PHOTOVOLTAIC BUILDING MATERIAL WITH ABILITY OF SAFE ELECTRIC POWER GENERATION

Abstract

A photovoltaic building material, which can safely generate electric power with solar power energy is disclosed. The photovoltaic building material can be used as building material, and can be directly installed on the fixed part of the building, such as roof, wall or decoration materials on the surface of building. The photovoltaic building material is accord with the architectural requirements of waterproof, fireproof, load-carrying ability, durability and heat-insulation. When this invention is installed on the roof, the automatic spraying device can be set up on the height of ridge, which realizes the functions of roof cleaning and cooling down by the automatic water spraying. Also, with the auxiliary device, this invention can intensify the ability to withstand strong winds for roof, and can ensure safety in the typhoon/hurricane area.

Claims

1. A photovoltaic building material with ability of safe electric power generation comprising a metal back plate fixed on a fixed part of a building through transverse or longitudinal connection; a glass plate, wherein a nano-coating is provided upon the glass plate, and the glass plate is provided on the metal back plate; a plastic film connected to a solar cell, the metal back plate and the glass plate, wherein the solar cell is fixed between the metal back plate and the glass plate; and an automatic spraying device assembled at adjacently relative height around the photovoltaic building material, wherein the automatic spraying device provides a water jet on the photovoltaic building material.

2. The photovoltaic building material according to claim 1, wherein the metal back plate has a thickness ≤2 mm and ≥0.1 mm, and the metal back plate is one of an aluminum-zinc alloy coated steel sheet, a zinc-coated steel sheet, a color steel sheet, an aluminum-magnesium alloy sheet, an aluminum alloy sheet, a stainless steel sheet, and an aluminum-magnesium-manganese alloy sheet.

3. The photovoltaic building material according to claim 1, wherein a voltage generated from the photovoltaic building material is less than 48V.

4. The photovoltaic building material according to claim 1, wherein a series circuit of the solar cell is serially manufactured by a usage of process of soldering circuit or laminae bonding, and a parallel circuit of the solar cell is parallelly manufactured by a usage of process of conductivity film strip or transfer printing of conductor.

5. The photovoltaic building material according to claim 1, wherein the solar cell comprises one of a regular single crystalline-silicon cell, a polysilicon cell, a Passivated Emitter Rear Contact (PERC) cell, a Heterojunction with Intrinsic Thin layer (HIT/HJT) cell, an Interdigitated Back Contact (IBC) cell, a Copper Indium Gallium Selenide (CIGS) cell, a thin-film micro crystal silicon cell, and a perovskite cell.

6. The photovoltaic building material according to claim 1, wherein the glass plate comprises one of a thin glass, a photovoltaic glass with nano-coating, an ultra-thin glass composed of organic and inorganic materials, a film plating glass, and a glass composed of complexed transparent material.

7. The photovoltaic building material according to claim 1, wherein the plastic film comprises one of a POE film, a PVB film, a complexed film composed of POE+PVB, and a complexed film composed of POE+PVB+reducing infrared spectrum reflection.

8. The photovoltaic building material according to claim 1, wherein a water channel is formed from top to bottom at an overlapped position where a lower photovoltaic material is covered by an upper photovoltaic material, wherein rainwater flows and is discharged through the water channel, or a waterproof sealing element used for preventing rainwater from going into the overlapped position is set up at the overlapped position between upper and lower photovoltaic materials.

9. The photovoltaic building material according to claim 8, wherein at least a stiffening rib is set up at the overlapped position between upper and lower photovoltaic building materials.

10. The photovoltaic building material according to claim 1, wherein an underside DC circuit lead-out wire is set up on the photovoltaic building material, and wherein the underside DC circuit lead-out wire passes through a hole at a grooved edge of the fixed part of the two photovoltaic building materials, enters into a closed slot below a waterproof cover, is assembled inside a groove at an overlapped position of the fixed part of the two photovoltaic building materials and forms a closed DC cable slot with the waterproof cover.

11. The photovoltaic building material according to claim 10, wherein the waterproof cover is independent of the photovoltaic building material, and the waterproof cover has a different color of meatal material property from the photovoltaic building material.

12. The photovoltaic building material according to claim 1, wherein the automatic spraying device is assembled on an upper position of a roof ridge in order to provide the water jet on the photovoltaic building material.

13. The photovoltaic building material according to claim 13, further comprising: a rainwater reclaiming device set up at a relative lower position of a roof, wherein the automatic spraying device is connected to the rainwater reclaiming device, and the rainwater reclaiming device reclaims the water flowing down from the roof or the metal back plate, and the rainwater reclaiming device guides the water onto the spraying device after the water being processed by a filtering system.

14. The photovoltaic building material according to claim 1, further comprising: a reverse wing device assembled on a main structure, wherein the reverse wing device enhances a downforce of the building when suffering from a strong wind.

15. The photovoltaic building material according to claim 1, further comprising: a plurality of cable trays assembled on an edge of a roof or on a ridge, wherein when receiving a strong wind, the cable tray forms a turbulent flow to destroy the wind field of the strong wind, hence reduce damage to the roof.

16. The photovoltaic building material according to claim 1, further comprising: a plurality of wind turbines, wherein the wind turbines are assembled on an edge of a roof and arranged in array type, and the wind turbines are arranged to form a wind turbine wall structure and absorb partial wind power.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG. 1 is a top view of the photovoltaic building material with underside lead-out form in the present invention.

[0044] FIG. 2 is a back view of the photovoltaic building material with underside lead-out form in the present invention.

[0045] FIG. 3-1 is a cross-section schematic view from B-B′ section of a back plate of the photovoltaic building material with underside lead-out form in the present invention.

[0046] FIG. 3-2 is a cross-section schematic view from A-A′ section of a back plate of the photovoltaic building material with underside lead-out form in the present invention.

[0047] FIG. 3-3 is a cross-section schematic view from C-C′ section of a back plate of the photovoltaic building material in the present invention.

[0048] FIG. 3-4 is a schematic view of fixed parts and a waterproof cover of the photovoltaic building material in the present invention.

[0049] FIG. 4 is a cross-section partial profile of the photovoltaic building material in the present invention.

[0050] FIG. 5 is an arrangement schematic view of solar cells of the photovoltaic building material in the present invention.

[0051] FIG. 6 is a partial zoom-in schematic view of M in FIG. 5.

[0052] FIG. 7-1 is a schematic view of an assembling structure of the photovoltaic building material with underside lead-out form in the present invention.

[0053] FIG. 7-2 is a schematic view of an overlapped fixed part of the photovoltaic building material with underside lead-out form showing before and after overlapping in the present invention.

[0054] FIG. 8-1 is an overlap schematic view of the photovoltaic building material while assembling along with the rainwater in the present invention.

[0055] FIG. 8-2 is a cross-section schematic view from F-F′ section of the assembled photovoltaic building material in the present invention after being passed through by rainwater.

[0056] FIG. 9 is a schematic view of the photovoltaic building material while using power generating system in the present invention.

[0057] FIG. 10-1 is a schematic view of a rainwater automatic reclaiming and spraying system of the photovoltaic building material in the present invention.

[0058] FIG. 10-2 is a schematic view of an assembled water pipe on ridge in the present invention.

[0059] FIG. 11-1 is a schematic view of an auxiliary device for resisting strong wind on roof in the present invention.

[0060] FIG. 11-2 is a cross-section schematic view from G-G′ section of an auxiliary device for resisting strong wind on roof in the present invention.

[0061] FIG. 12 is a partial zoom-in schematic view of an assembled wind-resisting Reverse Wing device and an assembled wind-resisting cable tray(spoiler) on roof of new building in the present invention.

[0062] FIG. 13 is a partial zoom-in schematic view of an assembled wind-resisting Reverse Wing device and an assembled wind-resisting cable tray(spoiler) on roof of old building in the present invention.

[0063] FIG. 14 is a schematic view of an assembled wind-resisting Reverse Wing device on roof in the present invention.

[0064] FIG. 15 is a partial zoom-in schematic view of an assembled wind-resisting horizontal axis wind turbine and an assembled wind-resisting cable tray on bottom side of roof in the present invention

[0065] FIG. 16 is a schematic view of an assembled wind-resisting horizontal axis wind turbine in the present invention.

[0066] FIG. 17 is a schematic view of an assembled wind-resisting vertical axis wind turbine in the present invention.

[0067] FIG. 18 is a schematic view of a plurality of assembled wind turbine that forming wind turbine wall on roof in the present invention.

DESCRIPTION OF EMBODIMENTS

[0068] The following provides a detailed description of the embodiments along with the accompanied drawings to facilitate the understanding of the technical features and effects of the present invention.

[0069] Please refer to FIG. 1, it is a top view of a photovoltaic building material 1 in the present invention. A metal back plate 10, a glass plate 11, a solar cell 12 and a plastic film 13 showing in FIG. 4 may be comprised of photovoltaic building material 1 of the present invention, wherein the metal back plate 10 and the glass plate are fireproof or non-combustible materials. The metal back plate 10 as mentioned above may be a metal back plate with a thickness 2 mm and 0.1 mm in order to bear most of the range forces applied through the glass plate 11 by an external source, therefore, a problem of rupture caused by a usage of organic materials or glasses in the prior art is avoided, and the photovoltaic building material 1 is able to be substituted for a steel tile.

[0070] Specifically but not limited to, the metal back plate 10 in the present invention may be an aluminum-zinc alloy coated steel sheet, a zinc-coated steel sheet, a stainless steel, a color steel sheet, an aluminum-magnesium alloy sheet, an aluminum alloy sheet, a, an aluminum-magnesium-manganese alloy sheet, etc. In addition, a fixed part 101 for fixing the metal back plate 10 at a building may be provided by the back plate 10. More particularly but not limited to, shapes of the fixed part 101 may be W, V or the combination thereof, and the back plate 10 and the fixed part 101 may be an overall same material and integrated together. Refer FIG. 2, FIG. 3-1, FIG. 3-2 and FIG. 3-4 to be an example, a V shaped fixed part 1010 and a W shaped fixed part 1011 may be provided by the opposite two sides of the photovoltaic building material 1 respectively, such an underside lead-out form as shown in FIG. 7-2, but it is not limited in the present invention.

[0071] Specifically but not limited to, the solar cell 12 may be a regular single crystalline-silicon cell, a polysilicon cell, a Passivated emitter rear contact (PERC) cell, a Heterojunction with Intrinsic Thin layer (HIT/HJT) cell, an Interdigitated Back Contact (IBC cell), a Copper indium gallium selenide (CIGS) cell, a thin-film micro crystal silicon cell, a perovskite cell etc., but it is not limited in the present invention.

[0072] Specifically but not limited to, the glass plate 11 may be a regular ultra-clear glass, a solar glass with nano-coating, an ultra-thin glass composed of organic and inorganic materials, a film plating glass reflecting infrared ray or a complexed transparent material with weathering resistance over 20 years, but it is not limited in the present invention.

[0073] Specifically but not limited to, the plastic film 13 may be a specially made POE film, a complexed film composed of POE+PVB, or a complexed film composed of POE+PVB+reducing infrared spectrum reflection, but it is not limited in the present invention.

[0074] The solar cell 12 as mentioned above may be fixed between the metal back plate 10 and the glass plate 11 through the plastic film 13. Specifically but not limited to, the plastic film 13 may extend from the top side of top surface of the solar cell 12 and along the lateral side onto surface of the metal back plate 10, and a part of the plastic film 13 is positioned between the solar cell 12 and the glass plate 11. Showing in FIG. 4, the plastic film 13 may extend along the lateral side and onto the surface of the back plate 10, such that the solar cell 12 is surrounded by the plastic film 13. Or the plastic film 13 may extend along the lateral side and onto a position of the back plate 10 without being covered by the solar cell 12, such that the solar cell 12 is fastened onto the back plate 10 by the plastic film 13. The plastic film 13 may be formed by self-melting glue after sealing, and a plate with a completely and rigidly sealed edge may be formed by the back plate 10, the glass plate 11 and the self-melting glue after the sealing. In the condition that a wire led from the solar cell 12 and through the plastic film 13, a plate with completely and rigidly sealed edge except for an opening connected to the outside may be at least formed by the plastic film 13 and the back plate 10, i.e., the wire of the solar cell 12 may be led to outside through the opening. In addition, the glue may be a clear POE/PVB hot-melt film, but it is not limited in the present.

[0075] A heat resistant temperature may be increased through performing a crosslinking reaction for POE/PVB in the present invention, therefore resulting in a reduced permanent deformation, and resulting in greatly improved tensile strength, tear strength, etc. of major mechanical properties. Good performances such as aging resistant, ozone resistant, chemical resistant, etc. are presented through POE/PVB after the crosslinking reaction. The greatest advantages of the POE/PVB plastic film are low-moisture transmission rate and high-volume resistivity, such that the safety operation under high temperature-high humidity and long-term aging resistance of photovoltaic building material 1 are proven, and the photovoltaic building material 1 is capable of using for at least 25 years. Specifically speaking, the better performance comparing the photovoltaic building material 1 sealed by POE/PVB plastic film to the same sealed by EVA plastic film are as below.

[0076] 1. The POE plastic film is a copolymer of ethylene and octane and has less Tertiary carbon atom in the molecular chain. Good weatherability, UV aging resistance, excellent heat resistance, low-temperature resistance are represented. Therefore, a better aging resistance than an EVA plastic film is represented by the POE plastic film. PVB is used for interlayer film of a fireproof and bulletproof safety glass, has a long history and outstanding thermoset, thermal stability and bonding performance.

[0077] A bonding force between the POE/PVB plastic film and the glass plate 11, and the metal back plate 10 is improved through a modification method such as a photo-grafting polymerization monomer, plasma surface treatment or reactive graft modification etc., therefore there is a good interface bonding performance in the present invention.

[0078] 3. The POE/PVB plastic film with a lower water vapor transmission rate and a greater cohesive force is more suitable for building-integrated modules. A combination of the glass plate 11 and the metal back plate 10 is a research and development result of the present invention, such that the extra sealing edge is not required and service life is longer in the manufacturing of building-integrated modules.

[0079] As showing in FIG. 5, if a quantity of the solar cell 12, a wire layout between the pluralities of solar cells 12 is a net structure. Specifically but not limited to, a serial-parallel net structure may be used by the net structure, for example, a parallel circuit is further provided based on a serial circuit. For example, if a rectangle net connection is formed between the pluralities of solar cells 12, except for the solar cell 12 in a corner, each one of the other solar cells 12 are connected to at least three solar cells 12. If the other shaped net connection is formed between the pluralities of solar cells 12, each one of the most solar cells 12 are connected to at least three solar cells 12. A zoom-in location M as showing in FIG. 5 and a zoom-in FIG. 6 thereof, the plurality of solar cells 12 forming the net connection may be connected by a back-connection wire of the cell 121 or a front connection wire of the cell 120. A solar cell 12 wire layout of the present invention ensures that there are more than three wires guiding current in the most cells by the usage of the net structure instead of traditional series connection structure wire layout, and the back-connection wire of the cell 121 may connected by one of a process of conductivity film strip or transfer printing conductor, therefore heating resulted from loading (i.e., hot spot effect) resulted from the shade is prevented.

[0080] In addition, the glass plate 11 may be an ultra-clear glass with a transparent nano-coating (this design complies with the ((technical requirements for reduced reflection coating glass used for crystalline silicon photovoltaic elements)), Standard No. SEMI PV47-0513), i.e., self-cleaning and anti-slip high hardness ultra-thin transparent glass, the surface thereof is processed by embossed, reinforced and sprayed nano-coatings at high temperature, i.e., the light transmission rate is increased to about 95% and the self-cleaning function and the anti-slip function are presented. The glass plate 11 of the present invention is not a regular embossed ultra-transparent glass used for the solar module in the prior art. Therefore, the following effect is representing by the usage of the glass plate 11 in the present invention.

[0081] 1. Improved light transmission rate, the light transmission rate of the ultra-clear glass is increased by 5% with nano-scale optical coating technology, therefore an output power of the photovoltaic building material 1 is improved.

[0082] 2. A strong self-cleaning function, good appearance for a long time and a self-cleaning effect for a long time may be maintained by a nano-scale inorganic silicon oxide coating, and a manual cleaning is not required due to an ultra-hydrophilic feature, i.e., a pollution is fallen off in the raining condition by the rainwater self-washing.

[0083] 3. An improved scratch-resistant hardness, hardness 3H anti-scratch effect may be achieved after strengthening,

[0084] 4. Coating layer with high chemical stability, high thermal stability, high-temperature variation resistance, aging resistance, acid, and alkali corrosion resistance provides the solar glass to maintain stably clear and anti-pollution performance for a long time in the outdoor application.

[0085] Another assembling structure of the photovoltaic building material 1 with underside lead-out form is provided by the present invention. As showing in FIG. 7-1, FIG. 7-2, FIG. 8-1 and FIG. 8-2, and referring to FIG. 1, and FIG. 3-4, a plurality of the photovoltaic building materials 1 overlapped each other, a waterproof cover 9 and a self-tapping screw 7 are comprised of the assembling structure of the photovoltaic building material 1. Wherein the fixed part 101 of the photovoltaic building material 1 is overlapped by another adjacent fixed part 101 of photovoltaic building material 1, and the self-tapping screw 7 is provided at the overlapped position. The plurality of photovoltaic building materials 1 overlapped each other are fixed at the building 6 through the self-tapping screw 7. As showing in FIG. 2, FIG. 3-1, FIG. 3-2 and FIG. 7-2, a lead-out wire 14 passes through a circular hole 10101 of a V shaped fixed part 1010 of the photovoltaic building material 1, and the V shaped fixed part 1010 is overlapped onto an another adjacent W shaped fixed part 1011 of the photovoltaic building material 1 in vertical direction, and at the same time, a lead-out wire 14 may pass through a circular hole 10101 of the V shaped fixed part 1010 and an U shaped hole 10111 of the W shaped fixed part 1011 without interference. For example, a position where the building 6 and the photovoltaic building material 1 are fixed may be a purlin structure of a roof, but it is not limited in the present invention. In addition, when the photovoltaic building material 1 of the present invention is assembled, it is only required to perform assembling with single construction surface and standing on the roof through the usage of a connection between the self-tapping screw and the purlin of the roof instead of complicated ducks mounting or bolt-nut through connection.

[0086] In particular but not limited to, as showing in FIG. 3-4 and FIG. 7-1, an engagement groove bent inward is provided by the waterproof cover 9, and a flange 91 extending outward is provided at two sides of the engagement groove. The engagement groove is provided above the overlapped position of the plurality of V-shaped fixed parts 1010 and the plurality of W-shaped fixed parts 1011, and the flanges 91 at two sides of the engagement groove are respectively fixed at the glass plate 11 of the plurality of adjacent photovoltaic building materials 1. In addition, a waterproof sealing element 8 is further provided between the glass plate 11 and the flange 91 of the waterproof cover 9. Furthermore, the waterproof cover 9 may be independent of the photovoltaic building material 1 so as to be replaced and may be made of different colors of various materials or different colors of metal material, for example, a yellow mark for alarming electric wire passes through or a brightly colored mark for alarming dangerous area.

[0087] Specifically but not limited to, an underside lead-out form is used based on a lead-out wire 14 of the photovoltaic building material 1, the lead-out wire 14 passes through an adjacent circular hole 10101 of a V shaped fixed part 1010 and enters into a closed slot below the waterproof cover 9, is assembled inside a groove at an overlapped position of an U-shaped hole 10111 of a W shaped fixed part 1011 and the V shaped fixed part 1010 and forms a closed DC cable slot with the waterproof cover 9 (closed slot below the waterproof cover 9 in FIG. 7-1), thus an underside lead-out form is represented. Besides, a lead-out wire 14 can also extend to an adjacent groove at an overlapped position of a fixed part of the photovoltaic building material, and forms a closed DC cable slot with the waterproof cover, thus another upper lead-out form is represented. Both lead-out forms could reduce risk of a fire hazard.

[0088] As showing in FIG. 7-1, FIG. 8-1 and FIG. 8-2, after the plurality of V-shaped fixed parts of the photovoltaic building material 1 are overlapped onto another adjacent transverse W-shaped fixed part 1011 of the photovoltaic building material vertical direction, the top of the V-shaped fixed part and the W-shaped fixed part are covered by the waterproof cover 9. The waterproof cover 9 is overlapped onto the glass plate 11, and a waterproof sealing element 8 is used at the overlapped position. Effects of simple and reliable waterproof, easily assembling and easily replacing, etc., in the present invention are represented by a usage of overlapping in vertical direction of V shaped fixed part 1010 and W shaped fixed part 1011 of the photovoltaic building material 1 and a usage of connection to building 6. After the photovoltaic building material 1 is assembled, only the self-cleaning and anti-slip high hardness ultra-thin transparent glass surface and the waterproof cover 9 are represented on the building outside surface. It significantly improves weather resistance, self-cleaning performance, sealing performance, waterproof performance, smooth flow of rainwater, etc. of photovoltaic building material 1. At the same time, there is no any obstacle at the overlapped position in vertical direction, and a broad water channel from high to low is naturally formed, such that rainwater may flow down smoothly and take dust on the surface of photovoltaic building material 1 away completely.

[0089] As showing in FIG. 1, FIG. 2 and FIG. 3-3, at least one stiffening rib 102 is further set up at an overlapped position of the metal back plate 10 of the photovoltaic building material 1 in the present invention, which may strengthen rigidity of the overlapped position to avoid deformation, and at the same time, an upper photovoltaic building material may be raised in order to make rainwater flow smoothly, and make dust harder to be residual. Wherein a height of the stiffening rib 102 may less than a thickness of the waterproof sealing element 8, which enables both the upper and bottom photovoltaic building materials 1 to overlap smoothly.

[0090] For example, as showing in FIG. 9, after using the photovoltaic building material 1 collocated a micro inverter 5, a traditional color steel tile may be replaced by the photovoltaic building material 1, and a photovoltaic power generation function with the photovoltaic building material 1 will be represented. A direct current with less than a safe DC voltage 48V is generated through a solar cell 12 coupled to a front layer of the photovoltaic building material 1, and the direct current is converted into a 220V or a 380V alternating current by the micro inverter 5 collocated the photovoltaic building material 1, and coupled to an internal power system of the building in order to achieve a power generation function. In addition, a safe low voltage technology is used for the DC circuit of the photovoltaic building material 1. Therefore, a voltage of the photovoltaic building material 1 is always lower than the safety level of 48V.

[0091] In conclusion, at least the function of improving the load-bearing ability for building materials and durability is represented by the metal back plate 10 of the present invention. In addition, the effects of aging resistant, ozone resistance, and chemical resistance are further represented by the sealed plastic film 13 of the present invention. Furthermore, the thermo loading resulted from the shade is further prevented by the present invention, and effects of maintaining stable anti-pollution performance, easily assembling, simple and reliable waterproof, easily assembling and using, easily replacing, smooth flow of rain, etc. are provided by the present invention.

[0092] After the photovoltaic building material 1 of the present invention is assembled, an automatic spraying device used for cleaning roof automatically may be set up on a ridge or on a height. An automatic water spraying device may have a usage of rotative watering on a roof or a usage of punching holes on pipe channel and water jet, directly resulting in a showering effect on the photovoltaic building material 1, and cleaning the area of photovoltaic power generation, improving efficiency of power generation and cooling down roof temperature simultaneously.

[0093] As showing in FIG. 10-1 and FIG. 10-2, a rainwater reclaiming unit or a system of it may be added on the assembling structure of the photovoltaic building material 1 of the present invention in order to realize automatic reclaim of rainwater. A rainwater reclaiming device, a draining ditch 37 for example, is set up at low of roof, after reclaiming, rainwater is centralized at a reservoir 31 situated at a lower position under the roof, and may be pump into a ridge/water pipe 32 at height by a water pump 38 set up in the reservoir 31 in order to provide a water jet to be repeatedly sprayed by an automatic spraying device, and after being collated with a nozzle 33 fixed on a ridge cover plate 34, process water spraying. In this way, a cycle of water spraying, cleaning and cooling down, water reclaiming, and pumping into ridge/water pipe 32 at height is formed. A filtering system 35, which may filter foreign matter of roof in the water body before going into the water pump 38, is in the reservoir 31. If there is no rain for a long time, a public tap-water 36 may be connected with the reservoir 31.

[0094] Electrical control of the water pump 38 may be controlled by an intelligent system, and it may be controlled through a temperature detection of a bottom space of the roof, and may process a programming control which is based on roof temperature, indoor temperature and analogy prediction of power generation and turn on an automatically ridge water spraying system when roof temperature is high or when indoor temperature requires, reducing indoor temperature indirectly and realizing an intelligent control without the need for manual operation.

[0095] Traditional building materials are replaced by an intelligent roof power generation system formed by the automatic spraying device and photovoltaic building material 1, and the BAPV system set up on traditional photovoltaic module roof is also be improved, realizing a real building integrated photovoltaic and an intelligent photovoltaic roof which is intelligent power generating, waterproof, fireproof, load-bearing, durable, and heat insulation.

[0096] An auxiliary device for resisting strong wind of the present invention is shown in FIG. 11-1, FIG. 11-2, FIG. 12 and FIG. 13, a reverse wing device 23 is assembled on an upright column 22 of a main structure 21, and two reverse wing devices 23 may be segmentally connected at bottom edge of the main structure 21. FIG. 12 is a reverse wing device 23 assembling method of a design structure of a new building including the main structure 21 and the upright column 22. As showing in FIG. 13, if a design structure of an old building includes the main structure 21 and the upright beam column 22, it may enable the main structure 21 and the upright column 22 to further extend in order to be assembled with a reverse wing device 23. Similarly, the said auxiliary device may be assembled at the other side of building. Also, the said auxiliary device has a function of roof safety rail to prevent workers from falling during maintenance.

[0097] A partial zoom-in view of a structure shown in FIG. 11-2 is shown in FIG. 12 is an auxiliary device for resisting strong wind of the present invention, a cable tray 24 (for bearing micro Inverter 5 and wires, and avoiding being grilled) may be assembled on the lower side of the main structure 21, and the cable tray 24 is assembled in a protruding way on top of the photovoltaic building material 1 and is in accord with the principle of aerodynamics spoiler. The protruding cable tray 24 under strong wind may increase air resistance, reduce wind velocity, increase pressure on roof, and reduce damage to the photovoltaic building material 1.

[0098] An assembled reverse wing device on a roof for resisting winds of the present invention is shown in FIG. 14, the said device is under a rule of generating a downforce caused by an aerodynamic device with an upside-down wing, and acting the down force on the architecture structure of roof. An uplift force acted on and destroying roof may be formed when a strong wind flows over the roof with a velocity V, but at the same time, when the strong wind flows over the reverse wind device 23, the reverse wind device 23 also acts a down force on the roof structure in order to protect the roof, thereby, a purpose of resisting strong wind for roof building is achieved.

[0099] The formula is “D=½ W H F ρ V.sup.2”, and meanings of the symbols are as below.

[0100] D: downforce, SI unit: newton;

[0101] W: wing span, SI unit: meter;

[0102] H: chord of wing, SI unit: meter;

[0103] F: lift coefficient;

[0104] ρ: air density, SI unit: kg/m.sup.3;

[0105] V: wind velocity, SI unit: m/sec

[0106] As showing in FIG. 15, the auxiliary device for resisting strong wind of the present invention may also be replaced by a wind turbine wall 27 composed of a plurality of wind turbines 26 as shown in FIG. 18 at same position, when a strong wind flows through the wind turbine wall 27, velocity of the strong wind will be incredibly reduced in order to prevent the photovoltaic building material 1 from being destroyed, and at the same time, the wind turbines 26 may bring income by producing wind power. Structure types of the wind turbines 26 may be at least segmented into a structure type of horizontal axis wind turbine as shown in FIG. 16 and a structure type of vertical axis wind turbine as shown in FIG. 17.

[0107] The above describes the preferred embodiments of the present invention. However, not all of the elements or steps are essential technical features, and all details of the technical features may not have been described completely. All units and steps described are provided as examples only, and they may be modified by a person ordinarily skilled in the art of the technical field of this patent application. The scope of the present invention shall be defined by the claims thereof