Dynamic Battery Charging Control for Lifetime Extension
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Solution Overview
Problem
Current charging systems for lithium-ion batteries fail to account for critical parameters such as state of health, composition of components, and cycle history, leading to premature aging and irreversible energy losses.
Innovation Solution
A method and system that provide time-varying charging voltages and currents, tailored to the specific state of the battery, including non-linear voltammetry, to optimize performance and extend the battery's cycling properties and lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional charging systems are used, then charging simplicity is maintained, but battery lifetime and cycling performance deteriorate due to premature aging and irreversible energy losses
Solution Approach 1:
The charging system dynamically adjusts voltage and current parameters in real-time based on the battery's state of health, composition, and cycle history. The charging profile transitions from static conventional methods to dynamic adaptation, allowing the system to optimize charging conditions while extending battery lifetime without requiring complex manual intervention.
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor battery parameters (state of health, composition, cycle history) and use this information to adjust charging voltage and current. This closed-loop control enables the system to prevent premature aging by responding to actual battery conditions rather than following fixed charging schedules.
2Duration of action of stationary object
If time-varying charging voltages and currents are implemented, then battery cycling performance and lifetime are extended, but charging control complexity increases
Solution Approach 1:
The system changes charging parameters (voltage, current, time profiles) based on detected battery characteristics. By varying these parameters dynamically rather than using fixed values, the system extends battery cycling lifetime while managing control complexity through systematic parameter adjustment strategies.
Solution Approach 2:
The system performs preliminary analysis of battery state (composition, cycle history, health status) before initiating the charging process. This preliminary action allows the system to pre-determine optimal charging parameters, reducing the complexity of real-time control while still achieving extended battery lifetime through tailored charging profiles.
3Loss of energy
If conventional charging methods are used, then charging speed is maintained, but irreversible energy losses increase leading to premature battery aging
Solution Approach 1:
The system employs periodic charging pulses with varying voltage and current characteristics rather than continuous constant charging. This periodic action reduces irreversible energy losses by allowing brief rest periods that minimize heat generation and chemical degradation, while still maintaining acceptable overall charging speed through optimized pulse sequences.
Solution Approach 2:
The system applies partial charging currents at critical stages of the charging process to minimize energy losses. By using lower currents during sensitive phases (such as when the battery approaches full charge), the system reduces irreversible heating and chemical degradation, while maintaining overall charging productivity through efficient current management.
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 method enhances battery performance by considering the battery's state of health and component composition, leading to improved cycling performance and extended useful lifetime.
Implementation Method 1
During charge and discharge, electrodes exchange ions with electrolyte and electrons with an external circuit (a load or a charger)
Data Source
AI summary
The invention provides systems and methods for charging an electrochemical device, such as a secondary electrochemical cell. Charging systems and methods of some embodiments provide charging parameters, such as charging voltage and charging current, that vary in a preselected manner as a function of time so as to enhance the overall device performance (e.g., specific capacity, discharge rate, etc.) cycling properties and useful lifetime of a secondary electrochemical cell. Charging systems and methods of some embodiments provide charging parameters, such as time varying charging voltages and charging currents, that take into consideration important electrochemical cell properties that impact device performance, cycling and lifetime, such as the state of health of an electrochemical cell, and/or the health and/or composition of specific system components such as anode, cathode, and electrolyte and/or the cycle history of the electrochemical cell (e.g., cycle number, etc.).