Optical Sensor Plating Detection in Energy Storage Devices
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Solution Overview
Problem
Metal ion plating in energy storage devices degrades performance and safety by reducing active ions, increasing resistance, and potentially causing catastrophic failures like internal shorts and fires, which existing detection methods fail to address effectively in real-time.
Innovation Solution
A system using an optical sensor with a wavelength shift responsive to internal strain, combined with current sensing and plating detection circuitry, estimates the state of charge and predicts metal ion plating events by comparing expected and measured wavelength shifts, enabling real-time detection and prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If metal ion plating is detected using conventional methods, then detection capability is limited, but device complexity and real-time monitoring capability are insufficient
Solution Approach 1:
The patent replaces conventional electrical or chemical detection methods with optical sensing technology. Fiber optic sensors measure strain-induced wavelength shifts to detect plating events, substituting mechanical/optical measurement for traditional electrical measurement approaches. This provides immunity from electromagnetic interference and enables real-time monitoring without adding significant circuit complexity.
Solution Approach 2:
The patent introduces strain as an intermediary parameter to detect metal ion plating. Instead of directly measuring plating (which is difficult), the system measures strain in the device housing or mounting structure caused by plating-induced stress. This intermediary measurement enables indirect but effective detection of plating events with high precision.
2Reliability
If real-time plating detection is implemented, then safety and device life are improved, but system complexity and cost increase
Solution Approach 1:
The patent implements a feedback-based monitoring system where optical sensors continuously measure strain, the controller compares measurements against thresholds, and alerts or shutdown commands are generated based on detected plating events. This closed-loop feedback mechanism provides real-time safety monitoring while maintaining relatively simple system architecture through threshold-based decision logic.
Solution Approach 2:
The system performs preliminary detection of plating events before they cause catastrophic failure. By continuously monitoring strain and detecting early plating signs, the system can trigger preventive actions (alerts, current reduction, or shutdown) before dendrite formation or internal shorts occur, thereby improving safety without requiring complex post-failure analysis systems.
3Measurement precision
If optical sensors are used for strain measurement, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent employs fiber optic sensors that serve multiple functions: they measure strain for plating detection, can monitor temperature through the same optical fiber, and provide immunity from electromagnetic interference. This multi-functionality reduces the need for separate sensing systems, thereby limiting the increase in overall device complexity while maintaining high measurement precision.
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
This approach allows for real-time detection and prediction of metal ion plating, improving the state of health indicators and extending the life of energy storage devices while enhancing safety by preventing catastrophic failures.
Implementation Method 1
an optical sensor disposed internally within or externally on the energy storage device and having optical output that changes in response to strain within the energy storage device
Data Source
AI summary
A system detects and/or predicts metal ion plating events of a metal ion energy storage device. The system includes an optical sensor disposed internally within or externally on a metal ion energy storage device wherein the optical sensor has an optical output that changes in response to strain within a metal ion energy storage device. A current sensor senses current through the metal ion energy storage device. Plating detection circuitry measures a wavelength shift in the optical output of the optical sensor and estimates a state of charge (SOC) of the metal ion energy storage device based on the current. An expected wavelength shift is determined from the estimated SOC. A plating event can be detected and/or predicted based on the difference between the expected wavelength shift and the measured wavelength shift.