SYSTEMS AND METHODS FOR DETERMINING BATTERY SYSTEM PERFORMANCE DEGRADATION

摘要

System and methods for determining performance degradation of a battery system are presented. In certain embodiments, the disclosed systems and methods may involve testing, monitoring, and/or modeling of battery system cyclic performance degradation at a single battery system operating temperature. The disclosed systems and methods may offer certain efficiencies over conventional techniques for determining cyclic degradation of a battery system. Such efficiencies may allow the disclosed systems and methods to be implemented in connection with real-time battery state estimation methods.

主权项

1. A method of determining a cyclic performance degradation rate of a battery system comprising:
receiving information indicative of total performance degradation of a battery system over a particular period; receiving information indicative of calendric performance degradation of the battery system at a plurality of operating temperatures; determining a cyclic degradation of the battery system over the particular period based on the information indicative of the total performance degradation of the battery system and the information indicative of the calendric performance degradation of the battery system; determining a cyclic degradation rate based on the cyclic degradation of the battery system over the particular period; and estimating a state of the battery system based on the cyclic degradation rate.