Photovoltaic device based on HJT color battery

Abstract

The invention discloses a photovoltaic device based on an HJT color battery, and the device comprises a photovoltaic module which comprises a battery layer, and two surfaces of the photovoltaic module are provided with glass plates in a laminated manner through adhesive film layers; the frame assembly comprises a frame profile, a packaging groove is integrally formed in the frame profile, the frame assembly is provided with a supporting arm, and an extrusion channel is defined by the packaging groove and the photovoltaic assembly; the sealing assembly comprises a sealing frame which is clamped in the extrusion channels, and a pressurizing cavity is defined by the sealing frame, the photovoltaic assembly and the frame assembly; a pressure adjusting hole is formed in the frame profile and connected with a pressure adjusting assembly. According to the photovoltaic device based on the HJT color battery, the photovoltaic assembly is supported through the supporting arms, the lower sealing frame is prevented from being excessively extruded, the pressurizing cavity is defined by the sealing frame, the frame assembly and the photovoltaic assembly, and the air pressure in the pressurizing cavity is adjusted to be larger than the external air pressure through the pressure adjusting assembly, so that the sealing frame is clamped between the packaging groove and the glass plate; good sealing performance is guaranteed, invasion of water vapor is reduced, and long-term stable power generation performance and appearance display performance of the photovoltaic module are achieved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module technology, and in particular to a photovoltaic device based on HJT color cells. Background Technology

[0002] Colored HJT photovoltaic modules combine aesthetic appeal with the high efficiency and low degradation of HJT cells, making them ideal for building-integrated photovoltaics (BIPV), portable home PV, outdoor special equipment, and landscape and commercial displays. They meet the appearance and functional requirements of different scenarios while achieving photovoltaic power generation, energy conservation, and environmental protection.

[0003] To prevent moisture from entering the HJT battery and affecting its display and power generation performance, four frame profiles are typically connected end to end around the HJT photovoltaic cell unit using corner brackets to form a closed-loop groove with the opening facing inward. Sealing strips are then laid on the upper and lower side walls of the closed-loop groove, so that the glass plates on the upper and lower sides of the HJT photovoltaic cell unit are sealed to the upper and lower side walls of the closed-loop groove through the sealing strips on both sides, thus preventing moisture from entering.

[0004] However, when the aforementioned photovoltaic modules are installed horizontally, the weight of the photovoltaic units (including the cell layer, encapsulant layer, and glass plate) causes the lower sealing strip to experience greater compressive force than the upper sealing strip. For the upper sealing strip, insufficient pressure creates a gap between it and the upper glass plate, allowing moisture to easily seep into the battery through capillary action or wind pressure. Conversely, the lower sealing strip, subjected to excessive pressure, is prone to accelerated aging and deformation, losing its plastic deformation capacity, shortening its lifespan, and hardening and cracking. This leads to decreased sealing performance, allowing external moisture to penetrate the battery through the cracks, resulting in a significant decline in the appearance and power generation performance of the HJT battery module.

[0005] Therefore, it is necessary to improve existing photovoltaic modules based on HJT color cells. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects in the prior art and provide a photovoltaic device based on HJT color cells.

[0007] To achieve the above-mentioned technical effects, the technical solution of the present invention is: a photovoltaic device based on HJT color cells, comprising: A photovoltaic module includes a horizontal battery layer, on both sides of which a glass plate is laminated by an encapsulating film layer; A frame assembly includes frame profiles connected end to end and surrounding the photovoltaic module. The frame profile is integrally formed with an encapsulation groove facing the photovoltaic module. The frame profile has a support arm that fits against the back surface of the photovoltaic module to horizontally support the photovoltaic module. The support arm and the encapsulation groove both extend along the length direction of the frame profile. The encapsulation groove and the corresponding edge of the photovoltaic module enclose each other to form two extrusion channels distributed along the thickness direction of the photovoltaic module. The cross-section of each extrusion channel has a sealed inner end near the bottom of the encapsulation groove and a sealed outer end. The length of the sealed inner end is greater than the length of the sealed outer end, and the sealed inner end gradually transitions to the sealed outer end. The sealing assembly includes elastic sealing frames disposed on the upper and lower sides of the photovoltaic module, the sealing frames being sandwiched within each extrusion channel and forming a pressurization chamber with the photovoltaic module and the frame assembly; At least one of the frame profiles has a pressure regulating hole that communicates with the pressurization chamber. The pressure regulating hole is connected to a pressure regulating component, which is used to adjust the pressure inside the pressurization chamber to maintain the air pressure in the pressurization chamber greater than the external air pressure.

[0008] Preferably, in order to achieve a good sealing connection between the sealing frame and the glass plate under high pressure, the outer edge of the glass plate facing away from the battery layer is chamfered.

[0009] Preferably, in order to facilitate assembly and further ensure that the sealing frame is sealed between the glass plate and the frame profile under high pressure, the inner wall of the encapsulation groove includes a transition section connected to the groove opening of the encapsulation groove. The transition section is inclined toward the photovoltaic module, and the slope of the transition section is consistent with the slope of the chamfer.

[0010] Preferably, in order to achieve good support for the photovoltaic module and further enhance the sealing performance, the chamfer is set in the corresponding encapsulation groove, the groove opening width is consistent with the thickness dimension of the photovoltaic module, and the support arm is integrally formed outside the groove opening of the encapsulation groove and the width direction is parallel to the groove opening direction of the encapsulation groove.

[0011] Preferably, for ease of assembly, each frame profile is provided with a pressure regulating hole, and the circumferential inner wall of the pressure regulating hole is sealed with a connecting pipe, and the connecting pipe is threaded with a sealing plug.

[0012] Preferably, in order to facilitate the positioning of the photovoltaic module and ensure air circulation between the sealing grooves, so that the force on the outside of the sealing frame is uniform and consistent, thereby enhancing the sealing performance, the connecting pipe extends into the pressurization chamber and is gap-fitted with the photovoltaic module, and a vent is provided at the end of the connecting pipe adjacent to the photovoltaic module.

[0013] Preferably, to facilitate the connection between photovoltaic modules, the side of the frame profile away from the photovoltaic module is the connection surface, the width direction of the connection surface is perpendicular to the length direction of the frame profile, the voltage regulating hole is located in the middle of the connection surface, and the end of the connecting pipe away from the photovoltaic module is located between the connection surface and the photovoltaic module.

[0014] Preferably, in order to ensure the sealing of the connector, an elastic sealing ring is provided on the end of the connector away from the photovoltaic module.

[0015] Preferably, in order to ensure the air pressure and dryness in the boosting chamber and prevent moisture from entering the battery, the pressure regulating component includes an air pump and a dehumidifier. The input end of the dehumidifier is connected to the outside, and the output end is connected to the input end of the air pump. The output end of the air pump is equipped with a barometer and is connected to the boosting chamber.

[0016] Preferably, to facilitate flexible selection of the air source at the dehumidifier's air inlet based on the air pressure and humidity within the pressurization chamber, the pressure regulating assembly further includes a three-way pipe. The three ports of the three-way pipe are a first air inlet, a second air inlet, and an air outlet. The air outlet is connected to the input end of the dehumidifier. The first air inlet is connected to the outside environment, and the second air inlet is connected to the pressurization chamber. A switching valve is provided on the three-way pipe, which has three configurations: in the first configuration, the three ports of the three-way pipe are mutually isolated; in the second configuration, the first air inlet and the second air inlet are isolated but connected to the air outlet; and in the third configuration, the second air inlet and the first air inlet are isolated but connected to the air outlet. A hygrometer is provided at the air outlet.

[0017] In summary, compared with existing technologies, the photovoltaic device based on HJT color batteries of this invention supports the photovoltaic module with a support arm, avoiding excessive compression of the lower sealing frame and shortening its service life, ensuring uniform force on the two sealing frames, and forming a pressurized chamber by the sealing frame, frame assembly, and photovoltaic module. The pressure in the pressurized chamber is adjusted by the pressure regulating component to be greater than the external pressure, so that the sealing frame is sandwiched between the encapsulation groove and the glass plate, ensuring good sealing performance and reducing the intrusion of water vapor, thereby achieving long-term stable power generation performance and appearance display performance of the photovoltaic module. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 An explosion diagram; Figure 3 yes Figure 1 Structural diagram omitting the voltage regulating component; Figure 4 yes Figure 3 Cross-sectional structural diagram; Figure 5 yes Figure 4 The front view; Figure 6 yes Figure 5 Enlarged view of part A; Figure 7 yes Figure 3 An explosion diagram; Figure 8 yes Figure 3 The structural diagram of the photovoltaic module is omitted. Figure 9 yes Figure 8 An explosion diagram; Figure 10 yes Figure 9 Enlarged view of part B; In the diagram: 1. Photovoltaic module; 11. Battery layer; 12. Encapsulant layer; 13. Glass plate; 131. Chamfer; 2. Frame profile; 21. Encapsulation groove; 211. Transition section; 22. Support arm; 23. Pressure regulating hole; 24. Connecting pipe; 241. Vent notch; 242. Sealing ring; 243. Outward flange; 25. Sealing plug; 26. Butt joint; 27. Cavity; 3. Sealing frame; 4. Pressure regulating component; 41. Air pump; 42. Dehumidifier; 43. Barometer; 44. T-connector; 441. First air inlet; 442. Second air inlet; 443. Air outlet; 444. Filter; 45. Switching valve; 46. Hygrometer; 47. Rotary joint; 5. Angle bracket; 51. Bolt; 52. Sealing cap. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0020] like Figures 1-10 As shown, a photovoltaic device based on HJT color cells includes: Photovoltaic module 1 includes a horizontal cell layer 11, and glass plates 13 are stacked on both sides of the cell layer 11 through an encapsulant layer 12. The frame assembly includes a frame profile 2 connected end to end and surrounding the photovoltaic module 1. The frame profile 2 is integrally formed with an encapsulation groove 21 facing the photovoltaic module 1. The frame profile 2 has a support arm 22 that fits against the back surface of the photovoltaic module 1 to horizontally support the photovoltaic module 1. Both the support arm 22 and the encapsulation groove 21 extend along the length direction of the frame profile 2. The encapsulation groove 21 and the corresponding edge of the photovoltaic module 1 enclose to form two extrusion channels distributed along the thickness direction of the photovoltaic module 1. The cross-section of each extrusion channel is a sealed inner end near the bottom of the encapsulation groove 21, and a sealed outer end. The length of the sealed inner end is greater than the length of the sealed outer end, and the sealed inner end gradually transitions to the sealed outer end. The sealing assembly includes a flexible sealing frame 3 disposed on the upper and lower sides of the photovoltaic module 1. The sealing frame 3 is sandwiched in each extrusion channel and surrounds the photovoltaic module 1 and the frame assembly to form a pressurization chamber. At least one of the frame profiles 2 has a pressure regulating hole 23 that communicates with the pressurization chamber. The pressure regulating hole 23 is connected to a pressure regulating component 4. The pressure regulating component 4 is used to adjust the pressure inside the pressurization chamber so as to maintain the air pressure in the pressurization chamber greater than the outside air pressure.

[0021] In the photovoltaic module 1 of the photovoltaic device of the present invention, in order to ensure a good appearance display effect of the photovoltaic module 1, the battery layer 11 preferably adopts HJT color battery cells, and glass plates 13 are stacked and connected on both sides of the battery layer 11 through the adhesive film layer 12. The length and width dimensions of the battery layer 11, the adhesive film layer 12 and the glass plate 13 are equal and correspond to each other.

[0022] In the frame assembly, there are four frame profiles 2, each corresponding to one of the four sidewalls of the photovoltaic module 1, extending along the length of the corresponding sidewall. The frame profile 2 has horizontal support arms 22, which are used to contact the back surface of the photovoltaic module 1, that is, to contact the bottom surface of the glass plate 13 below the battery layer 11 in the photovoltaic module 1. Thus, the support arms 22 of the frame profile 2 horizontally support the photovoltaic module 1, preventing the sealing frame 3 below from being excessively squeezed by the photovoltaic module 1, which could damage the sealing frame 3 and shorten its service life. The sealing frame 3 is a rectangular frame, with its length and width directions aligned with the length and width directions of the photovoltaic module 1, respectively. Preferably, the sealing frame 3 is made of silicone rubber (or reinforced fluoropolymer) with a Shore hardness of 55-55D to ensure good shrinkage performance and tear resistance. The sealing frame 3 includes four sealing strips connected end-to-end, each corresponding to one of the four encapsulation grooves 21, and is sandwiched between the inner sidewall of the encapsulation groove 21 and the edge of the glass plate 13 to prevent moisture from entering the interior of the photovoltaic module 1.

[0023] The sealing component, photovoltaic module 1, and four frame profiles 2 enclose a pressure chamber, which is a closed loop. A pressure regulating hole 23 is opened on one of the frame profiles 2, and the pressure regulating hole 23 is connected to a pressure regulating component 4. The pressure regulating component 4 inflates the pressure chamber with air, making the air pressure inside the pressure chamber greater than the outside air pressure. By adjusting the inflation amount, the pressure difference between the pressure chamber and the outside air pressure can be adjusted. After being subjected to the air pressure inside the pressure chamber, the four sealing strips of the sealing frame 3 tend to move towards the center. The four sealing strips correspond to four compression channels. The inner sealing end of the extrusion channel is larger than the outer sealing end. Therefore, after the sealing frame 3 is extruded, the space in which the four sealing strips can retract inward gradually decreases. After the sealing strips are extruded, they can ensure a good sealing connection between the sealing strips and the glass plate 13 and the inner wall of the encapsulation groove 21. At the same time, since the air pressure in the pressurization chamber is greater than the external air pressure, it further prevents water vapor from entering the pressurization chamber and invading the interior of the photovoltaic module 1. In this way, the photovoltaic module 1 is guaranteed to have good and stable photovoltaic power generation performance and appearance display performance for a long time.

[0024] After some gas leaks into the pressurization chamber, the pressure regulating component 4 can periodically replenish the pressurization chamber with gas to increase its internal pressure, ensuring that the pressure inside the pressurization chamber is greater than the external pressure. The pressure inside the pressurization chamber can be controlled and maintained within a certain range, so that the compression of the sealing frame 3 is maintained between 30% and 40%. This design is mainly based on the fact that the sealing performance between the sealing frame 3 and the glass plate 13 and the encapsulation groove 21 depends on the extrusion pressure and compression of the sealing frame 3. When the extrusion pressure is small, the compression is insufficient, making it difficult for the sealing frame 3 to seal and fill the assembly gap. At this time, external moisture can easily enter the pressurization chamber through the tiny assembly gap, affecting the power generation performance and appearance of the photovoltaic module 1. When the extrusion pressure is too large, the compression is too large, and the sealing frame 3 is over-compressed, exceeding its bearing limit. After being subjected to excessive plastic deformation, the sealing frame 3 will lose its elasticity, which will lead to a decrease in the tightness of the interface. After rebounding, an interface gap will appear, and the sealing frame will be prone to aging and cracking, further leading to a decrease in sealing performance.

[0025] like Figure 6 , Figures 8-10As shown, the frame profile 2 of the present invention is integrally formed with a cavity 27 extending along its own length direction. The cavity 27 is located below the encapsulation groove 21 on the side close to the photovoltaic module 1 and directly below the support arm 22. Two adjacent frame profiles 2 are connected by L-shaped corner brackets 5. The two arms of the corner brackets 5 are sealed and fitted to the circumferential inner walls of the two frame profiles 2. The corner brackets 5 are fixedly connected to the frame profiles 2 by bolts 51. The bolts 51 are screwed into the side of the frame profile 2 close to the photovoltaic module 1. After fixing it to the end of the corner bracket 5, curing adhesive is applied to the head of the bolt 51 so that the curing adhesive is cured and formed into a sealing cap 52, covering the opening position of the frame profile 2, thereby preventing moisture from entering the cavity 27 of the frame profile 2. For the splicing position of the frame profiles 2, the connection can be sealed by applying sealant to avoid gaps between the frame profiles 2 that allow moisture to enter.

[0026] A further improvement is that a chamfer 131 is provided on the circumferential outer edge of the side of the glass plate 13 facing away from the battery layer 11; the inner wall of the encapsulation groove 21 includes a transition section 211 connected to the groove opening of the encapsulation groove 21, the transition section 211 is inclined toward the photovoltaic module 1, and the slope of the transition section 211 is consistent with the slope of the chamfer 131.

[0027] like Figure 6 As shown, with the above design, due to the presence of chamfer 131 and the inclined transition section 211 at the opening of the encapsulation groove 21, the slope of the transition section 211 is consistent with the slope of chamfer 131. Thus, the cross-section of the extrusion channel is an isosceles trapezoid, and the lower base of the isosceles trapezoid is located between the upper base of the isosceles trapezoid and the center of the photovoltaic module 1.

[0028] Furthermore, the cross-section of the sealing frame 3 is an isosceles trapezoidal shape. Among the four sealing strips of the sealing frame 3, the upper and lower surfaces of the sealing strips are sealed and fitted to the chamfered edge 131 of the glass plate 13 and the transition section 211 of one of the inner sidewalls of the encapsulation groove 21. Specifically, for the upper sealing frame 3, its top surface is sealed and fitted to the transition section 211 of the upper inner sidewall of the encapsulation groove 21, and its bottom surface is sealed and fitted to the chamfered edge 131 of the top surface of the upper glass plate 13. For the lower sealing frame 3, its top surface is sealed and fitted to the chamfered edge 131 of the bottom surface of the lower glass plate 13, and its bottom surface is sealed and fitted to the transition section 211 of the lower inner sidewall of the encapsulation groove 21.

[0029] Because the air pressure inside the pressurization chamber is greater than the external air pressure, the gas inside the pressurization chamber acts on the sealing frame 3, causing the four sealing strips of the sealing frame 3 to tend to move closer to the center. This ensures that the upper and lower surfaces of the sealing frame 3 are sealed and fitted to the chamfered edge 131 of the glass plate 13 and the transition section 211 of the encapsulation groove 21, guaranteeing airtightness and preventing moisture intrusion. Furthermore, since the slope of the transition section 211 is the same as the slope of the chamfer 131, the sealing frame 3 has a mirror-symmetrical structure in its thickness direction. This facilitates assembly, ensuring that both the upper and lower surfaces maintain a good sealed fit with the chamfer 131 and the transition section 211 respectively. It also ensures uniform stress on the sealing frame 3, improving airtightness and extending its service life.

[0030] A further improvement is that the chamfer 131 is set in the corresponding encapsulation groove 21, the groove width of the encapsulation groove 21 is consistent with the thickness of the photovoltaic module 1, and the support arm 22 is integrally formed outside the groove of the encapsulation groove 21 and the width direction is parallel to the groove direction of the encapsulation groove 21.

[0031] After the above design is adopted, the chamfer 131 is built into the encapsulation groove 21 after assembly, so that the sealing frame 3 is housed in the encapsulation groove 21 of the four frame profiles 2. This avoids the sealing frame 3 from being easily accelerated by external sun and rain, which would affect the sealing performance. The support arm 22 is integrally formed outside the groove of the encapsulation groove 21, which ensures the compactness of the frame profile 2 structure, reduces the back shading area of ​​the photovoltaic module 1, and ensures that the photovoltaic device based on HJT color cell has a certain amount of light received on the back side, thereby ensuring the power generation.

[0032] A further improvement is that each frame profile 2 is provided with a pressure regulating hole 23, and the circumferential inner wall of the pressure regulating hole 23 is sealed with a connecting pipe 24, and the connecting pipe 24 is threaded with a sealing plug 25.

[0033] Each of the four frame profiles 2 is provided with a pressure regulating hole 23, and a connecting pipe 24 is fixedly connected by welding. The connecting pipe 24 is threadedly connected to a sealing plug 25. With this design, users can choose to connect the pressure regulating component 4 to one of the pressure regulating holes 23 according to the actual installation situation, so as to replenish dry gas into the encapsulation groove 21 through the connecting pipe 24 and maintain a certain high pressure in the pressurization chamber.

[0034] A further improvement is that the connecting pipe 24 extends into the pressurization chamber and is fitted with the photovoltaic module 1 with a clearance, and a venting notch 241 is provided at the end of the connecting pipe 24 adjacent to the photovoltaic module 1.

[0035] By fitting the edge gap between the connecting pipe 24 and the photovoltaic module 1, the photovoltaic module 1 is limited to prevent it from shifting horizontally. This ensures the sealed connection between the photovoltaic module 1, the frame assembly, and the sealing frame 3. The venting notch 241 facilitates the interconnection of the various extrusion channels, preventing the pressurization chamber from being divided into several isolated parts, which would cause uneven stress on the sealing frame 3 and affect the sealing performance.

[0036] A further improvement is that the side of the frame profile 2 away from the photovoltaic module 1 is the mating surface 26. The width direction of the mating surface 26 is perpendicular to the length direction of the frame profile 2. The pressure regulating hole 23 is located in the middle of the mating surface 26. The end of the connecting pipe 24 away from the photovoltaic module 1 is located between the mating surface 26 and the photovoltaic module 1. An elastic sealing ring 242 is provided on the outside of the end of the connecting pipe 24 away from the photovoltaic module 1.

[0037] Specifically, the end of the connector 24 furthest from the photovoltaic module 1 has an integrally formed annular outward flange 243. The outward flange 243 is located between the mating surface 26 and the photovoltaic module 1. A sealing ring 242 protruding from the plane of the mating surface 26 is provided on the outward flange 243. The sealing ring 242 is a rubber ring. A cover plate that is sealed and connected to the sealing ring 242 is provided on the sealing plug 25.

[0038] With the above design, when using a single photovoltaic module 1, the sealing ring 242 ensures the seal between the sealing plug 25 and the connecting pipe 24, preventing moisture from entering the pressurization chamber through the gap between the sealing plug 25 and the connecting pipe 24 and thus invading the interior of the photovoltaic module 1. When two or more photovoltaic modules 1 need to be used, after aligning two adjacent photovoltaic modules 1, remove the sealing plug 25 on their opposite mating surfaces 26, and bring the frame components of the two photovoltaic modules 1 close to each other, so that their connecting pipes 24 are coaxial and the two mating surfaces 26 of the two photovoltaic modules 1 abut against each other. The sealing ring 242 on the mating surfaces 26 ensures the seal between the two photovoltaic modules. The connecting pipe 24 in section 1 is coaxially connected and fixed to the frame components of the two adjacent photovoltaic modules 1. At this time, the pressurization chambers corresponding to the two photovoltaic modules 1 are connected to each other. Only one pressure regulating component 4 is needed to maintain the air pressure in the pressurization chambers corresponding to the two photovoltaic modules 1, so as to prevent water vapor intrusion. This reduces the amount of pressure regulating component 4 required, lowers the cost, and facilitates later maintenance. Especially during expansion, when the fixed area is increased, one of the sealing plugs 25 of the frame component corresponding to the photovoltaic module 1 at the end position can be unscrewed to connect the expanded photovoltaic module 1 and the frame component. After fixing the frame component, it can continue to be used.

[0039] A further improvement is that the pressure regulating component 4 includes an air pump 41 and a dehumidifier 42. The input end of the dehumidifier 42 is connected to the outside, and the output end is connected to the input end of the air pump 41. The output end of the air pump 41 is equipped with a barometer 43 and is connected to the pressurization chamber.

[0040] With the above design, the pressure in the booster chamber can be easily monitored by the barometer 43. After a period of use, because the pressure in the booster chamber is greater than the external pressure, some gas in the booster chamber leaks to the outside, and the pressure in the booster chamber decreases. When it decreases to the preset range, external air can be drawn in by the air pump 41. The external air passes through the dehumidifier 42 to remove moisture and form dry air. Then, it is input into the booster chamber through the output end of the air pump 41 to maintain the pressure in the booster chamber and ensure that the compression deformation of the sealing frame 3 is between 30% and 40%, thus maintaining the good sealing performance of the sealing frame 3.

[0041] A further improvement is that the pressure regulating component 4 also includes a three-way pipe 44, with three ports being a first air inlet 441, a second air inlet 442, and an air outlet 443. The air outlet 443 is connected to the input end of the dehumidifier 42, the first air inlet 441 is connected to the outside, and the second air inlet 442 is connected to the pressurization chamber. A switching valve 45 is provided on the three-way pipe 44, which has three forms. In the first form, the three ports of the three-way pipe 44 are mutually isolated. In the second form, the first air inlet 441 and the second air inlet 442 are isolated and connected to the air outlet 443. In the third form, the second air inlet 442 and the first air inlet 441 are isolated and connected to the air outlet 443. A hygrometer 46 is provided on the air outlet 443.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, the output end of the air pump 41 and the second air inlet 442 are respectively fixedly connected to the connecting pipes 24 on the two opposite frame profiles 2 through two rotary joints 47. The sealing rings 242 of the connecting pipes 24 ensure the sealed connection between the second air inlet 442 and the connecting pipes 24, as well as the sealed connection between the output end of the air pump 41 and the connecting pipes 24. The first air inlet 441 is threadedly connected to a filter element 444, which is densely covered with mesh holes so that the external air is first filtered for dust before entering the three-way pipe 44.

[0043] After adopting the above design, the humidity and air pressure in the pressurization chamber are detected by the hygrometer 46 and the barometer 43, respectively. When both humidity and air pressure are within the preset range, the switching valve 45 is adjusted to the first state, the three ports of the three-way pipe 44 are disconnected, the air pump 41 stops running, and the pressurization chamber maintains a certain high pressure to keep it dry, effectively preventing external moisture from entering the photovoltaic module 1. When the air pressure in the pressurization chamber decreases to below the preset range, while the humidity remains low, the switching valve 45 is adjusted to the second state, the air pump 41 and dehumidifier 42 operate, and the external air is first filtered by the filter element 444 and then initially dried by the dehumidifier 42 to form dry air, which is then input into the pressurization chamber via the air pump 41, increasing the air pressure in the pressurization chamber until it reaches the preset range. At this point, the dehumidifier 42 and the air pump 41 stop running, and the switching valve 45 switches to the first state. When the humidity in the pressurization chamber decreases, the air pressure in the pressurization chamber increases. When the pressure increases beyond the preset range but reaches the target level, the switching valve 45 adjusts to the third state, and the air pump 41 and dehumidifier 42 operate. The gas in the pressurization chamber is dehumidified by the dehumidifier 42 and then returns to the pressurization chamber. During this process, the air pressure in the pressurization chamber remains basically constant, while the humidity gradually decreases until it drops to the preset range. Then, the dehumidifier 42 and air pump 41 stop operating, and the switching valve 45 switches to the first state. When the humidity in the pressurization chamber is too high and the air pressure is too low, the air pump 41 and dehumidifier 42 operate, and the switching valve 45 switches to the third state to facilitate dehumidification of the gas in the pressurization chamber until the humidity drops to the preset range. Then, the switching valve 45 adjusts to the second state. At this time, the air pump 41 introduces external air to increase the air pressure in the pressurization chamber. After the pressure returns to the preset range, the switching valve 45 switches to the first state, and the air pump 41 and dehumidifier 42 stop operating.

[0044] Therefore, by adopting the above structure, by monitoring the air pressure and humidity in the pressurization chamber, it is convenient to maintain the air pressure and humidity in the pressurization chamber within the qualified range, so as to keep the shrinkage of the sealing frame 3 within the reliable range, thereby ensuring a good sealing connection between the sealing frame 3, the glass plate 13 and the frame profile 2. This reduces the amount of water vapor intruding into the photovoltaic module 1 and avoids the accumulation of moisture in the pressurization chamber. In this way, the good power generation performance and appearance display effect of the photovoltaic module 1 are further guaranteed.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A photovoltaic device based on HJT color cells, characterized in that, include: A photovoltaic module includes a horizontal battery layer, on both sides of which a glass plate is laminated by an encapsulating film layer; A frame assembly includes frame profiles connected end to end and surrounding the photovoltaic module. The frame profile is integrally formed with an encapsulation groove facing the photovoltaic module. The frame profile has a support arm that fits against the back surface of the photovoltaic module to horizontally support the photovoltaic module. The support arm and the encapsulation groove both extend along the length direction of the frame profile. The encapsulation groove and the corresponding edge of the photovoltaic module enclose each other to form two extrusion channels distributed along the thickness direction of the photovoltaic module. The cross-section of each extrusion channel has a sealed inner end near the bottom of the encapsulation groove and a sealed outer end. The length of the sealed inner end is greater than the length of the sealed outer end, and the sealed inner end gradually transitions to the sealed outer end. The sealing assembly includes elastic sealing frames disposed on the upper and lower sides of the photovoltaic module, the sealing frames being sandwiched within each extrusion channel and forming a pressurization chamber with the photovoltaic module and the frame assembly; At least one of the frame profiles has a pressure regulating hole that communicates with the pressurization chamber. The pressure regulating hole is connected to a pressure regulating component, which is used to adjust the pressure inside the pressurization chamber to maintain the air pressure in the pressurization chamber greater than the external air pressure.

2. The photovoltaic device based on HJT color cells according to claim 1, characterized in that: The outer edge of the glass plate facing away from the battery layer has a chamfer.

3. The photovoltaic device based on HJT color cells according to claim 2, characterized in that: The inner wall of the encapsulation groove includes a transition section connected to the groove opening of the encapsulation groove. The transition section is inclined toward the photovoltaic module, and the slope of the transition section is consistent with the slope of the chamfer.

4. The photovoltaic device based on HJT color cells according to claim 2, characterized in that: The chamfer is set in the corresponding encapsulation groove, the groove width is consistent with the thickness of the photovoltaic module, and the support arm is integrally formed outside the groove of the encapsulation groove with its width direction parallel to the groove opening of the encapsulation groove.

5. The photovoltaic device based on HJT color cells according to claim 1, characterized in that: Each frame profile is provided with a pressure regulating hole, and the circumferential inner wall of the pressure regulating hole is sealed with a connecting pipe, and the connecting pipe is threaded with a sealing plug.

6. The photovoltaic device based on HJT color cells according to claim 5, characterized in that: The connecting pipe extends into the pressurization chamber and is gap-fitted with the photovoltaic module. A vent is provided at the end of the connecting pipe adjacent to the photovoltaic module.

7. The photovoltaic device based on HJT color cells according to claim 5, characterized in that: The side of the frame profile away from the photovoltaic module is the mating surface. The width direction of the mating surface is perpendicular to the length direction of the frame profile. The pressure regulating hole is located in the middle of the mating surface. The end of the connecting pipe away from the photovoltaic module is located between the mating surface and the photovoltaic module.

8. The photovoltaic device based on HJT color cells according to claim 7, characterized in that: An elastic sealing ring is provided on the end of the connector that is furthest from the photovoltaic module.

9. The photovoltaic device based on HJT color cells according to any one of claims 1-8, characterized in that: The pressure regulating assembly includes an air pump and a dehumidifier. The input end of the dehumidifier is connected to the outside, and the output end is connected to the input end of the air pump. The output end of the air pump is equipped with a barometer and is connected to the pressurization chamber.

10. The photovoltaic device based on HJT color cells according to claim 9, characterized in that: The pressure regulating component also includes a three-way pipe, the three ports of which are a first air inlet, a second air inlet, and an air outlet. The air outlet is connected to the input end of the dehumidifier, the first air inlet is connected to the outside, and the second air inlet is connected to the pressurization chamber. A switching valve is provided on the three-way pipe, and the switching valve has three forms. In the first form, the three ports of the three-way pipe are mutually isolated. In the second form, the first air inlet and the second air inlet are isolated and connected to the air outlet. In the third form, the second air inlet and the first air inlet are isolated and connected to the air outlet. A hygrometer is provided at the air outlet.

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