Battery Pack SOC Window Control Using Route and Health Prediction
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Solution Overview
Problem
Existing battery management systems fail to effectively control the State-of-Charge (SOC) operating window of battery packs, leading to deterioration of battery health due to improper energy utilization.
Innovation Solution
A computer system with processing circuitry determines extended or limited SOC limits based on battery health condition and predictive energy utilization, setting a fixed operating window to optimize energy storage and utilization while minimizing health deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack operates within default predetermined SOC limits, then the health condition of the battery pack is maintained, but less energy can be stored and utilized
Solution Approach 1:
The patent implements dynamic adjustment of SOC operating limits based on real-time battery health conditions and predictive route analysis. The control system transitions from static default limits to adaptive extended or limited limits, allowing the battery to operate in extended SOC ranges when health permits and route conditions allow, thereby increasing energy utilization while maintaining health management
Solution Approach 2:
The system changes the SOC parameter limits dynamically based on battery health state and predicted energy requirements. By adjusting the SOC operating window boundaries according to health conditions and route-specific energy demands, the system optimizes the balance between preserving battery health and maximizing available energy storage
2Quantity of substance
If the battery pack operates within extended predetermined SOC limits, then more energy can be stored and utilized, but the health condition of the battery pack deteriorates
Solution Approach 1:
The system continuously monitors battery health conditions and uses this feedback to adjust SOC operating limits. Health state information feeds back to the control system, which then determines appropriate SOC window boundaries, creating a closed-loop control mechanism that prevents health deterioration while maximizing energy utilization
Solution Approach 2:
The system performs preliminary analysis of the predetermined route to predict energy requirements before operation begins. By pre-calculating energy needs and comparing them against battery health status, the system proactively sets appropriate SOC limits before the vehicle operates, preventing health deterioration before it occurs
3Device complexity
If the SOC operating window is fixed according to default limits, then the control system is simple, but energy utilization is suboptimal
Solution Approach 1:
The patent segments the SOC operating window into multiple predefined ranges (default, extended, and limited limits) corresponding to different battery health conditions and route types. This segmentation allows the control system to select appropriate operating windows based on current conditions, achieving optimized energy utilization through discrete, manageable control states rather than continuous complex adjustments
Data Source
AI summary
A computer system is disclosed. The computer system comprises processing circuitry configured to: determine operating windows of a battery pack of an electric vehicle defined by its state-of-charge (SOC) according to default predetermined SOC limits, extended predetermined SOC limits, and limited predetermined SOC limits. The processing circuitry is further configured to determine predictive energy or power utilization of the battery pack for a predetermined route. The processing circuitry is further configured to determine a health condition of the battery pack. The processing circuitry is further configured to in response to the determined health condition of the battery pack and the determined predictive energy or power utilization of the battery pack for the predetermined route, set a fixed operating window of the battery pack according to either the limited predetermined SOC limits, the default predetermined SOC limits, or the extended predetermined SOC limits.