Threaded Dielectric Terminal Caps for EV Charging Inlet Repair
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Solution Overview
Problem
Charging inlet assemblies for vehicles face challenges with finger protection caps that are prone to damage from electrical arcing and are difficult to repair or replace, often requiring removal of the entire assembly, and may inadvertently pop off and get lodged in charging plugs.
Innovation Solution
The charging inlet assembly incorporates dielectric terminal caps that are threadably coupled to the pins of the charging terminals, providing protection against electrical arcing and allowing for easy removal and replacement without disassembling the entire assembly, and are designed with a threaded bore and shaft to securely attach to the pins, preventing accidental detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional finger protection caps are used on charging terminals, then they provide protection against inadvertent touching, but they are susceptible to damage from electrical arcing and difficult to repair or replace
Solution Approach 1:
The charging inlet assembly is divided into separable components: the charging terminal body and the finger protection cap. The cap can be independently removed and replaced without affecting the terminal body, enabling easy maintenance while maintaining protection functionality.
Solution Approach 2:
The finger protection cap is designed as a replaceable, relatively simple component that can be easily manufactured and replaced at low cost. When damaged from electrical arcing, the cap can be discarded and replaced without investing significant resources in repair.
2Reliability
If traditional finger protection caps are used on charging terminals, then they provide protection against inadvertent touching, but they are susceptible to damage from electrical arcing
Solution Approach 1:
The finger protection cap is constructed from composite or specially selected materials that combine electrical insulation properties with high resistance to electrical arcing damage. This allows the cap to maintain its protective function while withstanding the harsh electrical environment during charging operations.
3Reliability
If traditional finger protection caps are used on charging terminals, then they provide protection against inadvertent touching, but they may inadvertently pop off and become lodged in the charging plug
Solution Approach 1:
The finger protection cap incorporates a retention mechanism that pre-establishes a secure connection between the cap and the charging terminal. This preliminary securing action prevents the cap from accidentally detaching during charging operations, eliminating the risk of the cap becoming lodged in the charging plug.
4Reliability
If the entire charging inlet assembly is removed for replacement of the charging terminal, then complete replacement is ensured, but the complexity and time of repair increases
Solution Approach 1:
The charging inlet assembly is segmented into independently serviceable components. The charging terminal can be accessed and replaced without removing the entire assembly, allowing technicians to work on only the specific component that needs replacement, thereby reducing repair time and complexity.
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 enhances the durability and maintainability of the charging inlet assembly by preventing damage from electrical arcing and simplifying the replacement of finger protection caps, reducing the risk of them becoming lodged in charging plugs, thus improving the overall reliability and user safety of vehicle charging systems.
Implementation Method 1
The terminal caps are manufactured from a dielectric material
Data Source
AI summary
A charging inlet assembly includes a charging inlet housing that has a front and a rear. The charging inlet housing has terminal channels between the front and the rear. The charging inlet assembly includes charging terminals received in the corresponding terminal channels and held in the charging inlet housing. The charging terminals have mating ends and terminating ends. The terminating ends configured to be electrically coupled to corresponding power cables. The mating ends include pins configured to be connected to a charging plug. The pins extend to distal ends. The charging inlet assembly includes terminal caps coupled to the corresponding pins. The terminal caps are manufactured from a dielectric material. The terminal caps are threadably coupled to the distal ends.