Electric Vehicle Charging Communication via SAE J2947
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Solution Overview
Problem
Existing electric vehicle charging systems lack adaptive demand management, leading to inefficiencies in electricity usage and potential CO2 emissions due to mismatched demand and supply, necessitating improved communication between users, electric vehicles, and power supply facilities.
Innovation Solution
An operating method for electric vehicles that includes charging the battery, monitoring the charging state, and transmitting real-time charging information to user terminal devices, enabling adaptive demand management through various communication protocols such as Zigbee, Wi-Fi, and PLC, facilitating communication between electric vehicles, power supply devices, and user terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery charging is performed without real-time information exchange, then charging process is simple, but electricity demand management is inefficient and CO2 emissions increase
Solution Approach 1:
The patent implements a universal communication protocol (SAE J2947) that enables multiple types of devices (electric vehicles, charging stations, power supply facilities, user terminals) to exchange information through a common standard. This multi-functional communication system allows a single protocol to handle diverse communication needs across different device types, improving electricity demand management efficiency without requiring separate specialized systems for each device category.
Solution Approach 2:
The patent introduces an intermediary communication framework that mediates information exchange between electric vehicles, charging stations, power supply facilities, and user terminals. This intermediary system processes and standardizes communication protocols, enabling efficient coordination of electricity demand and supply while reducing the complexity that would arise from direct peer-to-peer communication between all device pairs.
2Adaptability or versatility
If real-time charging information is transmitted to user terminals, then adaptive demand management is achieved, but communication requirements and system complexity increase
Solution Approach 1:
The patent utilizes parameter changes in communication protocols to enable adaptive demand management. By dynamically adjusting communication parameters such as data transmission frequency, information content, and protocol selection based on charging state and demand conditions, the system achieves adaptability without requiring fundamentally complex communication infrastructure. The SAE J2947 protocol allows parameter variations to accommodate different operational scenarios.
Solution Approach 2:
The patent implements feedback mechanisms where charging information is continuously transmitted from electric vehicles to user terminals in real-time. This feedback loop enables users to monitor charging status and make informed decisions about electricity consumption patterns, achieving adaptive demand management. The systematic feedback structure standardized by SAE J2947 reduces communication complexity by providing a predictable information flow pattern.
3Adaptability or versatility
If multiple communication protocols are supported for information exchange, then communication flexibility is improved, but device complexity increases
Solution Approach 1:
The patent adopts the SAE J2947 universal communication protocol that enables a single transceiver system to communicate with multiple types of devices (electric vehicles, charging stations, power supply facilities, user terminals) through one standardized interface. This multi-functional protocol eliminates the need for separate specialized communication systems for each device type, maintaining communication flexibility while reducing overall system complexity.
Data Source
AI summary
An electric vehicle charges a battery through an electric vehicle power supply apparatus, and periodically checks a current charged state of the battery during a charging operation. During the charging operation, the electric vehicle transmits to a user terminal a first charging information notifying message including information on a current charged state of the battery. When the completion of charging of the battery is detected, the electric vehicle transmits to the user terminal a second charging information notifying message providing notification of the completion of charging of the battery.