Layered Interior Lining for EV Magnetic Shielding and Acoustic Damping
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Solution Overview
Problem
Existing electric vehicles face challenges in shielding occupants from magnetic fields generated by high-voltage systems while maintaining sufficient acoustic damping due to space and weight constraints, with existing solutions either being inadequate or adding unnecessary mass.
Innovation Solution
A layered arrangement comprising a functional layer with a composite material and soft magnetic particles, an intermediate foam layer, and a textile surface layer provides effective magnetic shielding and acoustic insulation, with the soft magnetic particles aligned to enhance shielding efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional single-layer linings are used, then manufacturing is simple, but acoustic damping and noise reduction are insufficient
Solution Approach 1:
The lining is divided into multiple functional layers (first lining layer, second lining layer, intermediate layer) with distinct acoustic and mechanical properties. Each layer performs specific functions: the first layer provides acoustic damping, the second layer provides mechanical support and additional damping, and the intermediate layer bonds them while allowing relative movement. This segmentation enables superior acoustic noise reduction compared to single-layer constructions.
Solution Approach 2:
The patent employs composite material construction combining different materials with complementary properties. The first lining layer uses acoustic damping materials, the second lining layer uses mechanically robust materials, and the intermediate layer uses bonding materials with controlled properties. This composite structure achieves both acoustic noise reduction and structural integrity.
2Device complexity
If conventional single-layer linings are used, then structural simplicity is maintained, but vibration damping is insufficient
Solution Approach 1:
The lining structure is segmented into multiple layers that can move relative to each other, creating multiple damping interfaces. The intermediate layer specifically allows controlled relative movement between the first and second lining layers, generating friction-based damping that reduces vibrations transmitted through the lining structure.
Solution Approach 2:
The intermediate layer acts as a mediator between the first and second lining layers, enabling relative movement while maintaining structural integrity. This intermediary layer creates friction-based damping that reduces vibrations, while still allowing the outer surfaces to move together as a unit during normal operation.
3Object-affected harmful factors
If multiple layers are added to improve acoustic and vibration damping, then noise and vibration reduction improve, but manufacturing complexity increases
Solution Approach 1:
The multi-layer structure is segmented into functionally distinct layers that can be manufactured separately and then assembled. The first lining layer, second lining layer, and intermediate layer are designed as separate components with specific functions, allowing for specialized manufacturing processes for each layer before final assembly.
Solution Approach 2:
The intermediate layer serves as a mediator that simplifies the overall manufacturing process by providing a standardized bonding interface between the first and second lining layers. This intermediary layer ensures proper adhesion and allows for controlled relative movement, reducing the need for complex bonding procedures and ensuring consistent performance.
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 layered arrangement effectively shields occupants from magnetic interference while maintaining low weight and providing sufficient acoustic insulation, reducing interference with personal devices like insulin pumps or pacemakers.
Implementation Method 1
The first lining layer (1.1) is formed from a viscoelastic material... dampens acoustic vibrations
Implementation Method 2
The intermediate layer (1.2) bonds the first lining layer (1.1) to the second lining layer (1.3) while allowing relative movement between the first lining layer (1.1) and the second lining layer (1.3)
Data Source
Figure 1~3
AI summary
The invention relates to a layered arrangement (5) for lining an interior space (7), in particular of a motor vehicle (1), comprising a functional layer (9), an intermediate layer (11) and a top layer (13), wherein - the functional layer (9) comprises a composite material (9.1) composed of a matrix material (15) and soft-magnetic particles (17) embedded therein, wherein - the intermediate layer (11) comprises a foam material (11.1), wherein - the top layer (13) comprises a textile fabric (13.1), wherein - the top layer (13) has a visible surface (13.2), and also relates to interior-space damping (3) for a motor vehicle (1) with such a layered arrangement (5) and to a motor vehicle (1) with such interior-space damping (3).