A disc-shaped solid-solid friction nanogenerator and wave energy power generation system

Abstract

The present invention provides a disc-shaped solid-solid friction nanogenerator and a wave energy power generation system, the generator comprising: an external support structure, an induction electrode, a polymer material and a plurality of friction balls; the induction electrodes are respectively arranged on the upper and lower inner surfaces of the external support structure; the polymer material covers the induction electrodes; the friction balls are arranged inside the external support structure; the friction balls and the polymer material rub against each other to generate charge transfer, and induce charges on the induction electrodes, which are led out through wires and then output alternating current; the overall shape of the generator in the present invention is disc-shaped, and the disc-shaped structure enables the generator to collect wave energy in all directions and convert it into electrical energy in real time, thereby realizing omnidirectional energy capture and improving power generation efficiency; at the same time, the present invention has a simple structure, is easy to manufacture, and is easy to be stacked and integrated into a large-scale power generation array, effectively improving the power generation power, thereby adapting to a wider range of application scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of wave energy power generation, and more specifically, to a disc-shaped solid-solid friction nanogenerator and a wave energy power generation system. Background Art

[0002] Modern society is increasingly dependent on energy, and traditional fossil energy is difficult to meet the huge needs of modern social development due to its high pollution and non-renewable nature. In order to meet the energy needs of modern society, people have begun to turn their attention to the ocean, which stores abundant wave energy. Wave energy is not only green and clean, but also a renewable resource. However, due to the randomness and low frequency of wave motion in the ocean, this poses a challenge to the development and utilization of wave energy.

[0003] Electromagnetic generators are usually used for the development and utilization of wave energy in the ocean. Electromagnetic wave energy power generation devices require at least a two-stage energy conversion system. First, the primary energy conversion system converts the kinetic energy and potential energy of the waves into mechanical energy, and then the secondary energy conversion system converts the mechanical energy into electrical energy. These energy conversion systems are not only complex in structure, but also have high maintenance costs. In addition, due to the high corrosion and high humidity characteristics of the marine environment, the development cost of electromagnetic wave energy power generation devices will inevitably remain high. Electromagnetic generators are generally only suitable for the collection of high-frequency energy, but the wave energy in the ocean is disordered and low-frequency, and the use of electromagnetic generators is inefficient in the process of wave energy collection.

[0004] In recent years, the emergence of friction nanogenerators has brought a new way to wave energy collection. Solid-solid friction nanogenerators have the characteristics of small size, simple structure and high efficiency in collecting low-frequency energy. However, due to friction loss, the contact friction surface of existing solid-solid friction nanogenerators is prone to wear, which reduces the working efficiency. When the wear is heavy, it may even be damaged. Moreover, the output power of a single friction nanogenerator unit is limited. In order to better meet the needs of external load work, multiple friction nanogenerator units must be connected in parallel to form a power generation network to increase the output power.

[0005] An existing patent document discloses a marine lifesaving equipment with a self-powered system, including an equipment body, a power generation energy pack, a rectifier circuit and a distress signal transmitting device; the power generation energy pack includes a polymer material layer, an electrode layer A, a rectangular foam box, an electrode layer B, an electrode layer C and a polymer material ball; the polymer material layer, the electrode layer A and the rectangular foam box constitute a liquid-solid contact friction nanogenerator, and the rectangular foam box, the electrode layer B and the polymer material ball constitute a solid-solid contact friction nanogenerator; although the solution is provided with a solid-solid friction nanogenerator inside the equipment, the power generation energy pack is only used to power the distress signal transmitting device, and the power generation power is relatively low; at the same time, the solid-solid friction nanogenerator is a square structure, which can only collect wave energy in a specific direction, and the power generation efficiency is relatively low; in addition, the device is difficult to be integrated into a power generation network and cannot meet the power supply needs of higher power. Summary of the invention

[0006] In order to overcome the defects of the above-mentioned prior art solid-solid friction nanogenerators in terms of low power and efficiency and difficulty in integration into a power generation network, the present invention provides a disc-shaped solid-solid friction nanogenerator and a wave energy power generation system. The disc-shaped structure enables the generator to collect wave energy in all directions and achieve omnidirectional energy capture, thereby improving the power generation efficiency. At the same time, the present invention has a simple structure and is easy to integrate into a large-scale power generation array, effectively improving the power generation power, thereby adapting to a wider range of application scenarios.

[0007] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0008] A disk-shaped solid-solid friction nanogenerator, comprising: an external support structure, a sensing electrode, a polymer material and a plurality of friction balls;

[0009] The external support structure is a cylindrical structure with a hollow interior; the sensing electrodes are respectively arranged on the upper and lower inner surfaces of the external support structure; the polymer material covers the sensing electrodes; and the friction ball is arranged inside the external support structure;

[0010] When the disc-shaped solid-solid friction nanogenerator swings, the friction ball rolls inside the external support structure and rubs against the polymer material to generate charge transfer, and induced charges are induced on the induction electrode. The induced charges are led out through an external wire directly connected to the induction electrode to generate alternating current.

[0011] Preferably, the external support structure is made of insulating material, and the insulating material has a supporting function;

[0012] The material of the external support structure includes any one of acrylic, polyvinyl chloride and polyphenylene ether.

[0013] Preferably, the sensing electrode is made of conductive material;

[0014] The material of the sensing electrode includes: any one of copper, aluminum, gold and a semiconductor material with conductive capability.

[0015] Preferably, the sensing electrode is a conductive copper foil tape.

[0016] Preferably, at least two mutually symmetrical and non-contact sensing electrodes are respectively arranged on the upper and lower inner surfaces of the external support structure; it is best to arrange two semicircular electrodes symmetrically spaced on each surface, or multiple groups of symmetrical electrodes may be arranged, for example, four electrodes, each electrode having a shape of 1 / 4 circle, which is not limited here, and the number of electrodes may be set as required;

[0017] In the present invention, a single friction nanogenerator can collect energy in multiple directions. However, when there are only two separated semicircular electrodes, if the movement direction of the generator is parallel to the direction of electrode separation (that is, when the generator swings back and forth along the symmetry axis of the electrode), the output power is low. In this case, multiple groups of electrodes with different symmetry directions can be set to improve this problem and realize the effective collection of wave energy in all directions.

[0018] In addition, when multiple groups of electrodes with different symmetric directions are provided, the connection relationship between different electrodes can be controlled by electronic switches according to the swing direction of the generator, so that the most suitable electrodes can be flexibly selected to enable the generator to maintain the maximum output power at all times.

[0019] Preferably, the polymer material includes any one of PTFE, PE, PP, PET, PDMS and PVC.

[0020] Preferably, the friction ball is a copper ball.

[0021] Preferably, the coverage area of ​​the polymer material is the same as the upper and lower inner surface areas of the external support structure, and a larger coverage area is helpful to obtain a higher output power.

[0022] Preferably, the diameter of the friction ball is half of the distance between the upper and lower inner surfaces of the external support structure, so that the friction ball can be in close contact with the polymer material on the upper and lower inner surfaces of the external support structure, thereby improving power generation efficiency.

[0023] The present invention also provides a wave energy power generation system, which uses the above-mentioned disk-shaped solid-solid friction nanogenerator, including a wave energy power generation device, a rectifier device, an electric energy management device and a plurality of offshore power-using equipment connected in sequence;

[0024] The wave energy power generation device is provided with m power generation boxes in parallel; each power generation box is provided with n disk-shaped solid-solid friction nanogenerators stacked in it, and the n disk-shaped solid-solid friction nanogenerators are connected in parallel; m and n are respectively the first and second positive integers; the wave energy power generation device is used to collect wave energy in all directions at sea and generate alternating current;

[0025] The rectifier device is used to rectify the AC power output by the wave energy power generation device into DC power and output it to the power management device;

[0026] The power management device is used to supply power to each offshore electrical equipment.

[0027] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0028] The present invention provides a disc-shaped solid-solid friction nanogenerator and a wave energy power generation system, wherein the generator comprises: an external support structure, an induction electrode, a polymer material and a plurality of friction balls; the external support structure is a cylindrical structure with a hollow interior; the induction electrodes are respectively arranged on the upper and lower inner surfaces of the external support structure; the polymer material covers the induction electrodes; the friction balls are arranged inside the external support structure; when the disc-shaped solid-solid friction nanogenerator swings, the friction balls roll inside the external support structure and rub against the polymer material to generate charge transfer, and induced charges are induced on the induction electrodes, and the induced charges are led out through external wires directly connected to the induction electrodes to generate alternating current;

[0029] The overall shape of the solid-solid friction nanogenerator in the present invention is disc-shaped. The disc-shaped structure enables the generator to collect wave energy in all directions and convert it into electrical energy in real time when it swings with the waves on the sea, thereby achieving omnidirectional energy capture and improving power generation efficiency. At the same time, the present invention has a simple structure and is easy to manufacture. It can be integrated into a large-scale power generation array by stacking them one by one, effectively improving the power generation power, thereby adapting to a wider range of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of a disc-shaped solid-solid friction nanogenerator provided in Example 1.

[0031] Figure 2 This is a schematic diagram of the power generation principle of the disc-shaped solid-solid friction nanogenerator provided in Example 1.

[0032] Figure 3 This is a three-dimensional rendering of a disc-shaped solid-solid friction nanogenerator provided in Example 2.

[0033] Figure 4This is a performance test result diagram of the disc-shaped solid-solid friction nanogenerator provided in Example 2.

[0034] Figure 5 This is a schematic diagram of the stacking and integration of multiple disc-shaped solid-solid friction nanogenerators provided in Example 2.

[0035] Figure 6 This is a schematic diagram of the integrated power supply of multiple solid-solid friction nanogenerators provided in Example 2.

[0036] Figure 7 This is a three-dimensional rendering of a disc-shaped solid-solid friction nanogenerator provided in Example 3.

[0037] Figure 8 This is a circuit connection diagram of the disc-shaped solid-solid friction nanogenerator with four electrodes provided in Example 3.

[0038] Fig. 9 This is a structural diagram of a wave energy power generation system provided in Example 4. DETAILED DESCRIPTION

[0039] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0040] In order to better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0041] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0042] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0043] Example 1

[0044] like Figure 1 As shown, this embodiment provides a disk-shaped solid-solid friction nanogenerator, including: an external support structure 1, a sensing electrode 2, a polymer material 3 and a plurality of friction balls 4;

[0045] The external support structure 1 is a cylindrical structure with a hollow interior; the sensing electrodes 2 are respectively arranged on the upper and lower inner surfaces of the external support structure 1; the polymer material 3 covers the sensing electrodes 2; and the friction ball 4 is arranged inside the external support structure 1;

[0046] When the disc-shaped solid-solid friction nanogenerator swings, the friction ball 4 rolls inside the external support structure 1 and rubs against the polymer material 3 to generate charge transfer, and induced charges are induced on the induction electrode 2. The induced charges are led out through an external wire directly connected to the induction electrode 2 to generate alternating current.

[0047] In the specific implementation process, the generator uses friction balls 4 and polymer materials 3 as solid-solid contact friction layers, and the material polarities of the friction balls 4 and the polymer materials 3 are opposite; when collecting energy, when the disc-shaped solid-solid friction nanogenerator swings with the waves on the sea, the friction balls 4 roll inside the external support structure 1 and rub against the polymer material 3. Due to the principle of friction electrification, the friction balls 4 lose electrons and carry positive charges, while the polymer material 3 gains electrons and carries negative charges, thereby generating electricity through friction; due to the principle of electrostatic induction, the induction electrode 2 will induce positive charges at this time, which are then led out through external wires; Figure 2 As shown, the above process is repeated to continuously generate alternating current;

[0048] The solid-solid friction nanogenerator in this embodiment has an overall disc shape. The disc-shaped structure enables the generator to collect wave energy in all directions and convert it into electrical energy in real time when it swings with the waves on the sea, thereby achieving omnidirectional energy capture and improving power generation efficiency. At the same time, the generator in this embodiment has a simple structure and is easy to manufacture. It can be integrated into a large-scale power generation array by stacking them one by one, effectively improving the power generation capacity, thereby adapting to a wider range of application scenarios.

[0049] Example 2

[0050] like Figure 3 As shown, this embodiment provides a disk-shaped solid-solid friction nanogenerator, including: an external support structure 1, a sensing electrode 2, a polymer material 3 and a plurality of friction balls 4;

[0051] The external support structure 1 is a cylindrical structure with a hollow interior; two mutually symmetrical and non-contact sensing electrodes 2 are respectively arranged on the upper and lower inner surfaces of the external support structure 1, and each sensing electrode 2 is in the shape of a semicircle;

[0052] The polymer material 3 covers the sensing electrode 2; the friction ball 4 is arranged inside the external support structure;

[0053] When the disk-shaped solid-solid friction nanogenerator swings, the friction ball 4 rolls inside the external support structure 1 and rubs against the polymer material 3 to generate charge transfer, and induced charges are induced on the induction electrode 2. The induced charges are led out through an external wire directly connected to the induction electrode 2 to generate alternating current;

[0054] The external support structure 1 is made of insulating material, and the insulating material has a supporting function;

[0055] The material of the external support structure 1 includes: any one of acrylic, polyvinyl chloride and polyphenylene ether, and in this embodiment, acrylic;

[0056] The sensing electrode 2 is made of conductive material;

[0057] The material of the sensing electrode 2 includes: any one of copper, aluminum, gold and a semiconductor material having conductive capability;

[0058] In this embodiment, the sensing electrode 2 is specifically a conductive copper foil tape;

[0059] The polymer material 3 includes: any one of PTFE, PE, PP, PET, PDMS and PVC, and in this embodiment, it is PTFE (polytetrafluoroethylene);

[0060] The friction ball 4 is specifically a copper ball;

[0061] The coverage area of ​​the polymer material 3 is the same as the upper and lower inner surface areas of the external support structure 1, and a larger coverage area helps to obtain a higher output power;

[0062] The diameter of the friction ball 4 is half of the distance between the upper and lower inner surfaces of the external support structure 1, so that the friction ball 4 can be in close contact with the polymer material 3 on the upper and lower inner surfaces of the external support structure 1, thereby improving the power generation efficiency.

[0063] In the specific implementation process, the generator structure includes: two circular acrylic plates, a number of electrodes, a number of copper ball particles and a PTFE film; the generator is based on the principles of friction electrification and electrostatic induction, using the friction between the copper ball particles and the PTFE film to generate charge transfer, and then using the electrodes attached to the back of the PTFE film to derive the induced charge, thereby outputting an electrical signal;

[0064] In this embodiment, copper sphere particles with a small diameter and PTFE film are used for solid-solid friction power generation, and then the friction layer and the electrode are encapsulated using acrylic plates and acrylic gaskets to prepare an independent solid-solid friction nanogenerator;

[0065] like Figure 3 As shown, the solid-solid friction nanogenerator includes:

[0066] 1) A circular acrylic upper plate 11 and a circular acrylic lower plate 12 with a diameter of 120 mm and a thickness of 4 mm, respectively located at the top and bottom; and a circular acrylic gasket 13;

[0067] The circular acrylic upper plate 11, the circular acrylic lower plate 12 and the annular acrylic gasket 13 together constitute a cylindrical external support structure 1;

[0068] 2) The sensing electrodes 2 are closely attached to the inner surfaces of the circular acrylic upper plate 11 and the circular acrylic lower plate 12. In this embodiment, commercial conductive copper foil tape with a thickness of 0.1 mm is used. Moreover, on the inner surface of each acrylic plate, two sensing electrodes 2 are separated by 6 cm and are symmetrically distributed on the corresponding acrylic plate.

[0069] 3) a PTFE (polytetrafluoroethylene) film covering the sensing electrode 2, with a thickness of 0.08 mm, as the polymer material 3;

[0070] 4) A plurality of copper ball particles with a diameter of 2 mm, namely the friction balls 4, are arranged inside the external support structure 1;

[0071] If the copper ball particles inside are removed, the solid-solid friction nanogenerator presents a symmetrical structure from top to bottom and from left to right.

[0072] The generator in this embodiment uses copper ball particles and PTFE film to perform solid-solid contact friction power generation; when collecting energy, when the disc-shaped solid-solid friction nanogenerator swings with the waves on the sea, the friction ball 4 rolls inside the external support structure 1 and rubs against the polymer material 3. Due to the principle of friction electrification, the friction ball 4 loses electrons and becomes positively charged, while the polymer material 3 gains electrons and becomes negatively charged, thereby generating electricity through friction; due to the principle of electrostatic induction, the induction electrode 2 will induce positive charge at this time, which is then led out through an external wire; the above process is repeated to continuously generate alternating current;

[0073] like Figure 4 The performance test result of the disk-shaped solid-solid friction nanogenerator is shown in the figure. The average maximum open circuit voltage of a single generator is 158.27V, and the average maximum short circuit current is 0.54μA. It can be seen that the generator in this embodiment has a significant increase in output power compared with the traditional square solid-solid friction generator because it can capture wave energy in all directions;

[0074] In addition, in order to obtain greater power output, such as Figure 5 As shown, multiple groups of solid-solid friction nanogenerators can be stacked one by one to form a large-scale power generation array to ensure the power demand of high-power offshore power equipment.

[0075] When multiple friction nanogenerators are integrated, they can also be integrated in staggered directions (i.e., the direction in which the sensing electrodes are separated) (since the friction nanogenerator is cylindrical, it can be integrated by rotating a certain angle relative to the previous friction nanogenerator), and it can also collect wave energy in all directions (all directions);

[0076] like Figure 6 The figure shows a schematic diagram of integrated power supply of multiple solid-solid friction nanogenerators. The AC power output by the generator is rectified into DC power through an external rectifier circuit, and then output to an external energy storage device and a load to realize integrated power supply.

[0077] The solid-solid friction nanogenerator in this embodiment has an overall disc shape. The disc-shaped structure enables the generator to collect wave energy in all directions and convert it into electrical energy in real time when it swings with the waves on the sea, thereby achieving omnidirectional energy capture and improving power generation efficiency. At the same time, the generator in this embodiment has a simple structure and is easy to manufacture. It can be integrated into a large-scale power generation array by stacking them one by one, effectively improving the power generation capacity, thereby adapting to a wider range of application scenarios.

[0078] Example 3

[0079] like Figure 7 As shown, this embodiment provides a disk-shaped solid-solid friction nanogenerator, including: an external support structure 1, a sensing electrode 2, a polymer material 3 and a plurality of friction balls 4;

[0080] The external support structure 1 is a cylindrical structure with a hollow interior; four mutually symmetrical and non-contact sensing electrodes 2 are respectively arranged on the upper and lower inner surfaces of the external support structure 1, and the shape of each sensing electrode 2 is 1 / 4 circle;

[0081] The polymer material 3 covers the sensing electrode 2; the friction ball 4 is arranged inside the external support structure;

[0082] When the disk-shaped solid-solid friction nanogenerator swings, the friction ball 4 rolls inside the external support structure 1 and rubs against the polymer material 3 to generate charge transfer, and induced charges are induced on the induction electrode 2. The induced charges are led out through an external wire directly connected to the induction electrode 2 to generate alternating current;

[0083] The external support structure 1 is made of insulating material, and the insulating material has a supporting function;

[0084] The material of the external support structure 1 includes: any one of acrylic, polyvinyl chloride and polyphenylene ether, and in this embodiment, acrylic;

[0085] The sensing electrode 2 is made of conductive material;

[0086] The material of the sensing electrode 2 includes: any one of copper, aluminum, gold and a semiconductor material having conductive capability;

[0087] In this embodiment, the sensing electrode 2 is specifically a conductive copper foil tape;

[0088] The polymer material 3 includes: any one of PTFE, PE, PP, PET, PDMS and PVC, and in this embodiment, it is PTFE (polytetrafluoroethylene);

[0089] The friction ball 4 is specifically a copper ball;

[0090] The coverage area of ​​the polymer material 3 is the same as the upper and lower inner surface areas of the external support structure 1, and a larger coverage area helps to obtain a higher output power;

[0091] The diameter of the friction ball 4 is half of the distance between the upper and lower inner surfaces of the external support structure 1, so that the friction ball 4 can be in close contact with the polymer material 3 on the upper and lower inner surfaces of the external support structure 1, thereby improving the power generation efficiency.

[0092] In the specific implementation process, the generator structure includes: two circular acrylic plates, a number of electrodes, a number of copper ball particles and a PTFE film; the generator is based on the principles of friction electrification and electrostatic induction, using the friction between the copper ball particles and the PTFE film to generate charge transfer, and then using the electrodes attached to the back of the PTFE film to derive the induced charge, thereby outputting an electrical signal;

[0093] In this embodiment, copper sphere particles with a small diameter and PTFE film are used for solid-solid friction power generation, and then the friction layer and the electrode are encapsulated using acrylic plates and acrylic gaskets to prepare an independent solid-solid friction nanogenerator;

[0094] The solid-solid friction nanogenerator in this embodiment includes:

[0095] 1) A circular acrylic upper plate 11 and a circular acrylic lower plate 12 with a diameter of 120 mm and a thickness of 4 mm, respectively located at the top and bottom; and a circular acrylic gasket 13;

[0096] The circular acrylic upper plate 11, the circular acrylic lower plate 12 and the annular acrylic gasket 13 together constitute a cylindrical external support structure 1;

[0097] 2) The sensing electrodes 2 are closely attached to the inner surfaces of the circular acrylic upper plate 11 and the circular acrylic lower plate 12. In this embodiment, commercial conductive copper foil tape with a thickness of 0.1 mm is used; and on the inner surface of each acrylic plate, four sensing electrodes 2 are separated and distributed on the corresponding acrylic plate in a centrally symmetrical manner;

[0098] 3) a PTFE (polytetrafluoroethylene) film covering the sensing electrode 2, with a thickness of 0.08 mm, as the polymer material 3;

[0099] 4) A plurality of copper ball particles with a diameter of 2 mm, namely the friction balls 4, are arranged inside the external support structure 1;

[0100] If the copper ball particles inside are removed, the solid-solid friction nanogenerator presents a symmetrical structure from top to bottom and from left to right.

[0101] The generator in this embodiment uses copper ball particles and PTFE film to perform solid-solid contact friction power generation; when collecting energy, when the disc-shaped solid-solid friction nanogenerator swings with the waves on the sea, the friction ball 4 rolls inside the external support structure 1 and rubs against the polymer material 3. Due to the principle of friction electrification, the friction ball 4 loses electrons and becomes positively charged, while the polymer material 3 gains electrons and becomes negatively charged, thereby generating electricity through friction; due to the principle of electrostatic induction, the induction electrode 2 will induce positive charge at this time, which is then led out through an external wire; the above process is repeated to continuously generate alternating current;

[0102] In Examples 1 and 2, a single friction nanogenerator can collect energy in multiple directions. However, when there are only two separated semicircular electrodes, if the generator swings back and forth along the symmetry axis of the electrode, the output power is low. Therefore, this embodiment improves this problem by setting multiple groups of electrodes in different symmetry directions, thereby achieving effective collection of wave energy in all directions.

[0103] like Figure 8 In the circuit diagram shown, when two groups of symmetrical electrodes are provided, the four electrodes A1 to A4 are connected to the control switch respectively. According to the swing direction of the generator, the connection relationship between different electrodes is controlled by the control switch, so that the most suitable electrode can be flexibly selected to keep the maximum output power of the generator at all times; for example, when the generator swings left and right, the control switch connects A1 and A3 as one group of output interfaces, and A2 and A4 as another group of output interfaces; when the generator swings up and down, A1 and A2 are connected as one group of output interfaces, and A3 and A4 are connected as another group of output interfaces; thus, the corresponding electrodes are flexibly selected, and the energy collection efficiency is improved; finally, the output AC power is rectified into DC power and transmitted to the energy storage device and the load;

[0104] The solid-solid friction nanogenerator in this embodiment has an overall disc shape. The disc-shaped structure enables the generator to collect wave energy in all directions and convert it into electrical energy in real time when it swings with the waves on the sea, thereby achieving omnidirectional energy capture and improving power generation efficiency. At the same time, the generator in this embodiment has a simple structure and is easy to manufacture. It can be integrated into a large-scale power generation array by stacking them one by one, effectively improving the power generation capacity, thereby adapting to a wider range of application scenarios.

[0105] Example 4

[0106] like Fig. 9 As shown, this embodiment provides a wave energy power generation system, which uses a disc-shaped solid-solid friction nanogenerator described in embodiment 1 or 2, including a wave energy power generation device, a rectifier device, an electric energy management device and a plurality of offshore power-using equipment connected in sequence;

[0107] The wave energy power generation device is provided with m power generation boxes in parallel; each power generation box is provided with n disk-shaped solid-solid friction nanogenerators stacked in it, and the n disk-shaped solid-solid friction nanogenerators are connected in parallel; m and n are respectively the first and second positive integers; the wave energy power generation device is used to collect wave energy in all directions at sea and generate alternating current;

[0108] The rectifier device is used to rectify the AC power output by the wave energy power generation device into DC power and output it to the power management device;

[0109] The power management device is used to supply power to each offshore electrical equipment.

[0110] In the specific implementation process, the wave energy power generation device collects wave energy from all directions at sea and generates alternating current;

[0111] The rectifier device then rectifies the AC power output by the wave energy generator into DC power and outputs it to the power management device for energy storage;

[0112] Finally, the power management device supplies power to each offshore electrical equipment, including small equipment such as ocean buoys and hydrographic detectors;

[0113] The power generation system of this embodiment is based on a solid-solid friction nanogenerator, which generates electricity as it swings with the waves. Wind and waves exist at sea all the time, and it can provide power to offshore equipment at all times, making up for the shortcomings of battery power supply that is unsustainable and requires manual maintenance. It can also meet the power supply needs of small equipment such as buoys and hydrological detectors arranged in the ocean. In addition, the solid-solid friction nanogenerator of this embodiment can capture wave energy in all directions, so it has higher power generation efficiency and power, and its application fields and applicable scenarios are also more extensive.

[0114] The same or similar reference numerals correspond to the same or similar components;

[0115] The terms used in the drawings to describe positional relationships are only used for illustrative purposes and should not be construed as limiting this patent;

[0116] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A disk-shaped solid-solid friction nanogenerator, characterized in that: include: An external support structure, a sensing electrode, a control switch, a polymer material and a plurality of friction balls; The external support structure is a cylindrical structure with a hollow interior; The sensing electrodes are respectively arranged on the upper and lower inner surfaces of the external support structure; the polymer material covers the sensing electrodes; and the friction ball is arranged inside the external support structure; The upper and lower inner surfaces of the external support structure are respectively provided with two groups of mutually symmetrical and non-contact sensing electrodes, which are respectively denoted as electrodes A1 to A4; When the disk-shaped solid-solid friction nanogenerator swings, the friction ball rolls inside the external support structure and rubs against the polymer material to generate charge transfer, and induced charges are induced on the sensing electrode. The induced charges are led out through an external wire directly connected to the sensing electrode to generate alternating current; The four electrodes A1~A4 are connected to the control switch respectively. According to the swing direction of the generator, the connection relationship between different electrodes is controlled by the control switch. When the generator swings left and right, the control switch connects A1 and A3 as a group of output interfaces, and A2 and A4 as another group of output interfaces; when the generator swings up and down, A1 and A2 are connected as a group of output interfaces, and A3 and A4 are connected as another group of output interfaces, so that the most suitable electrodes can be flexibly selected to enable the generator to maintain the maximum output power at all times.

2. The disc-shaped solid-solid friction nanogenerator according to claim 1, characterized in that: The external supporting structure is made of insulating material, and the insulating material has a supporting function; The material of the external support structure includes any one of acrylic, polyvinyl chloride and polyphenylene ether.

3. The disc-shaped solid-solid friction nanogenerator according to claim 1, characterized in that: The sensing electrode is made of conductive material; The material of the sensing electrode includes: any one of copper, aluminum, gold and a semiconductor material with conductive capability.

4. The disc-shaped solid-solid friction nanogenerator according to claim 3, characterized in that: The sensing electrode is specifically a conductive copper foil tape.

5. The disc-shaped solid-solid friction nanogenerator according to claim 1, characterized in that: The polymer material includes any one of PTFE, PE, PP, PET, PDMS and PVC.

6. The disk-shaped solid-solid friction nanogenerator according to claim 1, characterized in that: The friction ball is specifically a copper ball.

7. The disk-shaped solid-solid friction nanogenerator according to claim 1, characterized in that: The polymer material covers an area equal to the upper and lower inner surface areas of the outer support structure.

8. The disk-shaped solid-solid friction nanogenerator according to claim 1, characterized in that: The diameter of the friction ball is half of the distance between the upper and lower inner surfaces of the external support structure.

9. A wave energy power generation system, using a disk-shaped solid-solid friction nanogenerator as claimed in any one of claims 1 to 8, characterized in that: It includes a wave energy generating device, a rectifying device, an electric energy management device and several offshore electric equipments connected in sequence; The wave energy power generation device is provided with m power generation boxes in parallel; each power generation box is provided with n disk-shaped solid-solid friction nanogenerators stacked in it, and the n disk-shaped solid-solid friction nanogenerators are connected in parallel; m and n are respectively the first and second positive integers; the wave energy power generation device is used to collect wave energy in all directions at sea and generate alternating current; The rectifier device is used to rectify the AC power output by the wave energy power generation device into DC power and output it to the power management device; The power management device is used to supply power to each offshore electrical equipment.

Images