Current Sensor Plate Terminal Vibration Resistance
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Solution Overview
Problem
Conventional current sensors integrated with battery terminals face challenges in ensuring adequate resonance resistance performance against vehicle vibrations.
Innovation Solution
A current sensor design featuring a conductive battery terminal portion with a pair of plate-shaped portions embedded in an insulating housing, where the sensor unit includes a shunt resistor electrically connected to one of the plate-shaped portions, providing improved resonance resistance against vehicle vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current sensor is mounted on a vehicle, then it can detect current in real-world conditions, but it suffers from inadequate resonance resistance performance against vehicle vibrations
Solution Approach 1:
The battery terminal portion is divided into a pair of separate plate-shaped portions (first and second plate-shaped portions) that are spaced apart from each other in the first direction. This segmentation prevents the terminal from acting as a single large resonant structure, thereby reducing vibration amplitude and improving resonance resistance performance while maintaining electrical conductivity and current detection capability
Solution Approach 2:
The plate-shaped portions are arranged facing each other in the first direction (vertical arrangement) rather than extending in a single continuous path. This spatial reconfiguration in multiple dimensions changes the mechanical resonance characteristics and reduces vulnerability to vehicle vibrations while preserving the electrical circuit functionality
2Reliability
If a robust housing structure is used to improve vibration resistance, then resonance resistance improves, but manufacturing complexity and cost increase
Solution Approach 1:
The housing contains spaced-apart plate-shaped portions that create natural vibration isolation without requiring complex internal structures or additional damping components. The simple segmented design is easy to manufacture while achieving improved resonance resistance
Solution Approach 2:
The invention achieves vibration resistance by changing the geometric parameters of the terminal structure (spacing, plate shape, arrangement) rather than modifying material properties or adding complex structural elements. This approach maintains manufacturing simplicity while improving resonance resistance performance
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 design effectively suppresses amplitude and shifts the resonance frequency to a higher range, ensuring appropriate resonance resistance performance against vehicle vibrations while maintaining cost-effectiveness and manufacturing simplicity.
Implementation Method 1
a sensor unit 4 that is located side by side with the battery terminal portion 2 along a second direction that intersects the first direction and is electrically connected to the battery terminal portion to detect a current
Data Source
AI summary
A current sensor includes a battery terminal portion that is conductive and is fastened to a battery post that extends along a first direction; a sensor unit that is located side by side with the battery terminal portion along a second direction that intersects the first direction and is electrically connected to the battery terminal portion to detect a current; and a housing that has an insulating property and embeds the sensor unit, in which the battery terminal portion includes a pair of plate-shaped portions, and the pair of plate-shaped portions are embedded in the housing with end portions on the sensor unit side in the second direction spaced apart from each other along the first direction.