Charging Connector Locking System Failure Detection
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Solution Overview
Problem
Conventional charging connector locking systems inaccurately determine failures in charge controllers and locking devices, often misidentifying simple errors as failures without providing effective solutions.
Innovation Solution
A failure detection method that involves the main controller transmitting initial commands to the locking device, monitoring its execution, and alternately sending lock and unlock commands to determine device status, along with requesting information from the charge controller and sending wake-up signals to assess device functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conventional charging connector locking system determines failure based only on monitoring results without additional operations, then the detection process is simple and quick, but the detection accuracy is low and simple errors are misidentified as failures
Solution Approach 1:
The system performs preliminary diagnostic actions by sending test commands (lock command, unlock command, and information request commands) to the locking device and charge controller before making a failure determination. This preliminary testing allows the system to distinguish between simple errors and actual failures, improving detection accuracy without requiring complex additional hardware.
2Measurement precision
If the system sends multiple test commands and monitors execution results, then the failure detection accuracy improves, but the detection time increases
Solution Approach 1:
The system sends a limited number of test commands (lock command, unlock command, and information request commands) - just enough to reliably determine device status without excessive testing. This partial action approach achieves sufficient detection accuracy while minimizing the time loss compared to continuous or repeated testing protocols.
3Reliability
If the system takes emergency actions like sending unlock commands when failure is detected, then system safety improves, but the complexity of the control system increases
Solution Approach 1:
The system prepares emergency response actions in advance by programming the main controller to automatically execute specific protocols when failures are detected. For example, when a locking device failure is detected, the system automatically sends an unlock command to ensure safety. This beforehand preparation allows the system to respond reliably to failures without requiring complex real-time decision-making circuits.
Data Source
AI summary
A failure detection method in a charging connector locking system includes transmitting, by the main controller, an initial command that is received from the charge controller to the locking device; monitoring, by the main controller, whether the initial command is normally executed by the locking device; and determining, by the main controller, whether a failure occurs in the locking device by monitoring whether the initial command is executed while transmitting, to the locking device, a lock command and an unlock command alternately at predetermined time intervals within a predetermined number of times when the initial command is not normally executed, thereby determining the failure of the locking device with high accuracy.