Vehicle Front Shielding for Inductive Charging Interference
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Solution Overview
Problem
Conventional electric vehicles with inductive energy transfer systems experience interference from electromagnetic radiation during charging, which affects onboard electronics and poses challenges in pedestrian safety due to the integration of transformer components in critical crash zones.
Innovation Solution
Incorporating a deformation element made of foam and a shielding element, such as a perforated plate of electrically conductive material, strategically positioned between the secondary transformer unit and the shielding element to prevent electromagnetic radiation interference and enhance pedestrian safety by optimizing crash behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the secondary transformer unit is integrated into the vehicle front for inductive charging, then charging convenience is improved, but electromagnetic radiation interferes with onboard electronics
Solution Approach 1:
A shielding element made of electrically conductive material is introduced as an intermediary between the secondary transformer unit and the vehicle's onboard electronics. This shielding element acts as a mediator that blocks electromagnetic radiation from the transformer while allowing the charging function to operate, thus resolving the contradiction between charging convenience and electromagnetic interference protection
2Adaptability or versatility
If transformer components are integrated into the front bumper area, then charging functionality is improved, but pedestrian safety is worsened due to increased hardness in crash zones
Solution Approach 1:
The front bumper area is segmented into distinct functional zones: a deformation element made of foam material for pedestrian safety, a shielding element for electromagnetic protection, and the secondary transformer unit for charging. This segmentation allows each component to fulfill its specific function without compromising the others, enabling the transformer to be integrated while maintaining the bumper's deformability in crash zones
Solution Approach 2:
Different local qualities are assigned to different regions of the front bumper assembly. The deformation element maintains softness and deformability for pedestrian safety, while the shielding element provides electromagnetic shielding, and the transformer unit provides charging functionality. This local differentiation resolves the contradiction between integrating charging functionality and maintaining overall bumper deformability
3Object-affected harmful factors
If shielding elements are added to block electromagnetic radiation, then electromagnetic interference protection is improved, but device complexity increases
Solution Approach 1:
The shielding element is designed to serve multiple functions simultaneously: it provides electromagnetic radiation shielding, acts as a structural component of the front bumper assembly, and can be integrated with the deformation element. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while still providing effective electromagnetic interference protection
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 reduces electromagnetic interference with onboard electronics while ensuring a safer vehicle front by allowing for flexible installation and deformation of components, maintaining a smooth vehicle front and minimizing the risk of injury to pedestrians.
Implementation Method 1
a shielding element constructed as a plate against electromagnetic radiation, which is designed to prevent propagation of electromagnetic radiation into the vehicle
Implementation Method 2
a deformation element formed of foam for the protection of pedestrians
Implementation Method 3
a secondary transformer unit for charging an energy storage device with electrical energy via a transformer
Data Source
AI summary
A vehicle with an electric drive includes at least one deformation element for protection of pedestrians, which is at least partially formed of a foamed material; at least one secondary transformer unit for electrically charging an energy storage device of the vehicle; and at least one shielding element configured to prevent propagation of electromagnetic radiation emitted from the secondary transformer unit into the vehicle.