Solar cell testing device

Abstract

The utility model relates to the technical field of photovoltaic solar cells, and discloses a solar cell testing device, which comprises a testing box, the inner wall of which is enclosed to form a testing cavity; the battery body is arranged in the test cavity; a light source; the spectroscope is arranged in the test cavity and is suitable for dividing a light beam emitted by the light source into a first light beam and a second light beam; the first reflective mirror is arranged on a light path of the first light beam and is suitable for reflecting the first light beam to the front surface of the battery body; the second reflective mirror is arranged on a light path of the second light beam and is suitable for reflecting the second light beam to the back surface of the battery body; and the attenuation adjustment assembly is at least arranged on the light path of the second light beam, and the attenuation adjustment assembly is suitable for performing attenuation adjustment on the light beam. The solar cell testing device provided by the utility model not only avoids the influence of the interference between the two light sources on the testing precision, but also can reflect the real characteristics of the cell in double-sided illumination, thereby improving the accuracy of the testing power.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic solar cells, in particular to a solar cell testing device. Background Art

[0002] Metal halide perovskite solar cells have attracted great attention, and their power conversion efficiency has rapidly increased from less than 4% to more than 25%. Further improving performance at a low additional cost is crucial to the commercialization of perovskite solar cells. One of the most promising approaches is to adopt a tandem structure to overcome the Shockley-Queisser limit of single-junction solar cells. Tandem solar cells have higher power conversion efficiency than single-junction solar cells by stacking two absorbers with complementary band gaps. Another strategy that can effectively increase the output power of cells is to adopt a bifacial cell structure. In the bifacial cell structure, the cell can absorb light from the front and back at the same time. Since the back of the cell can receive reflected and scattered light from the ground and the environment in actual situations, the bifacial structure can effectively improve the output power of the device. The power output can be increased by 5% to 30%. Therefore, the bifacial structure of perovskite silicon solar tandem cells is an important direction for future development. Compared with traditional cells, double-sided perovskite silicon solar cells (such as perovskite / heterojunction stacked solar cells) have greater advantages in absorbing sunlight and increasing power generation. Therefore, testing of double-sided perovskite silicon solar cells is particularly important.

[0003] The existing method for testing bifacial solar cells is: first, cover the back of the solar cell and then 2 Test the front power of the solar cell under the condition of 200W / m 2 -1000W / m 2 The back power of the solar cell is tested under the condition of 1000W / m2. The sum of the front and back powers is the final solar cell power. However, this is not the true characteristic of the cell when it is illuminated on both sides, so this method is difficult to test the accurate power of the solar cell. Another method is to add two 1000W / m2 2 and 200W / m 2 -1000W / m 2 The power source is distributed on the upper and lower sides of the bifacial solar cell, and the power of the solar cell is tested at the same time. However, the light from the two light sources overlaps with each other, resulting in an increase in the light intensity on one side of the cell, and the interference between the two light sources affects the test accuracy, affecting the accuracy of the test power. Utility Model Content

[0004] In view of this, the utility model provides a solar cell testing device to solve the problem of low testing accuracy in the existing method of testing double-sided solar cells.

[0005] The utility model provides a solar cell testing device, comprising:

[0006] A test box, the inner wall of the test box encloses a test cavity;

[0007] The battery body is arranged in the test cavity;

[0008] A light source, built into the test chamber;

[0009] A beam splitter, arranged at the light-emitting side of the light source, adapted to split the light beam emitted by the light source into a first light beam and a second light beam;

[0010] A first reflector, disposed on the optical path of the first light beam, and adapted to reflect the first light beam to the front side of the battery body;

[0011] A second reflector is disposed on the optical path of the second light beam, and the second reflector is suitable for reflecting the second light beam to the back side of the battery body;

[0012] The attenuation adjustment component is at least arranged on the optical path of the second light beam, and is suitable for performing attenuation adjustment on the light beam.

[0013] The solar cell testing device provided by the utility model provides a spectroscope on the light-emitting side of the light source, thereby dividing the light beam emitted by the same light source into a first light beam and a second light beam, thereby avoiding the influence of interference between the two light sources on the test accuracy; provides a first reflector between the spectroscope and the front battery, thereby reflecting the first light beam to the front battery of the battery body; provides a second reflector between the spectroscope and the back battery, thereby reflecting the second light beam to the back battery of the battery body, thereby enabling the front and back sides of the battery body to simultaneously utilize the light beam emitted by the same light source; provides an attenuation adjustment component, thereby performing attenuation adjustment on the light beam, so as to meet the light intensity requirement when the front and back sides of the battery body are tested simultaneously; through the synergistic effect of the spectroscope, the first reflector, the second reflector and the attenuation adjustment component, the double-sided simultaneous test of the perovskite silicon stacked solar double-sided battery is realized, which not only avoids the influence of interference between the two light sources on the test accuracy, but also can reflect the real characteristics of the battery when the double sides are illuminated, thereby improving the accuracy of the test power.

[0014] In an optional embodiment, the attenuation adjustment component includes one or more attenuation plates arranged along the light beam path, and the attenuation plates are detachably connected to the inner wall of the test box.

[0015] By configuring in this way, the number of attenuation sheets can be adjusted during testing, thereby facilitating the adjustment of the light intensity of the first light beam and / or the second light beam, thereby meeting different light intensity requirements on the front and / or back of the battery body.

[0016] In an optional embodiment, the attenuation adjustment component also includes a mounting seat, which is arranged on the inner wall of the test box; a plurality of movable slots are opened on the mounting seat, and the plurality of movable slots are arranged at intervals along the propagation direction of the light path, and one end of the attenuation plate can be flexibly plugged into and pulled out of the movable slot.

[0017] With such an arrangement, a detachable fixed connection between the attenuation sheet and the mounting seat is achieved by movably inserting and removing one end of the attenuation sheet from the movable slot, so that the number of attenuation sheets can be adjusted easily during testing.

[0018] In an optional implementation, one end of the attenuation sheet is inserted into the movable slot, and the other end is suspended.

[0019] This arrangement can avoid affecting the propagation of the light beam due to the provision of an additional supporting structure, and can also facilitate the active insertion and removal of the attenuation plate relative to the active slot, thereby facilitating the adjustment of the light intensity of the first light beam and / or the second light beam.

[0020] In an optional embodiment, a first access opening is provided on the side wall of the test box along the insertion and removal direction of the attenuation sheet, and the first access opening is communicated with the movable slot.

[0021] Through such an arrangement, when the light intensity of the first light beam and / or the second light beam is adjusted, the attenuation sheet can be pulled out from the active slot along the plug-in direction to the outside of the test box through the first access port, and / or the attenuation sheet can be inserted into the active slot along the plug-in direction through the first access port until the attenuation sheet is built into the designated position in the test cavity, thereby avoiding repeated opening and closing of the test box and greatly improving the convenience of disassembling the attenuation sheet.

[0022] In an optional embodiment, the solar cell testing device further comprises a first cover plate, the first cover plate is detachably connected to the side wall of the testing box, and the first cover plate is suitable for covering the first access opening.

[0023] By such arrangement, the first access opening is covered by the first cover plate, thereby ensuring a dark box environment inside the test box and improving the accuracy of the test power.

[0024] In an optional embodiment, there are two second reflectors, one of which is suitable for reflecting the second light beam along the first direction to another second reflector, and the other second reflector is suitable for reflecting the second light beam along the second direction to the back side of the battery body.

[0025] By such arrangement, the second light beam split by the beam splitter is reflected to the back of the battery body in the limited internal space of the test box, ensuring that the second light beam can finally vertically incident on the back of the battery body, which is beneficial to improving light utilization.

[0026] In an optional implementation, the solar cell testing device further includes a filter, and the filter is arranged on the optical path of the second light beam.

[0027] Through such a setting, on the one hand, the light intensity of the second light beam can be weakened, so that the second light beam can be processed to achieve a specific low-power light intensity. On the other hand, since silicon mainly absorbs light in the infrared region, a filter is set to filter ultraviolet light through the filter, thereby avoiding the influence of ultraviolet light on the back battery.

[0028] In an optional embodiment, the solar cell testing device also includes an angle adjustment mechanism, which is arranged on the inner wall of the test box, and is connected to one end of the first reflector and / or the second reflector, and the angle adjustment mechanism is suitable for adjusting the relative angle between the first reflector and / or the second reflector and the battery body.

[0029] By such an arrangement, the relative angle between the first reflector and / or the second reflector and the battery body is adjusted by the angle adjustment mechanism, thereby facilitating the adjustment of the angle between the first light beam and the front surface of the battery body and / or the angle between the second light beam and the back surface of the battery body, which is beneficial to improving the accuracy of the test power.

[0030] In an optional embodiment, the front battery side of the battery body and the inner wall of the test box are enclosed to form a front test cavity, and the front test cavity is suitable for the propagation of the first light beam; the back battery side of the battery body and the inner wall of the test box are enclosed to form a back test cavity, and the back test cavity is suitable for the propagation of the second light beam.

[0031] By such an arrangement, the test cavity of the test box is separated into a front test cavity and a back test cavity by the battery body, thereby avoiding the influence of mutual interference between the first light beam and the second light beam during the propagation process on the test accuracy, which is beneficial to ensure the accuracy of the test power. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1A schematic diagram of the working principle of a solar cell testing device according to an embodiment of the utility model;

[0034] Figure 2 A schematic diagram of the working principle of another solar cell testing device according to an embodiment of the utility model;

[0035] Figure 3 for Figure 2 Schematic diagram of the installation principle of the attenuation plate at A in the middle;

[0036] Figure 4 for Figure 2 Schematic diagram of the installation principle of the battery body at B in the middle.

[0037] Description of reference numerals:

[0038] 10. Test box; 101. Front test cavity; 102. Back test cavity; 11. First access opening; 12. First cover plate; 13. Second access opening; 14. Second cover plate;

[0039] 20. Battery body; 21. Front battery; 22. Back battery; 23. Support seat;

[0040] 30. light source; 31. light intensity regulator;

[0041] 40. beam splitter; 401. first light beam; 402. second light beam;

[0042] 51. first reflector; 52. second reflector; 53. angle adjustment mechanism;

[0043] 60. attenuation adjustment component; 61. attenuation sheet; 62. mounting seat; 621. movable slot;

[0044] 70. Filter;

[0045] 80. Fan. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0047] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0048] According to an embodiment of the utility model, a solar cell testing device is provided, comprising:

[0049] A test box 10, wherein the inner wall of the test box 10 encloses a test cavity;

[0050] The battery body 20 is disposed in the test cavity;

[0051] A light source 30 is built into the test cavity;

[0052] The beam splitter 40 is disposed on the light-emitting side of the light source 30 , and is suitable for splitting the light beam emitted by the light source 30 into a first light beam 401 and a second light beam 402 ;

[0053] A first reflector 51 is disposed on the optical path of the first light beam 401 , and the first reflector 51 is suitable for reflecting the first light beam 401 to the front side of the battery body 20 ;

[0054] A second reflector 52 is disposed on the optical path of the second light beam 402 , and the second reflector 52 is suitable for reflecting the second light beam 402 to the back side of the battery body 20 ;

[0055] The attenuation adjustment component 60 is at least arranged on the optical path of the second light beam 402, and the attenuation adjustment component 60 is suitable for performing attenuation adjustment on the light beam.

[0056] It should be noted that, for the sake of better explanation and understanding, this embodiment is described by taking a perovskite silicon solar bifacial cell as an example. Specifically, the cell body 20 is a stack of a perovskite cell and a silicon cell, see Figure 1 As shown, the battery body 20 includes a front battery 21 and a back battery 22. The front battery 21 is a perovskite battery, and the back battery 22 is a silicon battery. The light intensity required for testing the back battery 22 is weaker than the light intensity required for testing the front battery 21. The light intensity required for testing the back battery 22 can be 200W / m 2 -1000W / m 2 The light intensity required for testing the front cell 21 can be 1000W / m 2 .

[0057] It should be noted that "the attenuation adjustment component 60 is at least arranged on the optical path of the second light beam 402" means: when the light intensity of the light source 30 meets the light intensity required for the front battery 21 test, see Figure 1 As shown, only the attenuation adjustment component 60 is set on the optical path of the second light beam 402, so that the second light beam 402 is attenuated by the attenuation adjustment component 60 to meet the light intensity required for the back battery 22 test; when the light intensity of the light source 30 exceeds the light intensity required for the front battery 21 test, see Figure 2As shown, at this time, not only an attenuation adjustment component 60 needs to be set on the optical path of the second light beam 402, but also an attenuation adjustment component 60 needs to be set on the optical path of the first light beam 401 to attenuate the first light beam 401 and the second light beam 402, so as to meet the light intensity required for testing the front battery 21 and the back battery 22.

[0058] The solar cell testing device provided in this embodiment provides a beam splitter 40 on the light-emitting side of the light source 30, thereby splitting the light beam emitted by the same light source 30 into a first light beam 401 and a second light beam 402, thereby avoiding the influence of interference between the two light sources on the testing accuracy; provides a first reflector 51 between the beam splitter 40 and the front battery 21, thereby reflecting the first light beam 401 to the front battery 21 of the battery body 20; provides a second reflector 52 between the beam splitter 40 and the back battery 22, thereby reflecting the second light beam 402 to the back battery 22 of the battery body 20, thereby making The front and back sides of the battery body 20 can simultaneously utilize the light beams emitted by the same light source 30; by setting an attenuation adjustment component 60, the light beam is attenuated and adjusted to meet the light intensity requirement when the front and back sides of the battery body 20 are tested simultaneously; through the synergistic effect of the spectroscope 40, the first reflector 51, the second reflector 52 and the attenuation adjustment component 60, the double-sided simultaneous testing of the perovskite silicon stacked solar bifacial battery is achieved, which not only avoids the influence of interference between the two light sources on the test accuracy, but also can reflect the real characteristics of the battery when illuminated on both sides, thereby improving the accuracy of the test power.

[0059] Furthermore, the solar cell testing device further comprises a light intensity regulator 31 , which is suitable for regulating the light intensity of the light source 30 to meet different lighting requirements on the front and / or back of the cell body 20 .

[0060] In some embodiments, see Figure 1 and Figure 2 As shown, the attenuation adjustment component 60 includes one or more attenuation plates 61 arranged along the light beam path. The attenuation plates 61 are detachably connected to the inner wall of the test box 10 so that the number of attenuation plates 61 can be adjusted during testing, thereby facilitating the adjustment of the light intensity of the first light beam 401 and / or the second light beam 402, thereby meeting different light intensity requirements on the front and / or back of the battery body 20.

[0061] In some embodiments, please combine Figure 2 and Figure 3As shown, the attenuation adjustment component 60 also includes a mounting base 62, which is arranged on the inner wall of the test box 10; a plurality of movable slots 621 are provided on the mounting base 62, and the plurality of movable slots 621 are arranged at intervals along the propagation direction of the light path. One end of the attenuation sheet 61 is movably plugged in and out of the movable slot 621, thereby realizing a detachable fixed connection between the attenuation sheet 61 and the mounting base 62, so as to facilitate the adjustment of the number of attenuation sheets 61 during testing.

[0062] In some embodiments, please combine Figure 1 and Figure 2 As shown, one end of the attenuation plate 61 is inserted into the active slot 621, and the other end is suspended. This can not only avoid affecting the propagation of the light beam due to the setting of an additional supporting structure, but also facilitate the active insertion and removal of the attenuation plate 61 relative to the active slot 621, so as to facilitate the adjustment of the light intensity of the first light beam 401 and / or the second light beam 402.

[0063] In some embodiments, see Figure 3 As shown, a first access opening 11 is provided on the side wall of the test box 10 along the plugging and unplugging direction of the attenuation sheet 61, one end of the first access opening 11 is connected to the active slot 621, and the other end is connected to the outside of the test box 10; when the light intensity of the first light beam 401 and / or the second light beam 402 is adjusted, the attenuation sheet 61 can be pulled out from the active slot 621 to the outside of the test box 10 along the plugging and unplugging direction through the first access opening 11, and / or the attenuation sheet 61 can be inserted into the active slot 621 along the plugging and unplugging direction through the first access opening 11 until the attenuation sheet 61 is built into the designated position in the test cavity, thereby avoiding repeated opening and closing of the test box 10 and greatly improving the convenience of disassembling the attenuation sheet 61.

[0064] In some embodiments, see Figure 3 As shown, the solar cell testing device further includes a first cover plate 12, which is detachably connected to the side wall of the test box 10 and is suitable for covering the first access opening 11, thereby ensuring a dark box environment inside the test box 10 and improving the accuracy of the test power.

[0065] In some embodiments, see Figure 4 As shown, a second access opening 13 for taking and placing the battery body 20 is also provided on the side wall of the test box 10, and the direction of taking and placing the battery body 20 is perpendicular to the front and back sides of the battery body 20; a supporting seat 23 for active plugging and unplugging of the frame of the battery body 20 is provided in the test box 10, and the supporting seat 23 is a groove structure with a U-shaped cross-section. The supporting seat 23 can be used to position the battery body 20 and facilitate the taking and placing of the battery body 20 relative to the test box 10.

[0066] Furthermore, the solar cell testing device also includes a second cover plate 14, which is detachably connected to the side wall of the test box 10 and is suitable for covering the second access opening 13, thereby ensuring a dark box environment inside the test box 10 and improving the accuracy of the test power.

[0067] In some embodiments, see Figure 1 and Figure 2 As shown, the light source 30 is located at the top of the test box 10, and is divided into a first light beam 401 along the first direction and a second light beam 402 along the second direction by a beam splitter 40. After the light splitting and before passing through the corresponding reflector, the first light beam 401 and the second light beam 402 are perpendicular to each other. After being reflected by the corresponding reflector, the first light beam 401 and the second light beam 402 are both perpendicular to the battery body 20. There are two second reflectors 52, one of which is suitable for reflecting the second light beam 402 along the first direction to the other second reflector 52, and the other second reflector 52 is suitable for reflecting the second light beam 402 along the second direction to the back of the battery body 20, so that the second light beam 402 separated by the beam splitter 40 is reflected to the back of the battery body 20 in the limited internal space of the test box 10, ensuring that the second light beam 402 can finally be incident vertically on the back of the battery body 20, which is conducive to improving the light utilization rate.

[0068] Furthermore, the angle between the second reflector 52 and the battery body 20 may be 45°, so that the second light beam 402 can finally vertically impinge on the back of the battery body 20 , and the utilization rate of the internal space of the test box 10 can be improved.

[0069] In some embodiments, see Figure 1 and Figure 2 As shown, the solar cell testing device also includes a filter 70, and the filter 70 is arranged on the optical path of the second light beam 402; by arranging the filter 70 on the optical path of the second light beam 402, the filter 70 is an ultraviolet filter, which can weaken the light intensity of the second light beam 402 on the one hand, thereby processing the second light beam 402 to achieve a specific low-power light intensity; on the other hand, since silicon mainly absorbs light in the infrared region, by setting the filter 70, the ultraviolet light can be filtered through the filter 70, thereby avoiding the influence of the ultraviolet light on the back cell 22.

[0070] In some embodiments, see Figure 1 and Figure 2As shown, the solar cell testing device also includes an angle adjustment mechanism 53, which is arranged on the inner wall of the test box 10, and is connected to one end of the first reflector 51 and / or the second reflector 52. The relative angle between the first reflector 51 and / or the second reflector 52 and the battery body 20 is adjusted by the angle adjustment mechanism 53, so as to facilitate the adjustment of the angle between the first light beam 401 and the front side of the battery body 20 and / or the angle between the second light beam 402 and the back side of the battery body 20, which is beneficial to improve the accuracy of the test power.

[0071] Further, the angle adjustment mechanism 53 can be designed to work in the following manner: the angle adjustment mechanism 53 includes a slider and a spiral drive assembly; the slider is slidably disposed on the inner wall of the test box 10, and the slider abuts against one end of the first reflector 51 and / or the second reflector 52; the spiral drive assembly includes a fixed seat and a screw, the fixed seat is fixedly disposed on the inner wall of the test box 10, one axial end of the screw is axially fixed to the slider, the screw is threadedly connected to the fixed seat, and the screw rotates relative to the fixed seat to convert the rotational motion into axial linear motion, thereby driving the slider to move linearly, and then adjusting the relative angle between the first reflector 51 and / or the second reflector 52 and the battery body 20 through the slider.

[0072] In some embodiments, see Figure 1 and Figure 2 As shown, the front battery side of the battery body 20 and the inner wall of the test box 10 are enclosed to form a front test cavity 101, and the front test cavity 101 is suitable for the propagation of the first light beam 401; the back battery side of the battery body 20 and the inner wall of the test box 10 are enclosed to form a back test cavity 102, and the back test cavity 102 is suitable for the propagation of the second light beam 402; the test cavity of the test box 10 is separated by the battery body 20 to form the front test cavity 101 and the back test cavity 102, thereby avoiding the influence of mutual interference between the first light beam 401 and the second light beam 402 during the propagation process on the test accuracy, which is beneficial to ensure the accuracy of the test power.

[0073] Furthermore, a fan 80 is provided in the test box 10 to dissipate heat in the test box 10 .

[0074] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A solar cell testing device, characterized in that: include: A test box (10), wherein the inner wall of the test box (10) encloses a test cavity; A battery body (20) is disposed in the test cavity; A light source (30) is built into the test cavity; A beam splitter (40) is arranged on the light-emitting side of the light source (30), and the beam splitter (40) is suitable for splitting the light beam emitted by the light source (30) into a first light beam (401) and a second light beam (402); A first reflector (51) is arranged on the optical path of the first light beam (401), and the first reflector (51) is suitable for reflecting the first light beam (401) to the front side of the battery body (20); A second reflector (52) is disposed on the optical path of the second light beam (402), and the second reflector (52) is suitable for reflecting the second light beam (402) to the back side of the battery body (20); The attenuation adjustment component (60) is at least arranged on the optical path of the second light beam (402), and the attenuation adjustment component (60) is suitable for performing attenuation adjustment on the light beam.

2. The solar cell testing device according to claim 1, characterized in that: The attenuation adjustment component (60) comprises one or more attenuation plates (61) arranged along the light beam path, and the attenuation plates (61) are detachably connected to the inner wall of the test box (10).

3. The solar cell testing device according to claim 2, characterized in that: The attenuation adjustment component (60) further comprises a mounting seat (62), wherein the mounting seat (62) is arranged on the inner wall of the test box (10); a plurality of movable slots (621) are provided on the mounting seat (62), wherein the plurality of movable slots (621) are arranged at intervals along the propagation direction of the light path, and one end of the attenuation sheet (61) is movably plugged in and out of the movable slots (621).

4. The solar cell testing device according to claim 3, characterized in that: One end of the attenuation sheet (61) is inserted into the movable slot (621), and the other end is in a suspended state.

5. The solar cell testing device according to claim 3, characterized in that: A first access opening (11) is provided on the side wall of the test box (10) along the insertion and removal direction of the attenuation sheet (61), and the first access opening (11) is connected to the movable slot (621).

6. The solar cell testing device according to claim 5, characterized in that: The solar cell testing device further comprises a first cover plate (12), the first cover plate (12) being detachably connected to the side wall of the testing box (10), and the first cover plate (12) being suitable for covering the first access opening (11).

7. The solar cell testing device according to claim 1, characterized in that: The number of the second reflectors (52) is two, one of which is suitable for reflecting the second light beam (402) along a first direction to another second reflector (52), and the other second reflector (52) is suitable for reflecting the second light beam (402) along a second direction to the back side of the battery body (20).

8. The solar cell testing device according to claim 1, characterized in that: The solar cell testing device further comprises a filter (70), wherein the filter (70) is arranged on the optical path of the second light beam (402).

9. The solar cell testing device according to any one of claims 1 to 8, characterized in that: The solar cell testing device further comprises an angle adjustment mechanism (53), the angle adjustment mechanism (53) being arranged on the inner wall of the testing box (10), the angle adjustment mechanism (53) being connected to one end of the first reflector (51) and / or the second reflector (52), and the angle adjustment mechanism (53) being suitable for adjusting the relative angle between the first reflector (51) and / or the second reflector (52) and the battery body (20).

10. The solar cell testing device according to any one of claims 1 to 8, characterized in that: The front battery side of the battery body (20) and the inner wall of the test box (10) are enclosed to form a front test cavity (101), and the front test cavity (101) is suitable for the propagation of the first light beam (401); the back battery side of the battery body (20) and the inner wall of the test box (10) are enclosed to form a back test cavity (102), and the back test cavity (102) is suitable for the propagation of the second light beam (402).

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