EV Charging Communication for Billing and Charge Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing vehicle-to-grid (V2G) communication standard lacks a defined communication interface for an efficient billing policy and charge schedule, hindering effective energy transfer and billing processes between electric vehicles, supply equipment, and power grids.
Innovation Solution
A communication method and system that enables electric vehicles to transmit charge schedules and energy data to supply equipment and power grid operation servers, allowing for calculation and authorization of charge costs, and facilitating efficient energy transfer and billing through defined communication interfaces and protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing V2G communication standard is used, then basic power transmission is enabled, but no specific communication interface is defined for charge schedule and billing policy
Solution Approach 1:
The communication protocol is segmented into distinct functional layers: a first communication protocol handles basic power transmission between the electric vehicle and supply equipment, while a second communication protocol handles charge schedule and billing policy communications between the electric vehicle and power grid operation server. This segmentation allows each protocol to be optimized for its specific function without unnecessary complexity from the other.
Solution Approach 2:
The power grid operation server acts as an intermediary that receives charge schedule information from the electric vehicle, calculates billing policies, and communicates back to both the electric vehicle and supply equipment. This intermediary enables complex billing and scheduling functions without requiring direct complex communication between the electric vehicle and supply equipment.
2Productivity
If a detailed communication interface for billing policy is implemented, then efficient billing and charge schedule management is achieved, but communication protocol complexity increases
Solution Approach 1:
The communication system is divided into two protocol layers: a simplified first protocol for power transmission control and a specialized second protocol for billing and charge schedule management. This segmentation enables efficient billing operations through the second protocol while keeping the first protocol simple for its dedicated function.
Solution Approach 2:
The power grid operation server serves as a mediator that handles complex billing calculations and charge schedule optimizations, receiving data from the electric vehicle via the second protocol and communicating results back. This intermediary approach enables sophisticated billing efficiency without requiring the electric vehicle or supply equipment to contain complex billing logic.
3Productivity
If charge schedule data is transmitted between electric vehicle and power grid server, then optimized energy management is enabled, but communication overhead increases
Solution Approach 1:
The electric vehicle transmits charge schedule information to the power grid operation server in advance, allowing the server to perform billing calculations and energy management optimizations before the actual charging occurs. This preliminary data exchange enables optimized energy management without causing delays during the charging process itself.
Solution Approach 2:
Communication is segmented into distinct phases: preliminary charge schedule and mileage data transmission for optimization calculations, and separate real-time power transmission control. This segmentation allows optimization computations to occur in advance without adding overhead to the actual energy transfer process.
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 operations of transmitting a message related to the charge schedule including a mileage input by a vehicle user through a human-machine interface and the amount of energy charge calculated according to the mileage to a supply equipment communication controller of the supply equipment and to a power grid communication controller of a power grid operation server via the supply equipment communication controller, receiving a message related to a charge cost calculated according to the charge schedule as a charge cost to be paid to the supply equipment from the supply equipment communication controller, transmitting an authorization message for the charge cost to the supply equipment communication controller, and exchanging a message indicating that charging is ready with the supply equipment communication controller in order to start charging the electric vehicle.