Research on heating characteristics of lithium battery under bullet impact

Lithium battery is the preferred power for modern weapons. Considering the high energetic density of Lithium battery, it is easy to trigger deflagration after impact by bullets, fragments, or other damage elements in the battlefield environment, thus causing the serious destruction on equipment. In this study, the heating characteristics and deflagration safety of 6Ah ternary Lithium battery under impact by 5.8mm bullet were systematically investigated. The deflagration of the lithium battery with full state of charge was trigger within 0.1s after impact, and the highest temperature was measured to be 750℃. Although the single impact failed to cause the deflagration of the lithium battery contained partial capacity, the maximum temperature increased by 92.5%, and the duration of heating decreased by 72%, respectively, with the state of charge increased from 50% to 75%. Finally, based on Joule’s law, a heating-up model of lithium battery after penetration was established, and the error between the calculation and the measured value was less than 5%.