Device for charging battery of electric vehicle

Abstract

The invention belongs to the technical field of new energy automobiles, and particularly relates to an electric automobile battery charging device which is composed of a nanometer generator set, a first wire, an ACDC inverter, a second wire and a transformer. The system is composed of a first lead, a second lead, a third lead, a current sensor, a fourth lead, a charging control switch, a fifth lead, a bidirectional converter, a sixth lead, a storage battery pack connected with a charging port, a seventh lead, a first voltage sensor, a second voltage sensor, an eighth lead, a ninth lead, a tenth lead and an eleventh lead. The device has the effects that the device is installed on the electric vehicle, can charge the electric vehicle in the running process, and can charge the electric vehicle with the electric quantity of 0.011 kW.h to 0.027 kW.h per hour. Energy wasted in the running process of the automobile is fully utilized, and the endurance mileage of the electric automobile is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a battery charging device for an electric vehicle. Background Art

[0002] The popularity of new energy electric vehicles is rising rapidly around the world, and they are gradually replacing fuel vehicles and becoming the favorite of consumers. The drive motor is usually the "heart" of an electric vehicle, and its working principle is very different from that of a traditional fuel vehicle engine. A fuel vehicle drives the engine by burning fuel and transfers energy to the vehicle's transmission system to drive the vehicle forward. Electric vehicles, on the other hand, use drive motors to convert electrical energy into mechanical energy to drive the vehicle forward. Therefore, the drive motor requires higher voltage and current when working in order to achieve high-efficiency and high-speed driving effects. There are two types of electric vehicle charging piles: fast charging piles and slow charging piles. Fast charging piles use direct current, and the access voltage reaches more than 380V; slow charging piles use alternating current, and the access voltage is 220V. Regardless of the type of charging pile, the maximum charging current is 16A.

[0003] To maintain the normal operation of electric vehicles, they need to be charged at charging stations from time to time. During the driving process of electric vehicles, the body of the electric vehicle will vibrate, and at the same time, it needs to overcome the wind resistance caused by the movement, which consumes energy. How to effectively utilize the energy consumed by the body vibration and wind resistance to charge the battery is an urgent problem to be solved.

[0004] Chinese patent CN 118739304 A discloses an integrated device and method for charge-discharge interconnection control for shared application in distribution station area, wherein the integrated device includes an AC-DC coupling circuit, a flow tapping circuit, a DC charge-discharge circuit and a controller; one end of the AC-DC coupling circuit is connected to the AC access port, and the other end is connected to the AC side of the flow tapping circuit, for realizing grid-connected interaction with the AC power grid; one end of the DC charge-discharge circuit is connected to the charge-discharge port, and the other end is connected to the DC side of the flow tapping circuit, for realizing interaction with the charging device; the flexible interconnection side of the flow tapping circuit is connected to the flexible interconnection port, for realizing internal DC flow channel control; the controller is respectively connected to the AC-DC coupling circuit, the flow tapping circuit and the DC charge-discharge circuit, for being responsible for secondary communication management and control instruction execution. The present invention realizes V2G and flexible interconnection control multiplexing to meet the charging needs of electric vehicles and closed-loop operation of distribution station areas.

[0005] Chinese patent CN 118739515 A discloses an ultra-wide voltage input bidirectional charging module device and a circuit control method thereof, comprising: a PWM fully controlled rectifier unit, a sensor CT, a BUCK / BOST composite conversion unit, a full-bridge DAB conversion unit, a capacitor Co and a load RL; the sensor CT is connected in series between the voltage output end of the PWM fully controlled rectifier unit and the voltage input end of the BUCK / BOST composite conversion unit, the voltage output end of the BUCK / BOST composite conversion unit is connected to the voltage input end of the full-bridge DAB conversion unit, the capacitor Co is connected in parallel to the output end of the full-bridge DAB conversion unit, and the load RL is connected in parallel to the capacitor Co; the present application adopts a three-level composite topology architecture of a PWM fully controlled rectifier unit, a BUCK / BOST composite conversion unit and a full-bridge DAB conversion unit, which not only solves the problem of ultra-wide voltage input on the grid side and the problem of charging on an 800V high voltage platform in the charging technology of new energy electric vehicles, but also solves the problem of vehicle-grid interaction.

[0006] Chinese patent CN 118739375 A discloses an integrated charging control method based on edge computing, which belongs to the field of power control technology and solves the problem of how to use a small amount of data to accurately predict the total charging amount of electric vehicles and control the energy storage module to store appropriate electric energy, thereby avoiding the problem of still needing to obtain electric energy from the power grid during peak hours, failing to reduce the load and fluctuation of the power grid during peak hours, and avoiding the problem of excessive energy storage in the energy storage module, resulting in waste of electric power resources; the method includes: statistically obtaining a data set of electric vehicle historical charging amounts in the same time period as the target charging area and the next peak period, analyzing and obtaining a first predicted charging amount of all electric vehicles in the target charging area during the next peak period; analyzing and obtaining the health status of each energy storage battery; analyzing and obtaining a second predicted charging amount that the energy storage module needs to obtain from the power grid during the current off-peak period or flat period, and controlling the power grid to output electric energy to the energy storage module for storage.

[0007] Chinese patent CN118700881A discloses an electric vehicle charging control system, which involves the field of new energy; including: a central processing module, which is used to process information and generate control instructions; a charging circuit module, which is used to cooperate with a charging gun to charge the electric vehicle; a charging parameter control module, which is used to control the charging power, charging time, charging voltage, and charging current; a communication interface, which is used to establish communication between the charging gun and the charging pile. The "embedded" design of the present invention: adopts the "embedded" design concept combining software + hardware, uses the established nuclear protocol product development database, fully considers the monitoring and control of parameters such as charging current, voltage and temperature, and various charging modes, and constructs a software and hardware system through continuous experimental optimization to achieve high power conversion and truly low power consumption, reducing it from the original 1000uA to less than 100uA.

[0008] Chinese patent CN 118677204 A discloses a composite vibration energy collection device, which includes an electromagnetic generator module, a piezoelectric nanogenerator module and a friction nanogenerator module. The electromagnetic generator module generates electrical output and drives the other two modules as a mass block; the piezoelectric nanogenerator module includes a positive electrode layer, a negative electrode layer and a piezoelectric layer, which induces the piezoelectric layer to deform through the impact of the movement of a magnet, thereby driving its internal electric dipole to produce a polarization effect and generate current; the friction nanogenerator module includes: a substrate, a buffer layer, an electrode layer and a friction layer, which causes the friction layer to periodically contact and separate through the movement of a magnet, so that a potential difference is generated between the electrode layers, thereby driving the flow of charge and generating current. The hybrid friction nanogenerator disclosed in the present invention can realize the in-situ collection of vibration energy and provide electrical energy for small electronic devices.

[0009] Chinese patent CN 113949306 B discloses an environmental vibration energy harvesting device and a high-speed train operating environment monitoring system, which aims to achieve the collection of vibration excitation energy with a wider frequency. To this end, the environmental vibration energy harvesting device provided by the present invention includes a rigid box, a vertical slide rail and a mass block, the upper and lower sides of the mass block are connected to the top plate and the bottom plate of the rigid box through a power generation component, the left and right sides of the mass block are connected to the left plate and the right plate of the rigid box through a roller assembly, the power generation component includes a friction nanogenerator and a buffer spring connected between the friction nanogenerator and the rigid box, the roller assembly includes a horizontal guide rail fixedly connected to the rigid box, a horizontal slider slidably mounted on the horizontal guide rail, and a roller arranged on the horizontal slider, arc-shaped concave surfaces that roll with the corresponding rollers are provided on both sides of the mass block, and a main spring that keeps the roller in contact with the corresponding arc-shaped concave surfaces is connected between the rigid box and the horizontal slider.

[0010] Chinese patent CN 113949306 B discloses a rotary friction nanogenerator, comprising a housing, an end cap fixedly connected to both ends of the housing, the center of the end cap being rotatably connected to a rotating shaft; the inner side wall of the housing is axially fixedly connected with a plurality of friction parts, the friction parts comprising a plurality of first friction plates arranged at equal intervals; the circumferential side wall of the rotating shaft is fixedly connected with a plurality of self-generating friction parts, the self-generating friction parts comprising a self-generating component and a second friction plate elastically connected to the upper and lower ends of the self-generating component, the two first friction plates located at the upper and lower ends being in contact with the second friction plate; a conductive part is arranged on the rotating shaft, the self-generating component and the conductive part are electrically connected to an electric energy output device, the first friction plate is electrically connected to the electric energy output device; the two first friction plates adjacent to each other are in contact with the second friction plate. The present invention provides a friction nanogenerator with high energy conversion efficiency.

[0011] Pu Xiong et al. published "Progress in Basic Research and Technological Innovation of Friction Nanogenerators" in "Science and Technology Review" Vol. 41, No. 19, 2023, which states: Friction nanogenerator (TENG) is an emerging platform technology for realizing electromechanical energy conversion, and has great application potential in many fields such as artificial intelligence, Internet of Things, and high-entropy energy. In the past 10 years, through extensive efforts around the world, research on TENG has made great progress. This paper reviews the representative progress of TENG in two aspects: basic research and technological innovation; discusses the latest strategies and methods to improve the output performance of TENG; summarizes the progress of TENG application research in different fields, and looks forward to the challenges and opportunities facing TENG research.

[0012] Wang Zhonglin et al. published "Application of Nanogenerators: Ocean Blue Energy" in "Science China: Technological Sciences" Vol. 53, No. 6, 2023. It states that the ocean contains abundant clean and renewable energy, and the development and utilization of ocean energy will be one of the fundamental ways to solve the energy problem in the post-fossil energy era. At present, ocean energy conversion mainly relies on electromagnetic generators, but their physical principles make their direct conversion efficiency of low-frequency and disordered ocean energy very low. In recent years, the emerging friction nanogenerator (TENG) has significant advantages in low-frequency and high-entropy energy collection, providing a disruptive technical path for the efficient development of ocean energy. Since the idea of ​​using TENG network to collect large-scale ocean blue energy was first proposed by us in 2014, great progress has been made at home and abroad in the optimization of the structure and performance of blue energy devices and their power generation networks, energy management technology, and the application of self-driving systems in marine environments, and the principle verification has been completed. However, continuous exploration is still needed in the further iteration of blue energy technology and the development of engineering applications in marine environments. This paper first explains the original ideas and technical advantages of blue energy based on nanogenerators, then summarizes the overall progress of blue energy related research, and finally looks forward to the development trends and challenges of marine blue energy research.

[0013] Gao Sihang et al. published a paper titled "Transmission Line Vibration Energy Harvesting Device Based on Triboelectric Nanogenerator" in the 2024 issue of Electric Power Engineering Technology, Vol. 43, No. 5. It states that in the current booming development of the power Internet of Things, how to continuously and long-term energy supply has become a technical problem faced by tens of thousands of sensors. As a newly emerging high-efficiency energy supply technology, triboelectric nanogenerator (TENG) has a very broad application prospect in the field of self-powered sensors. Based on the working principle of triboelectricity, this paper uses the vertical contact separation TENG of a multilayer elastomer structure to design a multilayer elastomer TENG energy harvesting device for breeze vibration of transmission lines. The vibration energy harvester output performance test platform simulates the breeze vibration state of the transmission line, tests the basic electrical characteristics of the energy harvester at different frequencies and amplitudes, and combines the power management strategy to construct a vibration energy harvesting self-powered system for breeze vibration of transmission lines, realizes the efficient collection and conversion of broadband vibration energy, and completes the energy supply for commercial sensors. Finally, the effectiveness and feasibility of the vibration energy harvesting device designed in this paper are verified by the transmission line vibration scale model. The vibration energy harvesting self-powered system designed in this paper can effectively convert the broadband vibration energy of the transmission line into electrical energy. It has the characteristics of simple structure and good economy, and solves the problem that the power Internet of Things sensors cannot be powered by green power for a long time.

[0014] Fu Yarong published "Application Prospects of Nanogenerators in Oil and Gas Field Development Engineering" in "Petroleum Drilling Technology" Vol. 38, No. 4, 2016, p. 531-532: The 12mm×12mm×0.7mm friction nanogenerator developed by the Beijing Institute of Nanoenergy and Systems of the Chinese Academy of Sciences in 2014 used the electricity generated by breathing to drive a pacemaker for the first time, which is of great significance to the development of implantable medical devices. The output voltage is as high as 200-1000V, the output current is 100μA, and the diameter is only 3cm 2 A single-layer friction nanogenerator of this size can instantly drive hundreds of LED lights, wireless detection and sensing systems, and charge mobile phone batteries, etc.

[0015] Wang Zhonglin's team published a paper titled "Achieving ultrahigh triboelectric charge density for efficient energy harvesting" in Nature Communications, Vol. 8, 2017. The paper states that based on a conventional triboelectric nanogenerator composed of a copper film and a polytetrafluoroethylene film, the researchers first used soft contact and fragmented structures to make more efficient use of the friction surface, and then increased the triboelectric charge density in the air from 50 μCm to 100 μm. -2 Increased to 120μCm-2 Next, the high vacuum environment was used to minimize the impact of air breakdown and further increase the triboelectric charge density to 660μCm -2 Finally, the researchers introduced ferroelectric materials under the polytetrafluoroethylene film, coupling the triboelectric surface polarization with the hysteresis dielectric polarization of the ferroelectric material, which further increased the triboelectric charge density to 1003 μCm -2 This increases the maximum output power density of conventional triboelectric nanogenerators by two orders of magnitude, from 0.75Wm -2 Increased to 50Wm -2 . Summary of the invention

[0016] The purpose of the present invention is to provide an electric vehicle battery charging device. By utilizing the working principle of the nanogenerator and the amount of electricity generated by the vibration during the driving of the electric vehicle, the electric vehicle battery is charged in real time to achieve the purpose of energy saving and flight increase.

[0017] The technical solution adopted by the present invention is:

[0018] The electric vehicle battery charging device comprises a nano generator set (1), a first wire (2), an AC / DC inverter (3), a second wire (4), a transformer (5), a third wire (6), a current sensor (7), a fourth wire (8), a charging control switch (9), a fifth wire (10), a bidirectional converter (11), a sixth wire (12), a battery pack (13) connected to a charging port, a seventh wire (14), a first voltage sensor (15), a second voltage sensor (16), an eighth wire (17), a ninth wire (18), a tenth wire (19), and an eleventh wire (20).

[0019] The invention is characterized in that: the nanogenerator set (1) is composed of 20-50 friction nanogenerators connected in parallel; the positive electrode of the nanogenerator set (1) is connected in series with one end of a first wire (2); the other end of the first wire (2) is connected in series with the positive electrode of an AC\DC inverter (3); the negative electrode of the AC\DC inverter (3) is connected in series with one end of a second wire (4); the other end of the second wire (4) is connected in series with the positive electrode of a transformer (5); the negative electrode of the transformer (5) is connected in series with one end of a third wire (6);

[0020] The other end of the third wire (6) is connected to the positive electrode of the current sensor (7); the negative electrode of the current sensor (7) is connected to one end of the fourth wire (8); the other end of the fourth wire (8) is connected to the positive electrode of the charging control switch (9); the negative electrode of the charging control switch (9) is connected to one end of the fifth wire (10); the other end of the fifth wire (10) is connected to the positive electrode of the bidirectional converter (11); the negative electrode of the bidirectional converter (11) is connected to one end of the sixth wire (12); the other end of the sixth wire (12) is connected to the positive electrode of the battery pack (13); the negative electrode of the battery pack (13) is connected to one end of the seventh wire (14); the other end of the seventh wire (14) is connected to the negative electrode of the nano-generator group (1);

[0021] One end of the eighth wire (17) is connected to the negative electrode of the nano-generator group (1); the other end of the eighth wire (17) is connected to the positive electrode of the first voltage sensor (15); the negative electrode of the first voltage sensor (15) is connected to one end of the ninth wire (18); the other end of the ninth wire (18) is connected to the positive electrode of the nano-generator group (1);

[0022] One end of the tenth wire (19) is connected to the positive electrode of the battery pack (13); the other end of the tenth wire (19) is connected to the positive electrode of the second voltage sensor (16); the negative electrode of the second voltage sensor (16) is connected to one end of the eleventh wire (20); and the other end of the eleventh wire (20) is connected to the negative electrode of the battery pack (13).

[0023] The specifications of the friction nanogenerator are 12mm×12mm×0.7mm, and it is produced by the Beijing Institute of Nanoenergy and Systems of the Chinese Academy of Sciences;

[0024] The parallel connection mode of the nanogenerator unit (1) composed of 20-50 friction nanogenerators connected in parallel is well known to those skilled in the art, and the nanogenerator unit (1) is spatially arranged in a volume of 30252cm 3 -30259cm 3 The arrangement method is well known to those skilled in the art.

[0025] The nano-generator set is a friction-type nano-generator set.

[0026] The first wire (2), the second wire (4), the third wire (6), the fourth wire (8), the fifth wire (10), the sixth wire (12), the seventh wire (14), the eighth wire (17), the ninth wire (18), the tenth wire (19) and the eleventh wire (20) are BV wires with a diameter of 4 mm or 6 mm, i.e., copper core polyvinyl chloride insulated cloth wires, which are available on the market.

[0027] The AC\DC transformer (5) is of CH6300-T281 type, which is available on the market.

[0028] The inverter has a specification of 454mm×80mm×142mm and a maximum power of 9000W.

[0029] Produced by Shidun Inverter Factory.

[0030] The bidirectional converter model is Model 62000D, which is provided by Zhuozheng Electronic Testing Instrument Supplier.

[0031] The specific connection technology and installation method of the nanogenerator unit (1), the first wire (2), the AC\DC inverter (3), the second wire (4), the transformer (5), the third wire (6), the current sensor (7), the fourth wire (8), the charging control switch (9), the fifth wire (10), the bidirectional converter (11), the sixth wire (12), the battery pack (13) connected with the charging port, the seventh wire (14), the first voltage sensor (15), the second voltage sensor (16), the eighth wire (17), the ninth wire (18), the tenth wire (19), and the eleventh wire (20) are well known to those skilled in the art.

[0032] The electric vehicle battery charging device is spatially arranged in a volume of 30252cm 3 -30259cm 3 The space arrangement method is well known to those skilled in the art. See Table 1.

[0033] Table 1: Spatial layout of electric vehicle battery charging equipment

[0034]

[0035] Briefly describe the method of use of the present invention: first install the nano generator set to a suitable position in the hood of an electric vehicle, then start the electric vehicle, and close the device switch after the reading of the first voltage sensor stabilizes to complete the charging process.

[0036] Ideas and innovations of the present invention:

[0037] The design concept of this invention mainly revolves around the energy-saving and increased endurance needs of new energy electric vehicles. By innovatively introducing nanogenerator technology, the effective collection and utilization of the vibration energy of the vehicle's own components can be achieved.

[0038] The present invention aims to explore new energy replenishment methods to solve the problem of limited cruising range of electric vehicles. A friction nanogenerator is selected as an energy harvesting device because it has the advantages of small size, light weight, and high energy conversion efficiency. An electric vehicle battery charging device is designed, including a friction nanogenerator unit, a wire, an inverter, a transformer, a current sensor, a switch, a bidirectional converter, a battery pack and other components. The charging requirements are met by connecting and stacking multiple friction nanogenerators in parallel. Under the premise of ensuring performance, the space inside the cover is saved as much as possible through reasonable layout and stacking design.

[0039] This invention applies nanogenerator technology to vibration energy harvesting of new energy electric vehicles for the first time, providing a new energy supply path for electric vehicles. The multi-component parallel and stacking design realizes the efficient integration of a large number of nanogenerators through innovative parallel and stacking designs, meeting the high voltage and high current requirements of electric vehicle charging. The present invention adopts space optimization and integrated design. While ensuring performance, it minimizes the size of the generator set through fine layout and stacking design, making it easy to install and use on electric vehicles. The system has the potential to be developed into an intelligent management system. Although it is not explicitly mentioned, the system has the potential to integrate an intelligent management system, which can monitor and adjust the operating status of the generator in real time, and improve the overall efficiency and service life of the system.

[0040] Beneficial effects of the present invention: The present invention provides an electric vehicle battery charging device, which is installed on the electric vehicle and can charge the electric vehicle during operation, and can charge the electric vehicle with 0.011kW·h-0.027kW·h of electricity per hour. The energy wasted during the operation of the vehicle is fully utilized, and the cruising range of the electric vehicle is increased.

[0041] The friction-type nanogenerator collects the energy wasted due to vibration and feeds it back to the battery. After being debugged to an ideal state, it can greatly reduce the energy loss of new energy vehicles, increase the cruising range, and further shorten the gap between the cruising range of new energy electric vehicles and fuel vehicles. See Table 2.

[0042] Table 2: Power generation of friction nanogenerator

[0043]

[0044] The output voltage and current of the friction nanogenerator group are measured by the PDMS-100 piezoelectric friction nanogenerator test system produced by Beijing Jingke Zhichuang Technology Development Co., Ltd. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The present invention is a schematic diagram of an electric vehicle battery charging device.

[0046] Figure 1 In the figure, 1-nano generator set, 2-first wire, 3-inverter, 4-second wire, 5-transformer, 6-third wire, 7-current sensor, 8-fourth wire, 9-charging control switch, 10-fifth wire, 11-bidirectional converter, 12-sixth wire, 13-battery pack, 14-seventh wire, 15-first voltage sensor, 16-second voltage sensor, 17-eighth wire, 18-ninth wire, 19-tenth wire, 20-eleventh wire. Specific implementation plan

[0047] Taking a certain brand of new energy electric vehicle as an example, the electric vehicle battery charging device of the present invention is further described in detail, and the number of generators of the friction-type nano-generator set is taken as 50 as an example.

[0048] See also Figure 1 The present invention discloses an electric vehicle battery charging device, comprising: 1-a nano generator set, 2-a first wire, 3-an inverter, 4-a second wire, 5-a transformer, 6-a third wire, 7-a current sensor, 8-a fourth wire, 9-a switch, 10-a fifth wire, 11-a bidirectional converter, 12-a sixth wire, 13-a battery pack, 14-a seventh wire, 15-a first voltage sensor, 16-a second voltage sensor, 17-an eighth wire, 18-a ninth wire, 19-a tenth wire, and 20-an eleventh wire. In an electric vehicle battery charging device of the present invention, a nanogenerator set (1) is composed of 20 to 50 friction-type nanogenerators connected in parallel; the positive electrode of the nanogenerator set (1) is connected in series with one end of a first wire (2); the other end of the first wire (2) is connected in series with the positive electrode of an AC\DC inverter (3); the negative electrode of the AC\DC inverter (3) is connected in series with one end of a second wire (4); the other end of the second wire (4) is connected in series with the positive electrode of a transformer (5); the negative electrode of the transformer (5) is connected in series with one end of a third wire (6); the other end of the third wire (6) is connected to the positive electrode of a current sensor (7); and the current sensor (7) is connected in series with the positive electrode of the transformer (5). The negative electrode of the device (7) is connected to one end of a fourth wire (8); the other end of the fourth wire (8) is connected to the positive electrode of a charging control switch (9); the negative electrode of the charging control switch (9) is connected to one end of a fifth wire (10); the other end of the fifth wire (10) is connected to the positive electrode of a bidirectional converter (11); the negative electrode of the bidirectional converter (11) is connected to one end of a sixth wire (12); the other end of the sixth wire (12) is connected to the positive electrode of a storage battery (13); the negative electrode of the storage battery (13) is connected to one end of a seventh wire (14); the other end of the seventh wire (14) is connected to the negative electrode of the nano-generator group (1);

[0049] One end of the eighth wire (17) is connected to the negative electrode of the nano-generator group (1); the other end of the eighth wire (17) is connected to the positive electrode of the first voltage sensor (15); the negative electrode of the first voltage sensor (15) is connected to one end of the ninth wire (18); the other end of the ninth wire (18) is connected to the positive electrode of the nano-generator group (1);

[0050] One end of the tenth wire (19) is connected to the positive electrode of the battery pack (13); the other end of the tenth wire (19) is connected to the positive electrode of the second voltage sensor (16); the negative electrode of the second voltage sensor (16) is connected to one end of the eleventh wire (20); and the other end of the eleventh wire (20) is connected to the negative electrode of the battery pack (13).

[0051] Briefly describe the method of use of the present invention: first install the nano generator set to a suitable position in the hood of an electric vehicle, then start the electric vehicle, and close the device switch after the reading of the first voltage sensor stabilizes to complete the charging process.

[0052] The electric vehicle battery charging device is spatially arranged in a volume of 30259cm 3 The space arrangement method of the box is well known to those skilled in the art. During operation, the electric vehicle can be charged, and 0.027 kW·h of electricity can be charged for each hour. The energy wasted during the operation of the vehicle is fully utilized, and the range of the electric vehicle is increased.

[0053] The preparation and use methods of the friction type nano generator set with 20-40 devices or more of the generators are the same as those of the friction type nano generator set with 50 generators.

[0054] It should be understood that although the terms "first, second ... ... tenth, eleventh" and the like may be used herein to describe various elements, they are only used for descriptive purposes and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, and these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the teachings of the principles of the present invention.

[0055] The representation method used in the electric vehicle battery charging device in this specification is customary and well known to those skilled in the art.

[0056] As described above, the present invention has been described in detail, but it is obvious to those skilled in the art that many variations are possible without departing from the spirit and effects of the present invention. Therefore, such variations should also be included in the protection scope of the present invention.

Claims

1. An electric vehicle battery charging device comprises a nano generator set (1), a first wire (2), an AC / DC inverter (3), a second wire (4), a transformer (5), a third wire (6), a current sensor (7), a fourth wire (8), a charging control switch (9), a fifth wire (10), a bidirectional converter (11), a sixth wire (12), a battery pack (13) connected to a charging port, a seventh wire (14), a first voltage sensor (15), a second voltage sensor (16), an eighth wire (17), a ninth wire (18), a tenth wire (19), and an eleventh wire (20); characterized in that The nanogenerator set (1) is composed of 20-50 friction-type nanogenerators connected in parallel; the positive electrode of the nanogenerator set (1) is connected in series with one end of a first wire (2); the other end of the first wire (2) is connected in series with the positive electrode of an AC\DC inverter (3); the negative electrode of the AC\DC inverter (3) is connected in series with one end of a second wire (4); the other end of the second wire (4) is connected in series with the positive electrode of a transformer (5); the negative electrode of the transformer (5) is connected in series with one end of a third wire (6); the other end of the third wire (6) is connected to the positive electrode of a current sensor (7); the negative electrode of the current sensor (7) is connected to one end of a fourth wire (8); the other end of the fourth wire (8) is connected to the positive electrode of a charging control switch (9); the negative electrode of the charging control switch (9) is connected to one end of a fifth wire (10); the other end of the fifth wire (10) is connected to the positive electrode of a bidirectional converter (11); the negative electrode of the bidirectional converter (11) is connected to the positive electrode of a sixth wire (12); one end of the sixth wire (12); the other end of the sixth wire (12) is connected to the positive electrode of the battery pack (13); the negative electrode of the battery pack (13) is connected to one end of the seventh wire (14); the other end of the seventh wire (14) is connected to the negative electrode of the nano-generator group (1); one end of the eighth wire (17) is connected to the negative electrode of the nano-generator group (1); the other end of the eighth wire (17) is connected to the positive electrode of the first voltage sensor (15); the negative electrode of the first voltage sensor (15) is connected to one end of the ninth wire (18); the other end of the ninth wire (18) is connected to the positive electrode of the nano-generator group (1); one end of the tenth wire (19) is connected to the positive electrode of the battery pack (13); the other end of the tenth wire (19) is connected to the positive electrode of the second voltage sensor (16); the negative electrode of the second voltage sensor (16) is connected to one end of the eleventh wire (20); the other end of the eleventh wire (20) is connected to the negative electrode of the battery pack (13).

2. The specifications of the triboelectric nanogenerator in the electric vehicle battery charging device as claimed in claim 1 are 12mm×12mm×0.7mm; The friction nanogenerator group further comprises 20-50 friction nanogenerators connected in parallel and arranged in a space with a volume of 30252cm 3 -30259cm 3 in the box.

3. The first wire (2), the second wire (4), the third wire (6), the fourth wire (8), the fifth wire (10), the sixth wire (12), the seventh wire (14), the eighth wire (17), the ninth wire (18), the tenth wire (19), and the eleventh wire (20) in the electric vehicle battery charging device as claimed in claim 1 are BV wires with a diameter of 4 mm or 6 mm, that is, copper core polyvinyl chloride insulated cloth wires.

4. The AC\DC transformer (5) in the electric vehicle battery charging device as claimed in claim 1 has a specification model of CH6300-T281 transformer.

5. The inverter in the electric vehicle battery charging device as described in claim 1 has a specification of 454mm×80mm×142mm, a maximum power of 9000W, and is produced by Losdun Inverter Factory.

6. The bidirectional converter in the electric vehicle battery charging device as claimed in claim 1 is Model 62000D, provided by Zhuozheng Electronic Test Instrument Supplier.

7. The specific connection technology and installation method of the nano generator set (1), the first wire (2), the AC\DC inverter (3), the second wire (4), the transformer (5), the third wire (6), the current sensor (7), the fourth wire (8), the charging control switch (9), the fifth wire (10), the bidirectional converter (11), the sixth wire (12), the battery pack (13) connected with the charging port, the seventh wire (14), the first voltage sensor (15), the second voltage sensor (16), the eighth wire (17), the ninth wire (18), the tenth wire (19), and the eleventh wire (20) in the electric vehicle battery charging device as claimed in claim 1 are well known to those skilled in the art.

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