Photovoltaic module temperature coefficient test thermostat device

Abstract

The application relates to the technical field of constant-temperature boxes, and discloses a constant-temperature device for testing temperature coefficients of photovoltaic modules, which comprises a constant-temperature box, a heat-preservation shell fixedly connected to the side of the constant-temperature box, an illumination assembly and a fixing assembly movably connected to the inside of the constant-temperature box, a threaded connecting rod rotationally connected to the inside of the constant-temperature box, and a driving motor fixedly connected to the side of the threaded connecting rod; the constant-temperature box in the device is provided with two chambers, i.e. a high-temperature chamber and a low-temperature chamber; during use, samples can be quickly transferred between the two chambers, temperature switching is realized, the heating rate is improved through simultaneous heating of the upper and lower chambers, the temperature difference caused by heat convection can be partially offset, the natural convection speed is improved, the temperature distribution in the chamber is more uniform, a cleaning device is further arranged, dust is prevented from blocking and affecting the illumination intensity of light irradiated onto the photovoltaic module, and the light is more uniform through the auxiliary functions of the diffuse reflection plate, the partition plate and the light supplementing lamp.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of constant-temperature boxes, in particular to a photovoltaic module temperature coefficient test constant-temperature device. BACKGROUND

[0002] In actual application, the power generation performance of a photovoltaic power generation system is greatly affected by natural environmental conditions, a photovoltaic module is a main component of the photovoltaic power generation system, and the working temperature of the photovoltaic module is one of important factors affecting photovoltaic power generation.

[0003] The open-circuit voltage is determined by the band gap of a semiconductor and the Fermi level, and the Fermi level is closer to the valence band as the temperature is higher, so the open-circuit voltage is smaller as the temperature is higher, that is, the curve of the temperature-open-circuit voltage is approximately a straight line with a negative slope, which is called the open-circuit voltage temperature coefficient of a solar module in the process of solar module certification.

[0004] The relationship between the temperature and the short-circuit current is that the short-circuit current is larger as the temperature is higher. However, it should be noted that the trend of the short-circuit current is smaller than that of the open-circuit voltage, that is, the curve of the temperature-short-circuit current is a straight line with a slightly positive slope, which is called the short-circuit current temperature coefficient of a solar cell in the detection of solar module certification.

[0005] Publication No. CN217985003U discloses a photovoltaic module temperature coefficient test constant-temperature device, which belongs to the technical field of photovoltaic module testing and comprises a box body, a plurality of electric heating pipes, a heat dissipation fan, a temperature controller and a mounting frame. The plurality of electric heating pipes are arranged in parallel in the box body to form a vertical heating surface parallel to the photovoltaic module to be tested. The heat dissipation fan is installed on the top of the box body. The temperature controller is arranged in the box body. A plurality of buckles are arranged along the outer side of the box body to lock the mounting frame on which the photovoltaic module to be tested is mounted. The photovoltaic module temperature coefficient test constant-temperature device provided by the above patent adopts a plurality of electric heating pipes arranged in parallel, has a fast heating speed, can control the temperature according to the standard required temperature rise step, promotes internal circulation with the help of the heat dissipation fan, makes the temperature in the box body uniform, can realize rapid rise and fall of the temperature in the box body, constructs a temperature environment meeting the testing requirements, and improves the accuracy of photovoltaic module temperature coefficient testing.

[0006] In the use process of the above device, the bottom electric heating pipe is used for heating, and then the fan is used for promoting internal circulation to balance the temperature inside the box body. However, this mode causes a significant temperature gradient when heat is transferred from the bottom to the top, resulting in uneven surface temperature of the module, affecting the testing accuracy, the forced convection of the fan may cause local wind speed difference, further exacerbating the uneven temperature distribution, and the combination of bottom heating and fan diffusion has a slow response speed to temperature change, and it is difficult to quickly reach and stabilize at the set temperature. SUMMARY

[0007] In order to overcome the above-mentioned defects of the prior art, the present application provides a photovoltaic module temperature coefficient test constant temperature device to solve the problems existing in the background art.

[0008] The present application provides the following technical scheme: a photovoltaic module temperature coefficient test constant temperature device, comprising a constant temperature box, the side of the constant temperature box is fixedly connected with a heat preservation shell, the inside of the constant temperature box is movably connected with an illumination assembly and a fixed assembly, the inside of the constant temperature box is rotatably connected with a threaded connecting rod, the side of the threaded connecting rod is fixedly connected with a driving motor;

[0009] The illumination assembly comprises a top connecting plate, the top connecting plate is fixedly connected with a connecting seat, the side of the connecting seat is rotatably connected with a threaded rod, the inside of the connecting seat is provided with a motor, the motor output shaft is fixedly connected with the threaded rod, the threaded rod is threadedly connected with a cleaning assembly, and the bottom of the top connecting plate is fixedly connected with an illumination lamp;

[0010] The constant temperature box comprises a bottom plate and a top plate, the inside of the constant temperature box is provided with two groups of first heating assemblies and second heating assemblies, one group of the first heating assemblies and the second heating assemblies is arranged in the inside of the bottom plate, and the other group is arranged in the top plate, the power of the group arranged in the top plate is three quarters of that of the group arranged in the inside of the bottom plate, the top of the bottom plate is fixedly connected with a first flow guide plate, the top of the first flow guide plate is fixedly connected with a cover plate, the top of the cover plate is fixedly connected with a limiting slide block, the cover plate and the first flow guide plate are both provided with a mounting groove, the bottom of the top plate is fixedly connected with a second flow guide plate, and the first flow guide plate and the second flow guide plate are both provided with a plurality of air outlets.

[0011] Further, the side of the constant temperature box is movably connected with a measurement data line, the constant temperature box is provided with a power socket, the power socket is arranged at the bottom of the measurement data line, and the two sides of the constant temperature box are both fixedly connected with heat dissipation fans.

[0012] Further, the shape of the air outlet is hexagonal or octagonal, which can effectively reduce the dead angle area, thereby improving the uniformity of the temperature, the inside of the air outlet is provided with a ventilation groove, the ventilation groove adopts a tapered structure, the bottom opening is large, the top opening is small, the tapered air duct changes the cross-sectional area of the channel, optimizes the flow velocity distribution through the change of the cross-sectional area, and effectively improves the uniformity of the wind speed by using the principle of fluid mechanics.

[0013] Further, the fixed assembly comprises a support frame, the support frame is fixedly connected with a test platform, a combined hydraulic assembly is movably connected between the support frame and the test platform, the top of the combined hydraulic assembly is fixedly connected with a top temperature detector, the side of the combined hydraulic assembly is fixedly connected with a bottom temperature detector, and the test platform is provided with a limiting groove.

[0014] Further, the test platform is provided with a fixing groove and a data interface, the data interface is arranged on the inner side of the fixing groove, the bottom of the support frame is provided with a movable groove, the side of the support frame is fixedly connected with a heat insulation plate, the bottom of the support frame is fixedly connected with a connecting assembly, and the connecting assembly is threadedly connected with a threaded connecting rod.

[0015] During the test, the threaded connecting rod drives the fixing assembly to move horizontally through the connecting assembly and moves back and forth between the two boxes in the thermostat, and the combined hydraulic assembly is used to adjust the height of the top temperature detector and the length of the bottom temperature detector, so as to perform multi-point temperature detection on the photovoltaic assembly during the test.

[0016] Further, the bottom of the light assembly is fixedly connected with a connecting rod, the connecting rod and the limiting groove are movably connected, and the connecting rod and the limiting groove cooperate to quickly adjust the position, the top of the top connecting plate is provided with a hydraulic lifting device, the hydraulic lifting device is fixedly connected with the thermostat, and the height of the light assembly is adjusted.

[0017] Further, the light lamp comprises a fixed plate, the fixed plate is fixedly connected with the second guide plate, the bottom of the fixed plate is fixedly connected with a lifting rod, the bottom of the lifting rod is fixedly connected with a lighting lamp, the side of the lighting lamp is provided with a diffuse reflection plate, the bottom of the diffuse reflection plate is fixedly connected with a partition plate, the bottom of the partition plate is fixedly connected with a transparent cover plate, the transparent cover plate is fixedly connected with the thermostat, the inner wall of the diffuse reflection plate is made of polytetrafluoroethylene, and the partition plate is fixedly connected with a light supplementing lamp.

[0018] During use, the photovoltaic assembly is placed on the fixing groove of the fixing assembly, the hydraulic lifting device controls the downward movement of the top connecting plate, the light lamp is located directly above the fixing groove through the cooperation of the connecting rod and the limiting groove, the motor in the connecting seat drives the threaded rod to rotate, the threaded rod drives the cleaning assembly to move horizontally, and the surface of the light lamp and the photovoltaic assembly is cleaned to prevent dust from blocking and affecting the light intensity irradiated onto the photovoltaic assembly, the height of the lighting lamp is adjusted through the lifting rod, the light of the lighting lamp can cover the surface of the photovoltaic assembly, the diffuse reflection plate reflects the light emitted by the lighting lamp, the light of the lighting lamp is more uniform, and the light supplementing lamp in the corner of the partition plate can supplement light, so that the photovoltaic assembly receives more uniform light during the test.

[0019] Further, the side of the thermostat is fixedly connected with a control assembly, an inside of the control assembly is provided with a control system, including a temperature control unit, a humidity control unit, an illumination intensity control unit, a motor control unit and a hydraulic control unit.

[0020] Technical effects and advantages of the present application:

[0021] 1. The photovoltaic module temperature coefficient test thermostat device, the thermostat in the device is provided with two chambers of high temperature chamber and low temperature chamber, in the use process, the sample can be quickly transferred between the two box bodies, the temperature is quickly switched, and the heating rate is improved through the simultaneous heating of the upper and lower, the temperature difference caused by the heat convection can be partially offset, the temperature distribution in the box is more uniform, the energy efficiency ratio of the thermostat is improved, and the operation cost is reduced.

[0022] 2. The photovoltaic module temperature coefficient test thermostat device, the air outlet can increase the speed of the gas entering the inside from the ventilation groove in the use process, so that the speed of the natural convection of the gas in the thermostat is accelerated, the period of air circulation is shortened, the temperature distribution is more uniform during heating, the tapered air duct changes the sectional area of the passage, the flow velocity distribution is optimized through the sectional area change, and the uniformity of the wind speed is effectively improved by using the principle of fluid mechanics.

[0023] 3. The photovoltaic module temperature coefficient test thermostat device, the device is provided with a cleaning assembly, the surface of the light lamp and the photovoltaic module is cleaned during use, dust is prevented from being blocked to affect the illumination intensity of the light irradiated onto the photovoltaic module, and the height of the lighting lamp is adjusted through the lifting rod, so that the light of the lighting lamp can cover the surface of the photovoltaic module, and the light is more uniform through the auxiliary of the diffuse reflection plate and the partition plate. DETAILED DESCRIPTION

[0024] Figure 1 It is a structure schematic view of the photovoltaic module temperature coefficient test thermostat device provided by the present application;

[0025] Figure 2 It is an internal structure schematic view of the photovoltaic module temperature coefficient test thermostat device provided by the present application;

[0026] Figure 3 It is an internal structure schematic view of the thermostat of the photovoltaic module temperature coefficient test thermostat device provided by the present application;

[0027] Figure 4 It is an air outlet structure schematic view of the photovoltaic module temperature coefficient test thermostat device provided by the present application;

[0028] Figure 5 It is a fixed assembly structure schematic view of the photovoltaic module temperature coefficient test thermostat device provided by the present application;

[0029] Figure 6 This is a schematic diagram of the structure of a photovoltaic module temperature coefficient testing constant temperature device proposed in this invention;

[0030] Figure 7 This is a schematic diagram of the illumination lamp structure of a constant temperature device for testing the temperature coefficient of photovoltaic modules proposed in this invention.

[0031] The components include: 1. Constant temperature chamber; 101. Base plate; 102. No. 1 guide plate; 103. Cover plate; 104. No. 1 heating component; 105. No. 2 heating component; 106. Air outlet; 107. Mounting slot; 108. No. 2 guide plate; 109. Top plate; 110. Ventilation slot; 2. Insulation shell; 3. Control components; 4. Power socket; 5. Cooling fan; 6. Measurement data cable; 7. Illumination component; 701. Top connecting plate; 702. Connecting rod; 703. Connecting seat; 704. Threaded rod; 705. Cleaning component; 706. Illumination lamp; 7061. 7061. Fixed plate; 7062. Diffuse reflector; 7063. Partition; 7064. Transparent cover; 7065. Lifting rod; 7066. Lighting lamp; 7067. Supplementary light; 8. Fixed assembly; 801. Support frame; 802. Test platform; 803. Combined hydraulic assembly; 804. Fixed groove; 805. Limiting groove; 806. Data interface; 807. Connecting assembly; 808. Heat insulation plate; 809. Top temperature detector; 810. Bottom temperature detector; 811. Movable groove; 9. Limiting slider; 10. Threaded connecting rod; 11. Drive motor. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, those skilled in the art who have not made any innovative embodiments are all within the scope of protection of the present invention.

[0033] Please see Figures 1-2 , Figures 6-7 A constant temperature device for testing the temperature coefficient of photovoltaic modules includes a constant temperature chamber 1, an insulation shell 2 fixedly connected to the side of the constant temperature chamber 1, a light-emitting module 7 and a fixing module 8 movably connected inside the constant temperature chamber 1, a threaded connecting rod 10 rotatably connected inside the constant temperature chamber 1, and a drive motor 11 fixedly connected to the side of the threaded connecting rod 10.

[0034] The illumination assembly 7 comprises a top connecting plate 701, a connecting seat 703 fixedly connected to the top connecting plate 701, a threaded rod 704 rotatably connected to the side of the connecting seat 703, a motor arranged in the connecting seat 703, a threaded rod 704 fixedly connected to the output shaft of the motor, a cleaning assembly 705 threadedly connected to the threaded rod 704, and an illumination lamp 706 fixedly connected to the bottom of the top connecting plate 701.

[0035] The bottom of the illumination assembly 7 is fixedly connected with a connecting rod 702, the connecting rod 702 and the limiting groove 805 are movably connected, and the connecting rod 702 and the limiting groove 805 cooperate to quickly adjust the positions of the illumination assembly 7 and the fixing assembly 8. The top of the top connecting plate 701 is provided with a hydraulic lifting device, and the hydraulic lifting device is fixedly connected with the thermostat 1 and used for adjusting the height of the illumination assembly 7.

[0036] The illumination lamp 706 comprises a fixed plate 7061, the fixed plate 7061 is fixedly connected with the second guide plate 108, the bottom of the fixed plate 7061 is fixedly connected with a lifting rod 7065, the bottom of the lifting rod 7065 is fixedly connected with an illuminating lamp 7066, the side of the illuminating lamp 7066 is provided with a diffuse reflection plate 7062, the bottom of the diffuse reflection plate 7062 is fixedly connected with a partition plate 7063, the bottom of the partition plate 7063 is fixedly connected with a transparent cover plate 7064, the transparent cover plate 7064 is fixedly connected with the thermostat 1, the inner wall of the diffuse reflection plate 7062 is made of polytetrafluoroethylene, and the partition plate 7063 is fixedly connected with a light supplementing lamp 7067.

[0037] It is necessary to be particularly explained in the embodiment that, in the use process, the photovoltaic assembly is placed at the fixing groove 804 on the fixing assembly 8, the hydraulic lifting device controls the downward movement of the top connecting plate 701, the illumination lamp 706 is located directly above the fixing groove 804 through the cooperation of the connecting rod 702 and the limiting groove 805, the motor in the connecting seat 703 drives the threaded rod 704 to rotate, the threaded rod 704 drives the cleaning assembly 705 to move horizontally, the illumination lamp 706 and the surface of the photovoltaic assembly are cleaned, dust is prevented from blocking and affecting the illumination intensity of the light irradiated onto the photovoltaic assembly, the height of the illuminating lamp 7066 is adjusted through the lifting rod 7065, the light of the illuminating lamp 7066 can cover the surface of the photovoltaic assembly, the diffuse reflection plate 7062 reflects the light emitted by the illuminating lamp 7066, the illumination of the illuminating lamp 7066 is more uniform, and the light supplementing lamp 7067 can supplement light for the corner of the partition plate 7063, so that the photovoltaic assembly is irradiated more uniformly during the test.

[0038] Please refer to Figure 2 , Figure 5The fixed assembly 8 comprises a support frame 801, the support frame 801 is fixedly connected with a test platform 802, a combined hydraulic assembly 803 is movably connected between the support frame 801 and the test platform 802, a top temperature detector 809 is fixedly connected to the top of the combined hydraulic assembly 803, a bottom temperature detector 810 is fixedly connected to the side of the combined hydraulic assembly 803, and a limiting groove 805 is formed in the test platform 802.

[0039] The test platform 802 is provided with a fixed groove 804 and a data interface 806, the data interface 806 is arranged on the inner side of the fixed groove 804, the bottom of the support frame 801 is provided with a movable groove 811, the side of the support frame 801 is fixedly connected with a heat insulation plate 808, the bottom of the support frame 801 is fixedly connected with a connecting assembly 807, the connecting assembly 807 is threadedly connected with a threaded connecting rod 10, the threaded connecting rod 10 is driven to rotate by a driving motor 11, and then the fixed assembly 8 is driven to move horizontally in the inside of the thermostat 1.

[0040] It should be particularly pointed out in the embodiment that, in the test process, the threaded connecting rod 10 is driven to rotate by the driving motor 11, the threaded connecting rod 10 drives the fixed assembly 8 to move horizontally by the connecting assembly 807, and the fixed assembly 8 moves back and forth between the two boxes in the inside of the thermostat 1, the combined hydraulic assembly 803 is used for adjusting the height of the top temperature detector 809 and the length of the bottom temperature detector 810, so that the photovoltaic assembly is subjected to multi-point temperature detection in the test, the photovoltaic assembly is connected with the data interface 806 through a line, and is used for directly measuring the short-circuit current and the open-circuit voltage, and the heat insulation plate 808 is used for improving the heat preservation effect.

[0041] Please refer to Figure 1 、 Figures 3-4 The thermostat 1 comprises a bottom plate 101 and a top plate 109, the inside of the thermostat 1 is provided with two groups of a first heating assembly 104 and a second heating assembly 105, one group of the first heating assembly 104 and the second heating assembly 105 is arranged in the inside of the bottom plate 101, and the other group is arranged in the top plate 109, the power of the group arranged in the top plate 109 is three-fourths of the power of the group arranged in the inside of the bottom plate 101, the top of the bottom plate 101 is fixedly connected with a first flow guide plate 102, the top of the first flow guide plate 102 is fixedly connected with a cover plate 103, the top of the cover plate 103 is fixedly connected with a limiting sliding block 9, the cover plate 103 and the first flow guide plate 102 are both provided with a mounting groove 107, the bottom of the top plate 109 is fixedly connected with a second flow guide plate 108, and the first flow guide plate 102 and the second flow guide plate 108 are both provided with a plurality of air outlets 106.

[0042] Further, the shape of the air outlet 106 is hexagonal or octagonal, which can effectively reduce the dead angle area, thereby improving the uniformity of temperature. The air outlet 106 is internally provided with a ventilation groove 110, which adopts a tapered structure, that is, the bottom opening is large, and the top opening is small. The tapered air duct changes the cross-sectional area of the channel, optimizes the flow velocity distribution through the change of the cross-sectional area, and effectively improves the uniformity of the air speed by using the principle of fluid mechanics.

[0043] It needs to be specifically explained in the embodiment that, in the use process, the heating rate is improved by heating up and down at the same time. In a closed constant-temperature box, hot air rises naturally, and cold air sinks, forming a temperature gradient in the vertical direction. If only the bottom is heated, the temperature at the top may be too high due to the accumulation of hot air, resulting in a too large temperature difference in the vertical direction. By setting the heating power at the top to be three-fourths of that at the bottom, the temperature difference caused by the heat convection can be partially offset, so that the temperature distribution in the box is more uniform. The differential heating power design can avoid unnecessary energy waste, help to improve the energy efficiency ratio of the constant-temperature box, and reduce the operating cost.

[0044] In the use process, the air outlet 106 can increase the speed of the gas entering the internal gas from the ventilation groove 110, thereby accelerating the speed of the natural convection of the internal gas of the constant-temperature box 1, shortening the cycle of air circulation, and making the temperature distribution more uniform during heating. The constant-temperature box usually relies on heat radiation or heat conduction to achieve uniform heating. The forced convection introduced by the fan may destroy this balance, which is manifested as the temperature on the side close to the fan being lower than that on the side far from the fan, resulting in an increased temperature gradient in different regions of the component. At the same time, the air flow of the fan may interfere with the heat conduction between the component and the constant-temperature box, so that the component cannot uniformly absorb heat, resulting in distortion of the temperature measurement. The device accelerates the natural convection speed to replace the fan forced convection to uniformly blow hot air over the surface of the photovoltaic component, thereby improving the accuracy of the measurement results.

[0045] Please refer to Figures 1-7 The device is provided with a high-temperature chamber and a low-temperature chamber. In the use process, the sample can be quickly transferred between the two box bodies, realizing rapid switching from high temperature to low temperature (or from low temperature to high temperature). This rapid temperature impact test can more realistically simulate the extreme temperature change environment encountered by the photovoltaic component in actual use, thereby more accurately evaluating the temperature coefficient thereof. At the same time, the low-temperature chamber can also serve as a preheating chamber to preheat through the low-temperature chamber before high-temperature testing, so as to eliminate the water vapor on the surface of the photovoltaic component.

[0046] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A constant temperature device for testing temperature coefficient of photovoltaic module, comprising a constant temperature oven (1), characterized in that: The side of the thermostat (1) is fixedly connected with a heat preservation shell (2), the inside of the thermostat (1) is movably connected with an illumination assembly (7) and a fixed assembly (8), the inside of the thermostat (1) is rotatably connected with a threaded connecting rod (10), the side of the threaded connecting rod (10) is fixedly connected with a driving motor (11); The illumination assembly (7) comprises a top connecting plate (701), the top connecting plate (701) is fixedly connected with a connecting seat (703), the side of the connecting seat (703) is rotatably connected with a threaded rod (704), the inside of the connecting seat (703) is provided with a motor, the motor output shaft is fixedly connected with the threaded rod (704), the threaded rod (704) is threadedly connected with a cleaning assembly (705), the bottom of the top connecting plate (701) is fixedly connected with an illumination lamp (706); The thermostat (1) comprises a bottom plate (101) and a top plate (109), the inside of the thermostat (1) is provided with two groups of a first heating assembly (104) and a second heating assembly (105), one group of the first heating assembly (104) and the second heating assembly (105) is arranged in the inside of the bottom plate (101), and the other group is arranged in the top plate (109), the power of the group arranged in the top plate (109) is three fourths of that of the group arranged in the inside of the bottom plate (101), the top of the bottom plate (101) is fixedly connected with a first flow guide plate (102), the top of the first flow guide plate (102) is fixedly connected with a cover plate (103), the top of the cover plate (103) is fixedly connected with a limiting sliding block (9), the cover plate (103) and the first flow guide plate (102) are both provided with a mounting groove (107), the bottom of the top plate (109) is fixedly connected with a second flow guide plate (108), and the first flow guide plate (102) and the second flow guide plate (108) are both provided with a plurality of air outlets (106).

2. The constant temperature device for testing temperature coefficient of photovoltaic module according to claim 1, characterized in that: The side of the thermostat (1) is movably connected with a measurement data line (6), the thermostat (1) is provided with a power jack (4), the power jack (4) is arranged at the bottom of the measurement data line (6), and the two sides of the thermostat (1) are both fixedly connected with a heat dissipation fan (5).

3. The constant temperature device for testing temperature coefficient of photovoltaic module according to claim 1, characterized in that: The shape of the air outlet (106) is hexagonal or octagonal, the inside of the air outlet (106) is provided with a ventilation groove (110), and the ventilation groove (110) adopts a tapering structure, that is, the bottom opening is large, and the top opening is small.

4. The constant temperature device for testing temperature coefficient of photovoltaic module according to claim 1, characterized in that: The fixed assembly (8) comprises a support frame (801), the support frame (801) is fixedly connected with a test platform (802), the support frame (801) and the test platform (802) are movably connected with a combined hydraulic assembly (803), the top of the combined hydraulic assembly (803) is fixedly connected with a top temperature detector (809), the side of the combined hydraulic assembly (803) is fixedly connected with a bottom temperature detector (810), and the test platform (802) is provided with a limiting groove (805).

5. The constant temperature device for testing temperature coefficient of photovoltaic module according to claim 4, characterized in that: The test platform (802) is provided with a fixing groove (804) and a data interface (806), the data interface (806) is arranged on the inner side of the fixing groove (804), the bottom of the support frame (801) is provided with a movable groove (811), the side of the support frame (801) is fixedly connected with a heat insulation plate (808), the bottom of the support frame (801) is fixedly connected with a connecting assembly (807), and the connecting assembly (807) is connected with the threaded connecting rod (10) through threads.

6. The constant temperature device for testing temperature coefficient of photovoltaic module according to claim 5, characterized in that: The bottom of the illumination assembly (7) is fixedly connected with a connecting rod (702), the connecting rod (702) is movably connected with a limiting groove (805), the top of the top connecting plate (701) is provided with a hydraulic lifting device, and the hydraulic lifting device is fixedly connected with the thermostat (1).

7. The constant temperature device for testing temperature coefficient of photovoltaic module according to claim 6, characterized in that: The illumination lamp (706) comprises a fixed plate (7061), the fixed plate (7061) is fixedly connected with the second guide plate (108), the bottom of the fixed plate (7061) is fixedly connected with a lifting rod (7065), the bottom of the lifting rod (7065) is fixedly connected with an illuminating lamp (7066), the side of the illuminating lamp (7066) is provided with a diffuse reflection plate (7062), the bottom of the diffuse reflection plate (7062) is fixedly connected with a partition plate (7063), the bottom of the partition plate (7063) is fixedly connected with a transparent cover plate (7064), the transparent cover plate (7064) is fixedly connected with the thermostat (1), the inner wall of the diffuse reflection plate (7062) is made of polytetrafluoroethylene, and the partition plate (7063) is fixedly connected with a light supplementing lamp (7067).

8. The constant temperature device for testing temperature coefficient of photovoltaic module according to claim 1, characterized in that: The side of the thermostat (1) is fixedly connected with a control assembly (3), the inside of the control assembly (3) is provided with a control system, comprising a temperature control unit, a humidity control unit, an illumination intensity control unit, a motor control unit and a hydraulic control unit.

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