Charging Socket Contact Structure for Stable Plug-In Signal Transmission
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Solution Overview
Problem
Existing charging devices for electric automobiles face issues with maintenance due to welded terminals on circuit boards, which are difficult to remove and can lead to poor contact, causing current leakage and safety risks.
Innovation Solution
An electrical connection structure featuring metal domes fixed along the circumference of a plugging hole on a circuit board, allowing a plugging terminal to form a stable connection with the domes, providing signal detection points and enabling frequent plugging and unplugging, with a design that includes a fixing, elastic, and contact portion for secure and durable contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals in the PE wire are directly welded on the circuit board, then the electrical connection is firm, but the terminals are difficult to remove during maintenance and increase maintenance manhours and cost
Solution Approach 1:
The patent divides the terminal structure into separate components: the circuit board, the metal dome, and the plugging terminal. This segmentation allows the terminal to be easily removed and replaced without damaging the circuit board, while still maintaining firm electrical connection during use through the elastic metal dome's contact mechanism.
2Reliability
If terminals in the PE wire are directly welded on the circuit board, then the connection is stable, but when not welded firmly, poor contact occurs causing current leakage and safety risks
Solution Approach 1:
The patent employs an elastic metal dome that can dynamically adapt to contact forces. The metal dome's elastic properties enable it to maintain consistent contact pressure with the plugging terminal, ensuring stable electrical connection and preventing poor contact that could lead to current leakage, while also accommodating assembly tolerances and vibration.
3Reliability
If welded terminals are used, then the electrical connection is stable, but maintenance time and cost increase
Solution Approach 1:
The patent divides the terminal structure into separate components: the circuit board, the metal dome, and the plugging terminal. This segmentation allows the terminal to be easily removed and replaced without damaging the circuit board, while still maintaining firm electrical connection during use through the elastic metal dome's contact mechanism.
Solution Approach 2:
The patent designs the terminal as a replaceable component that can be easily discarded (removed) and replaced when damaged or worn. The metal dome remains on the circuit board and can be reused, while only the plugging terminal needs to be replaced, reducing maintenance time and cost compared to replacing the entire welded assembly.
4Reliability
If welded terminals are used, then the connection is firm, but the structure complexity increases for maintenance operations
Solution Approach 1:
The patent divides the terminal structure into separate components: the circuit board, the metal dome, and the plugging terminal. This segmentation allows the terminal to be easily removed and replaced without damaging the circuit board, while still maintaining firm electrical connection during use through the elastic metal dome's contact mechanism.
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 ensures stable signal transmission, reduces maintenance costs, and enhances the service life of charging devices by allowing easy removal and reconnection of the plugging terminal, while maintaining consistent contact resistance even under vibration.
Implementation Method 1
the elastic portion is elastically deformed, and the contact portions exert a pressure on the plugging terminal
Data Source
AI summary
The present disclosure provides an electric connection structure, a charging socket and an automobile, which are applied to a circuit board provided with a plugging hole, the electric connection structure including: a plurality of metal domes and a plugging terminal, in which the plurality of metal domes are fixed to the circuit board along a circumferential direction of the plugging hole, and the plugging terminal is in contact connection with the plurality of metal domes in a state that the plugging terminal is plugged into the plugging hole, to form an electrical connection between the plugging terminal and the circuit board. According to the electrical connection structure of the present disclosure, the plugging terminal is in good contact with the metal domes which are firmly connected to the circuit board, and the metal domes provide a plurality of signal detection points, thereby ensuring the stability of signal transmission; meanwhile, the metal dome itself has a good performance, can be subjected to frequent plugging and unplugging with the plugging terminal, and achieves a long service life.