Study of applied pressure on open circuit characteristics and capacity of lithium polymer pouch cells

This paper aims to characterize pouch cells based on the parameters external pressure, temperature & C-rate and study its effect on capacity & open circuit voltage (OCV) of the cell. Lithium batteries based energy storage devices are gaining prominence in for its role in tapping the potential of renewable energy sources and electro-mobility. For large scale energy storage applications lithium polymer pouch cells are naturally the best choice, due to its packaging efficiency & higher energy density. It is imperative to perform extensive characterization of pouch cells, to study its behavior in various operating conditions. Pouch cells are observed to expand or swell slightly due to aging. Under such conditions, when the pouch cells placed in a battery pack, there are possibilities of external pressure applied on them due to aging. Elaborate studies on the effect of external pressure characterization with temperature & varying C-rates aids in better understanding of pouch cells as an energy storage medium.