Wired Wireless Integrated Power Reception System Impedance Interference
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Solution Overview
Problem
The existing wired/wireless charging systems for electric vehicles face interference due to mutual impedance when both systems operate simultaneously, reducing the efficiency of the wired charging system.
Innovation Solution
A wired/wireless integrated power reception system that includes a relay unit to switch between wired and wireless power receiving modes, utilizing a driving circuit with a main relay, auxiliary relays, and a rectifier to minimize structural changes and impedance interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wired and wireless charging systems are combined at a high-frequency AC terminal, then both charging modes can be integrated into one system, but mutual impedance occurs causing interference and reduced efficiency
Solution Approach 1:
The patent divides the charging system into separate operational paths by introducing a relay unit that can switch between wired and wireless charging modes. This segmentation prevents mutual impedance by ensuring that only one charging path is active at a time, while still providing integrated functionality through the switching mechanism.
Solution Approach 2:
The patent employs a dynamically controllable relay unit that can switch between different charging modes based on operational requirements. This dynamic switching capability allows the system to adapt between wired and wireless charging while preventing impedance interference by isolating the two paths during operation.
2Adaptability or versatility
If wired and wireless chargers operate simultaneously, then charging flexibility is improved, but output control range of the wired charger is reduced due to impedance of resonant tank and wireless charging pad
Solution Approach 1:
The relay unit provides dynamic switching between wired and wireless charging modes, allowing the system to select the optimal charging path based on real-time conditions. This dynamic control maintains charging flexibility while preventing efficiency loss by avoiding simultaneous operation that causes impedance interference.
Solution Approach 2:
The relay unit acts as an intermediary component that manages the interaction between wired and wireless charging paths. By controlling the switching between these paths, the relay prevents direct impedance interaction while maintaining system flexibility.
3Reliability
If a relay unit is introduced to switch between wired and wireless power receiving modes, then impedance interference is eliminated, but device complexity increases
Solution Approach 1:
The relay unit serves as a simple intermediary component that provides clean switching between wired and wireless charging paths. This single switching component effectively eliminates impedance interference without requiring complex control systems or multiple additional components.
Solution Approach 2:
The relay unit is designed to operate with automatic control based on charging mode detection, reducing the need for complex external control systems. The system self-regulates the switching between wired and wireless modes based on operational conditions.
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 the combination of wireless and wired power transmission systems without affecting each other's operation, solving impedance interference issues and maintaining efficiency in both modes.
Implementation Method 1
mutual impedance occurs when the wired and wireless charging systems are combined at a high-frequency AC terminal
Implementation Method 2
the wired power reception apparatus may include a rectifier
Implementation Method 3
the driving circuit may include a power supply unit and an auxiliary coil
Data Source
AI summary
The present disclosure relates to a wired/wireless integrated power reception system provided in a vehicle, the wireless/wireless integrated power reception system including: a wired power reception apparatus configured to receive power from a transformer in a wired power receiving mode; a relay unit, which upon detecting reception of wireless power from a wireless power transmission pad, is configured to switch to a wireless power receiving mode; and a wireless power reception pad configured to receive power by magnetic coupling in the wireless power receiving mode.