V2G Charging Interaction for V2G-Disabled Vehicle Compatibility
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Solution Overview
Problem
V2G-enabled charging-discharging devices cannot charge V2G-disabled vehicles, reducing their availability and effectiveness in energy transfer.
Innovation Solution
A method where a charging-discharging device transmits a V2G function confirmation message to a vehicle's battery management system, and upon no feedback within a preset time, it sends an indication to a cloud server that the vehicle is V2G-disabled, allowing the server to instruct the device to perform non-V2G charging, enabling the charging of V2G-disabled vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a V2G-enabled charging-discharging device is used, then the device can support bidirectional energy flow for V2G-enabled vehicles, but it cannot charge V2G-disabled vehicles, reducing device availability
Solution Approach 1:
The charging-discharging device is designed to perform multiple functions: it can detect whether a vehicle is V2G-enabled or V2G-disabled, and automatically switch between V2G mode (bidirectional energy flow) and non-V2G mode (unidirectional charging). This multi-functionality allows a single device type to serve both V2G-enabled and V2G-disabled vehicles, eliminating the need for separate device types and improving device availability.
Solution Approach 2:
The device changes its operational parameters based on the detected vehicle type. When a V2G-enabled vehicle is detected, the device enables bidirectional energy flow with appropriate communication protocols. When a V2G-disabled vehicle is detected, the device switches to unidirectional charging mode with simplified protocols. This parameter adaptation allows the same hardware to efficiently serve different vehicle types.
2Reliability
If V2G communication protocols are strictly enforced, then V2G-enabled vehicles can utilize bidirectional energy flow, but V2G-disabled vehicles are rejected, reducing charging accessibility
Solution Approach 1:
The communication protocol selection is made dynamic rather than static. The device first attempts V2G communication protocols, and if no response is received within a preset time period, it dynamically switches to non-V2G communication protocols. This dynamic adaptation ensures that the device can accommodate both V2G-enabled and V2G-disabled vehicles without compromising the efficiency of V2G transactions when they occur.
3Loss of information
If the device waits for V2G function feedback before charging, then V2G-enabled vehicles can establish proper communication, but V2G-disabled vehicles experience charging delays
Solution Approach 1:
The device performs a preliminary detection action by sending a V2G function confirmation message before initiating the main charging process. This preliminary action allows the device to quickly determine the vehicle type and prepare the appropriate charging mode in advance, minimizing charging initiation time while maintaining communication reliability.
Data Source
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AI summary
The present application discloses a method, a charging-discharging device, a cloud server, a system and a medium for charging-discharging interaction, which belong to the fields of electric power technologies. The method for charging-discharging interaction includes: the charging-discharging device transmits a vehicle-to-grid V2G function confirmation message to a battery management system of a target vehicle; when no V2G function feedback message fed back by the battery management system is received within a preset period of time after transmitting the V2G function confirmation message, the charging-discharging device transmits a first indication message to a cloud server to indicate that the target vehicle is V2G-disabled; in response to a non-V2G charging instruction received from the cloud server, the charging-discharging device performs a non-V2G charging for the target vehicle. The availability of the charging-discharging device can be improved according to embodiments of the present application.