V2G Discharge Communication Interface for Billing Authorization
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Solution Overview
Problem
Current vehicle-to-grid (V2G) technology lacks a defined communication interface for the discharge process, making effective billing policies and efficient energy transfer between electric vehicles and the power grid challenging.
Innovation Solution
A communication method and system are established between electric vehicles, supply equipment, and the power grid, enabling the transmission of discharge schedules, cost calculations, and authorization messages to facilitate efficient energy transfer and billing through an electric vehicle communication controller, a supply equipment communication controller, and a power grid communication controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If V2G technology is implemented without defined communication interfaces, then electric vehicles can be connected to the power grid, but effective billing policies and efficient energy transfer cannot be achieved
Solution Approach 1:
The communication interface is segmented into distinct message types including discharge schedule messages, cost calculation messages, and authorization messages. Each message type handles a specific aspect of the discharge process, allowing for modular implementation and clear definition of communication protocols between EVCC and SECC/PGCC components.
Solution Approach 2:
A standardized communication interface acts as an intermediary layer between the electric vehicle communication controller and the supply equipment/power grid communication controllers. This intermediary protocol enables efficient energy transfer by providing structured methods for exchanging discharge schedules, cost calculations, and authorization information.
2Reliability
If communication interfaces are defined for discharge processes, then effective billing policies can be implemented, but the system complexity increases
Solution Approach 1:
The billing and authorization process is segmented into distinct communication steps: discharge schedule transmission, cost calculation request, cost calculation response, and authorization message exchange. This segmentation ensures reliable billing policy implementation by clearly defining each transaction step while maintaining manageable protocol complexity through modular message structures.
Solution Approach 2:
The communication interface incorporates feedback mechanisms where the supply equipment or power grid calculates discharge costs based on received schedules and returns cost information to the electric vehicle. This feedback loop enables effective billing policies by providing transparent cost calculation and authorization verification processes.
Data Source
AI summary
Disclosed is a method of communicating between an electric vehicle, a supply equipment, and a power grid, which is performed by an electric vehicle communication controller of the electric vehicle, the method including an operation of transmitting a discharge schedule including the amount of energy discharge, a discharge start time, and a discharge finish time to a supply equipment communication controller of the supply equipment or a power grid communication controller of a power grid operation server, receiving a discharge cost calculated according to the discharge schedule from the supply equipment communication controller or the power grid communication controller, and transmitting an authorization message for the discharge cost to the supply equipment communication controller or the power grid communication controller.