Novel power transmission system with multi-dimensional space visualization

Abstract

The invention provides a novel multi-dimensional spatial visualization power transmission system, which belongs to the technical field of automobile wireless charging, and comprises a public frequency power grid used for providing power frequency alternating current in the power transmission system; the power supply guide rail is used for carrying out wireless transmission power supply on the vehicle on the rail through a transmitting coil and is divided into N guide rail groups, and each guide rail group is divided into n small guide rail sections; each guide rail group is internally provided with one electric energy conversion device, and the electric energy conversion devices are used for converting power frequency alternating current into high-frequency alternating current and injecting the high-frequency alternating current into the power supply guide rails; a group of commutation switches and resonance compensation devices are configured in each guide rail section; and the non-inductive charging vehicle is used for receiving the alternating current transmitted by the power supply guide rail. The magnetic coupling resonant power transmission technology is adopted, rapid wireless charging of the electric vehicle can be achieved, and the charging efficiency is greatly improved; meanwhile, the potential safety hazard of the battery is reduced, the utilization rate of the automobile battery is improved, and the automobile manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of automobile wireless charging, and in particular to a novel power transmission system with multi-dimensional spatial visualization. Background Art

[0002] As the global demand for renewable energy and environmentally friendly travel continues to grow, the electric vehicle (EV) market is expanding rapidly. However, the popularization and widespread use of EVs face some technical challenges, the most prominent of which are the battery life and charging speed. Traditional wired charging methods have many inconveniences, such as insufficient charging facilities and slow charging speed, which to some extent restrict the development of EVs.

[0003] In order to solve these problems, researchers have been exploring new power transmission and storage technologies. The "distance trouble" that electric vehicles bring to people today is a major factor slowing down their development. The main reason for this problem is that the energy density of batteries that can be manufactured at the current technical stage is slowly increasing, so that the driving distance of electric vehicles is not high. Battery replacement technology is also not popularized due to its high price, which brings great trouble to consumers. Summary of the invention

[0004] The present invention mainly provides a novel power transmission system with multi-dimensional spatial visualization to solve the technical problems raised in the above-mentioned background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A new transmission system with multi-dimensional spatial visualization, including:

[0007] Public frequency power grid, used to provide industrial frequency alternating current in the transmission system;

[0008] The power supply rail is used to wirelessly transmit power to the vehicle on the track through the transmitting coil, and is divided into N rail groups, and each rail group is divided into n small rail segments;

[0009] Multiple power conversion devices, each guide rail group is equipped with a power conversion device, which is used to convert the industrial frequency alternating current into high-frequency alternating current and then inject it into the power supply rail;

[0010] Commutation switch and resonance compensation device. Each guide rail section is equipped with a set of commutation switch and resonance compensation device. The resonance compensation device uses the resonance principle to make two or more transmitting and receiving coils with the same resonance frequency resonate at a specific power supply frequency, thereby achieving the purpose of medium-distance wireless power transmission. The commutation switch is used to adaptively switch to the guide rail power supply state according to its own load condition, that is, to realize the hierarchical control of the double-layer multi-level guide rail;

[0011] The inductive charging vehicle is used to receive the alternating current transmitted by the power supply rail.

[0012] Furthermore, in the present invention, the inductive charging vehicle is composed of a driving device, a receiving coil, a battery, and a control unit.

[0013] Furthermore, in the present invention, the battery of the inductive charging vehicle is a lithium-ion battery with high energy density.

[0014] Furthermore, in the present invention, the control unit of the inductive charging vehicle monitors the charging demand and status of the vehicle, and adjusts the output power of the power supply, the strength and frequency of the magnetic field accordingly.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adopts the basic principle of magnetic coupling resonance, converts electrical energy into other forms of relay energy through a transmitter, transmits it over a certain distance, and then converts the relay energy into electrical energy through a receiver to realize wireless charging of the car's power supply;

[0017] (1) The use of magnetic coupling resonant power transmission technology can realize fast wireless charging of electric vehicles, greatly improving the charging efficiency;

[0018] (2) By using the magnetic coupling resonant wireless power transmission system, the current battery technology can continue to be used, and there is no need to further research and develop the battery's energy storage capacity. At the same time, the safety risks of the battery are reduced, the utilization rate of the vehicle battery is improved, and the cost of vehicle manufacturing is reduced;

[0019] (3) Non-contact, one-to-many charging greatly reduces the potential safety hazards caused by poor contact due to frequent plugging and unplugging of data cables;

[0020] (4) Independently develop and produce automotive charging device component technology to reduce costs by approximately 20% to 30%, explore and develop inductive materials for non-conductive charging devices, and improve the battery life of electric vehicles.

[0021] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the system module structure of the present invention;

[0023] Figure 2 This is a power supply display diagram of a double-layer multi-level guide rail mode of the power supply system of the present invention;

[0024] Figure 3 This is a charging demonstration diagram of the non-sensing charging vehicle of the present invention;

[0025] Figure 4This is a diagram showing the traditional single-stage rail mode automotive wireless charging.

[0026] In the figure: 10, public frequency power grid; 20, power supply rail; 30, power conversion device; 40, commutation switch; 50, resonance compensation device; 60, inductive charging vehicle; 61, driving device; 62, receiving coil; 63, battery; 64, control unit. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] For examples, please refer to the attached Figure 1-4 , a new type of transmission system with multi-dimensional spatial visualization, including:

[0031] The public frequency power grid 10 is used to provide industrial frequency alternating current in the power transmission system;

[0032] The power supply rail 20 is used to wirelessly transmit power to the vehicle on the track through the transmitting coil, and is divided into N rail groups, and each rail group is further divided into n small rail segments;

[0033] A plurality of power conversion devices 30, each guide rail group is equipped with a power conversion device 30, which is used to convert the industrial frequency alternating current into high-frequency alternating current and then inject it into the power supply guide rail 20;

[0034] The commutation switch 40 and the resonance compensation device 50 are configured in each guide rail section. The resonance compensation device 50 uses the resonance principle to make two or more transmitting and receiving coils with the same resonance frequency resonate at a specific power supply frequency, thereby achieving the purpose of medium-distance wireless power transmission. The commutation switch 40 is used to adaptively switch to the guide rail power supply state according to its own load condition, that is, to realize the hierarchical control of the double-layer multi-level guide rail;

[0035] The inductive charging vehicle 60 is used to receive the alternating current transmitted by the power supply rail 20 .

[0036] For details, please refer to the attached Figure 1 The inductive charging vehicle 60 is composed of a driving device 61, a receiving coil 62, a battery 63, and a control unit 64;

[0037] The battery 63 of the non-conductive charging vehicle 60 is a lithium-ion battery with high energy density;

[0038] In this embodiment, it should be noted that, on the electric vehicle, the receiving end transfers the received electric energy to the battery 63 for storage. The battery 63 adopts a lithium-ion battery with high energy density and long life to store enough electric energy for the electric vehicle.

[0039] It should also be noted that the driving device 61 is powered by a battery 63 to drive the tram. The tram has a large number of built-in signal sensors. After the signal processing system, the required parameters are selected and compared with the built-in parameters to realize signal feedback. After the control unit 64, the charging and discharging process of the battery 63 is realized. The charging system is composed of a built-in receiving coil 62 of the car and a road transmitting coil. The non-inductive charging is based on the magnetic coupling resonant non-inductive power transmission technology. The magnetic coupling resonant wireless power transmission system is mainly composed of four parts: power circuit, communication, control and power coil. The power is provided by the national power grid. The rectifier inverter circuit on the power supply side provides high-frequency alternating current to the coil. The energy is injected into the transmitting coil after passing through the compensation network. The receiving coil 62 is then transformed into power, and the parameters are identified, and then transmitted to the control unit 64 for use by different loads. In addition to this core system, a series of auxiliary systems such as foreign body detection and coil positioning have been developed to ensure the safety and reliability of the core power transmission.

[0040] Further, in the present invention, the control unit 64 of the inductive charging vehicle 60 monitors the charging demand and status of the vehicle, and adjusts the output power of the power supply, the strength and frequency of the magnetic field accordingly;

[0041] In this embodiment, it should be noted that during the charging process, the control unit 64 monitors the various states of the electric vehicle in real time to ensure smooth charging. The control unit 64 confirms whether the electric vehicle is successfully connected to the charging pile through connection status detection. By monitoring parameters such as current and voltage, the control unit 64 can determine whether the electric vehicle is charging and whether the charging speed is normal. When the electric vehicle is fully charged, the control unit 64 will receive a corresponding signal and automatically stop the charging process to prevent overcharging.

[0042] The control unit 64 can ensure the efficiency and safety of the charging process. Through this magnetically coupled resonant power transmission technology, the electric vehicle can achieve wireless charging while driving or when parked, without the need for traditional wired charging equipment, thereby greatly improving the convenience and efficiency of charging.

[0043] Wireless charging or wireless power supply technology is a technology that uses radio waves or electromagnetic fields as carriers to charge power batteries in free space. Compared with the previously widely used direct contact charging technology, wireless charging technology can not only reduce or even save the cost of direct connection devices such as power cords, but also cleverly avoid the wear or electric shock caused by repeated plugging and unplugging of wires during use, and apply multiple characteristics such as freedom, convenience and safety to power transmission. Wireless charging technology has the characteristics of high adaptability, high reliability and high safety when transmitting energy, and will not be affected by changes in the external environment. It can meet people's needs for car charging in today's rapid urban development. The new power storage system realizes wireless charging through magnetic coupling resonant power transmission technology, thereby eliminating the limitations brought by wired charging methods. As a green and environmentally friendly way of travel, electric vehicles are of great significance to reducing fossil fuel consumption, reducing greenhouse gas emissions and improving air quality.

[0044] Traditional automobile wireless charging is mostly a single-stage rail mode. For the single-stage rail power supply mode, when the system is working, there is only one rail and a set of primary power conversion devices 30 in the primary circuit. Figure 4 shown.

[0045] Depend on Figure 4 It can be seen that the single-stage rail power supply mode has a simple structure and is easy to control and maintain. However, since the rail structure is a single long rail, it also has the following disadvantages:

[0046] ① When the number of cars running on the guide rail is small, the transmission efficiency of the system will be very low;

[0047] ②The system is very unstable and sensitive to parameter changes. Any slight parameter change may cause the system to fail to operate stably.

[0048] The present invention adopts a double-layer multi-level rail mode, changing N rail sections into N rail groups, and in each rail group there is only one set of power conversion device 30 to convert industrial frequency AC power into high-frequency AC power and then inject it into the power supply rail 20. Each rail group is further divided into n small rail sections, and these n small rail sections are equipped with their own resonance compensation devices 50 and commutation switches 40, which adaptively switch to the rail power supply state according to their own load conditions, that is, the hierarchical control of the double-layer multi-level rail is realized, as shown in the attached figure. Figure 2 shown.

[0049] The double-layer multi-level guide rail mode has the following advantages:

[0050] ① It realizes time-sharing and segmented power supply of the guide rail, reduces system loss and improves system transmission efficiency;

[0051] ② The number of electric energy conversion devices 30 is small, which is easy to control and maintain;

[0052] ③ The power level of the electric energy conversion device 30 is small, which reduces the requirements for electronic devices;

[0053] ④Reduces the system's sensitivity to parameter changes and improves the system's stability.

[0054] The magnetically coupled resonant wireless power transmission system is mainly composed of four parts: power circuit, communication, control and control coil. It uses the resonance principle to make two or more transmitting and receiving coils 62 with the same resonant frequency resonate at a specific power frequency, thereby achieving the purpose of medium-distance wireless power transmission. When the resonant coil parameters resonate, the system has a higher energy transmission efficiency, which can achieve efficient medium-distance power transmission and ensure a higher transmission efficiency. Magnetic coupling wireless charging technology is currently the wireless charging technology commonly chosen by major manufacturers. The principle is that the power plant's electric energy is transmitted in the form of electric power between the primary and secondary induction coils inside and outside the car in the form of magnetic field coupling; the biggest feature of this technology is that it can transmit energy at a higher frequency.

[0055] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A new transmission system with multi-dimensional spatial visualization, characterized by: include: A public frequency power grid (10), used for providing industrial frequency alternating current in the power transmission system; A power supply rail (20) is used to wirelessly transmit power to vehicles on the track through a transmitting coil, and is divided into N rail groups, and each rail group is further divided into n small rail segments; A plurality of electric energy conversion devices (30), each guide rail group being equipped with one electric energy conversion device (30), used for converting industrial frequency alternating current into high frequency alternating current and then injecting the high frequency alternating current into the power supply guide rail (20); A commutation switch (40) and a resonance compensation device (50), each guide rail section is provided with a group of commutation switches (40) and resonance compensation devices (50), the resonance compensation device (50) uses the resonance principle to make two or more transmitting and receiving coils with the same resonance frequency resonate at a specific power supply frequency, thereby achieving the purpose of medium-distance wireless power transmission, and the commutation switch (40) is used to adaptively switch to the guide rail power supply state according to its own load condition, that is, to realize hierarchical control of the double-layer multi-level guide rail; The inductive charging vehicle (60) is used to receive the alternating current transmitted by the power supply rail (20).

2. The novel multi-dimensional space visualization power transmission system according to claim 1 is characterized in that: The inductive charging vehicle (60) is composed of a driving device (61), a receiving coil (62), a storage battery (63), and a control unit (64).

3. The novel multi-dimensional space visualization power transmission system according to claim 2 is characterized in that: The storage battery (63) of the non-conductive charging vehicle (60) is a lithium-ion battery with high energy density.

4. The novel multi-dimensional space visualization power transmission system according to claim 2 is characterized in that: The control unit (64) of the inductive charging vehicle (60) monitors the charging demand and status of the electric vehicle, and adjusts the output power of the power supply, the strength and frequency of the magnetic field accordingly.

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