Axle-end gravity ball-driven piezoelectric ceramic power generation device and power generation method thereof

Abstract

The present invention relates to a gravity ball-driven piezoelectric ceramic power generation device at the axle end and a power generation method thereof. A piezoelectric ceramic power generation device is provided at the axle end; the piezoelectric ceramic power generation device rotates through the axle end to apply pressure to the piezoelectric ceramic for power generation; the piezoelectric ceramic power generation device is connected to the input end of a rectifying device; the input end of a charging management module is connected in parallel to the output end of the rectifying device; the output end of the charging management module is connected to a power storage device, solving the technical problem in the prior art that during the driving process of a vehicle, the mechanical energy of vibration during the driving process cannot be recycled, resulting in waste of resources. At the same time, it has the advantages of simple structure, no heat generation, no electromagnetic interference, no pollution, and can meet the power demand of in-vehicle low-power consumption products; compared with new energy sources such as solar energy, wind energy, and thermal energy, it is less affected by the natural environment; the service life of key components is long, and later maintenance is relatively easy.

Description

Technical Field

[0001] Embodiments of the present invention relate to a power generation device and a power generation method thereof, and particularly to a vehicle axle end gravity ball-driven piezoelectric ceramic power generation device and a power generation method thereof. Background Art

[0002] In the prior art, during the driving process of a vehicle, the mechanical energy of vibration during driving cannot be recycled, resulting in a waste of resources. Summary of the Invention

[0003] An object of the embodiments of the present invention is to provide a power generation device capable of recycling the mechanical energy of vibration during driving.

[0004] To achieve the above object, embodiments of the present invention design a vehicle axle end gravity ball-driven piezoelectric ceramic power generation device, including:

[0005] Vehicle axle end;

[0006] Piezoelectric ceramic power generation device, the piezoelectric ceramic power generation device is arranged on the vehicle axle end; the piezoelectric ceramic power generation device rotates through the vehicle axle end, applies pressure to the piezoelectric ceramic, and generates electricity;

[0007] Rectifying device, the rectifying device is connected to the input end of the rectifying device on the piezoelectric ceramic power generation device;

[0008] Charging management module, the input end of the charging management module is connected in parallel to the output end of the rectifying device;

[0009] Power storage device, the output end of the charging management module is connected to the power storage device.

[0010] Further, the vehicle axle end further includes:

[0011] Axle, the axle is arranged at the central position of the vehicle axle end;

[0012] Shell, a shell is coaxially fixed outside the axle; the piezoelectric ceramic power generation device is arranged in the shell;

[0013] Wheel axle assembly, the wheel axle assembly is coaxially fixed to the shell.

[0014] Further, the piezoelectric ceramic power generation device further includes:

[0015] Cantilever beam spring pieces, one ends of a plurality of the cantilever beam spring pieces are evenly fixed on the circumference of the axle in the vehicle axle end;

[0016] A counterweight ball, the counterweight ball is fixed at the other end of the cantilever beam spring piece; the counterweight ball is arranged inside the housing near the axle end;

[0017] A gravity ball, a gravity ball is arranged between the counterweight ball and the housing; during the rotation of the axle end, the gravity ball moves along the inner side of the housing; during the movement, the counterweight ball and the cantilever beam spring piece are toggled;

[0018] A piezoelectric ceramic, one end of the piezoelectric ceramic is fixed on the side surface of the housing;

[0019] A compression spring, one end of the compression spring is fixed on the other end of the piezoelectric ceramic; the other end of the compression spring is fixed on the cantilever beam spring piece near the axle; the gravity ball bends the cantilever beam spring piece by gravity to form a lever structure.

[0020] Furthermore, the rectifying device is a rectifier bridge; the input end of the rectifying device is connected to the output end of the piezoelectric ceramics connected in parallel.

[0021] Furthermore, the charging management module is a vehicle power management module; the input end of the charging management module is connected to the output end of the rectifier bridge.

[0022] Furthermore, it is characterized in that the output end of the charging management module is connected in parallel to the electricity storage device.

[0023] In the present invention, a power generation method for a gravity ball-driven piezoelectric ceramic power generation device at the axle end is also provided, including the following steps:

[0024] During the rotation of the axle end, due to the action of gravity, the gravity ball does not rotate with the axle end but only makes a reciprocating swing near the lowest point of the housing; the rotation of the axle end drives the spring cantilever beam to rotate, and the cantilever beam spring piece continuously drives the gravity ball; when the gravity ball reaches a certain height, the impact force combined with its own gravity causes the deformation of the cantilever beam spring piece again, and the cantilever beam spring piece releases the gravity ball, and the gravity ball accelerates and falls back to the lowest point of the housing along the inner wall circumference of the housing; after the cantilever beam spring piece leaves the gravity ball, it starts to make a reciprocating vibration, cyclically pulling and pressing the piezoelectric ceramic sheet, and the piezoelectric ceramic sheet generates a continuous pulsed voltage; each spring piece will have the same movement when it touches the gravity ball, generating an approximate pulsed voltage; all the piezoelectric ceramic sheets are connected in parallel, and the generated voltage is rectified by the rectifier bridge and then stabilized by the charging management module. Finally, the output stabilized current is used to charge the electricity storage device.

[0025] Compared with the prior art, an embodiment of the present invention provides a piezoelectric ceramic power generation device disposed at the axle end. The piezoelectric ceramic power generation device generates electricity by applying pressure to the piezoelectric ceramic through the rotation of the axle end. The input end of a rectifying device is connected to the piezoelectric ceramic power generation device, the input end of a charging management module is connected in parallel to the output end of the rectifying device, and the output end of the charging management module is connected to a power storage device, thereby solving the technical problem in the prior art that the mechanical energy of vibration during vehicle driving cannot be recycled, resulting in waste of resources. Meanwhile, the present invention has the advantages of simple structure, no heat generation, no electromagnetic interference, no pollution, and can meet the power demand of in-vehicle low-power consumption products. Piezoelectric power generation technology is an energy utilization method that is energy-saving and environmentally friendly. Compared with new energy sources such as solar energy, wind energy, and thermal energy, it is less affected by the natural environment. The key components have a long service life and are relatively easy to maintain later. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the working state of the present invention;

[0028] Figure 3 It is a schematic diagram of the power storage circuit of the present invention;

[0029] Figure 4 It is a schematic diagram of the piezoelectric ceramic power generation device of the present invention;

[0030] Figure 5 It is a schematic diagram of the piezoelectric ceramic power generation principle of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present invention, many technical details are provided to help the reader better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in each claim of the present application can still be implemented.

[0032] The first embodiment of the present invention relates to a piezoelectric ceramic power generation device driven by gravity balls at the axle end, as shown in Figure 1 , Figure 2 , Figure 3 , and includes:

[0033] In this embodiment, the axle end 100 is mainly used to install the piezoelectric ceramic power generation device 200;

[0034] A piezoelectric ceramic power generation device 200 is provided on the axle end 100; the piezoelectric ceramic power generation device 200 rotates through the axle end 100 to apply pressure to the piezoelectric ceramic 6 for power generation; the piezoelectric ceramic power generation device 200 mainly functions to generate electricity.

[0035] The piezoelectric ceramic power generation device 200 is connected to the input end of a rectifying device 8; the rectifying device 8 is used to rectify the approximately pulsed voltage generated by the piezoelectric ceramic 6 to form direct current.

[0036] The input end of a charging management module 9 is connected in parallel to the output end of the rectifying device 8; the charging management module 9 mainly conducts charging management on the direct current output by the rectifying device 8 to achieve management of the entire current.

[0037] The output end of the charging management module 9 is connected to a power storage device 10. The power storage device 10 is used to store the electric energy generated by the piezoelectric ceramic power generation device 100, which is the direct current after being rectified by the rectifying device 8.

[0038] The axle end gravity ball-driven piezoelectric ceramic power generation device in this embodiment solves the technical problem in the prior art that during the driving process of a vehicle, the vibration mechanical energy during driving cannot be recycled, resulting in waste of resources.

[0039] To solve the above technical problems, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the axle end 100 in the axle end gravity ball-driven piezoelectric ceramic power generation device in this embodiment further includes:

[0040] An axle 11 is provided at the central position of the axle end 100; the axle 11 serves as a device for energy output.

[0041] A housing 2 is coaxially fixed outside the axle 11; the piezoelectric ceramic power generation device 200 is arranged in the housing 2; the housing 2 is used for installing the piezoelectric ceramic power generation device 200.

[0042] The wheel axle assembly 1 is coaxially fixed to the housing 2, and the wheel axle assembly 1 is used to generate energy by rolling.

[0043] To solve the above technical problems, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the piezoelectric ceramic power generation device 200 in the axle end gravity ball-driven piezoelectric ceramic power generation device in this embodiment further includes:

[0044] One end of a plurality of evenly distributed cantilever beam reeds 4 is fixedly provided on the circumference of the axle in the axle end 100; the cantilever beam reeds 4 mainly function to tension and compress the piezoelectric ceramic 6.

[0045] Fix a counterweight ball 3 at the other end of the cantilever spring piece 4; the counterweight ball 3 is arranged inside the housing 2 near the axle end 100; the main function of the counterweight ball 3 is to increase the force for pulling and pressing the piezoelectric ceramic 6 when the cantilever spring piece 4 pulls and presses the piezoelectric ceramic 6.

[0046] Arrange a gravity ball 7 between the counterweight ball 3 and the housing 2; the gravity ball 7 moves along the inside of the housing 2 during the rotation of the axle end 100; during the movement, the gravity ball 7 toggles the counterweight ball and the cantilever spring piece 4; the gravity ball 7 plays a pressing role during the rotation of the axle end 100.

[0047] Fix one end of the piezoelectric ceramic 6 on the side surface of the housing 2; the piezoelectric ceramic 6 mainly utilizes the principle of piezoelectric effect as Figure 5 shown. If pressure is applied to the piezoelectric ceramic 6, it will generate a potential difference (referred to as the direct piezoelectric effect). Conversely, if a voltage is applied, mechanical stress will be generated (referred to as the inverse piezoelectric effect). That is to say, the piezoelectric ceramic 6 has the function of converting and inversely converting between mechanical energy and electrical energy.

[0048] Fix one end of the compression spring 5 on the other end of the piezoelectric ceramic 6; the other end of the compression spring 5 is fixed on the cantilever spring piece 4 near the axle 11; the gravity ball 7 bends the cantilever spring piece 4 by gravity, forming a lever structure. The function of the compression spring 5 is to make the cantilever spring piece 4 rebound, and under the action of the gravity ball 7, the piezoelectric ceramic sheet 6 is repeatedly pulled and pressed, and the piezoelectric ceramic sheet generates a continuous pulse voltage. Each spring piece will have the same movement when it touches the gravity ball, generating an approximate pulse voltage.

[0049] To solve the above technical problems, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the rectifying device 8 of the axle-end gravity ball-driven piezoelectric ceramic power generation device in this embodiment is a rectifier bridge; the input end of the rectifying device 8 is connected to the output ends of the piezoelectric ceramics 6 connected in parallel. All the piezoelectric ceramics 6 are connected in parallel, and the generated voltage is rectified by the rectifier bridge and then stabilized by the charging management module 9, and finally the stabilized current output is used to charge the power storage device 10.

[0050] To solve the above technical problems, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the charging management module 9 of the axle-end gravity ball-driven piezoelectric ceramic power generation device in this embodiment is a vehicle power management module; the input end of the charging management module 9 is connected to the output end of the rectifier bridge. The main function of the charging management module 9 is to manage the charging condition of the power storage device 10.

[0051] To solve the above technical problems, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 shown, the output end of the charging management module 9 of the axle-end gravity ball-driven piezoelectric ceramic power generation device in this embodiment is connected in parallel to the power storage device 10.

[0052] In the second embodiment of the present invention, a power generation method for an axle-end gravity ball-driven piezoelectric ceramic power generation device is further provided, including the following steps:

[0053] During the rotation of the axle end 100, due to the action of gravity, the gravity ball 7 does not rotate with the axle end 100 but only makes a reciprocating swing near the lowest point of the housing 2; the rotation of the axle end 100 drives the spring cantilever beam 4 to rotate, and the cantilever beam spring 4 continuously drives the gravity ball 7; when the gravity ball 7 reaches a certain height, the impact force superimposed on its own gravity causes the cantilever beam spring 4 to deform, and the cantilever beam spring 4 releases the gravity ball 7, and the gravity ball 7 accelerates and falls back to the lowest point of the inner wall of the housing 2 along the circumference; after the cantilever beam spring 4 leaves the gravity ball 7, it starts to make a reciprocating vibration, cycling to pull the piezoelectric ceramic 6, and the piezoelectric ceramic 6 generates a continuous pulsed voltage; every time the cantilever beam spring 4 touches the gravity ball 7, the same movement will occur, generating an approximate pulsed voltage; all the piezoelectric ceramics 6 are connected in parallel, and the generated voltage is rectified by the rectifier bridge 8 and then regulated by the charging management module 9. Finally, the output regulated current is used to charge the power storage device 10.

[0054] In the present invention, according to the following analysis and calculation formulas, the power generation of the axle-end gravity ball-driven piezoelectric ceramic power generation device can be realized.

[0055] 1. Periodic force of piezoelectric ceramic

[0056] The counterweight ball 3 on the cantilever beam spring 4 contacts the gravity ball 7 and pushes the gravity ball 7 to follow the circumference of the housing 2. Adjust the elastic deformation coefficient of the cantilever beam spring 4 so that the gravity of the gravity ball is slightly greater than the elastic force of the spring sheet when it is about 1 / 4 of the circumference. At this time, the gravity of the gravity ball 7 causes the cantilever beam spring 4 to deform and releases the gravity ball 7. The pressure received by the counterweight ball 3 on the cantilever beam spring 4 is close to the gravity of the gravity ball, and the gravity of the gravity ball 7 can be used to equivalently represent the pressure received by the counterweight ball 3 on the cantilever beam spring 4.

[0057] V = 4 / 3 * πr 3 m = ρ * V G = mg

[0058] According to the above formulas, the gravity of the gravity ball 7 can be deduced, that is, the pressure received by the counterweight ball 3 on the cantilever beam spring 4. Assume that the position lever arm of the piezoelectric ceramic 6 is 1 / n of that of the counterweight ball 3 on the cantilever beam spring 4, and the pressure acting on the piezoelectric ceramic 6 is amplified by n times.

[0059] F1 = n * G

[0060] After the counterweight ball 3 on the cantilever beam reed 4 leaves the gravity ball 7, it undergoes free vibration by itself and is equivalent to a spring oscillator. The pressure of the spring oscillator vibration on the piezoelectric ceramic is deduced according to the following spring oscillator calculation formula:

[0061] F2 = n * k * x (k is the spring coefficient, x is the spring compression deformation)

[0062] 2. Equivalent capacitance of piezoelectric ceramic

[0063] In this embodiment, the piezoelectric power generation device has 8 cantilever beam structures evenly distributed in a circle, and each cantilever beam corresponds to a piezoelectric ceramic 6. The equivalent capacitance of the piezoelectric ceramic is deduced with reference to the following calculation formula:

[0064] C = n * ε33 * ε0 * A / ds

[0065] - C is the equivalent capacitance of a single piezoelectric ceramic

[0066] - n is the number of layers of piezoelectric ceramic

[0067] - ε33 is the relative dielectric constant of the piezoelectric ceramic

[0068] - ε0 is the absolute vacuum dielectric constant 8.854 * 10 - 12 (F / m)

[0069] - A is the cross - sectional area of the piezoelectric ceramic

[0070] - ds is the height of the piezoelectric ceramic

[0071] 3. Voltage generated by the piezoelectric ceramic under periodic force

[0072] According to the following formula, the voltages U1 and U2 generated by the piezoelectric ceramic 6 under the action of the gravity ball 7 force F1 and the spring oscillator force F2 can be estimated:

[0073] U = g33 * F * ds / A

[0074] - U is the peak voltage of the piezoelectric ceramic

[0075] - g33 is the piezoelectric voltage constant (10 - 3 Vm / N)

[0076] - F is the acting force

[0077] - ds is the height of the piezoelectric ceramic

[0078] - A is the cross - sectional area of the piezoelectric ceramic

[0079] 4. Power generation of the piezoelectric ceramic power generation device

[0080] Electric quantity Q1 / Q2 generated per second under the action of F1 / F2

[0081] Q1 = U1 * C1 * f1, Q2 = U2 * C2 * f2

[0082] - The acting frequency f1 of the gravity ball can be deduced based on the driving speed and the wheel diameter.

[0083] - The vibration frequency f2 of the spring oscillator is deduced according to T = 2π√(m / k) and f = 1 / T.

[0084] According to the power formula P = P1 + P2 = U1 * (Q1 / t) + U2 * (Q2 / t), the power generation power P of this piezoelectric ceramic power generation device can be estimated.

[0085] The gravity ball-driven piezoelectric ceramic power generation device at the axle end in this embodiment has the following advantages compared with the prior art:

[0086] 1. Simple structure, no heat generation, no electromagnetic interference, no pollution, and can meet the power demand of in-vehicle low-power-consuming products;

[0087] 2. The piezoelectric power generation technology is an energy utilization method of energy conservation and environmental protection. Compared with new energy sources such as solar energy, wind energy, and thermal energy, it is less affected by the natural environment;

[0088] 3. Collecting the energy that is easily overlooked in life is also conducive to the popularization and promotion of the concept of energy conservation and environmental protection;

[0089] 4. The service life of key components is long, and later maintenance is relatively easy.

[0090] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A gravity ball-driven piezoelectric ceramic power generation device at the axle end, characterized in that, Comprising: Axle end; Piezoelectric ceramic power generation device, with the piezoelectric ceramic power generation device provided on the axle end; The piezoelectric ceramic power generation device rotates through the axle end to apply pressure to the piezoelectric ceramic for power generation; Rectifying device, with the input end of the rectifying device connected to the piezoelectric ceramic power generation device; Charge management module, with the input end of the charge management module connected in parallel to the output end of the rectifying device; Electric energy storage device, with the output end of the charge management module connected to the electric energy storage device; The axle end further comprises: Axle, with the axle provided at the central position of the axle end; Shell, with a shell coaxially fixed outside the axle; the piezoelectric ceramic power generation device is provided in the shell; Wheel axle assembly, with the wheel axle assembly coaxially fixed to the shell; The piezoelectric ceramic power generation device further comprises: Cantilever beam spring pieces, with one ends of several cantilever beam spring pieces evenly fixed on the circumference of the axle in the axle end; Counterweight balls, with the counterweight balls fixed to the other ends of the cantilever beam spring pieces; the counterweight balls are arranged close to the inner side of the shell of the axle end; Gravity balls, with a gravity ball arranged between the counterweight balls and the shell; during the rotation of the axle end, the gravity ball moves along the inner side of the shell; during the movement, the gravity ball toggles the counterweight balls and the cantilever beam spring pieces; Piezoelectric ceramics, with one end of the piezoelectric ceramics fixed on the side surface of the shell; Compression spring, with one end of the compression spring fixed to the other end of the piezoelectric ceramics; the other end of the compression spring is fixed to the cantilever beam spring piece near the axle; the gravity ball bends the cantilever beam spring piece by gravity to form a lever structure.

2. The axle end gravity ball-driven piezoelectric ceramic power generation device according to claim 1, wherein, The rectifying device is a rectifier bridge; the input end of the rectifying device is connected to the output end of the parallel-connected piezoelectric ceramics.

3. The axle-end gravity ball-driven piezoelectric ceramic power generation device according to claim 1, wherein The charge management module is a vehicle power management module; the input end of the charge management module is connected to the output end of the rectifier bridge.

4. The axle-end gravity ball-driven piezoelectric ceramic power generation device according to claim 1, characterized in that The output end of the charge management module is connected in parallel to the electric energy storage device.

5. The power generation method of the axle end gravity ball-driven piezoelectric ceramic power generation device according to claim 1, characterized in that Including the following steps: During the rotation of the axle end, due to the action of gravity, the gravity ball does not rotate with the rotation of the axle end but only makes a reciprocating swing near the lowest point of the shell; the rotation of the axle end drives the spring cantilever beam piece to rotate, and the cantilever beam spring piece continuously drives the gravity ball; when the gravity ball reaches a certain height, the impact force combined with its own gravity causes the deformation of the cantilever beam spring piece again, and the cantilever beam spring piece releases the gravity ball, and the gravity ball accelerates and falls back to the lowest point of the inner wall of the shell along the circumference; after the cantilever beam spring piece leaves the gravity ball, it starts to make a reciprocating vibration, cycling to pull and press the piezoelectric ceramics, and the piezoelectric ceramics generate a continuous pulsed voltage; each cantilever beam spring piece will have the same movement when it touches the gravity ball, generating an approximate pulsed voltage; all the piezoelectric ceramics are connected in parallel, and the generated voltage is rectified by the rectifier bridge and then stabilized by the charge management module. Finally, the output stabilized current is used to charge the electric energy storage device.

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