Temperature-Triggered Safety Element for Overheat-Sensing Connectors
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Solution Overview
Problem
Existing safety elements for electrical connectors fail to detect and prevent dangerous malfunctions caused by excessive heat generation, leading to potential damage.
Innovation Solution
A safety element that transitions from electrically insulating to conductive at a predetermined limit temperature, triggering a malfunction such as a short circuit, which can activate a safety function, and is designed to remain intact without damage, using materials like polymers or bimetallic materials that change conductivity with temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety element is used to prevent damage in connectors, then reliability is improved, but the device complexity increases due to additional temperature-dependent conductivity mechanisms
Solution Approach 1:
The patent combines multiple functions into the safety element: it serves as both a structural component (retaining ring or locking element) and a temperature-sensitive detection device. The safety element integrates the conductivity-changing material directly into its structure, eliminating the need for separate temperature sensors and simplifying the overall device architecture while maintaining high reliability
Solution Approach 2:
The safety element performs self-detection and self-signaling functions through its inherent temperature-dependent conductivity properties. When the connector overheats, the safety element automatically changes its electrical conductivity state, providing a built-in diagnostic capability without requiring external monitoring systems, thus improving reliability without proportional increases in complexity
2Object-affected harmful factors
If the safety element becomes conductive above limit temperature to trigger safety functions, then harmful factors are detected, but loss of information occurs as the insulation resistance changes make detection difficult
Solution Approach 1:
The patent employs a metaphorical 'electrical color change' where the safety element transitions from an insulating state (safe condition) to a conductive state (overheat condition). This dramatic change in electrical property serves as a clear, unambiguous signal that is easily detectable by measurement systems, preventing information loss and ensuring accurate malfunction detection
Solution Approach 2:
The safety element utilizes temperature-dependent parameter changes in its conductivity to indicate thermal conditions. By selecting materials with pronounced conductivity transitions at specific temperatures, the system achieves sensitive and reliable overheat detection, converting subtle thermal changes into easily measurable electrical signals without losing diagnostic information
3Strength
If the limit temperature is set low to prevent damage, then strength is improved, but the connector functionality is reduced as the safety element triggers malfunction at lower temperatures
Solution Approach 1:
The patent applies different quality thresholds to different aspects of connector operation. The safety element is designed with localized temperature-sensitive properties that trigger at temperatures below the connector's maximum operational limit. This allows the connector to maintain full functionality within normal operating ranges while providing enhanced protection against catastrophic failure, effectively creating a layered safety approach that preserves productivity
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
Prevents damage by ensuring the connector remains functional below the limit temperature and triggers a safety function above it, allowing for detection of malfunctions and preventing further damage.
Implementation Method 1
The safety element is designed in such a way that it is electrically insulating below a predetermined limit temperature and is electrically conductive above the limit temperature
Implementation Method 2
The base body is formed with at least one bore that accommodates at least one electrically conductive element. In particular, the safety element is designed in such a way that, when the limit temperature is exceeded, the polymer from which the base body is formed melts and the at least one electrically conductive element is exposed
Implementation Method 3
the safety element comprises a shape-memory alloy that changes shape above the limit temperature so that the safety element becomes electrically conductive when the limit temperature is exceeded
Implementation Method 4
the safety element comprises an element made of bimetallic material that is designed to change electrical resistance and/or shape depending on the temperature in such a way that it is electrically insulating below a limit temperature and an electrically conducting effect above the limit temperature
Data Source
AI summary
A safety element (10) for an electrical connector (100), wherein the safety element (10) is designed such that it is electrically insulating below a limit temperature (TLimit), and wherein the safety element (10) is designed such that it is electrically conductive above the limit temperature (TLimit)