阅读说明：本技术 自供能电子设备 (Self-powered electronic equipment ) 是由 张弛 刘国旭 杨航 郭桐 其他发明人请求不公开姓名 于 2018-09-12 设计创作，主要内容包括：本发明提供一种自供能电子设备,电子设备包括：发电模块,用于收集生物机械能并将所述生物机械能转换成电能；管理模块,所述管理模块与所述发电模块电连接,所述管理模块用于降低所述发电模块的匹配阻抗并转化和/或存储所述电能；以及显示模块,所述显示模块与所述管理模块电连接,所述电能用于供给所述显示模块,所述显示模块用于显示电子信息。本发明提供的电子设备可应用于日常使用,能够完全利用人体自身的机械能为电子设备持续供能。(The invention provides a self-powered electronic device, comprising: the power generation module is used for collecting the biological mechanical energy and converting the biological mechanical energy into electric energy; the management module is electrically connected with the power generation module and is used for reducing the matching impedance of the power generation module and converting and/or storing the electric energy; and the display module is electrically connected with the management module, the electric energy is used for supplying the display module, and the display module is used for displaying electronic information. The electronic equipment provided by the invention can be applied to daily use, and can continuously supply energy to the electronic equipment by completely utilizing the self mechanical energy of a human body.)

1. A self-powered electronic device comprising a housing, wherein the self-powered electronic device further comprises:

the power generation module is used for collecting the biological mechanical energy and converting the biological mechanical energy into electric energy;

the management module is electrically connected with the power generation module and is used for reducing the matching impedance of the power generation module and converting and/or storing the electric energy; and

the display module is electrically connected with the management module, the electric energy is used for supplying the display module, and the display module is used for displaying electronic information.

2. The self-powered electronic device of claim 1, wherein the power generation module comprises a triboelectric nanogenerator.

3. The self-powered electronic device of claim 2, wherein the triboelectric nanogenerator comprises:

a first electrode layer;

an insulating layer disposed on a surface of the first electrode layer; and

a rubbing electrode layer disposed opposite to the insulating layer, the rubbing electrode layer having a variable predetermined distance from the insulating layer.

4. The self-powered electronic device of claim 3, wherein the triboelectric nanogenerator further comprises a plurality of substrate layers, springs disposed between adjacent ones of the plurality of substrate layers, the first electrode layer disposed on a first surface of the substrate layers, the triboelectric electrode layer disposed on a second surface of another substrate layer adjacent to the substrate layers.

5. The self-powered electronic device of any one of claims 2-4, wherein the triboelectric nanogenerator is a honeycomb triboelectric nanogenerator.

6. The self-powered electronic device of claim 5, wherein the triboelectric nanogenerator is disposed at a location of the self-powered electronic device that is capable of accepting a press.

7. The self-powered electronic device of claim 6, wherein the matching impedance of the power generation module is less than 1M Ω when the power generation module is connected to the management module.

8. The self-powered electronic device of any one of claims 1-4, wherein the management module comprises a rectifier bridge, an energy extractor, and a filter circuit; the input end of the rectifier bridge is connected with the power generation module, and the output end of the rectifier bridge is connected with the energy extractor; and the other end of the energy extractor is connected with the filter circuit.

9. The self-powered electronic device of claim 8, wherein the energy extractor comprises a comparator and a field effect transistor, wherein a positive input terminal and a negative input terminal of the comparator are connected to a positive output terminal and a negative output terminal of the rectifier bridge, respectively, and an output terminal of the comparator is connected to the field effect transistor.

10. The self-powered electronic device of claim 9, wherein the filter circuit comprises a first capacitor, a second capacitor, and an inductor; the positive pole of the first capacitor is connected with the inductor, the other end of the inductor is connected with the positive pole of the second capacitor, and the negative pole of the first capacitor is connected with the negative pole of the second capacitor.

11. The self-powered electronic device of claim 10, wherein the positive terminal of the first capacitor is connected to the field effect transistor and the negative terminal of the first capacitor is connected to the negative input terminal of the comparator.

12. A self-powered electronic device as claimed in any of claims 10 to 11 wherein the second capacitor is connected in parallel with the display module.

13. A self-powered electronic device according to any of claims 10-11, wherein the first capacitance has a size of 20-30 μ F, preferably 25 μ F.

14. Self-powered electronic device according to claim 13, wherein the size of the inductance is 240 mH and 300mH, preferably 270 mH.

15. The self-powered electronic device according to claim 8, wherein a reverse withstand voltage value of the rectifier bridge is higher than a peak value of an open circuit voltage output from the power generation module.

16. The self-powered electronic device of claim 8, wherein the recovery time of the rectifier bridge is less than a predetermined time, the predetermined time determined by the frequency of the biomechanical energy.

17. The self-powered electronic device of claim 9, wherein the turn-on voltage of the comparator is greater than a predetermined voltage, the predetermined voltage being a minimum voltage of the comparator when the power generation module maximizes the flow of power into the display module.

18. The self-powered electronic device according to any one of claims 1-17, wherein the self-powered electronic device is an electronic watch.

19. The self-powered electronic device of claim 18,

the power generation module and the management module are combined into a first module, and the first module is electrically connected with the display module; or

The management module and the display module are combined into a second module, and the second module is electrically connected with the power generation module.

20. The self-powered electronic device of claim 19, wherein the first module or the power generation module is disposed in an elbow pad or knee pad.

21. The self-powered electronic device of any one of claims 1-17, wherein the self-powered electronic device is a thermometer.

22. The self-powered electronic device of claim 21, wherein the display module comprises a plurality of buttons for controlling the switching of the thermometer and changing the display mode of the temperature.

23. The self-powered electronic device of any one of claims 1-17, wherein the self-powered electronic device is a calculator.

24. The self-powered electronic device of claim 23, wherein the power generation module is mounted inside a housing of the calculator, and the power generation module generates power by pressing the corresponding housing.

Technical Field

The invention relates to the technical field of energy, in particular to self-powered electronic equipment.

Background

With the increasing demand of society for energy, the energy problem becomes more and more acute, and the search for clean and renewable energy is more and more focused by global scientists. Meanwhile, people also examine the energy source problem by themselves. The large amount of daily movement of human beings can produce a large amount of mechanical energy, and the mechanical energy is wasted without being utilized, and how to carry out secondary recovery from the energy is gradually the problem of mainstream scientific field exploration. The friction nano generator is a good medium for secondary recovery of biological mechanical energy, and can convert the biological mechanical energy into electric energy for utilization. The materials for manufacturing the friction generator are wide in source, and different generator forms can be designed according to different application fields. Friction generators are receiving increasing attention from researchers.

At present, intelligent electronic equipment is receiving more and more public attention, and flexible and portable microelectronic devices are becoming more and more popular, but the energy problem is still the bottleneck for blocking similar equipment. The microelectronic device needs to be charged frequently, which makes the use of the microelectronic device extremely inconvenient. Meanwhile, it can be seen that electronic devices all contain batteries, but batteries are rich in substances harmful to the environment, and the disposal of the batteries is extremely troublesome. The demand for new alternative energy sources is very slow.

Disclosure of Invention

In order to overcome at least one aspect of the above problems, embodiments of the present invention provide an electronic device for converting bio-mechanical energy into electrical energy to power itself, which can autonomously collect mechanical energy from the movement of a human body and convert it into electrical energy to supply to a display module, so that the electronic device can continue to operate normally under the driving of the human body mechanical energy.

According to an aspect of the present invention, there is provided a self-powered electronic device including: a housing; the power generation module is used for collecting the biological mechanical energy and converting the biological mechanical energy into electric energy; the management module is electrically connected with the power generation module and is used for reducing the matching impedance of the power generation module and converting and/or storing electric energy; and the display module is electrically connected with the management module, the electric energy is used for supplying the display module, and the display module is used for displaying the electronic information.

According to some embodiments of the self-powered electronic device of the present invention, the power generation module comprises a triboelectric nanogenerator.

According to some embodiments of the self-powered electronic device of the present invention, the triboelectric nanogenerator comprises: a first electrode layer; an insulating layer provided on a surface of the first electrode layer; and a friction electrode layer disposed opposite the insulating layer, the friction electrode layer having a variable predetermined distance from the insulating layer.

According to some embodiments of the self-powered electronic device of the present invention, the triboelectric nanogenerator further comprises a plurality of substrate layers, the springs being disposed between adjacent ones of the plurality of substrate layers, the first electrode layer being disposed on a first surface of a substrate layer, the triboelectric electrode layer being disposed on a second surface of another substrate layer adjacent to the substrate layer.

According to some embodiments of the self-powered electronic device of the present invention, the triboelectric nanogenerator is a honeycomb triboelectric nanogenerator.

According to some embodiments of the self-powered electronic device of the present invention, the triboelectric nanogenerator is disposed at a location of the self-powered electronic device that is capable of accepting a press.

According to some embodiments of the self-powered electronic device of the present invention, the matching impedance of the power generation module is less than 1M Ω after the power generation module is connected to the management module.

According to some embodiments of the self-powered electronic device of the present invention, the management module comprises a rectifier bridge, an energy extractor, and a filter circuit; the input end of the rectifier bridge is connected with the power generation module, and the output end of the rectifier bridge is connected with the energy extractor; the other end of the energy extractor is connected with the filter circuit.

According to some embodiments of the self-powered electronic device of the present invention, the energy extractor comprises a comparator and a field effect transistor, the positive input terminal and the negative input terminal of the comparator are connected to the positive output terminal and the negative output terminal of the rectifier bridge, respectively, and the output terminal of the comparator is connected to the field effect transistor.

In accordance with some embodiments of the self-powered electronic device of the present invention, the filter circuit comprises a first capacitor, a second capacitor, and an inductor; the positive electrode of the first capacitor is connected with the inductor, the other end of the inductor is connected with the positive electrode of the second capacitor, and the negative electrode of the first capacitor is connected with the negative electrode of the second capacitor.

According to some embodiments of the self-powered electronic device of the present invention, the positive terminal of the first capacitor is connected to the field effect transistor, and the negative terminal of the first capacitor is connected to the negative input terminal of the comparator.

According to some embodiments of the self-powered electronic device of the present invention, the second capacitor is connected in parallel with the display module.

According to some embodiments of the self-powered electronic device according to the invention, the first capacitance has a size of 20-30 μ F, preferably 25 μ F.

According to some embodiments of the self-powered electronic device of the present invention, the size of the inductor is 240-300mH, preferably 270 mH.

According to some embodiments of the self-powered electronic device of the present invention, the reverse withstand voltage value of the rectifier bridge is higher than a peak value of an open-circuit voltage output by the power generation module.

According to some embodiments of the self-powered electronic device of the present invention, the recovery time of the rectifier bridge is less than a predetermined time, the predetermined time being determined by the frequency of the biomechanical energy.

According to some embodiments of the self-powered electronic device of the present invention, the turn-on voltage of the comparator is greater than a predetermined voltage, the predetermined voltage being a minimum voltage of the comparator when the power of the power generation module is maximally flowed into the display module.

Compared with the prior art, the invention has at least one of the following advantages:

(1) by converting the bio-mechanical energy into electric energy, the invention does not need an external power supply;

(2) the management module greatly improves the conversion efficiency of energy.

Drawings

Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.

FIG. 1 is a schematic structural diagram of a self-powered electronic device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the operation of a triboelectric nanogenerator according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a triboelectric nanogenerator according to an embodiment of the invention;

FIG. 4 is a schematic view of a friction nanogenerator installation location according to an embodiment of the invention;

FIG. 5 is an external connection diagram of a self-powered electronic device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a sequence of embedding modules of a self-powered electronic device according to an embodiment of the invention;

FIG. 7 is a schematic view of a self-powered electronic device actually worn according to an embodiment of the invention;

fig. 8 is a schematic diagram of a 120 hour test of a self-powered electronic device according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.

The invention provides electronic equipment capable of converting biological mechanical energy into electric energy, which can automatically collect the biological mechanical energy from the movement of a human body and convert the biological mechanical energy into the electric energy, and can maximally apply the energy to a display module through the storage and conversion of a management module, so that the electronic equipment can continuously and normally work under the driving of the human mechanical energy.

The embodiments of the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a self-powered electronic device according to an embodiment of the present invention. As shown in fig. 1, the self-powered electronic apparatus includes a power generation module 1 for collecting bio-mechanical energy from the outside and converting the bio-mechanical energy into electric energy; the management module 2 is electrically connected with the power generation module 1, and the management module 2 is used for reducing the matching impedance of the power generation module 1 and converting and/or storing electric energy; and a display module 3 electrically connected to the management module 2, the display module 3 for displaying electronic information such as time, and the power applied to the display module 3. The electronic information is not limited to time information, and may include information such as step count, calorie, temperature, number, and the like, and may include, for example, software and communication information if the electronic device is connected to another intelligent terminal. The display module 3 also includes a human-machine interaction function. For example, keys may be provided on the display module 3 through which human-computer interaction is performed. In some embodiments, for example, the electronic device is a thermometer, and two keys may be disposed on the display module, although the number of keys is not limited thereto, and one key may switch the display mode of the temperature, and the other key may turn on or off the power supply. In some other embodiments, the electronic device may also be a calculator, and a plurality of keys may be disposed on the display module, and the calculation function may be implemented by the keys.

The management module 2 comprises a rectifier bridge 21, an energy extractor 22 and a filter circuit 28. The input end of the rectifier bridge 21 is connected with the power generation module 1, and the output end is connected with the energy extractor 22; the other end of the energy extractor 22 is connected to a filter circuit 28. The filter circuit 28 comprises a first capacitor 23, a second capacitor 24 and an inductor 25. The first capacitor 23 is used for filtering and the second capacitor 24 is used for storing electrical energy. The energy extractor 22 comprises a comparator 26 and a field effect transistor 27, the energy extractor 22 being connected in parallel with the first capacitor 23. The second capacitor 24 is connected in parallel with the display module 3.

The rectifier bridge 21 is constituted by a plurality of diodes, and in the present embodiment, the rectifier bridge 21 is constituted by four diodes. The rectifier bridge 21 is used to convert the input ac power into dc power. In the present embodiment, the input end of the rectifier bridge 21 is connected to the power generation module 1, and the output end is connected to the energy extractor 22, so that the ac power input by the power generation module 1 can be converted into dc power and transmitted to the energy extractor 22. In each working cycle of the rectifier bridge 21, only two diodes work at the same time, and alternating current is converted into unidirectional direct current through the unidirectional conduction function of the diodes.

The positive input end and the negative input end of the comparator 26 are respectively connected with the positive output end and the negative output end of the rectifier bridge 21, and the output end of the comparator 26 is connected with the grid of the field effect transistor 27; the source of the field effect transistor 27 is connected with the positive input end of the comparator 26, the drain of the field effect transistor 27 is connected with the positive electrode of the first capacitor 23, and the negative electrode of the first capacitor 23 is connected with the negative input end of the comparator 26; in addition, one end of the inductor 25 is connected to the positive electrode of the first capacitor 23, the other end of the inductor 25 is connected to the positive electrode of the second capacitor 24, the negative electrode of the first capacitor 23 is connected to the negative electrode of the second capacitor 24, and the positive electrode and the negative electrode of the second capacitor 24 are respectively connected to two ends of the display module 3. The comparator 26 controls the on and off of the field effect transistor 27, the input impedance of the field effect transistor 27 is high, the coupling capacitance is small, and the field effect transistor can be conveniently used as a constant current charging source for charging the second capacitor 24. The second capacitor 24 stores electrical energy and provides electrical energy to the display module 3 for operation of the display module 3.

According to the preferred embodiment, the power generation module 1 comprises a friction nano generator, the friction nano generator can be arranged in the wearable device, then the wearable device is fixed on the human body movement part, and in the human body movement process, the friction nano generator collects the biological mechanical energy and stores and converts the biological mechanical energy into electric energy through the management module 2. The friction nano generator can be arranged in a honeycomb shape, and can collect the biological mechanical energy to the maximum extent and convert the biological mechanical energy into electric energy. The electrical energy generated by the friction nano-generator may be alternating current, and the management module 2 converts the alternating current into direct current for use by the display module 3. Of course, in other embodiments, the power generation module may directly generate the dc power, and the management module 2 further converts the generated dc power into electric power suitable for the display module 3.

In the present embodiment, the friction nano-generator in the power generation module 1 may be not only a flexible friction nano-generator, but also a friction nano-generator for collecting vibration energy, and a device for collecting other kinds of human mechanical energy. In the present embodiment, a contact separation mode friction nanogenerator is employed. The contact separation mode friction nano-generator can generate electric energy by contact and separation, that is, by pressing. The friction nanometer generator in the contact separation mode is arranged on the electronic equipment, and when the electronic equipment needs to be used, the electronic equipment can be continuously operated for a period of time by pressing the corresponding position of the electronic equipment, such as a shell. Fig. 2 is a schematic diagram of the operation of the friction nanogenerator according to an embodiment of the invention. As shown in fig. 2, the contact separation mode friction nanogenerator includes a friction electrode layer 13, a high polymer insulating layer 12, and a first electrode layer 11.

The first electrode layer 11 and the high molecular polymer insulating layer 12 are bonded together, and the friction electrode layer 13 and the first electrode layer 11 are respectively used as output electrodes of electric signals of the friction nano-generator in the contact separation mode. In the initial state, a predetermined gap which can be changed exists between the high molecular polymer insulating layer 12 and the rubbing electrode layer 13; the polymer insulating layer 12 and the rubbing electrode layer 13 are in contact with each other by an external force. As shown in fig. a, when the friction nano-generator in the contact separation mode is completely contacted, the external magnetic field is constant and the direction is vertical to the paper surface, and due to the principle of triboelectrification, the friction electrode layer 13 and the polymer insulating layer 12 will take the same amount of charges with opposite electric charges. As shown in fig. B, in the process of starting the separation of the rubbing electrode layer 13, the first electrode layer generates static charge due to the principle of electrostatic induction, and the generation of the static charge changes the capacitance between the first electrode layer 11 and the rubbing electrode layer 13, thereby generating a potential difference. Due to the potential difference, free electrons will flow from the side with the lower potential to the side with the higher potential through the external circuit, thereby creating a current in the external circuit. As shown in fig. C, when the separation is maximized, the system reaches an electrostatic equilibrium state, where no current flows in the external circuit. As shown in fig. D, when the rubbing electrode layer 13 approaches the polymer insulating layer 12, electrons in the rubbing electrode layer 13 are transferred to the first electrode layer 11 in an external circuit. By repeated contact separation, a periodic alternating current signal can be formed in the external circuit.

Fig. 3 is a schematic structural diagram of a triboelectric nanogenerator according to an embodiment of the invention. The triboelectric nanogenerator comprises a plurality of substrate layers 14, with springs 15 disposed between adjacent substrate layers 14 of the plurality of substrate layers 14. The base layer 14 is made of a strong and durable insulating material, such as acrylic. The first electrode layer 11 is provided on a first surface of the base layer 14, and the polymer insulating layer 12 is provided on a surface of the first electrode layer 11 opposite to the base layer 14, and the rubbing electrode layer 13 is provided on a second surface of the other base layer 14 adjacent to the polymer insulating layer 12. In this embodiment, the first surface is a lower surface of the substrate layer 14 and the second surface is an upper surface of the substrate layer 14, and in other embodiments, the first surface may be an upper surface of the substrate layer 14 and the second surface may be a lower surface of the substrate layer 14. The triboelectric nanogenerator further comprises a support plate 16, the support plate 16 being connected to an end of the plurality of substrate layers 14, which may be, for example, the lowermost end, for supporting the plurality of substrate layers 14.

In certain embodiments, the first electrode layer 11 and the friction electrode layer 13 may be made of any combination of metals, alloys and conductive oxides, the metals may be, for example, at least one of the following: gold, silver, copper, aluminum, platinum, palladium, chromium, nickel, and the like, and the alloy may be, for example, at least one of the following: aluminum alloys, magnesium alloys, copper alloys, titanium alloys, nickel alloys, tin alloys, and the like; the conductive oxide material may be, for example, Indium Tin Oxide (ITO).

The polymer insulating layer 12 may be an insulating material that is resistant to electron loss, such as polytetrafluoroethylene, fluorinated ethylene propylene (FEP, copolymer of tetrafluoroethylene and hexafluoropropylene), Polydimethylsiloxane (PDMS), polyimide, polydiphenyl propane carbonate, polyethylene terephthalate, aniline formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine formaldehyde, polyethylene glycol succinate, cellulose acetate, polyethylene adipate, polydiallyl phthalate, regenerated cellulose sponge, polyurethane elastomer, styrene propylene copolymer, styrene-acrylonitrile copolymer, styrene butadiene copolymer, polyamide nylon, polymethacrylate, polyvinyl alcohol, polyester, polyisobutylene, polyurethane elastomer, polyurethane flexible sponge, polyethylene terephthalate, polyethylene glycol, polypropylene, Polyvinyl butyral, a phenol resin, chloroprene rubber, a butadiene-propylene copolymer, natural rubber, polyacrylonitrile, poly (vinylidene chloride-co-acrylonitrile), polyethylene propylene carbonate, polystyrene, polymethyl methacrylate, polycarbonate, polychloroprene, polyacrylonitrile, acetate, polybiphenol carbonate, polychlorinated ether, polychlorotrifluoroethylene, polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, parylene and the like, the material of the insulating layer is not limited to one, and may be one or more of the above materials.

In some embodiments, the opposite surfaces of the polymer insulating layer 12 and the friction electrode layer 13 have microstructures, which may be any combination of nanowires, nanotubes, nanoparticles, nanorods, nanoflowers, nanochannels, microchannels, nanocones, nanospheres, and microsphere spherical structures, so as to increase the contact area between the polymer insulating layer 12 and the friction electrode layer 13, and facilitate generation and accumulation of charges, thereby further improving the conversion efficiency of converting bio-mechanical energy into electric energy and the power generation efficiency of the friction nanogenerator. The microstructure can be prepared on the surface of the high-insulation layer by methods such as photoetching, chemical etching, plasma etching and the like, and can also be directly formed when an insulation layer material is prepared.

Fig. 4 is a schematic view of a friction nanogenerator installation location according to an embodiment of the invention. As shown in fig. 4, the self-powered electronic device is a calculator, and a friction nano-generator as a power generation module may be installed inside a housing, and the power generation module may generate electric power by pressing the corresponding housing.

In the embodiment, the peak value of the open-circuit voltage output by the friction nano-generator is 400-600V, and the peak value of the output short-circuit current is 100-170 muA. The rated current of the display module selected in this embodiment is 0.4-1.2 muA, and the rated voltage is 1.5-2.0V. Based on this, the management module 2 is designed to meet the requirement of good operation of the electronic device under high-voltage impact at the input end and to transfer the maximized energy to the display module 3. In the present embodiment, in order to obtain the highest energy conversion efficiency, the maximum application to the rear end is achieved, and the characteristics of ultra-high voltage and low current output inherent in the friction nano-generator are considered, so in the present embodiment, the reverse withstand voltage value of the rectifier bridge 21 is higher than the peak value of the open-circuit voltage output by the power generation module 1, that is, the reverse withstand voltage value of the rectifier bridge is higher than 600V, the forward voltage is higher than 1.3V, the forward current is higher than 1A, and the leakage current is lower than 5 μ a. The recovery time of the rectifier bridge 21 is less than a predetermined time, which is determined by the frequency of the biomechanical energy. In this embodiment, the frequency of the human body's biomechanical energy is between 1-10Hz, so the corresponding recovery time of the rectifier bridge is less than 1 μ s. In this embodiment, the parameters of the energy extractor directly determine whether the collected bio-mechanical energy can be converted in time, in order to make the friction generator fully contact and have stable output, the turn-on voltage of the comparator 26 needs to be greater than the predetermined voltage, the predetermined voltage is the minimum voltage of the comparator when the electric energy of the power generation module 1 maximally flows into the display module 3, in this embodiment, the predetermined voltage is 15V, so the turn-on voltage of the comparator 26 is set to be greater than 15V to turn on, which can ensure that the energy of the friction nano-generator maximally flows into the rear end in this embodiment. In the filter circuit stage, the first capacitor 23 should be between 20-30 μ F, preferably 25 μ F, according to the selection principle of the filter capacitor. Meanwhile, the size of the inductor 25 is between 240-300mH, preferably 270 mH.

Fig. 5 is an external connection diagram of a self-powered electronic device according to an embodiment of the present invention. As shown in fig. 5, the self-powered electronic device is an electronic watch, and the power generation module 1 and the management module 2 can be arranged in an elbow pad or a knee pad, but in other embodiments, the power generation module 1 and the management module 2 can also be directly arranged together with the display module 3, for example, directly arranged on a hand, and can generate biological mechanical energy when the hand swings, so as to supply electric energy to the electronic device. The power generation module 1 can be disposed at a place where the frequency and magnitude of human motion are relatively large, such as the sole of a foot, so that it is easier to collect bio-mechanical energy. The position 11 in fig. 5 shows an exemplary place where the power generation module 1 may be arranged, but this is not a limitation to the place where the power generation module 1 is arranged, and it should be understood that all movable parts of a human body can be provided with the power generation module 1. In fig. 5, reference numeral 12 denotes an elbow guard incorporating at least the power generation module 1, and is connected to the display module 3 by a wire. Of course, in other embodiments, the elbow pad having the power generation module 1 built therein may be connected to the display module 3 wirelessly by bluetooth or the like.

The open-circuit voltage peak value output by the friction nano generator under the action of external force is about 400-600V, the short-circuit current peak value output by the friction nano generator under the action of the external force with the frequency of 1-10Hz is between 100-170 muA, and the short-circuit charge transfer peak value is more than 200 nC. The external force in the embodiment includes extrusion force, pulling force and stress for restoring the original shape of the friction nano generator after the external force is applied to the nano generator. The internal resistance of the friction nano generator is extremely high, and if the display module 3 is directly matched with the friction nano generator, the matching resistance is as high as 35-100M omega, so that the display module 3 is difficult to obtain the whole energy of the friction nano generator. In the present embodiment, the management module 2 is matched with the parameters of the friction nano-generator, so that the matching impedance of the friction nano-generator is reduced from 35-100M Ω to less than 1M Ω. Therefore, the energy conversion efficiency of less than 21 percent of the original friction nano generator directly connected with the display module 3 can be improved to more than 80 percent. After the friction nano generator is connected with the management module 2, under the condition that arms realize full swing with elbows as the center, the electronic equipment can be started and can continuously work for more than 25s after 2-6 times, wherein the normal working current of the electronic equipment in the embodiment is 3-6 muA, the normal working voltage is 1.5-3.0V, and therefore the power of normal working is 4.5-18 muW, and the energy collected by the friction nano generator and converted by the module in the process is more than 0.45 mJ.

Fig. 6 is a schematic diagram of a sequence of embedding modules of a self-powered electronic device according to an embodiment of the invention. As shown in fig. 6, a and b represent different embedding orders, respectively, and thus have different module combinations. a represents that the power generation module 1 and the management module 2 are integrated into a first module, then are nested to the motion part of the human body, are directly stored and converted when the biological mechanical energy is collected, and supply the converted electric energy to the display module 3. b denotes that the management module 2 and the display module 3 are first integrated into a second module and then combined with the power generation module 1.

Fig. 7 is a schematic view of the actual wearing of a self-powered electronic device according to an embodiment of the invention. The electronic device may be an electronic watch, and as shown in fig. 7, the power generation module 1, the management module 2, and the display module 3 are integrated into one device, and are worn on a human body by a wearable device (for example, a watch band), and are preferably worn on a hand for the purpose of observing time. The whole device can collect energy autonomously in the movement process of the human body, can supply energy autonomously, and does not need to provide external attached storage energy sources such as chemical energy and the like.

Fig. 8 is a schematic diagram of a 120 hour test of a self-powered electronic device according to an embodiment of the invention. As shown in fig. 8, the electronic device is tested every 10 hours within 120 hours, the power generation module 1 stops moving every time the electronic device starts to operate, and the operating time of the electronic device does not significantly decay in the whole testing process, which proves the stability of the electronic device and the continuity of the output of the power generation module 1 in the embodiment.

The electronic equipment provided by the invention can automatically collect mechanical energy from the movement of the human body and convert the mechanical energy into electric energy, and the energy can be maximally applied to the display module through the storage and conversion of the management module, so that the electronic equipment can continuously and normally work under the driving of the mechanical energy of the human body. The friction nanometer generator adopted by the invention can be stacked in multiple layers, and the output power can be correspondingly improved. In addition, the film electrode and the film high molecular polymer are adopted as the friction layer, so that the relative thickness is very small, and the thickness and the weight of the electronic equipment are reduced. And because the energy that the friction nanometer generator gathered passes through special power management module, can realize the high-efficient collection of low frequency movement energy, satisfy several times and press and need not continuously press the friction nanometer generator, can provide the continuous operation tens of seconds's of electronic equipment demand.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.