Thermal stability evaluation of lithium-ion polymer batteries

Abstract

Lithium-ion polymer battery (LIPB) is a thin and high-aspect-ratio fabrication, which provides the high specific energy; it is widely used in consumer electronics. The calorimetry method was conducted by using an adiabatic calorimeter, vent sizing package 2, to identify the thermal runaway hazards of various state-of-charges (SOCs) on LIPB. The relationships between temperature, pressure, and time under adiabatic condition for LIPB could evaluate the safe performance characteristics. Furthermore, the measurements of thermokinetic parameters, such as apparent onset temperature (T 0), maximum temperature (T max), maximum pressure (P max), maximum self-heating rate [(dT dt −1)max], and maximum pressure rise rate [(dP dt −1)max], would rank the thermal hazards for various SOC LIPB and design the safer protective devices. The higher self-heating rate and pressure rise rate of 600 mAh LIPB at 100 % SOC were determined as approximately 7200 °C min−1 and 12,600 psig min−1, respectively. In addition, the experimental results are distinguished the thermal response from SOC levels and the loss prevention considerations provided a reference for the applications of LIPB.