Pyrotechnic Disconnector With Insulating Retention For Arcing Prevention
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Solution Overview
Problem
Conventional pyrotechnic circuit breakers for motor vehicle on-board networks lack effective mechanisms to prevent arcing and ensure safe disconnection of electrical paths, particularly in high-voltage scenarios, which can lead to damage and safety risks during emergency stop conditions.
Innovation Solution
A pyrotechnic circuit breaker design featuring a conductor structure with multiple points of separation, secured by an insulating retaining fuse, which distributes residual voltage across multiple separation points, reducing the risk of arcing and ensuring the separating piece remains fixed post-trip, thereby preventing loose elements and potential damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single break point is created in the conductor structure, then the device complexity is low, but the risk of arcing increases due to high voltage concentration at one disconnect point
Solution Approach 1:
The conductor structure is segmented into multiple disconnect points instead of a single break point. The separating element is designed to create multiple separation points along the conductor path, distributing the voltage stress across several locations and reducing arcing risk at each individual point.
2Reliability
If the separating piece is released after tripping, then the device complexity is low, but loose elements may cause damage or short circuits
Solution Approach 1:
A retaining mechanism acts as an intermediary component that holds the separating piece in a controlled manner after tripping. This retaining structure prevents the separating piece from becoming a loose hazard while maintaining the electrical disconnection, serving as a mediator between the separating element and the conductor structure.
3Reliability
If multiple break points are created to distribute voltage, then the arcing risk is reduced, but the manufacturing complexity increases
Solution Approach 1:
The conductor structure and separating element are designed as integrated components that work together to create multiple break points through a single tripping action. The separating element is positioned to simultaneously or sequentially create multiple separations along the conductor path, achieving voltage distribution without requiring multiple independent components.
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 design effectively reduces the risk of arcing and ensures safe disconnection by distributing voltage across multiple points, preventing loose elements and ensuring the separating piece remains fixed, thus enhancing safety and reliability during emergency stop conditions.
Implementation Method 1
a pyrotechnic unit (not explicitly shown) constructed according to a principle known per se
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
The invention relates to a pyrotechnic disconnector (2), particularly for an on-board power supply system of a motor vehicle, comprising a conductor structure (8) provided with two connection arms (10) and one linking arm (12) that electroconductively links the two connection arms (10), and also comprising a pyrotechnic unit and a separating body (4) for severing the linking arm (12) when triggered, a retention element (16) consisting of an insulating material adhering to the conductor structure (8), and the separating body (4) and/or the linking arm (12) being designed such that, when triggered, a separating part (14) is detached from the linking arm (12), the separating part (14) being held by the retention element (16).