Electromagnetic Induction Spectroscopy for Battery Dendrite Detection
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Solution Overview
Problem
Lithium ion batteries in hybrid and electric vehicles face issues with dendrite formation during charging and discharging cycles, leading to potential short circuits, which existing technologies fail to effectively detect and prevent.
Innovation Solution
A system comprising a test fixture with an integrated antenna and a detection module that performs electromagnetic induction spectroscopy to detect the electromagnetic signature of battery cells during charging and discharging cycles, identifying the presence or absence of dendrites by analyzing the generated signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection methods are used for battery cells, then the device complexity is low, but the ability to detect dendrite formation is insufficient
Solution Approach 1:
The patent combines the antenna, test fixture, and detection module into an integrated system. The antenna is mounted on the test fixture to detect electromagnetic signatures directly from the battery cell during cycling, merging the detection function with the existing test infrastructure to achieve dendrite detection without proportionally increasing device complexity
Solution Approach 2:
The patent introduces an electromagnetic signature as an intermediary indicator to detect dendrite formation. Instead of directly observing dendrites, the system detects changes in electromagnetic signatures that correlate with dendrite presence, enabling indirect but effective detection of the harmful phenomenon
2Reliability
If continuous monitoring of battery cells is implemented, then the reliability of battery performance is improved, but the use of energy increases
Solution Approach 1:
The patent enables continuous monitoring of battery cells during normal charging and discharging cycles. The detection system operates continuously without interrupting the battery's functional cycles, maintaining reliability while minimizing additional energy consumption by utilizing the existing operational energy of the battery cell
3Reliability
If early detection of dendrites is implemented, then the prevention of short circuits is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent replaces direct mechanical or physical inspection methods with electromagnetic field-based detection. The antenna detects electromagnetic signatures that change in response to dendrite formation, substituting complex physical measurement with electromagnetic sensing that is more suitable for early, non-invasive detection
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 method allows for the early detection of dendrite formation in battery cells, enabling proactive measures to prevent short circuits and ensuring the reliability and safety of battery performance over its lifespan.
Implementation Method 1
an antenna configured to detect an electromagnetic signature of the battery cell and generate a signal indicative of the electromagnetic signature
Implementation Method 2
the detection module is configured to perform electromagnetic induction spectroscopy on the signal
Data Source
AI summary
A system for testing a battery cell includes a test fixture configured to enclose the battery cell, a battery cycler configured to alternately charge and discharge the battery cell, an antenna mounted on a surface of the test fixture, the antenna configured to detect an electromagnetic signature of the battery cell and generate a signal indicative of the electromagnetic signature, and a detection module configured to receive the signal and detect characteristics of the battery cell based on the signal.