CN111740637A - Omnidirectional sliding energy acquisition device, flexible direct power supply micro system and electronic equipment - Google Patents

Omnidirectional sliding energy acquisition device, flexible direct power supply micro system and electronic equipment Download PDF

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CN111740637A
CN111740637A CN202010639267.0A CN202010639267A CN111740637A CN 111740637 A CN111740637 A CN 111740637A CN 202010639267 A CN202010639267 A CN 202010639267A CN 111740637 A CN111740637 A CN 111740637A
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comb
flexible
grid
energy
sliding
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CN111740637B (en
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张晓升
李愿芳
张艺潇
黄文�
龚天巡
王硕
钱恒毅
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
    • H02N1/04—Friction generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

The invention discloses an omnidirectional sliding energy acquisition device, a flexible direct power supply micro system and electronic equipment, and relates to the technical field of micro energy, wherein the technical scheme is as follows: the omnidirectional energy acquisition unit comprises a sliding block and fixed blocks distributed in an array manner, and the sliding block and the fixed blocks form an independent sliding type friction nano generator; the sliding block and the fixed block are of grid-shaped structures, the fixed block comprises a first comb-shaped grid and a second comb-shaped grid which are symmetrical, the first comb-shaped grid and the second comb-shaped grid are formed by odd-numbered grids and even-numbered grids which are alternately arranged, and the odd-numbered grids and the even-numbered grids are respectively connected with a positive electrode and a negative electrode; when the sliding block slides along the X-axis direction, the odd-numbered grids and the even-numbered grids form electrodes of the friction nano generator; when the sliding block slides along the Y-axis direction, the first comb-shaped grid and the second comb-shaped grid form an electrode of the friction nano generator, and the problems that the existing friction nano generator is weak in charge transfer capacity and low in mechanical energy collection efficiency are solved.

Description

Omnidirectional sliding energy acquisition device, flexible direct power supply micro system and electronic equipment
Technical Field
The invention relates to the technical field of micro energy, in particular to an omnidirectional sliding energy acquisition device, a flexible direct power supply micro system and electronic equipment.
Background
The internet of things is a newly developed field, the development of the internet of things is very rapid, the internet of things relates to aspects in our lives, the huge network of the internet of things brings new challenges to our current electronic industry, the energy demand of wearable electronic equipment and implantable electronic equipment is very urgent, and batteries and capacitors are generally used for supplying energy to the equipment, and the equipment is not practical and is not convenient due to the fact that the capacity of the equipment is limited and the equipment is large in size and must be charged or replaced frequently. The extraction of energy from mechanical energy of the surrounding environment or biomechanical energy of human motion to achieve sustainable work is one of the most promising strategies to address such problems. In the past few years, a friction nano generator (TENG) is becoming an energy collection method with very potential energy, and has the advantages of high performance, light weight, simple structure, low cost, high benefit and the like.
The existing friction nano-generator can be mainly divided into four types according to the working mode: the contact separation type, the relative sliding type, the independent sliding type and the single-electrode type are adopted, the sliding type friction nano generator has higher energy density and higher output, and the traditional relative sliding type and the independent sliding type adopt a whole block of material as a friction layer and have no better separation process, so that the charge transfer can not be completely transferred. In addition, the traditional sliding mode is that the mechanical energy is collected by reciprocating sliding in only one direction, and the sliding friction is irregular in real life, so that the mechanical energy collection efficiency of the friction nano-generator is low.
Disclosure of Invention
In order to solve the problems of weak charge transfer capability and low mechanical energy acquisition efficiency of the conventional friction nano generator, the invention provides an omnidirectional sliding energy acquisition device, a flexible direct power supply micro system and electronic equipment.
The technical purpose of the invention is realized by the following technical scheme:
in a first aspect, an omni-directional sliding energy harvesting device is provided, comprising:
at least one omnidirectional energy collection unit;
the omnidirectional energy acquisition unit comprises a sliding block and at least two fixed blocks distributed in an array manner, and the sliding block and any one of the fixed blocks form an independent sliding type friction nano generator;
the sliding block and the fixed block are of grid-shaped structures, the fixed block comprises a first comb-shaped grid and a second comb-shaped grid which are symmetrical, the first comb-shaped grid and the second comb-shaped grid are respectively composed of an odd-numbered grid and an even-numbered grid which are alternately arranged, and the odd-numbered grid and the even-numbered grid are respectively connected with a positive electrode and a negative electrode;
when the sliding block slides along the X-axis direction, the odd-numbered grids and the even-numbered grids form electrodes of the friction nano generator;
when the sliding block slides along the Y-axis direction, the first comb-shaped grid and the second comb-shaped grid form an electrode of the friction nano-generator.
Preferably, the fixed block is provided with two first electrodes and two second electrodes;
the two first electrodes are positioned at the opposite edges of the first comb-shaped grid and the second comb-shaped grid and are connected with the corresponding odd-numbered grids;
the two second electrodes are positioned at the back edges of the first comb-shaped grids and the second comb-shaped grids and are connected with the corresponding even-numbered grids.
Preferably, the fixed block and/or the sliding block are flexible substrate polyimide films PI, and the friction surface of the fixed block is covered with flexible polytetrafluoroethylene films PTFE.
Preferably, the surface of the grid-like structure is coated with a layer of fibroin solution for moisture sensing and/or as a friction layer.
In a second aspect, a flexible direct power supply microsystem is provided, which includes a micro energy harvesting device and a flexible energy management unit, which are cascaded, the micro energy harvesting device and the flexible energy management unit are integrated on the same flexible substrate by a flexible printed circuit board FPCB technology or a screen printing technology, and the micro energy harvesting device is the omnidirectional sliding energy harvesting device according to any one of claims 1 to 4.
Preferably, the flexible energy management unit comprises a rectification module, a peak detection module, a switch module and a voltage reduction module, wherein the switch module is connected in series between the rectification module and the voltage reduction module;
the rectification module is used for converting the alternating current pulse voltage output by the micro energy acquisition device into direct current pulse voltage and then outputting the direct current pulse voltage;
the peak value detection module comprises a voltage comparator, a logic circuit and an RC differential circuit and is used for carrying out pulse detection on the output direct current pulse voltage and sending a switch control signal to the switch module when the direct current pulse voltage reaches a peak value;
the switch module is used for conducting the rectifying module and the voltage reduction module after being closed according to the switch control signal so as to realize maximum energy transfer;
and the voltage reduction module is used for reducing the peak voltage output after the switch module is conducted and then outputting the reduced peak voltage.
Preferably, the bottom surface of the flexible substrate is covered with a PVDF piezoelectric film, and the PVDF piezoelectric film is cascaded with the flexible energy management unit.
Preferably, the flexible substrate is provided with a thermoelectric acquisition layer, the thermoelectric acquisition layer being cascaded with the flexible energy management unit.
In a third aspect, an electronic device is provided, which includes at least one omni-directional sliding energy harvesting device as described in any one of the above.
In a fourth aspect, an electronic device is characterized by comprising the flexible direct power supply microsystem.
Compared with the prior art, the invention has the following beneficial effects:
1. the system can collect sliding friction mechanical energy in any direction, solves the defect that the traditional sliding friction nano generator can only slide in a certain direction, and improves the collection efficiency of the mechanical energy;
2. the grid-shaped structure can realize rapid charge transfer, and the energy collection capability is improved;
3. the triboelectricity is converted into direct current and is subjected to voltage reduction treatment, so that the energy conversion efficiency is improved;
4. the modules of the invention are integrated on a flexible substrate Polytetrafluoroethylene (PI) by using a Flexible Printed Circuit Board (FPCB) technology or a screen printing technology to form a flexible microsystem which can directly supply power; the system integrates energy collection and energy management, and can be directly used as a power supply system to supply power for common electronic equipment;
5. the flexible energy management unit is selected from electronic components with small size and low power consumption, and the energy management module has small size, can have better flexibility and bendability, is easy to integrate with the friction nano-generator and electronic equipment, and has wide application prospect for future scientific and technological development.
6. Compared with the traditional battery power supply, the method has no flammable and explosive hazards and needs to be replaced regularly, saves the energy consumption of the earth and reduces the pollution.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a single fixed block friction nano-generator integrated with a flexible energy management unit in an embodiment of the invention;
FIG. 2 is a schematic diagram of the operation of the omnidirectional energy collection unit in an embodiment of the present invention;
FIG. 3 is a schematic diagram of the integration of a plurality of fixed-block friction nanogenerators with a flexible energy management unit in an embodiment of the invention;
FIG. 4 is a functional block diagram of a flexible energy management unit in an embodiment of the present invention;
FIG. 5 is a circuit schematic of a flexible energy management unit in an embodiment of the invention;
FIG. 6 is an equivalent circuit diagram of the switch of the flexible energy management unit according to the embodiment of the present invention;
FIG. 7 is a graph of experimental verification output voltage for a triboelectric nanogenerator in an embodiment of the invention;
fig. 8 is a graph of the direct power supply of the flexible energy management unit to the energy storage capacitor in an embodiment of the invention.
Reference numbers and corresponding part names in the drawings:
101. a rectification module; 102. a peak detection module; 103. a switch module; 104. a voltage reduction module;
201. a fixed block; 202. a slider; 203. flexible polytetrafluoroethylene film PTFE; 204. a flexible substrate polyimide film PI;
301. an odd-numbered grid; 302. an even-numbered bit grid; 303. a first electrode; 304. a second electrode; 305. a first comb-shaped grid; 306. a second comb-shaped grid.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to examples 1 to 3 and accompanying drawings 1 to 8, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1: the omnidirectional sliding energy collection device, as shown in fig. 1 and 3, includes an omnidirectional energy collection unit. The omnidirectional energy acquisition unit comprises a sliding block 202 and three fixed blocks 201 which are distributed in an array mode, wherein the fixed blocks 201 are S1, S2 and S3 respectively, the vertical distance between every two adjacent fixed blocks 201 is 0.3mm, and the sliding block 202 and any one fixed block 201 form an independent sliding type friction nano generator. Wherein, the fixed block 201 can be increased or decreased according to the requirement.
As shown in fig. 1, the slider 202 and the fixed block 201 are both in a grid structure, the fixed block 201 includes a first comb-tooth-shaped grid 305 and a second comb-tooth-shaped grid 306 which are symmetrical, the first comb-tooth-shaped grid 305 and the second comb-tooth-shaped grid 306 are both composed of an odd-numbered grid 301 and an even-numbered grid 302 which are alternately arranged, and the odd-numbered grid 301 and the even-numbered grid 302 are respectively connected with positive and negative electrodes. The first grid on the far left in the figure is defined as an odd-numbered grid 301 and the adjacent grid is defined as an even-numbered grid 302. Copper is coated on the grids, and each grid is 22mm in length and 1.7mm in width.
As shown in fig. 1, the fixed block 201 is provided with two first electrodes 303 and two second electrodes 304. The two first electrodes 303 are located at the opposite edges of the first comb-tooth-shaped grid 305 and the second comb-tooth-shaped grid 306, and are connected to the corresponding odd-numbered grids 301. The two second electrodes 304 are located at the back edges of the first comb-tooth-shaped grid 305 and the second comb-tooth-shaped grid 306, and are connected to the corresponding even-numbered grids 302.
As shown in fig. 2, in the present embodiment, the fixed block 201 and the slider 202 are flexible substrate polyimide films PI 204. The friction surface of the fixed block 201 is covered with a flexible polytetrafluoroethylene film PTFE203 with the thickness of 0.01-0.1 mm.
In this example, the surface of the grid structure is coated with a layer of fibroin solution for moisture sensing and as a friction layer.
The independent sliding type friction nano generator can collect mechanical energy sliding in any direction, as shown in fig. 1-3, and the basic working principle is as follows:
when the sliding block 202 slides along the direction of the X axis, two electrodes and a fixed friction layer of the friction nanometer generator are formed by adjacent odd-numbered grids 301 and even-numbered grids 302, and the odd-numbered grids 301 and the even-numbered grids 302 are respectively connected to be the same electrode. When the free slide block 202 slides along one direction, the slide block 202 can realize quick switching between odd number bits and even number bits, and the quick charge transfer of the friction nano generator is realized. The sliding blocks 202 adopt a grid structure, all grids of the sliding blocks 202 can be simultaneously contacted with all odd-numbered grids 301 or even-numbered grids 302 of the fixed block 201, when the sliding blocks slide towards a certain direction, all grids of the sliding blocks 202 are contacted with the odd-numbered grids 301 or even-numbered grids 302 of the fixed block 201, positive charges on the sliding blocks 202 are kept unchanged, when the sliding blocks 202 slide on the fixed block 201, the charges on odd-numbered and even-numbered electrodes on the fixed block 201 are quickly transferred, friction power generation is realized by a plurality of adjacent grids at the same time, and the utilization rate and the output capacity can be improved.
When the sliding block 202 slides along the Y-axis direction, all the first comb-tooth grids 305 and the second comb-tooth grids 306 constitute the friction layer and the electrode of the independent sliding block 202 type friction nano-generator. When the slider 202 slides from S1 to S2, the second comb-shaped grid 306 of S1 and the first comb-shaped grid 305 of S2 constitute the friction layer and the electrode of the independent slider 202 type friction nano-generator. The effective area of the friction layer is relatively large when sliding along the Y-axis, the output energy density is high, and the sliding of the slider 202 in the lateral and longitudinal directions can be decomposed according to the vectorial property of the direction when sliding randomly.
Example 2: a flexible directly powered microsystem, as shown in fig. 2 and 3, comprises a micro energy harvesting device and a flexible energy management unit which are cascaded, wherein the flexible energy management unit has a small size. The micro-energy collection device and the flexible energy management unit are integrated on the same flexible substrate through a Flexible Printed Circuit Board (FPCB) technology or a screen printing technology, and the micro-energy collection device is the omnidirectional sliding energy collection device recorded in the embodiment 1.
As shown in fig. 4, the flexible energy management unit includes a rectification module 101, a peak detection module 102, a switch module 103, and a voltage reduction module 104, where the switch module 103 is connected in series between the rectification module 101 and the voltage reduction module 104.
The rectifying module 101 is configured to convert the ac pulse voltage output by the micro energy collecting device into a dc pulse voltage and output the dc pulse voltage. The rectification module 101 adopts a full-wave rectification rectifier bridge, and is directly connected with different electrodes of the friction nano-generator.
As shown in fig. 4 and 5, the peak detection module 102 includes a voltage comparator, a logic circuit, and an RC differentiating circuit, and is configured to perform pulse detection on the output dc pulse voltage and send a switch control signal to the switch module 103 when the dc pulse voltage reaches a peak value. Wherein the differential circuit comprises a resistor R with a resistance value of 1-100M omega1And a capacitor C with a capacitance value of 0.1-10pF1. The voltage comparator is a low-power zero-crossing comparator and is used for detecting the peak value of the output voltage of the friction nano generator. The logic circuit module comprises two inverters, an AND gate And a resistor R with a resistance value of 0.1-10M omega2And a capacitor C with a capacitance value of 1-10pF2。
As shown in fig. 5, the RC differentiating circuit can obtain the pulse slope, the slope is 0 when the peak value is reached, the voltage comparator outputs a low level, the low level is converted into a high level through the first inverter Inv1, the output of the first inverter Inv1 passes through an RC delay circuit And the second inverter Inv2, the outputs of the two inverters are input to the And gate And, therefore, the pulse width of the output of the comparator can be reduced, the pulse width is also the delay time of the delay circuit, And the switch can detect the voltage peak value more accurately. Time constant of differentiator (τ ═ C)1R1) Must be greater than each peak of the TENG voltageDuration (t)wτ ≧ 5) is much smaller. When the comparator is switched to the 'high' state, the comparator is composed of an inverter, an AND gate and an RC delay circuit (C)2-R2) The constituent delay units will generate a control time T. T is mainly determined by an RC delay circuit, and the expression formula of the RC delay circuit is T ≈ R2C2ln((Vi-Ve)/Ve). Since the logic circuit voltage is Vcc, Vi is Vcc, Ve is 0.3Vcc, and T is approximately equal to 0.36R2C2。
As shown in fig. 5, the switching module 103 is configured to conduct the rectifying module 101 and the voltage-reducing module 104 after being turned on according to a switching control signal to achieve maximum energy transfer, and the switching module 103 is a switching MOS transistor.
As shown in fig. 5 and fig. 6, the step-down module 104 is configured to step down the peak voltage output after the switch module 103 is turned on and then output the peak voltage. The voltage-reducing module 104 is a Buck circuit composed of a diode D, an inductor and a capacitor C3The inductor, the switch and the generator TENG form a loop at the moment of closing the switch. When the switch is turned off, an inductive current is generated due to the inductive effect, and the diode D and the capacitor C3Form a loop to realize the capacitance C3And (6) charging. The flexible energy management unit module of the voltage reduction circuit with the single inductor has the advantages of small size, soft substrate and the like, and is convenient to integrate with electronic equipment and to wear. The inductor is a patch power inductor, the inductance value of the inductor is 10 muH-10H, the diode D is a rectifier diode 1N4007, and the capacitor C is3The capacity value of (A) is 1 muF-10F.
Example 3: a flexible direct power supply microsystem, embodiment 3 differs from embodiment 2 in that: the bottom surface of the flexible substrate is covered with a PVDF piezoelectric film, and the PVDF piezoelectric film is cascaded with a flexible energy management unit (not shown in the figure). The flexible substrate is provided with a thermoelectric acquisition layer which is cascaded with a flexible energy management unit (not shown in the figure). The piezoelectric and thermoelectric energy collector is integrated, so that multifunctional composite energy collection is realized, and humidity sensing is realized.
Experimental verification and analysis:
the output voltage values of the omnidirectional sliding energy collecting device in example 1 were tested by sliding friction in the X-axis direction, the Y-axis direction, and any direction, and the test results are shown in fig. 7. Most of mechanical motions in daily life are irregular, the designed friction mode of most of current friction nano generators is regular, the friction mechanical energy sliding in any direction can be collected through the symmetrical grid-shaped structure of the array, and the irregular mechanical energy can be collected with high efficiency.
The direct power supply graph of the flexible direct power supply micro-system in the example 2 for supplying power to a 10 muF electrolyte capacitor is shown in FIG. 8. The system directly charges the energy storage capacitor to 22V in about 3.5s, and has high charging efficiency.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. Omnidirectional sliding energy collection device, characterized by includes:
at least one omnidirectional energy collection unit;
the omnidirectional energy acquisition unit comprises a sliding block (202) and at least two fixed blocks (201) distributed in an array, wherein the sliding block (202) and any one fixed block (201) form an independent sliding type friction nano generator;
the slider (202) and the fixed block (201) are both in a grid-shaped structure, the fixed block (201) comprises a first comb-tooth-shaped grid (305) and a second comb-tooth-shaped grid (306) which are symmetrical, the first comb-tooth-shaped grid (305) and the second comb-tooth-shaped grid (306) are both composed of an odd-numbered grid (301) and an even-numbered grid (302) which are alternately arranged, and the odd-numbered grid (301) and the even-numbered grid (302) are respectively connected with a positive electrode and a negative electrode;
when the sliding block (202) slides along the X-axis direction, the odd-numbered grids (301) and the even-numbered grids (302) form the electrode of the friction nano generator;
when the sliding block (202) slides along the Y-axis direction, the first comb-tooth-shaped grid (305) and the second comb-tooth-shaped grid (306) form the electrode of the friction nano-generator.
2. The omnidirectional sliding energy harvesting device according to claim 1, wherein said fixed block (201) is provided with two first electrodes (303), two second electrodes (304);
the two first electrodes (303) are positioned at the opposite edges of the first comb-tooth-shaped grid (305) and the second comb-tooth-shaped grid (306) and are connected with the corresponding odd-numbered grids (301);
the two second electrodes (304) are positioned at the back edges of the first comb-tooth-shaped grid (305) and the second comb-tooth-shaped grid (306) and are connected with the corresponding even-numbered grids (302).
3. The omni-directional sliding energy harvesting device according to claim 1, wherein the fixed block (201) and/or the sliding block (202) is a flexible substrate polyimide film PI (204), and the friction surface of the fixed block (201) is coated with a flexible polytetrafluoroethylene film PTFE (203).
4. The omni-directional sliding energy harvesting device according to claim 1, wherein the surface of the grating structure is coated with a fibroin solution layer for moisture sensing and/or as a friction layer.
5. A flexible direct power supply microsystem is characterized by comprising a micro energy acquisition device and a flexible energy management unit which are cascaded, wherein the micro energy acquisition device and the flexible energy management unit are integrated on the same flexible substrate through a Flexible Printed Circuit Board (FPCB) technology or a screen printing technology, and the micro energy acquisition device is the omnidirectional sliding energy acquisition device as claimed in any one of claims 1 to 4.
6. The flexible direct power supply microsystem as claimed in claim 5, wherein the flexible energy management unit comprises a rectification module (101), a peak detection module (102), a switch module (103) and a voltage reduction module (104), wherein the switch module (103) is connected in series between the rectification module (101) and the voltage reduction module (104);
the rectifying module (101) is used for converting the alternating current pulse voltage output by the micro energy collecting device into direct current pulse voltage and then outputting the direct current pulse voltage;
the peak value detection module (102) comprises a voltage comparator, a logic circuit and an RC differential circuit, and is used for carrying out pulse detection on the output direct current pulse voltage and sending a switch control signal to the switch module (103) when the direct current pulse voltage reaches a peak value;
the switch module (103) is used for conducting the rectifying module (101) and the voltage reduction module (104) after being closed according to the switch control signal so as to realize maximum energy transfer;
and the voltage reduction module (104) is used for reducing the peak voltage output after the switch module (103) is conducted and then outputting the reduced peak voltage.
7. The flexible direct power supply microsystem as claimed in claim 5, wherein the flexible substrate is coated with a PVDF piezoelectric film on the bottom surface, and the PVDF piezoelectric film is cascaded with the flexible energy management unit.
8. The flexible direct power microsystem as claimed in claim 5, wherein the flexible substrate is provided with a thermoelectric collection layer, the thermoelectric collection layer being cascaded with the flexible energy management unit.
9. An electronic device comprising at least one omni-directional sliding energy harvesting device as claimed in any of claims 1 to 4.
10. An electronic device comprising at least one flexible direct current powered microsystem as claimed in claim 5.
CN202010639267.0A 2020-07-06 2020-07-06 Omnidirectional sliding energy acquisition device, flexible direct power supply micro system and electronic equipment Active CN111740637B (en)

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