DC Charging Loop Reconnection Without Re-Authentication
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Solution Overview
Problem
Electric vehicle charging systems require users to re-swipe cards or re-scan QR codes to resume charging after a disconnection, which complicates the charging process and user experience.
Innovation Solution
A direct current charging apparatus with a switch module and direct current voltage conversion module that automatically reconnects the charging loop without user intervention, using a preset direct current voltage to maintain connection and prevent alarm triggers, and adjusts based on battery temperature for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charging loop is disconnected during charging, then user safety is ensured, but the charging process must be restarted requiring user authentication
Solution Approach 1:
The system performs preliminary actions by maintaining the authentication state and charging parameters in memory before disconnection occurs. When the charging loop is reconnected, the system restores the charging process using the pre-saved information, eliminating the need for users to re-authenticate and making the operation simpler while ensuring safety during disconnection.
2Reliability
If the charging loop is disconnected, then safety is improved, but charging efficiency decreases due to restart requirements
Solution Approach 1:
The system implements feedback by continuously monitoring the charging loop status and automatically detecting disconnections. When reconnection occurs, the system uses feedback from stored charging parameters to resume charging immediately without full restart, thereby maintaining safety during disconnection while minimizing efficiency loss through rapid restoration of the charging process.
3Reliability
If authentication is required after reconnection, then charging safety is ensured, but user experience deteriorates
Solution Approach 1:
The system applies self-service by automatically managing the authentication state and charging parameters without requiring user intervention. When the charging loop is reconnected, the system autonomously restores the charging process using pre-saved information, ensuring safety through maintained authentication while eliminating the need for users to re-swipe cards or re-scan QR codes, thereby improving user experience.
Data Source
AI summary
A direct current charging apparatus, a powertrain, and an electric vehicle. The direct current charging apparatus which includes a direct current charging interface, a switch module, and a direct current voltage conversion module is configured to charge power battery of the electric vehicle. The direct current charging interface is configured to connect a positive electrode and a negative electrode of a power supply apparatus and a positive electrode and a negative electrode of the power battery to form a charging loop. The switch module is configured to connect or disconnect the charging loop. The direct current voltage conversion module is configured to output a preset direct current voltage to the positive electrode and the negative electrode of the power supply apparatus. When the charging loop between the power battery and a charging pile is connected again, charging can be resumed without re-swiping card/re-scanning QR code.