting block, a fixing groove is formed in one end face of the base, and one side wall of the limiting block and the inner side wall of the fixing groove are abutted against the outer side wall of the secondary optical prism so that the secondary optical prism is fixed; the heat dissipation module comprises a module box body and a radiator, a metal cylinder is arranged at the bottom of the module box body, the base is connected into the metal cylinder, and the radiator is installed at the bottom of the metal cylinder. The kilo-power concentrating photovoltaic device is abutted against the outer side wall of the secondary optical prism through the side wall of the limiting block and the inner side wall of the fixing groove, so that the secondary optical prism is fixed, and the stability of the secondary optical prism is improved; in addition, the radiator of the thousand-time concentrating photovoltaic device keeps a certain distance from the module box body, and space is still reserved for forming hot air convection while heat dissipation, so that the phenomenon of intensive heat field concentration can be avoided.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a thousand-time concentrating photovoltaic device.
Background
The difference between the concentrating photovoltaic and the traditional crystal silicon photovoltaic is that the energy is generated by optically focusing through a Fresnel lens above a photovoltaic cell, and then the energy is generated by the photovoltaic effect through the high conversion rate of a three-junction III-V gallium arsenide cell.
Chinese patent CN201610721230.6 discloses an array type concentrating photovoltaic power generation device, which comprises a housing and a support for assembling a plurality of concentrating module mechanisms; the concentrating module mechanism comprises a concentrating photovoltaic module for converting solar energy into electric energy; the lower end of the concentrating photovoltaic module is provided with a concentrating photovoltaic module support, the whole concentrating photovoltaic module support is sleeved on a Y-shaped rotating shaft, a hinge pin is arranged at the sleeved position, two sides of the lower end of the concentrating photovoltaic module support are also provided with the hinge pin, a connecting rod is arranged on the hinge pin, a cylindrical rack which can slide on the Y-shaped rotating shaft is arranged at a certain position away from the mounting position of the concentrating photovoltaic module support, the end surface of one end of the cylindrical rack, which is close to the concentrating photovoltaic module support, extends downwards, and two ends of the extending position are also provided with the hinge pins; the concentrating photovoltaic module comprises a battery chip, and a prism used for concentrating light to the battery chip is arranged above the battery chip; and a Fresnel lens used for condensing light rays onto the prism is arranged above the prism.
The top that spotlight photovoltaic power generation device that above-mentioned patent related passes through optical cement and connects the top at module lower part connecting piece, and this way easily produces destruction to the battery piece encapsulation when processing or transportation, and adhesion junction bubble or formation are torn, influences secondary optical prism's stability then.
In addition, chinese patent CN 202855778U discloses a heat sink for concentrating photovoltaic, which includes secondary heat dissipation fins, primary heat dissipation fins, a heat sink bottom plate, a circular hole for mounting a concentrating photovoltaic photoelectric conversion receiver, and a concentrating photovoltaic photoelectric conversion receiver mounting area. The secondary radiating fins are formed by arranging a plurality of cylindrical or polygonal columnar shapes, the primary radiating fins are formed by arranging a plurality of polygonal columnar shapes or any columnar shape, the radiator bottom plate is provided with a mounting area of the concentrating photovoltaic photoelectric conversion receiver and a plurality of round holes for mounting the concentrating photovoltaic photoelectric conversion receiver, and the round holes for mounting the concentrating photovoltaic photoelectric conversion receiver can be arranged inside or outside the mounting area of the concentrating photovoltaic photoelectric conversion receiver.
Although the concentrating photovoltaic heat dissipation module related to the patent can achieve the heat dissipation effect, the heat field is concentrated due to the concentrated distribution of the batteries, and in a dry and windless environment, the heat radiator made of the passive aluminum heat dissipation material has a heat preservation effect, so that the heat dissipation efficiency of the heat dissipation module is poor.
In summary, the conventional photovoltaic power generation devices generally adhere the secondary optical prism to the surface of the cell by glue. During processing or transportation, the packaging of the battery piece is easy to damage, so that bubbles are generated or tearing is formed on the adhesive layer, the secondary optical prism deviates, the secondary optical prism becomes unstable, and the light-gathering effect of the secondary optical prism cannot be ensured; meanwhile, the batteries are distributed and concentrated, so that a thermal field is concentrated, and in a dry and windless environment, the heat radiator made of the passive aluminum heat dissipation material has a heat insulation effect, and the heat dissipation efficiency of the heat dissipation module is poor.
Disclosure of Invention
The invention aims to provide a thousand-time concentrating photovoltaic device, and aims to solve the technical problems that an existing secondary optical prism is poor in bonding stability and poor in battery heat dissipation efficiency.
In order to achieve the above object, the present invention provides a thousand-fold concentrating photovoltaic device, comprising:
the light guide structure comprises a base and a limiting block, the limiting block is connected to one side of the base, a fixing groove for accommodating the secondary optical prism is formed in one end face of the base, the limiting block is connected to a notch of the fixing groove, and one side wall of the limiting block and the inner side wall of the fixing groove are abutted against the outer side wall of the secondary optical prism so that the secondary optical prism is fixed;
the heat dissipation module comprises a module box body and a radiator, a plurality of metal cylinders formed by downward stamping are arranged at the bottom of the module box body, the base is connected into the metal cylinders, and the radiator is arranged at the bottom of the metal cylinders.
As a further improvement of the invention: the cross-sectional area of the notch of the fixing groove is gradually reduced towards the other end surface of the base; or,
the fixing groove is of a cone structure.
As a further improvement of the invention: the light-transmitting groove has been seted up to the stopper, the stopper is provided with and is located the first barrier part at the edge of light-transmitting groove, first barrier part is used for the butt secondary optical prism in the fixed slot.
As a further improvement of the invention: the base has been seted up the spout, the stopper be provided with spout assorted connecting portion, connecting portion joint in the spout, so that the stopper for the base slidable sets up.
As a further improvement of the invention: the spout includes first notch, second notch, first notch and second notch set up respectively the relative both ends face of base, first notch court the direction straight line of second notch extends the setting.
As a further improvement of the invention: the module box body is a metal box body made of aluminum in a chamfered shape, and the top surface of the metal box body is a non-closed surface.
As a further improvement of the invention: the metal cylinders are rectangular and are arranged at the bottom of the module box body along the transverse direction and the longitudinal direction respectively, and the spacing distances of the metal cylinders are the same.
As a further improvement of the invention: the metal cylinder is in an inverted cone shape, and the diameter of the joint of the metal cylinder and the module box body is larger than that of the installation position of the radiator.
As a further improvement of the invention: the radiator is a fin radiator, and the maximum width of the fin radiator is the size of the lens.
As a further improvement of the invention: the bottom of the metal cylinder is also provided with a power generation module, and the power generation module is connected with the fin radiator.
As a further improvement of the invention: the optical module further comprises a fixing support and a secondary optical prism, the fixing support is mounted inside the base, the fixing groove is formed in the middle of the fixing support, the upper portion of the secondary optical prism is connected with the limiting block, and the lower portion of the secondary optical prism is arranged between the fixing support and the bottom plate of the base in a hollow mode.
As a further improvement of the invention: the secondary optical prism is an inverted trapezoidal prism, and the slope of the fixing groove is consistent with the slope of the bevel edge of the secondary optical prism.
As a further improvement of the invention: the base is an aluminum casting, the bottom surface of the base is square, and four vertex angles of the bottom surface are respectively provided with a connecting hole; the bottom surface center department be provided with inside hollow trapezoidal arch, trapezoidal arch channel is provided with respectively around protruding.
As a further improvement of the invention: when the secondary optical prism is installed in the fixing groove, the distance between the secondary optical prism and the surface of the battery below is less than 1 mm.
As a further improvement of the invention: the stopper is installed the base top, the stopper middle part is square through-hole, four apex angle departments of square through-hole are provided with the chamfer.
Compared with the prior art, the invention has the following beneficial effects:
the thousand-time concentrating photovoltaic device is connected to a notch of the fixing groove through the limiting block, and the limiting block can block the secondary optical prism from being separated from the fixing groove of the base; the outer side wall of the secondary optical prism is abutted against the inner side wall of the fixing groove through the side wall of the limiting block, so that the secondary optical prism is fixed, the stability of the secondary optical prism is improved, and the secondary optical prism is prevented from deviating in the fixing groove;
in addition, the battery mounting position of the module box body of the thousand-time concentrating photovoltaic device is protruded to a certain height in a stamping mode, so that a certain distance is kept between the radiator and the module box body, and space is still reserved for forming hot air convection while heat is dissipated; the efficiency of the heat dissipation module is prevented from being reduced due to the concentration of a dense thermal field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of a kilo-concentrating photovoltaic device according to the present application;
FIG. 2 is a front view of a first embodiment of a thousand-concentration photovoltaic device of the present application;
fig. 3 is a schematic structural diagram of a second embodiment of a kilo-concentrating photovoltaic device according to the present application;
FIG. 4 is an enlarged view of the point B in FIG. 3;
FIG. 5 is another schematic structural diagram of a second embodiment of a kilo-concentrating photovoltaic device of the present application;
FIG. 6 is a schematic structural diagram of a thousand-fold concentrating photovoltaic device according to a third embodiment of the present application;
fig. 7 is a cross-sectional view of a thousand-concentration photovoltaic device embodiment of the present application;
FIG. 8 is a top view of a thousand-concentration photovoltaic device embodiment III of the present application;
fig. 9 is an exploded view of a third embodiment of the kilo-concentrating photovoltaic device of the present application;
FIG. 10 is a schematic structural diagram of a thousand-concentration photovoltaic device according to a fourth embodiment of the present application;
fig. 11 is a front view of a thousand-concentration photovoltaic device embodiment four of the present application;
FIG. 12 is a top view of a thousand-concentration photovoltaic device embodiment four of the present application;
fig. 13 is another schematic structural diagram of a thousand-fold concentrating photovoltaic device according to a fourth embodiment of the present application.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name (R) |
| 1 | |
2 | |
| 3 | Secondary |
4 | Battery with a |
| 5 | |
11 | |
| 12 | |
13 | Connecting |
| 21 | |
22 | |
| 23 | Connecting |
24 | Electrode |
| 25 | Radiation opening | 56 | Arch- |
| 54 | |
58 | |
| 61 | |
62 | |
| 63 | |
64 | |
| 71 | Fresnel optical glass lens |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if the present invention relates to directional indications (such as up, down, left, right, front, back, 8230; \8230;), the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the expression "and/or" and/or "is used throughout, the meaning includes three parallel schemes, for example," A and/or B ", including scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example one
Referring to fig. 1-2, in the present embodiment, the kilo-concentrating photovoltaic device includes a battery module, a light guide structure, a heat dissipation module, a module box assembly, a tracking system, and a truss assembly. The kilo-power concentrating photovoltaic device concentrates solar energy through an optical lens, and the solar energy is radiated on a photovoltaic cell to generate electric energy for output.
Specifically, the module case assembly includes a module case 61 and a metal cylinder 62 installed at the bottom of the module case 61. The heat sink module includes a finned heat sink 63 mounted to the bottom of the metal cylinder 62.
Mounted above the module case 61 is an ultra-white embossed fresnel optical glass lens 71 with a transmittance of 99.9%, the size of which is 160 × 160mm or 320 × 320mm, which is 1000 times the cell area. And a 5 x 5mm or 10 x 10mm three-junction III-V gallium arsenide battery is arranged in the metal cylinder 62, and the battery is packaged on the battery module and leads out the electrode wires of the battery. In addition, a secondary optical prism 3 is arranged above the battery module, and the optical prism is made of K9 optical glass, so that the gathered light spots can uniformly fall on the surface of the battery. The battery module is joined to an aluminum fin heat sink 63 by welding, and the metal cylinder 62 covers the battery module and the secondary optical prism 3.
In the integral structure of the thousand-time concentrating photovoltaic device of the embodiment, the central points of the optical glass fresnel lens 71, the secondary optical prism 3, the battery 4 and the fin radiator 63 are all kept orthogonal to the incident direction of sunlight, so that the concentrating photovoltaic power generation effect is achieved. Once the optical axis deviates and the component is not orthogonal to the sunlight, the damage of the circuit parts caused by the light-gathering light path is easily caused. Therefore, the thousand-time concentrating photovoltaic device has the advantages that through the vertical cylinder type module box component structure, one optical axis deviates from the optical path, the module box component can separate the optical path to enable the optical path to be incapable of forming focusing, and circuit parts are prevented from being damaged due to high intense light and heat. In addition, the secondary optical prism 3 is designed by adopting a total reflection design principle, so that the accuracy deficiency compensation of azimuth angle, mechanical error of an azimuth angle reducer, artificial installation error and the like during tracking can be reduced, and the light source can be uniformly guided onto the battery 4 through a light guide structure, so that the light source loss is reduced.
Example two
Referring to fig. 3-5, in the present embodiment, the light guiding structure of the kilo-concentrating photovoltaic device includes:
the base 2 is provided with a plurality of grooves,
the limiting block 1 is connected to one side of the base 2; wherein,
a fixing groove 21 for accommodating the secondary optical prism 3 is formed in one end face of the base 2, the limiting block 1 is connected to a notch of the fixing groove 21, and a side wall of the limiting block 1 and an inner side wall of the fixing groove 21 are abutted to an outer side wall of the secondary optical prism 3, so that the secondary optical prism 3 is fixed.
Specifically, in the present embodiment, the secondary optical prism 3 has a three-dimensional structure, and the secondary optical prism 3 is housed in the fixing groove 21 of the base 2. The stopper 1 abuts against the top surface of the secondary optical prism 3 at a side wall close to the base 2, and 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, so that the deviation of the secondary optical prism 3 is limited by the abutment, thereby realizing the function of fixing the secondary optical prism 3.
The light guide structure of the embodiment is connected to the notch of the fixing groove 21 through the limiting block 1, and the limiting block can block the secondary optical prism 3 from separating from the fixing groove 21 of the base 2; and the inner side wall of the limiting block 1 and the inner side wall of the fixing groove 21 are abutted against the outer side wall of the secondary optical prism 3, so that the secondary optical prism 3 is fixed, the stability of the secondary optical prism 3 is improved, and the secondary optical prism 3 is prevented from deviating in the fixing groove 21.
Further, the cross-sectional area of the notch of the fixing groove 21 is gradually reduced toward the other end surface of the base 2; or,
the fixing groove 21 is of a cone structure.
Specifically, the base 2 has a pyramid structure, and the notches of the fixing groove 21 are opened at the top surface of the base 2, and the cross-sectional area of the notches of the fixing groove 21 is gradually reduced toward the bottom surface of the base 2. So set up, fixed slot 21 is the back taper structure to can adapt secondary optical prism 3's spotlight effect direction, make light orientation and radiate on the battery 4 of base 2 bottom. It can be understood that, since the fixing groove 21 has a cone structure, a plurality of inclined sidewalls of the fixing groove 21 are attached to 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 sidewalls of the secondary optical prism 3, the secondary optical prism 3 can be further fixed, so that the secondary optical prism 3 cannot rotate.
It should be noted that, in other embodiments, in order to adapt to the shape structure of the secondary optical prism 3, the fixing groove 21 may also be a cone structure, and therefore the technical solution is not limited to the structure of the fixing groove 21.
Furthermore, the limiting block 1 is provided with a light-transmitting groove 11.
Particularly, the middle part of the limiting block 1 is provided with a light transmission groove 11 penetrating through two end faces, so that light can be irradiated to the secondary optical prism 3 through the limiting block 1, and the secondary optical prism 3 can realize light condensation.
Further, the limiting block 1 is provided with a first blocking portion 12 located at the edge of the light transmission groove 11, and the first blocking portion 12 is used for abutting against the secondary optical prism 3 in the fixing groove 21.
Specifically, referring to fig. 2, in order to prevent the secondary optical prism 3 from separating from the fixing groove 21 of the base 2 and sliding out of the light transmission groove 11, the edge of the stopper 1 is provided with a first blocking portion 12 of a folded angle structure, and the first blocking portion 12 abuts against the top surface of the secondary optical prism 3, so as to block the secondary optical prism 3 from sliding out.
Further, the area of the first barrier 12 is less than or equal to 1% of the area of the light-transmitting groove 11.
Specifically, in order to improve the light efficiency, the first blocking part 12 should not block the top surface of the secondary optical prism 3 by an excessively large area. Therefore, the area of the first barrier 12 is less than 1% of the area of the light-transmitting groove 11 in the present embodiment. In addition, in other embodiments, the area of the first barrier 12 may be equal to 1% of the area of the light-transmitting groove 11.
Furthermore, the limiting block 1 is detachably connected with the base 2.
Specifically, in order to facilitate the installation of the secondary optical prism 3 into the fixing groove 21, the limiting block 1 and the base 2 of the light guide structure are detachably connected.
Further, base 2 has seted up spout 22, stopper 1 be provided with spout 22 assorted connecting portion 13, connecting portion 13 joint in spout 22, so that stopper 1 for base 2 slidable sets up.
Particularly, because connecting portion 13 joint of stopper 1 is in the spout 22 of base 2, stopper 1 is for 2 slidable of base to realize stopper 1 and 2 demountable assembly of base, be convenient for change secondary optical prism 3.
Further, the chute 22 includes a first notch and a second notch, the first notch and the second notch are respectively opened on two opposite end faces of the base 2, and the first notch extends towards the direction of the second notch.
Specifically, the base 2 is provided with two sliding grooves 22, and the two sliding grooves 22 are respectively opened on two opposite end faces of the base 2; and the first notch of spout 22, second notch are seted up respectively in another relative both ends face of base 2 equally, because quantity, the structure of connecting portion 13 of stopper 1 and the quantity, the structure phase-match of spout 22 of base 2 to first notch is towards the direction straight line extension setting of second notch, consequently the user can transversely insert stopper 1 from the one end of base 2 to run through the other end roll-off of base 2 from base 2.
Furthermore, the limiting block 1 and the base 2 are made of light-tight materials.
Specifically, in order to avoid the light generated when the secondary optical prism 3 deviates from the battery 4 and damage other parts, the base 2 and the limiting block 1 of the light guide structure are made of opaque materials, such as porcelain stone. The base 2 and the limiting block 1 made of the porcelain stone material can shield light rays of regions except the battery 4 due to light tightness, and the base 2 and the limiting block 1 can protect other parts.
Furthermore, the limiting block 1 and the base 2 are made of low heat conduction materials; or,
the limiting block 1 and the base 2 are made of porcelain stones.
Specifically, the limiting block 1 and the base 2 are made of low heat conduction materials, such as porcelain stone. The base 2 and the limiting block 1 made of the porcelain stone materials can isolate heat generated by the secondary optical prism 3, so that other parts are protected.
Referring to fig. 5, the present embodiment further includes a substrate 5, and the base 2 is connected to the substrate 5.
Specifically, the substrate 5 is used to connect the battery 4 and the electric wires associated with the battery 4, and the light generated by the secondary optical prism 3 in the base 2 can be irradiated to the surface of the battery 4 of the substrate 5. The bottom of the base 2 is provided with an electrode wire outlet groove 24, and an electric wire electrically connected with the battery can penetrate through the electrode wire outlet groove 24 and is communicated with external equipment.
Further, the base 2 is provided with a connecting hole 23, and the base 2 is bolted to the substrate 5 through the connecting hole 23. In this embodiment, the base 2 is provided with four connecting holes 23 respectively located at four ends of the base 2, and the substrate 5 is provided with corresponding through holes, so that the base 2 and the substrate 5 can be fixedly connected through bolts.
Further, a battery 4 is disposed on the substrate 5, a radiation opening 25 is disposed on a side surface of the base 2 close to the battery 4, and the notch of the fixing groove 21 extends toward the radiation opening 25. In the present embodiment, the radiation opening 25 is used to transmit light, so that the light generated by the secondary optical prism 3 passes through the radiation opening 25 and then irradiates the surface of the battery 4.
Further, a second stopper (not shown) is provided in the fixing groove 21, and the second stopper is used for abutting against the secondary optical prism 3 so that the end face of the secondary optical prism 3 forms a spacing distance of not less than 1mm with the surface of the battery 4. So set up, can effectively avoid secondary optical prism 3 and battery 4 surface direct contact, avoid secondary optical prism 3 to damage the surface of battery 4.
Further, the concentrating photovoltaic device further comprises a secondary optical prism 3, and 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. So set up, can avoid secondary optical prism 3 to appear the phenomenon of light loss, simultaneously, the inside wall surface of the fixed slot 21 of this embodiment is level and smooth, can avoid causing the damage to secondary optical prism 3, also can avoid the phenomenon of light absorption and light reflection loss simultaneously.
In summary, the light guide structure adopts the porcelain stone with extremely low heat conductivity coefficient, the secondary optical prism is detachably embedded on the substrate by the sliding groove, and meanwhile, the end face of the secondary optical prism is arranged to keep a short distance from the surface of the battery piece, so that the requirement of light transmission is met, and meanwhile, the secondary optical prism cannot damage the surface of the battery or an electric wire or a packaging body; in addition, because the base and the limiting block are made of opaque porcelain stones with low heat conductivity coefficients, light generated by the secondary optical prism cannot irradiate to the region outside the battery, and shielding protection is formed on parts outside the battery.
EXAMPLE III
Referring to fig. 6-9, the present embodiment is designed for a lens optical path with a focal length of 150mm and 160 × 160mm. This light-directing structure of thousand times spotlight photovoltaic device includes: secondary optical prism 3, stopper 1, base 2 and fixed bolster 54. The fixing bracket 54 is provided at the middle thereof with a fixing groove 21, and the slope of the fixing groove 21 is identical to the slope of the hypotenuse of the secondary optical prism 3. The fixed support 54 is a trapezoid, and the fixed support 54 is fixedly supported by four supporting plates 58 located on the bottom surface of the trapezoid.
The base 2 is an aluminum casting, the bottom surface of the base is square, and four top corners of the bottom surface are respectively provided with connecting holes 23; the center of the bottom surface is provided with a trapezoidal bulge with a hollow inner part. The front and the back of the trapezoid bulge are respectively provided with an arch channel 56.
The slope of the hypotenuse of the mounting bracket 54 corresponds to the slope of the hypotenuse of the base 2.
As shown in fig. 9, the secondary optical prism 3 is mounted in the fixing groove of the fixing bracket 54, and the base 2 covers the secondary optical prism 3 and the fixing bracket 54. When the secondary optical prism 3 is installed in the fixing groove, the distance between the secondary optical prism 3 and the surface of the battery below is less than 1 mm.
As shown in figure 8, the limiting block 1 is arranged at the top of the base 2, a square through hole is arranged in the middle of the limiting block 1, and chamfers are arranged at four vertex angles of the square through hole.
In the working process, the secondary optical prism 3 is placed in the fixing groove of the fixing support 54 for fixing, the secondary optical prism 3 and the fixing support 54 are covered in the fixing groove through the base 2, and the limiting block is arranged at the top of the base 2 to prevent the secondary optical prism 3 from sliding out of the fixing groove upwards. The base 2 is fixed on the heat dissipation device by screws to form a whole, and a battery panel is also arranged between the heat dissipation device and the prism; an arcuate channel 56 in the base 2 allows the wire to pass through the base 2.
Sunlight is optically focused through a Fresnel lens on a photovoltaic cell to generate energy, then the energy is irradiated into a secondary optical prism 3, light is uniformly reflected to the surface of the cell through the secondary optical prism 3, and the photovoltaic benefit is achieved through the high conversion rate of the three-junction III-V gallium arsenide cell to generate electric energy.
The concentrating photovoltaic power generation adopts a Fresnel lens to concentrate light, sunlight energy is concentrated on a gallium arsenide cell to finish the photovoltaic effect, but the optical axis is limited by the mechanical tracking precision and the problems because the light spot size design depends on the cell size due to the conditions of light spot design, processing mode, tracking precision, alternation between shade and clear, installation error, light spot movement or optical axis deviation generated when equipment is started and debugged, once the light spot falls outside the cell and cannot generate power, the deflected light rays are uniformly and effectively guided into the surface of the cell below through the design of the upside-down wide and the downside-narrow inverted prism and the total reflection of the light rays, and the photovoltaic effect is finished to generate electric energy.
Through taking above-mentioned structural design, secondary optical prism 3's axis deviation scope is increased to 25 by 15, and light guide area has increased 1.5 times, and light causes reflection loss because of the deviation and can reduce. Wherein, the precision of the prism is required to be within the range of +/-0.1 mm, and the surface of the prism is smooth and has no damage, and the prism has no scratch and corner defect.
The light receiving size of the gallium arsenide battery is designed to be 5 x 5mm, when the height of the secondary optical prism is 1.3 times of the light receiving size of the upper surface of the secondary optical prism, the total reflection can be achieved, the most uniform and optimal effect can be achieved at the light receiving position of the surface of the battery, the energy loss and the burning of accessory parts can be caused due to no energy leakage, the precision of precision tracking can be properly reduced, and the development cost is reduced.
In summary, the present embodiment provides a light guide structure of a thousand-fold concentrating photovoltaic device, which can solve the problem that the light spot generates a movement deviation in the processes of designing, processing, tracking precision, alternation between cloudy and sunny, installation error, starting of equipment, and the like of the conventional light spot; and meanwhile, the secondary optical prism is effectively prevented from contacting the surface of the battery, so that the battery is prevented from being damaged.
Example four
Referring to fig. 10-13, the kilogramme concentrating photovoltaic device of the present embodiment includes four battery modules. The heat dissipation module of the thousand-time concentrating photovoltaic device comprises a module box body 61 and a heat radiator; the module box body 61 is a metal plate bending or punch forming box body; the bottom is provided with four metal cylinders 62 formed by downward stamping; the module box body is combined with the metal cylinder through a sealing gasket and a fastening screw. The heat sink is mounted to the bottom of the metal cylinder 62. The module box body 61 is a rectangular aluminum metal box body; the metal cylinders 62 are spaced apart from each other.
The radiator is a fin radiator 63, and the fin radiator 63 and the metal cylinder are fastened by screws. A sealing ring is arranged on the periphery of the joint of the metal cylinder 62 and the fin radiator 63.
As shown in fig. 12, the bottom of the metal cylinder is also provided with power generation modules 64 respectively, and the power generation modules are connected with the fin radiator 63.
In the working process, a Fresnel optical lens is mounted at the top of the module box body 61, sunlight irradiates the Fresnel optical lens to enter the module box body 61, and the power generation module 64 comprises a secondary optical prism module and a battery module; the sunlight that gets into in the module box 61 makes the facula evenly fall on the battery module through the refraction of secondary optical prism, and the battery module is installed on radiator 3 through the welded mode.
The heat generated by power generation is dissipated by using the fin radiator 63, and the heat source is taken away by using the indirect heat dissipation mode of the shell of the module box body 61; four metal cylinders 62 formed by downward stamping are arranged at the bottom of the module box body 61, and the fin radiators 63 are arranged at the bottom of the metal cylinders 62, so that the fin radiators 63 are respectively and independently kept at certain distances from the box body, the air fluidity is increased, and a space is reserved for forming hot air convection while heat is dissipated. In the power generation process, hot air can be smoothly discharged from the upper part of the metal cylinder, so that the concentrated thermal field is prevented from reducing the efficiency of the heat dissipation module. Simultaneously, the design of recessed in the module box 61 because of the change of focus size to the condition of spotlight photovoltaic facula firing wire rod that produces behind the focus also has certain guard action.
As shown in fig. 13, in another embodiment, the kilogramme photovoltaic device is provided with sixteen cell modules.
In summary, the present embodiment provides a heat dissipation module of a concentrating photovoltaic device, in which a battery mounted on a module box body is protruded to a certain height in a stamping manner, so that a certain distance is maintained between a heat sink and the module box body, and a space is still available for forming hot air convection while heat dissipation is performed; the efficiency of the heat dissipation module is prevented from being reduced due to the concentration of a dense thermal field. The design of recessed in the module box because of the change of focus size to the condition of spotlight photovoltaic because of the facula firing wire rod that produces behind the focus also has certain guard action.
The above description is only an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, which are within the spirit of the present invention, are included in the scope of the present invention.
Claims (15)
1. A thousand-fold concentrating photovoltaic device, comprising:
the light guide structure comprises a base and a limiting block, the limiting block is connected to one side of the base, a fixing groove for accommodating the secondary optical prism is formed in one end face of the base, the limiting block is connected to a notch of the fixing groove, and one side wall of the limiting block and the inner side wall of the fixing groove are abutted against the outer side wall of the secondary optical prism so that the secondary optical prism is fixed;
the heat dissipation module comprises a module box body and a heat radiator, a plurality of metal cylinders formed by downward stamping are arranged at the bottom of the module box body, the base is connected into the metal cylinders, and the heat radiator is installed at the bottom of the metal cylinders.
2. The kilo-concentrating photovoltaic device according to claim 1, wherein the cross-sectional area of the notch of the fixing groove is gradually reduced toward the other end face of the base; or,
the fixing groove is of a cone structure.
3. The thousand-fold concentrating photovoltaic device according to claim 1, wherein the limiting block is provided with a light-transmitting groove, the limiting block is provided with a first blocking portion located at the edge of the light-transmitting groove, and the first blocking portion is used for abutting against the secondary optical prism in the fixing groove.
4. The thousand-fold concentrating photovoltaic device according to claim 1, wherein the base is provided with a chute, the limiting block is provided with a connecting part matched with the chute, and the connecting part is clamped in the chute so that the limiting block can be slidably arranged relative to the base.
5. The kilo-concentrating photovoltaic device according to claim 4, wherein the sliding groove comprises a first notch and a second notch, the first notch and the second notch are respectively formed in two opposite end faces of the base, and the first notch extends linearly in the direction of the second notch.
6. The concentrated photovoltaic device according to claim 1, wherein the modular box is a metal box made of aluminum with a chamfered shape, and the top surface of the metal box is a non-closed surface.
7. The kilo-concentrating photovoltaic device according to claim 1, wherein the metal cylinders are rectangular and arranged at the bottom of the module box body along the transverse direction and the longitudinal direction, and the metal cylinders are spaced at the same distance.
8. The kilo-concentrating photovoltaic device according to claim 7, wherein the metal cylinder is in an inverted cone shape, and the diameter of the joint of the metal cylinder and the module box is larger than that of the installation position of the radiator.
9. The kiloconcentrating photovoltaic device according to claim 1, wherein the heat sink is a fin heat sink, the maximum extent of the fin heat sink being the size of the lens.
10. The kilo-concentrating photovoltaic device according to claim 9, wherein a power generation module is further disposed at the bottom of the metal cylinder, and the power generation module is connected to the fin radiator.
11. The kilo-concentrating photovoltaic device according to claim 1, wherein the optical module further comprises a fixing support and a secondary optical prism, the fixing support is mounted inside the base, the fixing groove is formed in the middle of the fixing support, the upper portion of the secondary optical prism is connected with the limiting block, and the lower portion of the secondary optical prism is arranged between the fixing support and the bottom plate of the base in a hollow mode.
12. The kilo-concentrating photovoltaic device according to claim 11, wherein the secondary optical prism is an inverted trapezoidal prism, and the slope of the fixing groove is identical to the slope of the hypotenuse of the secondary optical prism.
13. The thousand-fold concentrating photovoltaic device according to claim 11, wherein the base is an aluminum casting, the bottom surface of the base is square, and four top corners of the bottom surface are respectively provided with a connecting hole; the bottom surface center department be provided with inside hollow trapezoidal arch, trapezoidal arch channel is provided with respectively around protruding.
14. The kilo-concentrating photovoltaic device according to claim 11, wherein the secondary optical prism is spaced from the surface of the underlying cell by less than 1mm when the secondary optical prism is mounted in the fixture groove.
15. The thousand-fold concentrating photovoltaic device according to claim 11, wherein the limiting block is installed at the top of the base, a square through hole is formed in the middle of the limiting block, and chamfers are arranged at four top corners of the square through hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211378408.3A CN115799371A (en) | 2022-11-04 | 2022-11-04 | Thousand-time concentrating photovoltaic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211378408.3A CN115799371A (en) | 2022-11-04 | 2022-11-04 | Thousand-time concentrating photovoltaic device |
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| CN115799371A true CN115799371A (en) | 2023-03-14 |
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| CN202211378408.3A Pending CN115799371A (en) | 2022-11-04 | 2022-11-04 | Thousand-time concentrating photovoltaic device |
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