Thermal explosion energy evaluation on LCO and NCM Li-ion polymer batteries using thermal analysis methodology

An advanced lithium-ion polymer battery (LIPB) has higher energy density, long-life cycle, and flexible configuration that can be arbitrarily shaped. It is the mainstream candidate for electronics products as energy storage device. However, an energetic LIPB will generate an abnormal electrochemistry reaction and will even cause spontaneous ignition to the battery pack in case cells fail, such as a short circuit or thermal runaway. Two commercial 603450 LIPBs, whose cathodes include lithium cobalt oxide (LiCoO2, LCO) and lithium nickel cobalt manganese oxide (LiNixCoyMnzO2, NCM), were examined for their thermophysical data. Enhanced calorimetry methods are modified to analyse an LIPB's heat capacity and enthalpy. In case thermal runaway the heat capacity and enthalpy are 0.99 kJ g-1 K-1 and 11.76 kJ for an LCO cell and 0.96 kJ g-1 K-1 and 10.68 kJ for an NCM cell, respectively. Furthermore, TNT equivalency mass is 7.62 g for an LCO and 7.01 g for an NCM cell. An LIPB is examined to identify the fire-explosion behaviour and thermokinetic data for enhancing battery thermal management.