High Voltage Hybrid Charging System Wireless Wired Mode Switching
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Solution Overview
Problem
High power wireless charging systems face challenges with high current induced overheating, which can damage components and reduce long-term reliability, necessitating a solution to reduce current flow through the receiver coil.
Innovation Solution
A high voltage hybrid charging system is configured to operate in both wireless and wired modes, utilizing a rectifier, first and second power converters connected in cascade, and a load switch to manage power transfer, allowing transitions between modes and reducing current through the receiver coil by maintaining a higher output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high power wireless charging is implemented, then charging efficiency is improved, but current induced overheating increases causing component damage and reduced reliability
Solution Approach 1:
The patent segments the power transfer function into two independent paths: a wireless power transfer path (with transmitter coil and receiver coil) and a wired power transfer path (with power source input). This segmentation allows the system to switch between wireless and wired modes, preventing overheating in the wireless path by utilizing the wired path when necessary, thereby maintaining reliability while preserving charging efficiency.
2Power
If high current flows through the receiver coil, then power transfer capability is improved, but overheating and component damage increase
Solution Approach 1:
The patent introduces a controller as an intermediary that manages power distribution between the wireless and wired paths. The controller monitors system state and dynamically switches between power transfer modes, acting as a mediator that prevents excessive current in the receiver coil by redirecting power through the wired path when needed, thus maintaining power capability while preventing harmful overheating.
Solution Approach 2:
The patent changes the operational parameters of the charging system by switching between different power transfer modes (wireless vs. wired). This parameter change allows the system to adjust current flow characteristics dynamically - using wired mode when high current would cause overheating, and wireless mode when lower current is acceptable, thereby maintaining power transfer capability while avoiding component damage.
3Ease of operation
If wireless charging mode is used, then convenience is improved, but current induced heating increases reducing long term reliability
Solution Approach 1:
The patent makes the charging system dynamic by enabling real-time switching between wireless and wired charging modes. The controller continuously monitors system conditions and adapts the power transfer method accordingly, allowing the system to maintain convenience through wireless mode while preserving long-term reliability by transitioning to wired mode when thermal conditions require it, thus resolving the contradiction between ease of operation and duration of action.
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 system efficiently charges batteries while minimizing overheating risks, improving reliability by maintaining lower currents through the receiver coil and enhancing the overall efficiency of the power transfer process.
Implementation Method 1
a rectifier, a first power converter, a second power converter connected in cascade
Implementation Method 2
a first power converter, a second power converter connected in cascade
Implementation Method 3
a load switch connected between a voltage bus and a power port configured to be connected to the power source
Data Source
AI summary
A method includes configuring a high voltage charging system to operate in a wireless charging mode to charge a battery after a power source has been disconnected from the high voltage charging system, wherein the high voltage charging system comprises a rectifier, a first power converter, a second power converter connected in cascade, and a load switch connected between a voltage bus and a power port configured to be connected to the power source, and configuring the high voltage charging system to operate in a wired charging mode to charge the battery after the power source has been connected to the high voltage charging system.