Dual-Source On-Board Charging With Wireless Power Resonance
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Solution Overview
Problem
Existing electric vehicle charging systems face inefficiencies with wired connections, which are cumbersome and require physical cables, while wireless power transfer systems need improvements for efficient and effective power reception, conditioning, and storage.
Innovation Solution
A dual-source electric vehicle charging system that integrates both wired and wireless power transfer capabilities, utilizing a first and second power converter, an isolation transformer, and transformer coils to facilitate bidirectional power transfer, with capacitors forming a resonant circuit and a power bypass for efficient power routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired charging connections are used, then power transfer reliability is improved, but ease of operation deteriorates due to cumbersome cables and physical connectors
Solution Approach 1:
The patent replaces the mechanical wired charging system with cables and physical connectors with a wireless power transfer system using electromagnetic fields. This substitution eliminates the need for physical connections while maintaining power transfer capability, thereby improving ease of operation without sacrificing reliability through the use of magnetic coupling and electromagnetic induction
2Ease of operation
If wireless power transfer is implemented, then ease of operation is improved by eliminating cables, but device complexity increases due to additional transformer coils and circuitry
Solution Approach 1:
The patent implements a dual-mode charging system where the same power conversion circuitry and control mechanisms serve both wired and wireless charging functions. The power converter can operate in different modes depending on the charging type, and the system automatically selects the appropriate charging mode, thereby reducing overall device complexity through multi-functionality rather than requiring separate dedicated systems for each charging type
Solution Approach 2:
The patent introduces a power converter as an intermediary component that mediates between the wireless power transfer coil and the battery charging system. This intermediary handles the complex signal conversion and power regulation, isolating the complexity from both the wireless reception side and the battery charging side, thereby simplifying the overall system architecture while enabling wireless power transfer
3Adaptability or versatility
If dual-source charging system is used, then adaptability is improved by supporting both wired and wireless charging, but device complexity increases due to multiple power converters and isolation transformers
Solution Approach 1:
The patent employs a universal power converter design that can handle both wired AC/DC conversion and wireless power reception conditioning through software control and configurable circuitry. The same hardware infrastructure serves multiple charging modes, reducing the need for duplicate components and minimizing device complexity while maintaining full adaptability to both charging types
Solution Approach 2:
The patent merges the wired and wireless charging pathways into a unified power management architecture where both charging sources feed into a common power converter and battery management system. This consolidation eliminates redundant isolation transformers and control circuits by sharing common components, thereby reducing device complexity while preserving the ability to support both charging modes simultaneously or alternately
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 seamless switching between wired and wireless charging modes, optimizing power transfer efficiency and reducing the need for physical connections, while providing isolation and control through sensors and controllers.
Implementation Method 1
an isolation transformer having a first transformer coil coupled to the first power converter and a second transformer coil magnetically coupled to and galvanically isolated from the first transformer coil
Implementation Method 2
a third transformer coil magnetically coupled to and galvanically isolated from the first transformer coil and magnetically coupled to the second transformer coil, and a third power interface for connecting the third transformer coil to another device
Implementation Method 3
Capacitors may be connected between the second transformer coil and the second power converter, and when a wireless power transfer coil is connected to the third power interface, the capacitors may form a resonant circuit with the wireless power transfer coil
Data Source
AI summary
An apparatus for transferring power includes a first power converter coupled to a first power interface, an isolation transformer having a first transformer coil coupled to the first power converter and a second transformer coil magnetically coupled to and galvanically isolated from the first transformer coil, a second power converter coupled to the second coil of the isolation transformer and to a second power interface, a third transformer coil magnetically coupled to and galvanically isolated from the first transformer coil and magnetically coupled to the second transformer coil, and a third power interface for connecting the third transformer coil to a wireless power transmission (WPT) resonator.