Acoustic Resonance Switching Device for Battery Safety
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Solution Overview
Problem
Conventional battery management systems in electric and hybrid vehicles may fail to reliably disconnect the battery from the power system during accidents due to the failure of internal 12 V batteries, posing a risk to first responders and occupants.
Innovation Solution
A contactless switching device using an acoustic resonance effect to interrupt the electrical connection between the battery and current collectors, independent of the vehicle's 12 V battery, comprising a prestressed container made of fragile material that can be destroyed by targeted sound waves, ensuring safe disconnection even when conventional circuit breakers fail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrically operated circuit breakers are used to disconnect the battery, then the battery management system can control the disconnection, but the system fails when the 12 V battery fails during an accident
Solution Approach 1:
The patent replaces the electrically operated circuit breaker with an acoustically operated switching device. The switching device uses acoustic resonance to destroy a fragile container, releasing a spring element that mechanically opens the switch. This substitution eliminates dependency on the vehicle's electrical power sources, ensuring reliable operation even when the 12 V battery fails during an accident.
Solution Approach 2:
The switching device is designed to be self-activating through acoustic resonance without requiring external electrical power. The fragile container acts as a resonant element that, when exposed to specific acoustic frequencies, destroys itself to release the spring mechanism. This self-service capability ensures the disconnection function operates autonomously based on acoustic signals rather than electrical control.
2Adaptability or versatility
If an acoustically operated switching device is used to interrupt the electrical connection, then the disconnection can be achieved independently of the 12 V battery, but the device requires a new operating principle using acoustic resonance
Solution Approach 1:
The patent changes the operating parameter from electrical control to acoustic resonance. The fragile container is designed with specific acoustic properties (resonant frequency) that allow it to be destroyed by acoustic excitation. This parameter change enables the switching device to operate independently of electrical power sources while maintaining a relatively simple mechanical structure consisting of the fragile container, spring element, and switch contacts.
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 provides a reliable and safe means to interrupt high current electrical connections during accidents, protecting personnel from electrical hazards by using a contactless, sound-activated emergency switch that operates independently of the vehicle's power sources, ensuring the power line is safely disconnected even if the conventional circuit breaker fails.
Implementation Method 1
the container (12) can be destroyed by acoustic resonance
Data Source
AI summary
The present invention relates to a switching device 1 for a battery 2, the switching device 1 being activated by an acoustic resonance effect to interrupt an electric line of the battery 2 to the outside. The present invention further relates to a battery 2 having an electrically activated power switch 21 for interruption of an electric line of the battery 2 to the outside and at least one such switching device 1, the power switch 21 and the switching device 1 being connected in series.