CN110901421A - Intelligent bidirectional dynamic wireless charging system and method - Google Patents
Intelligent bidirectional dynamic wireless charging system and method Download PDFInfo
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- CN110901421A CN110901421A CN201911283790.8A CN201911283790A CN110901421A CN 110901421 A CN110901421 A CN 110901421A CN 201911283790 A CN201911283790 A CN 201911283790A CN 110901421 A CN110901421 A CN 110901421A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- 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
Abstract
The invention discloses an intelligent bidirectional dynamic wireless charging system which comprises a common lane, a wireless charging lane, a vehicle-mounted battery, an energy receiving device, an energy transmitting device, a storage battery device and a power grid input device, wherein the vehicle-mounted battery is arranged on an electric automobile, the power grid input device is arranged on the wireless charging lane, the energy receiving device is arranged on the electric automobile and is connected with the vehicle-mounted battery, the energy transmitting device is arranged on the wireless charging lane and is connected with the power grid input device, and the storage battery device is arranged on the wireless charging lane and is connected between the power grid input device and the energy transmitting device. The system of the invention not only ensures the stable operation of the power grid, but also saves energy. In addition, the invention also discloses an intelligent bidirectional dynamic wireless charging method.
Description
Technical Field
The invention relates to the field of wireless charging of electric automobiles, in particular to an intelligent bidirectional dynamic wireless charging system and method.
Background
The traditional automobile is a transportation tool using petroleum as fuel, brings more convenience to work and life of people, and simultaneously enables the national traffic to depend on petrochemical resources more and more, thereby continuously intensifying the crisis of petroleum energy and causing the depletion of petrochemical energy increasingly. Meanwhile, the combustion of petroleum also brings atmospheric pollution, which causes a series of environmental problems. Therefore, under the double pressure of energy saving and environmental protection, it is increasingly important to develop and popularize new energy vehicles such as electric vehicles.
However, the popularization and application of the electric vehicle are mainly limited by short driving range, long charging time and fixed charging place. Therefore, how to further perfect the electric vehicle charging facility so as to realize the quick and effective charging of the electric vehicle is a key problem of the quick development of the electric vehicle.
Along with the development of electric vehicles, the wireless charging technology of electric vehicles adopting the wireless power transmission technology becomes a novel charging mode. According to the running state of the electric automobile in the wireless charging process, the wireless charging mode can be divided into static wireless charging and dynamic wireless charging. In the static wireless charging method, since there is a strict limitation on a charging area, a user must charge a designated area, and the electric vehicle cannot travel even during the charging process. In addition, due to the limitation of the capacity and the volume of the vehicle-mounted lithium battery of the electric automobile, the endurance mileage of the electric automobile is strictly limited, so that the electric automobile cannot run for a long distance. In order to shorten the charging time of the electric vehicle, the static wireless charging facility is required to provide a high charging power, which is a technical difficulty of the static wireless charging technology. Regarding the dynamic wireless charging mode, the dynamic wireless charging mode can continuously charge the electric automobile in the running process, so that the electric automobile can meet the requirement of high driving range only by being provided with a small number of battery packs, and the charging facility does not need to provide extremely high charging power, thereby reducing the requirement on the charging facility. Therefore, compare in static wireless charging, the wireless charging process of electric automobile developments is more convenient for safety.
On the one hand, however, when the wireless charging system of the electric vehicle is connected to the dynamic wireless charging system in a large scale, the power grid may be overloaded, and thus the power grid may not operate stably. On the other hand, when the electric vehicle has sufficient battery capacity, the dynamic wireless charging system is still in a charging process, so that energy waste is caused.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides an intelligent bidirectional dynamic wireless charging system and method, which not only ensure that a power grid can still stably operate when the power grid is overloaded, but also can recover electric energy by using a storage battery when the electric quantity of an electric automobile is surplus, thereby saving energy.
In order to achieve the above object, the present invention provides an intelligent bidirectional dynamic wireless charging system, which comprises a common lane, a wireless charging lane, a vehicle-mounted battery, an energy receiving device, an energy transmitting device, a storage battery device and a power grid input device, wherein:
the vehicle-mounted battery is arranged on the electric automobile and used for providing electric energy for the electric automobile;
the power grid input device is arranged on the wireless charging lane and used for providing electric energy for the vehicle-mounted battery and the storage battery device;
the energy receiving device is arranged on the electric automobile, connected with the vehicle-mounted battery and used for detecting the electric quantity of the vehicle-mounted battery in real time, comparing the real-time detected electric quantity of the vehicle-mounted battery with a set electric quantity value, if the real-time detected electric quantity of the vehicle-mounted battery exceeds the set electric quantity value, detecting a backfeed request sent by the energy transmitting device and a selection signal sent by an automobile owner whether to reject the backfeed request or not, and sending first feedback information, a selected working mode and an entered lane to the energy transmitting device according to the detected backfeed request and the selection signal of the automobile owner; if the set electric quantity value is not exceeded, sending a forward charging request to the energy transmitting device and the storage battery device, and selecting a working mode and an entering lane according to received second feedback information sent by the energy transmitting device;
the energy transmitting device is arranged on the wireless charging lane, connected with the power grid input device and used for detecting the load of the power grid input device in real time, comparing the load of the power grid input device detected in real time with a set power grid load rated value and a power grid load critical value, and if the load of the power grid input device exceeds the set power grid load critical value, sending the feedback request to the energy receiving device and the storage battery device and selecting a working mode according to received first feedback information sent by the energy receiving device; if the set grid load rating is not exceeded, the energy transmitting device sends an energy storage command to the storage battery device; if the power grid load rating exceeds the set power grid load critical value but does not exceed the set power grid load critical value, detecting the forward charging request sent by the energy receiving device, selecting a working mode according to the received forward charging request, sending second feedback information, and sending an auxiliary energy command to the storage battery device;
and the storage battery device is arranged on the wireless charging lane, is connected between the power grid input device and the energy transmitting device, and is used for respectively selecting an energy input state, an energy output state or an energy selection input and output state according to the forward charging request received from the energy receiving device, the backward feeding request received from the energy transmitting device, the backward feeding request received from the energy receiving device, the energy storage command and the auxiliary energy command received from the energy transmitting device.
Further, the working modes of the energy receiving device comprise a rectification mode and an inversion mode, and the working modes of the energy transmitting device comprise a rectification mode and an inversion mode.
Preferably, after the accumulator device receives the feedback request sent by the energy transmitting device and the feedback receiving request sent by the energy receiving device, the accumulator device selects an energy preferred in-out state.
Preferably, the energy preferential entry and exit state is to control a high-electric-quantity storage battery in the storage battery device to be switched to an energy output state, and a low-electric-quantity storage battery to be switched to an energy input state.
Preferably, the grid input device includes a grid and an AC/DC converter connected in sequence, the AC/DC converter is connected to a DC bus, the energy transmitting device includes an energy transmitting coil, a first resonance compensation unit, a first bidirectional AC/DC unit, and a first controller, the energy transmitting coil, the first resonance compensation unit, and the first bidirectional AC/DC unit are connected in sequence, the first controller is connected to the first bidirectional AC/DC unit, the first bidirectional AC/DC unit is connected to the DC bus, the energy receiving device includes an energy receiving coil, a second resonance compensation unit, a second bidirectional AC/DC unit, and a second controller, the energy receiving coil, the second resonance compensation unit, the second bidirectional AC/DC unit, and the on-vehicle battery are connected in sequence, the second controller is connected with the second bidirectional AC/DC unit, the storage battery device comprises a storage battery pack and a storage battery pack controller which are connected in sequence, and the storage battery pack is located between the AC/DC converter and the first bidirectional AC/DC unit and is connected with the direct current bus.
Preferably, the information exchange among the first controller, the second controller and the storage battery pack controller is realized by wireless communication.
Preferably, the energy receiving coil is used for receiving electric energy; the second resonance compensation unit is used for enabling the intelligent bidirectional dynamic wireless charging system to work at a resonance frequency and compensating leakage inductance between the energy receiving coil and the energy transmitting coil; the second bidirectional AC/DC unit is used for switching into a rectification mode or an inversion mode; the second controller is used for detecting the electric quantity of the vehicle-mounted battery in real time, comparing the real-time detected electric quantity of the vehicle-mounted battery with a set electric quantity value, if the real-time detected electric quantity of the vehicle-mounted battery exceeds the set electric quantity value, detecting a backfeed request sent by the first controller and a selection signal sent by a vehicle owner whether to reject the backfeed request or not, sending first feedback information to the energy transmitting device according to the detected backfeed request and the selection signal of the vehicle owner, controlling the second bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode, and selecting to enter the common lane or the wireless charging lane; and if the set electric quantity value is not exceeded, sending a forward charging request to the first controller and the storage battery pack controller, controlling the second bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode according to the received second feedback information sent by the first controller, and sending a signal for selecting to enter the common lane or the wireless charging lane to a vehicle owner.
Preferably, the energy transmitting coil is used for outputting electric energy; the first resonance compensation unit is used for enabling the intelligent bidirectional dynamic wireless charging system to work at a resonance frequency and compensating leakage inductance between the energy transmitting coil and the energy receiving coil; the first bidirectional AC/DC unit is used for switching into a rectification mode or an inversion mode; the first controller is used for detecting the load of the power grid input device in real time, comparing the load of the power grid input device detected in real time with a set power grid load rated value and a power grid load critical value, if the load of the power grid input device exceeds the set power grid load critical value, sending the feedback request to the second controller and the storage battery pack controller, and controlling the first bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode according to received first feedback information sent by the second controller; if the set power grid load rating is not exceeded, detecting the forward charging request sent by the second controller, controlling the first bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode and sending second feedback information according to the received forward charging request, and sending an energy storage command to the storage battery controller by the first controller; if the set grid load rating is exceeded but the set grid load threshold is not exceeded, the first controller sends an auxiliary power command to the battery pack controller.
Preferably, the storage battery pack is used for providing auxiliary electric energy; the storage battery controller is used for detecting the electric quantity of the storage battery pack at regular time, controlling the storage battery pack to be switched to an energy output state according to the forward charging request received from the second controller, and respectively controlling the storage battery pack to carry out energy preferential access, energy input state selection or energy output state according to the backward feeding request received from the first controller, the backward feeding request received from the second controller, and the energy storage command and the auxiliary energy command received from the first controller.
In addition, the invention also provides an intelligent bidirectional dynamic wireless charging method, which specifically comprises the following steps:
the energy receiving device compares the electric quantity of the vehicle-mounted battery on the electric automobile detected in real time with a set electric quantity value, and the following operations are carried out according to the comparison result:
(a) if the set electric quantity value is exceeded, detecting whether a backfeed request from an energy transmitting device and a selection signal of whether a vehicle owner refuses the backfeed request exist, if the backfeed request is not received or the vehicle owner refuses the backfeed request is received, the electric vehicle runs on a common lane, the energy receiving device is switched to a rectification mode, the energy transmitting device is switched to an inversion mode, a storage battery device is switched to an energy input state, a power grid charges the storage battery device, otherwise, the energy receiving device sends feedback information of accepting the backfeed request to the energy transmitting device and the storage battery device, the electric vehicle enters a wireless charging lane, the energy receiving device is switched to the inversion mode, and the energy transmitting device is switched to the rectification mode, the storage battery device is switched into an energy preferred in-out state, so that a vehicle-mounted battery of the electric automobile and a storage battery pack of the storage battery device with high electric quantity feed back electric energy to the power grid and the storage battery pack of the storage battery device with low electric quantity;
(b) if the detected load of the power grid input device does not exceed a set power grid load rated value, the electric automobile enters a wireless charging lane, the energy receiving device is switched to a rectification mode, the energy transmitting device is switched to an inversion mode, the energy transmitting device transmits an energy storage command to the storage battery pack controller, and the storage battery device is switched to an energy storage state, so that the power grid charges a vehicle-mounted battery of the electric automobile and a storage battery pack of the storage battery device; if feedback information which is sent by the energy transmitting device and receives the forward charging request is received, and the detected load of the power grid input device exceeds a set power grid load rated value but does not exceed a set power grid load critical value, the electric automobile enters a wireless charging lane, the energy receiving device is switched to a rectification mode, the energy transmitting device is switched to an inversion mode, the energy transmitting device sends an auxiliary energy command to the storage battery pack controller, and the storage battery device is switched to an auxiliary energy state; otherwise, the electric automobile continues to run on the common lane or drives to the adjacent charging pile for charging.
The technical scheme provided by the invention has the beneficial effects that:
the energy transmitting device and the energy receiving device can switch the working modes according to the electric quantity of the vehicle-mounted battery detected in real time and the load of the power grid, so that the bidirectional dynamic charging among the electric automobile, the storage battery pack and the power grid is realized, on one hand, when the wireless charging system is connected to the electric automobile in a large scale and the power grid load is overlarge, the bidirectional wireless charging system can feed electricity to the power grid in a reverse direction, so that the stable operation of the power grid is ensured, on the other hand, when the electric quantity of the vehicle-mounted battery of the electric automobile is surplus, the storage battery device can recover the electric energy, the energy is saved, on the other hand, the electric automobile can be continuously charged in the running process of a dynamic wireless charging road, and the electric automobile can meet the requirement of high endurance only by being provided with a small number of vehicle. In addition, in the actual operation process, the switching between the forward charging state and the backward feeding state of the bidirectional dynamic wireless charging system is automatically completed by detecting the working states of the power grid, the vehicle-mounted battery pack and the storage battery pack, so that the bidirectional dynamic wireless charging system is an intelligent bidirectional dynamic wireless charging system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an intelligent bidirectional dynamic wireless charging system according to an embodiment of the present invention;
fig. 2 is a schematic layout of a grid input unit and the energy transmission device;
fig. 3 is a flowchart illustrating a first controller of an intelligent bidirectional dynamic wireless charging system according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a second controller of the intelligent bidirectional dynamic wireless charging system according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating an operation of a battery pack controller of an intelligent bidirectional dynamic wireless charging system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be further described in detail below with reference to the drawings in the embodiments of the present invention.
The embodiment of the invention provides an intelligent bidirectional dynamic wireless charging system, and referring to fig. 1-2, the system is designed with two lanes, wherein one lane is a common lane 10, and the other lane is a wireless charging lane 20. In addition, the system comprises a grid input device 30, an energy emitting device 40, an energy receiving device 50, a battery device 60 and an on-board battery 70.
Specifically, the grid input device 30 is disposed on the wireless charging lane 20 and is used for supplying electric energy to the storage battery device 60 and the vehicle-mounted battery 70, and includes a grid 301 and an AC/DC converter 302, wherein the grid 301 and the DC bus 80 are connected through the AC/DC converter 302, and the AC/DC converter 302 can convert AC power into DC power. The energy transmitting device 40 is arranged on the wireless charging lane 20 and comprises a first bidirectional AC/DC unit 401, a first resonance compensation unit 402, a first controller 403 and energy transmitting coils 404, wherein one end of the first bidirectional AC/DC unit 401 is connected with the direct current bus 80, the other end of the first bidirectional AC/DC unit 401 is connected with the first resonance compensation unit 402, the first controller 403 is connected with the first bidirectional AC/DC unit 401, the first resonance compensation unit 402 is connected with the energy transmitting coils 404, the first bidirectional AC/DC unit 401, the first resonance compensation unit 402 and the first controller 403 can be installed in a transmitting end control cabinet, and the plurality of energy transmitting coils 404 are laid on the wireless charging lane 20. The energy receiving device 50 is arranged on an electric automobile and comprises an energy receiving coil 501, a second resonance compensation unit 502, a second bidirectional AC/DC unit 503 and a second controller 504, wherein the energy receiving coil 501 corresponds to the energy transmitting coil 404 and is installed on a chassis of the electric automobile, one end of the second resonance compensation unit 502 is connected with the energy receiving coil 501, the other end of the second resonance compensation unit 502 is connected with the second bidirectional AC/DC unit 503, the second controller 504 and the vehicle-mounted battery 70 are connected with the second bidirectional AC/DC unit 503, and the second resonance compensation unit 502, the second bidirectional AC/DC unit 503 and the second controller 504 can be installed on a receiving end control cabinet. The vehicle-mounted battery 70 is mounted on an electric vehicle (not shown) and is used to supply electric power to the electric vehicle. The battery device 60 is disposed on the wireless charging lane 20, and includes a battery pack 601 and a battery pack controller 602, the battery pack 601 is disposed between the AC/DC converter 32 and the first bidirectional AC/DC unit 401 and connected to the DC bus 80, and the battery pack controller 602 is connected to the battery pack 601. The first controller 403, the second controller 504, and the battery pack controller 602 each have a wireless communication module, and wireless communication and information exchange are possible among the three.
Also, the first bidirectional AC/DC unit 401 is used to switch to a rectifying mode or an inverting mode. The first resonance compensation unit 402 is used to operate the intelligent bidirectional dynamic wireless charging system at a resonance frequency and compensate for leakage inductance between the energy transmitting coil 404 and the energy receiving coil 501. The first controller 403 is configured to detect a load of the power grid 301 in real time, compare the detected load of the power grid 301 with a set power grid load rating and a power grid load critical value, send a feedback request to the second controller 504 and the storage battery pack controller 602 if the detected load exceeds the set power grid critical load value, and control the first bidirectional AC/DC unit 401 to switch to the rectification mode or the inversion mode according to the first feedback information sent by the second controller 504; if the set grid load rating is not exceeded, detecting a forward charging request sent by the second controller 504, controlling the first bidirectional AC/DC unit 401 to switch into a rectification mode or an inversion mode and sending second feedback information according to the received forward charging request, and sending an energy storage command to the storage battery controller 602 by the first controller 403; if the set grid load rating is exceeded but the grid load threshold is not exceeded, the first controller 403 sends an auxiliary power command to the battery controller 602. The energy transmitting coil 404 is used to output electrical energy.
The energy receiving coil 501 corresponds to the energy transmitting coil 404 and is used for receiving electric energy. The second resonance compensation unit 502 is used to operate the intelligent bidirectional dynamic wireless charging system at a resonance frequency and compensate for leakage inductance between the energy receiving coil 501 and the energy transmitting coil 404. The second bi-directional AC/DC unit 503 is used to switch to either a rectifying mode or an inverting mode. The second controller 504 is configured to detect an electric quantity of the vehicle-mounted battery 70 in real time, compare the detected electric quantity of the vehicle-mounted battery 70 with a set electric quantity value, detect, if the detected electric quantity value exceeds the set electric quantity value, a backfeed request sent by the first controller 403 and a selection signal sent by a vehicle owner whether to reject the backfeed request, send first feedback information to the first controller 403, control the second bidirectional AC/DC unit 503 to switch to a rectification mode or an inversion mode, and select to enter the ordinary lane 10 or the wireless charging lane 20 according to the detected backfeed request and the selection signal of the vehicle owner; if the set electric quantity value is not exceeded, a forward charging request is sent to the first controller 403 and the storage battery pack controller 602, and the second bidirectional AC/DC unit 503 is controlled to be switched to a rectification mode or an inversion mode according to the received second feedback information sent by the first controller 403 and a signal for selecting to enter the ordinary lane 10 or the wireless charging lane 20 is sent to the vehicle owner.
The battery pack 601 is used to supply auxiliary power. The battery controller 602 is configured to detect an amount of electricity in the battery pack 601 at regular time, control the battery pack 601 to switch to an energy output state according to a forward charging request received from the second controller 504, and control the battery pack 601 to preferentially enter and exit, control the battery pack 601 to switch to an energy input state, and control the battery pack 601 to switch to an energy output state according to a backward feeding request received from the first controller 403 and an energy storage command received from the second controller 504 and receiving the backward feeding request, the energy storage command received from the first controller 403, and an auxiliary energy command received from the first controller 403, respectively. For example, when the battery controller 602 receives the backfeed request from the first controller 403 and does not receive the backfeed rejection request from the second controller 504, the battery controller 602 controls the battery with higher capacity to switch to the energy output state and controls the battery with lower capacity to switch to the energy input state, that is, the electric vehicle with higher capacity, the battery with higher capacity and the power grid together charge the electric vehicle with lower capacity and the battery with lower capacity.
In detail, the first resonance compensation unit 402 includes a first inductor, a first capacitor, and a third capacitor, one end of the first inductor is connected to the output terminal of the first bidirectional AC/DC unit and the other end is connected to the first capacitor, the other end of the first capacitor is connected to the energy transmitting coil 404, one end of the third capacitor is connected between the first capacitor and the first inductor and the other end is connected to the output terminal of the first bidirectional AC/DC unit and the energy transmitting coil 404. The second resonance compensation unit 502 includes a second inductor, a second capacitor, and a fourth capacitor, where one end of the second inductor is connected to the input terminal of the second bidirectional AC/DC unit and the other end is connected to the second capacitor, the other end of the second capacitor is connected to the energy receiving coil 501, one end of the fourth capacitor is connected between the second capacitor and the second inductor, and the other end is connected to the input terminal of the second bidirectional AC/DC unit and the energy receiving coil 501.
Referring to fig. 3 to 5, an embodiment of the present invention further provides an intelligent bidirectional dynamic wireless charging method, where the method specifically includes:
the second controller 504 detects the power condition of the vehicle-mounted battery 70 in real time, the first controller 403 detects the load condition of the power grid 301 in real time, and the battery controller 602 detects the power condition of the battery pack 601 in real time.
The second controller 504 detects the electric quantity of the vehicle-mounted battery 70 in real time and compares the detected electric quantity of the vehicle-mounted battery 70 with a set electric quantity value, and according to the comparison result, the following operations are performed:
(a) if the set electric quantity value (namely the electric quantity of the vehicle-mounted battery 70 is high) is exceeded, the electric vehicle runs on the ordinary lane 10, whether a backfeed request from the first controller 403 exists or not is detected (namely the backfeed request sent by the power grid 301 through the first controller 403 is received), when the second controller 504 does not receive the backfeed request or the second controller 504 receives the backfeed request and the vehicle owner refuses the backfeed request, the electric vehicle runs on the ordinary lane 10, the second bidirectional AC/DC unit 503 is switched to a rectification mode, the first bidirectional AC/DC unit 401 is switched to an inversion mode, the storage battery controller 602 controls the storage battery pack 601 to be switched to an energy input state according to an energy storage command sent by the first controller 403, and the power grid charges the storage battery pack 601; when the second controller 504 receives a reverse feeding request from the first controller 403 (i.e. the load of the power grid 301 exceeds the set load threshold) and the vehicle owner does not reject the reverse feeding request, the second controller 504 sends a reverse feeding acceptance request to both the first controller 403 and the battery controller 602, at this time, the first controller 403 controls the first bidirectional AC/DC unit 401 to operate in the rectification mode, the second controller 504 controls the second bidirectional AC/DC unit 503 to operate in the inversion mode, the battery controller 602 controls the high-capacity battery pack 601 to switch to the energy output state according to the reverse feeding request sent by the first controller 403 and the reverse feeding rejection request of the second controller 504, the low-capacity battery pack 601 switches to the energy input state, the bidirectional dynamic wireless charging system switches to the reverse feeding state, and the electric vehicle enters the dynamic wireless charging lane 20, the electric energy is fed back to the low-electric-quantity storage battery pack 601 and the power grid 301 by the vehicle-mounted battery 70 and the high-electric-quantity storage battery pack 601 of the electric automobile; when the load of the power grid 301 is restored to the bearable range, the electric vehicle drives back to the ordinary lane 10, and the backward feeding to the power grid 301 is finished.
(b) If the preset electric quantity value is not exceeded (namely, the electric quantity of the vehicle-mounted battery 70 is low), the second controller 504 sends a forward charging request to the first controller 403 and the battery controller 602, if the second controller 504 receives feedback information sent by the first controller 403 for receiving the forward charging request and the load of the power grid 301 detected by the first controller 403 does not exceed the preset power grid load rating, the first controller 403 controls the first bidirectional AC/DC unit 401 to work in the inversion mode, the second controller 504 controls the second bidirectional AC/DC unit 503 to work in the rectification mode, the battery controller 602 controls the battery pack 601 to switch to the energy input state according to an energy storage command sent by the first controller, so that the bidirectional dynamic wireless charging system is switched to the forward charging state, the electric vehicle drives into the dynamic wireless charging lane 20, and the power grid 301 charges the vehicle-mounted battery 70 and the battery pack 601 of the electric vehicle; if the second controller 504 receives feedback information sent by the first controller 403 for receiving the forward charging request and the load of the power grid 301 detected by the first controller 403 exceeds the set power grid load rating value but does not exceed the set power grid load critical value, the first controller 403 controls the first bidirectional AC/DC unit 401 to operate in the inverter mode, the second controller 504 controls the second bidirectional AC/DC unit 503 to operate in the rectifier mode, the battery controller 602 controls the battery pack 601 to switch to the energy output state according to the auxiliary energy command sent by the first controller 403, so that the bidirectional dynamic wireless charging system is switched to the forward charging state, the electric vehicle enters the dynamic wireless charging lane 20, and the power grid 301 and the battery pack 601 charge the vehicle-mounted battery 70 of the electric vehicle. When the electric automobile is fully charged with electric energy, the electric automobile drives back to the common lane. Otherwise, the first controller 403 sends feedback information rejecting the positive charging request to the second controller 504 (i.e. the load of the power grid exceeds the load threshold), and the electric vehicle continues to run on the normal lane 10 or runs to the adjacent charging pile for charging.
It should be noted that the load of the power grid 301 is divided into two cases within a bearable range, when the load of the power grid 301 is normal (that is, the load of the power grid does not exceed a load rated value), the first controller 403 sends an energy storage command to the battery controller 602, and after receiving the energy storage command, the battery controller 602 controls the battery pack 601 to switch to an energy input state, at this time, the power grid 301 charges the electric vehicle and the battery pack 601; when the load of the power grid 301 is large (that is, the load of the power grid already exceeds the load rating but does not exceed the load critical value), the first controller 403 sends an auxiliary energy command to the battery controller 602, and after receiving the auxiliary energy command, the battery controller 602 controls the battery pack 601 to switch to an energy input state, at this time, the power grid 301 and the battery pack 601 charge the electric vehicle together; when the electric vehicle is fully charged with electric energy, the electric vehicle drives back to the ordinary lane 10.
The embodiment of the invention has the following beneficial effects:
the energy transmitting device and the energy receiving device can switch the working modes according to the electric quantity of the vehicle-mounted battery detected in real time and the load of the power grid, so that the bidirectional dynamic charging among the electric automobile, the storage battery pack and the power grid is realized, on one hand, when the wireless charging system is connected to the electric automobile in a large scale and the power grid load is overlarge, the bidirectional wireless charging system can feed electricity to the power grid in a reverse direction, so that the stable operation of the power grid is ensured, on the other hand, when the electric quantity of the vehicle-mounted battery of the electric automobile is surplus, the storage battery device can recover the electric energy, the energy is saved, on the other hand, the electric automobile can be continuously charged in the running process of a dynamic wireless charging road, and the electric automobile can meet the requirement of high endurance only by being provided with a small number of vehicle. In addition, in the actual operation process, the switching between the forward charging state and the backward feeding state of the bidirectional dynamic wireless charging system is automatically completed by detecting the working states of the power grid, the vehicle-mounted battery pack and the storage battery pack, so that the bidirectional dynamic wireless charging system is an intelligent bidirectional dynamic wireless charging system.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a two-way dynamic wireless charging system of intelligence, includes ordinary lane and wireless charging lane, its characterized in that still includes on-vehicle battery, energy receiving arrangement, energy transmitting device, battery device and electric wire netting input device, wherein:
the vehicle-mounted battery is arranged on the electric automobile and used for providing electric energy for the electric automobile;
the power grid input device is arranged on the wireless charging lane and used for providing electric energy for the vehicle-mounted battery and the storage battery device;
the energy receiving device is arranged on the electric automobile, connected with the vehicle-mounted battery and used for detecting the electric quantity of the vehicle-mounted battery in real time, comparing the real-time detected electric quantity of the vehicle-mounted battery with a set electric quantity value, if the real-time detected electric quantity of the vehicle-mounted battery exceeds the set electric quantity value, detecting a backfeed request sent by the energy transmitting device and a selection signal sent by an automobile owner whether to reject the backfeed request or not, and sending first feedback information, a selected working mode and an entered lane to the energy transmitting device according to the detected backfeed request and the selection signal of the automobile owner; if the set electric quantity value is not exceeded, sending a forward charging request to the energy transmitting device and the storage battery device, and selecting a working mode and an entering lane according to received second feedback information sent by the energy transmitting device;
the energy transmitting device is arranged on the wireless charging lane, connected with the power grid input device and used for detecting the load of the power grid input device in real time, comparing the load of the power grid input device detected in real time with a set power grid load rated value and a power grid load critical value, and if the load of the power grid input device exceeds the set power grid load critical value, sending the feedback request to the energy receiving device and the storage battery device and selecting a working mode according to received first feedback information sent by the energy receiving device; if the set grid load rating is not exceeded, the energy transmitting device sends an energy storage command to the storage battery device; if the power grid load rating exceeds the set power grid load critical value but does not exceed the set power grid load critical value, detecting the forward charging request sent by the energy receiving device, selecting a working mode according to the received forward charging request, sending second feedback information, and sending an auxiliary energy command to the storage battery device;
and the storage battery device is arranged on the wireless charging lane, is connected between the power grid input device and the energy transmitting device, and is used for respectively selecting an energy input state, an energy output state or an energy selection input and output state according to the forward charging request received from the energy receiving device, the backward feeding request received from the energy transmitting device, the backward feeding request received from the energy receiving device, the energy storage command and the auxiliary energy command received from the energy transmitting device.
2. The intelligent bidirectional dynamic wireless charging system of claim 1, wherein the operating modes of the energy receiving device include a rectifying mode and an inverting mode, and the operating modes of the energy transmitting device include a rectifying mode and an inverting mode.
3. The intelligent bidirectional dynamic wireless charging system of claim 2, wherein after the accumulator device receives the backfeed request from the energy transmitting device and the received backfeed request from the energy receiving device, the accumulator device selects a preferred energy in and out state.
4. The intelligent bidirectional dynamic wireless charging system of claim 3, wherein the energy-preferential entry and exit state is to control a high-powered battery in the battery device to switch to an energy-output state and a low-powered battery to switch to an energy-input state.
5. The intelligent bidirectional dynamic wireless charging system of claim 2, wherein the grid input device comprises a grid and an AC/DC converter connected in sequence, the AC/DC converter is connected to a DC bus, the energy transmitting device comprises an energy transmitting coil, a first resonance compensation unit, a first bidirectional AC/DC unit, and a first controller, the energy transmitting coil, the first resonance compensation unit, and the first bidirectional AC/DC unit are connected in sequence, the first controller is connected to the first bidirectional AC/DC unit, the first bidirectional AC/DC unit is connected to the DC bus, the energy receiving device comprises an energy receiving coil, a second resonance compensation unit, a second bidirectional AC/DC unit, and a second controller, the energy receiving coil, The second resonance compensation unit, the second bidirectional AC/DC unit and the vehicle-mounted battery are sequentially connected, the second controller is connected with the second bidirectional AC/DC unit, the storage battery device comprises a storage battery pack and a storage battery pack controller which are sequentially connected, and the storage battery pack is located between the AC/DC converter and the first bidirectional AC/DC unit and is connected with the direct current bus.
6. The intelligent bidirectional dynamic wireless charging system of claim 4, wherein the information exchange between the first controller, the second controller, and the battery pack controller is by way of wireless communication.
7. The intelligent bidirectional dynamic wireless charging system of claim 5, wherein the energy receiving coil is configured to receive electrical energy; the second resonance compensation unit is used for enabling the intelligent bidirectional dynamic wireless charging system to work at a resonance frequency and compensating leakage inductance between the energy receiving coil and the energy transmitting coil; the second bidirectional AC/DC unit is used for switching into a rectification mode or an inversion mode; the second controller is used for detecting the electric quantity of the vehicle-mounted battery in real time, comparing the real-time detected electric quantity of the vehicle-mounted battery with a set electric quantity value, if the real-time detected electric quantity of the vehicle-mounted battery exceeds the set electric quantity value, detecting a backfeed request sent by the first controller and a selection signal sent by a vehicle owner whether to reject the backfeed request or not, sending first feedback information to the energy transmitting device according to the detected backfeed request and the selection signal of the vehicle owner, controlling the second bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode, and selecting to enter the common lane or the wireless charging lane; and if the set electric quantity value is not exceeded, sending a forward charging request to the first controller and the storage battery pack controller, controlling the second bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode according to the received second feedback information sent by the first controller, and sending a signal for selecting to enter the common lane or the wireless charging lane to a vehicle owner.
8. The intelligent bidirectional dynamic wireless charging system of claim 5, wherein the energy transmitting coil is configured to output electrical energy; the first resonance compensation unit is used for enabling the intelligent bidirectional dynamic wireless charging system to work at a resonance frequency and compensating leakage inductance between the energy transmitting coil and the energy receiving coil; the first bidirectional AC/DC unit is used for switching into a rectification mode or an inversion mode; the first controller is used for detecting the load of the power grid input device in real time, comparing the load of the power grid input device detected in real time with a set power grid load rated value and a power grid load critical value, if the load of the power grid input device exceeds the set power grid load critical value, sending the feedback request to the second controller and the storage battery pack controller, and controlling the first bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode according to received first feedback information sent by the second controller; if the set power grid load rating is not exceeded, detecting the forward charging request sent by the second controller, controlling the first bidirectional AC/DC unit to be switched into a rectification mode or an inversion mode and sending second feedback information according to the received forward charging request, and sending an energy storage command to the storage battery controller by the first controller; if the set grid load rating is exceeded but the set grid load threshold is not exceeded, the first controller sends an auxiliary power command to the battery pack controller.
9. The intelligent bidirectional dynamic wireless charging system of claim 5, wherein the battery pack is configured to provide auxiliary power; the storage battery controller is used for detecting the electric quantity of the storage battery pack at regular time, controlling the storage battery pack to be switched to an energy output state according to the forward charging request received from the second controller, and respectively controlling the storage battery pack to carry out energy preferential access, energy input state selection or energy output state according to the backward feeding request received from the first controller, the backward feeding request received from the second controller, and the energy storage command and the auxiliary energy command received from the first controller.
10. An intelligent bidirectional dynamic wireless charging method is characterized in that:
the energy receiving device compares the electric quantity of the vehicle-mounted battery on the electric automobile detected in real time with a set electric quantity value, and the following operations are carried out according to the comparison result:
(a) if the set electric quantity value is exceeded, detecting whether a backfeed request from an energy transmitting device and a selection signal of whether a vehicle owner refuses the backfeed request exist, if the backfeed request is not received or the vehicle owner refuses the backfeed request is received, the electric vehicle runs on a common lane, the energy receiving device is switched to a rectification mode, the energy transmitting device is switched to an inversion mode, a storage battery device is switched to an energy input state, a power grid charges the storage battery device, otherwise, the energy receiving device sends feedback information of accepting the backfeed request to the energy transmitting device and the storage battery device, the electric vehicle enters a wireless charging lane, the energy receiving device is switched to the inversion mode, and the energy transmitting device is switched to the rectification mode, the storage battery device is switched into an energy preferred in-out state, so that a vehicle-mounted battery of the electric automobile and a storage battery pack of the storage battery device with high electric quantity feed back electric energy to the power grid and the storage battery pack of the storage battery device with low electric quantity;
(b) if the detected load of the power grid input device does not exceed a set power grid load rated value, the electric automobile enters a wireless charging lane, the energy receiving device is switched to a rectification mode, the energy transmitting device is switched to an inversion mode, the energy transmitting device transmits an energy storage command to the storage battery pack controller, and the storage battery device is switched to an energy storage state, so that the power grid charges a vehicle-mounted battery of the electric automobile and a storage battery pack of the storage battery device; if feedback information which is sent by the energy transmitting device and receives the forward charging request is received, and the detected load of the power grid input device exceeds a set power grid load rated value but does not exceed a set power grid load critical value, the electric automobile enters a wireless charging lane, the energy receiving device is switched to a rectification mode, the energy transmitting device is switched to an inversion mode, the energy transmitting device sends an auxiliary energy command to the storage battery pack controller, and the storage battery device is switched to an auxiliary energy state; otherwise, the electric automobile continues to run on the common lane or drives to the adjacent charging pile for charging.
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