WO2012065371A1

WO2012065371A1 - Portable power generating device and intelligent terminal

Info

Publication number: WO2012065371A1
Application number: PCT/CN2011/070721
Authority: WO
Inventors: 刘昭元
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-11-18
Filing date: 2011-01-27
Publication date: 2012-05-24
Also published as: CN102025289B; CN102025289A

Abstract

A portable power generating device comprises a stator (1) and a rotor (4) coaxial with each other. The rotor (4) rotates around a shaft. The stator (1) is provided with a plurality of iron cores. Metal coils (2) are wound on the iron cores. The metal coils (2) are connected with each other. The rotor (4) is provided with magnet bodies (3) opposite to the metal coils (2). The rotor (4) has an eccentric wheel structure. The device further comprises a plurality of piezoelectric bodies (5) and a voltage processing unit. An end of each piezoelectric body (5) is fixed on the stator (1), and the piezoelectric bodies (5) are connected with each other. The voltage output terminal of the piezoelectric bodies (5) and the voltage output terminal of the metal coils (2) are connected with the voltage processing unit respectively. Voltages output from the piezoelectric bodies (5) and the metal coils (2) are rectified by the voltage processing unit respectively, and then are output after filtered together. The portable power generating device can automatically convert energy generated by natural motions of a human body in various directions to electric energy, and thus can be used as a working power supply of an intelligent terminal.

Description

Portable power generation device and intelligent terminal

The present invention relates to a portable power generating device, and more particularly to a portable power generating device that can be used in an intelligent terminal and an intelligent terminal including the portable power generating device. Background technique

With the promotion of new telecom technologies, more and more telecommunication services, and the power consumption of various services are also increasing, and the requirements for the endurance of smart terminals are increasing. At present, the endurance capability of intelligent terminals has become a bottleneck in the development of intelligent terminals. In response to this situation, currently known solutions are mainly for selecting high-capacity, high-performance batteries for smart terminals. However, this does not fundamentally solve the problem of the endurance of the smart terminal, but also increases the size and manufacturing cost of the smart terminal.

With the maturity of ceramic power generation technology, combined with its high efficiency, fast response and simple structure, more and more fields use this technology to provide power for various devices. If the publication number is

CN101645666A, the Chinese patent application published on Feb. 10, 2010, discloses a ground ceramic piezoelectric generator, the core of which is to convert the energy generated by ground vibration in daily life into electric energy; the publication number is CN1633009A, A method and system for utilizing vibration energy piezoelectric power generation of a highway system is disclosed in the Chinese patent application published on June 29, 2005. The core of the technical solution is to use the ground vibration generated by the automobile when driving on the road as a road. The side indicator lights are powered. At present, electromagnetic power generation is a very mature power generation technology. However, known generators convert mechanical energy into electrical energy by means of circular motion or linear reciprocating motion. Such a power generating device needs to provide a fixed direction of external force to the generator shaft (or crank) to drive it to generate electricity. For example, CN101399857A, published on April 1, 2009, is a Chinese mobile phone with a power generation function. The core of the technical solution is a hand-cranked generator assembled inside the mobile phone. When needed, the casing can be used. The upper handle is used to charge the phone battery. The publication number is CN10167436A, the Chinese invention patent published on March 17, 2010 discloses a hand-pinch type charging mobile phone, and the core of the technical solution is to reciprocally hold a handle connected with a reciprocating rack when needed to realize power generation. phone charging. All of the above inventions require user-specific and fixed actions to achieve power generation. Although it is possible to charge the mobile phone, it requires a lot of inconvenience in use due to the user's extra work. Summary of the invention

In view of the above, it is a primary object of the present invention to provide a portable power generating device and an intelligent terminal that can be used as a power source for an intelligent terminal as long as the user carries the portable power generating device.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A portable power generating device comprising a coaxial stator and a rotor, the rotor rotating along a shaft; the stator is provided with at least one metal core, the metal core is wound with a metal coil; and the rotor is provided with The metal coil corresponds to a magnet body; the rotor is an eccentric wheel structure; the device further includes at least one piezoelectric body and a voltage processing unit; one end of the piezoelectric body is fixed on the stator, between the piezoelectric bodies Connected to each other; the voltage output end of the piezoelectric body and the voltage output end of the metal coil are respectively connected to the voltage processing unit; the voltage processing unit respectively rectifies the voltage outputted by the piezoelectric body and the metal coil , then filter together and output.

Preferably, the stator is an annular structure, and when the metal core is two or more, it is disposed on the inner wall of the stator in a circumferential array, and the metal core is oriented such that the metal core is axially oriented. The stator is arranged in a radial manner.

Preferably, the magnet bodies are disposed on the outer circumference of the rotor in a circumferential array, and the magnet body is disposed such that a direction of magnetic flux of the magnet body faces a radial direction of the rotor.

Preferably, the piezoelectric body includes a metal film electrode, a ceramic piezoelectric body, and a resonance block, wherein the metal film electrode is disposed between the ceramic piezoelectric body. Preferably, when the piezoelectric body is two or more, the piezoelectric bodies are connected in series or in parallel;

The interconnection between the metal coils is specifically such that the metal wires of the metal coils are connected to each other end to end.

Preferably, one end of the piezoelectric body is fixed to an inner wall of the stator.

Preferably, the device further includes an end cover, the end cover is fixedly coupled to the rotating shaft of the rotor, and the stator is fixedly coupled to the end cover.

Preferably, the piezoelectric body is disposed in a gap between the end cover and the rotor.

Preferably, the metal core is an iron core, a soft iron core or a silicon steel core.

An intelligent terminal comprising the portable power generating device described above, wherein the portable power generating device is connected to a working circuit of the smart terminal and used as a power source of the smart terminal.

The portable power generating device of the present invention can automatically convert energy generated by natural movements in various directions (front, rear, left and right, up and down, etc.) into electric energy; the portable power generating device of the present invention uses two types of power generation methods, namely, magnetic power generation and piezoelectric power generation, to make the power generation device It is designed to be smaller in size and thinner in thickness, making it easy for users to carry around and charge various smart terminals. The portable power generating device of the present invention can also be incorporated in the smart terminal to charge the smart terminal at any time. The portable power generating device of the present invention does not require the user to perform work exclusively during power generation, and only needs to carry it with him, regardless of the posture, and the user can automatically generate electricity and use it very conveniently. Since the portable power generating device of the present invention can charge the smart terminal at any time, the endurance capability of the smart terminal can be effectively increased. The portable power generating device of the present invention uses a thin annular magnetic generator and is provided with a ceramic piezoelectric body at its axial end, which greatly reduces the volume of the device, makes it more suitable for portable applications, or is directly assembled in smart On the terminal. DRAWINGS

1 is a schematic structural view of a portable power generating device of the present invention;

Figure 2 is a cross-sectional view of the portable power generating device of the present invention; 3 is a schematic structural view of a voltage processing unit of the portable power generating device of the present invention. detailed description

1 is a schematic structural view of a portable power generating device of the present invention, and FIG. 2 is a cross-sectional view of the portable power generating device of the present invention. As shown in FIG. 1 and FIG. 2, the portable power generating device of the present invention specifically includes a coaxial stator 1, a rotor 4, and a rotor 4. The stator 1 is provided with a plurality of iron cores (not shown), the metal core is wound around the iron core 2, and the metal coils 2 are connected to each other; the rotor 4 is provided with the metal coil 2 Magnet body 4. In the present invention, the stator 1 has a circular ring structure, and the stator 1 includes an iron core (not shown) and a plurality of sets of metal coils 2. In the present invention, the stator 1 also serves as the outer casing of the portable power generating device of the present invention. The stator 1 can be stamped from a high-strength silicon steel, and is mainly used for fixing the metal coil 2, and provides a magnetic path for the magnetoelectric generation method of the portable power generating device of the present invention. The metal coil 2 is wound on the iron core of the stator 1, and the coils are sequentially connected in the manner of "first, last, one end, one head". In the present invention, the iron cores are evenly distributed on the stator 1 in a circumferential array.

In the present invention, the iron core may be another metal core or a metal alloy core such as a silicon steel core or a soft iron core. Other metal cores may be used as long as the magnetic permeability of the metal or metal alloy is sufficiently large.

In the present invention, the rotor 4 is an eccentric wheel structure; the rotor is in the shape of a disk, and half of it is hollowed out (can be excavated or simply thinned) by machining, and the metal on the outer edge and the stator The permanent magnet 3 is embedded in the opposite side of the coil 2. When the permanent magnet 3 is inlaid, the direction of the magnetic field line should be along the radial direction of the eccentric wheel, and the principle of adjacent reversal should be adopted, that is, the outer end magnetic pole is assembled in the manner of "N-S-N-S-N". In the present invention, the eccentric of the rotor 4 means that its center of gravity is shifted to one side, and the flywheel will naturally sag due to gravity. That is to say, the rotor 4 has an unsteady structure, and when there is an external force such as a user walking or riding a vehicle, the rotor 4 will rotate according to the center of gravity of the eccentric wheel without rotating the shaft attachment, thereby driving the permanent magnet 3 to rotate, that is, The magnetic flux of the metal coil 2 is cut to form a current in the metal coil 2 to realize a power generation function.

In the present invention, in order to fully exert the power generation function of the portable power generator of the present invention, pressure is also provided. Electric body 5. The piezoelectric body in the present invention is specifically a ceramic piezoelectric body composed of several sets of multilayer ceramic piezoelectric bodies, each of which is composed of a plurality of layers of an elastic metal film (also serving as an electrode), a ceramic piezoelectric body, and a resonance block. The composition, wherein the metal film electrode is arranged between the ceramic piezoelectric body. The metal film, the ceramic piezoelectric body and the resonant block are all made into a compact whole by electroplating and other heat treatment processes. By adjusting the mass, shape and mounting position of the resonator block, the natural resonant frequency of each ceramic piezoelectric body can be adjusted, and the maximum power generation efficiency has been reached. These sets of ceramic piezoelectric bodies can be connected in parallel or in series according to different requirements. Parallel connection is to connect the positive poles of all ceramic piezoelectric bodies together, and all the negative electrodes are connected together. In series mode, each ceramic piezoelectric body is connected by a "positive one negative one positive one negative" connection method. The voltage output in parallel mode is low but the current is large, while the series connection method outputs a high voltage but a small current. Piezoelectric materials can be selected from ferroelectric materials with high conversion efficiency or PZT ceramic piezoelectrics. The resonant block can be annularly crimped or soldered to the ceramic piezoelectric body 5 by using a large proportion of metallic copper. The resonant frequency can be adjusted by adjusting the mass and the ring size to achieve maximum power generation efficiency. In the portable power generating device of the present invention, the ceramic piezoelectric body is hollowed out in the middle and the ring-shaped resonator block is used, and the power generation efficiency of the generator can be further improved. In Fig. 2, four ceramic piezoelectric bodies 5 are shown, and the output leads of each of the ceramic piezoelectric bodies 5 are connected in series, and attention is paid to the polarity when connected, so that "positive one minus one positive and one negative" is connected.

As shown in Fig. 2, the fifth end of the piezoelectric body is fixed to the inner wall of the stator 1, and the other end is free. Thus, when the user moves, power generation is achieved by the movement of the free end of the piezoelectric body 5.

In the present invention, a plurality of piezoelectric bodies 5 can be provided, and the more the power generation efficiency is set.

Preferably, the metal core in the present invention is also provided in plurality, and the more the number of metal cores provided, the better the power generation effect of the portable power generating device of the present invention.

As shown in FIG. 2, the portable power generating device of the present invention further includes an end cover, and the end cover specifically includes a left end cover and a right end cover. Or as shown in FIG. 2, the left end cap 8 and the right end cap 9. The stator 1 is assembled with the left end cap 8 and the right end cap 9 by screws. The sleeve of the eccentric flywheel (rotor 4) and the shaft of the left end cover 8 have a clearance fit, so that the flywheel can be flexibly rotated. Bushing on the left end cap shoulder and right end cap 9 The axial position of the rotor is fixed; the ceramic piezoelectric body 5 is fixedly mounted on the stator 1 through the insulating rubber pad 7; the circuit board 10 is assembled between the right end cover 9 and the stator 1, and is pressed by the insulating rubber pad 7 and the ceramic The electric body 5 is insulated.

Considering that the ceramic generator and the magnetic generator are different, and the polarity of the electricity they output at a certain time is not necessarily the same, the present invention uses separate rectifier circuits. 3 is a schematic structural view of a voltage processing unit of the portable power generating device of the present invention. As shown in FIG. 3, AC1 and AC2 are connected to a winding wire of a metal coil, and AC3 and AC4 are connected to a ceramic power generating body output line. After the output voltage of the magnetic generator and ceramic generator passes through the full bridge rectifier bridges Zl and Z2, it becomes the pulsed DC voltage, and then filtered by the filter capacitor C1 and input to the DC-DC voltage converter D2 to convert the input voltage into an output voltage ( That is, the voltage required by the smart terminal). Capacitor C2 is a DC-DC output filter capacitor. D1 is a Zener diode, and its reverse-conducting voltage is selected to be slightly lower than the D2 input protection voltage. This can protect D2 and capacitor C1 on the one hand, and avoid D2 lock-up on the other hand. The lock-up phenomenon means that when the rectified and filtered output voltage exceeds the DC-DC over-voltage protection threshold, the DC-DC will automatically stop working. After the DC-DC stops working, the rectified and filtered output voltage has no discharge loop, which causes the input voltage to rise further, resulting in no output at the output for a long time.

Under the action of gravity, the eccentric flywheel will naturally sag. When the user moves, the eccentric flywheel will reciprocate (cross-section along the axis) so that the magneto generator coil moves relative to the permanent magnet. When the coil flux changes, the generator coil emits alternating current. At the same time, the ceramic piezoelectric body 5 and the resonance block 6 generate axial vibration, and the ceramic piezoelectric body 5 converts the kinetic energy of the vibration into electric energy. Both the magneto generator and the ceramic piezoelectric body emit alternating current. The rectification, filtering, and voltage conversion circuits on the circuit board 10 convert the alternating current into various voltages required by the intelligent terminal.

In the present invention, the ceramic piezoelectric body has a diameter of 40 mm and a thickness of 0.37 mm. Each of the ceramic piezoelectric bodies can provide an average power of 18 mW during normal walking, and the four ceramic piezoelectric bodies can provide a power of 72 mW. The magnet generator can generate about l lOmW during normal walking of the human body. Power. The entire device can provide approximately 182 mW of power. At present, the standby power of an ordinary mobile phone is about 12 to 20 mW, so that there is sufficient power margin for charging the battery during standby. In this way, when the mobile phone is used normally, the mobile phone battery can be charged as long as there is exercise, and the battery life is increased.

The portable power generating device of the present invention can be applied to various smart terminals. Specifically, the portable power generating device of the present invention can be installed in various smart terminals and connected to the working circuit of the smart terminal for use as a smart terminal. power supply. Smart terminals such as mobile phones, PDAs, personal digital assistants, etc. Of course, the smart terminal can also be a terminal such as a notebook or a mobile PC.

Of course, the portable power generating device of the present invention is not limited to the above-described size, and those skilled in the art should understand that the size of the portable power generating device of the present invention can be correspondingly set according to the volume of the smart terminal. Of course, the portable power generating device of the present invention can also be set to a large size, and can be used as an external power source of the smart terminal in use.

The portable power generating device of the present invention can also be installed in a vehicle, such as in a car, so that the user can supply power to the driver's own smart terminal while driving the car.

The present invention also describes an intelligent terminal provided with the portable power generating device described above. Smart terminals such as mobile phones, PDAs, personal digital assistants, etc.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

What is claimed is: 1. A portable power generating device, comprising: a coaxial stator and a rotor, wherein the rotor rotates along a shaft; the stator is provided with at least one metal core, and the metal core is wound with a metal a coil; the rotor is provided with a magnet body corresponding to the metal coil; the rotor is an eccentric wheel structure; the device further includes at least one piezoelectric body and a voltage processing unit; On the stator, the piezoelectric bodies are connected to each other; the voltage output end of the piezoelectric body and the voltage output end of the metal coil are respectively connected to the voltage processing unit; the voltage processing unit pairs the piezoelectric body and the The voltages outputted by the metal coils are respectively rectified, filtered together and output.

The portable power generator according to claim 1, wherein the stator has an annular structure, and when the metal core is two or more, it is disposed on the inner wall of the stator in a circumferential array, and The metal core is disposed in such a manner that the metal core is axially oriented toward a radial direction of the stator.

The portable power generator according to claim 1, wherein the magnet body is disposed on the outer circumference of the rotor in a circumferential array, and the magnet body is oriented in a direction of magnetic lines of the magnet body. The rotor is arranged in a radial manner.

The portable power generating device according to claim 1, wherein the piezoelectric body includes a metal film electrode, a ceramic piezoelectric body, and a resonance block, wherein the metal film electrode and the ceramic piezoelectric body Interphase setting.

The portable power generator according to claim 2, wherein when the piezoelectric body is two or more, the piezoelectric bodies are connected in series or in parallel;

The portable power generator according to claim 1, wherein one end of the piezoelectric body is fixed to an inner wall of the stator.

7. The portable power generating apparatus according to claim 1, wherein said apparatus further comprises an end cover, said end cover being fixedly coupled to a rotating shaft of said rotor, said stator being fixedly coupled to said end cover.

The portable power generator according to claim 1, wherein the piezoelectric body is provided in a gap between the end cover and the rotor.

The portable power generating apparatus according to any one of claims 1 to 8, wherein the metal core is an iron core, a soft iron core or a silicon steel core.

10. A smart terminal, comprising: the portable power generating device according to any one of claims 1 to 9, wherein the portable power generating device is connected to a working circuit of the smart terminal and used as the smart terminal power supply.