Vehicle Wireless Charger Electrostatic Shield EMI Reduction
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Solution Overview
Problem
Integrating wireless battery charging systems into vehicles poses challenges due to electromagnetic interference (EMI) with other electronic components, which can disrupt the performance of on-board electronics such as AM radio reception.
Innovation Solution
A wireless battery charging system within a vehicle is implemented with an electromagnetic shield apparatus, including a conductive electrostatic shield or partial Faraday cage to reduce electromagnetic fields and prevent interference with vehicle electronics, allowing safe and efficient charging of rechargeable electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless battery charging system is integrated into a vehicle, then convenient wireless charging of electronic devices is achieved, but electromagnetic interference with on-board electronics occurs
Solution Approach 1:
An electrostatic shield is introduced as an intermediary component between the wireless charging system and the vehicle's electronic components. The shield acts as a mediator that blocks electromagnetic fields from reaching sensitive electronics while allowing the wireless charging function to operate normally, thus resolving the contradiction between charging convenience and EMI prevention
2Object-affected harmful factors
If electromagnetic shielding is added to the wireless charging system, then electromagnetic interference is reduced, but device complexity increases
Solution Approach 1:
The patent employs thin film electrostatic shields rather than bulky shielding structures. These thin films provide effective electromagnetic protection while maintaining a compact and simple overall device structure, thus reducing the complexity increase that would normally result from adding shielding
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 solution effectively minimizes electromagnetic interference, enabling the use of wireless charging systems in vehicles without degrading the performance of on-board electronics, ensuring reliable charging and preventing interference with AM/FM radio reception.
Implementation Method 1
a primary coil capable of inductively coupling magnetic energy for wirelessly charging a battery of a rechargeable electronic device
Implementation Method 2
an electrostatic shield designed to reduce electromagnetic fields from being coupled to the electronic components of the vehicle
Data Source
AI summary
A vehicle is provided having a wireless battery charger that is mounted within the vehicle, and an electrostatic shield for reducing electromagnetic interference radiated by the wireless battery charger.