Wind and rain dual-energy piezoelectric power generation device

Abstract

The invention discloses a wind and rain dual-energy piezoelectric power generation device which comprises a stand column, a wind power transmission device, a piezoelectric power generation module and an energy management system. The stand column is vertically arranged, the wind power transmission device, the piezoelectric power generation module and the energy management system are all arranged on the stand column, the piezoelectric power generation module is horizontally arranged, the wind power transmission device impacts the piezoelectric power generation module through kinetic energy generated by rotation of wind energy in all directions, and electric energy generated by impact of rainfall on the piezoelectric power generation module is converted into electric energy. And the piezoelectric power generation module transmits the generated current to the energy management system for storage. The device is scientific in principle, reasonable in design and compact in structure, the eight wind power transmission devices are arranged around the stand column in different directions, wind energy in all directions is comprehensively captured, and the elastic impact hammer is driven by the transmission assembly to directionally impact the piezoelectric collection module; piezoelectric ceramic plates are arranged on the front and back sides of the piezoelectric collection module, wind power impact is responded to generate power, current can be generated through impact of rainfall and raindrops on the piezoelectric ceramic plates, and wind and rain dual-energy collaborative capture is achieved.

Description

Technical Field

[0001] This invention belongs to the field of new energy utilization technology, specifically relating to a wind and rain dual-energy piezoelectric power generation device suitable for windy and / or rainy areas. Background Technology

[0002] Driven by the global goal of "peak carbon and carbon neutrality," the efficient utilization of clean and renewable energy has become a research hotspot. Wind and rain energy are abundant and pollution-free, while piezoelectric ceramics have the advantages of compact structure and high efficiency in power-to-electricity conversion. They have been applied to small-scale renewable energy power generation, providing technical support for the decentralized utilization of both. Currently, there is research on piezoelectric ceramic power generation driven by wind and rain energy, but each has its limitations. Wind-driven generation often uses energy-harvesting structures such as vortex-induced vibration, which are suitable for small-scale scenarios, but wind energy is highly intermittent and cannot generate electricity stably at low wind speeds, and the energy harvesting bandwidth is narrow and the conversion efficiency is low; traditional piezoelectric ceramics have limited performance, and high-end materials are expensive, making it difficult to apply on a large scale. Rainfall-driven power generation mainly generates electricity through raindrop impact or triboelectric synergistic effect. Although it can achieve high conversion efficiency, the kinetic energy of a single raindrop is small, the power generation is low, it is greatly affected by rainfall conditions, the device is idle when there is no rainfall, the applicable scenarios are limited, and it is difficult to meet the needs of distributed power supply on its own. Existing hybrid power generation systems mostly do not involve the combination of wind and rain energy. A few spliced ​​solutions have not achieved structural and kinetic energy synergy, and have problems such as complex structure and unstable piezoelectric plate stress. They still cannot solve the intermittent nature of single energy power generation, have low device utilization, and are difficult to adapt to small and medium-sized distributed power supply scenarios. Furthermore, existing devices do not consider compatibility, and wind and rain structures interfere with each other, reducing conversion efficiency; moreover, the performance bottleneck of piezoelectric ceramics has not been overcome, making it difficult to balance energy conversion efficiency and cost, thus limiting the promotion of this technology. In summary, current technologies for driving piezoelectric ceramic power generation using wind and rain energy both have limitations. Existing composite solutions fail to achieve efficient synergistic utilization of both technologies, and there is a lack of integrated devices that are compact, have high conversion efficiency, and are highly adaptable. Therefore, developing such devices and overcoming existing technological bottlenecks has become an urgent problem to be solved in this field, and it is also the original intention of this invention. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a compact, highly efficient, and adaptable dual-energy piezoelectric power generation device that can withstand wind and rain.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a wind and rain dual-energy piezoelectric power generation device, including a column 34, a wind power transmission device 13, a piezoelectric power generation module 25, and an energy management system 44; the column 34 is vertically arranged, the wind power transmission device 13, the piezoelectric power generation module 25, and the energy management system 44 are all mounted on the column 34, the piezoelectric power generation module 25 is horizontally arranged, the wind power transmission device 13 uses the kinetic energy of the wind rotation in all directions to impact the piezoelectric power generation module 25, and the rain impacts the piezoelectric power generation module 25 to generate electrical energy, the piezoelectric power generation module 25 transmits the generated current to the energy management system 44 for storage.

[0005] Furthermore, the piezoelectric power generation module 25 has a disc-shaped structure and is fixedly mounted on the column 34 at the same center. The top surface of the piezoelectric power generation module 25 is covered with a whole piezoelectric ceramic plate 35, and the bottom surface of the piezoelectric power generation module 25 is fixedly arranged with four fan-shaped piezoelectric ceramic plates 35 in a circular array. The included angle between the centers of two adjacent piezoelectric ceramic plates 35 on the bottom surface is 90°. Each piezoelectric ceramic plate 35 includes a ceramic sheet 36, and the ceramic sheet 36 is provided with an ABS encapsulation shell 37. The ABS encapsulation shell 37 is provided with a wire interface 18.

[0006] Furthermore, each piezoelectric ceramic plate 35 includes several ceramic sheets 36 connected in series, and the ceramic sheets 36 are of type PZT-5H; the ABS encapsulation shell 37 has an IP68 protection rating, and the top of the ABS encapsulation shell 37 of the single piezoelectric ceramic plate 35 on the top surface adopts a 3mm thick elastic panel, and the bottom of the ABS encapsulation shell 37 of the four piezoelectric ceramic plates 35 on the bottom surface adopts a 3mm thick elastic panel, which ensures effective transmission of wind impact force and can generate electricity by deformation in response to raindrop impact; each piezoelectric power generation module 25 supplies power to the energy management system 44 through the wire interface 18 and the charging cable 55.

[0007] Furthermore, there are eight wind power transmission devices 13, four of which are located above the piezoelectric power generation module 25 and the other four are located below the piezoelectric power generation module 25. The four lower wind power transmission devices 13 correspond one-to-one with the four piezoelectric ceramic plates 35 on the bottom surface of the piezoelectric power generation module 25. The included angle between the center of any wind power transmission device 13 above the piezoelectric power generation module 25 and the two adjacent wind power transmission devices 13 below is 45°. The eight wind power transmission devices 13 have the same structure. Each wind power transmission device 13 above the piezoelectric power generation module 25 includes a fixed frame 33 fixedly connected to the column 34. A cantilever shaft 30 perpendicular to the column 34 is rotatably connected to the fixed frame 33. A turntable 28 and a fan blade 29 are fixedly mounted on the cantilever shaft 30. The turntable 28 is located between the fixed frame 33 and the fan blade 29. A drive column 32 is fixedly mounted on the turntable 28 at an eccentric position on the side near the fixed frame 33. The fixed frame 33 has two guide sleeves 27 corresponding to each other, with the upper guide sleeve 27 being higher than the turntable 28. At the highest point of the turntable 28, the lower guide sleeve 27 is lower than the lowest point of the turntable 28. An impact rod 31 parallel to the column 34 is slidably installed inside the two guide sleeves 27. A plate 45 is fixedly installed at the lower end of the impact rod 31. Several elastic hammers 26 for impacting the piezoelectric ceramic plate 35 are fixedly installed on the bottom surface of the plate 45. A horizontally set crossbar 46 is fixedly installed on the impact rod 31. A transverse drive hole 47 is opened in the crossbar 46. The drive column 32 extends into the transverse drive hole 47. A bearing roller that is rollably connected to the upper and lower side walls of the transverse drive hole 47 is installed on the drive column 32.

[0008] Furthermore, the energy management system 44 includes a waterproof box 48 mounted on the column 34. The waterproof box 48 contains an energy switch 49, a lithium battery 50, a supercapacitor 51, an intelligent charge / discharge controller 52, a main control unit chip 53, and communication components. The waterproof box 48 has a door 54 on the front and a wiring hole at the bottom. The piezoelectric power generation modules 25 are all connected to the MPPT module port in the intelligent charge / discharge controller 52 through charging cables 55. The DC-DC step-down module in the intelligent charge / discharge controller 52 is connected to the supercapacitor 51 and the lithium battery 50 respectively. The load output module of the intelligent charge / discharge controller is connected to the load through a power supply cable. The lithium battery 50 is a 12V / 50-100Ah lithium iron phosphate battery pack, responsible for long-term stable energy storage.

[0009] Furthermore, the intelligent charge and discharge controller incorporates a piezoelectric energy regulation algorithm to intelligently match the dual-energy output characteristics of the piezoelectric power generation module 25 under wind and rain; the intelligent charge and discharge controller 42 integrates a multi-channel rectifier module and a DC-DC step-down module to output a stable 12V DC power; the supercapacitor 51 and the lithium battery 50 are connected in parallel, and the excess energy of the supercapacitor 51 after it is fully charged is transferred to the lithium battery 50 for storage, and the two work together to supply power when the load power exceeds the real-time power generation; the energy management system has multiple protection functions such as overcharge, over-discharge, short circuit, lightning strike, and reverse connection protection, and the waterproof box 48 has an IP65 protection rating, which is suitable for extreme outdoor environments such as slopes.

[0010] By adopting the above technical solution, compared with the prior art, the various components of the present invention have the following beneficial effects: (1) Wind power transmission device: wind energy capture and power transmission unit The wind power transmission device is the core component for omnidirectional wind energy capture and power transmission. In the field, one column can be set up every 10m, and the distance between adjacent modules is ≥8m to avoid mutual interference of airflow.

[0011] The column is made of 304 stainless steel and is buried ≥50cm into the slope soil at the bottom. It is fixed with C30 concrete and serves as the installation base for 8 sets of wind power transmission devices. The 8 sets of wind power transmission devices are evenly installed around the upper part of the column in a 360° direction, with an angle of 45° between adjacent transmission units to achieve omnidirectional wind energy capture.

[0012] Fan blades: Since the cantilever is set on the cantilever shaft, it is made of carbon fiber composite material. The fan blades are streamlined with rounded edges to reduce wind resistance and improve wind energy capture efficiency. The three fan blades are evenly distributed at 120° on the cantilever end of the cantilever shaft.

[0013] Cantilever pivot: Made of chrome-plated 45# steel, it is rotatably connected to the fixed frame and used to install and fix the fan blades and turntable.

[0014] Turntable: Made of aluminum alloy, with a drive column on the outside. The drive column converts the rotation of the turntable into the vertical linear reciprocating motion of the impact rod through the horizontal drive hole on the crossbar. Two guide sleeves limit the impact rod to reciprocating up and down, providing good guidance.

[0015] The flat plate configuration allows for an increase in the number of elastic hammers, thereby increasing the impact area on the piezoelectric ceramic plate and improving power generation efficiency. The elastic hammers are made of polyurethane, which has excellent elasticity and prevents damage to the piezoelectric ceramic plate. Working principle of wind power transmission device: Airflow in any direction can drive the corresponding fan blades to rotate. The fan blades drive the turntable to rotate synchronously through the cantilever shaft. The turntable moves in the transverse drive hole through the drive column, driving the crossbar and impact bar to move up and down reciprocally. The elastic hammer forms a continuous and directional impact force on the piezoelectric ceramic plate, providing a stable mechanical excitation for the piezoelectric power generation module.

[0016] (2) Piezoelectric power generation module: wind and rain dual-energy capture power generation unit The piezoelectric power generation module is equipped with eight sets of elastic hammers corresponding to the eight sets of wind turbines, arranged in a ring around the column. The module has an upper and lower structure. The top surface of the piezoelectric power generation module is fully covered with a single piece of piezoelectric ceramic plate, maximizing the contact area with rainwater and improving power generation efficiency during rainfall. The bottom surface has four piezoelectric ceramic plates, corresponding to four sets of wind turbines, which reduces costs. The piezoelectric ceramic plate specifically includes a ceramic sheet, an ABS encapsulation shell, and a wire interface. Ceramic sheet: PZT-5H type piezoelectric ceramic sheet is used, and several sheets are connected in series to form a group; the ceramic sheet is tightly bonded to the energy-concentrating back plate with epoxy adhesive. The energy-concentrating back plate is made of high-elasticity stainless steel with a thickness of 2mm to ensure that it can produce uniform deformation when impacted by raindrops or wind, so that the ceramic sheet can be subjected to force synchronously. ABS encapsulation shell: IP68 protection rating, the stress surface uses a 3mm thick elastic panel with a roughened surface to enhance the energy capture efficiency when raindrops hit; the interior of the ABS encapsulation shell is filled with flexible epoxy resin potting compound, which completely encapsulates the ceramic sheet and internal circuitry, achieving waterproof, shockproof and corrosion-resistant protection; Cable interface: Uses aviation plug (IP68 waterproof), located on the side of the housing, compatible with the "piezoelectric input" interface of the energy management system. The cable is a twisted pair shielded cable, resistant to electromagnetic interference. The cable length is adapted to the distance from the module to the foot of the energy management system (1-2m redundancy can be reserved).

[0017] Working principle of piezoelectric harvesting module: Wind power generation: The elastic hammer impacts the elastic panel of the piezoelectric power generation module at a certain frequency. The impact force is transmitted to the energy-concentrating back plate through the ceramic sheet. The deformation of the ceramic sheet generates polarized charges, forming pulsed alternating current. Rainwater power generation: When it rains, raindrops hit the elastic panel on the top surface of the piezoelectric power generation module. The kinetic energy of the raindrops is converted into mechanical deformation of the elastic panel, which drives the ceramic sheet to deform synchronously and generate electricity. Tests have shown that it can stably output electrical energy when the raindrop diameter is ≥2mm and the rainfall intensity is ≥5mm / h. Wind and rain synergy: In the event of wind and rain, the force of the wind and the impact of the rain can simultaneously act on the piezoelectric power generation module, and the combined electrical energy is output to the energy management system. (3) Energy Management System: The core unit for intelligent control, it is the core of the entire plant's control and energy distribution, and is fixed on the column. Stainless steel waterproof box: 40cm×30cm×20cm, IP65 protection rating, internal layout divided into functional areas (main control area, conversion area, energy storage area), with reserved ventilation holes and waterproof wiring holes, and the box body is tilted outward at 5° to prevent water accumulation inside.

[0018] Intelligent charge and discharge controller: It integrates a multi-channel rectifier module and a DC-DC step-down module to convert the AC power output from the piezoelectric generator module into a stable 12V DC power. It supports the parallel connection of multiple piezoelectric generator modules and has an output current of ≥5A to meet the power supply requirements of the system load.

[0019] Composite energy storage unit: The lithium battery is a 12V / 50-100Ah square aluminum-shell lithium iron phosphate battery pack with a cycle life of ≥2000 cycles and a self-discharge rate of ≤3% / month at room temperature, responsible for long-term stable energy storage; the supercapacitor is a 10.8V / 100F (4 series and 4 parallel combination) with a response time of ≤1ms, responsible for instantaneous high-power supply and piezoelectric energy buffering; the two are connected in parallel, and the excess electrical energy after the supercapacitor is fully charged is transferred to the lithium battery for storage. When the load power exceeds the real-time power generation, the two work together to supply power.

[0020] Main control unit chip: adopts STM32L476 low-power microcontroller with computing power ≥200DMIPS, runs piezoelectric energy regulation algorithm, intelligently matches the output characteristics of piezoelectric power generation module, and realizes efficient power distribution; communication component has built-in NB-IoT / GPRS module, supports remote data upload and parameter adjustment, and is suitable for unattended operation scenarios.

[0021] Safety protection features: Built-in 1A self-resetting fuse (piezoelectric input), TVS surge protector (36V) and reverse connection protection diode to avoid faults such as short circuit, lightning strike, and reverse connection; waterproof box and internal heat dissipation design, suitable for outdoor environments with rain, dust and large temperature difference.

[0022] The power supply chain achieves a closed-loop system: the input link is piezoelectric generator module → aviation connector → intelligent charge / discharge controller; the energy storage link is intelligent charge / discharge controller → supercapacitor / lithium battery; the output link is intelligent charge / discharge controller → power cable → load. Under extreme weather conditions, during periods of continuous calm and rain-free weather, the system switches to a low-power mode, and the lithium battery can sustain sensor operation for ≥20 days.

[0023] An energy supply mode that uses wind and / or rainfall to generate electricity by impacting piezoelectric ceramic plates, combined with a composite energy storage structure of lithium batteries and supercapacitors, achieves synergy between instantaneous high-power power supply and long-term stable energy storage, significantly reducing maintenance costs and carbon emissions.

[0024] In summary, this invention is scientifically sound, rationally designed, and compactly structured. Eight sets of wind-powered transmission devices are arranged around the column in different directions to comprehensively capture wind energy from all directions. The transmission components drive an elastic impact hammer to directionally impact the piezoelectric collection module. The piezoelectric collection module has piezoelectric ceramic plates on both sides, which not only generate electricity in response to wind impacts but also generate current through raindrop impacts, achieving coordinated capture of both wind and rain energy. This invention is suitable for windy and rainy areas or slope ecological restoration scenarios with high soil sand content, providing electrical energy for slope ecological restoration. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of a set of wind power transmission devices in this invention; Figure 3 yes Figure 2 The left view; Figure 4 This is a schematic diagram showing the connection between the fixed frame and the cantilever shaft; Figure 5 This is a schematic diagram of the wind power transmission device in this invention when it reaches its lower limit. Figure 6 This is a schematic diagram of the wind power transmission device in this invention when it reaches its upper limit. Figure 7 This is a schematic diagram of the internal structure of the ceramic piezoelectric plate and the energy management module in this invention; Figure 8 yes Figure 1 A schematic diagram of the structure of a medium-voltage electric power generation module from below; Figure 9 yes Figure 8 A schematic diagram of the structure of a ceramic piezoelectric plate. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] like Figures 1-9 As shown, the wind and rain dual-energy piezoelectric power generation device of the present invention includes a column 34, a wind power transmission device 13, a piezoelectric power generation module 25, and an energy management system 44. The column 34 is vertically arranged, and the wind power transmission device 13, the piezoelectric power generation module 25, and the energy management system 44 are all mounted on the column 34. The piezoelectric power generation module 25 is horizontally arranged. The wind power transmission device 13 uses the kinetic energy of the wind rotation in all directions to impact the piezoelectric power generation module 25. The electrical energy generated by the impact of rain on the piezoelectric power generation module 25 is transmitted by the piezoelectric power generation module 25 to the energy management system 44 for storage.

[0028] The piezoelectric power generation module 25 has a disc-shaped structure and is fixedly mounted on the column 34 with the same center. The top surface of the piezoelectric power generation module 25 is covered with a whole piezoelectric ceramic plate 35, and the bottom surface of the piezoelectric power generation module 25 is fixedly arranged with four fan-shaped piezoelectric ceramic plates 35 in a circumferential array. The included angle between the centers of two adjacent piezoelectric ceramic plates 35 on the bottom surface is 90°. Each piezoelectric ceramic plate 35 includes a ceramic sheet 36, and the ceramic sheet 36 is provided with an ABS encapsulation shell 37. The ABS encapsulation shell 37 is provided with a wire interface 18.

[0029] Each piezoelectric ceramic plate 35 includes several ceramic sheets 36 connected in series. The ceramic sheets 36 are of type PZT-5H. The ABS encapsulation shell 37 has an IP68 protection rating. The top of the ABS encapsulation shell 37 of the single piezoelectric ceramic plate 35 on the top surface uses a 3mm thick elastic panel, and the bottom of the ABS encapsulation shell 37 of the four piezoelectric ceramic plates 35 on the bottom surface uses a 3mm thick elastic panel. This ensures effective transmission of wind impact force and can generate electricity by deformation in response to raindrop impact. Each piezoelectric power generation module 25 supplies power to the energy management system 44 through the wire interface 18 and the charging cable 55.

[0030] There are eight wind power transmission devices 13, four of which are located above the piezoelectric power generation module 25 and the other four are located below the piezoelectric power generation module 25. The four wind power transmission devices 13 at the bottom correspond one-to-one with the four piezoelectric ceramic plates 35 on the bottom surface of the piezoelectric power generation module 25. The included angle between the center of any wind power transmission device 13 above the piezoelectric power generation module 25 and the two adjacent wind power transmission devices 13 below is 45°. The eight wind power transmission devices 13 have the same structure. Each wind power transmission device 13 above the piezoelectric power generation module 25 includes a fixed frame 33 fixedly connected to the column 34. A cantilever shaft 30 perpendicular to the column 34 is rotatably connected to the fixed frame 33. A turntable 28 and a fan blade 29 are fixedly mounted on the cantilever shaft 30. The turntable 28 is located between the fixed frame 33 and the fan blade 29. A drive column 32 is fixedly mounted on the turntable 28 at an eccentric position on the side near the fixed frame 33. The fixed frame 33 has two guide sleeves 27 corresponding to each other, with the upper guide sleeve 27 being higher than the turntable 28. At the highest point of the turntable 28, the lower guide sleeve 27 is lower than the lowest point of the turntable 28. An impact rod 31 parallel to the column 34 is slidably installed inside the two guide sleeves 27. A plate 45 is fixedly installed at the lower end of the impact rod 31. Several elastic hammers 26 for impacting the piezoelectric ceramic plate 35 are fixedly installed on the bottom surface of the plate 45. A horizontally set crossbar 46 is fixedly installed on the impact rod 31. A transverse drive hole 47 is opened in the crossbar 46. The drive column 32 extends into the transverse drive hole 47. A bearing roller that is rollably connected to the upper and lower side walls of the transverse drive hole 47 is installed on the drive column 32.

[0031] The energy management system 44 includes a waterproof box 48 mounted on a column 34. Inside the waterproof box 48 are an energy switch 49, a lithium battery 50, a supercapacitor 51, an intelligent charge / discharge controller 52, a main control unit chip 53, and communication components. The waterproof box 48 has a door 54 on the front and a wiring hole on the bottom. The piezoelectric power generation modules 25 are all connected to the MPPT module port in the intelligent charge / discharge controller 52 through charging cables 55. The DC-DC step-down module in the intelligent charge / discharge controller 52 is connected to the supercapacitor 51 and the lithium battery 50 respectively. The load output module of the intelligent charge / discharge controller is connected to the load through a power supply cable. The lithium battery 50 is a 12V / 50-100Ah lithium iron phosphate battery pack, responsible for long-term stable energy storage.

[0032] The intelligent charge and discharge controller has a built-in piezoelectric energy regulation algorithm to intelligently match the dual-energy output characteristics of the piezoelectric power generation module 25 under wind and rain. The intelligent charge and discharge controller 42 integrates a multi-channel rectifier module and a DC-DC step-down module to output a stable 12V DC power. The supercapacitor 51 and the lithium battery 50 are connected in parallel. When the supercapacitor 51 is fully charged, the excess energy is transferred to the lithium battery 50 for storage. When the load power exceeds the real-time power generation, the two work together to provide power. The energy management system has multiple protection functions such as overcharge, over-discharge, short circuit, lightning strike, and reverse connection protection. The waterproof box 48 has an IP65 protection rating and is suitable for extreme outdoor environments such as slopes.

[0033] The working process of this invention is as follows: Wind power generation: The cantilever shafts 30 of the eight wind power transmission devices 13 are oriented clockwise as follows: due east, southeast, due south, southwest, due west, northwest, due north, and northeast, so that the wind-facing fan blades 29 can be blown regardless of the wind direction.

[0034] Taking the wind power transmission device 13 at the top as an example, the specific power generation process is as follows: the four fan blades 29 rotate, driving the cantilever shaft 30 and the turntable 28 to rotate. During the rotation of the turntable 28, the drive column 32 on the turntable 28 slides in the crossbar drive hole 47, and at the same time drives the impact rod 31 to move up and down in the two guide sleeves 27. Several elastic hammers 26 on the bottom surface of the plate 45 at the lower end of the impact rod 31 impact the elastic panel on the top surface of the piezoelectric power generation module 25 at a certain frequency. The impact force is transmitted to the ceramic plate 36 through the energy-concentrating back plate. The ceramic plate deforms and generates polarized charges, forming pulsed alternating current. The pulsed alternating current is transmitted to the intelligent charge and discharge controller 52 of the energy management system 44 through the charging cable 55. The intelligent charge and discharge controller 52 has a built-in rectifier and filter component to convert it into stable direct current and deliver it to the supercapacitor 51 and the lithium battery 50. The supercapacitor 51 and the lithium battery 50 are connected in parallel. After the supercapacitor 51 is fully charged, the excess electrical energy is transferred to the lithium battery 50 for storage.

[0035] The difference between the working process of the lower wind power transmission device 13 and the upper wind power transmission device 13 is that the elastic hammer 26 of the lower wind power transmission device 13 impacts the elastic panel on the bottom surface of the piezoelectric power generation module 25 at a certain frequency.

[0036] Rainwater power generation: When it rains, raindrops hit the elastic panel on the top surface of the piezoelectric power generation module 25. The kinetic energy of the raindrops is converted into the mechanical deformation of the elastic panel, which drives the ceramic sheet 36 to deform synchronously and generate electricity. Tests show that it can stably output electrical energy when the raindrop diameter is ≥2mm and the rainfall intensity is ≥5mm / h. Synergistic effect of wind and rain: In the event of wind and rain, the force of wind and the impact of rain can act on the piezoelectric power generation module at the same time, and the superimposed electrical energy is output to the energy management system 44.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A wind and rain dual-energy piezoelectric power generation device, characterized in that: It includes a column (34), a wind power transmission device (13), a piezoelectric power generation module (25), and an energy management system (44); the column (34) is set vertically, the wind power transmission device (13), the piezoelectric power generation module (25) and the energy management system (44) are all set on the column (34), the piezoelectric power generation module (25) is set horizontally, the wind power transmission device (13) uses the kinetic energy of the wind energy rotation in all directions to impact the piezoelectric power generation module (25), the rain impacts the piezoelectric power generation module (25) to generate electrical energy, and the piezoelectric power generation module (25) transmits the generated current to the energy management system (44) for storage.

2. The wind and rain dual-energy piezoelectric power generation device according to claim 1, characterized in that: The piezoelectric power generation module (25) has a disc-shaped structure. The piezoelectric power generation module (25) is fixedly mounted on the column (34) with the same center. The top surface of the piezoelectric power generation module (25) is covered with a whole piezoelectric ceramic plate (35). The bottom surface of the piezoelectric power generation module (25) is fixedly arranged with four fan-shaped piezoelectric ceramic plates (35) arranged in a circular array. The included angle between the centers of two adjacent piezoelectric ceramic plates (35) on the bottom surface is 90°. Each piezoelectric ceramic plate (35) includes a ceramic sheet (36). The ceramic sheet (36) is provided with an ABS encapsulation shell (37). The ABS encapsulation shell (37) is provided with a wire interface (18).

3. The wind and rain dual-energy piezoelectric power generation device according to claim 2, characterized in that: Each piezoelectric ceramic plate (35) includes several ceramic plates (36) connected in series. The ceramic plates (36) are of type PZT-5H. The ABS encapsulation shell (37) has an IP68 protection rating. The top of the ABS encapsulation shell (37) of the top piezoelectric ceramic plate (35) is made of a 3mm thick elastic panel. The bottom of the ABS encapsulation shell (37) of the bottom four piezoelectric ceramic plates (35) is made of a 3mm thick elastic panel. This ensures that the wind impact force is effectively transmitted and that the deformation generates electricity in response to the impact of raindrops. Each piezoelectric power generation module (25) supplies power to the energy management system (44) through the wire interface (18) and the charging cable (55).

4. The wind and rain dual-energy piezoelectric power generation device according to claim 3, characterized in that: There are eight wind power transmission devices (13), four of which are located above the piezoelectric power generation module (25) and the other four are located below the piezoelectric power generation module (25). The four wind power transmission devices (13) at the bottom correspond one-to-one with the four piezoelectric ceramic plates (35) on the bottom surface of the piezoelectric power generation module (25). The center angle between any wind power transmission device (13) above the piezoelectric power generation module (25) and the two adjacent wind power transmission devices (13) below is 45°. The eight wind power transmission devices (13) have the same structure. Each wind power transmission device (13) above the piezoelectric power generation module (25) includes a fixed frame (33) fixedly connected to the column (34). A cantilever shaft (30) perpendicular to the column (34) is rotatably connected to the fixed frame (33). A turntable (28) and a fan blade (29) are fixedly mounted on the cantilever shaft (30). The turntable (28) is located between the fixed frame (33) and the fan blade (29). A drive column (32) is fixedly mounted on the turntable (28) at an eccentric position on the side near the fixed frame (33). Two guide sleeves (27) are provided on the fixed frame (33) with corresponding upper and lower parts. The upper guide sleeve (27) is higher than the lower guide sleeve. At the highest point of the turntable (28), the lower guide sleeve (27) is lower than the lowest point of the turntable (28). An impact rod (31) parallel to the column (34) is slidably provided in the two guide sleeves (27). A plate (45) is fixedly provided at the lower end of the impact rod (31). Several elastic hammers (26) for impacting the piezoelectric ceramic plate (35) are fixedly provided on the bottom surface of the plate (45). A horizontally set crossbar (46) is fixedly provided on the impact rod (31). A transverse drive hole (47) is opened in the crossbar (46). The drive column (32) extends into the transverse drive hole (47). A bearing roller that is slidably connected to the upper and lower side walls of the transverse drive hole (47) is installed on the drive column (32).

5. The wind and rain dual-energy piezoelectric power generation device according to claim 4, characterized in that: The energy management system (44) includes a waterproof box (48) installed on a column (34). The waterproof box (48) contains an energy switch (49), a lithium battery (50), a supercapacitor (51), an intelligent charge and discharge controller (52), a main control unit chip (53), and communication components. The waterproof box (48) has a door (54) on the front side and a wire hole at the bottom. The piezoelectric power generation modules (25) are all connected to the MPPT module port in the intelligent charge and discharge controller (52) through the charging cable (55). The DC-DC step-down module in the intelligent charge and discharge controller (52) is connected to the supercapacitor (51) and the lithium battery (50) respectively. The load output module of the intelligent charge and discharge controller is connected to the load through the power supply cable. The lithium battery (50) is a 12V / 50-100Ah lithium iron phosphate battery pack, which is responsible for long-term stable energy storage.

6. The wind and rain dual-energy piezoelectric power generation device according to claim 5, characterized in that: The intelligent charge and discharge controller has a built-in piezoelectric energy regulation algorithm to intelligently match the dual-energy output characteristics of the piezoelectric power generation module (25) under wind and rain; the intelligent charge and discharge controller (42) integrates a multi-channel rectifier module and a DC-DC step-down module to output a stable 12V DC power; the supercapacitor (51) and the lithium battery (50) are connected in parallel, and the excess power of the supercapacitor (51) after it is fully charged is transferred to the lithium battery (50) for storage. When the load power exceeds the real-time power generation, the two work together to supply power; the energy management system has multiple protection functions such as overcharge, over-discharge, short circuit, lightning strike, and reverse connection protection. The waterproof box (48) has an IP65 protection level, which is suitable for extreme outdoor environments on slopes.

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