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research-article

Fabrication of Multi-Measurand Sensor for Monitoring of a Li-ion Battery

[+] Author and Article Information
Aaron Knobloch

General Electric Global Research KWB322 One Research Circle Niskayuna, NY 12309
knobloch@research.ge.com

Chris Kapusta

General Electric Global Research One Research Circle Niskayuna, NY 12309
kapusta@ge.com

Jason Karp

General Electric Global Research One Research Circle Niskayuna, NY 12309
karp@ge.com

Yuri Plotnikov

General Electric Global Research One Research Circle Niskayuna, NY 12309
plotnikov@ge.com

Jason B. Siegel

University of Michigan 1231 Beal Ave Ann Arbor, MI 48109
siegeljb@umich.edu

Anna G. Stefanopoulou

University of Michigan 1231 Beal Ave Ann Arbor, MI 48109
annastef@umich.edu

1Corresponding author.

ASME doi:10.1115/1.4039861 History: Received June 07, 2017; Revised March 27, 2018

Abstract

This paper details the fabrication and testing of a combined temperature and expansion sensor to improve state of charge and state of health estimation for Li-ion batteries. These sensors enable the characterization of periodic stress and strain changes in the electrode materials of Lithium-ion batteries during the charge and discharge process. These ultra-thin sensors are built on a polyimide substrate which can enable direct integration between cells without compromising safety or cell cooling design. Leveraging the sensor design and fabrication process used to create inductive coil eddy current sensors for crack detection, these sensors were characterized on three Panasonic 5 Amp-hr cells showing the capability to measure free and constrained expansion of Li-ion batteries. By sensing the intercalation effects which cause cell expansion, improvements in estimation of state of health and state of charge can be enabled through the use of more relevant physics based battery models which combine the thermal, mechanical, and electro-chemical aspects of its operation.

Copyright (c) 2018 by ASME
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