CN210212066U - Automatic wireless charging system of capacitive coupling type electric automobile - Google Patents

Automatic wireless charging system of capacitive coupling type electric automobile Download PDF

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Publication number
CN210212066U
CN210212066U CN201921306471.XU CN201921306471U CN210212066U CN 210212066 U CN210212066 U CN 210212066U CN 201921306471 U CN201921306471 U CN 201921306471U CN 210212066 U CN210212066 U CN 210212066U
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transmitting
unit
receiving
communication controller
power supply
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Inventor
Zhe Wang
王哲
Jun Lu
陆钧
Fanbo He
贺凡波
Junjie Ge
葛俊杰
Junchao Ma
马俊超
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Hefei Yougan Technology Co.,Ltd.
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Beijing Invispower Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Automatic wireless charging system of capacitive coupling formula electric automobile includes: the charging transmitting platform and the vehicle-mounted receiving equipment; the transmission platform that charges includes: the device comprises a transmitting unit, a transmitting power supply cabinet, a mechanical arm and a movable chassis; the tail end of the mechanical arm is arranged above the transmitting power supply cabinet; the transmitting power supply cabinet is arranged above the movable chassis; the transmitting unit is arranged at the front end of the mechanical arm, and a radio frequency reader, a photoelectric switch transmitter and two transmitting polar plates are arranged at the center of the transmitting unit; the utility model discloses need not to realize the alignment between the coupling mechanism of transmitting terminal and receiving terminal through manual driving or automatic parking, only need to wait that the electric automobile who charges stops appointed parking stall position, just can accomplish above-mentioned action through the multi freedom arm that charges the transmission platform and carry with and to solved the wireless charging of electric automobile and needed the coil to aim at, operate inconvenient problem, can guarantee the safe operation of system and can obtain very high transmission efficiency again.

Description

Automatic wireless charging system of capacitive coupling type electric automobile
Technical Field
The utility model belongs to the technical field of the wireless charging technique of electric automobile and specifically relates to an automatic wireless charging system of capacitive coupling formula electric automobile.
Background
The non-contact wireless charging technology has the characteristics of automation, convenience, safety and the like, and the problems caused by a contact wired charging mode of the electric automobile can be solved by adopting wireless charging; the existing wireless charging of the electric automobile generally adopts a magnetic field coupling type wireless power transmission technology, a high-frequency alternating current is applied to a transmitting coil arranged on the ground to generate an alternating magnetic field, a receiving coil arranged on the electric automobile induces and generates a high-frequency alternating current under the action of the high-frequency alternating magnetic field, and then the high-frequency alternating current is converted into a direct current through a rectifier and is transmitted to an automobile storage battery for charging; the magnetic field coupling type wireless charging technology has the advantages of large transmission power, long transmission distance, high efficiency and the like;
however, the magnetic field coupling wireless charging system often has the following disadvantages, which hinder the development and popularization of the wireless charging technology, for example:
① the transmitting and receiving coils need to be made of metal litz wires and ferrite materials, which results in large volume and heavy weight of the coils and also increases the investment cost;
② installation and embedding of the transmitting coil requires certain civil construction on the parking space, installation of the receiving coil requires modification of the electric automobile, even the whole automobile generally needs to be redesigned, and the load of the automobile is increased by installing the receiving coil;
③ in the wireless charging process, the high power transmission may generate some magnetic field leakage and electromagnetic interference, if the metal foreign body can not be identified in the transmission magnetic field, the foreign body temperature will rise due to the eddy current effect, even the inflammable substance will be ignited to cause fire, therefore the existing technology still has some potential safety hazard problems to be overcome, the electromagnetic leakage will pollute the ecological environment, and the health of people will be badly affected.
In the existing wireless charging technology, when the alignment positions of a transmitting coil and a receiving coil are deviated, the magnetic field coupling type wireless charging technology can cause the reduction of transmission efficiency and the generation of magnetic field leakage inductance, and even can not work; in the existing wireless charging technology, a small coil for auxiliary sensing is generally installed on a receiving coil or a transmitting coil, an excitation detection magnetic field is generated by the transmitting coil or the receiving coil, and the magnetic field is detected by detecting the change of voltage, current and the like of the auxiliary coil, so that the relative position between the receiving coil or the transmitting coil is obtained; the driver of the electric automobile or the parking system is guided to stop the vehicle in a charging area allowed by the parking through the detection of the relative position and the data transmission, and the alignment of the receiving coil and the transmitting coil is completed.
Because of the restriction of the national standard on the safety control limit value of the electromagnetic environment, the transmitted magnetic field intensity when the coil of the wireless charging of the electric automobile guides the alignment is very small, the magnetic field signal generated by a closed coil such as a transmitting coil has rapid attenuation (inversely proportional to the third power of the distance) with the increase of the distance, is easily influenced by magnetic substances in the field or the surrounding environment, such as interference of metallic objects and materials or other parking vehicles, the range of action detected in this way is only evident in the vicinity of the source of the magnetic field, the driver or the parking system does not have sufficient operating space and reaction time to adjust the vehicle travel route when obtaining reliable position detection data, this puts high demands on the operator or the parking system, and even then the alignment of the coils cannot be completed correctly, which greatly reduces the experience and popularity of wireless charging. For the capacitive coupling wireless charging adopting the small-sized polar plate, the existing scheme has no effective mode for realizing the alignment between the transmitting and receiving polar plates.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an automatic wireless charging system of capacitive coupling formula electric automobile, adopt frivolous conductor to constitute coupling capacitance as transmitting polar plate and receiving polar plate, realize the wireless charging of capacitive coupling formula based on electric field transmission electric energy, adopt the transmission platform that charges that carries the multi freedom arm, combine long-range radio frequency location, and adopt photoelectric switch to accomplish the accurate positioning between the transmitting and receiving polar plate of the mode that finally verifies, realize automatic wireless charging at the alignment condition that does not need artifical driving or vehicle parking system to implement coupling mechanism, and possess the function that a pair of many charges according to the order for many electric automobiles.
Automatic wireless charging system of capacitive coupling formula electric automobile includes: the charging transmitting platform and the vehicle-mounted receiving equipment;
further, the charging and transmitting platform comprises: the device comprises a transmitting unit, a transmitting power supply cabinet, a mechanical arm and a movable chassis; the tail end of the mechanical arm is arranged above the transmitting power supply cabinet; the transmitting power supply cabinet is arranged above the movable chassis; the transmitting unit is arranged at the front end of the mechanical arm, and a radio frequency reader, a photoelectric switch transmitter and two transmitting polar plates are arranged at the center of the transmitting unit;
by way of illustration, the transmission power supply cabinet includes: the device comprises an outer shell, a power supply, a PFC unit, an inversion unit, a transmission resonance unit, a compensation network and a transmission communication controller, wherein the power supply, the PFC unit, the inversion unit, the transmission resonance unit, the compensation network and the transmission communication controller are arranged in the outer shell;
as an illustration, the transmitting power supply cabinet can also be mounted on one side of the mechanical arm in a hanging manner;
as an example, the mechanical arm is a multi-degree-of-freedom cooperative robot, and the cooperative robot has the advantages that the mechanical arm can interact with human in a close range in a common space, and the action of the mechanical arm does not consider the safety protection when human moves in a charging area;
as an illustration, the PFC unit includes: the power frequency alternating current input from the outside is sent to the PFC unit through a power supply, and is converted into direct current through rectification and filtering; the direct current is transmitted to the transmitting inversion unit and then inverted into high-frequency alternating current, then the high-frequency alternating current is boosted through the transmitting resonance unit, and the high-frequency high-voltage alternating current is applied to the transmitting polar plate through the compensation network;
as an example, the compensation network is used for tuning LC resonance formed between the coupling capacitance and the inductance of the resonance unit to improve transmission power and efficiency;
as an application example, the compensation network may adopt one of voltage series resonance compensation, current parallel resonance compensation or composite resonance compensation;
further, the vehicle-mounted receiving apparatus is mounted on an electric vehicle, and includes: the device comprises a receiving resonance unit, a rectifying unit, a power battery, a direct current converter, a storage battery, a receiving communication controller and a receiving unit;
further, the receiving unit is provided with a photoelectric switch receiver, four active radio frequency tags and two receiving polar plates, wherein the four active radio frequency tags are respectively arranged at the upper left corner, the lower left corner, the upper right corner and the lower right corner of the receiving unit; the receiving communication controller is in communication connection with a vehicle control unit of the electric vehicle through a CAN bus, and receives information instructions of the vehicle;
as an illustration, the receiving communication controller and four active radio frequency tags are powered by the storage battery;
as an example, a coupling capacitor is formed between the transmitting electrode plate and the receiving electrode plate by aligning the transmitting unit and the receiving unit, two coupling capacitors formed by the two transmitting electrode plates and the two receiving electrode plates are communicated with a live line and a zero line in a single-phase alternating current loop, and under the action of high-frequency high-voltage alternating current, the alternating current is transmitted to the receiving electrode plate through the transmitting electrode plate, so that wireless transmission of electric energy is realized; the high-frequency alternating current transmitted to the receiving polar plate is sent to a rectifying unit after passing through a receiving resonance unit, the alternating current is converted into direct current after being rectified, and the direct current is transmitted to a power battery on an automobile to charge the electric automobile; the direct current of the power battery is converted into low-voltage direct current through a direct current converter to charge a storage battery; when the charging and transmitting platform is positioned, the storage battery supplies power to the receiving and communicating controller, the radio frequency tag and the photoelectric switch receiver, and the storage battery continues to supply power to the receiving and communicating controller in the charging process.
Furthermore, a processing unit with data processing capability and a wireless communication unit are arranged in each of the receiving communication controller and the transmitting communication controller, and the transmitting communication controller and the receiving communication controller can perform wireless communication between data through the built-in wireless communication units;
as an illustration, the wireless communication employs: one of Wi-Fi, Zigbee, Bluetooth, millimeter wave or ultra wide band communication modes;
as an illustration, the receiving unit is installed on the side, head, tail, roof or underbody of the body of the electric vehicle, such as the position of the bumper and the license plate of the vehicle;
as an example, the housings of the transmitting unit and the receiving unit are made of an insulating material;
as an example, the transmitting electrode plate and the receiving electrode plate are made of one or a combination of copper foil, aluminum foil or carbon material;
as another example, the transmitting plate and the receiving plate may also be thin film electrodes made of conductive polymer, and in order to increase the capacitance and maintain good insulation between the transmitting plate and the receiving plate, the transmitting plate and the receiving plate are encapsulated inside an insulating material;
as an example of an application, the insulating material is: one or a combination of glass, ceramic laminate, barium titanate and titanium dioxide;
to better explain the design principle of the present invention, the working process is briefly introduced as follows:
step one, when the electric automobile needs to be charged due to low electric quantity, the electric automobile enters a chargeable area, the electric automobile sends a charging instruction, searches communication signals through a receiving communication controller, and establishes communication with a transmitting communication controller; the electric automobile parks in a certain parking space in the chargeable area range, one side provided with the receiving unit is close to a moving channel of the charging transmitting platform, and the electric automobile sends a charging request to the transmitting communication controller through the receiving communication controller;
step two, when the transmitting communication controller receives a charging request and the charging transmitting platform is in an idle state, the transmitting communication controller sends a command for confirming that charging can be carried out to the receiving communication controller, the receiving communication controller sends coding information of four radio frequency tags to the transmitting communication controller, and each radio frequency tag corresponds to a binary code;
four active radio frequency tags of a receiving unit send out coding information of the four radio frequency tags through built-in transmitting antennas, wherein the radio frequency signals comprise binary codes of the radio frequency tags;
thirdly, the transmitting communication controller controls the mechanical arm to adjust the transmitting unit at the front end to be vertical to the space plane and withdraw the mechanical arm;
step four, a radio frequency reader of the transmitting unit receives radio frequency signals sent from each active radio frequency tag, demodulates and decodes the received radio frequency signals, determines the coding information of the radio frequency tags corresponding to the signals, and measures the signal intensity of the radio frequency tags in sequence;
after receiving the radio frequency signal, the radio frequency reader of the transmitting unit sends the radio frequency signal intensity data of each active radio frequency tag to the transmitting communication controller, the transmitting communication controller judges the distance d between the transmitting unit and the receiving unit according to the received radio frequency signal intensity, the radio frequency signal intensity is reduced along with the increase of the distance d, and the signal intensity P (d) and the distance d accord with the following formula:
d＝10[P(d1)－P(d)]/10n
wherein P (d)1) And n is the radio frequency signal intensity and radio frequency signal propagation scale factor obtained at 1m, the two values are related to the application environment, and can be calibrated in advance;
step five, according to the distance d between the transmitting unit and the receiving unit and the distance deviation between the left active radio frequency tag and the right active radio frequency tag, the transmitting communication controller controls the mechanical arm on the charging transmitting platform to move forwards or backwards along the X axis, and can also control the driving mechanism of the moving chassis to enable the charging transmitting platform to move forwards and backwards along the X axis direction in the moving channel, and the correctness of the moving direction is verified in the moving process;
when the mobile terminal moves in the correct direction, the strength of the radio frequency signal received and sent to the transmitting communication controller by the radio frequency reader is stronger and stronger, and the distance d calculated by the transmitting communication controller is smaller and smaller; when the movement direction is determined, the transmitting communication controller controls and drives the moving chassis to enable the charging transmitting platform to move towards the direction of the receiving unit;
when the radio frequency reader receives and sends radio frequency signal strength between the upper left active radio frequency tag, the upper right active radio frequency tag, the lower left active radio frequency tag and the lower right active radio frequency tag to the receiving unit, or the difference between the radio frequency signal strength between the upper left active radio frequency tag, the upper right active radio frequency tag, the lower left active radio frequency tag and the lower right active radio frequency tag cannot be reduced, the transmitting unit and the receiving unit are preliminarily aligned in the X-axis direction;
step six, the transmitting communication controller controls the mechanical arm on the charging transmitting platform to extend or retract along the Y-axis direction, and can also control a driving mechanism of the moving chassis to enable the charging transmitting platform to advance or retreat along the Y-axis direction in the moving channel so as to determine the advancing or retreating direction of the Y-axis direction;
when the strength of the radio-frequency signal received and sent to the transmitting communication controller by the radio-frequency reader is stronger and stronger, the correct movement direction is determined when the distance d calculated by the transmitting communication controller is smaller and smaller; when the movement direction is determined, the transmitting communication controller controls a driving mechanism of the mobile chassis to enable the charging transmitting platform to approach the direction of the receiving unit; when the distance d calculated by the transmitting communication controller is continuously reduced and meets the requirement of the mechanical arm in the extending working range of the Y-axis direction, the transmitting communication controller controls the moving chassis to stop moving;
step seven, the transmitting communication controller controls the mechanical arm on the charging transmitting platform to move upwards or downwards in the vertical direction of the space plane, and when the radio frequency signal strengths of the four radio frequency tags received by the radio frequency reader and transmitted to the transmitting communication controller are equal, or the difference between the radio frequency signal strengths of the radio frequency tags cannot be reduced, the transmitting unit and the receiving unit are preliminarily aligned in the height direction;
step eight, calculating the distance according to the intensity of the radio frequency signal to realize that a certain deviation exists in positioning, and further finishing the accurate alignment of the transmitting unit and the receiving unit after finishing the primary alignment through the radio frequency label;
after the preliminary alignment is finished through the radio frequency tag, the transmitting communication controller and the receiving communication controller respectively turn on the photoelectric switch transmitter and the photoelectric switch receiver, the photoelectric switch transmitter sends out optical signals, the transmitting communication controller controls the mechanical arm to move up and down, left and right in parallel in the vertical direction of the space plane by taking the preliminary aligned position as the center, the moving range takes the theoretical deviation of the positioning of the radio frequency tag as the reference, and the range needs to be calibrated in advance; when the receiving communication controller collects that the photoelectric switch receiver receives an optical signal sent by the photoelectric switch transmitter in the moving process of the mechanical arm, the receiving communication controller sends the information of the received optical signal to the transmitting communication controller, and the transmitting communication controller controls the mechanical arm to stop moving in parallel, slowly extend along the Y-axis direction and approach the receiving unit until the transmitting unit and the receiving unit are completely contacted and attached;
the transmitting communication controller sends information of the completion of contact fitting of the transmitting unit and the receiving unit to the receiving communication controller, the receiving communication controller receives the information of the completion of contact fitting and confirms that the photoelectric switch receiver can still receive an optical signal sent by the photoelectric switch transmitter, the receiving communication controller determines that the accurate alignment and positioning of the transmitting unit and the receiving unit are completed, and sends a confirmation signal of the completion of the accurate alignment to the transmitting communication controller;
as an example, the full contact bonding between the transmitting unit and the receiving unit means that when the intensity of the radio frequency signal received and sent by the radio frequency reader to each radio frequency tag of the transmitting communication controller is equal to zero, the corresponding signal is sent when the distance d is zeroNumber intensity P (d)0) And when the mechanical arm can not extend to move forwards any more, the signal strength P (d) represents that the transmitting unit and the receiving unit are completely contacted and attached0) Advanced calibration is also required.
Step nine, after the transmitting communication controller receives a confirmation signal that the accurate alignment of the transmitting unit and the receiving unit is completed, the transmitting communication controller controls the charging system to firstly send a low-power electric energy to the receiving end of the electric automobile, if the receiving communication controller detects that the received electric energy power meets a system design value, information is sent to the transmitting communication controller, the transmitting communication controller controls the transmitting communication controller to gradually increase the output power to start charging, and if the system design value is not met, the steps are repeated to perform positioning again;
as an example, when the electric vehicle is charged, parameters such as voltage and current required by charging the power battery are sent to the transmitting communication controller through the receiving communication controller, and the transmitting communication controller controls the PFC unit, the inverter unit, the transmitting resonance unit and the compensation network to complete corresponding energy conversion and transmission;
as an example, the wireless charging of the electric vehicle adopts an electric field coupling mode, a power supply on the charging and transmitting platform is connected with an external alternating current input end through an extensible flexible power supply cable, the power supply supplies power to the transmitting communication controller, the photoelectric switch transmitter, the mobile chassis and the mechanical arm, and the power supply is connected with a PFC (power factor correction) unit;
step ten, after the electric quantity of a power battery of the vehicle is fully charged, the power supply is turned off and the alternating current input transmitted to the PFC unit is stopped to charge, the mechanical arm retracts the transmitting unit, and the charging transmitting platform leaves the charging position;
as an example, when a plurality of electric vehicles need to be charged, the charging launching platform moves to the next vehicle according to the above steps after charging is completed, and continues to complete the flow of position positioning and charging;
as an example, the charging service may be performed through a remote reservation, such as starting charging when the electricity price is in a low valley at night, and the sequential allocation of the vehicle charging is performed by the platform communication control unit and the charging launching platform; and when the whole charging process is finished, the charging launching platform automatically moves and retreats to the standby position.
Has the advantages that:
the utility model discloses need not to realize the alignment between the coupling mechanism of transmitting terminal and receiving terminal through manual driving or automatic parking, only need to stop the electric automobile that waits to charge to appointed parking stall position, just can accomplish above-mentioned action through the multi freedom arm that charges the transmission platform and carry to solve electric automobile wireless charging and need the coil to aim at, operate inconvenient problem, realized electric automobile's automatic wireless charging; through the utility model discloses charging structure can also realize charging to a plurality of parking stalls according to the order, has reduced the initial investment cost of battery charging outfit;
the utility model discloses a wireless charging is realized to capacitive coupling's mode, only with frivolous low-priced copper foil, aluminium foil, conducting polymer etc. just can regard as the polar plate of transmitting and receiving, the coupling mechanism of system is simple frivolous and the shape is unrestricted, compares the cost very low with the required expensive litz wire of magnetic coupling mode and magnetic conductive material, and weight is also lighter than the coil of magnetic coupling mode, realizes that the wireless charging of capacitive coupling is less to electric automobile's structural change, need not change even. When the capacitive coupling mode is adopted for wireless charging, even if a metal object exists in a coupling electric field, eddy current loss can not be caused in the metal object to cause heating and burning. In the charging process, electric energy is transmitted between the transmitting pole plate and the receiving pole plate, the electromagnetic interference to the surrounding environment is very small, electromagnetic radiation cannot be released to an external space, the safe operation of a system can be ensured, and high transmission efficiency can be obtained.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the capacitive coupling type automatic wireless charging system for electric vehicles
FIG. 2 is a schematic diagram of the structure of the transmitting unit and the receiving unit of the capacitive coupling type automatic wireless charging system for electric vehicles
FIG. 3 is a schematic view of the working state of the capacitive coupling electric vehicle automatic wireless charging system
FIG. 4 is a schematic diagram of the coordinate setting reference of the car wireless charging of the automatic wireless charging system of the capacitive coupling electric car
Detailed Description
Referring now to fig. 1 through 4, an automatic wireless charging system for a capacitive coupling electric vehicle comprises: a charging and transmitting platform 101 and a vehicle-mounted receiving device 102;
further, the charging and transmitting platform 101 includes: a transmitting unit 103, a transmitting power supply cabinet 104, a mechanical arm 105 and a mobile chassis 106; the tail end of the mechanical arm 105 is arranged above the transmitting power supply cabinet 104; the transmission power cabinet 104 is mounted above the mobile chassis 106; the transmitting unit 103 is installed at the front end of the mechanical arm 105, and a radio frequency reader 107, a photoelectric switch transmitter 108 and two transmitting polar plates 109 are installed at the center of the transmitting unit 103;
by way of illustration, the transmission power cabinet 104 includes: the device comprises an outer shell, and a power supply 110, a PFC unit 111, an inversion unit 112, a transmission resonance unit 113, a compensation network 114 and a transmission communication controller 115 which are arranged inside the outer shell;
as an illustration, the transmitting power cabinet 104 may also be mounted on one side of the robot 105 in a hanging manner;
as an example, the robot arm 105 is a multi-degree-of-freedom cooperative robot, and the cooperative robot has the advantages that the robot can interact with human in a close range in a common space, and the action of the robot does not consider the safety protection when human moves in a charging area;
as an illustration, the PFC unit 111 includes: the power frequency alternating current input from the outside is sent to a PFC unit 111 through a power supply 110, and is converted into direct current through rectification and filtering; the direct current is transmitted to the transmitting inversion unit 112, and then is inverted into a high-frequency alternating current, and then is boosted by the transmitting resonance unit 113, and the high-frequency high-voltage alternating current is applied to the transmitting pole plate 109 through the compensation network 114;
as an illustration, the compensation network 114 is used to tune the LC resonance formed between the coupling capacitance and the inductance of the resonant unit to improve the transmission power and efficiency;
as an example of an application, the compensation network 114 may employ one of voltage series resonance compensation, current parallel resonance compensation, or composite resonance compensation;
further, the vehicle-mounted receiving apparatus 102 is mounted on an electric vehicle, and includes: a receiving resonance unit 116, a rectification unit 117, a power battery 118, a direct current converter 119, a storage battery 120, a receiving communication controller 121, and a receiving unit 122;
further, the receiving unit 122 is provided with a photoelectric switch receiver 123, four active radio frequency tags 124 and two receiving plates 125, and the four active radio frequency tags 124 are respectively installed at four corners of the receiving unit 122, namely, the upper left corner, the lower left corner, the upper right corner and the lower right corner; the receiving communication controller 121 establishes communication connection with a vehicle control unit of the electric vehicle through a CAN bus, and receives an information instruction of the vehicle;
as an illustration, the receiving communication controller 121 and four active rf tags 124 are powered by the battery 120;
as an example, a coupling capacitor is formed between the transmitting electrode plate 109 and the receiving electrode plate 125 by aligning the transmitting unit 103 and the receiving unit 122, the two coupling capacitors formed by the two transmitting electrode plates 109 and the two receiving electrode plates 125 are communicated with a live line and a zero line in a single-phase alternating current loop, and under the action of high-frequency high-voltage alternating current, the alternating current is transmitted to the receiving electrode plate 125 through the transmitting electrode plate 109, so that wireless transmission of electric energy is realized;
the high-frequency alternating current transmitted to the receiving electrode plate 125 is sent to the rectifying unit 117 after passing through the receiving resonance unit 116, the alternating current is converted into direct current after being rectified, and the direct current is transmitted to a power battery 118 on the automobile to charge the electric automobile; the direct current of the power battery 118 is converted into low-voltage direct current through the direct current converter 119 to charge the storage battery; when the charging and transmitting platform is positioned, the storage battery 120 supplies power to the receiving and communicating controller 121, the radio frequency tag 124 and the photoelectric switch receiver 123, and the storage battery 120 continues to supply power to the receiving and communicating controller 121 during charging.
Furthermore, a processing unit with data processing capability and a wireless communication unit are built in each of the receiving communication controller 121 and the transmitting communication controller 115, and the transmitting communication controller 115 and the receiving communication controller 121 can perform wireless communication between data through their built-in wireless communication units;
as an illustration, the wireless communication employs: one of Wi-Fi, Zigbee, Bluetooth, millimeter wave or ultra wide band communication modes;
as an illustration, the receiving unit 122 is installed on the side, head, tail, roof or underbody of the body of the electric vehicle, such as the bumper and the license plate of the vehicle;
as an illustration, the housings of the transmitting unit 103 and the receiving unit 122 are made of an insulating material;
as an example, the transmitting plate 109 and the receiving plate 125 are made of one or a combination of copper foil, aluminum foil, or carbon material;
as another example, the transmitting plate 109 and the receiving plate 125 may also be thin film electrodes made of conductive polymer, and in order to increase the capacitance and maintain good insulation between the transmitting plate and the receiving plate, the transmitting plate 109 and the receiving plate 125 are encapsulated inside an insulating material;
as an example of an application, the insulating material is: one or a combination of glass, ceramic laminate, barium titanate and titanium dioxide;
the utility model discloses a wireless charging is realized to capacitive coupling's mode, only with frivolous low-priced copper foil, aluminium foil, conducting polymer etc. just can regard as the polar plate of transmitting and receiving, the coupling mechanism of system is simple frivolous and the shape is unrestricted, compares the cost very low with the required expensive litz wire of magnetic coupling mode and magnetic conductive material, and weight is also lighter than the coil of magnetic coupling mode, realizes that the wireless charging of capacitive coupling is less to electric automobile's structural change, need not change even. When the capacitive coupling mode is adopted for wireless charging, even if a metal object exists in a coupling electric field, eddy current loss can not be caused in the metal object to cause heating and burning. In the charging process, electric energy is transmitted between the transmitting pole plate and the receiving pole plate, the electromagnetic interference to the surrounding environment is very small, electromagnetic radiation cannot be released to an external space, the safe operation of a system can be ensured, and high transmission efficiency can be obtained.
The disclosure above is only one specific embodiment of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.

Claims (8)

1. Automatic wireless charging system of capacitive coupling formula electric automobile, its characterized in that includes: the charging transmitting platform and the vehicle-mounted receiving equipment;
the charging emission platform comprises: the device comprises a transmitting unit, a transmitting power supply cabinet, a mechanical arm and a movable chassis; the tail end of the mechanical arm is arranged above the transmitting power supply cabinet; the transmitting power supply cabinet is arranged above the movable chassis; the transmitting unit is arranged at the front end of the mechanical arm, and a radio frequency reader, a photoelectric switch transmitter and two transmitting polar plates are arranged at the center of the transmitting unit; the transmission power supply cabinet includes: the device comprises an outer shell, a power supply, a PFC unit, an inversion unit, a transmission resonance unit, a compensation network and a transmission communication controller, wherein the power supply, the PFC unit, the inversion unit, the transmission resonance unit, the compensation network and the transmission communication controller are arranged in the outer shell;
the vehicle-mounted receiving device is mounted on an electric vehicle and comprises: the device comprises a receiving resonance unit, a rectifying unit, a power battery, a direct current converter, a storage battery, a receiving communication controller and a receiving unit; the receiving unit is provided with a photoelectric switch receiver, four active radio frequency tags and two receiving polar plates, wherein the four active radio frequency tags are respectively arranged at the upper left corner, the lower left corner, the upper right corner and the lower right corner of the receiving unit; the receiving communication controller is in communication connection with a vehicle control unit of the electric vehicle through a CAN bus, and receives information instructions of the vehicle;
the transmitting polar plate and the receiving polar plate form a coupling capacitor through the alignment of the transmitting unit and the receiving unit, the two coupling capacitors formed by the two transmitting polar plates and the two receiving polar plates are communicated with a live wire and a zero wire which are equivalent to those in a single-phase alternating current loop, and under the action of high-frequency high-voltage alternating current, the alternating current is transmitted to the receiving polar plate through the transmitting polar plate, so that the wireless transmission of electric energy is realized;
the receiving communication controller and the transmitting communication controller are internally provided with a processing unit with data processing capability and a wireless communication unit, and the transmitting communication controller and the receiving communication controller can carry out wireless communication between data through the built-in wireless communication units.
2. The system of claim 1, wherein the robotic arm is a multi-degree of freedom cooperative robot.
3. The automatic wireless charging system of claim 1, wherein the PFC unit comprises: the power frequency alternating current input from the outside is sent to the PFC unit through a power supply, and is converted into direct current through rectification and filtering; the direct current is transmitted to the transmitting inversion unit and then inverted into high-frequency alternating current, then the high-frequency alternating current is boosted through the transmitting resonance unit, and the high-frequency high-voltage alternating current is applied to the transmitting polar plate through the compensation network.
4. The system of claim 1, wherein the compensation network is configured to tune an LC resonance formed between the coupling capacitor and an inductor of the resonant unit to improve transmission power and efficiency; the compensation network may employ one of voltage series resonance compensation, current parallel resonance compensation, or composite resonance compensation.
5. The capacitive coupling electric vehicle automatic wireless charging system of claim 1, wherein the wireless communication employs: Wi-Fi, Zigbee, Bluetooth, millimeter wave or ultra wide band communication mode.
6. The capacitive coupling automatic wireless charging system for the electric automobile according to claim 1, wherein the receiving unit is installed on the side surface, the head, the tail, the roof or the underbody of the automobile body of the electric automobile.
7. The automatic wireless charging system of a capacitive coupling electric vehicle according to any one of claims 1 to 6, wherein the housings of the transmitting unit and the receiving unit are made of an insulating material; the transmitting polar plate and the receiving polar plate are processed and manufactured by one or a combination of copper foil, aluminum foil or carbon materials.
8. The system of claim 7, wherein the transmitting plate and the receiving plate are thin film electrodes made of conductive polymer, and are encapsulated inside an insulating material to increase capacitance and maintain good insulation between the transmitting plate and the receiving plate.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110293861A (en) * 2019-08-13 2019-10-01 北京有感科技有限责任公司 Capacitance coupling type electric car automated wireless charging system and charging method
CN111559268A (en) * 2020-07-15 2020-08-21 北京有感科技有限责任公司 Wireless charging system
CN113078743A (en) * 2021-04-06 2021-07-06 山东大学 Movable wireless charging device and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110293861A (en) * 2019-08-13 2019-10-01 北京有感科技有限责任公司 Capacitance coupling type electric car automated wireless charging system and charging method
CN111559268A (en) * 2020-07-15 2020-08-21 北京有感科技有限责任公司 Wireless charging system
CN113078743A (en) * 2021-04-06 2021-07-06 山东大学 Movable wireless charging device and method

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