As ambient pressure decreases, lithium batteries trigger thermal runaway sooner, but their risk of generating high temperatures and gas shocks decreases. Under different pressure environments, the composition and content of gases produced by thermal runaway vary. Specifically, as ambient pressure decreases, the content of CO2 decreases while the content of gases such as unsaturated hydrocarbons (e.g., C4H8, C4H6, C5H10) increases, which increases the risk of explosions in low-pressure environments.