Research on the influence of thermal radiation of cell phone system on the structure and safety of lithium-ion battery

We have combined simulation experiments and instance analysis to thoroughly study the influence of thermal radiation of cell phone system on its lithium-ion batteries (LIBs). Researches show that high power central processor or memory will make a thermal field (above 60 °C), which has a detrimental effect on LIBs through thermal radiation and heat transfer. The coil structure and electrode materials of LIBs would be destroyed, when LIBs close to an enhanced thermal field without effective heat dissipation. External thermal radiation usually results in the hard swelling of pouch LIBs, which can be reasonably attributed to the wrinkle of pole piece, coil structure deformation, delamination of the active materials. Serious deterioration of LIBs will occur after a long-term operation under the external high-temperature, leading to the decomposition of electrolyte, generation of Li dendrites, and separator closure. It causes of the heat accumulation of LIBs and then thermal runaway. Through this study may raise the attention to the thermal design and reliability of LIBs, improving the safety of the product.