KR20110068621A - Device for recharging batteries on electric vehicle or hybrid vehicle wirelessly by means of electromagnetic coupled resonance and method thereof - Google Patents

Abstract

PURPOSE: A device and method for wirelessly charging a battery of an electric vehicle or hybrid vehicle by an electromagnetic coupled resonance are provided to transmit and receive power without a wired cable by using the electromagnetic coupled resonance. CONSTITUTION: A high frequency generator(22) generates a high frequency. A high frequency power amplifier(24) amplifies the high frequency from the high frequency generator and transmits the high frequency to a transmission loop antenna(21). A transmission loop antenna generates an electromagnetic wave by receiving high frequency amplified by the high frequency power amplifier. A transmission resonator(23) transmits power by generating an evanescent wave. A reception resonator generates the electromagnetic wave by mutually resonating with the transmission resonator.

Description

DEVICE FOR RECHARGING BATTERIES ON ELECTRIC VEHICLE OR HYBRID VEHICLE WIRELESSLY BY MEANS OF ELECTROMAGNETIC COUPLED RESONANCE AND METHOD THEREOF}

The present invention relates to a charging device and a method using a wireless power transmission, and more particularly, by receiving the power transmitted from the wireless power transmission device using the principle of electromagnetic sensitive resonance in a wireless power receiver having the same frequency electric vehicle Or an apparatus and method for wirelessly charging a battery of a hybrid vehicle.

Conventional cars used petroleum fuel, such as gasoline and diesel, but in recent years, electric vehicles that can be driven by electricity have emerged. An electric vehicle refers to a vehicle that uses an electric battery and an electric motor without using petroleum fuel and an engine, and refers to a vehicle that drives a vehicle by rotating the motor with electricity accumulated in the battery. This has not been put to practical use due to the heavy weight of the battery and the time required for charging, but has recently been re-developed due to the serious pollution problem.

In addition, hybrid vehicles using electric motors and internal combustion engines have emerged, which can be installed at the same time as conventional combustion vehicles such as simultaneously installing internal combustion engines and battery engines of electric vehicles or minimizing air resistance by dramatically reducing the weight of the vehicle body. Compared to cars that have reduced fuel consumption and harmful gas emissions. It replaces gasoline fuel use part of car energy use by charging electric energy with battery. It combines the advantages of gasoline engine and electric engine, and operates the gasoline engine and electricity automatically to suit the road and surrounding environment. It is designed to convert the engine.

Conventionally, the battery of an electric vehicle and a hybrid vehicle is charged by transferring power to a cable using a wired plug. This is a way to charge the electric car by connecting the electric cable to the car's battery plug to stop the electric car in the parking lot. This method was cumbersome for people to connect the cable directly.

Accordingly, a method of transmitting and receiving power wirelessly has been devised, and the conventional short-range wireless power transmission technology can be divided into three types. First, when the coil is wound several times and a high frequency current flows to the coil, the magnetic field is strongly induced in one direction. When the coil resonating at a similar frequency is very close, coupling occurs and power is transmitted. However, such a magnetic coupling method has a disadvantage in that transmission efficiency is poor and power transmission is possible only at a very close distance, and transmission is difficult even when the angle is slightly changed. Secondly, it is an electromagnetic radiation method in which radiation occurs while an electric field and a magnetic field that change with time influence each other using an antenna such as a monopole or a horn antenna. This method can receive power according to the polar characteristics of the incident wave when there is an antenna of the same frequency. However, since electromagnetic radiation transmits power in all directions, power transmission efficiency is very low, and strong radiation power has a disadvantage of harming the human body. Third, the magnetic field coupling method using the dielectric resonator is capable of transmitting power farther than the magnetic field coupling method, and the efficient wireless power transmission method should be used, but the expensive dielectric resonator should be manufactured and used, compared to the coupling coil resonator method. There is a disadvantage that the efficiency is somewhat reduced.

Therefore, it is difficult to charge a battery of an electric vehicle or a hybrid vehicle by the wireless power transmission method.

The present invention has been proposed to solve the above problems, by using a wireless power transmission and reception device with the same frequency to transmit and receive power by electromagnetic sensitive resonance, it is possible to send and receive power without wired cable directly connect the power cable It is an object of the present invention to provide an apparatus and a method for automatically recharging a battery of a vehicle without using the same.

The present invention provides a wireless power transmitter comprising a transmission loop antenna for receiving electromagnetic waves and generating electromagnetic waves, and a transmission resonator formed at one side of the transmission loop antenna to generate attenuated waves to transmit power; A wireless power receiver comprising a reception resonator which is spaced apart from the wireless power transmission device and mutually resonates with the transmission resonator to induce electromagnetic waves, and a reception loop antenna positioned at one side of the reception resonator to receive power. Provided is a wireless power charging device for automatically charging a battery of an electric vehicle or a hybrid vehicle according to the electromagnetic sensitive resonance.

In addition, the wireless power transmitter of the present invention is characterized in that it further comprises a high-frequency generator for generating a high frequency, and a high-frequency power amplifier to amplify the high frequency generated in connection with the high frequency generator to transmit to the transmission resonator.

The wireless power receiver of the present invention further includes a power receiver connected to the receiving loop antenna to receive the received power, and a rectifier connected to the power receiver to convert the received power into direct current to charge the converted current. Characterized in that it comprises a.

In addition, the transmission resonator or the reception resonator of the present invention is characterized in that the copper wire or coil form or snail or made of a dielectric.

In addition, the diameter of the transmission resonator or the reception resonator of the present invention is characterized in that less than 3m.

In addition, the present invention is characterized in that the frequency range of the high frequency is 4MHz ~ 600MHz.

In addition, the wireless power transmitter of the present invention is installed on the floor, the ceiling, the wall of the parking lot, characterized in that it is covered with a rubber waterproofing, the wireless power receiver is installed on the floor, ceiling or trunk of the car It is done.

In addition, the present invention comprises the steps of generating an electromagnetic wave in a transmission loop antenna supplied with a high frequency, and transmitting power by generating an attenuation wave by a transmission resonator located on one side of the transmission loop antenna by the generated electromagnetic wave; And inducing electromagnetic waves by mutual resonance between the transmission power and the reception resonator spaced apart from the transmission resonator, and receiving the induced electromagnetic waves in a reception loop antenna located at one side of the reception resonator. It provides a wireless power charging method for automatically charging a battery of an electric vehicle or a hybrid vehicle according to the electromagnetic sensitive resonance.

In addition, the step of generating the electromagnetic wave of the present invention is characterized in that it further comprises the step of generating a high frequency in the high frequency generator, the step of power amplifying the generated high frequency by a high frequency power amplifier and transmits to the transmit loop antenna.

The receiving of the reception loop antenna may further include converting power received by a rectifier connected to the reception loop antenna into direct current and charging the battery.

According to the present invention, when a vehicle having a wireless power receiver is installed in a parking lot in which a wireless power transmitter is installed, the wireless power transmitter wirelessly transmits power, and the transmitted power is wirelessly installed in the vehicle. The large power is automatically received by the power receiving device, and the received power is charged to the battery through the rectification process, so that there is no need for a person to directly connect a wired cable to a plug. It works.

The present invention relates to an apparatus and method for automatically charging a battery of an electric vehicle or a hybrid vehicle by a wireless power transmission method while a vehicle is stopped in a parking lot without a driver directly connecting a power cable.

Hereinafter, described in detail with reference to the accompanying drawings.

1 shows a structure of a coil type, a snail type, and a dielectric resonator as a structure of a transmission / reception resonator according to the present invention, FIG. 2 shows a structure of electromagnetic waves including a transmission resonator, and FIG. 3B is a power transmission structure by two adjacent snail resonators according to the present invention, FIG. 4 is a configuration of a wireless power transmission apparatus and a parking lot arrangement according to the present invention, and FIG. 5A is an embodiment of the present invention. Vehicle equipped with a wireless receiving apparatus according to the present invention, Figure 5b shows a configuration of a wireless receiving apparatus according to the present invention.

First, Electromagnetic Coupled Resonance (ECR), which is the basis of the present invention, means that electricity is transferred to the other side while the same magnetic field is formed when electricity is supplied between two objects having the same frequency magnitude. It is similar to the phenomenon that when you hit one tuning fork, the other tuning fork is nearby.

2 shows an electromagnetic wave forming structure including a coupling resonator. Since the field shapes of the electromagnetic waves of the coil resonators 13 and 23 and the loop antennas 11 and 21 are similar, the coil resonators 13 and 23 resonate inside the coil resonators 13 and 23. This occurs, and outside the coil resonators 13 and 23, an attenuating wave is generated in which the signal decreases exponentially in the direction parallel to the coil resonators 13 and 23. Therefore, the wireless power transmission can be efficiently performed by using the attenuation waves generated by the coil resonators 13 and 23 for the short range wireless power transmission. The same is true of dielectric resonators made by cutting a cylindrical dielectric.

FIG. 3A shows a power transmission structure by two adjacent coil resonators. The electromagnetic waves generated by the transmission loop antenna 11 generate attenuation waves through the transmission resonator 13, and another receiving resonator 33 at a short distance. If is present, the two coupling resonators 13 and 33 resonate with each other, electromagnetic waves are induced in the reception resonator 33, and power is received by the reception loop antenna 31. This method uses electromagnetic sensitive resonance, and power is transmitted when two coupling resonators 13 and 23 mutually resonate.

In addition, Figure 3b shows a power transmission structure by two adjacent snail resonator, the same as the coil type resonator, the electromagnetic wave generated in the transmission loop antenna 21 generates attenuation wave through the resonator 23 If there are other receiving resonators 43 at a short distance, the two coupling resonators 23 and 43 may mutually resonate to induce electromagnetic waves in the receiving resonator 43 and receive power to the receiving loop antenna 41. . The power transmission structure of the coil or snail resonator is the same in the resonator made of a dielectric.

In other words, when the wireless power generated by the transmission loop antennas 11 and 21 is radiated through the transmission resonators 13 and 23, the reception resonators 33 and 43 having the same resonant frequency located at near distances generate resonances due to electromagnetic fields. Power is being sent and received. At this time, if the transmission and reception resonators are located at a long distance from each other, power transmission is difficult. Therefore, electromagnetic sensitive resonance technology can be utilized as a technique for transmitting a large power to a wireless receiving device at a distance of several tens of meters. When the high frequency amplified through the transmission resonators 13 and 23 is radiated, the reception resonators 33 and 43 which are the same size as the transmission resonators 33 and 43 and have the same vibration frequency are in the magnetic field region of the transmission resonators 13 and 23. If so, electromagnetic resonance resonance (ECR) occurs and power is transmitted and received.

The same principle can be achieved by installing a wireless power receiver on the bottom, ceiling, or trunk of an electric or hybrid vehicle, and installing a wireless power transmitter on the floor, ceiling, or wall of a parking lot. The present invention relates to this.

Hereinafter, the configuration of the present invention.

Coil, snail, and dielectric resonators are used for the transmission and reception resonators of the present invention. The dielectric resonators have the same effects as the coil or snail resonators, and will be described below with reference to the coil and snail resonators. . The dielectric resonator is a resonator made by cutting a cylindrical dielectric.

The present invention relates to a technique for charging a battery of an electric vehicle or a hybrid vehicle by a wireless power transmission method by a contactless method by electromagnetic sensitive resonance,

A high frequency generator 22 for generating a high frequency, a high frequency power amplifier 24 for amplifying a high frequency generated in connection with the high frequency generator 22 and transmitting the amplified high frequency to the transmission loop antennas 21 and 31, and the high frequency power amplifier ( 24 are connected to the transmission loop antennas 21 and 31 for generating electromagnetic waves by receiving the amplified high frequency, and attenuated waves are generated at one side of the transmission loop antennas 21 and 31 at intervals of several mm. And a wireless power transmitter (10, 20) and a wireless power transmitter (10, 20) installed on the floor, the ceiling or the wall of the parking lot and transmit the power to the transmission resonator (13, 23) for transmitting power Receiving resonators 33 and 43 for generating electromagnetic waves by mutual resonance with the resonators 13 and 23, and receiving electromagnetic waves generated by being located at one side with a distance of several mm from the receiving resonators 33 and 43. Receive loop antennas 31 and 41, and The power receiver 45 is connected to the reception loop antennas 31 and 41 to receive the received power, and is connected to the power receiver 45 to convert the received power into direct current to convert the current converted into a battery 49. It is composed of a rectifier (48) to charge in a) is composed of a wireless power receiver 30, 40 installed on the floor, ceiling, trunk of the vehicle (1).

At this time, as shown in FIG. 1, the structure of the coupling resonator may be manufactured in the form of a coil or a snail with a copper wire, may be manufactured using a dielectric, and the number of rotation turns according to the frequency used for power transmission (coil Length) can be designed to be variable, and a desired coil resonator can be manufactured as needed. However, the snail resonator structure is more advantageous for flat installation on the floor of the parking lot and the bottom of the car, the ceiling or the trunk.

The diameter of the resonator should be less than 3m. If it exceeds 3m, mounting becomes difficult due to space limitations. Preferably it is good to use to produce about 50cm. And, the frequency of the high frequency used in the present invention is used in the range of 4MHz ~ 600MHz, when the frequency of the high frequency is less than 4MHz, the size of the antenna has to be large, if the frequency exceeds 600MHz the transmission distance is shortened This is because the antenna may not work. In addition, since the wireless power transmitter is exposed to the outside causing damage due to external influences such as water, the wireless power transmitter is installed on the floor, ceiling, or wall of the parking lot, and the surface of the wireless power transmitter is covered with rubber to be waterproofed. Do

The transmit / receive resonators 13, 23, 33, 43 and the transmit / receive loop antennas 11, 21, 31, and 41 are positioned at intervals of several mm, respectively. The transmission efficiency can be adjusted by adjusting the interval between the transmission and reception resonators 13, 23, 33, 43. Therefore, the designer can change the distance between the resonator and the antenna in accordance with the desired frequency or the characteristics of the wireless power system, and the number of turns of the resonator is determined according to the transmission frequency used for the wireless power. Therefore, in consideration of these matters, a coil having a desired size can be manufactured. In other words, when a coil of small size is required, the number of turns may be increased or the coil interval may be narrowed.

In addition, the distance between the transmission resonators 13 and 23 and the reception resonators 33 and 43 can be operated even within a distance of 5 m, which is closely related to the size of the frequency and the size of the antenna.

Hereinafter, the operation sequence will be described based on the snail resonator of the present invention. However, this also applies to the coil type resonator or the dielectric resonator.

4 shows a structure in which the transmission resonator 23 and the transmission loop antenna 21 of the wireless power transmitter 20 by the electromagnetic sensitive resonance method are installed on the floor of a car parking lot. The transmission resonator 23 and the transmission loop antenna 21 constituting the power transmission device are installed on the floor by waterproofing flatly. When the vehicle 1 is stopped thereon, the high frequency generated by the high frequency generator 22 is a high frequency power amplifier. Amplified by 24 is transmitted to the transmit loop antenna 21. The transmission resonator 23 and the transmission loop antenna 21 emit strong power wirelessly.

FIG. 5 relates to a vehicle 1 and a wireless power receiver 40 in which a wireless power receiver 40 is installed by an electromagnetic sensitive resonance method installed in an electric vehicle. When you stop, you will be charged in the following order. Power transmitted by the power transmission resonator 23 mutually resonates with the reception resonator 41 installed on the floor, the ceiling, or the trunk of the vehicle, thereby inducing electromagnetic waves. The induced electromagnetic waves are transmitted to the receive loop antenna 41. The transmitted electromagnetic wave is transmitted to the power receiver 47. Power transmitted to the power receiver 47 is rectified to DC in the AC / DC rectifier 48. The rectified current is transferred to the rechargeable battery 49 to be charged. That is, while the vehicle is stopped in the parking lot, the vehicle rechargeable battery 49 is automatically charged by the wireless power transmission method, and the driver does not need to worry about charging the battery.

1 is a structure of a transmission and reception resonator used in the present invention,

2 is an electromagnetic wave forming structure including a transmission resonator,

3a is a power transmission structure by two adjacent coil resonators in accordance with the present invention;

3b is a power transmission structure by two adjacent snail resonators according to the present invention,

4 is a configuration and parking lot layout of the wireless power transmitter according to the present invention;

Figure 5a is a vehicle equipped with a wireless receiving apparatus according to the present invention,

5b is a block diagram of a wireless receiving apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

1: car 3: parking line

10: coil type wireless power transmitter 11: transmit loop antenna

13: coil resonator 15: power supply

20: cochlear wireless power transmitter 21: transmission loop antenna

22: high frequency generator 23: cochlear transmission resonator

24: high frequency amplifier 25: power supply

30: coil type wireless power receiver 31: receiving loop antenna

33: coil-type receiving resonator 35: power receiver

40: snail-type wireless power receiver 41: receiving loop antenna

43: cochlear receiving resonator 45: power receiver

47: power receiver 48: rectifier

49: battery

Claims (11)

A wireless power transmitter comprising a transmission loop antenna for receiving electromagnetic waves and generating electromagnetic waves, and a transmission resonator formed at one side of the transmission loop antenna to generate attenuated waves to transmit power; A wireless power receiver comprising a reception resonator which is spaced apart from the wireless power transmission device and mutually resonates with the transmission resonator to induce electromagnetic waves, and a reception loop antenna positioned at one side of the reception resonator to receive power. Wireless power charging device for automatically charging a battery of an electric vehicle or a hybrid vehicle according to the electromagnetic sensitive resonance. The method of claim 1, The wireless power transmitter further comprises a high frequency generator for generating a high frequency, and a high frequency power amplifier for amplifying the high frequency generated in connection with the high frequency generator and transmitting to the transmission resonator. Wireless power charging device that automatically charges the battery of an electric vehicle or a hybrid vehicle. The method of claim 1, The wireless power receiver further comprises a power receiver connected to the receiving loop antenna to receive the received power, and a rectifier connected to the power receiver to convert the received power into direct current to charge the converted current. Wireless power charging device for automatically charging a battery of an electric vehicle or a hybrid vehicle according to the electromagnetic sensitive resonance. The method of claim 1, The transmission resonator or the reception resonator is a wireless power charging device for automatically charging a battery of an electric vehicle or a hybrid vehicle by electromagnetic sensitive resonance, characterized in that the copper wire or snail-shaped or made of a dielectric. The method of claim 1, And a diameter of the transmission resonator or the reception resonator is 3 m or less, wherein the wireless power charging device automatically charges a battery of an electric vehicle or a hybrid vehicle according to electromagnetic resonance. The method of claim 1, The high frequency frequency range of 4MHz ~ 600MHz wireless power charging device for automatically charging the battery of an electric vehicle or a hybrid vehicle by electromagnetic sensitive resonance. The method of claim 1, The wireless power transmitter is installed on the floor, ceiling, wall of the parking lot, the wireless power charging device for automatically charging the battery of the electric vehicle or hybrid vehicle according to the electromagnetic sensitive resonance, characterized in that the waterproofing covered with a rubber. The method of claim 1, The wireless power receiver is a wireless power charging device for automatically charging a battery of an electric vehicle or a hybrid vehicle by electromagnetic sensitive resonance, characterized in that installed on the lower floor, ceiling or trunk of the vehicle. Generating an electromagnetic wave from a high frequency supplied transmission loop antenna, Generating attenuation waves by a transmission resonator located at one side of the transmission loop antenna by the generated electromagnetic waves, and transmitting power; Inducing the electromagnetic wave by mutual resonance of the transmitted power with the reception resonator spaced apart from the transmission resonator; Wireless charging method for automatically charging a battery of an electric vehicle or a hybrid vehicle according to the electromagnetic sensitive resonance, characterized in that it comprises the step of receiving the induced electromagnetic wave in the receiving loop antenna located on one side of the receiving resonator. 10. The method of claim 9, The generating of the electromagnetic wave may further include generating a high frequency in a high frequency generator, and amplifying the generated high frequency by a high frequency power amplifier and transmitting the generated high frequency to a transmission loop antenna. Wireless power charging method that automatically charges the battery of an electric vehicle or a hybrid vehicle. 10. The method of claim 9, Receiving at the receive loop antenna of the electric vehicle or hybrid vehicle according to the electromagnetic sensitive resonance, characterized in that further comprising the step of converting the power received by the rectifier connected to the receive loop antenna into a direct current to charge the battery Wireless power charging method to automatically charge the battery.

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