Wireless EV Charging System With High-Frequency Inductive Transfer
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Solution Overview
Problem
Conventional vehicle battery charging systems take too long to charge electric vehicle batteries and lack convenience, as they require physical plugging into a power source and have inefficiencies at low voltage and frequency.
Innovation Solution
An electrical charging system using high voltage and high frequency signals, with inductive coils for wireless energy transfer, and a multiswitch for simultaneous charging of multiple vehicles, along with alignment mechanisms and signal shaping devices for efficient and safe charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional low voltage 120 VAC 60 Hz electrical charging system is used, then the system is simple and safe to operate, but the charging time is too long and power efficiency is low
Solution Approach 1:
The patent applies parameter changes by transitioning from conventional low voltage (120 VAC) and low frequency (60 Hz) electrical charging to high voltage and high frequency electrical charging. This fundamental parameter change enables significantly faster charging speeds and improved power efficiency while maintaining system safety through controlled electromagnetic energy transfer via inductive coils
2Ease of operation
If conventional plugging system is used, then the electrical connection is reliable, but the operation convenience is poor as physical plugging is required
Solution Approach 1:
The patent replaces the mechanical plugging system with a wireless inductive charging system. Instead of requiring physical connection between charger and vehicle, the system uses electromagnetic fields generated by inductive coils to transfer energy wirelessly, eliminating the need for manual plugging while maintaining reliable energy transfer
Solution Approach 2:
The patent introduces inductive coils as an intermediary medium for energy transfer. The coils act as a mediator between the power source and the battery, enabling wireless energy transmission through electromagnetic induction without direct physical contact, thus improving operational convenience
3Power
If high voltage high frequency system is used, then the charging speed and power efficiency are improved, but the safety and reliability of electrical signal transmission become concerns
Solution Approach 1:
The inductive coils serve as an intermediary that isolates the high voltage high frequency circuitry from direct contact with users and sensitive components. The electromagnetic field acts as a buffer, allowing efficient power transfer while reducing the risk of electrical shocks and interference, thus mitigating safety hazards associated with high power transmission
4Adaptability or versatility
If single vehicle charging system is used, then the system is simple, but the versatility is limited as it cannot charge multiple vehicles simultaneously
Solution Approach 1:
The patent implements multi-functionality by designing the electrical charging system with a multiswitch that can selectively connect and charge multiple vehicles simultaneously. The system maintains a single high voltage high frequency power source that can be distributed to multiple inductive charging stations, enabling versatile operation without requiring separate charging systems for each vehicle
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 enables faster, safer, and more convenient battery charging with higher power efficiency and flexibility, allowing charging without physical connection and supporting multiple vehicles simultaneously.
Implementation Method 1
An off-vehicle inductive coil is disposed external to the vehicle and is in electrical communication with the power transmitter. An on-vehicle inductive coil is disposed on the vehicle and is configured to receive at least a portion of the energy wirelessly transmitted from the off-vehicle inductive coil.
Implementation Method 2
The electrical signal shaping device is in electrical communication with the on-vehicle inductive coil to electrically shape at least a portion of the received energy and electrically transmit the electrically-shaped energy to electrically charge the battery.
Data Source
AI summary
An electrical charging system configured to charge a battery includes a power transmitter, an energy coupling arrangement, an electrical signal shaping device including a controller, and an alignment means. The arrangement includes a first inductive coil disposed external to the vehicle and a second inductive coil attached with the vehicle. The alignment means communicates with the vehicle to ensure repeatable vehicle positioning so that the second inductive coil is positioned relative to the first inductive coil so that the second inductive coil receives the energy produced by the power transmitter wirelessly transmitted from the first inductive coil. The energy received by the second inductive coil is electrically shaped by the electrical signal shaping device and further transmitted through the electrical signal shaping device as controlled by the controller to charge the battery. Methods for transmitting energy through the electrical charging system to charge the battery are also presented.