EV Wireless Charging Controller Frequency Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless charging systems for electric vehicles face challenges in efficiently restarting power transmission after a foreign object is removed, leading to unnecessary power consumption and potential exhaustion of the vehicle's battery due to frequent inquiries about the object's presence.
Innovation Solution
The electric vehicle is equipped with a controller that includes a determination processor and a frequency control unit, which determines whether power transmission can be restarted after a foreign object is removed by adjusting the frequency of inquiries based on the remaining battery power, user requests, and object type, allowing for optimized power management and reduced consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle frequently inquires about foreign object presence to enable swift restart of power transmission, then the restart speed is improved, but the power consumption increases and may exhaust the battery
Solution Approach 1:
The determination frequency is made dynamically adjustable rather than fixed. The frequency control unit changes the determination frequency based on battery remaining power levels, allowing the system to adapt between high-frequency determination (when battery is charged) and low-frequency determination (when battery is low on power), thus resolving the contradiction between restart speed and power consumption
Solution Approach 2:
The system changes the parameter of determination frequency based on battery power levels. When battery remaining power is high, the determination frequency is set to a first (higher) value for swift restart capability. When battery remaining power is low, the determination frequency is set to a second (lower) value to conserve power, directly addressing the contradiction through parameter adjustment
2Reliability
If the vehicle continuously monitors for foreign objects to ensure safety, then the reliability is improved, but the power consumption increases
Solution Approach 1:
Instead of continuous monitoring, the system performs periodic determination at adjusted frequencies based on battery power levels. The determination is made at intervals rather than continuously, reducing power consumption while maintaining safety monitoring capability through periodic checks
Solution Approach 2:
The monitoring frequency is dynamically adjusted based on battery power levels. When power is abundant, monitoring occurs more frequently for enhanced reliability. When power is scarce, monitoring frequency decreases to conserve energy, maintaining an acceptable balance between reliability and power consumption
3Reliability
If the system waits for foreign object removal before restarting power transmission, then the safety is improved, but the productivity decreases due to longer downtime
Solution Approach 1:
The system performs preliminary determination at adjusted frequencies to detect foreign object removal. By actively checking at optimized intervals rather than waiting passively, the system can detect removal conditions earlier and initiate restart procedures more quickly, improving productivity while maintaining safety through systematic verification
Solution Approach 2:
The system uses feedback from determination results to control restart timing. When determination confirms foreign object removal, the controller initiates power transmission restart. This feedback mechanism ensures safety verification while enabling swift restart, resolving the contradiction between safety and productivity
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
This solution enables efficient restart of wireless charging after a foreign object is removed, minimizing power consumption and preventing battery exhaustion, while also allowing for swift restarts or reduced power usage depending on the situation, thus enhancing the vehicle's operational efficiency and reducing costs by eliminating the need for a foreign object detecting mechanism in the vehicle.
Implementation Method 1
a power receiver configured to wirelessly receive electric power from power transmission equipment disposed outside the vehicle
Data Source
AI summary
An electric vehicle includes a power receiver and a controller. The power receiver is configured to wirelessly receive electric power from power transmission equipment disposed outside the vehicle. The controller is configured to control power transmission from the power transmission equipment to the power receiver. The controller includes a determination processor and a frequency control unit. The determination processor is configured to make a determination, in a case where the power transmission is stopped due to a foreign object present between the power transmission equipment and the vehicle, as to whether the power transmission is restartable with a predetermined frequency after the power transmission is stopped. The frequency control unit is configured to change the frequency with which the determination processor makes the determination.