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Thursday, October 3 • 2:30pm - 2:40pm
Lightning Session- Data-driven Prediction of Battery Cycle Life Before Capacity Degradation

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Data-driven Prediction of Battery Cycle Life Before Capacity Degradation
Accurately predicting the lifetime of complex, nonlinear systems such as lithium-ion batteries is critical for accelerating technology development. However, diverse aging mechanisms, significant device variability and dynamic operating conditions have remained major challenges. We generate a comprehensive dataset consisting of 124 commercial lithium iron phosphate/ graphite cells cycled under fast-charging conditions, with widely varying cycle lives ranging from 150 to 2,300 cycles. Using discharge voltage curves from early cycles yet to exhibit capacity degradation, we apply machine-learning tools to both predict and classify cells by cycle life. Our best models achieve 9.1% test error for quantitatively predicting cycle life using the first 100 cycles (exhibiting a median increase of 0.2% from initial capacity) and 4.9% test error using the first 5 cycles for classifying cycle life into two groups. This work highlights the promise of combining deliberate data generation with data-driven modelling to predict the behavior of complex dynamical systems.

Speakers
KS

Kristen Severson

Postdoc, IBM
Kristen is a post-doc in the Health Analytics Research Group within the Center for Computational Health at IBM Research Cambridge.Her current research focuses on the development and application of machine learning techniques to derive insight from real-world health data. Previously... Read More →

Chairs
avatar for Mike Berke, MS

Mike Berke, MS

Director of Research and Automation Technologies, Amgen
Mike is the Director of the Research & Automation Technologies (R&AT) group at Amgen, where he has been for the last 16 years. The R&AT group focuses on developing novel devices and software tools to improve research processes.


Thursday October 3, 2019 2:30pm - 2:40pm
Theater Ballroom (5th Fl) - Courtyard Boston Downtown 275 Tremont Street, Boston, MA 02116