Adaptive Battery Charging Circuitry Relaxation Time Control
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Solution Overview
Problem
Existing battery charging technologies fail to efficiently minimize charging time and maximize cycle life while reducing degradation mechanisms, as they do not adaptively control charging currents based on real-time battery state and relaxation times.
Innovation Solution
The development of adaptive charging circuitry that adjusts charging current characteristics, such as amplitude, duration, and rest periods, using data from terminal voltage changes, relaxation times, and state of charge to maintain optimal charging conditions within predetermined ranges, thereby optimizing charging efficiency and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant current charging is used, then charging speed is maintained, but battery degradation increases and cycle life decreases
Solution Approach 1:
The charging current is dynamically adjusted based on real-time measurement of battery relaxation time. The system transitions from static constant current charging to dynamic variable current charging, where the current magnitude changes continuously according to the battery's instantaneous state, thereby preventing degradation while maintaining efficient charging.
Solution Approach 2:
The system implements closed-loop feedback control by continuously measuring the battery's relaxation time and using this information to adjust the charging current. The relaxation time measurement provides feedback about the battery's internal state, enabling the controller to optimize charging parameters in real-time to balance speed and battery health.
2Loss of time
If high charging current is applied, then charging time is reduced, but degradation mechanisms are activated
Solution Approach 1:
The system changes the charging parameter (current magnitude) based on the measured relaxation time. By continuously monitoring relaxation time and adjusting current accordingly, the system operates in optimal parameter ranges that avoid degradation thresholds while minimizing charging time. The charging current is modulated to stay below degradation-inducing levels.
Solution Approach 2:
The charging process incorporates periodic relaxation time measurements and corresponding current adjustments. The system applies charging current in controlled intervals, pausing to measure relaxation time and reassess optimal current levels, thereby preventing continuous high-current exposure that would cause degradation.
3Productivity
If adaptive charging control is implemented, then charging efficiency and cycle life are optimized, but system complexity increases
Solution Approach 1:
The battery effectively monitors its own state through relaxation time measurement, which inherently reflects its internal conditions. This self-diagnostic capability eliminates the need for complex external sensing systems, as the relaxation time serves as a built-in indicator of battery state that directly guides charging control decisions.
Solution Approach 2:
The relaxation time measurement serves multiple functions simultaneously: it indicates state of charge, assesses battery health, and guides charging current optimization. This multi-functionality reduces the need for separate sensing systems for each parameter, simplifying the overall control architecture while achieving comprehensive battery 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
This approach reduces total charging time and increases cycle life by dynamically adjusting charging parameters to match the battery's state, ensuring efficient energy transfer and minimizing degradation, thus enhancing overall battery performance and longevity.
Implementation Method 1
a voltage relaxation is determined in the battery/cell in response to the charge/discharge pulses
Data Source
AI summary
The present inventions, in one aspect, are directed to techniques and/or circuitry to adaptively charge a battery/cell using data which is representative of a change in terminal voltage of the battery/cell. In another aspect, the present inventions are directed to techniques and/or circuitry to adaptively charge a battery/cell using data which is representative of partial and/or full relaxation time of the battery/cell. In yet another aspect the present inventions are directed to techniques and/or circuitry to determine whether the data which is representative of partial and/or full relaxation time exceeds a predetermined range and/or is greater than a predetermined value.