EV Charging Restart Control via CP Line Wake-Up Sequences
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Solution Overview
Problem
Electric vehicle charging interruptions require users to manually reconnect the charger, leading to inefficiencies and user inconvenience due to the need for constant monitoring and reconnection.
Innovation Solution
A charging system with a control pilot line, sensing unit, and control unit that automatically determines the charging environment and performs wake-up sequences to resume charging without user intervention, using Pulse Width Modulation (PWM) charging and voltage sensing to assess connection status and complete charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual reconnection is required after charging interruption, then user control over charging process is maintained, but user convenience deteriorates and time loss increases
Solution Approach 1:
The charging system performs self-diagnosis and automatic reconnection after interruption. The control unit detects charging status through the CP line voltage, determines interruption causes, and automatically re-establishes connection without requiring user intervention, allowing the system to serve itself.
Solution Approach 2:
The system continuously monitors CP line voltage to detect charging status changes. When voltage indicates interruption, the control unit receives feedback about the charging environment, analyzes the cause, and adjusts its response accordingly, creating a closed-loop control system that responds to real-time conditions.
2Productivity
If automatic restart function is implemented, then productivity improves by resuming charging automatically, but device complexity increases due to additional sensing and control units
Solution Approach 1:
The existing CP line in the charging system is made multi-functional. It not only provides charging control signals but also serves as a sensing channel for detecting charging status and interruption causes. This eliminates the need for separate sensing hardware, reducing system complexity while enabling automatic restart functionality.
Solution Approach 2:
The control unit acts as an intermediary that processes information from the CP line voltage sensing and coordinates the automatic reconnection process. It mediates between the sensing function and the charging control function, integrating multiple operations through a single control element.
3Reliability
If continuous monitoring of charging status is performed, then reliability of charging resumption improves, but energy consumption increases
Solution Approach 1:
Instead of continuous monitoring, the system performs periodic detection of CP line voltage at critical moments (when charging interruption is detected). The control unit samples voltage to determine charging status and causes interruption, then acts accordingly. This periodic sampling approach maintains reliability while significantly reducing energy consumption compared to continuous monitoring.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables automatic resumption of charging without user reconnection, enhancing efficiency and convenience by transmitting charging status information for appropriate user actions.
Implementation Method 1
a sensing unit which is installed on the charger side and senses voltage of the CP line
Implementation Method 2
charges the electric vehicle by Pulse Width Modulation (PWM) charging method
Data Source
AI summary
The present disclosure relates to a charging system including a charge restart function of an electric vehicle, including a CP line which is installed on a charger side and is connected to an electric vehicle and charges the electric vehicle by Pulse Width Modulation (PWM) charging method, a sensing unit which is installed on the charger side and senses voltage of the CP line, and a control unit which is installed on the charger side and determines charging environment of the electric vehicle according to sensed voltage of the CP line from the sensing unit, and performs a predetermined number of wake-up sequences on the electric vehicle according to the determined charging environment.