(312a) Progress in Electro Acoustic Signal Analysis
- Conference: AIChE Annual Meeting
- Year: 2016
- Proceeding: 2016 AIChE Annual Meeting
- Group: Transport and Energy Processes
- Time: Tuesday, November 15, 2016 - 8:30am-9:00am
Because a closed cell is effectively a mass redistribution reactor, and in a standard cell the volume is effectively fixed, the distribution of density within a battery must change as a function of state of charge and, along with density, the bulk moduli of the anode and cathode changes as well. The shifts in density and modulus also change the acoustic attenuation in a battery
In this presentation we will review the physical basis of our hypothesis and present progress in 1) correlating structural evolution and failure analysis with acoustic signal evolution, 2) present preliminary inverse models which describe the changes we see in the acoustic/state of charge response and 3) present â??physics freeâ? machine learning results to examine the uniqueness of an acoustic signal for a given battery in a given state of charge and health.