Office of Technology Transfer – University of Michigan

Scheduling of Battery Charge and Discharge

Technology #4442

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Categories
Researchers
Kang G. Shin
Managed By
Keith Hughes
Assistant Director, Physical Sciences & Engineering 734-764-9429
Patent Protection
US Patent Pending
Publications
Scheduling of Battery Charge and Discharge
Proc 30th IEEE Real-Time Systems Symp, in press

Background

Electric vehicles operate inefficiently with a naïve battery management system that charges or discharges battery cells (BCs) in a battery pack based solely on application load demands. Effective scheduling (cyber) of battery charge and discharge activities, by making the most of battery characteristics (physical), can extend the battery pack’s operation-time and lifetime.

Technology

Researchers at the University of Michigan have developed a set of policies and framework for scheduling battery activities. This framework extends the battery pack’s operation-time and making them robust to anomalous voltage imbalances. The evaluation of the system has shown that the scheduling framework outperforms three alternative scheduling mechanisms with respect to the operation-time 7–56%, and improves the tolerance of voltage imbalance up to 50%.

Applications and Advantages

Applications

  • Scheduling of battery charge and discharge

Advantages

  • Extend battery pack’s operation-time and lifetime
  • Improves the tolerance of voltage imbalance