EV Controller Message Filtering for Crosstalk
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Solution Overview
Problem
In electric vehicle charging, message crosstalk between multiple EVSEs and vehicles in close proximity can lead to communication errors and association procedure failures, preventing vehicles from charging reliably.
Innovation Solution
A vehicle controller filters out messages that are not of the correct message acceptance type or received outside the specified time window during the association procedure, reducing crosstalk-related faults by implementing a sequencing filter to ensure only valid responses are processed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If message filtering by acceptance type and time window is implemented, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The controller pre-configures message acceptance types and time windows before the association procedure begins. By establishing these filtering criteria in advance, the controller can efficiently reject invalid messages without complex real-time analysis, thereby improving communication reliability while maintaining manageable device complexity
Solution Approach 2:
The message filtering function is segmented into distinct components: message type validation and time window validation. This segmentation allows the controller to handle each validation aspect independently through separate logical checks, making the overall system more manageable and easier to implement despite the increased complexity
2Reliability
If strict message filtering is applied during association procedure, then association success rate is improved, but processing time increases
Solution Approach 1:
The controller applies partial filtering by focusing only on the most critical validation aspects (message acceptance type and time window) rather than performing exhaustive validation of all message attributes. This partial action approach ensures sufficient filtering to improve association success rate while avoiding excessive processing time that would result from comprehensive validation
Data Source
AI summary
A vehicle controller of a vehicle may set a message acceptance type and a time window for response according to a type of association procedure message received from a requester, provide the association procedure message to electric vehicle supply equipment, and return a received response message to the requester when the response message is of the acceptance type and received within the time window, and otherwise reject the response message.