Vehicle Wireless Charging Controller Mode Switching
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Solution Overview
Problem
Wireless charging devices in vehicles face issues with position deviation of mobile devices due to inertial force and vibration, leading to impaired charging efficiency, heat generation, and electromagnetic noise.
Innovation Solution
A wireless charging device for vehicles equipped with a mounting unit, power transmitter, position detector, and controller that switches between normal and enlargement modes, including standard and increased current modes, to adapt to position deviations and maintain efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power transmitter uses a fixed standard charging mode, then charging efficiency is maintained when the mobile device is correctly positioned, but charging fails or efficiency drops when position deviation occurs due to vibration and inertial force
Solution Approach 1:
The patent applies dynamics by making the charging mode adjustable rather than fixed. The controller dynamically switches between standard charging mode and enlarged charging mode based on the detected position of the mobile device. When position deviation is detected, the system transitions to enlarged charging mode with expanded detection and charging regions, allowing charging to continue despite vibration and inertial force effects.
Solution Approach 2:
The patent implements parameter changes by modifying the charging region parameters. The enlarged charging mode expands the detection region and charging region beyond the standard boundaries. This parameter adjustment allows the system to accommodate position deviations while maintaining charging functionality, resolving the contradiction between reliability and adaptability.
2Productivity
If the wireless charging device continuously operates at high power to ensure charging, then charging speed is maintained, but heat generation and electromagnetic noise increase
Solution Approach 1:
The patent applies periodic action through continuous position detection and dynamic mode switching. The controller periodically detects the mobile device position and adjusts the charging mode accordingly. This periodic monitoring allows the system to operate at high power only when necessary (when position deviation occurs), rather than continuously, thereby reducing overall heat generation and electromagnetic noise while maintaining charging speed when needed.
Solution Approach 2:
The patent implements feedback through the position detection mechanism that provides real-time information about mobile device position to the controller. Based on this feedback, the controller adjusts the charging mode to optimize the balance between charging speed and harmful factor generation. The feedback loop ensures high power operation only when position deviation is detected, minimizing unnecessary electromagnetic noise and heat.
3Duration of action of stationary object
If the charging device expands the detection region to cover position deviations, then charging continuity is maintained, but the area requiring electromagnetic field coverage increases, leading to greater energy loss
Solution Approach 1:
The patent applies dynamics by making the detection region size adaptive rather than static. The system uses a standard detection region when the mobile device is correctly positioned and switches to an enlarged detection region only when position deviation is detected. This dynamic adjustment maintains charging continuity when needed while minimizing the electromagnetic field coverage area during normal operation, thereby reducing energy loss.
Solution Approach 2:
The patent implements partial action by expanding the detection region beyond the standard boundaries only partially and only when necessary. The enlarged charging mode provides just enough additional coverage to accommodate typical position deviations caused by vibration, without unnecessarily expanding the electromagnetic field coverage area. This partial expansion maintains charging continuity while limiting energy loss.
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
The solution effectively addresses position deviations by adjusting charging modes to compensate for decreased efficiency and reduce electromagnetic noise, ensuring continuous and efficient charging of mobile devices during vehicle travel.
Implementation Method 1
a power transmitter configured to wirelessly transmit electric power to the power receiver of the mobile device
Data Source
AI summary
A wireless charging device for a vehicle includes a mounting unit, a power transmitter, a position detector, and a controller. The mounting unit is to be mounted with a mobile device. The power transmitter wirelessly transmits electric power to a power receiver of the mobile device. The position detector detects a position of the power receiver of the mobile device mounted on the mounting unit. The controller switches between charging modes including a normal mode of allowing charging if the power receiver is positioned in a standard region of the mounting unit, and enlargement modes of allowing the charging also if the power receiver is positioned in an enlarged region outside the standard region. The enlargement modes include a standard current mode in which a standard current is outputted to the power transmitter, and an increased current mode in which a current larger than the standard current is outputted.