Service Plug Automatic Power Interruption via Collision Actuator
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Solution Overview
Problem
Conventional service plugs for vehicles, used to interrupt power supply circuits during maintenance or repair, pose safety risks due to the potential for electric leakage when a high-voltage circuit is damaged in a collision, especially when manually operated.
Innovation Solution
A service plug with a switching lever and power interruption mechanism that uses an actuator, such as an explosive actuator, to automatically disconnect the power supply circuit upon detection of a vehicle collision, ensuring the power supply is interrupted safely and quickly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation of the service plug is used to interrupt power supply, then ease of operation is improved, but safety deteriorates due to potential electric leakage when high-voltage circuits are damaged in collisions
Solution Approach 1:
The service plug system performs the power interruption function automatically through the actuator mechanism upon detecting a collision, eliminating the need for manual intervention. The system serves itself by using the collision detection signal to trigger the actuator, which then moves the switching lever to open the power supply circuit, ensuring safety without requiring human operation in dangerous conditions
Solution Approach 2:
The patent replaces the manual mechanical operation system with an automated actuator mechanism. The actuator, driven by a motor or other driving means, substitutes for human hand operation to move the switching lever and interrupt the power supply circuit, thereby eliminating the safety risks associated with manual operation during collision emergencies
2Reliability
If automatic actuator operation is used to interrupt power supply during collision, then safety is improved, but device complexity increases
Solution Approach 1:
The actuator mechanism serves multiple functions: it moves the switching lever to open the power supply circuit, and can also potentially reset the circuit by returning the lever to its original position. This multi-functionality reduces the need for separate mechanisms for different operations, thereby limiting the increase in device complexity while maintaining safety improvements
Solution Approach 2:
The switching lever acts as an intermediary mechanical element between the actuator and the power supply circuit. Instead of the actuator directly manipulating the circuit connections, it uses the lever as a mediator to transfer the motion and achieve circuit interruption, simplifying the overall system architecture while maintaining the safety benefits of automatic operation
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 effectively interrupts the power supply from the battery during a vehicle collision, enhancing safety by automatically opening the power circuit and preventing potential short circuits, allowing for easy detachment of the service plug and reducing the risk of electric leakage.
Implementation Method 1
an actuator, such as an explosive actuator, to automatically disconnect the power supply circuit
Data Source
AI summary
A service plug includes a body portion including a pair of power bus bars that are connected to a power supply circuit by being connected to a first terminal of a connector, a switching lever portion including an interlock terminal that brings the power supply circuit into a closed state when being in a state of conduction with a second terminal of the connector, and brings the power supply circuit into an open state when being in a state of non-conduction with the second terminal of the connector, and a power interruption portion that brings the interlock terminal 32 of the switching lever portion into a state of non-conduction with the second terminal to bring the power supply circuit into an open state by using an actuator that is operated in accordance with a collision detection signal for a vehicle.