Solar cell light injection module

Abstract

The invention discloses a solar cell light injection module which comprises an optical module, the optical module comprises a plurality of light source devices, and the light-emitting front faces of the light source devices are arranged in the direction of a solar cell. The light-emitting front faces of the light source devices are sequentially arranged in the transmission direction of the transmission device or in the direction perpendicular to the transmission direction of the transmission device to form at least one set of first contour faces, the middles of the first contour faces are concave in the direction away from the solar cell, and light beams emitted by the light source devices on the first contour faces enter the solar cell to form a light beam. The width of the first contour surface is larger than that of the light beam along the direction of the first contour surface. According to the solar cell light injection module, the light beams emitted by the light source devices at different positions on the first contour surface can be superposed, so that the light beams emitted by the light source devices can be converged into a high-light-intensity light band which is emitted to the surface of the solar cell, and even if the light intensity of the light emitted to the surface of the solar cell is improved, the light intensity is reduced; therefore, the conversion efficiency of the solar cell is improved.

Description

[0001] This invention application is a divisional application of the parent application "Solar cell light injection module". The application date of the parent application is March 5, 2021, and the application number of the parent application is 202110243455.6. Technical Field

[0002] The invention relates to the technical field of solar cell production, and in particular to a solar cell light injection module. Background Art

[0003] With the development of solar cell technology, the development of high-efficiency cells has received more and more attention. Heterojunction cells have attracted much attention from researchers at home and abroad due to their low process temperature, high conversion efficiency, good cell stability and low temperature coefficient.

[0004] In the existing technology, the mass production efficiency of ultra-high-efficiency heterojunction cells has reached 23.27%. After testing, the front power of 60 bifacial modules in mass production reached 332.6W. Due to the characteristics of bifacial power generation, the back of the module can generate 10%-30% additional power generation in scenes such as grass, concrete, snow, and reflective cloth. The power temperature coefficient is as low as -0.27% / ℃. Compared with ordinary polycrystalline modules, heterojunction modules can recover 34% of power generation losses at an operating temperature of 75℃.

[0005] Heterojunction batteries have the above technical advantages and have gradually developed into a high-efficiency mass production technology after PERC batteries. However, due to the limitations of process conditions, the conversion efficiency of heterojunction batteries has reached its limit and it is difficult to make further breakthroughs. How to break through the existing technology and further improve the mass production efficiency of heterojunction batteries can further accelerate the large-scale industrialization process of heterojunction batteries. Summary of the invention

[0006] The purpose of the present invention is to provide a solar cell light injection module in which a light beam emitted by a light source device can be converged onto a solar cell to enhance the light intensity and improve the conversion efficiency of the solar cell in order to solve the problems in the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A solar cell light injection module comprises a frame and an optical module arranged on the frame, wherein the optical module comprises a plurality of independently controllable light source devices, wherein the light-emitting front faces of the light source devices are arranged toward the direction of the solar cell, and the light-emitting front faces of the plurality of light source devices are sequentially arranged along a transmission direction of a transmission device or along a transmission direction perpendicular to the transmission direction of the transmission device to form at least one group of first contour surfaces whose middle portions are concave away from the solar cell, and light beams emitted by each of the light source devices located on the first contour surface are incident on the solar cell to form a light beam, and along the direction of the first contour surface, the width of the first contour surface is greater than the width of the light beam.

[0009] Preferably, the light source device is a light bead, and each of the light beads is arranged in a matrix along a transmission direction of the transmission device and along a transmission direction perpendicular to the transmission device.

[0010] Furthermore, along the direction of the first contour surface, the tangent lines of the light beads in the same column / row at the position of the first contour surface extend along different straight line directions.

[0011] Furthermore, along the direction of the first contour surface, tangent lines of a plurality of the light beads arranged continuously in the same column / row at the positions of the first contour surface extend along the same straight line direction.

[0012] Preferably, the light source device is a light strip, and a plurality of the light strips are sequentially arranged along the transmission direction of the transmission device to form at least one group of the first contour surfaces, and each of the light strips extends along a transmission direction perpendicular to the transmission device; or a plurality of the light strips are sequentially arranged along the transmission direction perpendicular to the transmission device to form at least one group of the first contour surfaces, and each of the light strips extends along the transmission direction of the transmission device.

[0013] Preferably, the optical module also includes a light source box body and a fixing plate arranged in the light source box body, the fixing plate having a mounting surface for mounting the light source device, the mounting surface being a second contour surface extending along the transmission direction of the transmission device or along a second contour surface perpendicular to the transmission direction of the transmission device, and the second contour surface corresponds to the first contour surface.

[0014] Preferably, the optical module extends along a transmission direction perpendicular to the transmission device, and the light-emitting front sides of the multiple light source devices are sequentially arranged along the transmission direction of the transmission device to form a group of the first contour surfaces. Along the direction perpendicular to the transmission direction of the transmission device, a column of solar cells is provided on the transmission device or multiple columns of solar cells are arranged at intervals, or the transmission device is provided with multiple columns side by side, and each column of the transmission device transmits a column of solar cells.

[0015] Preferably, a row of solar cells is provided on the transmission device along a direction perpendicular to the transmission direction of the transmission device, the optical module extends along the transmission direction of the transmission device, and the light-emitting front sides of a plurality of the light source devices are sequentially arranged along the transmission direction perpendicular to the transmission device to form a group of the first contour surfaces.

[0016] Preferably, a plurality of columns of solar cells are provided on the transmission device along a direction perpendicular to the transmission direction of the transmission device, or a plurality of columns of solar cells are arranged side by side along the transmission direction perpendicular to the transmission device, and each column of the transmission device transmits a column of solar cells, the optical module extends along the transmission direction of the transmission device, and the light-emitting front sides of a plurality of the light source devices are sequentially arranged along the transmission direction perpendicular to the transmission device to form a plurality of groups of the first contour surfaces, and each group of the first contour surfaces corresponds to a column of solar cells.

[0017] Preferably, the light injection module also includes a cooling device for cooling the solar cells located on the transmission device, and the cooling device includes an air blowing device arranged on the frame, and the exhaust port of the air blowing device is located between the light source device and the transmission device. The exhaust direction of the air blowing device is set toward the surface of the solar cell, and the air intake volume of the air blowing device can be adjusted.

[0018] Furthermore, the air blowing device is a wind knife device, the exhaust port of the wind knife device is arranged toward the solar cell, and the air inlet of the wind knife device is connected to the air source device.

[0019] Furthermore, along a direction perpendicular to the transmission direction of the transmission device, the transmission device has a column of solar cells or multiple columns of solar cells are arranged at intervals, the blowing device is provided with one or more columns, each column of solar cells corresponds to at least one column of the blowing device, and each of the blowing devices can be independently controlled.

[0020] Furthermore, along the transmission direction of the transmission device, the optical modules and the air blowing devices are arranged in multiple rows, and each row of the air blowing devices is respectively arranged in the spacing area between two adjacent rows of the optical modules.

[0021] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the solar cell light injection module of the present invention has a simple structure, and the light-emitting surfaces of the light source devices are arranged in sequence to form a first contour surface with a middle portion concave away from the solar cell, so that the light beams emitted by the light source devices at different positions on the first contour surface can be superimposed, so that the light beams emitted by the light source devices can be converged into a high-intensity light band and incident on the surface of the solar cell, even if the light intensity incident on the surface of the solar cell is increased, thereby improving the conversion efficiency of the solar cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a solar cell light injection module of the present invention (viewed from top to bottom);

[0023] Figure 2 This is a schematic structural diagram of the solar cell light injection module of the present invention (without the transmission device, viewed from bottom to top);

[0024] Figure 3 This is a schematic structural diagram of the solar cell light injection module of the present invention (excluding the transmission device and part of the optical module, viewed from top to bottom);

[0025] Figure 4 This is a schematic structural diagram of the solar cell light injection module of the present invention (excluding the transmission device and part of the optical module, viewed from bottom to top);

[0026] Figure 5 It is a structural schematic diagram of the relative positions of the optical module and the transmission device of the solar cell light injection module of the present invention;

[0027] Figure 6 A schematic structural diagram of an optical module of a solar cell light injection module of the present invention;

[0028] Figure 7 The schematic diagram of the structure of the solar cell light injection module of the present invention along the direction of the first contour surface, where the light beams emitted by the light beads in the same column / row are incident on the solar cell Figure 1 ;

[0029] Figure 8 The schematic diagram of the structure of the solar cell light injection module of the present invention along the direction of the first contour surface, where the light beams emitted by the light beads in the same column / row are incident on the solar cell Figure 2 ;

[0030] Fig. 9 It is a structural schematic diagram of the solar cell light injection module of the present invention along the direction of the first contour surface, and the light beams emitted by each light band are incident on the solar cell. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0032] like Figure 1 As shown, the solar cell light injection module of the present invention comprises a frame 1, an optical module 2 and a transmission device 3 respectively arranged on the frame 1, and the transmission device 3 transmits the solar cell 100 along the front-rear direction.

[0033] The optical module 2 is used to provide illumination. The optical module 2 includes a plurality of independently controllable light source devices. The light-emitting front of the light source device is arranged toward the direction of the solar cell. The light-emitting front of the plurality of light source devices is sequentially arranged along the transmission direction of the transmission device 3 or along the transmission direction perpendicular to the transmission device 3 to form at least one group of first contour surfaces S with the middle portion concave away from the solar cell 100. The light beams emitted by each light source device located on the first contour surface S are incident on the solar cell to form a light beam. Along the direction of the first contour surface S, the width W1 of the first contour surface S is greater than the width W2 of the light beam. In this way, the light beams at different parts of the first contour surface S can be superimposed, so that the light beams emitted by each light source device can be converged into a high-intensity light band incident on the surface of the solar cell 100. Even if the light intensity incident on the surface of the solar cell 100 is increased, in this embodiment, compared with the prior art, the light intensity can be increased by 50%, thereby improving the conversion efficiency of the solar cell.

[0034] In this embodiment, the incident angle a of the light source device at different positions of the first contour surface S is between 1 and 90 degrees.

[0035] The light source device may be a light bead 211 , and each light bead 211 is arranged in a matrix along the transmission direction of the transmission device 3 and along the transmission direction perpendicular to the transmission device 3 .

[0036] Along the direction of the first contour surface S, the tangent lines of the light beads 211 in the same column / row at the position of the first contour surface S all extend along different straight line directions, such as Figure 7 shown.

[0037] Alternatively, along the direction of the first contour surface S, the tangent lines of the plurality of light beads 211 arranged continuously in the same column / row at the position of the first contour surface S extend in the same straight line direction, such as Figure 8 shown.

[0038] The light source device may also use a light strip 212, wherein a plurality of light strips 212 are sequentially arranged along the transmission direction of the transmission device 3 to form at least one group of first contour surfaces S, and each light strip 212 extends along the transmission direction perpendicular to the transmission device 3, or a plurality of light strips 212 are sequentially arranged along the transmission direction perpendicular to the transmission device 3 to form at least one group of first contour surfaces S, and each light strip 212 extends along the transmission direction of the transmission device 3, such as Fig. 9 shown.

[0039] In a specific implementation manner, the light-emitting front surfaces of the plurality of light source devices are sequentially arranged along the transmission direction of the transmission device 3 to form a group of first contour surfaces S. Along the direction perpendicular to the transmission direction of the transmission device, a row of solar cells 100 is transmitted on the transmission device 3. Of course, the transmission device 3 can also simultaneously transmit multiple rows of solar cells 100 at intervals, such as Figure 1 to Figure 6Alternatively, the transmission device 3 is provided with multiple columns, and each column of the transmission device 3 is arranged in parallel and spaced apart along a transmission direction perpendicular to the transmission device 3, i.e., the left-right direction, and each column of the transmission device 3 transmits a column of solar cells 100. In this embodiment, the optical module 2 extends along a transmission direction perpendicular to the transmission device 3, i.e., the left-right direction.

[0040] In another specific embodiment, a row of solar cells 100 are transmitted on the transmission device 3 in a direction perpendicular to the transmission direction of the transmission device 3, and the light-emitting front faces of the plurality of light source devices are sequentially arranged in a direction perpendicular to the transmission direction of the transmission device 3 to form a group of first contour surfaces S, which are not shown in the figure. In this embodiment, the optical module 2 extends in the transmission direction of the transmission device 3, i.e., in the front-to-back direction.

[0041] In another specific embodiment, along the direction perpendicular to the transmission direction of the transmission device 3, the transmission device 3 transmits multiple columns of solar cells 100, or the transmission device 3 is provided with multiple columns, and each column of transmission devices 3 is arranged in parallel along the transmission direction perpendicular to the transmission device 3, that is, the left and right direction, and each column of transmission devices 3 transmits a column of solar cells 100. The light-emitting front faces of the multiple light source devices are sequentially arranged along the transmission direction perpendicular to the transmission device 3 to form multiple groups of first contour surfaces S, and each group of first contour surfaces S corresponds to a column of solar cells 100, which is not shown in the figure. In this embodiment, the optical module 2 extends along the transmission direction of the transmission device 3, that is, the front-to-back direction.

[0042] Specifically, the optical module 2 also includes a light source box body 22 and a fixing plate disposed in the light source box body 22, the fixing plate having a mounting surface for mounting each light source device, the mounting surface being at least one set of second contour surfaces extending along the transmission direction of the transmission device 3 or perpendicular to the transmission direction of the transmission device 3, the second contour surface corresponding to the first contour surface. That is, in the above-mentioned several embodiments, the mounting surface for mounting the light source device is set to a structure in which the middle is concave away from the solar cell 100, so that after each light source device is installed on the mounting surface, the light-emitting surfaces of each light source device are sequentially arranged to form a corresponding structure.

[0043] The optical module 2 also includes a plurality of condensing lens devices (not shown in the figure) covered outside the light emitting surface of the light source device. Preferably, a condensing lens device is covered outside the light emitting surface of each light source device. The condensing lens device can adjust the angle of the light emitted by the light source device, thereby increasing the light intensity and further improving the conversion efficiency of the solar cell.

[0044] The optical module 2 further includes a first cooling device for cooling the light-emitting back side of the light source device. In this embodiment, the first cooling device is a water cooling device.

[0045] The water cooling device includes a first cooling water circuit and a second cooling water circuit that are independently arranged. The first cooling water circuit includes a first water inlet 231 and a first water outlet 232, and the first water inlet 231 and the first water outlet 232 are respectively located at the two ends of the optical module 2 perpendicular to the transmission direction of the transmission device 3, that is, at the left and right ends of the light source box body 22. The second cooling water circuit includes a second water inlet 241 and a second water outlet 242, and the second water inlet 241 and the second water outlet 242 are also respectively located at the two ends of the optical module 2 perpendicular to the transmission direction of the transmission device 3, that is, at the left and right ends of the light source box body 22. In this embodiment, the first water inlet 231 and the second water outlet 242 are located on the same side of the light source box body 22, and the first water outlet 232 and the second water inlet 241 are located on the same side of the light source box body 22. By setting up a water cooling device, the heat on the back side of the light source device can be heat-dissipated by heat exchange with cold water. The water cooling device uses two independently arranged cooling water circuits for cooling, which can improve the cooling effect; moreover, when one cooling water circuit fails, the light-emitting back side of the light source device can also be cooled by the other cooling water circuit.

[0046] The optical module 2 also includes a second cooling device 25 disposed on the light source box body 22 for cooling the light emitting front of the light source device. In this embodiment, the second cooling device is an air cooling device, and the air cooling device can adopt a structure in the prior art. By providing the air cooling device, air can circulate on the light emitting front of the light source device, thereby reducing the temperature of the light emitting surface of the light source device, thereby extending the service life of the light source device.

[0047] In this embodiment, the optical module 2 extends in a direction perpendicular to the transmission direction of the transmission device 3. Along the transmission direction of the transmission device, the optical modules 2 are arranged in parallel in multiple rows. Two adjacent rows of optical modules 2 can be arranged without a gap or with a certain distance between them.

[0048] The light injection module also includes a cooling device for cooling the solar cells located on the transmission device 3 .

[0049] Specifically, Figure 1 to Figure 4 As shown, the cooling device includes a blowing device 41 for blowing air to cool the surface of the solar cell 100, the exhaust port of the blowing device 41 is located between the light source device and the transmission device 3, the exhaust direction of the blowing device 41 is set toward the surface of the solar cell 100, and the air intake volume of the blowing device 41 can be adjusted. In this way, the temperature of the surface of the solar cell 100 can be adjusted by adjusting the size of the air intake volume to meet the corresponding process requirements.

[0050] In this embodiment, the air blowing device 41 is a wind knife device, the exhaust port of the wind knife device is arranged toward the solar cell 100, and the air inlet of the wind knife device is connected to the air source device. When the wind knife device is used to cool the solar cell, the exhaust of the wind knife device is continuous, and the surface of the solar cell 100 covered by the cooling gas is also continuous, so that the temperature of the solar cell 100 can be cooled more evenly.

[0051] Along the direction perpendicular to the transmission direction of the transmission device 3, a column of solar cells 100 or multiple columns of solar cells 100 are arranged at intervals on the transmission device 3, and one or more columns of cooling devices are arranged, and each column of solar cells 100 corresponds to at least one column of cooling devices.

[0052] Along the transmission direction of the transmission device 3 , one or more rows of cooling devices are arranged. Preferably, each row of cooling devices is arranged in the spacing area between two adjacent rows of optical modules 2 .

[0053] The cooling devices installed in each row and column can be independently controlled to open, and the air intake volume can also be independently adjusted.

[0054] The cooling device also includes an air source device (not shown in the figure) for supplying air to each air blowing device 41. Each air blowing device 41 is connected to the air source device through a pipeline 42. A control valve is provided at the air inlet position of each air blowing device 41, so as to control the air intake amount of each air blowing device 41. The air intake medium provided by the air source device is nitrogen, compressed air or other inert gas.

[0055] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar cell light injection module, comprising a frame and an optical module arranged on the frame, wherein the optical module comprises a plurality of independently controllable light source devices, wherein the light emitting front of the light source device is arranged toward the direction of the solar cell, and characterized in that: The light-emitting front surfaces of the plurality of light source devices are sequentially arranged along the transmission direction of the transmission device or along the transmission direction perpendicular to the transmission device to form at least one group of first contour surfaces whose middle portions are concave away from the solar cell, and the light beams emitted by the light source devices located on the first contour surface are incident on the solar cell to form a light beam, and along the direction of the first contour surface, the width of the first contour surface is greater than the width of the light beam; The light source device is a light strip, and a plurality of the light strips are sequentially arranged along the transmission direction of the transmission device to form at least one group of the first contour surfaces, and each of the light strips extends along the transmission direction perpendicular to the transmission device; or, a plurality of the light strips are sequentially arranged along the transmission direction perpendicular to the transmission device to form at least one group of the first contour surfaces, and each of the light strips extends along the transmission direction of the transmission device.

2. The solar cell light injection module according to claim 1, characterized in that: The optical module also includes a light source box body and a fixing plate arranged in the light source box body, the fixing plate has a mounting surface for mounting the light source device, the mounting surface is a second contour surface extending along the transmission direction of the transmission device or along a transmission direction perpendicular to the transmission direction of the transmission device, and the second contour surface corresponds to the first contour surface.

3. The solar cell light injection module according to claim 1, characterized in that: The optical module extends along a transmission direction perpendicular to the transmission device, and the light-emitting front sides of the multiple light source devices are sequentially arranged along the transmission direction of the transmission device to form a group of the first contour surfaces. Along the direction perpendicular to the transmission direction of the transmission device, a column of solar cells is provided on the transmission device or multiple columns of solar cells are arranged at intervals, or the transmission device is provided with multiple columns side by side, and each column of the transmission device transmits a column of solar cells.

4. The solar cell light injection module according to claim 1, characterized in that: A row of solar cells is provided on the transmission device along a direction perpendicular to the transmission direction of the transmission device, the optical module extends along the transmission direction of the transmission device, and the light-emitting front sides of multiple light source devices are arranged in sequence along the transmission direction perpendicular to the transmission direction of the transmission device to form a group of the first contour surfaces.

5. The solar cell light injection module according to claim 1, characterized in that: A plurality of columns of solar cells are arranged on the transmission device along a direction perpendicular to the transmission direction of the transmission device, or a plurality of columns of solar cells are arranged side by side on the transmission device along a direction perpendicular to the transmission direction of the transmission device, and each column of the transmission device transmits a column of solar cells, the optical module extends along the transmission direction of the transmission device, and the light-emitting front sides of the plurality of light source devices are sequentially arranged along the transmission direction perpendicular to the transmission device to form a plurality of groups of the first contour surfaces, and each group of the first contour surfaces corresponds to a column of solar cells.

6. The solar cell light injection module according to claim 1, characterized in that: The optical module also includes a plurality of condensing lens devices covered outside the light emitting surface of the light source device, and one condensing lens device is covered outside the light emitting surface of each light source device.

7. The solar cell light injection module according to any one of claims 1 to 6, characterized in that: The light injection module also includes a cooling device for cooling the solar cells located on the transmission device, and the cooling device includes an air blowing device arranged on the frame, and the exhaust port of the air blowing device is located between the light source device and the transmission device. The exhaust direction of the air blowing device is set toward the surface of the solar cell, and the air intake volume of the air blowing device can be adjusted.

8. The solar cell light injection module according to claim 7, characterized in that: The air blowing device is a wind knife device, the exhaust port of the wind knife device is arranged toward the solar cell, and the air inlet of the wind knife device is connected to the air source device.

9. The solar cell light injection module according to claim 7, characterized in that: Along a direction perpendicular to the transmission direction of the transmission device, the transmission device has a column of solar cells or multiple columns of solar cells are arranged at intervals, and the blowing device is provided with one or more columns, each column of solar cells corresponds to at least one column of the blowing device, and each of the blowing devices can be independently controlled.

10. The solar cell light injection module according to claim 7, characterized in that: Along the transmission direction of the transmission device, the optical modules and the air blowing devices are arranged in multiple rows, and each row of the air blowing devices is respectively arranged in the spacing area between two adjacent rows of the optical modules.

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