Charging Socket Shield Grounding via Insulated Conductor
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Solution Overview
Problem
Current charging systems for electric vehicles fail to prevent electromagnetic interference (EMI) as they do not provide a connection option for the cable shield, leading to neutralization of its protective effect within the vehicle.
Innovation Solution
The cable shield is electrically connected to ground potential, ensuring uninterrupted shielding and preventing EMI by integrating it with the charging socket through a simple plug-in process using an insulated conductor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the cable shield is severed in the area of the charging socket, then the charging socket can be constructed without a connection option for the cable shield, but the shielding function is neutralized and electromagnetic interference cannot be ruled out
Solution Approach 1:
The charging socket is divided into functional components: an outer socket for mechanical connection and an inner socket specifically for electrical connection of the cable shield to ground potential. This segmentation allows the shield connection function to be integrated without complicating the overall charging socket structure.
Solution Approach 2:
An insulated conductor serves as an intermediary element that electrically connects the cable shield to ground potential through the inner socket. This mediator enables the shielding function to be maintained while keeping the charging socket construction simple and modular.
2Object-affected harmful factors
If the cable shield is electrically connected to ground potential through inner and outer sockets, then the shielding function is fully retained and electromagnetic interference is prevented, but the device structure becomes more complex
Solution Approach 1:
The inner socket and outer socket are merged into a single integrated charging socket assembly. The outer socket provides mechanical connection while the inner socket provides electrical connection for the shield, combining multiple functions into one unified structure that does not increase overall device complexity.
Solution Approach 2:
The charging socket is designed with multi-functionality: the outer socket handles mechanical connection and positioning, while the inner socket handles electrical connection of the cable shield to ground potential. This universal design allows a single charging socket to perform multiple functions without requiring separate components.
3Object-affected harmful factors
If a complex grounding arrangement with multiple connection points is used, then the shielding function is improved, but the ease of manufacture and assembly is reduced
Solution Approach 1:
The inner socket is pre-configured with the electrical connection path to ground potential during manufacturing. This preliminary action ensures that during assembly, the cable shield simply needs to be connected to the inner socket, and the grounding path is already established, simplifying the assembly process while maintaining shielding effectiveness.
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
This solution effectively maintains the shielding function, eliminating electromagnetic interference and ensuring a secure electrical connection within the vehicle.
Implementation Method 1
the screen of the cable is electrically connected to ground potential, to which the charging socket is also connected
Implementation Method 2
a common, flexible electrical shield surrounding all cores to protect against electromagnetic interference radiation (EMC)
Data Source
Figure 1~4
Figure 5~6
AI summary
The arrangement has a cylindrical inner sleeve (13) arranged on an electrical shield (10). A backward bent free end of the shield rests on an outer surface of the sleeve. The inner sleeve is surrounded by a metal cylindrical outer sleeve (14), which rests with a press fit on the backward bent free end of the shield. A contact part (17) is mounted on a contact element (15) of the outer sleeve and attached at an end of an insulated electric conductor (16). An end of the outer sleeve is attached to a mass point (12) of a motor vehicle. The inner and outer sleeves are made of brass.