HJT battery piece ultraviolet detection device and use method

Abstract

The invention belongs to the technical field of solar battery detection, and particularly relates to an HJT battery piece ultraviolet detection device and a use method. The device comprises a device wall, a light-transmitting part, a packaging material fixing part, a packaging material part, a battery piece supporting part and an extraction opening. The light-transmitting part is arranged at the top of the device wall, the packaging material fixing part surrounds the device wall on the inner side of the device wall, the packaging material part is fixed on the packaging material fixing part, the battery piece supporting part is fixed on one side, far away from the light-transmitting part, of the packaging material fixing part on the device wall, and the HJT battery piece is fixed on the battery piece supporting part. The extraction opening is formed in the side face of the device wall, and the packaging material part is attached to the HJT battery piece in the air extraction process. According to the invention, through the fitting design of the light-transmitting part, the packaging material part and the air exhaust, the actual environment that ultraviolet light penetrates through the multilayer material and then acts on the HJT battery piece is simulated, and the packaging material part is tightly fitted with the surface of the battery piece through air exhaust, so that the anti-ultraviolet performance of the photovoltaic module is truly restored, and a guarantee is provided for more accurate performance evaluation.

Description

Technical Field

[0001] The present invention belongs to the technical field of solar cell detection, and in particular relates to a HJT cell sheet ultraviolet detection device and a use method thereof. Background Art

[0002] Photovoltaic modules are the core components of solar power generation systems. They are composed of several solar cells connected in series and in parallel. Among them, HJT (Heterojunction with Intrinsic Thin Layer) cells have become one of the main technical routes for the new generation of photovoltaic modules due to their high photoelectric conversion efficiency, low temperature coefficient, excellent weak light performance and double-sided power generation capabilities. The photoelectric performance of HJT cells directly determines the overall efficiency and long-term reliability of photovoltaic modules.

[0003] In order to ensure the long-term stable operation of photovoltaic modules in the actual environment, the product inspection process usually needs to evaluate the anti-ultraviolet performance of photovoltaic modules. This is because ultraviolet rays are one of the most significant environmental factors that affect the performance of photovoltaic modules. Long-term exposure to ultraviolet rays will cause aging of cells, packaging materials and interface structures, thereby affecting the power generation efficiency and life of photovoltaic modules.

[0004] At present, the UV resistance of photovoltaic modules is usually tested directly on the complete modules. However, this test method has the disadvantages of high testing cost and long testing cycle. This is because the structure of photovoltaic modules is complex and usually consists of multiple layers of materials, including transparent glass, packaging materials, cells and backplanes. Directly testing the UV performance of photovoltaic modules requires a lot of resources and has high testing costs. In addition, the UV performance test of photovoltaic modules needs to simulate a long-term UV irradiation environment, and the test cycle is usually long, which is difficult to meet the needs of rapid inspection.

[0005] In order to reduce costs and shorten the inspection cycle, the current industry practice usually uses the HJT cell anti-ultraviolet performance test to replace the photovoltaic module ultraviolet performance test. By evaluating the changes in the photoelectric performance of a single HJT cell under ultraviolet irradiation, the anti-ultraviolet ability of the photovoltaic module is indirectly reflected. However, this method cannot accurately reflect the actual anti-ultraviolet ability of the photovoltaic module. This is mainly reflected in the fact that the existing inspection method does not restore the real interface effect: in the photovoltaic module, the packaging material and the HJT cell are tightly fitted, and the interface state has a significant impact on the transmission of ultraviolet rays and the performance of the cell; while in the existing test method, there is usually a gap between the packaging material and the HJT cell, resulting in differences between the test results and the actual components. In short, it is difficult to accurately evaluate the anti-ultraviolet ability of photovoltaic modules by testing the anti-ultraviolet performance of HJT cells alone. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a HJT cell ultraviolet detection device on one hand, including a vessel wall, a light-transmitting portion, a packaging material fixing portion, a packaging material portion, a cell support portion, and an exhaust port. The light-transmitting portion is an ultraviolet light-transmitting material, and the packaging material portion is a flexible material. The light-transmitting portion is arranged on the top of the vessel wall, the packaging material fixing portion surrounds the vessel wall on the inner side of the vessel wall, the packaging material portion is fixed on the packaging material fixing portion, and the cell support portion is fixed on the vessel wall. The packaging material fixing portion is away from the light-transmitting portion, and the HJT cell is fixed on the cell support portion. The light-transmitting portion, the packaging material portion, and the HJT cell are arranged relatively to each other. The exhaust port is arranged on the side of the vessel wall, and when exhausting, the packaging material portion is attached to the HJT cell.

[0007] The present invention first sets up a light-transmitting portion and a packaging material portion. The ultraviolet rays must pass through the light-transmitting portion and the packaging material portion in sequence, and then irradiate the surface of the HJT cell, thereby truly simulating the actual action path of ultraviolet rays in photovoltaic devices. More importantly, the packaging material portion is fixed to the inside of the device wall by the packaging material fixing portion, and is attached to the surface of the HJT cell under the action of the exhaust port, eliminating the gap between the packaging material and the cell, and restoring the close fitting state of the packaging material and the cell in the component. The present invention dynamically reflects the actual impact of ultraviolet rays on photovoltaic modules from multiple dimensions of optics, thermal effects and electrical properties, thereby achieving a comprehensive and true restoration of the anti-ultraviolet performance of photovoltaic modules.

[0008] Furthermore, the cell support portion includes a first pressing portion, a second pressing portion, a first support portion, and a second support portion. A first pressing contact is provided on the first pressing portion, a second pressing contact is provided on the second pressing portion, a first support contact is provided on the first support portion, and a second support contact is provided on the second support portion. The first pressing contact, the first support contact, the second pressing contact, the second support contact, and the second support contact are conductive materials. The first pressing contact and the first support contact are arranged opposite to each other, and the second pressing contact and the second support contact are arranged opposite to each other. One end of the HJT cell is placed between the first pressing contact and the first support contact, and the other end of the HJT cell is placed between the second pressing contact and the second support contact. These contacts are all conductive materials, forming a complete electrical circuit, and realizing real-time monitoring of the electrical performance parameters of the cell (such as short-circuit current, open-circuit voltage, and fill factor). At the same time, the design also has good adaptability, and can adapt to HJT cells of different sizes by adjusting the spacing between the first pressing portion / first support portion and the second pressing portion / second support portion.

[0009] Furthermore, the first pressing contact, the first supporting contact, the first pressing contact, and the second supporting contact are made of flexible materials. The flexible material can form a uniform contact pressure on the surface of the HJT cell, reduce scratches or mechanical damage on the surface of the HJT cell caused by excessive local pressure of silver, and provide better protection for the more fragile areas at the edge of the HJT cell during the test. In addition, the flexible contact can reduce the non-uniformity of the contact resistance without affecting the conductive performance, and improve the accuracy and repeatability of the measurement of electrical performance parameters.

[0010] Furthermore, the first pressing part and the second pressing part extend into the lower side of the packaging material part, and the first pressing part and the second pressing part are elastic materials. In this way, when vacuuming, the packaging material part will compress the first pressing part and the second pressing part, so that a closer contact is formed between the HJT battery cell and the contact, thereby ensuring the stability and accuracy of the electrical performance measurement. In addition, the first pressing part and the second pressing part of the elastic material are flexible and can evenly distribute pressure when subjected to force, thereby avoiding local stress concentration from causing damage to the HJT battery cell. At the same time, this design provides a buffering effect during the attachment process of the packaging material part, reduces the instantaneous stress changes caused by mechanical vibration or vacuuming, and protects the structural integrity of the HJT battery cell.

[0011] Furthermore, the first support part and the second support part are made of rigid materials, which can provide stable and strong mechanical support, so that the HJT cell can be fixed during the test, avoiding the displacement or deformation of the HJT cell due to external force or air extraction. In addition, the combination design of the rigid support part and the flexible contact can provide a double protection for the HJT cell by concentrating the local pressure of the flexible contact environment while providing a stable support.

[0012] Furthermore, the light-transmitting portion is made of quartz glass or magnesium fluoride.

[0013] Furthermore, the packaging material fixing part is made of rigid material, so that the packaging material part is firmly fixed inside the device, avoiding the displacement or deformation of the packaging material part due to pressure changes or external forces generated during the vacuuming process, and maintaining the consistency and stability of the test conditions. At the same time, the rigid packaging material fixing part provides a stable boundary support for the packaging material part, so that the packaging material part and the HJT battery cell are evenly stressed during the vacuuming and attaching process, further improving the tightness of the packaging material part and the HJT battery cell and the accuracy of the test results.

[0014] Furthermore, the material of the packaging material part is EVA or POE.

[0015] Furthermore, the packaging material is thin in the middle and thick at the edges. By taking advantage of the variability of the thinner area in the middle, the packaging material can be quickly attached to the surface of the HJT cell during the vacuuming process. At the same time, the thicker part at the edge provides the necessary support and stability to prevent the packaging material from deforming or tearing due to uneven force during the bonding process. In other words, this method of gradually bonding from the middle to the outside can not only effectively avoid residual bubbles and improve the uniformity of bonding, but also more realistically restore the working state of the packaging material and the cell in the photovoltaic module, thereby providing reliable guarantee for more accurate UV performance testing.

[0016] On the other hand, the present invention provides a method for using a HJT cell ultraviolet detection device, comprising the following steps: Step 1: Fix the HJT cell on the cell support; Step 2: Connect a vacuum pump through the vacuum port to evacuate the inside of the device until the packaging material is attached to the surface of the HJT cell; Step 3: Introduce ultraviolet light from the light-transmitting portion, and the ultraviolet light passes through the light-transmitting portion and the packaging material portion and then irradiates the HJT cell; Step 4: Measure the electrical performance parameters of the HJT cell under ultraviolet light.

[0017] Beneficial effects of the present invention: (1) The present invention simulates the actual environment in which ultraviolet light penetrates multiple layers of materials and acts on the HJT cell by means of the light-transmitting portion, the packaging material portion and the vacuum bonding design. The packaging material portion is tightly bonded to the cell surface by vacuum bonding, eliminating the air gap at the interface, and truly restoring the anti-ultraviolet performance of the photovoltaic module, thus providing a guarantee for more accurate performance evaluation.

[0018] (2) The present invention uses conductive contacts to achieve real-time monitoring of electrical performance parameters. During the test, the HJT cell is stably fixed and the packaging material is evenly attached, ensuring high accuracy and high repeatability of the measurement data, providing a reliable basis for the dynamic evaluation of UV performance.

[0019] (3) Compared with directly testing photovoltaic modules, the present invention only needs to test HJT cells to indirectly reflect the anti-ultraviolet performance of the modules, which greatly reduces the testing cost; the device has a reasonable structural design and is easy to operate. The test can be quickly completed by vacuuming and ultraviolet irradiation, which is suitable for batch testing.

[0020] In summary of the above beneficial effects, the present invention has good application prospects in the field of solar cell detection technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a UV detection device for HJT cells.

[0022] In the figure: 1. vessel wall; 2. light-transmitting portion; 3. packaging material fixing portion; 4. packaging material portion; 51. first pressing portion; 511. first pressing contact; 52. second pressing portion; 521. second pressing contact; 53. first supporting portion; 531. first supporting contact; 54. second supporting portion; 541. second supporting contact; 6. NJT battery cell; 7. exhaust port. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and examples.

[0024] Example 1 The present invention provides a HJT cell ultraviolet detection device, which is mainly used to simulate the ultraviolet action environment of photovoltaic modules and test the anti-ultraviolet performance of HJT cells 6. Figure 1 As shown, the device includes a wall 1, a light-transmitting portion 2, a packaging material fixing portion 3, a packaging material portion 4, a battery cell supporting portion and an air extraction port 7. The detailed structure of the device and the design of each component are as follows: (1) Wall 1: Wall 1 is made of stainless steel with a thickness of 5 mm. It is used to provide structural support for the entire device and ensure the internal airtightness. The inner surface of wall 1 is polished to reduce light scattering. The overall dimensions are 300 mm long, 200 mm wide, and 150 mm high.

[0025] (2) Translucent part 2: Translucent part 2 is arranged at the top of the vessel wall 1, and is made of quartz glass or magnesium fluoride material, with a thickness of 2 mm and a UV transmittance of not less than 95% (wavelength range 200-400 nm). The size of translucent part 2 is 200 mm × 150 mm, which is consistent with the size of the top opening of the vessel wall 1. It is fixed by bolts and is surrounded by a silicone sealing ring to ensure airtightness.

[0026] (3) Packaging material fixing part 3: The packaging material fixing part 3 is located on the inner side of the vessel wall 1, surrounds the vessel wall 1, is made of aluminum alloy, is a rigid material, has a thickness of 3 mm and a width of 10 mm. This part is connected to the vessel wall 1 by bolts, and has anti-slip texture on the inner surface to ensure that the packaging material part 3 is fixed stably and avoids sliding during the vacuum process.

[0027] (4) Packaging material part 4: Packaging material part 4 is made of flexible material (such as EVA or POE) and is used to simulate the packaging layer in photovoltaic modules. The thickness of packaging material part 4 is 0.3 mm in the middle and 1 mm at the edge. It is designed to be thin in the middle and thick at the edge so that it can be attached to the surface of the battery cell from the middle when evacuating air, gradually expel bubbles and form a tight fit. The size of packaging material part 4 is 250 mm in length and 150 mm in width, matching the battery cell support part and fixed by packaging material fixing part 3.

[0028] (5) Cell support: The cell support includes a first pressing portion 51, a second pressing portion 52, a first support portion 53 and a second support portion 54. The first pressing portion 51 and the second pressing portion 52 are located at the two ends of the HJT cell 6, respectively. They are made of elastic rubber with an elastic modulus of 10 MPa, a thickness of 5 mm and a length of 150 mm. They extend into the lower side of the packaging material portion 4 and provide uniform pressure during air extraction, so that the HJT cell 6 is in close contact with the first pressing contact 511 and the second pressing contact 521. The first pressing contact 511 on the first pressing portion 51 and the second pressing contact 521 on the second pressing portion 52 are made of flexible conductive material (such as gold-plated copper foil) with a thickness of 0.2 mm. They provide gentle contact and do not damage the surface of the HJT cell 6. The first support part 53 and the second support part 54 are respectively located at the two ends of the HJT cell 6, and are made of a rigid material (such as stainless steel), with a thickness of 5 mm, to provide a stable support, and the surface is nickel-plated to improve corrosion resistance and durability. In this way, one end of the HJT cell 6 is clamped between the first clamping contact 511 and the first supporting contact 521, and the other end is clamped between the second clamping contact 531 and the second supporting contact 541, forming a stable and reliable fixation.

[0029] (6) Vacuum port 7: The vacuum port 7 is provided on the side of the device wall 1, has a diameter of 10 mm, and is connected to an external vacuum pump. The vacuum pump can reduce the air pressure inside the device to below 50 Pa. When evacuating, the packaging material part 4 starts to adhere to the surface of the HJT cell 6 from the middle, and gradually expands to the edge to discharge bubbles, ensuring that the packaging material part 4 and the HJT cell 6 are closely attached.

[0030] Preferably, a temperature control device is added to the space above the packaging material part 4 to compensate for the heat loss caused by the lack of light-transmitting layer 2 attached to the upper side of the packaging material part 4, so as to more realistically simulate the actual working environment of the photovoltaic module. Specifically, the temperature control device is composed of an infrared heating module or a hot air circulation system, which can adjust the air temperature above the packaging material to 30-80°C according to the experimental requirements, and realize precise temperature control through real-time monitoring and feedback by temperature sensors. The heating module is fixed 20-30 mm above the packaging material part 4 and is insulated from the device to avoid direct contact that affects the experiment. At the same time, the system presets a uniform heating area to ensure uniform heat distribution above the packaging material part 4.

[0031] Preferably, an auxiliary support device is provided on the lower side of the HJT cell 6 to prevent the HJT cell 6 from being bent or broken due to excessive pressure exerted on it by the air pressure of the packaging material part 6 during the exhaust process. Specifically, a flexible support pad or a mesh support structure is added under the cell support part. The flexible support pad is made of silicone or other elastic materials with a thickness of 2-5 mm, which can effectively disperse the pressure and protect the HJT cell 6; the mesh support structure is made of metal or high-strength plastic, with a mesh diameter of 1-3 mm, which can provide strong support without affecting the heat dissipation performance. The support device and the cell support part form an integrated structure, and the height can be adjusted to adapt to cells of different thicknesses. Through the auxiliary support device, the problem of HJT cell 6 being compressed, deformed or damaged during the exhaust process is effectively solved, while ensuring that the surface of the cell remains flat, and the packaging material part can be evenly attached to avoid the impact of poor attachment on the test results. In addition, the design also improves the stability of the measurement of electrical performance parameters and ensures the accuracy and repeatability of the test data.

[0032] Example 2 The present invention provides a method for using a HJT cell ultraviolet detection device, comprising the following steps: Step 1, fix the HJT cell 6 on the cell support. Specifically, select an HJT cell 6 with a standard size of 200 mm × 100 mm, and place its two ends between the first clamping contact 511 and the first support contact 531 of the cell support, and between the second clamping contact 521 and the second support contact 541. Adjust the first clamping part 511 and the second clamping part 521 to ensure that the HJT cell 6 is firmly clamped, and the contacts are in close contact with the cell surface to form a reliable electrical contact circuit to avoid loosening or sliding.

[0033] Preferably, in order to ensure the consistency of the position of the HJT battery cell 6 each time it is placed, a mechanical limit device is set on the battery cell support part, and the calibration and fixation are carried out in combination with the elastic buckle structure. Specifically, adjustable positioning blocks are installed on the left and right sides of the battery cell support part to limit the lateral movement of the battery cell, and the block position can be adjusted by screws to adapt to battery cells of different sizes; a shallow groove is processed on the surface of the battery cell support part, and the width of the groove matches the width of the battery cell, which is used to limit the longitudinal sliding of the HJT battery cell 6; elastic buckles are also installed on both sides of the HJT battery cell 6, and the inner surface of the buckle has anti-slip patterns, which can stably fix the battery cell and prevent displacement caused by vibration or pressure changes during the vacuum process. When placing the HJT battery cell 6, the operator easily inserts the HJT battery cell 6 into the positioning groove, and the buckle automatically pops up and fixes the HJT battery cell 6. Through this combination of mechanical limit and elastic buckle design, the HJT battery cell 6 can be quickly and accurately placed in place, avoiding data errors caused by position offset during each test.

[0034] Step 2, connect the vacuum pump through the exhaust port 7, and evacuate the inside of the device until the packaging material part 4 is attached to the surface of the HJT battery cell 6. Specifically, start the vacuum pump, connect the internal air cavity of the device through the exhaust port 7, and gradually reduce the internal air pressure to below 50Pa. During the exhaust process, the flexible packaging material part 4 gradually adheres to the surface of the HJT battery cell 6 from the middle, and expands to the surrounding until it is completely attached, while expelling all possible bubbles. Observe the fitting state of the packaging material part 4 to ensure that the entire surface of the HJT battery cell 6 is evenly fitted to the packaging material part 4 without air gaps or wrinkles, thereby restoring the actual fitting state of the packaging material in the photovoltaic module.

[0035] Step 3: Introduce ultraviolet light from the light-transmitting part 2, and the ultraviolet light passes through the light-transmitting part 2 and the packaging material part 4 before irradiating the HJT cell 6. Specifically, an ultraviolet light source is introduced into the light-transmitting part 2 at the top of the device, and the ultraviolet light source is set to a wavelength range of 200-400nm and a light intensity of 1000 W / m² to simulate the actual irradiation conditions of ultraviolet light in sunlight. After the ultraviolet light passes through the light-transmitting part 2 and the packaging material part 4, it is evenly irradiated onto the surface of the HJT cell 6. The irradiation time is 5 hours, simulating the effect of long-term ultraviolet irradiation environment on the HJT cell 6, and recording the state changes of the HJT cell 6 at different time points.

[0036] Step 4, measure the electrical performance parameters of the HJT cell 6 under ultraviolet light irradiation. Specifically, during the ultraviolet light irradiation process, connect an external test instrument (such as a photovoltaic IV tester) through a conductive contact to measure the electrical performance parameters of the HJT cell in real time, including short-circuit current, open-circuit voltage, and fill factor. Regularly record the electrical performance data, observe and analyze the performance change trend of the HJT cell 6 under ultraviolet light irradiation. After the data collection is completed, compare the initial electrical performance of the HJT cell 6 and the electrical performance after ultraviolet irradiation to evaluate the impact of ultraviolet rays on its photoelectric performance.

[0037] Preferably, a microporous structure is added in the middle of the packaging material part 4 so that the air can be discharged faster through the surface of the packaging material part 4 during the evacuation process. The microporous structure can prevent air from being trapped between the packaging material part 4 and the HJT cell, eliminate bubbles, and thus achieve a more uniform and tighter attachment. This design utilizes the air permeability of the micropores to ensure that the mechanical strength of the packaging material part 4 is not affected, while not hindering the transmission of ultraviolet light.

[0038] Preferably, a small air guide channel is provided on the back of the packaging material part 4, and the channel is radiated from the middle to the surroundings. When the air is evacuated, the air is quickly discharged along the channel. This ensures that the packaging material part 4 starts to adhere from the middle and gradually expands to the edge area, eliminating the possibility of uneven adhesion and residual bubbles.

[0039] Preferably, during the exhaust process, low-frequency vibration is introduced into the packaging material part 4, for example, a micro-vibration module is provided at the bottom of the device. The vibration reduces the friction of the packaging material part 4, making it easier to adhere to the surface of the HJT cell 6, while exhausting the residual gas on the interface.

[0040] In summary, the present invention provides a UV detection device for HJT cell 6 and a method for using the same, which is intended to simulate the actual action environment of ultraviolet rays in photovoltaic modules, and to efficiently and accurately evaluate the anti-ultraviolet performance of HJT cell 6. The device includes a wall 1, a light-transmitting portion 2, a packaging material fixing portion 3, a packaging material portion 4, a cell support portion and an exhaust port 7. The light-transmitting portion 2 is an ultraviolet light-transmitting material, and the packaging material portion 4 is a flexible material. The packaging material portion 4 is tightly attached to the surface of the HJT cell 6 by exhausting air, and the interface state between the packaging material and the cell in the photovoltaic module is truly restored to ensure that the test conditions are consistent with the actual use environment. The device dynamically reflects the impact of ultraviolet rays on its performance by measuring the electrical performance parameters (such as short-circuit current, open-circuit voltage and fill factor) of the HJT cell 6 under ultraviolet light in real time. Compared with the method of directly testing photovoltaic modules, the present invention only needs to test the HJT cell 6 to indirectly evaluate the anti-ultraviolet performance of the photovoltaic module, which significantly reduces the test cost and cycle, and has the advantages of simple operation, high efficiency and reliability. The research of the present invention can not only deeply reveal the mechanism of ultraviolet rays on HJT cells and packaging materials, provide a scientific basis for optimizing cell materials, packaging processes and component design, but also promote the long-term reliability evaluation and anti-ultraviolet technology improvement of photovoltaic modules in actual environments. In addition, the present invention flexibly adapts to cells and packaging materials of various sizes and materials to meet different experimental needs, and has strong scalability and practical value. Through the application of this device, photovoltaic companies can achieve quality control and performance optimization of HJT cells and photovoltaic modules at a lower cost and higher efficiency, while promoting technological progress in the photovoltaic industry and the development of green energy.

[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A HJT cell UV detection device, characterized in that: It includes a vessel wall, a light-transmitting portion, a packaging material fixing portion, a packaging material portion, a battery cell supporting portion, and an exhaust port, wherein the light-transmitting portion is an ultraviolet light-transmitting material, the packaging material portion is a flexible material, the light-transmitting portion is arranged on the top of the vessel wall, the packaging material fixing portion surrounds the vessel wall on the inner side of the vessel wall, the packaging material portion is fixed on the packaging material fixing portion, the battery cell supporting portion is fixed on the vessel wall, the packaging material fixing portion is away from the side of the light-transmitting portion, the HJT battery cell is fixed on the battery cell supporting portion, the light-transmitting portion, the packaging material portion, and the HJT battery cell are arranged relatively, the exhaust port is arranged on the side of the vessel wall, and when exhausting air, the packaging material portion is attached to the HJT battery cell.

2. The HJT cell UV detection device according to claim 1, characterized in that: The battery cell supporting portion includes a first pressing portion, a second pressing portion, a first supporting portion, and a second supporting portion. The first pressing portion is provided with a first pressing contact, the second pressing portion is provided with a second pressing contact, the first supporting portion is provided with a first supporting contact, and the second supporting portion is provided with a second supporting contact. The first pressing contact, the first supporting contact, the second pressing contact, and the second supporting contact are made of conductive materials. The first pressing contact and the first supporting contact are arranged opposite to each other, and the second pressing contact and the second supporting contact are arranged opposite to each other. One end of the HJT battery cell is placed between the first pressing contact and the first supporting contact, and the other end of the HJT battery cell is placed between the second pressing contact and the second supporting contact.

3. The HJT cell UV detection device according to claim 2, characterized in that: The first pressing contact, the first supporting contact, the first pressing contact, and the second supporting contact are made of flexible materials.

4. The HJT cell ultraviolet detection device according to claim 3, characterized in that: The first pressing portion and the second pressing portion extend into the lower side of the packaging material portion, and the first pressing portion and the second pressing portion are made of elastic material.

5. The HJT cell ultraviolet detection device according to claim 4, characterized in that: The first supporting portion and the second supporting portion are made of rigid material.

6. The HJT cell ultraviolet detection device according to claim 1, characterized in that: The light-transmitting portion is made of quartz glass or magnesium fluoride.

7. The HJT cell ultraviolet detection device according to claim 1, characterized in that: The packaging material fixing portion is made of rigid material.

8. The HJT cell ultraviolet detection device according to claim 1, characterized in that: The packaging material part is made of EVA or POE.

9. The HJT cell ultraviolet detection device according to claim 1, characterized in that: The packaging material portion is thin in the middle and thick at the edge.

10. A method for using a HJT cell UV detection device, characterized in that: The steps include: Step 1: Fix the HJT cell on the cell support; Step 2: Connect a vacuum pump through the vacuum port to evacuate the inside of the device until the packaging material is attached to the surface of the HJT cell; Step 3: Introduce ultraviolet light from the light-transmitting portion, and the ultraviolet light passes through the light-transmitting portion and the packaging material portion and then irradiates the HJT cell; Step 4: Measure the electrical performance parameters of the HJT cell under ultraviolet light.

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