EV Power Transmission Interface for V2G Billing Authorization

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Solution Overview

Problem

Existing V2G technologies lack defined communication interfaces for effective billing policies during energy discharge processes between electric vehicles and power grids.

Innovation Solution

A communication method is established between electric vehicles, supply equipment, and power grid systems, involving electric vehicle communication controllers, supply equipment communication controllers, and power grid communication controllers, to facilitate the transmission of discharge schedules, costs, and authorization messages, with a power transmission system including a human-machine interface, on-board charger, and electric vehicle communication controller to manage energy transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If V2G technology connects electric vehicles to power grids, then energy discharge capability is improved, but communication interface definition for billing is insufficient

Engineering Contradiction:

Improveenergy discharge capabilityVSAvoidcommunication interface definition

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent introduces a standardized communication interface as an intermediary layer between the electric vehicle and power grid systems. This interface includes defined message formats, data elements, and protocols that mediate the information exchange required for billing purposes, thereby resolving the information loss problem while preserving energy discharge capability

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The communication interface is segmented into distinct functional components including message structures, data elements, and transmission protocols. This segmentation allows each component to be independently defined and optimized for specific billing-related functions, ensuring comprehensive information capture without compromising overall system versatility

Inventive Principle:

Principle #1Segmentation

2Reliability

If communication interfaces are defined for billing, then billing effectiveness is improved, but system complexity increases

Engineering Contradiction:

Improvebilling effectivenessVSAvoidcommunication interface structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The communication interface is designed with universal message structures and standardized data elements that can serve multiple functions including billing, monitoring, and control. This multi-functionality approach ensures billing effectiveness while avoiding the need for separate specialized interfaces, thereby limiting complexity increase

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent employs standardized parameter definitions and fixed message formats that can be configured through parameter settings rather than structural changes. This allows billing effectiveness to be improved through parameter customization while maintaining a consistent underlying interface structure, thus limiting complexity

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12570177B2Communication method between electric vehicle, supply equipment and power grid operation server and power transmission device embedded in electric vehicle

Publication Date: 2026.03.10 HYUNDAI MOBIS CO LTD

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.