Dynamic Battery Usage Limits Based on Travel and Age
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Solution Overview
Problem
Existing methods for determining usage limits for energy storage devices in electric and hybrid vehicles are conservative, potentially reducing the full-life performance potential of batteries and not fully utilizing their capacity.
Innovation Solution
A method that adjusts usage limits based on actual usage patterns, including travel distance and age, by comparing historical data to determine variations in operating parameters, allowing for more flexible and optimized adjustments to extend the battery's usage potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If usage limits are conservatively pre-set by the manufacturer to protect the battery, then battery reliability is improved, but the full-life performance potential of the battery is reduced
Solution Approach 1:
The usage limits are changed from static pre-set values to dynamic values that adapt based on actual battery condition. The system continuously monitors battery health indicators and adjusts usage limits in real-time, allowing the battery to operate closer to its actual capacity while maintaining safety margins.
Solution Approach 2:
The system implements a feedback mechanism where battery performance data is continuously collected and analyzed. Based on this feedback, the usage limits are automatically adjusted to optimize both protection and performance utilization throughout the battery's lifecycle.
2Ease of operation
If usage limits are based on predefined schema specifying increases to specific battery age, then ease of operation is improved, but the full-life performance potential is not fully utilized
Solution Approach 1:
The system transitions from static age-based schemas to dynamic usage limit adjustments based on actual battery condition monitoring. This allows for more precise optimization of performance while maintaining operational simplicity through automated adjustments.
3Reliability
If conservative usage limits are applied, then battery damage risk is reduced, but vehicle range and performance are limited
Solution Approach 1:
Usage limits are dynamically adjusted based on real-time battery condition assessment, allowing the vehicle to operate with extended range when battery conditions permit while maintaining protective margins when risks are detected.
Solution Approach 2:
The system changes the operational parameters (usage limits) based on monitored battery health indicators, allowing optimization of vehicle range while maintaining battery protection through adaptive parameter adjustment.
Data Source
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AI summary
According to the invention there is provided a system (200) and a method for determining a usage limit for an energy storage device (102). The method comprises determining (S301) a travel parameter value or an age since manufacturing of the energy storage device. A first variation or a second variation of an operating parameter of the energy storage device based on historical data relating the operating parameter to the travel parameter is determined (S305, S307) and compared to an actual operating parameter variation. A first or a second operating parameter variation difference (dQ1, dQ2) between the actual variation and the first and second variation of the operating parameter is calculated (S309, S311). Based on the first or the second operating parameter variation difference, a usage limit adjustment is determined (S315) and used to adjust (S317) a previous usage limit.