Micro-magnetic passive self-powered mechanism

Abstract

The invention discloses a micro-magnetic passive self-powered mechanism, and relates to the technical field of self-powered, the micro-magnetic passive self-powered mechanism comprises an outer shell and a self-powered assembly, the outer shell is used for outputting alternating current under the action of an alternating magnetic field in a closed cavity of an automobile battery pack, the self-powered assembly is installed in the outer shell, and the self-powered assembly is electrically connected with the outer shell. The self-powered assembly can carry out nanometer friction power generation in the outer shell, and the self-powered assembly is used for being electrically connected with the micro electro mechanical system. The power supply requirement of the micro electro mechanical system in the closed cavity of the automobile battery pack can be met, and long-term stable power supply is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of self-powered technologies, and particularly to a micro-magnetic self-powered mechanism without a power source. Background Art

[0002] When a micro-electromechanical system monitors an automotive battery pack, stable power supply is usually required. The weak alternating magnetic field inside the battery pack is used as a power source to drive a composite blade for friction power generation.

[0003] Currently, the power supply methods used are all active power sources. When an active power source supplies power to a micro-electromechanical system inside a battery pack, the following obstacles generally exist:

[0004] (1) Directly powering with an automotive battery pack will greatly change the automotive power supply system and cannot stably adapt to the power supply requirements of the micro-electromechanical system;

[0005] (2) The service life of a micro-battery is very limited and cannot supply power to the monitoring system for a long time. Therefore, the micro-battery needs to be frequently replaced, and the replacement process of the micro-battery inside the battery pack is complex and inconvenient to use. Summary of the Invention

[0006] The purpose of the present invention is to provide a micro-magnetic self-powered mechanism without a power source to solve the problems existing in the above-mentioned prior art, meet the power supply requirements of the micro-electromechanical system in the closed cavity of the automotive battery pack, and achieve long-term stable power supply.

[0007] To achieve the above purpose, the present invention provides the following solutions:

[0008] The present invention provides a micro-magnetic self-powered mechanism without a power source, including an outer housing and a self-powered component. The outer housing is used to output alternating current under the action of the alternating magnetic field in the closed cavity of the automotive battery pack. The self-powered component is installed inside the outer housing, and the self-powered component is electrically connected to the outer housing. The self-powered component can perform nano-friction power generation inside the outer housing, and the self-powered component is used to be electrically connected to a micro-electromechanical system.

[0009] Preferably, there are two self-powered components. The two self-powered components are arranged along the axial direction of the outer housing, and the two self-powered components are symmetrically arranged.

[0010] Preferably, the self-powered component includes a magnetic flux dynamic enhancer, a bionic magnetic driving force accelerator, and a nano-friction power generation element. The current input end of the magnetic flux dynamic enhancer is connected to the outer housing, and the magnetic flux dynamic enhancer can strengthen the alternating magnetic field in the closed cavity of the automotive battery pack. The bionic magnetic driving force accelerator can generate resonance under the action of the strengthened alternating magnetic field and drive the nano-friction power generation element to rotate. When the nano-friction power generation element rotates, it can generate nano-friction power, and the current output end of the nano-friction power generation element is used to connect to the microelectromechanical system.

[0011] Preferably, the bionic magnetic driving force accelerator includes an induction element and a plurality of transmission elements connected in series. The induction element can rotate under the action of the magnetic flux dynamic enhancer, and the induction element is connected to the transmission element at one end, and the transmission element at the other end is connected to the nano-friction power generation element.

[0012] Preferably, there are three transmission elements, and the transmission elements are a gear set. From the direction close to the induction element to the direction away from it, the three transmission elements are the first-stage transmission element, the second-stage transmission element, and the third-stage transmission element in sequence. The first-stage transmission element is connected to the induction element, and the third-stage transmission element is connected to the nano-friction power generation element.

[0013] Preferably, the first-stage transmission element includes a first-stage tooth ring, a first-stage intermediate gear, and three first-stage outer gears. The first-stage tooth ring is connected to the output gear of the induction element. The three first-stage outer gears are all meshed with the inner wall of the first-stage tooth ring, and the three first-stage outer gears do not mesh with each other. The three first-stage outer gears are arranged around the outer circumference of the first-stage intermediate gear, and each first-stage outer gear is meshed with the first-stage intermediate gear. The diameter of the first-stage intermediate gear is smaller than the diameter of the first-stage outer gear;

[0014] The second-stage transmission element includes a second-stage tooth ring, a second-stage intermediate gear, and three second-stage outer gears. The second-stage tooth ring is connected to the first-stage intermediate gear. The three second-stage outer gears are all meshed with the inner wall of the second-stage tooth ring, and the three second-stage outer gears are complementary and do not mesh with each other. The three second-stage outer gears are arranged around the outer circumference of the second-stage intermediate gear, and each second-stage outer gear is meshed with the second-stage intermediate gear. The diameter of the second-stage intermediate gear is smaller than the diameter of the second-stage outer gear;

[0015] The third-stage transmission element includes a third-stage main gear and a third-stage sub-gear. The third-stage main gear is coaxially connected to the second-stage intermediate gear, and the outer peripheries of the third-stage main gear and the third-stage sub-gear are meshed. The diameter of the third-stage main gear is greater than the diameter of the third-stage sub-gear. The third-stage sub-gear is coaxially connected to the power input end of the nano-friction power generation element.

[0016] Preferably, the transmission ratio of the first-stage transmission element is 5.8, the transmission ratio of the second-stage transmission element is 5.3, and the transmission ratio of the third-stage transmission element is 1.5.

[0017] Preferably, the nano-friction power generation element is connected to the bionic magnetic driving force accelerator through a power transmission element; the nano-friction power generation element includes a connecting shaft, a friction box and a plurality of composite blades, the friction box can be detachably installed in the outer shell, the connecting shaft and the plurality of composite blades are both located inside the friction box, and one end of the connecting shaft passes through the friction box and is connected to the power output end of the bionic magnetic driving force accelerator, the plurality of composite blades are all sleeved on the outer periphery of the connecting shaft and arranged along the axial direction of the connecting shaft, the connecting shaft can drive each of the composite blades to rotate, and enable the composite blades to perform nano-friction power generation with the inside of the friction box.

[0018] Preferably, the composite blade includes three layers of blade units, and the three layers of blade units are respectively a first blade unit, a second blade unit and a third blade unit, and the first blade unit and the third blade unit are respectively installed on both sides of the second blade unit; the friction box includes a plurality of box units arranged in sequence along the axial direction of the connecting shaft, and adjacent box units are internally connected, and the first side of each box unit is open, and the second side of each box unit is provided with a through hole, the end face of the first blade unit can contact and rub the side wall of the second side of the box unit, the outer periphery of the second blade unit can contact and rub the inner wall of the box unit, and the outer periphery of the third blade unit can contact and rub the inner wall of the through hole on the friction box.

[0019] Preferably, the outer shell includes an amorphous alloy layer and a single crystal layer, the single crystal layer is connected to the periphery of the amorphous alloy layer, and the amorphous alloy layer is used to generate periodic magnetostrictive deformation under the action of an alternating magnetic field in a closed cavity of a vehicle battery pack, and transmit the periodic magnetostrictive deformation to the single crystal layer to induce asymmetric distortion of the lattice on the single crystal layer to form an electric polarization effect, and the bound charges inside the crystal of the single crystal layer form an electric potential difference on the surface of the single crystal layer, and the single crystal layer is connected to the current input terminal of the self-powered component.

[0020] The present invention has achieved the following technical effects compared with the prior art:

[0021] The micro-magnetic self-powered mechanism provided by the present invention includes a housing and a self-powered component. The housing is used to output alternating current under the action of an alternating magnetic field in the closed cavity of an automotive battery pack. The self-powered component is installed in the housing and is electrically connected to the housing. The self-powered component can generate nano-friction electricity in the housing and is used to be electrically connected to a microelectromechanical system. Furthermore, in a narrow environment with a weak magnetic field, as a self-powered structure of a terminal device, a weak magnetic field is used as a power source outside the battery pack to realize magneto-induced piezovoltage friction coupling power generation. After rectification and voltage regulation, it is transmitted to the microelectromechanical system, which can meet the power supply requirements of the microelectromechanical system in the closed cavity of the automotive battery pack and achieve long-term stable power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the micro-magnetic self-powered mechanism in the present invention;

[0024] Figure 2 It is a partial cross-sectional view of the micro-magnetic self-powered mechanism in the present invention;

[0025] Figure 3 It is a schematic internal structure diagram of the micro-magnetic self-powered mechanism in the present invention;

[0026] Figure 4 It is a schematic internal structure diagram of the bionic magnetic driving force accelerator in the present invention;

[0027] Figure 5 It is a cross-sectional view of the nano-friction power generation element in the present invention;

[0028] Figure 6 It is a cross-sectional view of the friction box body in the present invention;

[0029] Figure 7 It is a connection schematic diagram of the connecting shaft and multiple composite blades in the present invention;

[0030] Figure 8 It is a schematic structural diagram of the composite blade at one angle in the present invention;

[0031] Figure 9 It is a schematic structural diagram of the composite blade at another angle in the present invention;

[0032] In the figure: 1-outer shell, 101-heat dissipation hole, 102-wire hole, 2-magnetic flux dynamic enhancer, 3-bionic magnetic driving force accelerator, 301-induction element, 302-first stage outer gear, 303-first stage intermediate gear, 304-second stage outer gear, 305-second stage intermediate gear, 306-third stage main gear, 307-third stage sub-gear, 4-nano friction power generation element, 401-box unit, 402-connecting shaft, 403-composite blade, 404-through hole, 405-first blade unit, 406-second blade unit, 407-third blade unit, 5-power transmission element. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The purpose of the present invention is to provide a micro-magnetic passive self-powering mechanism to solve the problems existing in the prior art, meet the power supply requirements of the micro-electromechanical system in the closed cavity of the automobile battery pack, and achieve long-term stable power supply.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figures 1-9 As shown, this embodiment provides a micro-magnetic passive self-powered mechanism, including an outer shell 1 and a self-powered component. The outer shell 1 is used to output alternating current under the action of an alternating magnetic field in a closed cavity of a vehicle battery pack. The self-powered component is installed in the outer shell 1, and the self-powered component is electrically connected to the outer shell 1. The self-powered component can perform nano-friction power generation in the outer shell 1, and the self-powered component is used to be electrically connected to a micro-electromechanical system, and can be used as a self-powered structure of a terminal device in a narrow environment of a weak magnetic field. The weak magnetic field is used as a power source outside the battery pack to realize magneto-pressure variable friction coupling power generation, which is transmitted to the micro-electromechanical system after rectification and voltage stabilization, and can meet the power supply needs of the micro-electromechanical system in the closed cavity of the vehicle battery pack, and realize long-term stable power supply.

[0037] Specifically, there are two self-powered components, which are arranged along the axial direction of the outer shell 1 and are symmetrically arranged. Those skilled in the art can also adaptively adjust the number of self-powered components according to actual needs.

[0038] A plurality of heat dissipation holes 101 are further provided at both ends of the side wall of the outer shell 1 , and a wire hole 102 is further provided in the middle of the side wall of the outer shell 1 .

[0039] The self-powered component includes a magnetic flux dynamic enhancer 2, a bionic magnetic driving force accelerator 3 and a nano friction power generation element 4. The current input end of the magnetic flux dynamic enhancer 2 is connected to the outer shell 1, and the magnetic flux dynamic enhancer 2 can enhance the alternating magnetic field in the closed cavity of the automobile battery pack. The bionic magnetic driving force accelerator 3 can generate resonance under the action of the enhanced alternating magnetic field and drive the nano friction power generation element 4 to rotate, thereby converting magnetic energy into a mechanical power source. The nano friction power generation element 4 can generate nano friction power when rotating, and the current output end of the nano friction power generation element 4 is used to connect the micro-electromechanical system to achieve self-power supply. Among them, the outer shell 1 and the magnetic flux dynamic enhancer 2, the outer shell 1 and the bionic magnetic driving force accelerator 3, and the outer shell 1 and the nano friction power generation element 4 are all connected through a card slot.

[0040] The alternating current generated in this embodiment flows in through the wire, and the electromagnetic induction principle is used to drive the special magnetic core structure of the magnetic flux dynamic enhancer 2 to construct a high magnetic permeability closed loop. Through the synergistic effect of the multi-layer spatial arrangement array of magnetic permeability materials in the magnetic flux dynamic enhancer 2, the directional aggregation of magnetic lines of force and the doubling of energy density are achieved, forming an enhanced alternating magnetic field and amplifying it several times, thereby converting the available magnetic energy into a mechanical power source.

[0041] The bionic magnetic driving force accelerator 3 includes an induction element 301 and a plurality of transmission elements connected in sequence, wherein the induction element 301 can rotate under the action of the magnetic flux dynamic enhancer 2, and the induction element 301 is connected to the transmission element at one end, and the transmission element at the other end is connected to the nano friction power generation element 4. The bionic magnetic driving force accelerator 3 generates resonance under the action of the periodic magnetic force of the enhanced alternating magnetic field, drives the nano friction power generation element to rotate as the power input source of the device, and realizes the conversion of weak electromagnetic energy into considerable mechanical energy.

[0042] There are three transmission elements, and the transmission elements are gear sets. In the direction from approaching to away from the sensing element 301, the three transmission elements are respectively the first-stage transmission element, the second-stage transmission element and the third-stage transmission element. The first-stage transmission element is connected to the sensing element 301, and the third-stage transmission element is connected to the nano-friction power generation element 4.

[0043] The first - stage transmission element is a planetary carrier structure, which adopts a conjugate meshing topology structure to reduce energy loss. Specifically, it includes a first - stage ring gear, a first - stage intermediate gear 303, and three first - stage external gears 302. The first - stage ring gear is connected to the output gear of the induction element 301. The three first - stage external gears 302 are all meshed with the inner wall of the first - stage ring gear, and the three first - stage external gears 302 do not mesh with each other. The three first - stage external gears 302 are arranged around the outer circumference of the first - stage intermediate gear 303, and each first - stage external gear 302 is meshed with the first - stage intermediate gear 303. Thus, the first - stage ring gear is driven to rotate by the induction element 301, the first - stage ring gear drives the three first - stage external gears 302 to rotate, the three first - stage external gears 302 drive the first - stage intermediate gear 303 to rotate. The diameter of the first - stage intermediate gear 303 is smaller than that of the first - stage external gear 302, so speed increase can be achieved.

[0044] The second - stage transmission element is a planetary carrier structure, which adopts a conjugate meshing topology structure to reduce energy loss. Specifically, it includes a second - stage ring gear, a second - stage intermediate gear 305, and three second - stage external gears 304. The second - stage ring gear is connected to the first - stage intermediate gear 303. The three second - stage external gears 304 are all meshed with the inner wall of the second - stage ring gear, and the three second - stage external gears 304 do not mesh with each other. The three second - stage external gears 304 are arranged around the outer circumference of the second - stage intermediate gear 305, and each second - stage external gear 304 is meshed with the second - stage intermediate gear 305. Thus, the second - stage ring gear is driven to rotate by the first - stage intermediate gear 303, the second - stage ring gear drives the three second - stage external gears 304 to rotate, the three second - stage external gears 304 drive the second - stage intermediate gear 305 to rotate. The diameter of the second - stage intermediate gear 305 is smaller than that of the second - stage external gear 304, so speed increase can be achieved.

[0045] The third - stage transmission element includes a third - stage main gear 306 and a third - stage auxiliary gear 307. The third - stage main gear 306 is coaxially connected to the second - stage intermediate gear 305, and the outer circumferences of the third - stage main gear 306 and the third - stage auxiliary gear 307 are meshed. Thus, the third - stage main gear 306 is driven to rotate by the second - stage intermediate gear 305, the third - stage main gear 306 drives the third - stage auxiliary gear 307 to rotate. The diameter of the third - stage main gear 306 is larger than that of the third - stage auxiliary gear 307, so speed increase can be achieved. The third - stage auxiliary gear 307 is coaxially connected to the power input end of the nano - triboelectric power generation element 4.

[0046] As a specific embodiment, the rotating connection part in the bionic magnetic driving force accelerator 3 can adopt a thrust roller bearing. The gear located at the center can adopt a gear shaft. The gear shaft is connected to the planetary carrier by a spline, and gears made of high - strength materials are used to improve the load - bearing and anti - torque capabilities, and stably output high rotational speeds safely.

[0047] The transmission ratio of the first-stage transmission element is 5.8, the transmission ratio of the second-stage transmission element is 5.3, and the transmission ratio of the third-stage transmission element is 1.5, so the total transmission ratio is as high as 1:46, which realizes the conversion of slight mechanical vibration into high-speed rotational kinetic energy and further enhances the power.

[0048] The nano-friction power generation element 4 is connected to the bionic magnetic driving force accelerator 3 through a power transmission element 5, so that the nano-friction power generation element 4 captures the power output by the bionic magnetic driving force accelerator 3 to achieve high-speed rotation. The nano-friction power generation element 4 includes a connecting shaft 402, a friction box and a plurality of composite blades 403. The friction box can be detachably installed in the outer shell 1. The connecting shaft 402 and the plurality of composite blades 403 are both located inside the friction box, and one end of the connecting shaft 402 passes through the friction box and is connected to the power output end of the bionic magnetic driving force accelerator 3. The plurality of composite blades 403 are all sleeved on the outer periphery of the connecting shaft 402 and arranged along the axial direction of the connecting shaft 402. The connecting shaft 402 can drive each composite blade 403 to rotate, and enable the composite blades 403 to perform nano-friction power generation with the inside of the friction box.

[0049] The composite blade 403 includes three layers of blade units, which are respectively a first blade unit 405, a second blade unit 406 and a third blade unit 407. The first blade unit 405 and the third blade unit 407 are respectively installed on both sides of the second blade unit 406; the friction box body includes a plurality of box body units 401 arranged in sequence along the axial direction of the connecting shaft 402, and the adjacent box body units 401 are internally connected, and the first side of each box body unit 401 is open, and the second side of each box body unit 401 is provided with a through hole 404, and the end face of the first blade unit 405 can contact and rub the end face of the box body unit 401. The side wall of the second side, the outer periphery of the second blade unit 406 can contact and rub the inner wall of the box unit 401, and the outer periphery of the third blade unit 407 can contact and rub the inner wall of the through hole 404 on the friction box, so that the three-layer blade unit and the box unit 401 form a fluorinated ethylene propylene copolymer (FEP) double electrode structure. At the same time, the friction area between the composite blade 403 and the box unit 401 is increased through the above design, that is, the contact area of ​​the two poles is increased, and it has an extremely high rotation speed, which significantly improves the power generation efficiency. After voltage stabilization and rectification to eliminate phase loss, the output DC power is stable for a long time to supply energy to the micro-electromechanical system.

[0050] The outer casing 1 includes an amorphous alloy layer and a single crystal wafer layer. The single crystal wafer layer is connected to the outer periphery of the amorphous alloy layer. The single crystal wafer layer is preferably made of a lead magnesium niobate-lead titanate material (PMN-PT). The amorphous alloy layer is used to generate periodic magnetostrictive deformations under the excitation of an alternating magnetic field in the closed cavity of the automotive battery pack, and conduct the periodic magnetostrictive deformations to the single crystal wafer layer to induce lattice asymmetric distortion on the single crystal wafer layer to form an electrode polarization effect. Based on the principle of the direct piezoelectric effect, the bound charges inside the crystal of the single crystal wafer layer form a potential difference on the surface of the single crystal wafer layer. The single crystal wafer layer is connected to the current input end of the self-powered component through a wire to output alternating current, thus avoiding the use of replaceable batteries, not requiring frequent replacement, and being able to achieve long-term power supply.

[0051] Among them, the periodic magnetostrictive deformation refers to that when the amorphous alloy layer is magnetized in an external magnetic field, both the length dimension and the volume size will change slightly, and after removing the external magnetic field, it will return to its original length or volume.

[0052] The electrode polarization effect of the lattice refers to the phenomenon that under the action of an external electric field, the lattice of a polarization material (also called a dielectric material) undergoes a slight vibration, resulting in a change in its dielectric properties.

[0053] The direct piezoelectric effect refers to the phenomenon that a crystal material generates charges under the action of an external force, which is reversible and direction-dependent. When the crystal is subjected to an external force in a fixed direction, an electrode polarization phenomenon will occur inside it, and at the same time, charges with opposite signs will be generated on two opposite surfaces; when the external force is removed, the crystal will return to the uncharged state, indicating that the direct piezoelectric effect is reversible; when the direction of the external force changes, the polarity of the charges will also change accordingly.

[0054] Through the above design in this embodiment, in the specific environment of the automotive battery pack, the unused magnetic energy can be absorbed and finally converted into electrical energy to power the microelectromechanical system, which has the environmental protection significance of resource recycling and utilization.

[0055] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A micro-magnetic self-powered mechanism, characterized in that: It includes a housing and a self-powered component. The housing is used to output alternating current under the action of an alternating magnetic field in the enclosed cavity of an automotive battery pack. The self-powered component is installed in the housing and is electrically connected to the housing. The self-powered component can generate nano-friction electricity within the housing, and the self-powered component is used to be electrically connected to a microelectromechanical system.

2. The micro-magnetic self-powered mechanism according to claim 1, characterized in that: There are two self-powered components, and the two self-powered components are arranged along the axial direction of the housing, and the two self-powered components are symmetrically arranged.

3. The micro-magnetic self-powered mechanism according to claim 1, characterized in that: The self-powered component includes a magnetic flux dynamic enhancer, a bionic magnetic driving force accelerator, and a nano-friction power generation element. The current input end of the magnetic flux dynamic enhancer is connected to the housing, and the magnetic flux dynamic enhancer can strengthen the alternating magnetic field in the enclosed cavity of the automotive battery pack. The bionic magnetic driving force accelerator can generate resonance under the action of the strengthened alternating magnetic field and drive the nano-friction power generation element to rotate. When the nano-friction power generation element rotates, it can generate nano-friction electricity, and the current output end of the nano-friction power generation element is used to connect to the microelectromechanical system.

4. The micro-magnetic self-powered mechanism according to claim 3, characterized in that: The bionic magnetic driving force accelerator includes an induction element and a plurality of transmission elements that are sequentially connected in a transmission manner. The induction element can rotate under the action of the magnetic flux dynamic enhancer, and the induction element is connected to the transmission element at one end. The transmission element at the other end is connected to the nano-friction power generation element.

5. The micro-magnetic self-powered mechanism according to claim 4, wherein: There are three transmission elements, and the transmission elements are gear sets. From the direction close to the induction element to the direction far from it, the three transmission elements are the first-stage transmission element, the second-stage transmission element, and the third-stage transmission element in sequence. The first-stage transmission element is connected to the induction element, and the third-stage transmission element is connected to the nano-friction power generation element.

6. The micro-magnetic self-powered mechanism according to claim 5, characterized in that: The first-stage transmission element includes a first-stage tooth ring, a first-stage intermediate gear, and three first-stage outer gears. The first-stage tooth ring is connected to the output gear of the induction element. The three first-stage outer gears are all meshed with the inner wall of the first-stage tooth ring, and the three first-stage outer gears are not meshed with each other. The three first-stage outer gears are arranged around the outer circumference of the first-stage intermediate gear, and each first-stage outer gear is meshed with the first-stage intermediate gear. The diameter of the first-stage intermediate gear is smaller than the diameter of the first-stage outer gear. The second-stage transmission element includes a second-stage tooth ring, a second-stage intermediate gear, and three second-stage outer gears. The second-stage tooth ring is connected to the first-stage intermediate gear. The three second-stage outer gears are all meshed with the inner wall of the second-stage tooth ring, and the three second-stage outer gears are complementarily meshed. The three second-stage outer gears are arranged around the outer circumference of the second-stage intermediate gear, and each second-stage outer gear is meshed with the second-stage intermediate gear. The diameter of the second-stage intermediate gear is smaller than the diameter of the second-stage outer gear. The third-stage transmission element includes a third-stage main gear and a third-stage sub-gear. The third-stage main gear is coaxially connected to the second-stage intermediate gear, and the outer peripheries of the third-stage main gear and the third-stage sub-gear are meshed. The diameter of the third-stage main gear is greater than the diameter of the third-stage sub-gear. The third-stage sub-gear is coaxially connected to the power input end of the nano-friction power generation element.

7. The micro-magnetic self-powered mechanism according to claim 6, wherein: The transmission ratio of the first-stage transmission element is 5.8, the transmission ratio of the second-stage transmission element is 5.3, and the transmission ratio of the third-stage transmission element is 1.

5.

8. The micro-magnetic self-powered mechanism according to claim 3, characterized in that: The nano-friction power generation element is connected to the bionic magnetic driving force accelerator through a power transmission element; the nano-friction power generation element includes a connecting shaft, a friction box and a plurality of composite blades, the friction box can be detachably installed in the outer shell, the connecting shaft and the plurality of composite blades are both located inside the friction box, and one end of the connecting shaft passes through the friction box and is connected to the power output end of the bionic magnetic driving force accelerator, the plurality of composite blades are all sleeved on the outer periphery of the connecting shaft and arranged along the axial direction of the connecting shaft, the connecting shaft can drive each of the composite blades to rotate, and enable the composite blades to perform nano-friction power generation with the inside of the friction box.

9. The micro-magnetic self-powered mechanism according to claim 8, characterized in that: The composite blade includes three layers of blade units, which are respectively a first blade unit, a second blade unit and a third blade unit, and the first blade unit and the third blade unit are respectively installed on both sides of the second blade unit; the friction box includes a plurality of box units arranged in sequence along the axial direction of the connecting shaft, and the adjacent box units are internally connected, and the first side of each of the box units is open, and the second side of each of the box units is provided with a through hole, the end face of the first blade unit can contact and rub the side wall of the second side of the box unit, the outer periphery of the second blade unit can contact and rub the inner wall of the box unit, and the outer periphery of the third blade unit can contact and rub the inner wall of the through hole on the friction box.

10. The micro-magnetic self-powered mechanism according to claim 1, characterized in that: The outer shell includes an amorphous alloy layer and a single crystal layer, the single crystal layer is connected to the periphery of the amorphous alloy layer, and the amorphous alloy layer is used to generate periodic magnetostrictive deformation under the action of an alternating magnetic field in a closed cavity of a vehicle battery pack, and transmit the periodic magnetostrictive deformation to the single crystal layer to induce asymmetric distortion of the lattice on the single crystal layer to form an electric polarization effect, and the bound charges inside the crystal of the single crystal layer form an electric potential difference on the surface of the single crystal layer, and the single crystal layer is connected to the current input end of the self-powered component.

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