Wireless Power Module with Shielded Antennas for Vehicle Charging
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Solution Overview
Problem
The existing wireless charging technologies for vehicles are not compatible between magnetic induction and magnetic resonance methods due to different operating frequencies, leading to reduced charging efficiency, and there is a need for a solution that can enhance compatibility and usability while maintaining efficient charging across both methods.
Innovation Solution
A wireless power transmission module for vehicles that incorporates both magnetic induction and magnetic resonance methods, utilizing two antennas with different charging schemes, including Qi and PMA standard methods, and includes a near-field communication (NFC) antenna for data transmission, with strategically positioned and shielded antennas to optimize coupling coefficients and charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both magnetic induction and magnetic resonance antennas are integrated into one module, then compatibility and usability are improved, but device complexity increases
Solution Approach 1:
The patent combines both magnetic induction antenna and magnetic resonance antenna into a single wireless power transmission module, allowing the system to support multiple charging standards (Qi, PMA, A4WP) simultaneously. This merging approach resolves the technical contradiction by integrating multiple functions into one unified device structure.
Solution Approach 2:
The wireless power transmission module is designed with universal functionality to support both magnetic induction and magnetic resonance charging methods through a single device. The module can adaptively serve multiple charging standards without requiring separate dedicated devices for each method.
2Speed
If magnetic resonance method operates at high frequency band, then charging speed is improved, but charging efficiency is reduced due to splitting when coupling coefficient is excessively high
Solution Approach 1:
The system dynamically adjusts the coupling coefficient between the magnetic resonance antenna and the portable device to optimize charging efficiency. By controlling the coupling strength, the system prevents excessive splitting effects that would reduce efficiency while maintaining high-frequency operation for fast charging.
Solution Approach 2:
The patent adjusts operational parameters including the coupling coefficient and resonant frequency to achieve optimal charging performance. By modifying these parameters, the system balances charging speed and efficiency, preventing energy loss due to splitting while maintaining high-frequency operation.
3Loss of energy
If magnetic induction method operates at low frequency band, then charging efficiency is improved with higher coupling coefficient, but compatibility with magnetic resonance method is lost
Solution Approach 1:
The wireless power transmission module is segmented into distinct functional components: a magnetic induction antenna for low-frequency efficient charging and a magnetic resonance antenna for high-frequency versatile charging. This segmentation allows each antenna to operate optimally in its designated frequency band while maintaining overall system compatibility.
4Loss of energy
If distance between portable device and antenna is reduced to improve coupling coefficient, then charging efficiency is improved, but interference between multiple antennas increases
Solution Approach 1:
The patent introduces a shielding unit as an intermediary component positioned between the magnetic induction antenna and the magnetic resonance antenna. This shielding unit prevents electromagnetic interference between the two antennas while allowing each to maintain optimal coupling with the portable device, thus resolving the contradiction between charging efficiency and interference.
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 module enables simultaneous wireless charging using both magnetic induction and magnetic resonance methods, improving compatibility and usability, and enhances charging efficiency by maintaining appropriate distances between the portable device and the antennas, while also allowing for data communication through the NFC antenna.
Implementation Method 1
the magnetic induction method and the magnetic resonance method described above are the same technologies in that these are using an electromagnetic field and the electromagnetic field is generated by using a coil and electric power is transmitted through the electromagnetic field
Implementation Method 2
the magnetic induction method is different from the magnetic resonance method uses electromagnetic resonance between coils
Implementation Method 3
a shielding unit including a first shielding sheet disposed in an area corresponding to the first wireless power transmission antenna and a second shielding sheet disposed in an area corresponding to the second wireless power transmission antenna
Data Source
AI summary
There is provided a wireless power transmission module for a vehicle that includes a housing providing an internal space and including an upper plate on which a portable device to be charged is placed, an antenna unit including a first wireless power transmission antenna operating in a magnetic induction method and a second wireless power transmission antenna operating in a magnetic resonance method, and a shielding unit including a first shielding sheet disposed in an area corresponding to the first wireless power transmission antenna and a second shielding sheet disposed in an area corresponding to the second wireless power transmission antenna. The antenna unit is placed inside the housing so that a first distance from the first wireless power transmission antenna to an outer surface of the upper plate is shorter than a second distance from the second wireless power transmission antenna to the outer surface of the upper plate.