Wearable three-stable-state nanometer power generation device
By adopting a tri-stable nanopower generator in the friction generator and using a negative stiffness structure composed of magnet group and spring, the problem of insufficient energy capture efficiency in the low-frequency vibration environment of the existing friction generator is solved, and efficient vibration energy capture and electrical energy conversion are achieved.
Patent Information
- Application Number
- CN202422139375.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The existing friction generators have shortcomings in vibration energy capture efficiency, especially in low-frequency vibration environments, which are difficult to efficiently capture energy.
The three-steady state nano-power generation device is adopted to achieve the system spanning more unstable equilibrium points in one cycle through the negative stiffness structure composed of magnet group and spring, and generate large amplitude and high velocity inter-well motion response, thereby improving the vibration energy capture efficiency.
Compared with bistable nanogenerators and other traditional generators, the tristeady nanogenerator device shows more efficient energy capture efficiency in low-frequency vibration energy capture, achieving efficient conversion of mechanical energy into electrical energy.
Smart Images
Figure CN222776131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of energy technology related to nanotechnology, and in particular to a wearable tristable nano power generation device capable of improving the energy capture efficiency of a nano friction generator. Background Art
[0002] The Internet of Things connects various objects with the Internet through information sensing devices, and plays a very important role in many aspects. The application of Internet of Things technology depends on many sensor network nodes. Therefore, being able to develop stable, durable and economical sensor nodes has become an important node to break through the bottleneck of the development of the Internet of Things.
[0003] At present, the traditional energy supply methods are access to the power grid and carrying batteries, but both have their own defects. The former is expensive, and the latter has a complicated recycling process. Based on the fact that there are many types of renewable energy in the environment where the IoT sensor network nodes are located, many energy capture technologies have been studied one after another, such as the friction generator with a bistable mechanical mechanism that introduces a negative stiffness mechanism. Among them, the bistable state, as a typical nonlinear system, is mainly composed of a negative stiffness mechanism. From the perspective of system stability, there are two stable states, so it is called a bistable state; from the perspective of energy, the bistable system has an unstable equilibrium point and two stable equilibrium points, and the potential energy difference between the two equilibrium points is a potential energy barrier. When the kinetic energy of the system is large enough, it will periodically cross the unstable equilibrium point and oscillate periodically between the two stable equilibrium points. At this time, the system can exhibit periodic well-to-well motion, which can convert small-amplitude and low-speed vibration excitation into large-amplitude and high-speed motion response. Based on this, the bistable system can be widely used in the field of vibration energy capture. The negative stiffness mechanism is a specially designed mechanical structure, which is characterized by exhibiting opposite deformation behavior to external forces within a certain range, that is, when external forces are applied to the negative stiffness mechanism, it will exhibit deformation opposite to the external forces, and this characteristic can be used to realize a bistable mechanical mechanism. Introducing the negative stiffness mechanism into the friction generator can realize a bistable mechanical mechanism, thereby improving the performance and efficiency of the friction generator.
[0004] Since the friction generator converts energy in the form of friction and mechanical vibration generated by mechanical movement into electrical energy, after introducing a negative stiffness mechanism to realize a bistable mechanical mechanism, the friction generator can effectively convert the mechanical energy in the deformation and recovery process into electrical energy when the external force changes, thereby improving the energy conversion efficiency and performance stability. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a tristable nano power generation device. The device is based on the principle that the existing bistable device can obtain a large and high-speed motion response during periodic well-to-well motion, and is expanded and innovated into a tristable device using a magnet group and a spring, so that the system can cross more unstable equilibrium points in one cycle to generate a large-value, high-speed well-to-well motion response to improve the vibration energy capture efficiency of the friction generator.
[0006] The nanogenerator is a nanogenerator based on regular zinc oxide nanowires, which converts mechanical energy into electrical energy within the nanometer range. The utility model adopts a planar sliding friction nanogenerator, which utilizes two materials with different electron binding abilities (Cu-FEP-Cu), and gains and loses electrons when in contact with each other to achieve charge transfer, thereby generating a micro motor with current in the external circuit.
[0007] The technical solution adopted by the utility model to solve the technical problem is: a wearable tristable nano power generation device, including a soft cushion and a shell, the shell including a base, a guide rail is provided in the middle of the upper inner part of the base, a slider is provided on the guide rail, both ends of the slider are connected to the base through a spring and a spring sleeve respectively, a Cu-FEP film is provided in the middle of the inner bottom of the base, two groups of fixed magnets are provided on both sides of the inner bottom of the base respectively, the N and S poles of the fixed magnets are in the same direction, a sliding magnet is provided at the bottom of the slider, the N and S poles of the sliding magnet are in opposite directions to the N and S poles of the fixed magnet, a Cu film is provided on the surface of the sliding magnet, and the Cu-FEP film is in contact with the Cu film to form a Cu-FEP-Cu film.
[0008] Furthermore, the fixed magnet is embedded in a magnet housing, and the magnet housing is fixed to the inner bottom of the base through a magnet support and bolts.
[0009] Furthermore, the sliding magnet is embedded in a magnet housing, and the magnet housing is fixed to the bottom of the sliding block through a magnet support and bolts.
[0010] Furthermore, the magnet support includes a hollow clamping component and a triangular bracket component, the hollow clamping component passes through the baffle of the triangular bracket component, and bolt mounting holes are provided on the baffle of the hollow clamping component and the triangular bracket component; when the bolt is tightened, the hollow clamping component and the baffle of the triangular bracket component are relatively close, so that the hollow clamping component can clamp the magnet housing from four directions to fully constrain it; when the bolt is loosened, the hollow clamping component shrinks outward and the magnet housing is not clamped, at which time the magnet housing can be taken out and related work can be done, such as replacing the original fixed magnet.
[0011] Furthermore, an external power device is provided between the Cu-FEP film and the Cu film.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] The utility model combines the energy-capturing structure of the nanogenerator and innovatively constructs a negative stiffness structure tristable nanogenerator low-frequency vibration energy capture system composed of a magnet group and a spring. Due to the existence of the potential energy well, the device has a more efficient energy capture efficiency than the bistable nanogenerator and other traditional generators, and realizes the efficient capture of low-frequency vibration energy.
[0014] The utility model utilizes the tristable characteristics of nanomaterials to effectively capture and convert external mechanical energy into electrical energy. In terms of functionality, it has very broad application prospects in the future, such as: self-powered sensor networks, the tristable nanogenerator can be integrated with various sensors, such as temperature, humidity, pressure, vibration sensors, etc., to provide self-powered capabilities for IoT devices, which can greatly reduce dependence on batteries, extend the service life of the equipment, and reduce maintenance costs; wearable devices, in the field of wearable technology, the utility model can be used for health monitoring equipment, smart textiles and motion trackers, etc., by collecting the tiny movements and biomechanical energy of the human body to provide continuous power for these devices; space exploration, the tristable nanogenerator can be used as the main or auxiliary energy source for satellites and space probes, especially for deep space missions within the solar system, because they can work without direct exposure to sunlight; medical equipment, in the medical field, the utility model can be used for miniature medical implants, such as pacemakers, drug delivery systems and implantable sensors, to provide a long-lasting power solution without frequent battery replacement. At the same time, with the continuous advancement of nanotechnology and materials science, the performance of the tri-stable nanogenerator energy-harvesting system will be further improved, and its application scope will continue to expand, making important contributions to the development of sustainable energy and self-powered technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is an overall schematic diagram of the wearable tristable nano power generation device of the utility model;
[0016] Figure 2 This is a schematic diagram of the partial structure of the outer shell of the wearable tri-stable nano power generation device of the utility model;
[0017] Figure 3 This is a schematic diagram of the internal structure of the shell of the wearable tri-stable nano power generation device of the utility model;
[0018] Figure 4 This is a schematic diagram of the potential energy function of the wearable tristable nano power generation device of the utility model;
[0019] Figure 5 This is a schematic diagram of the connection between the spring and the slider of the wearable tristable nano power generation device of the utility model;
[0020] Figure 6 This is a schematic diagram of the installation of the magnet housing of the wearable tri-stable nano power generation device of the utility model;
[0021] Figure 7 Schematic diagram of three states of the wearable tristable nano power generation device of the utility model;
[0022] Figure 8 This is a schematic diagram of energy collection of the wearable tri-stable nano power generation device of the utility model;
[0023] Description of reference numerals in the figures:
[0024] 1. Spring; 2. Cu-FEP film; 3. Guide rail; 4. Sliding magnet; 5. Magnet housing; 6. Fixed magnet; 7. Slider; 8. Spring sleeve; 9. Magnet support; 10. Bolt; 11. Soft pad; 12. Housing; 13. Cu film; 14. External electrical device. DETAILED DESCRIPTION
[0025] The following is a clear and complete description of the technical solution of the utility model in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Referring to the accompanying drawings, a wearable tristable nano power generation device includes a cushion 11 and a shell 12, wherein the shell 12 includes a base, a guide rail 3 is provided in the middle of the upper inner portion of the base, a slider 7 is provided on the guide rail 3, and both ends of the slider 7 are connected to the base through a spring 1 and a spring sleeve 8, respectively. A Cu-FEP film 2 is provided in the middle of the inner bottom of the base, and two groups of fixed magnets 6 are provided on both sides of the inner bottom of the base, respectively, and the N and S poles of the fixed magnets 6 are in the same direction. A sliding magnet 4 is provided at the bottom of the slider 7, and the N and S poles of the sliding magnet 4 are opposite to the N and S poles of the fixed magnet 6. A Cu film 13 is provided on the surface of the sliding magnet 4, and the Cu-FEP film 2 is in contact with the Cu film 13 to form a Cu-FEP-Cu film.
[0027] In this embodiment, the fixed magnet 6 is embedded in the magnet housing 5 , and the magnet housing 5 is fixed to the bottom of the base through a magnet support 9 and bolts 10 .
[0028] In this embodiment, the sliding magnet 4 is embedded in a magnet housing 5 , and the magnet housing 5 is fixed to the bottom of the sliding block 7 through a magnet support 9 and a bolt 10 .
[0029] In this embodiment, the magnet support 9 includes a hollow clamping component and a triangular bracket component, the hollow clamping component passes through the baffle of the triangular bracket component, and bolt mounting holes are provided on the baffle of the hollow clamping component and the triangular bracket component; when the bolt 10 is tightened, the baffle of the hollow clamping component and the triangular bracket component are relatively close, so that the hollow clamping component can clamp the magnet housing from four directions to fully constrain it; when the bolt 10 is loosened, the hollow clamping component shrinks outward, and the magnet housing is not clamped. At this time, the magnet housing can be taken out and related work can be done, such as replacing the original fixed magnet.
[0030] In this embodiment, an external power device 14 is provided between the Cu-FEP film 2 and the Cu film 13 .
[0031] The wearable tristable power generation device should meet the following conditions: when the sliding magnet and the fixed magnet are in the Figure 3 When the slider is in the middle and both sides are at x=±a, the device is in a stable equilibrium point. In the process from -x to x, the device changes from negative stiffness to positive stiffness three times, and the potential energy curve is expressed as follows: Figure 4 The tristable characteristics shown in the figure indicate that there are three potential energy wells. The movement of the slider between the potential energy wells is mainly caused by external force excitation and the interaction between magnets.
[0032] Reference Figure 7 The working principle of the device is as follows: when no external force is applied, the device is in a static state, the sliding magnet is located in the middle, and the relative displacement with the device is zero. In one cycle, when there is external vibration, the sliding magnet is displaced. When the Cu film on the sliding magnet is not in contact with the Cu-FEP film on the bottom, the FEP film has a stronger ability to attract electrons than the Cu film, so the FEP film is negatively charged and the upper Cu film is positively charged; as the degree of non-contact increases, the potential difference between the two increases, and the electrons of the lower Cu film flow to the upper Cu film, thereby generating an opposite current. When the limit position is reached, the sliding magnet will return. At this time, due to the gradual decrease in the degree of non-contact, the potential difference between the upper Cu film and the lower Cu film gradually decreases, and the negative charge returns to the side with lower potential; when the two are in contact, the potential difference is zero, and no current is generated at this time; then the opposite displacement difference is generated, and the above steps are repeated until they are in contact again, and a cycle can be completed, thereby generating an alternating current and realizing the conversion of mechanical vibration energy into electrical energy. After a period of time when the external force is reduced or removed, the negative stiffness mechanism will return to its original state, allowing the friction generator to return to a stable state and wait for the next external force to act.
[0033] The following is the formula principle used by the device:
[0034] ;
[0035] is the potential energy of the sliding magnet in the magnetic field, is the vacuum permeability, , are the magnetization intensities of the sliding magnet and the fixed magnet, respectively. , are the volumes of the sliding magnet and the fixed magnet, respectively; d is the distance between the fixed magnet and the guide rail. is the displacement distance of the sliding magnet from the intermediate stable equilibrium point, c is the distance between the fixed magnet and the intermediate stable equilibrium point in the guide rail direction, and k is the stiffness coefficient of the spring.
[0036] The energy displacement relationship of the device is as follows Figure 4 As shown, the main parameters are k=1, d=0.1, and c=0.1.
[0037] The utility model is based on wearable equipment, and relies on capturing the energy generated by the friction between the sliding magnet and the base to convert it into electrical energy to power the sensor network nodes. It can be used as a leg wearable device to collect vibration energy generated by movement during exercise, so that the sliding magnet continuously moves between the three potential energy wells in the device, generating large-amplitude and high-speed inter-well movement, and capturing a large amount of energy.
[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A wearable tristable nano-power generation device, characterized in that: It comprises a cushion and a shell, wherein the shell comprises a base, a guide rail is arranged in the middle of the upper inner part of the base, a slider is arranged on the guide rail, two ends of the slider are respectively connected to the base through a spring and a spring sleeve, a Cu-FEP film is arranged in the middle of the inner bottom of the base, two groups of fixed magnets are respectively arranged on both sides of the inner bottom of the base, the N and S poles of the fixed magnets are in the same direction, a sliding magnet is arranged at the bottom of the slider, the N and S poles of the sliding magnet are in opposite directions to the N and S poles of the fixed magnet, a Cu film is arranged on the surface of the sliding magnet, and the Cu-FEP film contacts the Cu film to form a Cu-FEP-Cu film.
2. The wearable tristable nano-power generation device according to claim 1, characterized in that: The fixed magnet is embedded in a magnet housing, and the magnet housing is fixed to the bottom of the base through a magnet support and bolts.
3. The wearable tristable nano-power generation device according to claim 2, characterized in that: The sliding magnet is embedded in a magnet housing, and the magnet housing is fixed to the bottom of the sliding block through a magnet support and bolts.
4. The wearable tristable nano power generation device according to claim 2 or 3, characterized in that: The magnet support includes a hollow clamping component and a triangular bracket component. The hollow clamping component passes through the baffle of the triangular bracket component. Bolt mounting holes are provided on the baffle of the hollow clamping component and the triangular bracket component. When the bolt is tightened, the hollow clamping component and the baffle of the triangular bracket component are relatively close, so that the hollow clamping component can clamp the magnet housing from four directions to fully constrain it. When the bolt is loosened, the hollow clamping component shrinks outward and the magnet housing is not clamped.
5. The wearable tristable nano power generation device according to claim 1, 2 or 3, characterized in that: An external electrical device is arranged between the Cu-FEP film and the Cu film.