EV Charging Communication Polling to Prevent Unintended Time-Outs

The patent implements periodic polling of response messages at predetermined intervals during the time-out period. Instead of waiting passively until the time-out time expires, the communication apparatus actively checks for response messages at regular intervals (e.g., every 100ms). This periodic action detects response messages that arrive late due to communication delays, preventing unintentional time-outs while maintaining relatively simple device architecture through systematic interval-based checking.

The patent dynamically adjusts the polling interval parameter based on the charging state and communication conditions. When the electric vehicle is in a charged state or communication is stable, the polling interval is extended to reduce energy consumption. When the vehicle is in a pre-charging state or communication delays are detected, the polling interval is shortened to improve response detection accuracy. This parameter adaptation balances reliability improvement with energy conservation.

The patent performs preliminary checks during the original time-out period by polling at predetermined intervals before the time-out expires. This preliminary action detects response messages that arrive within the time-out window but were missed due to lack of periodic checking. By proactively polling during the waiting period rather than extending it, the system improves reliability without adding excessive time loss, as the polling occurs within the already-allocated time-out duration.