High-Voltage Housing Cover Interlock Using a Discharge Cable
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Solution Overview
Problem
High-voltage components in the automotive sector pose a risk of electric shock during maintenance, and conventional solutions are either expensive or prone to malfunction when attempting to discharge the voltage before opening the cover.
Innovation Solution
A high-voltage component design featuring a housing with a cover element detachably connected via multiple connecting elements, where a cable extends from a non-detachable first connection to a second connection, ensuring that the first connecting elements are covered and only accessible after the second connection is detached, causing the component to discharge and allowing safe opening of the cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional contact switches are added to detect cover opening, then safety detection is improved, but device complexity and cost increase
Solution Approach 1:
The system uses the existing cable and connection elements to automatically detect cover opening status. The control unit monitors whether the cable is properly connected and whether connecting elements are engaged, using this information to determine if the cover is open or closed. This self-detection approach eliminates the need for additional contact switches while maintaining safety detection capability.
Solution Approach 2:
The cable and connecting elements serve dual functions: they provide electrical connection for power and signal transmission, and simultaneously serve as safety detection mechanisms. The control unit uses the connection status of these existing components to infer cover position, making the system elements multi-functional and avoiding additional hardware.
2Reliability
If additional contact switches and detection systems are added, then safety is improved, but manufacturing cost increases
Solution Approach 1:
The existing cable and connecting elements perform dual roles as both electrical connectors and safety detection sensors. The control unit processes signals from these existing components to determine cover status, eliminating the need for additional expensive contact switches and detection systems, thereby reducing manufacturing costs while maintaining safety.
Solution Approach 2:
Instead of adding physical contact switches, the system uses electrical connection status as a proxy for mechanical cover position. The control unit infers cover opening status from the electrical connection state of the cable and connecting elements, creating a virtual detection mechanism that avoids additional hardware costs.
3Ease of operation
If the cover is made easily accessible for maintenance, then ease of operation is improved, but risk of electric shock increases
Solution Approach 1:
The control unit continuously monitors the connection status of the cable and connecting elements before allowing cover opening. It ensures that the high-voltage component is properly disconnected and discharged before the cover can be opened, performing the safety check in advance to prevent electric shock while maintaining ease of maintenance.
Solution Approach 2:
The system provides feedback to the user about the safety status through the control unit. The control unit monitors connection status and communicates whether it is safe to open the cover, giving users real-time information about electric shock risk while allowing easy access when safe conditions are met.
Data Source
AI summary
A high-voltage component includes a housing and a high-voltage connection arranged therein. The housing includes a cover element, which closes an opening of the housing. The high-voltage connection is accessible from the outside exclusively via the opening. The cover element is releasably connected to the housing via a plurality of connecting elements. A cable extends, from a non-detachable first connection arranged on the housing, outside the housing at least partially over the cover element to a second connection arranged on the housing in such a way that at least one first connecting element is covered by the cable and is thus not accessible from the outside.