Vehicle Cutoff Switch Resistance Monitoring for Wear Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for determining the wear of switches or circuit breakers in power systems are unreliable, as they may indicate failure when the component is still functional, leading to potential performance issues.
Innovation Solution
A vehicle cutoff device that includes a control unit to compare the resistance value of a switch with a threshold to determine degradation, notifying an external entity when the resistance exceeds the threshold, thereby enhancing durability performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the upper limit of the number of times of opening/closing of the switch is set in advance, then the switch can be operated with a predetermined lifespan, but the switch may be determined to be degraded even though it is still functional (false positive)
Solution Approach 1:
The patent changes the detection parameter from counting the number of opening/closing operations to measuring the actual resistance value of the switch. By monitoring resistance changes rather than operation counts, the system achieves more accurate degradation detection that reflects the actual physical state of the switch contacts, eliminating false positives where functional switches are incorrectly marked as degraded.
2Power
If the switch operates with high current output, then the power supply capability is improved, but the wear of the switch contact increases
Solution Approach 1:
The patent implements a feedback mechanism where the resistance value of the switch is continuously monitored and compared against a threshold. When the resistance exceeds the threshold indicating degradation, the system provides feedback to stop further operation of the degraded switch. This feedback loop allows the switch to operate at high currents throughout its functional life while automatically preventing operation once degradation begins, thereby maximizing both power output capability and contact lifespan.
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 device accurately determines switch degradation, allowing for enhanced durability by notifying external entities to take appropriate measures, thus maintaining reliable operation.
Implementation Method 1
a control unit configured to execute degradation determination processing in which a resistance value and a resistance threshold of the switch are compared
Data Source
AI summary
Provided is a vehicle cutoff device that allows a switch to be operated in a form in which the durability performance thereof is enhanced. A cutoff device includes a first switch configured to switch a power path between a conductive state and a cutoff state, the power path serving as a path to transmit power derived from a power supply unit. The cutoff device includes a control unit configured to execute degradation determination processing in which a resistance value and a resistance threshold of the first switch are compared. The control unit determines that the first switch is in a degraded state when the resistance value is greater than or equal to the resistance threshold, and notifies an external entity of the degraded state.