Fuse Unit Reconnection Structure After Bus Bar Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuse units do not allow for a simple and safe method to temporarily restore electrical connections after they have been disconnected, which is crucial for situations like vehicle accidents where immediate movement of the vehicle is necessary for safety.
Innovation Solution
A fuse unit design comprising a bus bar with a cuttable portion, a cutting portion made of an insulator, and a reconnecting portion made of a conductor, allowing for the bus bar to be cut and subsequently reconnected using explosive-actuated mechanisms within a case body, ensuring safe and efficient restoration of electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bus bar is cut to disconnect electrical connection for safety, then safety is improved, but the ability to temporarily restore connection is lost
Solution Approach 1:
The bus bar is segmented into a first portion and a second portion that can be separated by cutting. The reconnecting portion is further segmented into a first connecting portion and a second connecting portion that can independently contact the respective bus bar portions. This segmentation enables both disconnection for safety and reconnection for temporary restoration of electrical connection.
Solution Approach 2:
The reconnecting portion is designed to be movable between a retracted state (where it does not contact the bus bar portions) and a contacted state (where it bridges the first and second portions). This dynamic capability allows the system to transition from a permanently disconnected state to a temporarily reconnected state, resolving the contradiction between safety and adaptability.
2Adaptability or versatility
If complex reconnection mechanisms are added to restore electrical connections, then the ability to restore connection is improved, but device complexity increases
Solution Approach 1:
The reconnecting portion combines multiple functions into a single component: it serves as both the bridging element and the connection mechanism. The first and second connecting portions are integrated into one movable structure, eliminating the need for separate reconnection devices and reducing overall system complexity while maintaining the ability to restore electrical connections.
Solution Approach 2:
The reconnecting portion is designed as a multi-functional component that can perform both connection and disconnection operations. By making this single component movable, it universally handles both the restoration of electrical connection and the maintenance of disconnection state, eliminating the need for multiple specialized 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
Enables the temporary restoration of electrical connections in a simple configuration, enhancing safety by allowing vehicles to be moved safely after accidents and providing essential services like air conditioning, while minimizing component count and weight.
Implementation Method 1
The cutting portion includes a tip portion that cuts the bus bar into a first portion and a second portion at the cuttable portion
Implementation Method 2
The reconnecting portion includes a first connecting portion in contact with the first portion and a second connecting portion in contact with the second portion
Data Source
AI summary
A fuse unit includes: a bus bar made of a conductor and provided with a cuttable portion; a case body supporting two points sandwiching the cuttable portion; a cutting portion made of an insulator and disposed in a first space in an internal space of the case body on one side with respect to the bus bar; and a reconnecting portion made of a conductor and disposed in a second space in the internal space on a side of the bus bar opposite to the first space. The cutting portion includes a tip portion that cuts the bus bar into a first portion and a second portion at the cuttable portion. The tip portion is movable into the second space. The reconnecting portion includes a first connecting portion in contact with the first portion and a second connecting portion in contact with the second portion.