Adaptive Battery Usage Window for High and Low SOC Stress
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Solution Overview
Problem
Conventional limited charging methods for lithium-ion batteries extend battery longevity by avoiding high State-Of-Charge (SOC) regions but fail to address degradation in low SOC regions, particularly in next-generation batteries with Silicon anodes that experience mechanical stress during charging and discharging.
Innovation Solution
An adaptive battery usage window is implemented, adjusting the charging and discharging limits to avoid high degradation regions in both high and low SOC areas, using a battery microcontroller and machine-learning algorithms to control the SOC based on multiple limited charging modes, thereby minimizing battery degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional limited charging is used to avoid high SOC regions, then battery longevity is extended, but degradation in low SOC regions is not addressed
Solution Approach 1:
The patent divides the SOC range into multiple segments with different protection strategies. High SOC regions (above 80-90%) are protected by limiting charging, while low SOC regions (below 20-30%) are protected by preventing excessive discharge. This segmentation allows targeted protection against degradation in both high and low SOC regions simultaneously.
Solution Approach 2:
The patent implements dynamic adjustment of the usage window based on battery state, temperature, and usage patterns. The lower and upper SOC limits are not fixed but adaptively adjusted to optimize both longevity and degradation protection across varying operating conditions.
2Duration of action of stationary object
If adaptive battery usage window is implemented to avoid both high and low degradation regions, then battery longevity is extended, but device complexity increases
Solution Approach 1:
The battery management system automatically monitors SOC, temperature, and usage patterns to dynamically adjust the usage window without requiring manual user intervention. The system self-adapts to optimize battery longevity and degradation protection based on real-time conditions.
Solution Approach 2:
The patent changes the operational parameters (SOC limits, charging rates) based on battery state, temperature, and usage patterns. By dynamically adjusting these parameters, the system extends battery longevity while managing complexity through adaptive control rather than fixed rules.
Data Source
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AI summary
Methods and apparatus relating to an adaptive battery usage window to extend battery longevity are described. In an embodiment, a State Of Charge (SOC) for a rechargeable battery is controlled based on a plurality of limited charging modes that may selectively allow/prevent charging/discharging of the rechargeable battery to target level(s). Other embodiments are also disclosed and claimed.