TWI779443B - Active charging recovery system for electric vehicle - Google Patents

Abstract

The present invention is an active charging recovery system for an electric vehicle. The active charging recovery system is installed in an electric vehicle charging device. A charging control unit in the charging recovery system generates a charging reset command when the connection state of a vehicle end coupler is connected but the charging is not performed, or other conditions such as vehicle end request or charging end request, etc. The charging reset command is used to reset a charging coupling interface connected to the electric vehicle by switching a control loop. In the present invention, the charging detection and reset switching mechanism can use to achieve the charging recovery of the electric vehicle when the charging is interrupted and the power is restored, so the existing problem of manually re-plugging and inserting the gun can be solved.

Description

Active recovery system for electric vehicle charging

The invention relates to the technology of electric vehicle charging, in particular to an active recovery system for electric vehicle charging.

With the popularization of electric vehicles, the power demand of the field is relatively increased, which leads to many problems in use. For example, when the power of the field is limited or the power supply of the whole field is in short supply, the power supply of the field needs to be adjusted and reduced. Or when charging is suspended, the electric vehicle passively accepts the drop in charging power or suspends charging. At this time, the control system of the vehicle will misjudge that the power in the field is unstable, and then actively stop charging. In this case, when the power supply in the field returns to normal Even though the electric vehicle is still connected to the charging equipment in the field through the charging interface, the charging equipment cannot return to the state of charging the electric vehicle because the electric vehicle is still in the wrong mode of charging interruption.

Specifically, in the design of the control system of common electric vehicles at present, there will be three states A, B and C when the vehicle is charged. Among them, if the electric vehicle enters the charging error state due to the interruption of charging, it is in state B at this time. The current processing method can only be manually disconnected and reconnected by the personnel, that is, to draw the gun and reinsert it, so that the vehicle Terminal reset (reset) back to state A, and then enter the charging state again, and then the owner of the charging process It is far away from the parking area. Of course, no one can pull out the gun and reinsert it. This may cause the electric vehicle to be unable to continue charging. It can be seen from the above that even with the development and maturity of the management and control of field power, energy storage systems, micro-grids, two-way charging and discharging systems, and peak-shaving and valley-filling mechanisms for power supply, the above-mentioned power regulation situation is more likely to occur , It will also cause the electric vehicle to fail to return to normal charging, and the vehicle power is not fully charged when the vehicle is mainly used.

In addition, due to the difference in electricity prices between daytime and nighttime, in order to achieve the purpose of reducing electricity costs, some current electric vehicles have the function of reserving charging, but it must be controlled through the vehicle side, and the non-charging equipment side can be controlled, and it is not All vehicles have this function, so the scheduled charging function cannot be applied to all electric vehicles.

In view of this, how to provide a technology for active recovery control of electric vehicle charging, especially, during the charging process of electric vehicles, the charging is interrupted due to various factors such as power drop or suspension of charging, but the electric vehicle can still be powered on after the power is restored. Continuous charging, or the scheduled charging setting for electric vehicles, without the need to reset the charging state of the vehicle control by manually pulling out or inserting the gun, will become the goal pursued by those skilled in the art.

In order to solve the above-mentioned problems in the prior art, the present invention proposes a charging active recovery mechanism for electric vehicles, which provides a simulated disconnection state for the case of an abnormal power failure and then power recovery between the electric vehicle and the charging terminal, so that the electric vehicle The charging status of the terminal can be reset to resume charging, and the present invention can have a scheduled charging function, and the charging status can be reset at the scheduled time to start charging.

The present invention proposes an active recovery system for electric vehicle charging, which is installed in an electric vehicle charging device. The active recovery system for electric vehicle charging includes: a charging coupling interface state detection unit The unit is used to detect the connection state and charging state of the coupler at the vehicle end; the field power state detection unit is used to detect the voltage and current state of the power output at the parking area end; the charging control unit is connected to the charging The coupling interface state detection unit and the field power state detection unit are used to receive the detection results from the charging coupling interface state detection unit and the field power state detection unit, so as to connect to the vehicle end coupler When the loop state is connected but not charged, a charging reset command is generated; and the switching control loop is connected to the charging control unit for receiving the charging reset command from the charging control unit so as to connect to the vehicle The charging coupling interface resets the loop state, so that the connected loop state of the vehicle end is reset to the unconnected state through the loop state reset of the charging coupling interface.

In one embodiment, the electric vehicle charging device is connected with the vehicle end coupler through the charging coupling interface.

In one embodiment, the electric vehicle charging device is connected to the field power supply module at the parking lot side through a power connection interface.

In the above embodiment, a charging power switch located between the power connection interface and the charging coupling interface is further included to control the power output at the parking lot end.

In one embodiment, the charging coupling interface state detection unit generates a charging detection result according to the connection state and charging state of the vehicle-side coupler, and the field power state detection unit generates a charging detection result according to the voltage and The current state generates a power supply result, so that the charging control unit generates the charging reset command according to the charging detection result and the power supply result.

In one embodiment, when the charging control unit finds that the power is off during the charging process, but the detection results of the charging coupling interface state detection unit and the field power state detection unit are normal, the charging control unit generates the Charge reset command.

In one embodiment, it includes a power sharing control system connected to the electric vehicle charging device, and the charging control unit receives a reset request from the power sharing control system, so as to make the charging coupling interface perform a loop state reset.

In the above-mentioned embodiment, the reset request of the power sharing control system is generated by the back-end platform after the vehicle owner reports back to the back-end platform to request the power sharing control system.

In the above-mentioned embodiment, the reset request of the power sharing control system is generated when the backend platform receives an error message generated by the vehicle and makes a request to the power sharing control system.

In the above embodiments, the reset request of the power sharing control system refers to the request generated by the power sharing control system when the power sharing control system stops charging and allows charging again.

In the above-mentioned embodiment, the reset request of the electric power sharing control system refers to the interruption of charging of the electric vehicle caused by the reduction of charging power caused by the restriction of the field power consumption at the parking lot end, when the normal charging is allowed again , generated by the power sharing control system.

In addition, when the electric power sharing control system receives the scheduled charging request sent by the back-end platform, the switch control loop is connected to the vehicle-end coupler when the charging coupling interface state detection unit detects that the vehicle-end The state of the connected circuit remains unconnected, so that when charging is scheduled to start, the charging control unit is notified to generate a charge start command, so that the state of the connected circuit at the vehicle end enters the connected state.

To sum up, the present invention is an active recovery system for electric vehicle charging, which is mainly a recovery mechanism for the interruption of charging when the electric vehicle is charging. In addition, like a mechanical parking tower, the electric vehicle will be moved to other floors or heights and simultaneously Provide charging. When charging is abnormally interrupted at the charging end or the vehicle end, the current technology cannot continue to charge after the power is restored. It can only be done by manually re-plugging the charging plug To reset the charging state of the vehicle end, the present invention proposes a detection and reset switching mechanism. An electric vehicle charging active recovery system is set in the electric vehicle charging device to judge that the connection state of the vehicle end coupler is connected but not connected. Under charging, or other conditions such as vehicle-side requirements or charging-side requirements, the charging control unit generates a charging reset command to switch the control loop to make the charging coupling interface connected to the vehicle side perform loop state recovery, so as to Reset the connection circuit state of the vehicle end to the unconnected state, and then restart the charging process, that is, even if the vehicle end returns to the state of not plugging in the charging cable, and then changes to the state of plugging in the charging cable and charging, so as to achieve the charging of electric vehicles The charging recovery when the power is interrupted and restored also solves the existing problem that the gun can only be pulled out manually. In addition, the present invention can realize the scheduled charging function. After the user inserts the gun, the disconnected state will be simulated first, and then the charging state will be reset at the scheduled time to start charging, which can better meet the user's demand for scheduled charging.

1: Electric vehicle charging active recovery system

11: Charging coupling interface state detection unit

12: Field power state detection unit

13: Charging control unit

14: Switch control loop

2: Electric vehicle charging device

21: Charging coupling interface

22: Power connection interface

23: Charging power switch

3: Vehicle end coupler

4: Field power supply module

5: Power sharing control system

6: Back-end platform

7: Electric vehicles

71:Electric vehicle terminal control system

72: Electric vehicle battery system

8: car owner

100: connection status and charging status

200: Voltage and current status

FIG. 1 is a system architecture diagram of an active recovery system for electric vehicle charging according to the present invention.

FIG. 2 is a system architecture diagram of another embodiment of the electric vehicle charging active recovery system of the present invention.

3A and 3B are schematic diagrams of the reset procedure executed in different situations of the electric vehicle charging active recovery system of the present invention.

FIG. 4 is a structural diagram of a specific embodiment of an active recovery system for electric vehicle charging according to the present invention.

The following describes the technical content of the present invention through specific embodiments, and those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. However, the present invention can also be implemented or applied in other different specific implementation forms.

When charging an existing electric vehicle, no matter the charging process is accidentally interrupted, or the judgment of the vehicle-side system is interrupted due to weak current, when the power source is restored, the charging state cannot be automatically restored. This is based on the charging process of the vehicle-side system. There are three types status, no gun plugged, plugged gun, and charging. After the power is interrupted and resumed, because the charging gun is still plugged into the vehicle, it can only return to the status of the gun plugged in. However, this is not a normal charging procedure, that is, it cannot be entered In the state of charging, the gun can only be manually re-drawn and reinserted. If the person is next to the vehicle, it can be solved, but the person has left the vehicle, which will cause the electric vehicle to be unable to charge smoothly, especially if the electric vehicle is parked at a place that includes a charging function. In the mechanical parking tower, the driver can only start charging after parking the car on the vehicle platform and plugging in the charging cable (charging has not yet started), and then wait for the movable vehicle platform to be moved to an appropriate position. The charging interruption situation may not be solved by the current method, so the present invention proposes a solution mechanism for this kind of problem.

FIG. 1 is a system architecture diagram of an active recovery system for electric vehicle charging according to the present invention. As shown in the figure, the electric vehicle charging active recovery system 1 proposed by the present invention is set in the electric vehicle charging device, and the electric vehicle charging device provides charging control for electric vehicles, wherein the electric vehicle charging active recovery system 1 is It includes a charging coupling interface state detection unit 11 , a field power state detection unit 12 , a charging control unit 13 and a switching control circuit 14 .

The state detection unit 11 of the charging coupling interface is used for detecting the connection state and charging state 100 of the vehicle end coupler. To put it simply, the state detection unit 11 of the charging coupling interface can provide a state signal to the charging control unit 13 according to the connection state of the coupler of the electric vehicle, and then perform subsequent charging control.

The field power state detection unit 12 is used to detect the voltage and current state 200 of the power output of the parking lot end. That is to say, the field power state detection unit 12 can obtain the field power output of the parking lot. Generally, the field power output can be known through voltage and current measurement.

The charging control unit 13 is connected to the charging coupling interface state detection unit 11 and the field power state detection unit 12, and can be used to receive information from the charging coupling interface state detection unit 11 and the field power state detection unit 12. The detection result is used to generate a charging reset command when the connection state of the vehicle-side coupler is connected but not charged. In short, the main function of the charging control unit 13 is to judge the charging state of the electric vehicle and control the power transmission. The field power state detection unit 12 obtains the connection and charging status of the vehicle end and the field end, and then judges whether to perform a charging reset. In a common situation, if the connection status of the vehicle end coupler is connected, but the field end Failure to provide charging means that the charging gun is plugged into the electric vehicle, but the charging cannot be performed. At this time, the charging control unit 13 judges that the charging is wrong, and then generates a charging reset command.

The switching control circuit 14 is connected to the charging control unit 13, and is used to receive the charging reset command from the charging control unit 13, so as to make the charging coupling interface connected to the vehicle end perform loop state recovery, so that the charging coupling interface can The circuit status resets to reset the connected circuit status of the vehicle to the unconnected status, and then restarts the charging procedure. Specifically, the main function of the switching control circuit 14 is to switch the detection state of the charging coupling interface state detection unit 11. In other words, after the switching control circuit 14 receives the charging reset command, it will make the charging coupling interface state detection unit 11. The detection state is switched. At this time, the charging coupling interface of the electric vehicle charging device connected to the vehicle end will perform a circuit state reset, that is, simulate an open circuit state, and then notify through the electric vehicle charging device and the control pilot on the vehicle end. The vehicle side, so that the connection circuit status of the vehicle side is reset to the unconnected state.

Afterwards, the connection circuit status of the control system on the vehicle side returns to the unconnected state (that is, the charging gun is not plugged in), and then it is judged that the charging gun has been inserted (in fact, the charging gun is not plugged in), and then it can enter the charging state, so That is to say, it can achieve the purpose of charging recovery after power failure due to unexpected reasons.

FIG. 2 is a system architecture diagram of another embodiment of the electric vehicle charging active recovery system of the present invention. As shown in the figure, the electric vehicle charging active recovery system 1 of FIG. The charging power switch 23 between the charging coupling interface 21 .

Specifically, the electric vehicle charging device 2 is connected to the vehicle-side coupler 3 through the charging coupling interface 21, and the electric vehicle charging device 2 is connected to the field power supply module 4 at the parking lot end through the power connection interface 22. The vehicle charging device 2 acts as an intermediary, and can transmit the electric power of the field power supply module 4 at the parking lot end to the vehicle end coupler 3, and then charge the electric vehicle. In addition, there is a charging power switch 23 between the charging coupling interface 21 and the power connecting interface 22, which is used for the power output control of the parking area side. More specifically, under normal operating conditions, the charging control unit 13 will The state (inserted gun) determines whether the field power supply module 4 can start to supply power. If it can supply power, the power is delivered to the electric vehicle by controlling the charging power switch 23 .

In an operating situation, the charging coupling interface state detection unit 11 is connected to the vehicle-side coupler 3 through the charging coupling interface 21 to generate a charging detection result according to the connection status and charging state of the vehicle-side coupler 3 , and the field The field power state detection unit 12 is connected to the field power supply module 4 through the power connection interface 22 to generate power supply results according to the output voltage and current state of the parking lot end, and then the charging control unit 13 according to the charging detection As a result and the power supply result, it is judged whether to generate a charging reset command.

In another operating situation, if the charging control unit 13 finds that the power is off during the charging process, but the detection results of the charging coupling interface state detection unit 11 and the field power state detection unit 12 are normal, then the charging control unit 13 A charging reset command can still be generated to restart the charging process.

In one embodiment, a power sharing control system 5 connected to the electric vehicle charging device 2 is installed in the parking lot, and its purpose is to externally control the power supply of the field power supply module 4, that is, the field power supply module 4 Whether or not to supply power to the electric vehicle charging device 2 can also be determined by the electric power sharing control system 5 . The sharing referred to above refers to the fact that the electric power of the field power supply module 4 is not only used for charging electric vehicles, but also needs to supply the electric power of the entire parking lot. Therefore, through the power integration of the electric power sharing control system 5, the field The domain power supply module 4 provides or adjusts power for various objects.

In an operating scenario, if the electric vehicle stops charging and then allows charging again due to the power adjustment of the electric power sharing control system 5, it means that the charging process has been interrupted, and it will cause the vehicle end to be unable to recharge. To resume charging, the power sharing control system 5 can also send a reset request to request the charging control unit 13 to execute the reset procedure.

In addition, the electric power sharing control system 5 can be connected with the back-end platform 6 to send commands and transmit information through a wired or wireless network, that is, the electric power sharing control system 5 can return the usage status of each vehicle platform, such as charging state, and the back-end platform 6 can also issue instructions to the power sharing control system 5 according to the demand, and then the power sharing control system 5 controls the charging control unit 13 .

In an operation situation, when the charging control unit 13 receives a reset request from the power sharing control system 5 , it causes the charging coupling interface 21 to perform a loop state reset. In short, if the charging control unit 13 receives a reset request from the power sharing control system 5, it can also execute the circuit status reset of the charging coupling interface 21, and the reset request of the power sharing control system 5 may come from an external request, such as from The back-end platform 6 will be further described in different embodiments later.

3A and 3B are schematic diagrams of the reset procedure executed in different situations of the electric vehicle charging active recovery system of the present invention. As shown in Figure 3A, the backend platform 6 receives the report generated by the electric vehicle 7 If there is an error message, the system or personnel of the back-end platform 6 can issue an instruction to the power sharing control system 5 to request the power sharing control system 5 to notify the relevant units in the electric vehicle charging device 2 to perform a reset procedure. In this aspect, the main reason is that the electric vehicle 7 can detect whether the charging is smooth. If the electric vehicle 7 finds that the charging is interrupted, it can send a message from the back-end platform 6 through the communication system in the vehicle, and the back-end platform 6 will immediately receive the message. It can be checked whether there is a charging problem, and if so, further control the electric power sharing control system 5 to execute the reset procedure.

As shown in FIG. 3B , the car owner 8 reports back to the backend platform 6 so that the backend platform 6 makes a reset request to the power sharing control system 5 . In this mode, usually the car owner 8 can know the charging status through a communication device (such as installing an application program (APP)). If the car owner 8 finds that the charging is interrupted but the electric vehicle is not fully charged, the car owner 8 can send a message or notify the backend The platform 6 and the back-end platform 6 can check whether there is a charging problem after receiving it, and if so, further control the power sharing control system 5, and then require the relevant units in the electric vehicle charging device 2 to perform a reset procedure.

FIG. 4 is a structural diagram of a specific embodiment of the electric vehicle charging active recovery system of the present invention, and the present invention is described here through a specific embodiment. As shown in the figure, the electric vehicle charging active recovery system is located in the electric vehicle charging device 2. The electric vehicle charging device 2 and the electric vehicle 7 are connected through a charging coupling interface 21. The electric vehicle charging device 2 and the field power supply module The groups 4 are connected through the power connection interface 22, wherein, the charging coupling interface 21 and the power connection interface 22 mean that both ends of the connection have corresponding joint mechanisms, which are only briefly drawn here. In addition, the electric vehicle 7 has an electric vehicle end control system 71 and an electric vehicle battery system 72, wherein the electric vehicle end control system 71 mainly provides connection judgment, that is, the aforementioned connection status (not inserted, inserted, charging) The electric vehicle battery system 72 is related to the battery and charge control of the electric vehicle.

The charging control unit 13 can obtain the connection state and charging state of the vehicle-side coupler through the charging coupling interface state detection unit 11, and at the same time obtain the current power output through the feedback signal of the field power state detection unit 12 and the charging power switch 23 Voltage and current state, after that the charge control unit 13 through Through the situational analysis to confirm whether the reset procedure needs to be driven, if the reset procedure needs to be started, the switching control circuit 14 is required to reset the charging coupling interface 21 to restart the charging procedure. The detection results of the unit 11 and the field power state detection unit 12 may also be initiated by the external power sharing control system 5 .

In addition, referring to Fig. 2, 3B and Fig. 4, the car owner can also set the scheduled charging through the back-end platform 6, wherein, when the power sharing control system 5 receives the scheduled charging request sent by the back-end platform 6, it will make the switching control circuit 14 in the The state detection unit 11 of the charging coupling interface detects that the coupler 3 at the vehicle end is connected, so that the state of the connection circuit at the vehicle end remains unconnected, so as to notify the charging control unit 13 when the scheduled charging starts (that is, when the scheduled time is up). Generate a charging start command to make the connection circuit state of the vehicle end into a connected state. In other words, when the owner 8 inserts the gun, he will not directly enter the charging program, but keep the switching control circuit 14 in the disconnected state (that is, the charging of the electric vehicle The device 2 thinks that the gun has not been inserted), and when the scheduled time for charging arrives, the charging start command is transmitted, so that the switching control circuit 14 is normally turned on and enters the normal charging process. For example, after the back-end platform 6 receives the reserved charging demand of the car owner 8, when the car owner 8 connects the charging coupling interface 21 to the vehicle coupler 3, the back-end platform 6 can notify the charging control unit 13 through the power control system 5, and then Keep the switching control loop 14 in a disconnected state, and temporarily stop the charging procedure until the scheduled charging time is up, then reset the switching control loop through the aforementioned process through the back-end platform 6, and start the charging procedure for the electric vehicle Carry out charging to achieve the effect of scheduled charging.

It should be noted that the system, module, and unit described in the present invention can be composed of software, firmware, or hardware components, and can also be completed through a physical circuit structure, such as a charging coupling interface, a power connection interface, and a charging power switch. Physical components, the switching control loop is a physical circuit structure, and other units or modules can be completed by a combination of software and hardware, but not limited to this, and the relevant circuits or mechanism components will not be described here.

To sum up, the present invention is an active recovery system for electric vehicle charging, which mainly detects the power change and the connection of the charging interface in the electric vehicle charging device, and then actively activates the switching control circuit when the recovery process needs to be activated. , so that the charging control system of the vehicle can return to the initial state, and the start of the reset procedure includes the internal components of the electric vehicle charging device to judge by itself or an order from an external system. Therefore, the active recovery system for electric vehicle charging of the present invention can restore electric power without manual operation of the charging interface again in the event of field power fluctuations, interruptions, power regulation control, or scheduled charging. Vehicle charging operation.

The above-mentioned embodiments are for illustrative purposes only, and are not intended to limit the present invention. Anyone skilled in the art can make modifications and changes to the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is defined by the scope of patent application attached to the present invention, as long as it does not affect the effect and implementation purpose of the present invention, it should be included in this disclosed technical content.

1: Electric vehicle charging active recovery system

11: Charging coupling interface state detection unit

12: Field power state detection unit

13: Charging control unit

14: Switch control loop

100: connection status and charging status

200: Voltage and current status

Claims (10)

An active recovery system for electric vehicle charging, which is installed in an electric vehicle charging device. The active recovery system for electric vehicle charging includes: a charging coupling interface state detection unit, which is used to detect the connection state of the vehicle end coupler and the charging State; the field power state detection unit is used to detect the voltage and current state of the power output of the parking lot end; the charging control unit is connected to the charging coupling interface state detection unit and the field power state detection unit, To receive the detection results from the charging coupling interface state detection unit and the field power state detection unit, so as to generate a charging reset command when the connection state of the vehicle-side coupler is connected but not charging and a switching control loop connected to the charging control unit for receiving a charging reset command from the charging control unit, so as to restore the loop state of the charging coupling interface connected to the vehicle end, so that the charging coupling interface can be used to restore the loop state. reset to reset the state of the connection loop of the vehicle to the unconnected state, and then restart the charging procedure, wherein the charging control unit further includes receiving a reset request from the electric power sharing control system connected to the electric vehicle charging device, so that the The charging coupling interface resets the loop state. The electric vehicle charging active recovery system according to claim 1, wherein the electric vehicle charging device is connected to the field power supply module at the parking lot end through a power connection interface. The electric vehicle charging active recovery system as described in Claim 2 further includes a charging power switch located between the power connection interface and the charging coupling interface to control the power output at the parking lot. The electric vehicle charging active recovery system according to claim 1, wherein the charging coupling interface state detection unit generates a charging detection result according to the connection state and charging state of the vehicle-side coupler, and the field power state detection The unit generates a power supply result according to the voltage and current state of the power output of the parking area terminal, so that the charging control unit generates the charging reset command according to the charging detection result and the power supply result. The electric vehicle charging active recovery system according to claim 1, wherein the charging control unit finds that the power is cut off during the charging process, but the detection results of the charging coupling interface state detection unit and the field power state detection unit When there is no abnormality, the charging control unit is made to generate the charging reset command. The electric vehicle charging active recovery system as described in Claim 1, wherein the recovery request of the power sharing control system is generated by the back-end platform after the vehicle owner reports back to the back-end platform to request the power sharing control system . The electric vehicle charging active recovery system as described in Claim 1, wherein the reset request of the electric power sharing control system is obtained by receiving an error message generated by the vehicle end on the back-end platform and requesting the electric power sharing control system producer. The electric vehicle charging active recovery system as described in Claim 1, wherein the reset request of the power sharing control system refers to the power sharing control system generated by the power sharing control system when it stops charging and allows charging again By. The electric vehicle charging active recovery system as described in claim 1, wherein the recovery request of the electric power sharing control system refers to the electric vehicles caused by the reduction of charging power caused by the restriction of the field power consumption at the end of the parking lot Under interrupted charging, when normal charging is allowed again, it is generated by the power sharing control system. The electric vehicle charging active recovery system as described in Claim 1, wherein the electric power sharing control system further includes making the switching control loop detect the state of the charging coupling interface when receiving the scheduled charging request sent by the back-end platform The unit detects that the coupler of the vehicle end is connected, and keeps the connection circuit state of the vehicle end in an unconnected state, so as to notify the charging control unit to generate a charge start command to make the connection circuit state of the vehicle end when charging is scheduled to start. Enter the connection state.

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