CN109889093B - Electric energy conversion device - Google Patents

Abstract

The invention provides an electric energy conversion device, which is used for converting wind energy or raindrop energy into electric energy to supply power to a load through a piezoelectric sensing module, a charger module is used for storing redundant electric energy into a storage battery module to realize the conversion of the wind energy or raindrop energy and the electric energy, in the piezoelectric sensing module, when a second piezoelectric crystal plate or a third piezoelectric crystal plate is pressed, a gear transmission assembly is started to control a piezoelectric crystal assembly to swing leftwards or rightwards, when one side of a double-sided piezoelectric crystal plate opposite to or opposite to the first piezoelectric crystal plate is pressed, a hydraulic cylinder is started to control the piezoelectric crystal assembly to rotate around a rotating shaft, and the position and the angle of the piezoelectric crystal assembly are controlled to adjust, so that the utilization rate of the wind energy or the raindrop energy is increased.

Description

Electric energy conversion device

technical field

The invention relates to the field of electric energy conversion, in particular to an electric energy conversion device.

Background technique

When some dielectrics are deformed by an external force in a certain direction, polarization will be generated inside, and positive and negative opposite charges will appear on its two opposite surfaces. When the external force is removed, it will return to an uncharged state, a phenomenon called the positive piezoelectric effect. In coastal areas, the wind speed is often between 5-8 grades, sometimes higher. It can be concluded from the formula that when the natural wind is 5-8 grades, the wind pressure is 40-270Pa, and the pressure sensor can measure the force up to 10 ⁴ KN. The pressure sensor uses a diaphragm-type elastic element, and the wind pressure can be converted into a force through the pressure-bearing area of the diaphragm. There is a boss in the middle of the diaphragm, and a piezoelectric sheet is placed behind the boss. The force acts on the piezoelectric sheet through the boss. Make it generate the corresponding amount of charge, and connect it with a charge amplifier. Both the natural wind and the speed of the car belong to the sudden change, so the leakage of electric charge is less, that is, the wind energy or raindrop energy is converted into electric energy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an electric energy conversion device, which can convert wind energy and rain potential energy into electric energy, and the utilization rate of wind energy or raindrop energy is high.

In order to achieve the above object, the present invention provides an electric energy conversion device, comprising a piezoelectric sensing module, a charger module, a battery module and a load, and the piezoelectric sensing module is used for converting wind energy or raindrop energy into electric energy for supplying power to the load, and the charger module is used to store excess electrical energy into the battery module;

The piezoelectric sensing module includes a bracket, a gear transmission assembly, a hydraulic cylinder and a piezoelectric crystal assembly, the bracket is arranged on the gear transmission assembly, and the piezoelectric crystal assembly includes a first piezoelectric crystal plate, a second piezoelectric crystal plate, and a second piezoelectric crystal plate. The piezoelectric crystal plate, the third piezoelectric crystal plate and the double-sided piezoelectric crystal plate, the first piezoelectric crystal plate and the double-sided piezoelectric crystal plate are all sleeved on a rotating shaft and are always vertically arranged, so The rotating shaft is rotatably arranged on the bracket, the second piezoelectric crystal plate and the third piezoelectric crystal plate are arranged on both sides of the first piezoelectric crystal plate, and the piston of the hydraulic cylinder is connected to the Double-sided piezoelectric crystal plate connection;

When the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is activated to control the piezoelectric crystal assembly to swing left or right, and when the double-sided piezoelectric crystal plate is pressed When the opposite side or the opposite side of the crystal plate and the first piezoelectric crystal plate is pressed, the hydraulic cylinder is activated to control the piezoelectric crystal assembly to rotate around the rotating shaft.

Optionally, the gear transmission assembly includes a motor, a first gear and a second gear, the motor is connected with the first gear to drive the first gear to rotate, the first gear and the second gear The bracket is arranged on the second gear, and when the first gear drives the second gear to rotate, the bracket drives the piezoelectric crystal assembly to swing left or right.

Optionally, when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the motor is turned on, and the rotation direction of the motor is the same as that of the second piezoelectric crystal plate when the second piezoelectric crystal plate is pressed. When the third piezoelectric crystal plate is compressed, the motor rotates in opposite directions; when neither the second piezoelectric crystal plate nor the third piezoelectric crystal plate is under pressure, the motor is turned off.

Optionally, when the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate is pressed, the piston of the hydraulic cylinder is elongated to make the piezoelectric crystal assembly go around the rotation axis Turning counterclockwise, when the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate is compressed, the piston of the hydraulic cylinder retracts so that the piezoelectric crystal assembly wraps around the The shaft turns clockwise.

Optionally, the output voltage of the first piezoelectric crystal plate is:

Wherein, _Ca is the capacitance of the first piezoelectric crystal plate, ka is _a constant related to the piezoelectric crystal of the first piezoelectric crystal plate, and A _a is the force acting on the first piezoelectric crystal plate The area of the piezoelectric crystal slice, θ is the inclination angle between the action line of the first piezoelectric crystal plate and the first piezoelectric crystal plate, and W ₀ is the wind pressure or rain pressure.

Optionally, the output voltages of the opposite side or the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate are respectively:

Wherein, C _b is the capacitance of the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate, and C _c is the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate. The capacitance of the piezoelectric crystal on the opposite side of the transistor plate, k _b is the constant related to the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate, and k _c is A constant related to the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate, A _b is the force acting on the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate The area of the slice of the piezoelectric crystal on the opposite side of the piezoelectric crystal plate, A _c is the force acting on the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate. The area of the slice.

Optionally, the electrical energy conversion device is provided on a vehicle.

In the electric energy conversion device provided by the present invention, the piezoelectric sensing module is used to convert wind energy or raindrop energy into electric energy to supply power to the load, and the charger module is used to store excess electric energy into the battery module to realize wind energy or The conversion of raindrop energy and electrical energy, and in the piezoelectric sensing module, when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is activated to control the piezoelectric crystal assembly to the left or right Swing, when the opposite side or the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate is pressed, the hydraulic cylinder is activated to control the piezoelectric crystal assembly to rotate around the rotating shaft , By controlling the piezoelectric crystal component to adjust the position and angle, the utilization rate of wind energy or raindrop energy is increased.

Description of drawings

FIG. 1 is a schematic structural diagram of a power conversion device provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a piezoelectric sensing module provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the piezoelectric crystal on the front side of the double-sided piezoelectric crystal plate provided by an embodiment of the present invention when it is stressed;

FIG. 4 is a schematic structural diagram of the piezoelectric crystal assembly in FIG. 3 after rotating counterclockwise according to an embodiment of the present invention;

5 is a schematic structural diagram of the piezoelectric crystal on the reverse side of the double-sided piezoelectric crystal plate provided by an embodiment of the present invention when it is stressed;

FIG. 6 is a schematic structural diagram of the piezoelectric crystal assembly in FIG. 5 after being rotated clockwise according to an embodiment of the present invention;

Among them, the reference numerals are:

1-piezoelectric sensing module; 11-bracket; 12-first gear; 13-second gear; 14-rotating shaft; 15-hydraulic cylinder; 16-first piezoelectric crystal plate; 17-double-sided piezoelectric crystal plate ; 18- the second piezoelectric crystal plate; 19- the third piezoelectric crystal plate; 2- charger module; 3- battery module;

Detailed ways

The specific embodiments of the present invention will be described in more detail below with reference to the schematic diagrams. The advantages and features of the present invention will become apparent from the following description and claims. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

As shown in FIG. 1 , this embodiment provides a power conversion device, including a piezoelectric sensing module 1 , a charger module 2 , a battery module 3 and a load. The piezoelectric sensing module 1 is used to convert wind energy or raindrops It can be converted into electrical energy to supply power for the load, and the charger module 2 is used to store the excess electrical energy into the battery module 3 . Specifically, raindrops or wind energy are exerted on the piezoelectric sensing module 1 to generate force, which is converted into electrical energy output by the piezoelectric sensing module 1. When it rains heavily, when the wind blows, the piezoelectric sensing module 1 generates electricity, and the piezoelectric sensing module 1 generates electricity. The generated electricity supplies power to the load through the blocking diode, and at the same time stores the excess electrical energy into the battery module 3 through the charger module 2. The blocking diode plays a unidirectional conduction role in the circuit, preventing the piezoelectric sensing module 1 When the generated voltage is lower than the DC bus voltage of the power supply, the battery module 3 reversely sends electricity to the piezoelectric sensing module 1 . The charger module 2 realizes an optimized charging characteristic curve through microcomputer control technology, and the charging current automatically decreases with the increase of the charging voltage of the battery module 3. Combined with the pulse charging method at the end of charging, the charging effect is more ideal. The capacity balance principle is used to intelligently judge the sufficiency of the battery module 3 to ensure that the battery module 3 is sufficient - that is, neither undercharge nor overcharge. The charging also has the function of dynamic tracking and adjustment of charging parameters and a perfect protection function. The voltage stabilizer automatically adjusts the coil turns ratio to keep the output voltage stable. The load can be a DC load or an AC load. When there is an AC load, an inverter can be added to the circuit to convert the DC voltage into an AC voltage for power supply.

Further, as shown in FIG. 2 , the piezoelectric sensing module 1 includes a bracket 11 , a gear transmission assembly, a hydraulic cylinder 15 and a piezoelectric crystal assembly, and the gear transmission assembly includes a motor, a first gear 12 and a second gear 13 , the motor is connected with the first gear 12 to drive the first gear 12 to rotate, the first gear 12 meshes with the second gear 13 , and the bracket 11 is arranged on the second gear 13 .

The piezoelectric crystal assembly includes a first piezoelectric crystal plate 16 , a second piezoelectric crystal plate 18 , a third piezoelectric crystal plate 19 and a double-sided piezoelectric crystal plate 17 . The double-sided piezoelectric crystal plates 17 are all sleeved on a rotating shaft 14 and are always vertically arranged. 18 and the third piezoelectric crystal plate 19 are symmetrically arranged on both sides of the first piezoelectric crystal plate 16, the piston of the hydraulic cylinder 15 is connected to the double-sided piezoelectric crystal plate 17, the first piezoelectric crystal plate 17 The relative positions of the piezoelectric crystal plate 16 , the second piezoelectric crystal plate 18 , the third piezoelectric crystal plate 19 and the double-sided piezoelectric crystal plate 17 are always kept constant.

Usually, the direction of the force felt by the piezoelectric crystal is not constant. Therefore, in order to improve the efficiency of the piezoelectric crystal to convert wind energy and raindrop energy into electrical energy, it is necessary to adjust the position and angle of the piezoelectric crystal assembly. All piezoelectric crystals only consider the longitudinal piezoelectric effect, that is, the crystal slice is subjected to positive pressure, and the amount of charge q generated is proportional to the force generated by the force, regardless of the geometric size of the slice. When the opposite side (front side) or the opposite side (reverse side) of the double-sided piezoelectric crystal plate 17 and the first piezoelectric crystal plate 16 is pressed, the hydraulic cylinder 15 is activated, and the rotating shaft 14 The double-sided piezoelectric crystal plate 17 is forced to rotate through the contraction and extension of the hydraulic cylinder 15. When the rotating shaft 14 rotates, it simultaneously drives the first piezoelectric crystal plate whose relative position to the double-sided piezoelectric crystal plate 17 remains unchanged. 16. The second piezoelectric crystal plate 18 and the third piezoelectric crystal plate 19 rotate.

When the second piezoelectric crystal plate 18 or the third piezoelectric crystal plate 19 is pressurized, the motor is turned on, and when the second piezoelectric crystal plate 18 is pressurized, the rotation direction of the motor is the same as that of the motor. When the third piezoelectric crystal plate 19 is pressed, the motor rotates in the opposite direction, and the bracket 11 drives the piezoelectric crystal assembly to swing left or right; When none of the three piezoelectric crystal plates 19 are under pressure, the motor is turned off. When the front of the double-sided piezoelectric crystal plate 17 is pressurized, the piston of the hydraulic cylinder 15 is elongated to make the piezoelectric crystal assembly rotate counterclockwise around the rotating shaft 14 . When the back of the plate 17 is pressed, the piston of the hydraulic cylinder 15 retracts so that the piezoelectric crystal assembly rotates clockwise around the shaft 14 .

Specifically, the conversion of wind energy into electric energy is taken as an example to illustrate:

Because only the longitudinal piezoelectric effect is considered, that is, only the force perpendicular to the slice direction of the piezoelectric crystal will generate electric charge. The known relationship between the piezoelectric crystal slice of the piezoelectric crystal plate and the wind force in the direction of the piezoelectric crystal surface can be expressed by the following formula:

F=W ₀ A sinα;

Among them, F is the component force of the piezoelectric crystal slice of the piezoelectric crystal plate in the direction perpendicular to the surface of the piezoelectric crystal; A is the area of the piezoelectric crystal slice that the wind acts on the piezoelectric crystal plate; The inclination angle between the action line of the piezoelectric crystal plate and the piezoelectric crystal plate, W ₀ is the wind pressure, in KN/m ² .

For a known piezoelectric crystal plate, the relationship between the amount of charge q generated by the piezoelectric crystal slice and the component force F of the piezoelectric crystal slice of the piezoelectric crystal plate in the direction perpendicular to the piezoelectric crystal surface can be used as follows: formula means:

q=kF;

Among them, q is the amount of charge generated by the forward pressure on the piezoelectric crystal slice of the piezoelectric crystal plate; k is a constant related to the piezoelectric crystal of the piezoelectric crystal plate;

Then the open-circuit voltage u ₀ of the piezoelectric crystal plate satisfies the relation:

Among them, C is the capacitance of the piezoelectric crystal plate.

When the piezoelectric crystal assembly is in its original state and there is no wind, the output voltages of the first piezoelectric crystal plate 16 , the second piezoelectric crystal plate 18 , the third piezoelectric crystal plate 19 and the double-sided piezoelectric crystal plate 17 are all 0 , the hydraulic cylinder 15 does not work at this time, and the motor does not rotate. When the state of no wind changes to the wind as shown in FIG. 3 , if the wind in FIG. 3 exerts an outward component force on the first piezoelectric crystal plate 16 along the vertical paper plane in FIG. 3 , the third pressure The transistor plate 19 is pressurized to generate a voltage. After the motor is started, the first gear 12 is driven to rotate clockwise, thereby driving the second gear 13 to rotate counterclockwise until there is no longer any outward component force perpendicular to the paper surface as shown in FIG. 3 , the third The piezoelectric crystal plate 19 is no longer under pressure, the motor is turned off, and the first gear 12 stops rotating. If the wind in FIG. 3 exerts an inward force on the first piezoelectric crystal plate 16 perpendicular to the paper surface in FIG. 3 , the second piezoelectric crystal plate 18 is pressed to generate a voltage, and the motor starts to drive the first gear 12 to rotate counterclockwise , thereby driving the second gear 13 to rotate clockwise, until there is no longer a component force perpendicular to the paper surface in FIG. 3, the second piezoelectric crystal plate 18 is no longer under pressure, the motor is turned off, and the first gear 12 stops rotating, In this way, the wind can just prevent the wind from exerting force on the left and right sides of the first piezoelectric crystal plate 16, and the first gear 12 does not rotate at this time, thereby improving the utilization rate of wind energy.

Suppose θ is the inclination angle between the line of action of the force applied by the wind to the piezoelectric crystal plate and the piezoelectric crystal plate, then when θ<90°, as shown in FIG. 3 , the first piezoelectric crystal plate 16 is stressed, at this time The expression of the output voltage of the first piezoelectric crystal plate is:

Wherein, _Ca is the capacitance of the first piezoelectric crystal plate, ka is _a constant related to the piezoelectric crystal of the first piezoelectric crystal plate, and A _a is the force acting on the first piezoelectric crystal plate The area of the piezoelectric crystal slice, θ is the inclination angle between the action line of the first piezoelectric crystal plate and the first piezoelectric crystal plate, and W ₀ is the wind pressure or rain pressure.

At this time, the piezoelectric crystal on the front side of the double-sided piezoelectric crystal plate 17 is under pressure, while the piezoelectric crystal on the reverse side of the double-sided piezoelectric crystal plate 17 is not under pressure. The expression for the output voltage of the piezoelectric crystal on the front side of the crystal plate 17 is:

Among them, C _b is the capacitance of the piezoelectric crystal on the front of the double-sided piezoelectric crystal plate, k _b is the constant related to the piezoelectric crystal on the front of the double-sided piezoelectric crystal plate, and A _b is the force acting on the double-sided piezoelectric crystal plate. The area of the slice of the piezoelectric crystal on the front side of the piezoelectric crystal plate.

Because θ<90°, u _b > 0, because the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate 17 is not under pressure, so u _c =0, at this time, the hydraulic cylinder 15 is extended, making the piezoelectric crystal assembly counterclockwise Rotate, and θ increases at this time. When θ increases to 90°, that is, when θ=90°, as shown in FIG. 4 , the wind direction is parallel to the double-sided piezoelectric crystal plate 17 , so the front and back sides of the double-sided piezoelectric crystal plate 17 are The piezoelectric crystals are not under pressure. Therefore, the output voltages of the piezoelectric crystals on the front and back of the double-sided piezoelectric crystal plate 17 are both 0, that is, u _b =0, u _c =0, and the hydraulic cylinder 15 is neither stretched nor contracted at this time.

When the direction of the wind suddenly changes from FIG. 4 to FIG. 5 , that is, when θ>90° The piezoelectric crystal is under pressure, and the expression of the output voltage of the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate 17 is obtained according to the geometric relationship as:

Among them, C _c is the capacitance of the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate, k _c is a constant related to the piezoelectric crystal on the reverse side of the double-sided piezoelectric crystal plate, and A _c is the force acting on the double-sided piezoelectric crystal plate. The area of the slice of the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate.

Because θ>90°, u _c > 0, because the front side of the double-sided piezoelectric crystal plate is not pressed, so u _b =0, at this time, the hydraulic cylinder 15 shrinks, so that the first piezoelectric crystal plate 16 rotates clockwise , then θ decreases. When θ is reduced to 90°, that is, when θ=90°, it becomes the situation as shown in FIG. 6 , at which time the hydraulic cylinder 15 does not contract or extend.

变成

从而提高风能利用率。When the wind suddenly stops, the output voltages of the first piezoelectric crystal plate 16 , the second piezoelectric crystal plate 18 , the third piezoelectric crystal plate 19 and the double-sided piezoelectric crystal plate 17 are all 0. At this time, the hydraulic cylinder 15 and the motor are not working. In this way, no matter what the value of θ is when there is wind, the first piezoelectric crystal plate 16 will finally rotate to a direction that is exactly 90° to the direction of the wind, that is, the final output voltage of the first piezoelectric crystal plate 16 is given by

become

Thereby increasing the utilization rate of wind energy.

As mentioned above, when u _a =0, _ub =0, _uc =0, the hydraulic cylinder 15 does not work, and the motor does not rotate; when u _a >0, _ud >0, _ue =0, the first gear 12 rotates clockwise; when u _a > 0, _ud =0, _ue > 0, the first gear 12 rotates counterclockwise; when u _a > 0, _ud =0, _ue =0, the first gear 12 does not Rotation; when u _a > 0, _ub > 0, _uc = 0, the hydraulic cylinder 15 extends; when u _a > 0, _ub = 0, _uc > 0, the hydraulic cylinder 15 contracts; when u _a > 0 , _ub = 0, _uc = 0, the hydraulic cylinder 15 is neither extended nor retracted.

Further, the power conversion device can be installed on a car.

To sum up, in the electric energy conversion device provided by the embodiments of the present invention, the piezoelectric sensing module is used to convert wind energy or raindrop energy into electric energy to supply power to the load, and the charger module is used to store excess electric energy into the battery module In the piezoelectric sensor module, when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is activated to control the piezoelectric crystal assembly Swing left or right, when the opposite side or the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate is pressed, the hydraulic cylinder is activated to control the piezoelectric crystal assembly Rotating around the rotating shaft, by controlling the piezoelectric crystal assembly to adjust the position and angle, the utilization rate of wind energy or raindrop energy is increased.

The above are only preferred embodiments of the present invention, and do not have any limiting effect on the present invention. Any person skilled in the art, within the scope of not departing from the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, all belong to the technical solution of the present invention. content still falls within the protection scope of the present invention.

Claims (7)

1. An electrical energy conversion device, characterized in that it comprises a piezoelectric sensing module, a charger module, a battery module and a load, and the piezoelectric sensing module is used to convert wind energy or raindrop energy into electrical energy to supply power to the load , the charger module is used to store excess electric energy into the battery module; The piezoelectric sensing module includes a bracket, a gear transmission assembly, a hydraulic cylinder and a piezoelectric crystal assembly, the bracket is arranged on the gear transmission assembly, and the piezoelectric crystal assembly includes a first piezoelectric crystal plate, a second piezoelectric crystal plate, and a second piezoelectric crystal plate. The piezoelectric crystal plate, the third piezoelectric crystal plate and the double-sided piezoelectric crystal plate, the first piezoelectric crystal plate and the double-sided piezoelectric crystal plate are all sleeved on a rotating shaft and are always vertically arranged, so The rotating shaft is rotatably arranged on the bracket, the second piezoelectric crystal plate and the third piezoelectric crystal plate are arranged on both sides of the first piezoelectric crystal plate, and the piston of the hydraulic cylinder is connected to the Double-sided piezoelectric crystal plate connection; When the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is activated to control the piezoelectric crystal assembly to swing left or right, and when the double-sided piezoelectric crystal plate is pressed When the opposite side or the opposite side of the crystal plate and the first piezoelectric crystal plate is pressed, the hydraulic cylinder is activated to control the piezoelectric crystal assembly to rotate around the rotating shaft. 2 . The electric energy conversion device according to claim 1 , wherein the gear transmission assembly comprises a motor, a first gear and a second gear, and the motor is connected with the first gear to drive the first gear. 3 . rotate, the first gear meshes with the second gear, the bracket is arranged on the second gear, and when the first gear drives the second gear to rotate, the bracket drives the piezoelectric The crystal assembly swings left or right. 3 . The power conversion device according to claim 2 , wherein when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the motor is turned on, and the second piezoelectric crystal plate is pressed. 4 . The rotation direction of the motor when the transistor plate is pressed is opposite to the direction in which the motor rotates when the third piezoelectric crystal plate is pressed; when the second piezoelectric crystal plate and the third piezoelectric crystal plate are both When unpressurized, the motor is turned off. 4 . The electric energy conversion device according to claim 1 , wherein when the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate is pressed, the piston of the hydraulic cylinder extends. 5 . is long so that the piezoelectric crystal assembly rotates counterclockwise around the rotating shaft. When the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate is pressed, the piston of the hydraulic cylinder Retracted to rotate the piezoelectric crystal assembly clockwise about the axis of rotation. 5. The electric energy conversion device according to claim 1, wherein the output voltage of the first piezoelectric crystal plate is:

Wherein, _Ca is the capacitance of the first piezoelectric crystal plate, ka is _a constant related to the piezoelectric crystal of the first piezoelectric crystal plate, and A _a is the force acting on the first piezoelectric crystal plate The area of the piezoelectric crystal slice, θ is the inclination angle between the action line of the first piezoelectric crystal plate and the first piezoelectric crystal plate, and W ₀ is the wind pressure or rain pressure. 6 . The power conversion device according to claim 5 , wherein the output voltages of the opposite side or the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate are respectively: 6 .

Wherein, C _b is the capacitance of the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate, and C _c is the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate. The capacitance of the piezoelectric crystal on the opposite side of the transistor plate, k _b is the constant related to the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate, and k _c is A constant related to the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate, A _b is the force acting on the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate The area of the slice of the piezoelectric crystal on the opposite side of the piezoelectric crystal plate, A _c is the force acting on the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate. The area of the slice. 7. The electric energy conversion device according to any one of claims 1-6, wherein the electric energy conversion device is arranged on a vehicle.

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