Battery Charge Control for Lithium Plating Reversal
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Solution Overview
Problem
Current battery management systems fail to effectively identify and mitigate electrochemical and electrodynamic processes within batteries, leading to issues like lithium plating and dendrite growth, which cause capacity degradation and safety concerns, due to the inability to distinguish between healthy charge transfer reactions and undesirable processes like plating.
Innovation Solution
A method that filters noisy signals from batteries to isolate correlated data associated with electrochemical and electrodynamic processes, allowing for the identification of bifurcations and chaotic behavior, enabling adjustments to charge parameters to prevent plating and dendrite formation, such as reducing charge current or generating an electric field to reverse plating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional battery management systems monitor charging processes, then basic charge tracking is achieved, but they fail to distinguish between healthy charge transfer reactions and undesirable processes like lithium plating
Solution Approach 1:
The patent replaces conventional electrical measurement methods with electrodynamic signal analysis. By analyzing electrodynamic parameters (such as voltage fluctuations, current ripple, and impedance changes) rather than just standard electrical measurements, the system can distinguish between healthy charge transfer and undesirable plating processes. This substitution enables detection of bifurcations and chaotic behavior in the electrochemical system that indicate plating onset.
Solution Approach 2:
The patent introduces electrodynamic parameter analysis as an intermediary between standard battery monitoring and plating detection. This intermediary layer processes noisy signals to extract correlated information about electrochemical processes, serving as a bridge that translates complex electrochemical behavior into actionable insights for battery management.
2Productivity
If charge current is increased to improve charging speed, then productivity increases, but lithium plating and dendrite growth are promoted causing capacity degradation
Solution Approach 1:
The patent implements real-time feedback monitoring of electrodynamic parameters during charging. By continuously analyzing these parameters and detecting bifurcations or chaotic behavior that indicate plating onset, the system can dynamically adjust charge current to prevent plating while maximizing charging speed. This feedback mechanism allows the battery management system to respond to changing electrochemical conditions during the charging process.
Solution Approach 2:
The patent transitions from static charge rate management to dynamic charge parameter adjustment based on real-time electrodynamic analysis. The system adapts charging conditions by detecting bifurcations in the electrochemical system and modifying charge current accordingly, enabling optimal charging speed while preventing plating at different stages of the charging process.
3Measurement precision
If advanced signal filtering and electrodynamic parameter analysis are implemented, then detection of plating and dendrite formation is improved, but device complexity increases
Solution Approach 1:
The patent extracts correlated signal data from noisy electrodynamic measurements by applying filtering techniques that isolate relevant information. By separating the correlated signal components (related to electrochemical processes) from uncorrelated noise, the system achieves high detection precision without requiring overly complex processing systems. This extraction approach focuses computational resources on the most informative aspects of the signals.
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 extends battery cycle life, improves capacity utilization, and enhances safety by detecting and mitigating undesirable processes in real-time, preventing irreversible damage and maintaining lithium inventory.
Implementation Method 1
initiating an electric field across the battery that reverses plating
Implementation Method 2
generating an electric field to reverse plating
Data Source
AI summary
Aspects of the present disclosure analyzing one or more signals that include both uncorrelated random signals as well as correlated information pertaining to electrochemical and/or electrodynamic processes occurring within a battery, characterizing the battery for charging, discharging, storage and other uses and/or controlling charging, discharging and other aspects of battery management based on the same.