MR Fluid Channel Shielding for Wireless Charging Heat and EMI
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Solution Overview
Problem
Wireless charging generates heat and electromagnetic interference, and existing solutions like power limitation and metal shielding are inadequate for effective management.
Innovation Solution
A magnetorheological fluid system is employed, comprising a reservoir, pump, and channel array to distribute fluid for both cooling and electromagnetic interference shielding in vehicular components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If power transference is limited to keep temperatures low, then heat management is improved, but wireless charging efficiency deteriorates
Solution Approach 1:
The patent extracts the heat management function from the wireless charging system by introducing a separate magnetorheological fluid circulation system. The MR fluid is pumped through channels in the charging coil to carry away heat, allowing the wireless charging to operate at full power while thermal control is handled independently through the fluid cooling system.
2Object-affected harmful factors
If metal shielding is used to block electromagnetic interference, then EMI shielding is improved, but signal blockage increases
Solution Approach 1:
The patent changes the magnetic properties of the MR fluid by applying magnetic fields, which alters its viscosity and flow characteristics. When a magnetic field is applied to the MR fluid in the channels, it becomes more viscous and can better shield against EMI, while when the field is removed, it returns to normal flow state, allowing signal transmission without blockage.
3Object-affected harmful factors
If ferrite bars are used to alter radiation of signals, then EMI shielding is improved, but device complexity increases
Solution Approach 1:
The patent makes the MR fluid system multi-functional by combining both cooling and EMI shielding capabilities in a single fluid circulation system. The same MR fluid that cools the charging coil through heat convection also provides EMI shielding when magnetic fields are applied, eliminating the need for separate ferrite bars or additional shielding components.
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 effectively manages heat and shields against electromagnetic interference by using magnetorheological fluids, providing efficient cooling and shielding to vehicular components.
Implementation Method 1
A magnetorheological fluid system for cooling and electromagnetic interference shielding
Implementation Method 2
using a magnetorheological fluid system to provide such cooling and electromagnetic interference shielding
Data Source
AI summary
Systems and methods described herein relate to implementing magnetorheological fluid-based cooling or shielding strategies. In one embodiment, a method includes storing magnetorheological fluid; pumping the magnetorheological fluid; cooling the magnetorheological fluid; and distributing the magnetorheological fluid within an array of channels within a structure to provide cooling or electromagnetic interference shielding to a vehicular component.