High-Voltage Wiring Shielding Net for Vehicle EMI Grounding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current technologies are insufficient in shielding electromagnetic noise emitted from high voltage wiring in electrified vehicle battery systems, which can cause abnormal operation of electrical components.
Innovation Solution
A device using a conductive shielding net and structure that grounds high voltage wiring to the vehicle body, comprising a lower protector, conductive shielding structure, and upper protector to effectively shield electromagnetic radiation by increasing contact area and reducing contact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electromagnetic shielding structures are applied to high voltage battery and junction block, then electromagnetic noise shielding is improved, but technology for shielding electromagnetic noise from high voltage wiring remains insufficient
Solution Approach 1:
The shielding system is divided into three functional segments: upper protector, conductive shielding structure, and lower protector. Each segment performs a specific function - the protectors provide structural support and positioning, while the conductive shielding structure provides the actual electromagnetic shielding and grounding path. This segmentation allows the system to effectively shield high voltage wiring that was previously unprotected.
2Object-affected harmful factors
If conductive shielding structure is mounted on protector with increased contact area, then electromagnetic noise removal is improved, but device complexity increases
Solution Approach 1:
The conductive shielding structure is designed to create equipotential surfaces through extensive contact areas with the protectors and vehicle body. The conductive plates and legs form continuous conductive paths that maintain equal potential across the shielding structure, effectively directing electromagnetic noise to ground. This equipotential design improves noise removal while the modular protector structure keeps overall complexity manageable.
Solution Approach 2:
The conductive shielding structure acts as an intermediary between the high voltage wiring (surrounded by shielding net) and the vehicle body ground. It provides a dedicated pathway for electromagnetic noise to travel from the wiring, through the shielding structure, to the ground, preventing noise from interfering with other vehicle electronics.
3Object-affected harmful factors
If high voltage wiring is covered with conductive shielding net and grounded, then electromagnetic noise is removed, but contact resistance must be reduced for effective shielding
Solution Approach 1:
The conductive shielding net is pre-installed around the high voltage wiring before the protectors are mounted. The upper and lower protectors are then positioned to make predetermined contact with the net, ensuring low contact resistance pathways are established before the assembly is secured to the vehicle body. This preliminary positioning ensures reliable electrical contact for effective noise grounding.
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 device effectively removes electromagnetic noise from high voltage wiring, preventing abnormal operations of vehicle components and enhancing the durability of the shielding structure with a tin coating layer.
Implementation Method 1
a conductive shielding net attached to, while wrapping, an outer surface of the high voltage wiring, thereby being brought into close contact to be conductible with the conductive shielding structure
Implementation Method 2
connecting the conductive shielding structure to the vehicle body so as to be grounded when the protector is mounted on the vehicle body
Implementation Method 3
enhancing the durability of the shielding structure with a tin coating layer
Data Source
AI summary
In an embodiment a device comprising for shielding electromagnetic radiation includes a lower protector mountable on a vehicle body, a conductive shielding structure mountable on the lower protector and conductively connectable to the vehicle body, a conductive shielding net wrapped around and attached to an outer surface of a high voltage wiring, the conductive shielding net attachable and conductively connectable with the conductive shielding structure and an upper protector attachable to the lower protector and configured to press the conductive shielding net to the conductive shielding structure.