CN215444292U

CN215444292U - Flexible wind power generation device

Info

Publication number: CN215444292U
Application number: CN202121909344.6U
Authority: CN
Inventors: 张昌松; 陈飞昌; 魏立柱; 王楚; 王世元
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-01-07
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a flexible wind power generation device which comprises a flexible power generation film and a supporting rod, wherein one end of the flexible power generation film is fixed on the supporting rod, the supporting rod is used for supporting the flexible power generation film, the flexible power generation film comprises a PVDF/BTO composite piezoelectric film, a silver electrode layer and a lead, the front surface and the back surface of the PVDF/BTO composite piezoelectric film are respectively provided with the silver electrode layer, the surface of the silver electrode layer is provided with the lead, and the lead is used for conducting charges on the silver electrode layer to form a conducting circuit; the flexible wind power generation device has the advantages of wide region application range, simple structure, low cost, high wind power utilization efficiency and small occupied space.

Description

Flexible wind power generation device

Technical Field

The utility model belongs to the technical field of wind power generation devices, and particularly relates to a flexible wind power generation device utilizing a PVDF/BTO composite piezoelectric film piezoelectric effect.

Background

The existing wind power generation device is generally a fan type power generation device formed by three twisted blades, when wind blows the blades, a rotor is driven to rotate, power is generated by utilizing the electromagnetic induction principle, the wind power utilization effect is not ideal, equipment is large, the structure is complex, the manufacturing cost is high, the installation and the movement are inconvenient, and the application region range is limited.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a flexible wind power generation device, wherein the PVDF/BTO piezoelectric film is excited by wind power to generate a piezoelectric effect generated by deformation, so that the upper surface and the lower surface of the film generate different charges to form voltage, the utilization efficiency of wind power can be improved, and the power generation device is simple and flexible, low in manufacturing cost, convenient to install and move and not limited by regions.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a flexible wind power generation device, includes flexible electricity generation film and branch, and flexible electricity generation film one end is fixed on the branch, the branch is used for supporting flexible electricity generation film, flexible electricity generation film includes PVDF BTO composite piezoelectric film, silver electrode layer and lead wire, PVDF BTO composite piezoelectric film's tow sides all are provided with the silver electrode layer on the surface, silver electrode layer surface is provided with the lead wire, the lead wire is used for conducting the electric charge formation on the silver electrode layer and switches on the circuit.

Furthermore, the thickness of the PVDF/BTO composite piezoelectric film is 30-70 μm.

Further, the thickness of the silver electrode layer is 10 to 30 μm.

Further, the silver electrode structure also comprises a polytetrafluoroethylene protective layer, wherein the polytetrafluoroethylene protective layer is arranged on the surface of the silver electrode layer.

Furthermore, the thickness of the polytetrafluoroethylene protective layer is 20-50 μm.

Furthermore, one end of the polytetrafluoroethylene protective layer is connected with the supporting rod.

Furthermore, the polytetrafluoroethylene protective layer is bonded on the surface of the silver electrode layer and used for protecting the PVDF/BTO composite piezoelectric film.

Further, the silver electrode layers are respectively plated on the front surface and the back surface of the PVDF/BTO composite piezoelectric film.

Further, the lead is welded on the surface of the silver electrode layer.

Furthermore, the welding adopts soldering.

Compared with the prior art, the utility model has at least the following beneficial effects:

the utility model provides a flexible wind power generation device, which is prepared by adopting a PVDF/BTO piezoelectric film, has the advantages of wide region application range, simple structure, low cost, high wind power utilization efficiency and small occupied space, is prepared by the PVDF/BTO piezoelectric film with micron-level thickness, controllable tiling area and overlapping use, and can fully utilize limited space and wind power.

Furthermore, the core component of the flexible wind power generation device adopts PVDF and BTO environment-friendly materials, so that the recovery or reprocessing of the device has no pollution to the environment.

Drawings

FIG. 1 is a front view of a PVDF/BTO composite piezoelectric film wind energy power generation device.

FIG. 2 is a cross-sectional view taken along line I-I of FIG. 1.

FIG. 3 is a circuit diagram of a PVDF/BTO composite piezoelectric thin film.

FIG. 4 is a schematic diagram of the piezoelectric effect of PVDF/BTO composite piezoelectric film.

Fig. 5 is a voltage output diagram of the power generation device in a blowing state.

In the drawings: 1. the piezoelectric ceramic comprises a polytetrafluoroethylene protective layer, 2. a PVDF/BTO composite piezoelectric film, 3. a silver electrode layer, 4. a lead and 5. a support rod.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

As shown in fig. 1 and 2, the present invention provides a flexible wind power generation apparatus, which includes a flexible power generation film and a support rod 5, wherein one end of the flexible power generation film is fixed on the support rod 5, and the support rod 5 is used for supporting the flexible power generation film; the flexible power generation film comprises a polytetrafluoroethylene protective layer 1, a PVDF/BTO composite piezoelectric film 2, a silver electrode layer 3 and a lead 4, wherein:

the PVDF/BTO composite piezoelectric film 2 is prepared by a tape casting method, and raw materials are PVDF N, N-dimethylformamide solution and BTO powder in a mass ratio of 9: 1;

preferably, in the casting process, the PVDF/BTO mixed solution is placed on a casting machine, the thickness of a single-layer casting layer is controlled to be 0.5-1mm, after casting, the membrane is placed in a constant-temperature drying oven (20 ℃) to be dried, after N, N-dimethylformamide is completely volatilized, a PVDF/BTO composite film is prepared, and the PVDF/BTO composite film is subjected to high-temperature stretching and electric field polarization, so that the PVDF/BTO composite piezoelectric film 2 with the thickness of 30-70 mu m is obtained.

The front surface and the back surface of the PVDF/BTO composite piezoelectric film 2 are respectively provided with a silver electrode layer 3 which is used for collecting charges generated on the surface of the PVDF/BTO composite piezoelectric film 2; the surface of the silver electrode layer 3 is provided with a lead 4, and the lead 4 is used for conducting charges on the silver electrode layer 3 to form a conducting circuit; the silver electrode layer 3 is provided with a polytetrafluoroethylene protective layer 1, and one end of the polytetrafluoroethylene protective layer 1 is connected with the supporting rod 5.

Preferably, the polytetrafluoroethylene protective layer 1 is adhered to the surface of the silver electrode layer 3 and used for protecting the PVDF/BTO composite piezoelectric film 2, and the PVDF/BTO composite piezoelectric film 2 is a core for converting wind energy into electric energy;

preferably, the silver electrode layers 3 are plated on the front surface and the back surface of the PVDF/BTO composite piezoelectric film 2;

preferably, the lead 4 is soldered to the surface of the silver electrode layer 3 and soldered thereto.

Preferably, the polytetrafluoroethylene protective layer 1 encapsulates the flexible power generation film, one end of the polytetrafluoroethylene protective layer 1 is connected with the support rod 5, and the support rod 5 plays a supporting role.

When the power generation device is excited by wind energy, the power generation device swings with wind, at the moment, the whole power generation device generates deformation, the PVDF/BTO composite piezoelectric film also generates deformation, different charges are formed on the upper surface and the lower surface of the piezoelectric film based on the piezoelectric effect principle of materials, the silver electrode layer 3 collects the charges on the surface of the PVDF/BTO composite piezoelectric film 2 and then leads out the charges through the lead 4, and a current is formed in an external circuit. The PVDF/BTO composite piezoelectric film wind power generation device is the working principle of the PVDF/BTO composite piezoelectric film wind power generation device.

Preferably, the thickness of the upper and lower polytetrafluoroethylene protective layers 1 is 20-50 μm;

preferably, the thickness of the PVDF/BTO composite piezoelectric film 2 is 30-70 μm;

preferably, the silver electrode layers 3 are plated on the upper surface and the lower surface of the PVDF/BTO composite piezoelectric film, and the thickness is 10-30 micrometers.

The polytetrafluoroethylene protective layer 1 plays a role in protection and is used for protecting the PVDF/BTO composite piezoelectric film 2 of the core device;

fig. 3 is a circuit diagram of a PVDF/BTO composite piezoelectric film, and after being excited by wind, the PVDF/BTO composite piezoelectric film 2 deforms, that is, as shown in fig. 4, heterogeneous charges are generated on the upper and lower surfaces of the PVDF/BTO composite piezoelectric film 2, and the charges are collected by silver electrode layers plated on the upper and lower surfaces of the PVDF/BTO composite piezoelectric film 2, and at this time, the charges are conducted to an external circuit through the flow of a lead 4, so as to form a current.

Testing the power generation performance:

as shown in fig. 5, the power generation device of the present invention is placed under a fan to blow air, and an oscilloscope is used to test the voltage output value of the power generation device of the present invention in the air blowing state, wherein the voltage output value is at most 3.8V, and tens of LED lamps can be completely lighted, and the power generation device of the present invention has great application potential for street lamp lighting or micro-system power supply.

Claims

1. The utility model provides a flexible wind power generation device, its characterized in that, includes flexible electricity generation film and branch (5), and flexible electricity generation film one end is fixed on branch (5), branch (5) are used for supporting flexible electricity generation film, flexible electricity generation film includes compound piezoelectric film (2) of PVDF BTO, silver electrode layer (3) and lead wire (4), all be provided with silver electrode layer (3) on the tow sides surface of compound piezoelectric film (2) of PVDF BTO, silver electrode layer (3) surface is provided with lead wire (4), lead wire (4) are used for conducting the electric charge formation on silver electrode layer (3) and switch on the circuit.

2. The flexible wind energy generation device according to claim 1, characterized in that the thickness of the PVDF/BTO composite piezoelectric film (2) is 30-70 μm.

3. The flexible wind energy generation device according to claim 1, characterized in that the thickness of the silver electrode layer (3) is 10 μm to 30 μm.

4. The flexible wind power generation device according to claim 1, further comprising a polytetrafluoroethylene protective layer (1), wherein the polytetrafluoroethylene protective layer (1) is arranged on the surface of the silver electrode layer (3).

5. A flexible wind-power unit according to claim 4, characterized in that said polytetrafluoroethylene protective layer (1) has a thickness of 20-50 μm.

6. A flexible wind-power unit according to claim 4 characterized in that said Teflon-coated layer (1) is connected to a strut (5) at one end.

7. The flexible wind power generation device according to claim 4, characterized in that the polytetrafluoroethylene protective layer (1) is bonded on the surface of the silver electrode layer (3) for protecting the PVDF/BTO composite piezoelectric film (2).

8. The flexible wind power generation device according to claim 1, wherein the silver electrode layers (3) are respectively plated on the front surface and the back surface of the PVDF/BTO composite piezoelectric film (2).

9. The flexible wind energy generator according to claim 1, wherein said leads (4) are soldered to the surface of the silver electrode layer (3).

10. The flexible wind energy generation device of claim 9, wherein said welding is by soldering.