Light injection device
By designing a light injection device for photovoltaic modules and using sunlight to inject light, the problem of passivation layer failure of outdoor photovoltaic modules is solved, and the effect of improving photoelectric conversion efficiency and reducing costs is achieved.
Patent Information
- Application Number
- CN202421733937.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-22
AI Technical Summary
Existing photovoltaic modules are prone to passivation layer failure in outdoor low temperature and light environments, resulting in a decrease in photoelectric conversion efficiency and thus reducing power generation capacity. In addition, existing photoinjection equipment needs to be disassembled and returned to the factory for processing, which increases time and cost.
A light injection device is designed, including a light-concentrating mechanism, a light-guiding optical fiber and a light-out mechanism, and light-injection is used to use sunlight to restore the effect of the passivation layer and improve the photoelectric conversion efficiency of the photovoltaic module.
Through the use of light injection devices, the passivation layer of the photovoltaic module can be directly restored outdoors, improving power generation efficiency, reducing costs, and avoiding the cumbersome process of component disassembly and transportation.
Smart Images
Figure CN222966940U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic technology, and particularly to a light injection device. Background Art
[0002] In a solar cell, non-equilibrium carriers are generated under illumination. When the illumination is removed, due to the internal action of the semiconductor, the non-equilibrium carriers will gradually disappear, causing electrons and holes to disappear in pairs. This process is called the recombination of non-equilibrium carriers. The time it takes for non-equilibrium carriers to be completely recombined is called the minority carrier lifetime. The power generation efficiency of a solar cell is positively correlated with the minority carrier lifetime. The longer the minority carrier lifetime (i.e., the lower the probability of minority carrier recombination), the higher the efficiency of the solar cell. The reason for minority carrier recombination is that there are "recombination centers" in the semiconductor. Recombination centers are formed by impurities and defects in the semiconductor. Defects (such as lattice vacancies and dangling bonds) can capture carriers, leading to the recombination of electron-hole pairs, thereby reducing the efficiency of the solar cell.
[0003] In order to reduce the number of recombination centers and improve the efficiency of the solar cell, it is necessary to "passivate" the solar cell. Passivation is divided into surface passivation and field passivation. Surface passivation is to grow a surface layer on the surface of the cell, enabling atoms to have enough time and energy to reach the optimal energy level, thereby saturating the dangling bonds on the cell surface. Field passivation is to deposit a hydrogen-rich dielectric layer on the surface of the cell, and the free hydrogen released during the sintering process occupies the vacancies of the dangling bonds, thereby achieving a passivation effect. However, the passivation layer has instability, and hydrogen ions may detach from the dangling bonds, causing the passivation to fail. Especially in outdoor low-temperature and light environments, passivation failure is more likely to occur, resulting in a significant decrease in the photoelectric conversion efficiency of the solar cell, and further causing the power generation capacity of the photovoltaic module in the outdoor environment to decrease significantly over time, severely reducing the power generation of the photovoltaic power station.
[0004] In order to restore the effect of the passivation layer and improve the photoelectric conversion efficiency of the cell, the solar cell can be subjected to light injection, electrical injection, or thermal degradation treatment. Among them, light injection is to irradiate the photovoltaic cell with a high-intensity light source for a certain period of time. Electrical injection is to pass a current of 1A to several A through the photovoltaic cell. Thermal annealing is to raise the temperature of the photovoltaic cell to a certain level and then let it cool naturally. The above three methods can all make hydrogen atoms migrate back to the defect positions and recombine with the defects, thereby restoring the effect of the passivation layer and improving the photoelectric conversion efficiency of the cell. However, currently, the economically viable and batch-production light injection equipment, electrical injection equipment, or annealing equipment are all deployed on the production lines of manufacturing factories. When the photovoltaic module has been shipped and installed in an outdoor power station, if light injection, electrical injection, or thermal degradation needs to be carried out again, the photovoltaic module must be disassembled from the power station and returned to the factory. This not only delays the power generation of the power station but also increases the additional costs of disassembly, installation, and transportation of the photovoltaic module. Summary of the Invention
[0005] Based on this, it is necessary to provide a light injection device for how to restore the purification layer of photovoltaic modules outdoors and reduce the time and cost of additional disassembly, transportation of photovoltaic modules.
[0006] A light injection device includes a light condensing mechanism, a light guiding optical fiber, and a light emitting mechanism. Among them, the light condensing mechanism is used to condense sunlight, the light guiding optical fiber connects the light condensing mechanism and the light emitting mechanism, the light guiding optical fiber is used to transmit the sunlight condensed by the light condensing mechanism to the light emitting mechanism, and the light emitting mechanism is used to be placed on the photovoltaic module and emit the condensed sunlight to the photovoltaic module in the form of parallel light.
[0007] The technical solution will be further described below:
[0008] In one embodiment, the light condensing mechanism includes a support frame and at least one light collector. The light collector is arranged on the support frame, and the light collector is connected to the light guiding optical fiber. The light collector is used to condense the sunlight and input the sunlight into the light guiding optical fiber.
[0009] In one embodiment, the support frame includes a column, a mounting seat, and a two-axis tracking assembly. The light collector is arranged on the mounting seat. The mounting seat is rotatably arranged on the column. The two-axis tracking assembly is connected to the mounting seat. The two-axis tracking assembly is used to drive the mounting seat to rotate around a first direction axis and a second direction axis so that the light collector tracks the sun's trajectory, where the first direction axis and the second direction axis intersect.
[0010] In one embodiment, the light collector includes a condenser lens and an optical coupler. The condenser lens is used to condense sunlight, and the optical coupler is arranged at the focus of the condenser lens and is connected to the light guiding optical fiber.
[0011] In one embodiment, the number of the light condensing mechanisms is multiple, and the light condensing mechanisms are arranged at intervals; and / or, each light condensing mechanism includes multiple light collectors, and the multiple light collectors are arranged at intervals on the support frame.
[0012] In one embodiment, the light emitting mechanism includes a mounting rack and at least one light emitter arranged on the mounting rack. Each light emitter is connected to multiple light collectors through the light guiding optical fiber. The light emitter is used to emit the condensed sunlight to the photovoltaic module in the form of parallel light.
[0013] In one embodiment, the number of the light emitters is multiple, and the multiple light emitters are arranged in an array on the mounting rack.
[0014] In one embodiment, the light output mechanism further includes a roller, which is rotatably installed on the mounting bracket and is used to drive the mounting bracket to move along the arrangement direction of the photovoltaic modules.
[0015] In one embodiment, the light injection device includes a moving platform, and the light condensing mechanism is arranged on the moving platform.
[0016] In one embodiment, the moving platform is further provided with a lifting mechanism, which is used to place the light output mechanism on the photovoltaic module and remove the light output mechanism from the photovoltaic module.
[0017] The above-mentioned light injection device can collect and focus sunlight through the light condensing mechanism, and can transmit the concentrated sunlight to the light output mechanism through the light guiding optical fiber. The light output mechanism then emits the concentrated sunlight to the photovoltaic module in the form of parallel light, so as to realize light injection into the photovoltaic module, restore the effect of the passivation layer of the photovoltaic module, and improve the photoelectric conversion efficiency of the battery. And compared with the traditional light injection equipment on the production line, the light injection device of the present application does not require expensive high-intensity artificial light sources. The light condensing mechanism can directly use outdoor sunlight as the light source, greatly reducing the cost, and eliminating the artificial light source, making the structure of the light injection device simpler, facilitating mobile use outdoors, without the need to disassemble, transport, etc. the photovoltaic module, and not being restricted by the region, and can be reused in any area of the power station or any power station, greatly reducing the cost and improving the economy. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.
[0019] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of each component are only drawn exemplarily in the drawings and not necessarily drawn according to the actual scale. In the drawings:
[0021] Figure 1 It is a schematic structural diagram of a light injection device according to an embodiment.
[0022] Figure 2 It is a schematic structural diagram of a daylighting device according to an embodiment.
[0023] Figure 3 Schematic diagram of the light - collecting mechanism tracking the sun's trajectory in an embodiment.
[0024] Figure 4 Schematic diagram of the cooperation between the light - emitting mechanism and the photovoltaic module in an embodiment.
[0025] Figure 5 Schematic diagram of the cooperation between the light - collecting mechanism and the mobile platform in an embodiment.
[0026] Description of reference numerals:
[0027] 10. Light - collecting mechanism; 11. Light - collector; 111. Condensing lens; 112. Optical coupler; 12. Support frame; 121. Column; 122. Mounting seat; 20. Light - guiding optical fiber; 30. Light - emitting mechanism; 31. Mounting frame; 32. Light - emitter; 33. Roller; 41. Mobile platform; 42. Hoisting mechanism; 50. Photovoltaic module. Detailed implementation manners
[0028] To make the above - mentioned objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0029] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.
[0030] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if there is a term "plural", the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0031] In this application, unless otherwise clearly specified or limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0032] In this application, unless otherwise clearly specified or limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.
[0033] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.
[0034] An embodiment of this application provides an optical injection device for performing optical injection treatment on an outdoor photovoltaic module 50 to restore the effect of the passivation layer of the photovoltaic module 50 and improve the photoelectric conversion efficiency of the battery. Refer to Figure 1 , specifically, in one embodiment, the optical injection device includes a light condensing mechanism 10, a light guiding optical fiber 20, and a light emitting mechanism 30. Among them, the light condensing mechanism 10 is used to condense sunlight, the light guiding optical fiber 20 is connected to the light condensing mechanism 10 and the light emitting mechanism 30, the light guiding optical fiber 20 is used to transmit the sunlight condensed by the light condensing mechanism 10 to the light emitting mechanism 30, the light emitting mechanism 30 is used to be placed on the photovoltaic module 50, and the light emitting mechanism 30 is used to emit the condensed sunlight to the photovoltaic module 50 in the form of parallel light.
[0035] The above-mentioned light injection device can collect and focus sunlight through the light condensing mechanism 10, transmit the concentrated sunlight to the light output mechanism 30 through the light guiding optical fiber 20, and the light output mechanism 30 then emits the concentrated sunlight to the photovoltaic module 50 in the form of parallel light, so as to realize light injection into the photovoltaic module 50, restore the effect of the passivation layer of the photovoltaic module 50, and improve the photoelectric conversion efficiency of the battery. And compared with the traditional light injection equipment set on the production line, the light injection device of the present application does not require expensive high-intensity artificial light sources, and can directly use outdoor sunlight as the light source through the light condensing mechanism 10, greatly reducing the cost. Moreover, eliminating the artificial light source makes the structure of the light injection device simpler, facilitating mobile use outdoors, without the need to disassemble or transport the photovoltaic module 50, etc., and is not restricted by the region, and can be reused in any area of the power station or any power station, greatly reducing the cost and improving the economy.
[0036] See Figure 1 , in one embodiment, the light condensing mechanism 10 includes a support frame 12 and at least one light collector 11. The light collector 11 is arranged on the support frame 12, and the light collector 11 is connected to the light guiding optical fiber 20. The light collector 11 is used to collect sunlight and input the sunlight into the light guiding optical fiber 20. By supporting the light collector 11 through the support frame 12, the height of the light collector 11 can be raised, avoiding the light collector 11 being blocked by the surrounding environment and ensuring the efficiency of the light collector 11 in collecting sunlight.
[0037] Combined with Figure 3 , in one embodiment, the support frame 12 includes a column 121, a mounting base 122 and a biaxial tracking component (not shown). The light collector 11 is arranged on the mounting base 122. The mounting base 122 is rotatably arranged on the column 121. The biaxial tracking component is connected to the mounting base 122. The biaxial tracking component is used to drive the mounting base 122 to rotate around the first direction axis and the second direction axis, so that the light collector 11 tracks the sun's trajectory movement, wherein the first direction axis and the second direction axis are intersectingly arranged. Exemplarily, the first direction axis can be the horizontal X axis, and the second direction axis is the horizontal Y axis. By driving the mounting base 122 to rotate around the first direction axis and the second direction axis, the light collector 11 can be made to track the sun's trajectory movement, thereby ensuring that the light collector 11 always faces the sun and further improving the light condensing effect of the light collector 11.
[0038] See Figure 2 , optionally, in one embodiment, the light collector 11 includes a condenser lens 111 and an optical coupler 112. The condenser lens 111 is used to collect sunlight. The optical coupler 112 is arranged at the focus of the condenser lens 111 and is connected to the light guiding optical fiber 20 to introduce the sunlight collected by the light collector 11 into the light guiding optical fiber 20. Exemplarily, the condenser lens 111 can be a Fresnel lens or a parabolic mirror, etc.
[0039] Optionally, in one embodiment, the number of the light condensing mechanisms 10 is multiple, and the light condensing mechanisms 10 are arranged at intervals. Exemplarily, the number of the light condensing mechanisms 10 can be two, three, four, five or more. Further, each light condensing mechanism 10 includes a plurality of light collectors 11, and the plurality of light collectors 11 are arranged at intervals on the support frame 12. Exemplarily, two, three, four, five or more light collectors 11 can be arranged on each support frame 12. In this way, the number of the light collectors 11 is increased, and the light condensing effect is improved.
[0040] See Figure 4 , in one embodiment, the light emitting mechanism 30 includes a mounting frame 31 and at least one light emitter 32 arranged on the mounting frame 31. Each light emitter 32 is connected to a plurality of light collectors 11 through a light guiding optical fiber 20, and the light emitter 32 is configured to emit the concentrated sunlight in a parallel light manner to the photovoltaic module 50. Exemplarily, the light emitter 32 includes a light emitting mirror, and the light emitting mirror can re-diverge the sunlight concentrated in the light guiding optical fiber 20 to form parallel light.
[0041] Further, each light emitter 32 can be respectively connected to a plurality of light collectors 11 through a plurality of light guiding optical fibers 20. Exemplarily, one light emitter 32 can be connected to two, three, four, five, six or more light collectors 11. In this way, sunlight with an area several times that of the light collectors 11 is irradiated onto one battery cell through one light emitter 32, so that the sunlight irradiance obtained by each battery cell reaches the condition of light injection. For example, assuming that the irradiation intensity of sunlight is G, then the sunlight irradiance G obtained by each solar cell cell :
[0042] G cell =N*G
[0043] where N is the number of the light collectors 11, and the standard sunlight intensity is 1000W / m 2 , so only by increasing N, the battery can obtain an irradiance several times that of the standard sunlight intensity and reach the condition of light injection.
[0044] Further, by connecting a plurality of light collectors 11 through one light emitter 32, the effect of partial thermal annealing can also be achieved, thereby further improving the recovery effect of the passivation layer of the photovoltaic module 50. Specifically, after the solar cell in the power generation state receives sunlight irradiation, a part of the irradiation energy is converted into electric energy, and the other part is converted into heat. According to the law of conservation of energy, the higher the received irradiation, the higher the converted electric energy and heat. The conversion formula of the heat of the solar cell is:
[0045]
[0046] where, T cell : the temperature of the solar cell; T m: Ambient temperature; G cell : Irradiance received by the solar cell; α: Irradiance absorption coefficient, generally about 0.9; η: Photovoltaic conversion efficiency of the solar cell, which is 0 when the photovoltaic module circuit needs to be disconnected during light injection; U0: Heat dissipation coefficient, generally 29.
[0047] Assume the ambient temperature is 20°C and G cell equals 6000 W / m 2 , the temperature of the solar cell can reach nearly 200°C. That is to say, if a light emitter 32 is connected to six light collectors 11, when the direct sunlight reaches 1000 W / m 2 , the solar cell can reach the optimal thermal annealing temperature.
[0048] See Figure 1 , optionally, in an embodiment, the number of light emitters 32 is multiple, and the multiple light emitters 32 are arranged in an array on the mounting frame 31. Exemplarily, one light emitter 32 corresponds to one cell of the photovoltaic module 50. Thus, through one light injection mechanism 30, light injection can be simultaneously performed on multiple cells of the photovoltaic module 50, improving the light injection efficiency.
[0049] See Figure 4 , the light injection mechanism 30 further includes rollers 33, and the rollers 33 are rotatably mounted on the mounting frame 31 and roll to drive the mounting frame 31 to move along the arrangement direction of the photovoltaic modules 50. Specifically, in a power station, multiple photovoltaic modules 50 are usually installed and arranged in an array. By installing rollers 33 on the mounting frame 31 of the light injection mechanism 30, the light injection mechanism 30 can be moved more conveniently and labor - savingly by means of the rollers 33, so that the light injection mechanism 30 can perform light injection on each photovoltaic module 50 in turn, improving the efficiency. Further, the number of rollers 33 is multiple, and each roller 33 is respectively arranged on both sides of the mounting frame 31, thus improving the moving stability of the light injection mechanism 30.
[0050] See Figure 5 , in an embodiment, the light injection device further includes a mobile platform 41, and the light - condensing mechanism 10 is arranged on the mobile platform 41. Through the mobile platform 41, the light - condensing mechanism 10 and the light injection mechanism 30 can be transported to various areas of the power station. Thus, with one set of light injection device, light injection can be performed on the photovoltaic modules 50 in various areas of the power station. Exemplarily, the mobile platform 41 can be on land, such as a platform trailer, or on water, such as a tugboat, etc.
[0051] Optionally, in one embodiment, the mobile platform 41 is further provided with a lifting mechanism 42, which is used to place the light-emitting mechanism 30 on the photovoltaic module 50 and remove the light-emitting mechanism 30 from the photovoltaic module 50, thereby saving manual handling and improving the light injection efficiency. It should be noted that, in other embodiments, the condensing mechanism 10 can also be directly integrated onto the light-emitting mechanism 30, and the light-emitting mechanism 30 is then provided with an automatic walking mechanism, thus eliminating the mobile platform 41.
[0052] In one embodiment, the entire working process of the light injection device is as follows:
[0053] S110: The light collector 11 of the condensing mechanism 10 rotates to an angle under the drive of the two-axis tracking assembly to align the light collector 11 with the direct sunlight.
[0054] S120: After the direct sunlight enters the light collector 11, it is focused by the condenser lens 111 in the light collector 11 and enters the light guide fiber 20 through the optical coupler 112.
[0055] S130: The light is transmitted in the light guide fiber 20 and reaches the light emitter 32 connected to the other end of the light guide fiber 20, and finally irradiates out from the light emitter 32. Specifically, according to the principle of the optical fiber light guiding system, the parallel light is gathered by the condenser lens 111 and then enters the light guide fiber 20. The light is continuously totally reflected in the light guide fiber 20 and finally reaches the light emitter 32 at the other end. An output mirror is arranged in the light emitter 32, and the light is scattered by the output mirror into parallel light and emitted.
[0056] S140: Cover the light-emitting mechanism 30 on the front of the photovoltaic module 50 so that the light emitted from the light-emitting mechanism 30 directly irradiates onto the battery cells, and maintain for a period of time T, generally 1 minute.
[0057] S150: After completing the light injection for one photovoltaic module 50, the lifting mechanism 42 on the mobile platform 41 drags the light-emitting mechanism 30 to move on the photovoltaic array, so that the light-emitting mechanism 30 moves to the next photovoltaic module 50, and step S140 is repeated.
[0058] S160: When the next photovoltaic module 50 that needs light injection is beyond the range of the lifting mechanism 42, the lifting mechanism 42 lifts the light-emitting mechanism 30 and places it back on the mobile platform 41. The mobile platform 41 travels to the next appropriate position, and then steps S140 and S150 are repeated.
[0059] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.
[0060] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
Claims
1. A light injection device, characterized in that: The invention comprises a light collecting mechanism (10), a light guiding optical fiber (20) and a light emitting mechanism (30), wherein the light collecting mechanism (10) is used to collect sunlight, the light guiding optical fiber (20) is connected to the light collecting mechanism (10) and the light emitting mechanism (30), the light guiding optical fiber (20) is used to transmit the sunlight collected by the light collecting mechanism (10) to the light emitting mechanism (30), and the light emitting mechanism (30) is used to be placed on a photovoltaic module (50) and emit the collected sunlight in the form of parallel light to the photovoltaic module (50).
2. The light injection device according to claim 1, characterized in that: The light collecting mechanism (10) comprises a support frame (12) and at least one light collector (11), wherein the light collector (11) is arranged on the support frame (12), the light collector (11) is connected to the light-guiding optical fiber (20), and the light collector (11) is used to collect the sunlight and input the sunlight into the light-guiding optical fiber (20).
3. The light injection device according to claim 2, characterized in that: The support frame (12) comprises a column (121), a mounting seat (122) and a dual-axis tracking assembly, the light collector (11) is arranged on the mounting seat (122), the mounting seat (122) is rotatably arranged on the column (121), the dual-axis tracking assembly is connected to the mounting seat (122), and the dual-axis tracking assembly is used to drive the mounting seat (122) to rotate around a first direction axis and a second direction axis so that the light collector (11) tracks the movement of the sun's trajectory, wherein the first direction axis and the second direction axis are arranged to intersect.
4. The light injection device according to claim 2, characterized in that: The light collector (11) comprises a condenser (111) and an optical coupler (112); the condenser (111) is used to collect sunlight; the optical coupler (112) is arranged at the focus of the condenser (111) and is connected to the light-guiding optical fiber (20).
5. The light injection device according to claim 2, characterized in that: The number of the light-gathering mechanisms (10) is plural, and the light-gathering mechanisms (10) are arranged at intervals; and / or each of the light-gathering mechanisms (10) comprises a plurality of light-collecting devices (11), and the plurality of light-collecting devices (11) are arranged at intervals on the support frame (12).
6. The light injection device according to claim 2, characterized in that: The light emitting mechanism (30) comprises a mounting frame (31) and at least one light emitter (32) arranged on the mounting frame (31), each of the light emitters (32) being connected to a plurality of light collectors (11) via the light-guiding optical fiber (20), and the light emitter (32) being used to emit the concentrated sunlight in the form of parallel light toward the photovoltaic assembly (50).
7. The light injection device according to claim 6, characterized in that: There are a plurality of light emitters (32), and the plurality of light emitters (32) are arranged in an array on the mounting frame (31).
8. The light injection device according to claim 6, characterized in that: The light emitting mechanism (30) further comprises a roller (33), which is rotatably mounted on the mounting frame (31) and is used to drive the mounting frame (31) to move along the arrangement direction of the photovoltaic components (50) by rolling.
9. The light injection device according to any one of claims 1 to 8, characterized in that: The light injection device comprises a moving platform (41), and the light focusing mechanism (10) is arranged on the moving platform (41).
10. The light injection device according to claim 9, characterized in that: The mobile platform (41) is further provided with a lifting mechanism (42), and the lifting mechanism (42) is used to place the light emitting mechanism (30) on the photovoltaic assembly (50) and to remove the light emitting mechanism (30) from the photovoltaic assembly (50).