EV Charging Pilot Signal Modulation for Fast Demand Response
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Solution Overview
Problem
Existing demand response technologies for electric vehicles are complex due to differing communication protocols and standards, leading to integration difficulties, communication delays, and inability to respond quickly, especially for vehicles not supporting V2G functions.
Innovation Solution
A control circuit for electric vehicles that includes an on-board diagnostic to receive demand response signals directly from a distributed energy resource management system, a charging device, and a charge reference change circuit to modulate pilot signals based on these signals, simplifying communication and enabling quick response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional demand response protocols are used with multiple communication hubs, then system integration is attempted, but communication delays occur and response speed decreases
Solution Approach 1:
The patent extracts and eliminates intermediate communication hubs from the communication path between EVs and DERMS. By implementing direct communication using standardized open protocols (OCPP, ISO 15118, SAE J2978), the system removes unnecessary relay points that cause communication delays, thereby improving response speed while maintaining system integration capability.
Solution Approach 2:
The patent introduces standardized communication protocols as intermediaries that enable direct communication between diverse systems. These protocols act as universal mediators that allow different EV models and DERMS to communicate directly without requiring multiple hub intermediaries, thus reducing communication delays while maintaining adaptability.
2Adaptability or versatility
If different communication protocols are used for each market, then local requirements are met, but system integration becomes difficult
Solution Approach 1:
The patent implements universal communication protocols that can function across multiple markets and applications. By adopting standardized protocols (OCPP, ISO 15118, SAE J2978) that are designed to work with different EV models and DERMS systems, the solution achieves broad compatibility without requiring separate protocol implementations for each market, thereby reducing integration complexity.
Solution Approach 2:
The patent changes the communication parameter from proprietary/market-specific protocols to standardized open protocols. This parameter change enables systems to maintain adaptability to local requirements while using a unified communication standard, significantly reducing the complexity of integrating different systems across various markets.
3Reliability
If standardized protocols are not implemented, then existing systems can operate independently, but communication efficiency and response time deteriorate
Solution Approach 1:
The patent merges previously separate communication paths into a direct communication channel between EVs and DERMS. By combining the functions of multiple communication hubs into a single direct link using standardized protocols, the system maintains reliability through direct connection while eliminating the time losses associated with multiple relay communications.
Data Source
AI summary
The present disclosure relates to a system for respond to a demand response, a control circuit for electric vehicles, and a method for driving the same capable of efficiently responding to a demand response. The system includes an on board diagnostic configured to receive a demand response signal directly from a distributed energy resource management system and output a command signal according to the demand response signal from the distributed energy resource management system, a charging device configured to charge a battery of an electric vehicle, and a charge reference change circuit configured to modulate a pilot signal supplied from a charging equipment to the charging device according to a command signal from the on board diagnostic.