Piezoelectric Sensor for Capacitor Package Deformation Detection
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Solution Overview
Problem
Conventional power supplies with electrolytic capacitors and batteries face premature failure due to environmental and operating conditions, leading to potential explosions, smoke incidents, and safety hazards, as they lack effective monitoring and protection mechanisms.
Innovation Solution
Incorporating a piezoelectric sensor into energy storage devices to detect deformation and gas buildup, issuing warnings and shutting down the power supply when critical pressure thresholds are reached, thereby preventing venting and potential failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional capacitors are designed with pressure relief structures to prevent explosions, then safety is improved, but the capacitor still vents smoke and electrolyte causing power supply failure
Solution Approach 1:
The piezoelectric sensor detects package deformation and gas buildup before the capacitor reaches a critical failure state. By issuing warnings and enabling preventive shutdowns of the power supply, the system acts in advance to prevent venting of smoke and electrolyte, thereby maintaining both safety and operational integrity.
2Device complexity
If no monitoring mechanism is implemented, then device complexity is reduced, but premature failure due to undetected gas buildup and pressure increases occurs
Solution Approach 1:
The piezoelectric sensor is integrated directly into the capacitor package, allowing the energy storage device to self-monitor its own condition. The sensor detects deformation and gas buildup internally, enabling the system to identify and respond to failure precursors without requiring external monitoring equipment, thus improving reliability with minimal added complexity.
3Productivity
If the power supply continues operating without shutdown, then productivity is maintained, but the capacitor may rupture or explode causing safety hazards
Solution Approach 1:
The piezoelectric sensor provides continuous feedback on the capacitor's package deformation and internal pressure conditions. When the sensor detects deformation exceeding a predetermined threshold indicating imminent failure, it triggers a shutdown signal to the power supply control system. This feedback mechanism allows the system to maintain productivity during normal operation while automatically preventing catastrophic failures when danger thresholds are approached.
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 prevents capacitor venting and battery rupture by detecting impending failures, reducing the risk of smoke incidents and extending the life of energy storage devices through timely shutdowns and warnings.
Implementation Method 1
a piezoelectric sensor, which generates an electrical potential in response to applied mechanical stresses is incorporated into an electrolytic capacitor
Data Source
AI summary
A method of preventing an energy storage device failure in a power supply, includes a package deformation, indicating a gas buildup and a forthcoming failure in a package wall of the energy storage device is detected. A voltage caused by the displacement of the package wall of the energy storage device is detected. It is determined whether the detected voltage is greater than or equal to a voltage threshold to indicate a slight package deformation. A warning is issued if the detected voltage is greater than or equal to the voltage threshold for the slight package deformation. It is determined whether the detected voltage is greater than or equal to a voltage threshold, to indicate a package deformation severe enough that a package breach is imminent. The power supply is shut down if the detected voltage is determined to be greater than or equal to the package breach voltage threshold.