Electrical Isolating Device with Hydraulic Arc Suppression
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Solution Overview
Problem
Existing electrical isolating devices, particularly in high-voltage applications and electric vehicles, face challenges in complete disconnection due to arcing across the separation point, which can lead to incomplete separation and safety risks for occupants and rescuers.
Innovation Solution
An electrical disconnecting device utilizing a flowable medium, such as incompressible liquids or free-flowing bulk materials, is driven by an auxiliary drive to surround and break the separation point, ensuring complete separation and arc suppression by applying the entire energy directly to the point of separation, thereby preventing arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pyrotechnical auxiliary drive is used to separate the separation point, then the separation force is sufficient, but a compressible gas volume between the drive and separating chisel prevents complete energy transfer and reliable separation
Solution Approach 1:
The patent replaces the compressible gas volume with an incompressible liquid medium (hydraulic principle) that is pressed by the pyrotechnical auxiliary drive directly onto the separation point. This eliminates the energy loss associated with gas compression while maintaining the simplicity of the overall device structure. The liquid medium ensures complete energy transfer from the auxiliary drive to the separation point, achieving reliable separation without requiring additional complex components.
2Reliability
If high-voltage disconnection is performed, then electrical isolation is required, but arcs form across the gap at the separation point preventing complete electrical separation
Solution Approach 1:
The patent introduces a liquid medium as an intermediary substance between the separating chisel and the separation point. This liquid medium serves dual functions: it transmits the separating force reliably (as an incompressible fluid) and simultaneously suppresses arc formation by providing a conductive path that prevents high-voltage arcing across the gap. The intermediary liquid thus resolves both the mechanical separation and electrical isolation requirements simultaneously.
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 reliable and safe disconnection of high-voltage electrical connections, reducing the risk of arcing and ensuring the separation point is completely broken, even under high current conditions, thus enhancing safety during accidents or damage scenarios.
Implementation Method 1
The flowable medium is pressed in the direction of the separation point by the auxiliary drive, so that it breaks open the separation point
Implementation Method 2
The fact that the flowable medium at least partially flows around the separation point at the moment of separation ensures that the flowable medium spreads out in the air gap formed between the two connection parts. As a result, the occurrence of an arc can be suppressed or an arc that has occurred can be extinguished.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to an electrical isolating device (2) comprising a first connecting part (4a), a second connecting part (4b), an isolation point (6) which in the closed state forms a current path between the first and the second connecting parts (4a, 4b) and is located spatially between the connecting parts, wherein in the isolated state the isolation point (6) isolates the current path between the connecting parts (4a, 4b), and further comprising an auxiliary drive (8) which influences isolation of the isolation point (6). Particularly reliable isolation is ensured in that a flowable medium (10) driven by the auxiliary drive is disposed in such a way that it surrounds the isolation point (6) at least partially at least at the moment of isolation.