Charging station electric vehicle resource V2V management method and system for emergency scene

Abstract

The invention relates to an emergency scene-oriented charging station electric vehicle resource V2V management method and system, and the core of the method is that an original charging station management state is maintained when a power grid is normal, and a feedback receiving module transmits pre-stored electric vehicle SOC, charging duration and other information to a wake-up signal generation module after offline; the module activates the standby energy storage module to establish communication voltage for the direct current bus according to a pre-stored high / low SOC threshold value, and awakens the charging and discharging vehicle and the charging pile which meet conditions; and a charging and discharging path is constructed through the direct current bus and the auxiliary power supply, the high-SOC electric vehicle emergently charges the low-SOC electric vehicle through the direct current bus, and after the V2V mode is started, the standby energy storage module stops supplying power. According to the method, manual intervention is not needed, electric vehicle energy storage resources in the station are efficiently dispatched, emergency charging of low-electric-quantity vehicles is rapidly achieved, the fault self-adaption toughness of the V2V charging pile is improved, and energy waste and safety risks are avoided.

Description

Technical Field

[0001] This invention relates to the field of power resource dispatching and emergency power supply guarantee, and in particular to a V2V management method and system for electric vehicle resources in charging stations for emergency scenarios. Background Technology

[0002] With the popularization of green energy, the concept of low-carbon travel has taken root in people's hearts. In recent years, the domestic electric vehicle market has experienced rapid growth, and charging infrastructure has been widely deployed, making charging stations an important node in the distributed energy system. However, when uncontrollable factors such as natural disasters, regional power outages, local grid maintenance, or equipment failures cause the DC bus of a charging station to disconnect from the grid and lose power, the charging piles that originally relied on grid power supply cannot function properly. This results in: the DC bus disconnection causing the charging piles to lose power, thus the electric vehicle energy within the station cannot be redistributed; high-SOC electric vehicle energy storage resources cannot be efficiently utilized, while low-SOC electric vehicles are insufficient to support their journey to other charging stations for emergency charging; and the station's equipment cannot autonomously restore communication and energy management functions after a power outage. This leads to significant casualties and a waste of electrical energy.

[0003] Traditional solutions, such as emergency diesel generators or external energy storage devices, have significant drawbacks in emergency power restoration. For example, they may interrupt the communication connection between the charging station and the electric vehicle, requiring the charging station system to be restarted, resulting in a poor user experience and even potential safety risks. These solutions also suffer from high deployment costs, long deployment times, difficulties in deployment during emergencies, slow response times, and maintenance difficulties.

[0004] Therefore, how to utilize the existing high SOC on-board energy storage resources of electric vehicles within the charging station to achieve self-organized wake-up and energy dispatch of the entire V2V charging pile in an offline state has become a key technical issue for improving emergency power supply capabilities, V2V charging pile fault adaptive resilience, and fully dispatching power resources to ensure the safety of personnel and property. Summary of the Invention

[0005] The purpose of this application is to provide a V2V management method and system for electric vehicle resources in charging stations for emergency scenarios, which can fully utilize the power resources of high SOC electric vehicles and provide emergency charging for low SOC electric vehicles without calling up human resources.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] Firstly, embodiments of this application provide a V2V management method for electric vehicle resources in charging stations for emergency scenarios, the specific steps of which are as follows:

[0008] Step 1: The status information of the grid-side power grid is received in real time by the feedback receiving and status recording module. This module judges the working status of the power grid. When the grid is detected to be working normally, the V2V charging station maintains its original working status. When the grid is detected to be disconnected from the grid, Step 2 is performed.

[0009] Step 2: The feedback receiving and status recording module obtains the status of all electric vehicle SOCs before disconnection and feeds back the recorded electric vehicle SOC status to the wake-up signal generation module.

[0010] Step 3: After the wake-up signal generation module receives the information on the grid-side status fault and the SOC status of the electric vehicle, it analyzes and integrates the information fed back by the feedback receiving and status recording modules. This module has high / low SOC thresholds and has the function of sending control signals to the backup energy storage module. When the SOC of some electric vehicles reaches the set high / low threshold SOC and charging / discharging conditions, the module sends a vehicle wake-up signal to the charging / discharging electric vehicle. At the same time, the module sends a backup energy storage wake-up signal, i.e., a discharge control signal, to the backup energy storage module. At this time, the backup energy storage module is woken up. The wake-up signal generation module provides low-power power to the DC bus to establish the required communication voltage for the DC bus.

[0011] Step 4: After the wake-up signal generation module wakes up the discharge vehicle and its connected charging pile, the discharge vehicle establishes voltage on the DC bus through the charging pile and supplies power to the DC bus for no less than 1 minute. Finally, a stable 600V DC bus voltage is established, and then the DC bus supplies power to the auxiliary power supply inside the charging and discharging pile of the charging and discharging vehicle.

[0012] Step 5: After the auxiliary power supply module of the charging and discharging pile is activated, it provides auxiliary power to the corresponding connected charging and discharging vehicles. The function of the auxiliary power supply is to activate the discharging resources of the discharging vehicle and the charging resources of the charging vehicle, in order to prepare for emergency charging of low SOC electric vehicles.

[0013] Step Six: The high-threshold SOC electric vehicle and its connected discharge pile charge the low-threshold SOC electric vehicle and its connected charging pile through the DC bus. The low-threshold SOC electric vehicle enters the charging state, and the status is fed back to the feedback receiving and status recording module inside the bus terminal. The charging dynamic information received by the feedback receiving and status recording module is then fed back to the wake-up signal generation module. The feedback receiving and status recording module is powered by the regulated DC bus. Finally, the feedback receiving and status recording module determines whether the V2V mode has been started. If it has been successfully started, the wake-up signal generation module sends a stop power supply signal to the backup energy storage module. After receiving this signal, the backup energy storage module stops supplying low power to the DC bus. If the V2V mode has not been started, the wake-up mode continues to be maintained.

[0014] Step 7: After the feedback receiving and status recording module successfully determines the V2V mode start status, it will choose whether to maintain the wake-up mode or end the wake-up mode and jump to step 3 to select whether to maintain the wake-up process or send a power failure signal to the backup energy storage module.

[0015] The feedback receiving and status recording module obtains the status of all electric vehicle SOCs before the network outage, including charging time and the real-time specific location of the electric vehicle.

[0016] The wake-up signal generation module sends a switch closing signal according to the selected charging / discharging vehicle, closing the path between the DC bus and the charging pile. After the DC bus voltage helps the charging pile establish a communication voltage, the DC bus charges the auxiliary power supply inside the selected electric vehicle charging pile, thereby waking up the charging pile. Then, the auxiliary power supply transmits a signal to the electric vehicle wake-up port, finally completing the final wake-up of the charging / discharging vehicle.

[0017] Secondly, this application provides a V2V (Vehicle-to-Vehicle) resource management system for charging stations in emergency scenarios, including a charging station input meter, a V2V mode control module, and a V2V charging pile. The V2V mode control module includes a feedback receiving and status recording module, a backup energy storage module, and a wake-up signal generation module. The V2V charging pile contains n charging piles and their connected electric vehicles. The feedback receiving and status recording module detects the DC bus voltage signal of the charging station input meter in real time. When the detected voltage signal suddenly drops to 0, the charging station input meter is disconnected from the grid. The feedback receiving and status recording module sends the electric vehicle SOC (State of Charge) status information signal to the wake-up signal generation module. The wake-up signal generation module provides charging stations with sufficient SOC based on the set high / low SOC thresholds. When an electric vehicle is in a discharge condition, it sends a high / low SOC vehicle wake-up signal. Simultaneously, the wake-up signal generation module sends a power supply signal to the backup energy storage module, waking it up. The backup energy storage module establishes a communication voltage for the DC bus. When the discharge vehicle and its connected charging pile are awakened, the discharge vehicle establishes a stable DC voltage for the DC bus, waking it up. The DC bus then supplies power to the auxiliary power supply module of the charging and discharging pile, waking it up. The auxiliary power supply sends a wake-up signal to the charging and discharging vehicle and its charging pile to wake up the charging and discharging resources. At the same time, the discharge vehicle indirectly charges low SOC vehicles and their charging piles through the DC bus, thus completing the communication wake-up of the charging and discharging resources of the electric vehicle that meets the charging and discharging conditions and the emergency charging of low SOC vehicles.

[0018] Compared with existing technologies, this invention has significant advantages. It enables the full scheduling and efficient utilization of the power resources stored inside high-SOC electric vehicles, facilitating emergency charging of low-SOC electric vehicles. Through V2V mode activation, it not only enables charging of low-SOC electric vehicles without requiring human resources, but also improves the fault-adaptive resilience and power resource utilization efficiency of the entire V2V charging pile. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a system block diagram of the present invention;

[0021] Figure 2 This is a flowchart of the method of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] The terms “first,” “second,” etc., are used only to distinguish one entity or operation from another, and should not be construed as indicating or implying relative importance, nor as requiring or implying any such actual relationship or order between these entities or operations.

[0025] like Figure 1 and Figure 2As shown, this embodiment is achieved through the following technical solution. The purpose of this invention is to overcome the problems of poor flexibility, difficult maintenance, difficult deployment, and slow response speed of traditional emergency diesel generator power supply systems. This invention provides a method for activating electric vehicle resources, V2V mode activation, and power resource scheduling and guarantee in emergency scenarios. The key core lies in the V2V mode control module deployed at the DC bus terminal. This module integrates a feedback receiving and status recording module, a backup energy storage module, and a wake-up signal generation module. The V2V mode control module, which integrates these three modules, can fully utilize the power resources of high SOC electric vehicles and provide emergency charging for low SOC electric vehicles without requiring manpower.

[0026] Firstly, the feedback receiving and status recording module can record the real-time charging time and SOC information of each electric vehicle charging under the V2V charging pile before the grid disconnection. After the grid disconnection, the DC bus is disconnected. The feedback receiving and status recording module senses and receives the grid disconnection information, and sends the charging status of electric vehicles with high and low threshold SOCs received before the grid disconnection to the wake-up signal generation module. This module feeds back the electric vehicle charging time and real-time status received before the grid disconnection to the wake-up signal generation module for analysis and synthesis.

[0027] Secondly, the wake-up signal generation module can determine whether the on-board energy storage resources of the electric vehicle meet the requirements of the high and low SOC values ​​based on the electric vehicle's status feedback and the internally set high and low SOC values. It also identifies electric vehicles that can be used for reverse power supply from the DC bus and, through internal algorithm scheduling, obtains the location of the corresponding high-sOC electric vehicle and the corresponding switch number of the connected charging pile. Similarly, through internal algorithm, it determines the charging sequence, charging method, location of the low-sOC electric vehicle requiring emergency charging, and the switch number of the connected charging pile. After obtaining the charging and discharging information of the corresponding electric vehicles through algorithm scheduling, the wake-up signal generation module sends a discharge control signal to the backup energy storage module.

[0028] The backup energy storage module provides low-power power to the DC bus. This backup energy storage module is a low-power module, and the released energy can meet the power supply requirements for short-term communication and wake-up. At the same time, the wake-up signal generation module can send a closing signal of the corresponding relay switch between the electric vehicle charging pile and the high-voltage DC bus according to the switch number of the charging electric vehicle, thus establishing a charging and discharging path between the charging pile and the DC bus.

[0029] Simultaneously, the DC bus charges the auxiliary power supply inside the charging piles connected to electric vehicles with corresponding high and low threshold SOCs. The auxiliary power supply provides power to the low-voltage wake-up port of the charging pile connected to the high-threshold SOC electric vehicle, and also to the low-voltage communication wake-up port of the on-board energy storage device inside the high-threshold SOC electric vehicle that needs to discharge. This wakes up the internal energy storage resources of the discharging high-threshold SOC electric vehicle and the connected charging pile, enabling it to discharge to the DC bus through the charging pile. Similarly, the auxiliary power supply provides power to the low-voltage wake-up port of the charging pile connected to the low-threshold SOC electric vehicle, and also to the low-voltage communication wake-up port of the on-board energy storage device inside the low-threshold SOC electric vehicle that needs to be charged. This wakes up the internal energy storage resources of the charging low-threshold SOC electric vehicle and the connected charging pile, allowing the power released from the high-threshold SOC to charge the on-board energy storage device of the low-threshold SOC electric vehicle through the charging pile and the DC bus, preparing for charging and discharging.

[0030] The last electric vehicle to discharge establishes a stable DC bus voltage by discharging into the DC bus, while simultaneously supplying power to vehicles requiring emergency charging and their charging stations, thus initiating the V2V mode. At the same time, the wake-up signal generation module sends a stop-supply signal to the backup energy storage module, which then ceases its low-power supply to the DC bus.

[0031] This process enables the full scheduling and efficient utilization of the power resources stored inside high-SOC electric vehicles, facilitating emergency charging of low-SOC electric vehicles. By activating the V2V mode, charging of low-SOC electric vehicles can be achieved without requiring human resources, and the fault-adaptive resilience and power resource utilization efficiency of the entire V2V charging pile are also improved.

[0032] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A V2V management method for electric vehicle resources in charging stations for emergency scenarios, characterized in that: The specific steps are as follows: Step 1: The status information of the grid-side power grid is received in real time by the feedback receiving and status recording module. This module judges the working status of the power grid. When the grid is detected to be working normally, the V2V charging station maintains its original working status. When the grid is detected to be disconnected from the grid, Step 2 is performed. Step 2: The feedback receiving and status recording module obtains the status of all electric vehicle SOCs before disconnection and feeds back the recorded electric vehicle SOC status to the wake-up signal generation module. Step 3: After the wake-up signal generation module receives the information on the grid-side status fault and the SOC status of the electric vehicle, it analyzes and integrates the information fed back by the feedback receiving and status recording modules. This module has high / low SOC thresholds and has the function of sending control signals to the backup energy storage module. When the SOC of some electric vehicles reaches the set high / low threshold SOC and charging / discharging conditions, the module sends a vehicle wake-up signal to the charging / discharging electric vehicle. At the same time, the module sends a backup energy storage wake-up signal, i.e., a discharge control signal, to the backup energy storage module. At this time, the backup energy storage module is woken up. The wake-up signal generation module provides low-power power to the DC bus to establish the required communication voltage for the DC bus. Step 4: After the wake-up signal generation module wakes up the discharge vehicle and its connected charging pile, the discharge vehicle establishes voltage on the DC bus through the charging pile and supplies power to the DC bus for no less than 1 minute. Finally, a stable 600V DC bus voltage is established, and then the DC bus supplies power to the auxiliary power supply inside the charging and discharging pile of the charging and discharging vehicle. Step 5: After the auxiliary power supply module of the charging and discharging pile is activated, it provides auxiliary power to the corresponding connected charging and discharging vehicles. The function of the auxiliary power supply is to activate the discharging resources of the discharging vehicle and the charging resources of the charging vehicle, in order to prepare for emergency charging of low SOC electric vehicles. Step Six: The high-threshold SOC electric vehicle and its connected discharge pile charge the low-threshold SOC electric vehicle and its connected charging pile through the DC bus. The low-threshold SOC electric vehicle enters the charging state, and the status is fed back to the feedback receiving and status recording module inside the bus terminal. The charging dynamic information received by the feedback receiving and status recording module is then fed back to the wake-up signal generation module. The feedback receiving and status recording module is powered by the regulated DC bus. Finally, the feedback receiving and status recording module determines whether the V2V mode has been started. If it has been successfully started, the wake-up signal generation module sends a stop power supply signal to the backup energy storage module. After receiving this signal, the backup energy storage module stops supplying low power to the DC bus. If the V2V mode has not been started, the wake-up mode continues to be maintained. Step 7: After the feedback receiving and status recording module successfully determines the V2V mode start status, it will choose whether to maintain the wake-up mode or end the wake-up mode and jump to step 3 to select whether to maintain the wake-up process or send a power failure signal to the backup energy storage module.

2. The V2V management method for electric vehicle resources in charging stations for emergency scenarios according to claim 1, characterized in that: The feedback receiving and status recording module obtains the status of all electric vehicle SOCs before the network outage, including charging time and the real-time specific location of the electric vehicle.

3. The V2V management method for electric vehicle resources in charging stations for emergency scenarios according to claim 1, characterized in that: The wake-up signal generation module sends a switch closing signal according to the selected charging / discharging vehicle, closing the path between the DC bus and the charging pile. After the DC bus voltage helps the charging pile establish a communication voltage, the DC bus charges the auxiliary power supply inside the selected electric vehicle charging pile, thereby waking up the charging pile. Then, the auxiliary power supply transmits a signal to the electric vehicle wake-up port, finally completing the final wake-up of the charging / discharging vehicle.

4. A V2V management system for electric vehicle resources in charging stations for emergency scenarios, characterized in that: The system includes a charging station input meter, a V2V mode control module, and a V2V charging pile. The V2V mode control module includes a feedback receiving and status recording module, a backup energy storage module, and a wake-up signal generation module. The V2V charging pile contains n charging piles and their connected electric vehicles. The feedback receiving and status recording module monitors the DC bus voltage signal of the charging station input meter in real time. When the detected voltage signal suddenly drops to 0, the charging station input meter is disconnected from the grid. The feedback receiving and status recording module sends the electric vehicle SOC status information signal to the wake-up signal generation module. The wake-up signal generation module sends high / low SOC vehicle status signals to electric vehicles that meet the charging and discharging conditions according to the set high / low SOC thresholds. A wake-up signal is generated, and the wake-up signal generation module sends a power supply signal to the backup energy storage module, waking it up. The backup energy storage module establishes a communication voltage for the DC bus. When the discharging vehicle and its connected charging pile are woken up, the discharging vehicle establishes a stable DC voltage for the DC bus, waking up the DC bus. The DC bus then supplies power to the auxiliary power supply module of the charging and discharging pile, waking up the auxiliary power supply. The auxiliary power supply sends a wake-up signal to the charging and discharging vehicle and its charging pile to wake up the charging and discharging resources. At the same time, the discharging vehicle indirectly charges the low SOC vehicle and its charging pile through the DC bus, thereby completing the communication wake-up of the electric vehicle charging and discharging resources that meet the charging and discharging conditions and the emergency charging of the low SOC vehicle.

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