Wireless EV Charging Power Quality Alert System
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Solution Overview
Problem
Delayed charging for electric vehicles using wireless systems often fails due to misalignment, foreign object intrusion, and faulty grid power, leading to unsuccessful charging sessions.
Innovation Solution
Implementing a wireless power quality check and foreign object detection before the scheduled charge time, with periodic checks, to alert users of any issues, ensuring sufficient grid and wireless power quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If delayed charging is implemented using wireless systems, then cost savings are achieved by charging at off-peak hours, but charging sessions may fail due to misalignment, foreign object intrusion, and faulty grid power
Solution Approach 1:
The system performs power quality checks and foreign object detection before the scheduled charging session begins. This preliminary verification ensures that charging conditions are appropriate before committing to a delayed charge session, preventing failed sessions due to misalignment, foreign objects, or power quality issues.
Solution Approach 2:
The system continuously monitors power quality parameters and foreign object presence during the delayed charging window, and provides feedback to notify users of any issues. This feedback mechanism allows users to be alerted before leaving the vehicle if problems are detected, enabling them to take corrective action.
2Reliability
If power quality checks and foreign object detection are performed before scheduled charge time, then charging reliability is improved, but system complexity and monitoring requirements increase
Solution Approach 1:
The wireless charging system performs self-diagnosis by automatically checking power quality parameters and detecting foreign objects without requiring manual intervention. The system monitors its own operating conditions and notifies users of issues, reducing the need for complex external monitoring infrastructure.
Solution Approach 2:
The monitoring system is integrated into the existing wireless charging infrastructure, allowing the same hardware to serve multiple functions: wireless power transfer, power quality monitoring, and foreign object detection. This multi-functionality reduces overall system complexity compared to having separate dedicated monitoring systems.
3Reliability
If continuous monitoring is performed until charge time, then charging success is improved, but energy consumption and system resource usage increase
Solution Approach 1:
Instead of continuous monitoring, the system performs power quality checks and foreign object detection at periodic intervals during the delayed charging window. This approach maintains adequate monitoring coverage to detect issues while reducing energy consumption and computational resource usage 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
Enhances the reliability of delayed charging by preventing unsuccessful sessions, allowing users to address power quality issues before leaving the vehicle, thus improving the acceptance and efficiency of wireless charging technology.
Implementation Method 1
When attempting to perform a delayed charge with a wireless system
Data Source
AI summary
A delayed charging system for a vehicle implements an energy transfer efficiency check prior to the scheduled charge time to confirm sufficient grid power quality and wireless power quality. In addition to this, a foreign object check is performed prior to the scheduled charge. These checks are performed immediately after the customer sets up the delayed session as well as at specified intervals after that. If a power quality issue is detected, the customer will be alerted so they can remedy the situation.