EV Charging Profile Expiration for Offline Load Control
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Solution Overview
Problem
Cloud-based load management systems for electric vehicle charging stations are vulnerable to internet connection losses, leading to uncontrolled charging loads and potential over-currents when a station goes offline.
Innovation Solution
Implementing a charging configuration at the station that expires after a defined period, with a default profile set to minimum or zero power, and regularly resending charging profiles to ensure timely updates and prevent uncontrolled charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If cloud-based load management is implemented at the charging station, then charging load control capability is improved, but system reliability deteriorates due to vulnerability to internet connection loss
Solution Approach 1:
The charging profile includes a predefined expiration time that is set in advance before the charging session begins. This preliminary action ensures that if the charging station loses internet connection, the profile will automatically expire and trigger a fallback to default charging parameters, maintaining reliability without sacrificing automation capability
Solution Approach 2:
The system prepares compensatory measures in advance by defining expiration times and fallback default profiles. When internet connection is lost, these pre-prepared cushioning mechanisms activate automatically to prevent uncontrolled charging, thus protecting against the harmful effect of connection loss while maintaining the benefits of automated load management
2Reliability
If charging profile expiration is implemented, then system reliability is improved by preventing uncontrolled charging, but charging session continuity may deteriorate due to potential interruptions
Solution Approach 1:
The system continuously monitors whether the charging station remains connected to the internet. When connected, it refreshes the charging profile before expiration, creating a feedback loop that prevents unintended profile expiration and maintains charging continuity while still providing the reliability benefit of expiration-based safety mechanisms
Data Source
AI summary
Various example embodiments relate to load management of an electric vehicle charging station. A computer-implemented method may comprise receiving a notification of an event related to a charging session at a charging station the charging station; determining a charging profile for the charging station based on the available charging current at the charging station; sending the charging profile to the charging station, wherein the charging profile is configured to expire after a predefined amount of time.