Battery Pack SOC Window Switching for Energy Use and Health
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Solution Overview
Problem
Current energy storage systems in vehicles, such as battery packs, are limited by predetermined state-of-charge (SOC) windows, which restrict the utilization of available energy, leading to a need for improved powertrain control to optimize energy use while maintaining battery health.
Innovation Solution
A computer-implemented method that determines a battery pack condition level and compares it with threshold values to adjust the SOC operating window dynamically between normal and extended limits, allowing increased energy utilization when conditions permit, while ensuring battery health is maintained by limiting extended SOC operations to when the battery condition is sufficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack operates within normal predetermined SOC limits, then battery health is maintained, but energy utilization is restricted
Solution Approach 1:
The patent implements dynamic adjustment of SOC limits based on real-time battery condition assessment. The controlling apparatus monitors battery temperature, charge rate, discharge rate, and cycle count to dynamically expand or contract the operating window beyond normal predetermined limits when conditions permit, thereby increasing energy utilization while maintaining battery health through condition-based adaptability
Solution Approach 2:
The system changes the operating parameters (SOC limits) based on battery condition levels. When battery condition is good (low condition level), the system expands SOC limits to extend below normal lower limit and above normal upper limit. When battery condition deteriorates (high condition level), the system contracts limits back to normal range, optimizing the trade-off between energy utilization and battery protection
2Productivity
If the battery pack operates within extended predetermined SOC limits, then energy utilization increases, but battery health deteriorates
Solution Approach 1:
The system continuously monitors battery condition parameters (temperature, charge/discharge rates, cycle count) and uses this feedback to adjust SOC limits in real-time. The controlling apparatus calculates a battery condition level based on monitored parameters and dynamically modifies the operating window accordingly, creating a closed-loop control system that adapts to battery state changes
Solution Approach 2:
The system performs preliminary assessment of battery condition before allowing extended SOC operation. By evaluating temperature, charge rate, discharge rate, and cycle count in advance, the system determines whether the battery is in a state suitable for extended operation, preventing harmful conditions before they occur
Data Source
AI summary
A computer implemented method for controlling energy or power utilization of a battery pack in a rechargeable energy storage system is described. The battery pack is configured to be operated within an operating window defined by its state-of-charge, SOC, according to normal predetermined SOC limits, and extended predetermined SOC limits. The method includes determining a battery pack condition level; comparing the battery pack condition level with a first threshold; providing predicted energy or power utilization of the battery pack; comparing the predicted energy or power utilization with a second threshold. In response of determining that the predicted energy or power utilization is above the second threshold, and that the battery pack condition level is below the first threshold, operating the battery pack within the operating window defined by the extended predetermined SOC limits.