Power generation device based on large-size silicon wafer photovoltaic module

Abstract

The invention discloses a power generation device based on a large-size silicon wafer photovoltaic module. The power generation device comprises a support; the photovoltaic device comprises photovoltaic modules distributed on the bracket, and comprises a photovoltaic unit which comprises a battery layer, and adhesive film layers and glass plates are laminated on the two surfaces of the photovoltaic unit; the sealing inner ring is in sealing connection with the circumferential outer edges of the battery layer and the adhesive film layer; the packaging frame is in sealing connection with the glass plate and the circumferential outer edge of the sealing inner ring, and the packaging frame is a hard packaging frame formed by foaming and curing polyurethane; the photovoltaic power generation device further comprises locking assemblies which are arranged at the two ends of the photovoltaic device respectively and used for locking the photovoltaic assemblies on the support. According to the power generation device based on the large-size silicon wafer photovoltaic module, polyurethane is foamed around the photovoltaic unit to form a hard packaging frame, sealing connection of a packaging library and the photovoltaic unit is guaranteed, water prevention is achieved, meanwhile, shading around the photovoltaic unit is reduced, the sunlight receiving amount is increased, the power generation efficiency is improved, the weight is reduced, and the cost is reduced. Transportation and installation are convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic power generation, in particular to a power generation device based on large-size silicon wafer photovoltaic modules. BACKGROUND

[0002] The large-size silicon wafer photovoltaic module is a photovoltaic module made of a silicon wafer with a side length greater than 166 mm (the industry mainstream has developed to 182 mm, 210 mm, etc.), and the core is to increase the size of the silicon wafer to improve the power and power generation efficiency of the module.

[0003] In the prior art, the large-size silicon wafer module is usually packaged and connected by a frame composed of a pair of long profiles and a pair of short profiles, and the long profiles and the short profiles are fixedly connected by angle codes at the head and tail to realize the packaging and protection of the module and enhance the overall mechanical strength of the module. However, since the long profiles and the short profiles are made of metal materials, their length is large, which increases the overall weight of the photovoltaic module after packaging, making installation and transportation inconvenient, and the long profiles and the short profiles used for packaging usually block the edges of the front of the module, reducing the amount of sunlight that the photovoltaic module can receive, thereby reducing the photovoltaic power generation efficiency. Moreover, although the frame composed of the long profiles and the short profiles can be sealed and connected with the photovoltaic module by rubber, the sealing performance will decrease after long-term use due to aging of the rubber, and water vapor can easily enter the inside of the module, affecting the normal power generation of the battery.

[0004] Therefore, it is necessary to improve the large-size silicon wafer photovoltaic module power generation device in the prior art. SUMMARY

[0005] The present application aims to overcome the defects in the prior art and provide a power generation device based on large-size silicon wafer photovoltaic modules that reduces weight for convenient transportation and installation, reduces light blocking to improve power generation efficiency, and improves long-term waterproof sealing performance to ensure stable use.

[0006] To achieve the above technical effects, the technical solution of the present application is as follows: a power generation device based on large-size silicon wafer photovoltaic modules, comprising: a support for fixing to the top of a building; a photovoltaic device comprising a photovoltaic module distributed on the support along the width direction of the photovoltaic module, comprising: a photovoltaic unit comprising a cell layer, both sides of the cell layer being sequentially laminated with a film layer and a glass plate; a sealing inner ring sealingly connected with the circumferential outer edge of the cell layer and the film layer; An encapsulation frame is sealingly connected with the circumferential outer edge of the glass plate and the sealing inner ring, and is a hard encapsulation frame formed by curing polyurethane foam. The encapsulation frame is provided with a plug-in slot and a plug-in piece distributed along the width direction of the photovoltaic module. In two adjacent photovoltaic modules, one plug-in slot is plug-in matched with the other plug-in piece along the thickness direction of the photovoltaic module. The photovoltaic power generation device further comprises a locking assembly arranged at both ends of the photovoltaic device, for locking the photovoltaic module on the support.

[0007] Preferably, in order to further enhance the sealing and waterproof performance, the length and width dimensions of the battery layer and the adhesive film layer are equal, and the edges of the two layers coincide. The length and width dimensions of the glass plate are greater than those of the adhesive film layer. The circumferential outer edge of the adhesive film layer is adjacent to the inner side of the circumferential outer edge of the battery layer. The encapsulation frame is sealingly and fixedly connected with the circumferential outer edge of the glass plate. Along the thickness direction of the photovoltaic module, the projection of the sealing inner ring is spaced from the projection of the encapsulation frame.

[0008] Preferably, in order to enhance the sealing and waterproof performance of the encapsulation frame and the edge of the glass plate, a sealing groove and a sealing flange, which are sealingly connected and both are closed loops, are arranged between the encapsulation frame and at least one side of the glass plate.

[0009] Preferably, in order to reduce the amount of production material of the encapsulation frame, reduce the cost, reduce the weight, facilitate transportation and installation, the encapsulation frame comprises an outer encapsulation part sleeved outside the photovoltaic module and an upper encapsulation part, a middle encapsulation part and a lower encapsulation part integrally formed on the inner side of the outer encapsulation part and sequentially distributed from top to bottom along the thickness direction of the photovoltaic module. The lower encapsulation part is clamped between the rack and the corresponding glass plate. The middle encapsulation part is sealingly formed between the sealing inner ring, the outer encapsulation part and the edges of the glass plates on both sides. The thickness of the outer encapsulation part, the upper encapsulation part and the lower encapsulation part is less than or equal to the thickness of the glass plate.

[0010] Preferably, in order to delay the aging of the encapsulation frame and ensure the service life of the module, a sunscreen coating layer is arranged on the outer surface of the encapsulation frame.

[0011] Preferably, in order to enhance the sealing performance of the sealing inner ring and the encapsulation frame, the contact surface of the sealing inner ring and the encapsulation frame is densely covered with sealing recesses and sealing protrusions which are matched.

[0012] Preferably, in order to further enhance the sealing performance of the sealing inner ring and the encapsulation frame, the sealing inner ring is an elastic sealing inner ring.

[0013] Preferably, in order to realize the locking of the photovoltaic device at both ends, the locking assembly comprises: locking strips extending along the length direction of the photovoltaic module and abutting against the photovoltaic module at the ends of the photovoltaic device; sliding members arranged at the two ends of the locking strips and extending along the length direction of the photovoltaic module, the sliding members being provided with threaded interfaces whose axial lines are parallel to the thickness direction of the photovoltaic module; locking bolts corresponding to the sliding members, the rods of the locking bolts penetrating the locking strips and being threadedly connected with the inner walls of the threaded interfaces, and the caps of the locking bolts abutting against the locking strips.

[0014] Preferably, in order to ensure the stability of the connection between the photovoltaic device and the rack, the locking strip of one of the locking assemblies at the two ends is provided with an insertion strip which is inserted into the insertion groove, the insertion strip is inserted into the insertion groove and the locking strip abuts against the circumferential outer edge of the corresponding encapsulation frame and the slot of the corresponding insertion groove, and the locking strip of the other locking assembly is provided with an insertion sleeve which is inserted into the insertion member, the outer surface of the insertion member is sealingly fitted with the inner surface of the insertion sleeve and the locking strip abuts against the circumferential outer edge of the corresponding encapsulation frame.

[0015] Preferably, in order to facilitate assembly and fixation, the rack comprises transverse square tubes which are distributed side by side along the length direction of the photovoltaic module and correspond to the sliding members, the sliding members slidingly penetrate the ends of the transverse square tubes and the circumferential outer edges thereof are sealingly fitted with the circumferential inner walls of the transverse square tubes.

[0016] In summary, compared with the prior art, the photovoltaic device based on large-size silicon wafer photovoltaic modules of the present application adopts polyurethane to foam into a hard encapsulation frame around the photovoltaic unit, thereby ensuring the sealed connection between the encapsulation frame and the photovoltaic unit, achieving waterproofing, reducing the shading around the photovoltaic unit, improving the amount of sunlight received and thus the power generation efficiency, and reducing the weight, facilitating transportation and installation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application; Figure 2 is an exploded schematic diagram of Figure 1 Figure 3 is a structural schematic diagram of Figure 1 is a structural schematic diagram of another view; Figure 4 is a structural schematic diagram of the photovoltaic module of the present application; Figure 5 is an exploded schematic diagram of Figure 4 Figure 6 is a sectional structural schematic diagram of Figure 4 Figure 7 is a sectional structural schematic diagram of Figure 6 ​​​A enlarged view of A part of Fig. 1; Figure 8 Fig. 1 is a schematic view of a sectional structure of the packaging frame of the present application; Fig. 1 is a schematic view of a sectional structure of the packaging frame of the present application;Fig. 1 is a schematic view of a sectional structure of the packaging frame of the present application; 1, support; 11, transverse square tube; 12, longitudinal square tube; 2, photovoltaic unit; 21, cell layer; 22, adhesive film layer; 23, glass plate; 231, sealing groove; 232, reserved hole; 24, sealing lower ring; 25, junction box; 3, sealing inner ring; 31, sealing protrusion; 4, packaging frame; 41, insertion slot; 42, insertion piece; 43, sealing flange; 44, outer packaging part; 45, upper packaging part; 46, middle packaging part; 47, lower packaging part; 48, sealing recess; 5, locking assembly; 51, locking strip; 511, insertion strip; 512, insertion sleeve; 52, sliding piece; 521, threaded interface; 522, limiting plate; 53, locking bolt. DETAILED DESCRIPTION

[0018] The specific embodiments of the present application will be further described below in conjunction with the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0019] As shown in Fig. 1, a power generation device based on large-size silicon wafer photovoltaic assembly includes: Figures 1-8 support 1 for being fixed to the top of a building; photovoltaic device including photovoltaic assembly distributed on the support 1 along the width direction of the photovoltaic assembly, including: photovoltaic unit 2 including cell layer 21, both sides of the cell layer 21 sequentially laminated with adhesive film layer 22 and glass plate 23; sealing inner ring 3 sealingly connected with the circumferential outer edge of the cell layer 21 and the adhesive film layer 22; packaging frame 4 sealingly connected with the circumferential outer edge of the glass plate 23 and the sealing inner ring 3, the packaging frame 4 being a hard packaging frame 4 formed by polyurethane foaming and curing, the packaging frame 4 being provided with insertion slot 41 and insertion piece 42 distributed along the width direction of the photovoltaic assembly, one of the insertion slots 41 and the insertion pieces 42 being insertionally matched along the thickness direction of the photovoltaic assembly in the adjacent two photovoltaic assemblies; The photovoltaic power generation device further includes locking assembly 5 separately arranged at both ends of the photovoltaic device, for locking the photovoltaic assembly on the support 1.

[0020] The photovoltaic power generation device of the present application, the support 1 is fixed on the top of the building (such as roof), for laying photovoltaic device composed of a plurality of photovoltaic components, photovoltaic components laid along the width of the distribution, and the photovoltaic component itself both sides are provided with the matching plug slot 41 and plug 42, plug slot 41 slot and photovoltaic cell 2 battery layer 21 front are all upward, so that the adjacent two photovoltaic components in the laying, one of the photovoltaic components encapsulation frame 4 side plug 42 is inserted into the other photovoltaic component encapsulation frame 4 side plug slot 41 which has been laid on the support 1, so as to complete the laying of a plurality of photovoltaic components, so that a plurality of photovoltaic components are distributed in turn to form a photovoltaic device, and then the two ends of the photovoltaic device are locked by locking assembly 5, and the photovoltaic device is locked on the support 1, the installation of each photovoltaic component on the support 1 is completed, compared with the prior art, without the need for each photovoltaic component to be installed in turn, thereby reducing the workload of workers and improving the laying and installation efficiency. In the present application, the photovoltaic device includes three photovoltaic components, and of course, the number of photovoltaic components can also be other multiple according to actual needs.

[0021] It should be noted that the battery piece used in the photovoltaic cell battery layer 21 of the present application is a silicon wafer with a side length greater than 166mm, so as to ensure sufficient power generation efficiency.

[0022] Compared with the large size silicon wafer component of the prior art, in the photovoltaic component of the present application, the polyurethane foaming is cured to form a hard encapsulation frame 4, after foaming and curing, the encapsulation frame 4 is sealingly connected with the glass plate 23 and the sealing inner ring 3, and the circumferential outer edge of the battery layer 21 composed of the large size silicon wafer battery and the circumferential outer edge of the adhesive film layer 22 are sealingly connected, after using the structure, the polyurethane encapsulation frame 4 can realize waterproof sealing connection, and as the encapsulation frame 4, compared with the frame composed of angle code and metal profile, not only can significantly reduce the weight of the photovoltaic component, so as to facilitate the transportation and installation, but also the encapsulation frame 4 has good sealing property and waterproof property, prevents water vapor from invading the battery layer 21, ensures the long-term stable operation of the photovoltaic component, and the sealing inner ring 3 is arranged on the inner side of the encapsulation frame 4, forming a second sealing defense line, which can further enhance the sealing and waterproof property, and ensure the normal use of the photovoltaic component.

[0023] In addition, after the sealing inner ring 3 is arranged, a certain heat insulation effect can be achieved, and the encapsulation frame 4 does not affect the inner battery layer 21 during foaming and curing at high temperature. Since the polyurethane foaming process will produce an exothermic reaction, the reaction temperature is usually 60-80 DEG C, and the foaming process will produce an expansion pressure, which will threaten the battery layer 21 during foaming. After the sealing inner ring 3 is arranged, a certain heat insulation effect can be achieved, and the expansion pressure generated by the foaming process is inwardly extruded on the sealing inner ring 3, so that the battery layer 21 is not excessively extruded to cause the internal battery sheet to crack and damage, and the sealing inner ring 3 is sealingly clamped between the encapsulation frame 4 and the battery layer 21 and the adhesive film layer 22, thereby further enhancing the sealing connection, thereby ensuring the long-term stable and reliable operation of the photovoltaic module.

[0024] In the present application, as shown in the drawings, Figures 1-3 The bracket 1 includes two transverse square tubes 11 and four longitudinal square tubes 12. The transverse square tubes 11 and the longitudinal square tubes 12 have the same cross-sectional shape and size. The transverse square tubes 11 extend along the width direction of the photovoltaic module and are arranged side by side. The longitudinal square tubes 12 extend along the length direction of the photovoltaic module and are arranged side by side at equal intervals between the two transverse square tubes 11. The two ends of the longitudinal square tubes 12 are respectively welded and fixedly connected with the two transverse square tubes 11. The four longitudinal square tubes 12 are arranged one by one below the side portions of the three photovoltaic modules. The transverse square tubes 11 and the longitudinal square tubes 12 abut below the edges of the encapsulation frame 4 of the photovoltaic module to stably support the photovoltaic module.

[0025] As shown in the drawings, Figure 5 In the photovoltaic unit 2 of the present application, a reserved hole 232 in the through hole is formed in the glass plate 23 below the battery layer 21. The glass plate 23 below is sealingly and fixedly connected with the junction box 25 through the sealing lower ring 24. The reserved hole 232 is for the cable to pass through, so as to connect the battery layer 21 with the junction box 25. The lead-out wire connected with the junction box 25 is connected with the storage battery or the electric device, so as to store the electric energy generated by the photovoltaic power generation of the photovoltaic module into the storage battery or supply the electric device. The hole opening at the bottom of the reserved hole 232 is located inside the sealing lower ring 24. The sealing lower ring 24 is a rubber ring or a silica gel ring, so as to achieve waterproof connection and avoid water vapor from entering.

[0026] Further improvement is that the length and width dimensions of the battery layer 21 and the adhesive film layer 22 are equal, and the edges of the two layers coincide. The length and width dimensions of the glass plate 23 are greater than those of the adhesive film layer 22. The circumferential outer edge of the adhesive film layer 22 is adjacent to the inner side of the circumferential outer edge of the battery layer 21. The encapsulation frame 4 is sealingly and fixedly connected with the circumferential outer edges of the glass plate 23 and the two surfaces. In the thickness direction of the photovoltaic module, the projection of the sealing inner ring 3 is separated from the projection of the encapsulation frame 4.

[0027] Specifically, as shown in the drawings, Figures 5-7As shown, the length and width of the cell layer 21 and the adhesive film layer 22 are equal, which facilitates the alignment of the edges, and the length and width of the two glass plates 23 are greater than those of the cell layer 21 and the adhesive film layer 22, respectively. The two glass plates 23 have the same size, and the cell layer 21 and the adhesive film layer 22 are located between the two glass plates 23. After the encapsulation frame 4 is foamed and cured, it is sealed and connected to the circumferential outer edge of the two glass plates 23 and is also cured and formed on the front and back surfaces of the edge of the two glass plates 23, so that the encapsulation frame 4 is sealed and connected to the circumferential outer edge and the edge of the two glass plates 23, thereby increasing the sealing contact area of the encapsulation frame 4 and the glass plates 23, enhancing the combination of the encapsulation frame 4 and the glass plates 23, and preventing water vapor from entering.

[0028] Further improvement is that the sealing groove 231 and the sealing flange 43, which are in sealing connection and both are closed loops, are arranged between the encapsulation frame 4 and at least one surface of the glass plate 23.

[0029] Specifically, the two surfaces of the glass plate 23 are both provided with the closed-loop sealing groove 231. Two sealing grooves 231 are formed on the edges of the front and back surfaces of the glass plate 23 by laser slotting, so that the polyurethane forms the sealing flange 43 corresponding to the sealing groove 231 after being foamed and cured into the encapsulation frame 4. In this way, the contact area of the encapsulation frame 4 and the glass plate 23 is increased, the bonding force between them is enhanced, and they are prevented from being separated. At the same time, the sealing performance is further improved, and water vapor is prevented from entering the cell layer 21.

[0030] Further improvement is that the contact surface of the sealing inner ring 3 and the encapsulation frame 4 is densely covered with the sealing recess 48 and the sealing protrusion 31 which are matched.

[0031] After adopting this design, the contact area of the sealing inner ring 3 and the encapsulation frame 4 is increased, the bonding force between them is enhanced, and they are prevented from being separated. At the same time, the sealing performance is further improved, and water vapor is prevented from entering.

[0032] Specifically, the sealing protrusions 31 are densely arranged on the circumferential outer edge of the sealing inner ring 3, and the sealing recesses 48 are integrally formed on the packaging frame 4, both of which are semispherical in shape, which can increase the thickness of the sealing inner ring 3, further enhance the heat insulation capacity, and reduce the influence of the packaging frame 4 on the inner battery layer 21 during foaming and solidification.

[0033] Further improvement is that the sealing inner ring 3 is a flexible sealing inner ring 3. With this design, the sealing inner ring 3 can deform elastically to withstand the pressure caused by the expansion of polyurethane during foaming, thereby reducing the pressure and adverse effects on the inner battery layer 21, while ensuring the sealing and waterproof performance of the sealing inner ring 3 on both sides.

[0034] In the present application, the sealing inner ring 3 is preferably a flexible heat insulation film strip, which is cut to a certain extent and then fixedly connected at both ends by heat fusion to form a sealing inner ring 3 that sealingly wraps around the circumferential outer edge of the battery layer 21 and the adhesive film layer 22. The material of the sealing inner ring 3 is preferably silicone or glass fiber. On the one hand, it has a low thermal conductivity, which can block the heat generated during polyurethane foaming. On the other hand, it can deform elastically to slow down the expansion pressure and absorb the pressure during the solidification and molding of the packaging frame 4, thereby avoiding affecting the inner battery layer 21. In addition, it also ensures that the sealing inner ring 3 has a certain waterproof capability, forming a double-layer protection with the outer packaging frame 4 to further block the intrusion of external moisture, thereby ensuring the long-term stable operation of the photovoltaic module.

[0035] Further improvement is that the outer surface of the packaging frame 4 is provided with a sunscreen spray coating.

[0036] Preferably, the sunscreen spray coating is an acrylic anti-aging coating or a PVDF fluorocarbon coating. By providing a sunscreen spray coating on the outer surface of the packaging frame 4, the aging erosion of the packaging frame 4 caused by ultraviolet light and high temperature during polyurethane foaming can be effectively reduced, thereby prolonging the service life of the packaging frame 4 and avoiding the cracking of its surface, which leads to the failure of the sealing and waterproof performance.

[0037] Further improvement is that the packaging frame 4 includes an outer packaging portion 44 that is sleeved outside the photovoltaic module and an upper packaging portion 45, a middle packaging portion 46, and a lower packaging portion 47 that are integrally formed inside the outer packaging portion 44 and sequentially distributed along the thickness direction of the photovoltaic module from top to bottom. The lower packaging portion 47 is clamped between the rack and the corresponding glass plate 23, the middle packaging portion 46 is sealingly formed between the sealing inner ring 3, the outer packaging portion 44, and the edges of the glass plates 23 on both sides, and the thickness of the outer packaging portion 44, the upper packaging portion 45, and the lower packaging portion 47 is less than or equal to the thickness of the glass plate 23.

[0038] Specifically, as shown in FIG. 1, the packaging frame 4 is provided with a sealing inner ring 3 and a packaging frame 4. Figure 7As shown, the outer packaging portion 44, the upper packaging portion 45, the middle packaging portion 46 and the lower packaging portion 47 in the packaging frame 4 are all rectangular frame structures, and the upper packaging portion 45 and the lower packaging portion 47 are provided with two sealing flanges 43 on the side adjacent to the middle packaging portion 46 and the upper and lower sides of the middle packaging portion 46, so as to cooperate with the two sealing grooves 231 at the edge of the glass plate 23, to realize the sealing and fixed connection of the packaging frame 4 and the glass plate 23, and the circumferential inner wall of the middle packaging portion 46 is densely covered with hemispherical sealing recesses 48, so as to strengthen the sealing and waterproof connection with the sealing inner ring 3.

[0039] The thicknesses of the outer packaging portion 44, the upper packaging portion 45 and the lower packaging portion 47 are all less than the thickness of the glass plate 23, and by adopting the design, on the one hand, the amount of polyurethane required for foaming and forming the packaging frame 4 can be reduced, and the production cost can be reduced, on the other hand, the weight of the photovoltaic module can be reduced, and the transportation and installation are facilitated, and on the other hand, the size of the photovoltaic module can be reduced, the occupied area for laying can be reduced, more photovoltaic modules can be installed on the limited laying area, and the overall photovoltaic power generation capacity can be improved.

[0040] In the application, the plug-in groove 41 and the plug-in piece 42 are respectively integrally connected to the two ends of the outer packaging portion 44, the plug-in groove 41 and the plug-in piece 42 both extend along the length direction parallel to the photovoltaic module, the cross-sectional shape of the plug-in piece 42 is L-shaped, the two ends of the plug-in groove 41 are closed and flush with the two ends of the plug-in piece 42. By adopting the above structure, when connecting two adjacent photovoltaic modules, first, one of the photovoltaic modules is laid on the support 1, the plug-in piece 42 on the other photovoltaic module is aligned with the plug-in groove 41 of the previous photovoltaic module, the photovoltaic module is laid downward, so that the plug-in piece 42 of the latter photovoltaic module is inserted into the plug-in groove 41 of the former photovoltaic module, and the end of the plug-in piece 42 is attached to the groove bottom and the two side walls of the plug-in groove 41. According to the above steps, the photovoltaic modules are sequentially laid on the support 1, the photovoltaic device is formed, then the locking assembly 5 is operated at the two ends of the photovoltaic device, the photovoltaic device is locked and fixed on the support 1, and the fixing and installation of all photovoltaic modules on the support 1 are completed.

[0041] In order to realize the locking of the photovoltaic device on the support 1, in the application, the locking assembly 5 comprises: A locking strip 51 extending along the length direction parallel to the photovoltaic module and abutting against the photovoltaic module at the end of the photovoltaic device; A sliding piece 52 provided at the two ends of the locking strip 51 and extending along the length direction parallel to the photovoltaic module, and a threaded interface 521 is arranged on the sliding piece 52, and the axis of the threaded interface 521 is parallel to the thickness direction of the photovoltaic module; A locking bolt 53 corresponding to the sliding piece 52, the rod part penetrates through the locking strip 51 and is threadedly connected with the inner wall of the threaded interface 521, and the cap part abuts against the upper side of the locking strip 51.

[0042] Further specifically, in the locking assembly 5 at two ends, the bottom surface of one of the locking strips 51 is provided with an insertion strip 511 which is inserted into the insertion groove 41, the insertion strip 511 is inserted into the insertion groove 41 and the locking strip 51 abuts against the circumferential outer edge of the corresponding packaging frame 4 and the slot of the corresponding insertion groove 41, and the bottom surface of the other locking strip 51 is provided with an insertion sleeve 512 which is inserted into the insertion piece 42, the outer surface of the insertion piece 42 is sealingly fitted with the inner surface of the insertion sleeve 512 and the locking strip 51 abuts against the circumferential outer edge of the corresponding packaging frame 4; the sliding piece 52 is slid through the end of the transverse square tube 11 and the circumferential outer edge is sealingly fitted with the circumferential inner wall of the transverse square tube 11.

[0043] After the above structure, each photovoltaic module is laid on the support 1 in turn, so that one of the two adjacent photovoltaic modules is inserted into the insertion groove 41 of the other, and the laying of each photovoltaic module is completed; then, the insertion strip 511 of one of the two locking strips 51 at the ends is inserted into the insertion groove 41 at one end of the photovoltaic device, and the insertion sleeve 512 of the other locking strip 51 is sleeved on the insertion piece 42, both of the two locking strips 51 abut against the packaging frame 4 of the corresponding photovoltaic module, then holes are punched on the locking strip 51 and the transverse square tube 11, after the punching is completed, the sliding piece 52 is inserted into the end of the transverse square tube 11, so that the threaded interface 521 on the sliding piece 52 is located directly below the punching position of the locking strip 51 and the transverse square tube 11, and the locking bolt 53 is screwed downward, so that the rod portion of the locking bolt 53 penetrates through the top side wall of the locking strip 51 and the transverse square tube 11 and is threadedly connected with the inner wall of the threaded interface 521 on the sliding piece 52, and the cap portion of the locking bolt 53 is pressed downward on the insertion groove 41 or the insertion piece 42, so as to lock and fix the photovoltaic module at the end on the transverse square tube 11 and the longitudinal square tube 12 of the support 1, and the above operation is sequentially performed on the remaining positions of the photovoltaic device, so as to finally lock and fix each photovoltaic module on the support 1, and the locking and fixing installation of the photovoltaic device is completed. In order to avoid that the sliding piece 52 cannot be taken out after being completely inserted into the transverse square tube 11, one end of the sliding piece 52 is integrally connected with a limiting plate 522, the length and width dimensions of the limiting plate 522 are greater than the length and width dimensions of the cross section of the inner cavity of the transverse square tube 11, so as to achieve the limiting effect of the sliding piece 52.

[0044] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the technical principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A power generation device based on large-size silicon wafer photovoltaic modules, characterized by, The photovoltaic power generation device comprises a support fixed to the top of a building, a photovoltaic device comprising photovoltaic modules distributed along the width direction of the photovoltaic modules on the support, and a locking assembly arranged at the two ends of the photovoltaic device for locking the photovoltaic modules on the support. The length and width of the cell layer and the EVA film layer are equal, and the edges of the two are coincident, the length and width of the glass plate are greater than those of the EVA film layer, the outer edge of the EVA film layer is adjacent to the inner side of the outer edge of the cell layer, the outer edge of the glass plate is sealingly and fixedly connected with the outer edge of the encapsulation frame, and the projection of the sealing inner ring is spaced from the projection of the encapsulation frame in the thickness direction of the photovoltaic module. The encapsulation frame and at least one side of the glass plate are sealingly connected and are both closed loops. The encapsulation frame comprises an outer encapsulation part sleeved outside the photovoltaic module and an upper encapsulation part, a middle encapsulation part and a lower encapsulation part integrally formed on the inner side of the outer encapsulation part and sequentially distributed from top to bottom in the thickness direction of the photovoltaic module, the lower encapsulation part is clamped between the rack and the corresponding glass plate, the middle encapsulation part is sealingly formed between the sealing inner ring, the outer encapsulation part and the edges of the glass plates on both sides, and the thicknesses of the outer encapsulation part, the upper encapsulation part and the lower encapsulation part are less than or equal to the thickness of the glass plate. The outer surface of the encapsulation frame is provided with a sunscreen spray layer. The contact surface of the sealing inner ring and the encapsulation frame is densely covered with a sealing recess and a sealing protrusion. The sealing inner ring is an elastic sealing inner ring.

2. The power generation device based on large-size silicon wafer photovoltaic modules according to claim 1, characterized in that: The locking assembly comprises a locking strip extending in the length direction of the photovoltaic module and abutting the photovoltaic module at the end of the photovoltaic device, a sliding member arranged at the two ends of the locking strip and extending in the length direction of the photovoltaic module, a threaded interface provided on the sliding member and having an axis parallel to the thickness direction of the photovoltaic module, and a locking bolt corresponding to the sliding member, the rod part of the locking bolt penetrating through the locking strip and being threadedly connected with the inner wall of the threaded interface, and the cap part abutting above the locking strip.

3. The power generation device based on large-size silicon wafer photovoltaic modules according to claim 2, characterized in that: ​ 4. The power generation device based on large-size silicon wafer photovoltaic module according to claim 3, characterized in that: ​ 5. The large-size silicon wafer photovoltaic module based power generating device according to any one of claims 1, wherein: ​ 6. The power generation device based on large-size silicon wafer photovoltaic module according to claim 1, characterized in that: ​ 7. The power generation device based on large-size silicon wafer photovoltaic module according to claim 1, characterized in that: ​ 8. The power generation device based on large-size silicon wafer photovoltaic module according to claim 1, characterized in that: ​ ​ ​ ​ 9. The power generation device based on large-size silicon wafer photovoltaic module according to claim 8, characterized in that: The locking assembly at two ends, one of which is provided with an insertion strip on the bottom surface of the locking strip, which is inserted into the insertion slot and abuts against the circumferential outer edge of the corresponding packaging frame and the slot of the corresponding insertion slot; the other is provided with an insertion sleeve on the bottom surface of the locking strip, which is inserted into the insertion piece and the outer surface of the insertion piece is sealingly fitted with the inner surface of the insertion sleeve and the locking strip abuts against the circumferential outer edge of the corresponding packaging frame.

10. The power generation device based on large-size silicon wafer photovoltaic module according to claim 9, characterized in that: The rack includes transverse square tubes distributed side by side along the length direction of the photovoltaic assembly and corresponding to the sliding pieces, the sliding pieces slidingly penetrate the end of the transverse square tube and the circumferential outer edge sealingly fits the circumferential inner wall of the transverse square tube.

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