Method and System for Predicting Useful Life of a Rechargeable Battery

摘要

System and method for predicting the remaining useful life (RUL) of a rechargeable battery, such as a lithium-ion rechargeable battery. In a method, the capacity of the battery is determined based on at least changes of state of charge values estimated at a first and second time and a net charge flow of the battery and applying a particle filter to a capacity degradation formula using the determined capacity to form a capacity degradation model and determining the RUL using the capacity degradation model using a pre-defined end of service threshold. The system and method may be used to predict the RUL of a rechargeable battery in an implantable medical device.

主权项

1. A method of predicting remaining useful life (RUL) of a rechargeable battery, comprising the steps of:
(a) determining a capacity of a battery based on at least changes between a first state of charge (SOC) value determined at a first time (SOC1) and a second SOC value determined at a second time (SOC2) and a net charge flow of the battery; (b) applying a particle filter to a capacity degradation model using the determined capacity to form an adjusted capacity degradation model for the battery; and (c) predicting the RUL of the battery using the adjusted capacity degradation model with a pre-defined EOS threshold.