CN108454440B - Vehicle-to-vehicle charging device and method - Google Patents
Vehicle-to-vehicle charging device and method Download PDFInfo
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- CN108454440B CN108454440B CN201810260158.0A CN201810260158A CN108454440B CN 108454440 B CN108454440 B CN 108454440B CN 201810260158 A CN201810260158 A CN 201810260158A CN 108454440 B CN108454440 B CN 108454440B
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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
- B60L53/60—Monitoring or controlling charging stations
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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
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging 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
- B60L53/14—Conductive 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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y02T90/12—Electric charging stations
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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
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to the field of electronic appliances, and provides a vehicle-to-vehicle charging device and method. The car-to-car charging apparatus includes: the charging and discharging control system comprises a vehicle-mounted bidirectional charger, a charging and discharging connecting device and a control box. The vehicle-mounted bidirectional charger is used for charging other vehicles or receiving the discharge of other vehicles. The charging and discharging connection device is used for connecting a power supply vehicle and a power receiving vehicle, an alternating current control switch is arranged on the control box, and the alternating current control switch controls charging current. According to the invention, the control box is additionally arranged between the charging and discharging connecting devices of the power supply vehicle and the power receiving vehicle, the control box can control the on-off of the charging current, and the charging current is interrupted when an operator operates, so that the operator is prevented from getting an electric shock.
Description
Technical Field
The invention relates to the field of electronic appliances, in particular to a vehicle-to-vehicle charging device and method.
Background
New energy vehicles are a hot spot, and the new energy vehicles are widely concerned about small pollution and energy conservation. Electric automobile belongs to new energy automobile, and no matter electric automobile uses pure electric power or hybrid, after a period of time of traveling, after the electric quantity exhausts, all need to charge the battery. Therefore, the electric vehicle is expected to be popularized, and the charging device is indispensable. However, in some cases, the electric vehicle may run out before reaching the fixed charging device, and there is probably no fixed charging device nearby, so in such cases, the vehicle owner can only search for the rescue trailer to send the electric vehicle to the nearest fixed charging device or charge the vehicle through the mobile charging vehicle equipped with the mobile charging pile, the cost of using the rescue trailer for service is relatively high, and the use of the mobile charging vehicle is inconvenient because the mobile charging vehicle is loaded with charging equipment due to relatively large volume.
A new energy automobile capable of being charged and discharged is already available on the market, and the new energy automobile is provided with a bidirectional vehicle-mounted bidirectional charger capable of being charged and discharged. During charging, the charger can convert alternating current into direct current under the control of a whole vehicle system by receiving and detecting CP signals generated by the alternating current charging pile so as to provide electric energy for the power battery pack; when discharging, the charger converts the electric energy of the power battery into alternating current, and the alternating current is output to the socket through the discharging gun. However, such charging relies on an ac charging post, and discharging can only provide 220V ac power through a socket, i.e., through various loads such as an induction cooker, a microwave oven, and the like. The discharging gun supplies alternating current to the socket, and the charging gun can not be applied to charging a new energy automobile directly by the discharging gun, and cannot be used for road rescue.
Still have the interchange charge-discharge junction equipment between the car to the car among the prior art, can link together power supply vehicle and electrified vehicle through the rifle that discharges and the rifle that charges for the car can charge the road rescue of being convenient for to the car. However, when the ac charging/discharging connection device is inserted into a vehicle requiring discharging through the discharging port and the vehicle requiring charging is not connected through the charging port, the connection device is in a charged state, so that an operator is at risk of electric shock, which has certain disadvantages.
Disclosure of Invention
The invention aims to solve the technical problems that an alternating current charging and discharging connection device is inserted into a power supply vehicle at a discharging port, and when the charging port is not connected, the device is in a charged state, so that an operator is easy to get an electric shock. In order to solve the technical problem, the invention provides a vehicle-to-vehicle charging device and a vehicle-to-vehicle charging method. The invention is realized by the following technical scheme:
a first aspect of the present invention provides a vehicle-to-vehicle charging apparatus, comprising: the charging and discharging control system comprises a vehicle-mounted bidirectional charger, a charging and discharging connecting device and a control box.
The vehicle-mounted bidirectional charger is used for charging a power-receiving vehicle or receiving the discharge of a power-supplying vehicle, and comprises an inverter, a rectifier and a charging and discharging mode control unit, wherein the inverter is used for converting direct current into alternating current so as to provide output electric energy for the vehicle-mounted bidirectional charger through a battery on the vehicle, the rectifier is used for converting the alternating current into the direct current and charging the battery on the vehicle, and the charging and discharging mode control unit is used for controlling the charging direction and switching the working mode of the vehicle-mounted bidirectional charger so that the vehicle-mounted bidirectional charger works in a charging mode or a discharging mode;
the charging and discharging connection device is used for connecting a power supply vehicle and a power receiving vehicle and comprises a matching device, a charging end and a discharging end. The matching device is used for matching a power supply vehicle and a power receiving vehicle, the charging end is connected with the power supply vehicle and used for receiving discharge of the power supply vehicle, and the discharging end is connected with the power receiving vehicle and used for charging the power receiving vehicle;
the control box is used for controlling the on-off of the charging current and the transmission of control signals. The control box comprises a power supply vehicle interface, a power receiving vehicle interface and a CP signal control module. The control box can control the on-off of the charging current, and when an operator operates, the charging current is interrupted, so that the operator is prevented from getting an electric shock.
The vehicle-mounted bidirectional charger can discharge and output 220V electricity, the vehicle-mounted bidirectional charger of the power-receiving vehicle is directly charged in an alternating current slow charging mode, and the vehicle-mounted bidirectional charger of the power-receiving vehicle converts alternating current into direct current to charge a battery on the vehicle.
And the charge-discharge mode switching unit is provided with a current direction controller, and the current direction controller is used for ensuring the directionality of the charging current. That is, it is ensured that the charging current is flowing from the power supply vehicle to the power receiving vehicle, so that the power supply vehicle operates in the discharging mode.
Under the inversion mode, the charge-discharge mode control unit is provided with a booster and a power controller, the booster boosts the voltage of the battery, the inverter directly inverts the boosted battery voltage and maintains constant current through the power controller, so that direct current in the battery is converted into alternating current to be provided for the vehicle-mounted bidirectional charger, the direction of charging current is kept through the current direction controller, and finally the vehicle-mounted bidirectional charger can discharge outwards.
The vehicle-mounted bidirectional charger comprises a CC signal detection circuit and a CP signal detection circuit, wherein the CC signal detection circuit is used for detecting whether CC signals are transmitted successfully or not, the CP signal detection circuit is used for detecting the amplitude of CP signals, and the amplitude of the CP signals can change along with different preparation degrees in a preparation stage before the vehicle is charged. Through the CP detection circuit arranged in the vehicle-mounted bidirectional charger, the degree of charging preparation can be judged according to the amplitude of the detected CP signal.
Furthermore, the power supply vehicle interface on the control box is provided with a three-phase alternating current interface, an N-line interface, a PE-line interface, a CC signal interface and a CP signal interface, and the power receiving vehicle interface on the control box is provided with a three-phase alternating current interface, an N-line interface, a PE-line interface, a CC signal interface and a CP signal interface.
The control box further includes a CP signal detection unit and a CP signal transmission unit, the CP signal interface of the power supply vehicle interface is connected to the CP signal detection unit, and the CP signal interface of the power reception vehicle interface is connected to the CP signal transmission unit.
Further, the alternating current control switch is connected with a three-phase alternating current interface, and the alternating current control switch can control whether three-phase alternating current can be transmitted to the side of the power receiving vehicle. Before the ac control switch is not closed, the charging current cannot be transmitted to the side of the power receiving vehicle and the power supplying vehicle cannot charge the power receiving vehicle.
Further, the PE line interface is connected to a PE line, the CC signal interface is connected to the PE line, and the CC signal is transmitted along the PE line. The CC signal transmission success indicates that the charging and discharging connection device is connected with the power receiving vehicle. When the PE line is on, it means that the CC line is also on, and at this time, the connection between the power-supplying vehicle and the power-receiving vehicle is already established.
A second aspect of the invention provides a vehicle-to-vehicle charging method, the method comprising:
the method comprises the following steps that a first vehicle-mounted bidirectional charger of a power supply vehicle is connected to a charging and discharging connection device, the first vehicle-mounted bidirectional charger is adjusted to be in a charging mode, a CP signal and a CC signal are sent to a second vehicle-mounted bidirectional charger of a power receiving vehicle, the CC signal is used for connection confirmation, and the CP signal is used for control confirmation;
the second vehicle-mounted bidirectional charger of the power-receiving vehicle is connected with the charging and discharging connection device to obtain a CP signal and a CC signal transmitted by the charging and discharging connection device, and the power-receiving vehicle starts self-checking;
after the CC signal wire is conducted, the power supply vehicle adjusts the amplitude of the CP signal, detects the amplitude of the CP signal and confirms that the power receiving vehicle is connected with the charging and discharging connecting device;
after the self-checking of the powered vehicle is finished, the powered vehicle enters a chargeable state, a control switch in a first vehicle-mounted bidirectional charger of the power supply vehicle is closed, the amplitude of a CP signal is adjusted, and the amplitude of the CP signal is detected;
and closing an alternating current control switch on the control box, starting charging, and providing electric energy for the power-receiving vehicle by the power supply vehicle.
Further, the CP signal sent by the first vehicle-mounted bidirectional charger of the power supply vehicle is sent to the control box, and the control box sends the CP signal to the second vehicle-mounted bidirectional charger of the power receiving vehicle.
Further, before the first vehicle-mounted bidirectional charger of the power supply vehicle sends the CP signal, whether the power supply vehicle is connected well with the charge-discharge connection device is judged, and after the connection is confirmed to be good, the first vehicle-mounted bidirectional charger of the power supply vehicle sends the CP signal.
The CP signal is a PWM wave signal, the PWM wave signal is a signal carrying amplitude information and duty ratio information, and the amplitude information is preset amplitude information. The amplitude of the PWM wave signal is adjusted according to the condition of the preparation work in the preparation work before charging, the PWM wave signal is 12V when the power supply vehicle is connected with the charging and discharging connecting device, the PWM wave signal is adjusted to 9V when the power receiving vehicle is connected with the charging and discharging connecting device, and the PWM wave signal is adjusted to 6V when the power receiving vehicle is ready for charging after self-checking.
By adopting the technical scheme, the vehicle-to-vehicle charging device and the vehicle-to-vehicle charging method have the following beneficial effects:
1) the invention provides a vehicle-to-vehicle charging device and method, which are more convenient for road rescue of an electric vehicle, and when the electric vehicle is anchored only due to electricity exhaustion, power can be obtained through other electric vehicles, so that the cost of a trailer is saved;
2) the invention provides a vehicle-to-vehicle charging device.A control box is additionally arranged between charging and discharging connecting devices of a power supply vehicle and a power receiving vehicle, when an alternating current control switch on the control box is not closed, current cannot be transmitted from the power supply vehicle to the power receiving vehicle, and an operator has no risk of electric shock.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a structural diagram of a vehicle-to-vehicle charging apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a vehicle-to-vehicle charging apparatus according to an embodiment of the present invention;
fig. 3 is a flowchart of a vehicle-to-vehicle charging method according to an embodiment of the present invention;
fig. 4 is a structural diagram of a control box on a vehicle-to-vehicle charging device according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1:
as shown in fig. 1 and 2, a vehicle a shown in fig. 1 is a power supply vehicle, and a vehicle B shown in fig. 1 is a power receiving vehicle. The car-to-car charging apparatus includes: the charging and discharging control system comprises a vehicle-mounted bidirectional charger, a charging and discharging connecting device and a control box.
The vehicle-mounted bidirectional charger is used for charging a power-receiving vehicle or receiving the discharge of a power-supplying vehicle, and comprises an inverter, a rectifier and a charging and discharging mode control unit, wherein the inverter is used for converting direct current into alternating current so as to provide output electric energy for the vehicle-mounted bidirectional charger through a battery on the vehicle, the rectifier is used for converting the alternating current into the direct current and charging the battery on the vehicle, and the charging and discharging mode control unit is used for controlling the charging direction and switching the working mode of the vehicle-mounted bidirectional charger so that the vehicle-mounted bidirectional charger works in a charging mode or a discharging mode;
the charging and discharging connection device is used for connecting a power supply vehicle and a power receiving vehicle, and comprises a transmission matching device, a charging end and a discharging end, wherein the transmission matching device is used for transmitting a control signal sent by the power supply vehicle, the charging end is connected with the power supply vehicle and used for receiving the discharge of the power supply vehicle, and the discharging end is connected with the power receiving vehicle and used for charging the power receiving vehicle;
the control box is used for controlling the on-off of the charging current and the transmission of control signals.
The vehicle-mounted bidirectional charger can discharge and output 220V electricity, the vehicle-mounted bidirectional charger of the power-receiving vehicle is directly charged in an alternating current charging mode, and the vehicle-mounted bidirectional charger of the power-receiving vehicle converts alternating current into direct current to charge a battery on the vehicle.
The charging and discharging mode switching unit can control the working mode of the vehicle-mounted bidirectional charger to be a charging mode or a discharging mode. The charging and discharging mode switching unit is provided with a current direction controller, and the current direction controller is used for ensuring the directionality of the charging current, namely ensuring that the charging current flows from the power supply vehicle to the power receiving vehicle, so that the power supply vehicle works in a discharging mode. The current direction controller may be a diode.
Under the inversion mode, the charge-discharge mode control unit is provided with a booster and a power controller, the booster boosts the voltage of the battery, the inverter directly inverts the boosted battery voltage and maintains constant current through the power controller, so that direct current in the battery is converted into alternating current to be provided for the vehicle-mounted bidirectional charger, the direction of charging current is kept through the current direction controller, and finally the vehicle-mounted bidirectional charger can discharge outwards.
The vehicle-mounted bidirectional charger is used for charging other vehicles or receiving discharge of other vehicles, and comprises a CC signal detection circuit and a CP signal detection circuit, wherein the CC signal detection circuit is used for detecting whether CC signals are successfully transmitted, and the CP signal detection circuit is used for detecting the amplitude of a CP signal and judging the current state of the vehicle.
The CC detection circuit is connected with the control box. The CP detection circuit is connected with a diode in parallel, the diode is used for ensuring the directionality of the charging current, and the diode is connected with the control box. The diode is connected with a resistor R2 and a switch S2, and the resistor R2 and the switch S2 are connected in parallel with another resistor R3. The resistor R2 and the resistor R3 which are connected in parallel are connected with the PE wire and grounded. When the switch S2 is closed, the output voltage is increased to 220V, the vehicle-mounted bidirectional charger is in an externally discharging state, and when the switch S2 is not closed, the vehicle-mounted bidirectional charger can receive external charging.
The control box is provided with a power supply vehicle interface and a power receiving vehicle interface. The power supply vehicle interface and the power receiving vehicle interface are respectively provided with a three-phase alternating current interface, an N line interface, a PE line interface, a CC signal interface and a CP signal interface. The power supply vehicle is connected with the power supply vehicle interface through the charge-discharge connecting device, and the power receiving vehicle is connected with the power receiving vehicle interface through the charge-discharge connecting device. Therefore, the signal from the power supply vehicle is guided to the power receiving vehicle through the control box. The control box can control the on-off of the charging current, and when an operator operates, the charging current is interrupted, so that the operator is prevented from getting an electric shock.
The control box is internally provided with a CP signal detection unit and a CP signal sending unit, the CP signal interface of the power supply vehicle interface is connected with the CP signal detection unit, and the CP signal interface of the power receiving vehicle interface is connected with the CP signal sending unit. The CP signal is transmittable from the power-supplying vehicle to the power-receiving vehicle.
The control box is internally provided with three L lines capable of transmitting alternating current, the three L lines are L1, L2 and L3 respectively, the L lines are connected with a three-phase alternating current interface of a power supply vehicle interface and a three-phase alternating current interface of a power receiving vehicle interface, so that the power supply vehicle interface can receive the three-phase alternating current transmitted by a power supply vehicle and transmits the three-phase alternating current to the power receiving vehicle through the power receiving vehicle interface. And each L line is provided with an alternating current control switch for controlling alternating current charging current. When the alternating current control switch is not switched on, the current cannot be transmitted to the side of the power receiving vehicle, so that when the operator connects the charging and discharging connection device to the charging port under the condition that the discharging port is connected, the charging current does not exist on the connection device, and the operator cannot get an electric shock.
And a PE line and an N line are arranged in the control box. The power supply vehicle interface is characterized in that a PE line interface of the power supply vehicle interface and a PE line interface of the power receiving vehicle interface are connected with a PE line, and an N line interface of the power supply vehicle interface and an N line interface of the power receiving vehicle interface are connected with an N line. The PE line is used for ground protection and the N line is neutral.
And the CC signal interface on the control box can receive the CC signal transmitted by the power supply vehicle and transmit the CC signal to the power receiving vehicle. The CC signal interface at the power supply vehicle interface is connected with a resistor R4 in series, the resistor is connected with a switch S3 in series, a switch S3 is connected with another resistor RC in parallel and is connected with a PE wire, and the CC signal is transmitted to the power receiving vehicle interface through the PE wire. The CC signal interface at the interface of the power receiving vehicle receives the transmitted CC signal, two resistors and a switch are arranged at the interface, and the switch is connected with one of the resistors in parallel.
The CC signal line and the PE line are used together to confirm whether or not the electric vehicle and the charge/discharge connection device are completely connected. When the CC signal line and the PE line are conducted, they are completely connected. The CC signal line is also used for charging confirmation, and the hard connection of the CC signal line is maintained during charging, and if the CC signal line is disconnected, the charging is stopped under the hardware control.
The signal transmitted on the CP signal line is a PWM wave signal, and the electric vehicle realizes the start of charging, the end of charging by detecting the state of the PWM wave signal, and adjusts the charging current by adjusting the duty ratio of the PWM wave signal. After the connection of the power supply vehicle to the charge/discharge connection device is confirmed, the CP signal generating unit transmits a PWM wave signal of 12V. When the connection of the power receiving vehicle to the charge/discharge connection device is confirmed by the conduction of the CC signal line and the PE line, the 12V PWM wave signal transmitted by the CP signal generation unit becomes a 9V PWM wave signal. After the power receiving vehicle is connected to the charge/discharge connection device, the power receiving vehicle performs self-check, and when the power receiving vehicle is ready, the 9V PWM signal transmitted by the CP signal generation unit is changed to a 6V PWM signal, and the power supply vehicle can start charging the power receiving vehicle.
When the power supply vehicle transmits a CP signal of 12V, the charging current is already sent out along with the transmission of the CP signal. However, the alternating current control switch on the control box is not closed, so that the charging current cannot be transmitted to one side of the powered vehicle, the risk of electric shock of an operator is eliminated, and the operation is simpler, more convenient and safer.
The amplitude of the PWM wave signal is detected through a CP detection circuit, the position where the CP detection circuit is connected with a lead is a detection point, and the CP detection circuit detects the current voltage amplitude of the PWM wave signal, so that the states of the power supply vehicle and the power receiving vehicle are judged.
Example 2:
an embodiment of the present invention provides a method for charging a vehicle from a vehicle to a vehicle, and as shown in fig. 3, the method includes:
s1, a first vehicle-mounted bidirectional charger of a power supply vehicle is connected into a charging and discharging connection device, and a CP signal and a CC signal are sent to a second vehicle-mounted bidirectional charger of a power receiving vehicle, wherein the CC signal is used for connection confirmation, and the CP signal is used for controlling confirmation
S2, a second vehicle-mounted bidirectional charger of the power-receiving vehicle is connected with the charging and discharging connection device to obtain a CP signal and a CC signal transmitted by the charging and discharging connection device, connection confirmation is carried out if the CC signal is transmitted successfully, and the power-receiving vehicle starts self-checking;
s3, after the power supply vehicle is conducted on the CC signal line, adjusting the amplitude of the CP signal, detecting the amplitude of the CP signal, and confirming that the power receiving vehicle is connected with the charging and discharging connecting device;
s4, after the self-checking of the powered vehicle is finished, the powered vehicle enters a chargeable state, a control switch in a first vehicle-mounted bidirectional charger of the power supply vehicle is closed, the amplitude of the CP signal is adjusted, the amplitude of the CP signal is detected, and the readiness of the powered vehicle is confirmed;
and S5, closing an alternating current control switch on the control box, transmitting the alternating current output by the power supply vehicle to one side of the power receiving vehicle, starting charging, and providing electric energy for the power receiving vehicle by the power supply vehicle.
Further, a control box is arranged on the charging and discharging connection device, after the self-checking of the electrified vehicle is finished, and a second vehicle-mounted bidirectional charger switch of the electrified vehicle is closed, an alternating current control switch on the control box is closed, and the circuit is communicated. And the CP signal sent by the first vehicle-mounted bidirectional charger of the power supply vehicle is sent into the control box, and the control box sends the CP signal to the second vehicle-mounted bidirectional charger of the power receiving vehicle. When the power supply vehicle transmits the CP signal, the charging current is already sent out along with the transmission of the CP signal. However, the alternating current control switch on the control box is not closed, so that the charging current cannot be transmitted to one side of the powered vehicle, the risk of electric shock of an operator is eliminated, and the operation is simpler, more convenient and safer.
The control box is provided with a power supply vehicle interface and a power receiving vehicle interface. The power supply vehicle interface and the power receiving vehicle interface are respectively provided with a three-phase alternating current interface, an N line interface, a PE line interface, a CC signal interface and a CP signal interface. The power supply vehicle is connected with the power supply vehicle interface through the charge-discharge connecting device, and the power receiving vehicle is connected with the power receiving vehicle interface through the charge-discharge connecting device. Therefore, the signal from the power supply vehicle is guided to the power receiving vehicle through the control box. Under the condition that the discharging port is connected, when an operator connects the charging and discharging connecting device to the charging port, no charging current exists on the connecting device, and the operator does not get an electric shock.
Further, before the first vehicle-mounted bidirectional charger of the power supply vehicle sends the CP signal, whether the power supply vehicle is connected well with the charge-discharge connection device is judged, and after the connection is confirmed to be good, the first vehicle-mounted bidirectional charger of the power supply vehicle generates and sends the CP signal.
Example 3:
the embodiment of the invention provides a control box, which is arranged on a vehicle-to-vehicle charging and discharging connection device and is used for accessing and controlling signals sent by a power supply vehicle and transmitting the signals to a power receiving vehicle.
As shown in fig. 4, the vehicle a is a power supply vehicle, and the vehicle B is a power receiving vehicle. The control box is provided with a power supply vehicle interface and a power receiving vehicle interface, and is also provided with a CP signal detection unit and a CP signal transmission unit, wherein the CP signal detection unit is connected with one side of the power supply vehicle, and the CP signal transmission unit is connected with one side of the power receiving vehicle.
The power supply vehicle interface and the power receiving vehicle interface are respectively provided with a three-phase alternating current interface, an N line interface, a PE line interface, a CC signal interface and a CP signal interface. Three-phase alternating current conducting wires L1, L2 and L3, an N wire and a PE wire are correspondingly arranged in the control box. The CC signals are transmitted through the PE wire, the CP signals sent by the power supply vehicle are connected with the CP signal detection unit, and the CP signals received by the power receiving vehicle are sent to the power receiving vehicle through the CP signal sending unit.
In each of the three-phase ac power conductors L1, L2, and L3, there is an ac control switch, and when the ac control switch is not closed, the charging current supplied from the power supply vehicle cannot be transmitted to the power receiving vehicle side. Most of the charging and discharging connecting devices are charging guns and discharging guns, and if no control box exists, the gun heads of the charging guns can have current before the electrified vehicles are connected, so that operators are in danger of electric shock. After having set up control box and AC control switch, the break-make of charging current can be controlled to the control box, when operating personnel operates, interrupts charging current, avoids operating personnel to electrocute.
The CP signal detecting unit is for detecting an amplitude of the CP signal. In different stages of charging preparation, the amplitudes of the CP signals are different, and the CP signal detection unit may obtain a current preparation state according to the amplitudes of the CP signals, so as to determine whether the ac control switch is properly connected at this time.
The signal transmitted on the CP signal line is a PWM wave signal, and the electric vehicle realizes the start of charging, the end of charging by detecting the state of the PWM wave signal, and adjusts the charging current by adjusting the duty ratio of the PWM wave signal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A vehicle-to-vehicle charging apparatus, comprising: the charging and discharging control system comprises a vehicle-mounted bidirectional charger, a charging and discharging connecting device and a control box;
the vehicle-mounted bidirectional charger is used for charging a power receiving vehicle or receiving the discharge of a power supply vehicle, and comprises an inverter, a rectifier and a charge-discharge mode control unit, wherein the charge-discharge mode control unit is used for controlling the charging direction and switching the working mode of the vehicle-mounted bidirectional charger;
the charging and discharging connection device is used for connecting a power supply vehicle and a power receiving vehicle, and comprises a matching device, a charging end and a discharging end, wherein the matching device is used for matching the power supply vehicle and the power receiving vehicle, the charging end is connected with the power supply vehicle and used for receiving the discharging of the power supply vehicle, and the discharging end is connected with the power receiving vehicle and used for charging the power receiving vehicle;
the control box is used for controlling the on-off of charging current, three L lines capable of transmitting alternating current are arranged in the control box, the L lines are connected with a three-phase alternating current interface of a power supply vehicle interface and a three-phase alternating current interface of a power receiving vehicle interface, and each L line is provided with an alternating current control switch for controlling the alternating current charging current; the control box comprises a power supply vehicle interface, a power receiving vehicle interface and a CP signal control module; the CP signal control module comprises a CP signal detection unit and a CP signal transmission unit, the CP signal detection unit is connected with the power supply vehicle interface, and the CP signal transmission unit is connected with the power receiving vehicle interface; the CP signal detection unit is used for detecting the amplitude of the CP signal, and the current preparation state is obtained according to the detected amplitude of the CP signal so as to control the on-off of the alternating current control switch.
2. The vehicle-to-vehicle charging device according to claim 1,
and the charge-discharge mode switching unit is provided with a current direction controller, and the current direction controller is used for ensuring the directionality of the charging current.
3. The vehicle-to-vehicle charging device according to claim 1, wherein the control box is provided with an ac control switch, and when the ac control switch is closed, the charging current is transmitted to one side of the power receiving vehicle.
4. The vehicle-to-vehicle charging device according to claim 1, wherein the power supply vehicle interface on the control box comprises a three-phase alternating current interface, an N-wire interface, a PE-wire interface, a CC signal interface and a CP signal interface;
the electrified vehicle interface on the control box comprises a three-phase alternating current interface, an N line interface, a PE line interface, a CC signal interface and a CP signal interface.
5. The vehicle-to-vehicle charging device of claim 4, wherein the CP signal control module on the control box comprises: the power supply system comprises a CP signal detection unit and a CP signal transmission unit, wherein the CP signal interface in the power supply vehicle interface is connected with the CP signal detection unit, and the CP signal interface in the power receiving vehicle interface is connected with the CP signal transmission unit.
6. The vehicle-to-vehicle charging device according to claim 1, wherein the vehicle-mounted bidirectional charger comprises a CP signal detection circuit and a CC signal detection circuit, the CP signal detection circuit is used for detecting the amplitude of a CP signal, and the CC signal detection circuit is used for detecting the amplitude of a CC signal.
7. A vehicle-to-vehicle charging method, characterized in that the vehicle-to-vehicle charging is performed by the vehicle-to-vehicle charging apparatus of any one of claims 1 to 6, the method comprising:
a first vehicle-mounted bidirectional charger of a power supply vehicle is connected to a charging and discharging connection device, the first vehicle-mounted bidirectional charger is adjusted to be in a discharging mode, and sends a CP signal and a CC signal to a second vehicle-mounted bidirectional charger of a power receiving vehicle, wherein the CC signal is used for connection confirmation, and the CP signal is used for control confirmation;
the second vehicle-mounted bidirectional charger of the power-receiving vehicle is connected with the charging and discharging connection device to obtain a CP signal and a CC signal transmitted by the charging and discharging connection device, and the power-receiving vehicle starts self-checking;
after the CC signal is successfully transmitted, the amplitude of the CP signal is adjusted by the power supply vehicle, the amplitude of the CP signal is detected, and the fact that the power receiving vehicle is connected with the charging and discharging connecting device is confirmed;
after the self-checking of the powered vehicle is finished, the powered vehicle enters a chargeable state, a control switch in a first vehicle-mounted bidirectional charger of the power supply vehicle is closed, the amplitude of a CP signal is adjusted, and the amplitude of the CP signal is detected;
and when the current preparation state is determined to be the end of charging preparation according to the detected amplitude of the CP signal, closing an alternating current control switch on the control box, starting charging, and supplying electric energy to the power receiving vehicle by the power supply vehicle.
8. The method as claimed in claim 7, wherein the CP signal sent by the first vehicle-mounted bidirectional charger of the power supply vehicle is sent to the control box, and the CP signal is sent by the control box to the second vehicle-mounted bidirectional charger of the power receiving vehicle.
9. The vehicle-to-vehicle charging method according to claim 7, wherein before the first vehicle-mounted bidirectional charger of the power supply vehicle sends the CP signal, whether the power supply vehicle is well connected with the charging and discharging connection device is judged, and after the good connection is confirmed, the first vehicle-mounted bidirectional charger of the power supply vehicle sends the CP signal.
10. The vehicle-to-vehicle charging method according to claim 7, wherein the CP signal is a signal carrying at least amplitude information and duty ratio information, and the amplitude information is preset amplitude information.
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| DE102021212555A1 (en) | 2021-11-08 | 2023-05-11 | Vitesco Technologies GmbH | Control unit for an electric vehicle |
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| CN111231699B (en) * | 2020-02-14 | 2022-01-14 | 威马智慧出行科技（上海）有限公司 | Car is device and vehicle of filling each other |
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| DE102021212555A1 (en) | 2021-11-08 | 2023-05-11 | Vitesco Technologies GmbH | Control unit for an electric vehicle |
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