Test base and solar test device

Abstract

The application relates to a test base and a solar test device. The test base comprises a base, a phase change module and a heating module. The base is provided with a bearing surface for bearing a to-be-tested piece. The phase change module is thermally coupled with the base. The phase change module comprises a phase change medium configured to adjust the temperature of the base by phase change heat absorption or heat release. The heating module is thermally coupled with the base and used for heating the base. The phase change module and the heating module are combined. When the temperature of the base exceeds the phase change temperature of the phase change medium, the phase change medium absorbs heat. When the temperature of the base is lower than the phase change temperature of the phase change medium, the phase change material releases heat. The test base provided by the application can realize accurate, efficient and energy-saving base temperature control and can realize the test work on the solar cell.

Description

Technical Field

[0001] This application relates to the field of solar energy testing technology, and in particular to test bases and solar energy testing devices. Background Technology

[0002] As a green energy source, solar energy requires precise measurement of electrical performance in the development, production, and reliability testing of its cells. During testing, especially when measuring high current and reverse voltage, the cell temperature is prone to rise, significantly affecting the accuracy of parameters such as voltage and efficiency. To obtain accurate battery electrical performance data, the temperature of the test platform must be precisely controlled.

[0003] Currently, temperature control solutions for test bases mainly employ traditional heating elements for heating and heat dissipation through fans, water cooling, or semiconductors for temperature control. Air cooling, using fans, suffers from high noise and low heat dissipation efficiency, making it difficult to meet the requirements of high-precision temperature control. Water cooling relies on liquid circulation for heat dissipation, posing a risk of leakage that could damage equipment or interrupt testing. Semiconductor cooling uses semiconductor devices for temperature control, but it has high energy consumption, limited power, cannot achieve rapid cooling, and is expensive. These devices cannot simultaneously meet the requirements of high-precision, high-efficiency, and high-safety temperature control. Utility Model Content

[0004] Based on this, a test platform and a solar energy testing device are provided to solve the problem that existing test platforms cannot simultaneously meet the requirements of accurate, efficient, and energy-saving temperature control.

[0005] An embodiment of the first aspect of this application provides a test platform, comprising:

[0006] A base, wherein the base is provided with a bearing surface, the bearing surface being used to bear the test piece;

[0007] A phase change module is thermally coupled to the base; the phase change module includes a phase change medium configured to regulate the temperature of the base by absorbing or releasing heat through phase change.

[0008] A heating module, which is thermally coupled to the base, is used to heat the base.

[0009] In one embodiment, the phase change module includes:

[0010] A phase change filling cavity is formed within the base and is used to fill the phase change medium.

[0011] In one embodiment, the phase change medium comprises paraffin.

[0012] In one embodiment, the phase change module further includes:

[0013] A replacement port is provided on the outer wall of the base and connected to the phase change filling cavity for replacing the phase change medium.

[0014] In one embodiment, the heating module includes:

[0015] A heating wire is disposed within the base and close to the phase change filling cavity.

[0016] In one embodiment, the heating module further includes:

[0017] An insulating layer that covers the heating wire;

[0018] Several insulating fasteners are provided to fix the heating wire to the base.

[0019] In one embodiment, the test platform further includes:

[0020] The temperature control module includes a temperature monitoring unit and a control unit. The temperature monitoring unit is used to monitor the temperature of the bearing surface and the temperature of the phase change filling cavity. The temperature monitoring unit is communicatively connected to the control unit.

[0021] The control unit is communicatively connected to the phase change module and / or the heating module, and is used to control the operation of the phase change module and / or the heating module according to the temperature of the bearing surface and the temperature of the phase change filling cavity.

[0022] In one embodiment, the test platform further includes:

[0023] A cooling module is thermally coupled to the base and communicatively connected to the temperature control module, which is used to control the operation of the cooling module.

[0024] In one embodiment, the test platform further includes:

[0025] A plurality of vacuum adsorption holes are disposed on the bearing surface for adsorbing the test piece;

[0026] A vacuum channel, which is connected to the vacuum adsorption hole, is used to provide negative pressure to the vacuum adsorption hole.

[0027] An embodiment of the second aspect of this application provides a solar energy testing apparatus, including the test platform described in any of the above embodiments.

[0028] According to the test base and solar energy testing device of this application embodiment, the phase change module and heating module are combined. When the base temperature exceeds the phase change temperature of the phase change medium, the phase change medium absorbs heat; when the base temperature is lower than the phase change temperature of the phase change medium, the phase change material releases heat. The base temperature can be controlled within a very small fluctuation range, improving the reliability and accuracy of the test results, while the temperature adjustment is rapid. Temperature regulation through the phase change medium has a significant energy-saving effect. When the temperature changes, the state of the phase change medium changes first, reducing the energy consumption of the heating module. To a certain extent, heat recovery and reuse are achieved, reducing overall energy consumption. Compared with semiconductor refrigeration, the structure is simple and the maintenance cost is low. The test base provided by this application embodiment achieves precise, efficient, and energy-saving base temperature control, enabling the testing of solar cells. The solar energy testing device directly utilizes the above-mentioned functions of the test base, eliminating the need for repeated design of temperature control and fixing structures, simplifying the overall architecture of the device, providing a stable temperature environment and reliable mechanical fixation for solar energy testing, and adapting to the testing of different types and testing standards of solar cells, improving the versatility of solar energy testing, and ultimately achieving reliable and efficient evaluation of solar cell performance. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a test base according to an embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the structure of a test base embodying a heating wire and a phase change filling cavity, according to an embodiment of this application.

[0031] Figure label:

[0032] 100. Base; 110. Bearing surface;

[0033] 200. Phase change module; 210. Phase change filling cavity; 220. Replacement port;

[0034] 300. Heating module; 310. Heating wire;

[0035] 400. Temperature control module; 410. Temperature monitoring unit; 420. Control unit;

[0036] 500. Cooling module; 510. Cooling water tank; 520. Water pump; 530. Heat sink;

[0037] 700, Vacuum adsorption pore; 710, Vacuum channel;

[0038] 800, power supply. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] See Figure 1 and Figure 2 At least one embodiment of this application provides a test base 100, which includes a base 100, a phase change module 200, and a heating module 300. The base 100 is provided with a bearing surface 110 for bearing the test piece. The phase change module 200 is thermally coupled to the base 100. The phase change module 200 includes a phase change medium configured to regulate the temperature of the base 100 by absorbing or releasing heat through phase change. The heating module 300 is thermally coupled to the base 100 for heating the base 100.

[0046] According to the test base 100 of this application embodiment, the phase change module 200 and the heating module 300 are combined. When the temperature of the base 100 exceeds the phase change temperature of the phase change medium, the phase change medium absorbs heat; when the temperature of the base 100 is lower than the phase change temperature of the phase change medium, the phase change material releases heat. The temperature of the base 100 can be controlled within a very small fluctuation range, improving the reliability and accuracy of the test results, while the temperature adjustment is rapid. Temperature regulation through the phase change medium has a significant energy-saving effect. When the temperature changes, the state of the phase change medium changes first, reducing the energy consumption of the heating module 300. To a certain extent, heat recovery and reuse are achieved, reducing overall energy consumption. Compared with semiconductor refrigeration, the structure is simple and the maintenance cost is low. The test base 100 provided in this application embodiment achieves precise, efficient, and energy-saving temperature control of the base 100, enabling the testing of solar cells.

[0047] In some embodiments, the base 100 has good thermal conductivity, thermal conductivity and mechanical stability, such as aluminum alloy or copper alloy, to ensure that heat can be conducted quickly and evenly within the base 100.

[0048] In some embodiments, the phase change module 200 includes a phase change filling cavity 210, which is formed within the base 100 and used to fill the phase change medium. Specifically, the phase change filling cavity 210 is positioned directly below the bearing surface 110 of the base 100, forming a relatively enclosed, insulated area that is in close contact with the base 100. The shape of the phase change filling cavity 210 matches the shape of the base 100 to ensure good thermal coupling, enabling it to have good thermal interaction with the base 100, allowing the phase change medium to fully absorb and release heat from the base 100, thereby achieving precise temperature control.

[0049] Based on the temperature range required for testing the test specimen, a phase change material with a suitable phase change temperature is selected as the phase change medium. The phase change medium is uniformly filled within the phase change filling cavity 210, ensuring a tight fit between the phase change medium and the base 100 to achieve efficient phase change exchange. When the temperature of the base 100 rises, the phase change medium absorbs heat and melts, storing the heat to suppress a rapid temperature rise in the base 100, thus achieving a cooling effect. Conversely, when the temperature of the base 100 decreases, the phase change medium releases heat and solidifies, transferring the stored heat to the base 100, slowing down the temperature drop in the base 100.

[0050] In this embodiment, thermal coupling refers to the connection between the phase change module 200 or the heating module 300 and the base 100 through direct contact or structural design to achieve efficient heat transfer, ensuring that heat can be exchanged quickly and stably between related components, thereby realizing temperature regulation or control functions.

[0051] Specifically, in the thermal coupling relationship between the base 100 and the phase change module 200, the phase change filling cavity 210 of the phase change module 200 is located inside the base 100, that is, directly below the bearing surface 110, and is in close contact with the base 100 to form a closed area. This design allows the heat of the base 100 to be directly transferred to the phase change medium in the phase change filling cavity 210, or the heat released by the phase change medium to be directly conducted to the base 100.

[0052] In some embodiments, the phase change medium includes paraffin. Specifically, different phase change media are suitable for different temperature control ranges, and phase change media of different materials can be selected to achieve different temperature controls.

[0053] Furthermore, the phase change medium can be configured as a phase change medium made of PCM-A-25 paraffin-based phase change material, with a phase change temperature of 25°C and a high latent heat value. It is particularly suitable for use in solar cells under standard testing conditions of 25°C.

[0054] In some embodiments, the phase change module 200 further includes a replacement port 220, which is located on the outer wall of the base 100 and connected to the phase change filling cavity 210, for replacing the phase change medium. The phase change material can be replaced through the replacement port 220 to meet different temperature control requirements.

[0055] Specifically, the replacement port 220 provides a convenient channel for replacing the phase change medium. Since different phase change media have different phase change temperatures, replacing the medium with one corresponding to the phase change temperature through the replacement port 220 allows the test base 100 to meet the specific temperature requirements of different test pieces or adapt to temperature control needs in different environments. During replacement, the heating module 300 heats the base 100 and the phase change filling cavity 210 to the phase change point of the current phase change medium, causing the solid phase change medium to melt into a liquid state. The liquid medium is then discharged through the replacement port 220. After the old medium is emptied, a new phase change medium is injected through the replacement port 220. After the replacement is complete, the replacement port 220 is resealed. This operation utilizes the reversible phase change characteristics between the solid and liquid states of the phase change medium, making the replacement process smoother and more thorough.

[0056] The above settings solve the problem that a single phase change medium cannot adapt to multiple temperature testing scenarios. Through low-cost structural improvements, the applicability of the test base 100 is expanded. At the same time, the high cost of replacing the entire base 100 or phase change module 200 due to changes in temperature control requirements is avoided, thus balancing functionality and economy.

[0057] Understandably, when there is no need to replace the phase change medium, the replacement port 220 is sealed to prevent leakage of the phase change medium or the entry of external impurities, thus ensuring the normal operation of the phase change module 200.

[0058] In some embodiments, the heating module 300 includes a heating wire 310 disposed within the base 100 and close to the phase change filling cavity 210.

[0059] Specifically, in the thermal coupling relationship between the base 100 and the heating module 300, the heating wire 310 of the heating module 300 is located inside the base 100 and close to the phase change filling cavity 210, ensuring that the heat generated by the heating wire 310 can be quickly transferred to the base 100. When the phase change medium has insufficient adjustment capability, the heat can be quickly supplemented through thermal coupling to avoid the temperature of the base 100 deviating excessively from the target value.

[0060] Understandably, the heating characteristics of the heating wire 310 and its layout in the base 100 directly affect the uniformity of heat transfer and the rate of heating. The interaction with the phase change medium is crucial for achieving stable temperature control.

[0061] In some embodiments, the heating wire 310 is selected from materials with high resistivity, good high-temperature resistance, and suitable heating power, such as nickel-chromium alloy wire or carbon fiber heating wire 310. The length, diameter, and winding method of the heating wire 310 are determined according to the size of the base 100 and the required heating power to achieve a rapid and uniform heating effect.

[0062] In some embodiments, the heating wire 310 is configured as a carbon fiber heating wire 310, which has the characteristics of uniform heating, fast speed, good flexibility, corrosion resistance, high temperature resistance, low electromagnetic interference, and energy saving.

[0063] In some embodiments, the heating wire 310 is disposed around the periphery of the phase change filling cavity 210. As the core heating component of the heating module 300, the heating wire 310 is positioned around the outer periphery of the phase change filling cavity 210, forming a surrounding layout. This layout is not a simple physical enclosure, but rather adapts the direction of the heating wire 310 to the shape of the phase change filling cavity 210, such as spiral encirclement or parallel arrangement, ensuring that the heating wire 310 maintains a relatively close distance to the phase change filling cavity 210 and that heat can evenly cover the periphery of the cavity. The surrounding layout allows the heat generated by the heating wire 310 to be transferred from multiple directions within the phase change filling cavity 210 to the phase change medium inside the cavity and the outer base 100, avoiding localized overheating or uneven heating and ensuring a stable overall temperature rise of the base 100. In addition, the phase change filling cavity 210 is tightly coupled to the base 100. The heating wire 310 is arranged around the phase change filling cavity 210 to avoid direct short circuit with the base 100. At the same time, the high thermal conductivity of the base 100 is used to evenly diffuse heat to the bearing surface 110, ensuring the temperature of the test piece is stable.

[0064] With the above configuration, compared to the design where the heating wires 310 are dispersed or far away from the phase change filling cavity 210, this layout can reduce the heat transfer path, reduce energy loss, and make the heating module 300's heat replenishment function more accurate and efficient. Especially in low-temperature environments, it can quickly respond to the instructions of the temperature control module 400, and with the adjustment effect of the phase change medium, stabilize the temperature of the base 100 within the target range.

[0065] In some embodiments, the heating module 300 further includes an insulating layer and a plurality of insulating fasteners, the insulating layer covering the heating wire 310; the insulating fasteners fix the heating wire 310 to the base 100.

[0066] Specifically, an insulating layer covers the outside of the heating wire 310 and is made of high-temperature resistant and highly insulating materials, such as high-temperature resistant ceramic coatings or silicone rubber sleeves, directly wrapping the heating wire 310 to form a physical isolation layer. Although the insulating layer blocks the current, it allows heat to penetrate through thermal conduction, ensuring that the heat generated by the heating wire 310 can be continuously transferred to the base 100 and the phase change filling cavity 210 without affecting the heating function.

[0067] The insulating fasteners are connectors with insulating properties, such as ceramic clips or high-temperature resistant plastic brackets, which fix the heating wire 310 to the base 100 in a preset position and shape. This ensures the stable layout of the heating wire 310 within the base 100, preventing displacement, stacking, or loosening of the heating wire 310 due to equipment vibration or temperature changes, and ensuring uniform heating coverage. As a supplement to the insulation layer, the insulating fasteners themselves are non-conductive, further blocking the electrical connection between the heating wire 310 and the base 100, providing double protection against short circuits. By fixing the relative position of the heating wire 310 and the base 100, heat is evenly diffused from the heating wire 310 through the insulation layer, the gaps in the insulating fasteners, or the contact points with the base 100, avoiding localized heat concentration and ensuring uniform heating of the base 100.

[0068] The above settings prevent the heating wire 310 from short-circuiting directly with the base 100, while ensuring that the heat generated by the heating wire 310 can be evenly transferred to the base 100.

[0069] See Figure 1 In some embodiments, the test base 100 further includes a temperature control module 400, which includes a temperature monitoring unit 410 and a control unit 420. The temperature monitoring unit 410 monitors the temperature of the bearing surface 110 and the temperature of the phase change filling cavity 210, and is communicatively connected to the control unit 420. The control unit 420 is communicatively connected to the phase change module 200 and / or the heating module 300, and is used to control the operation of the phase change module 200 and / or the heating module 300 based on the temperature of the bearing surface 110 and the temperature of the phase change filling cavity 210. The control unit 420 receives the temperature signal fed back by the temperature monitoring unit 410 and operates according to a preset temperature and control algorithm. It monitors the temperature in real time and adjusts the operating state of the heating wire 310 promptly if the temperature exceeds the temperature control range of the phase change medium, ensuring that the temperature of the base 100 remains stable near the set value. The temperature monitoring unit 410 collects the temperature signals of the base 100 and the phase change medium in real time and feeds them back to the control unit 420. Based on the deviation between the set temperature value and the actual measured value, the control unit controls the heating of the heating wire 310 to achieve precise closed-loop control of the temperature of the base 100.

[0070] In some embodiments, the temperature monitoring unit 410 includes at least two sets of temperature sensors. One set of temperature sensors is disposed on the base 100 near the bearing surface 110 to monitor the actual operating temperature of the bearing surface 110 and the test piece. The other set of temperature sensors is disposed within the phase change filling cavity 210 to monitor the temperature state of the phase change medium and to connect the heat absorption and release of the phase change medium. To improve the accuracy of temperature measurement, each set of temperature sensors may include multiple temperature sensors.

[0071] Among them, the temperature sensor should be a temperature sensor with high accuracy, fast response and good stability and reliability, such as a thermocouple sensor or a resistance temperature detector (RTD) sensor, and its measurement accuracy should reach ±0.1℃-±0.5℃.

[0072] In some embodiments, the heating wire 310 is connected to the power supply 800 and the control unit 420 via wires. When the base 100 is overcooled beyond the regulating temperature of the phase change medium, the control unit 420 controls the power supply 800 to energize the heating wire 310, generating heat to raise the temperature of the base 100, thereby improving the heating rate and accuracy. The power supply 800 provides power to the heating wire 310 and the temperature monitoring unit 410, among other electrical equipment. Its output voltage and current should meet the heating requirements of the heating wire 310 and the operational needs of the temperature controller, and it should have overcurrent and overvoltage protection functions to ensure the safe operation of the equipment.

[0073] In some embodiments, the test base 100 further includes a cooling module 500, which is thermally coupled to the base 100 and communicatively connected to a temperature control module 400. The temperature control module 400 controls the operation of the cooling module 500. A temperature monitoring unit 410 collects temperature signals from the base 100 and the phase change medium in real time and feeds them back to the control unit 420. Based on the deviation between the set temperature value and the actual measured value, the control unit 420 controls the operation of the heating or cooling system of the heating wire 310, achieving precise closed-loop control of the temperature of the base 100.

[0074] Specifically, in some embodiments, the cooling module 500 includes a cooling water tank 510, a water pump 520, and heat dissipation pipes 530. The cooling water tank 510 stores coolant, and its capacity is designed based on the maximum heat dissipation requirements of the base 100 and the heat storage capacity of the phase change medium to ensure that the coolant can fully absorb the heat released by the base 100 and the phase change material. The water pump 520 drives the coolant to circulate between the heat dissipation pipes 530 and the cooling water tank 510. Its flow rate and head should meet the requirements of the cooling system to ensure that the coolant can quickly remove heat and maintain the normal operation of the cooling system. The heat dissipation pipes 530 connect the cooling water tank 510 and the base 100, providing good heat dissipation. The shape of the heat dissipation pipes 530 should facilitate heat exchange between the coolant and the air, improving cooling efficiency.

[0075] With the above settings, the cooling module 500 is not activated when the temperature deviation is small. When the temperature of the base 100 is too high, exceeding the temperature control capability of the phase change medium, the water pump 520 is activated, pumping the coolant from the cooling water tank 510 into the space at the bottom of the base 100 and allowing it to flow inside, absorbing the heat released by the base 100 and the phase change medium, and then returning to the cooling water tank 510, thus achieving rapid cooling of the base 100. When the heat generated by the test piece is too large or the ambient temperature is too high, the phase change medium alone cannot suppress the temperature rise of the base 100. The cooling module 500 serves as a supplementary high-temperature emergency regulation, ensuring that the temperature control range covers more extreme operating conditions. Through real-time feedback from the temperature monitoring unit 410 and dynamic adjustment from the control unit 420, the heating module 300 and the cooling module 500 work in conjunction with the phase change module 200 to ultimately stabilize the temperature of the base 100 within a high-precision range of the target value, meeting the stringent temperature requirements of devices such as solar cells.

[0076] In some embodiments, the test base 100 further includes a plurality of vacuum adsorption holes 700 and a vacuum channel 710. The vacuum adsorption holes 700 are disposed on the bearing surface 110 and are used to adsorb the test piece. The vacuum channel 710 is connected to the vacuum adsorption holes 700 and is used to provide negative pressure to the vacuum adsorption holes 700.

[0077] Specifically, the vacuum adsorption holes 700 are directly formed on the bearing surface 110 of the base 100, i.e., the surface on which the test piece is placed. They typically consist of multiple small holes evenly distributed across the bearing surface 110, ensuring adsorption force on the solar cell from multiple points. The vacuum channel 710 is a channel structure located inside the base 100, with one end connected to all the vacuum adsorption holes 700 and the other end connectable to an external vacuum pump or negative pressure generator, forming a negative pressure conduction path from the vacuum channel 710 to the adsorption holes. When the external vacuum pump operates, it extracts air from inside the base 100 through the vacuum channel 710, creating negative pressure within the vacuum adsorption holes 700. When the solar cell to be tested is placed on the bearing surface 110, its surface contacts the adsorption holes, and the external atmospheric pressure presses the cell firmly against the bearing surface 110, achieving stable fixation.

[0078] Solar cells are typically thin sheets. If they are fixed using traditional mechanical clamps, the edges of the cells may be subjected to uneven force, resulting in deformation or even breakage, which affects the accuracy of the test. Vacuum adsorption, on the other hand, forms surface contact adsorption through uniformly distributed adsorption holes, which can ensure that the cells are tightly attached to the bearing surface 110 without damaging them.

[0079] With the above settings, during solar cell testing, if the cell shifts due to equipment vibration or slight external contact, it can cause poor contact between the test probe and the cell electrodes, or changes in the cell's light-receiving area, leading to deviations in test data. Vacuum adsorption, through continuous negative pressure adsorption, can completely avoid such displacement, ensuring stable test positioning. The tight fit reduces the air gap between the solar cell and the supporting surface 110, allowing the heat generated during cell operation to be more smoothly transferred to the base 100, where it is absorbed by the phase change module 200 or dissipated through the cooling module 500. This indirectly ensures the stability of the temperature control of the base 100 and avoids affecting the accuracy of test parameters due to localized heat accumulation.

[0080] At least one embodiment of this application provides a solar energy testing device, which includes the test base 100 of any of the above embodiments.

[0081] According to the embodiment of this application, the solar energy testing device directly utilizes the above-mentioned functions of the test base 100, eliminating the need for repeated design of temperature control and fixing structures. This simplifies the overall architecture of the device, provides a stable temperature environment and reliable mechanical fixation for solar energy testing, and is adaptable to the testing of solar cells of different types and testing standards, thereby improving the versatility of solar energy testing and ultimately achieving reliable and efficient evaluation of solar cell performance.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A test base, characterized in that, include: A base, wherein the base is provided with a bearing surface, the bearing surface being used to bear the test piece; A phase change module is thermally coupled to the base; the phase change module includes a phase change medium configured to regulate the temperature of the base by absorbing or releasing heat through phase change. A heating module, which is thermally coupled to the base, is used to heat the base.

2. The test base according to claim 1, characterized in that, The phase change module includes: A phase change filling cavity is formed within the base and is used to fill the phase change medium.

3. The test base according to claim 2, characterized in that, The phase change medium includes paraffin.

4. The test platform according to claim 2, characterized in that, The phase change module further includes: A replacement port is provided on the outer wall of the base and connected to the phase change filling cavity for replacing the phase change medium.

5. The test base according to claim 4, characterized in that, The heating module includes: A heating wire is disposed within the base and close to the phase change filling cavity.

6. The test base according to claim 5, characterized in that, The heating module also includes: An insulating layer that covers the heating wire; Several insulating fasteners are provided to fix the heating wire to the base.

7. The test base according to claim 2, characterized in that, The test platform also includes: The temperature control module includes a temperature monitoring unit and a control unit. The temperature monitoring unit is used to monitor the temperature of the bearing surface and the temperature of the phase change filling cavity. The temperature monitoring unit is communicatively connected to the control unit. The control unit is communicatively connected to the phase change module and / or the heating module, and is used to control the operation of the phase change module and / or the heating module according to the temperature of the bearing surface and the temperature of the phase change filling cavity.

8. The test base according to claim 7, characterized in that, The test platform also includes: A cooling module is thermally coupled to the base and communicatively connected to the temperature control module, which is used to control the operation of the cooling module.

9. The test base according to claim 1, characterized in that, The test platform also includes: A plurality of vacuum adsorption holes are disposed on the bearing surface for adsorbing the test piece; A vacuum channel, which is connected to the vacuum adsorption hole, is used to provide negative pressure to the vacuum adsorption hole.

10. A solar energy testing device, characterized in that, Includes the test base as described in any one of claims 1-9.

Images