关键词: 锂离子电池, 低温冷却, 热失控, 储能

Abstract: In order to solve the fire problem in the storage and transportation of lithium-ion batteries, a method of preventing thermal runaway of lithium-ion batteries by low temperature control was proposed, and the thermal runaway test of ternary lithium-ion batteries under low temperature cooling was carried out. The results show that low-temperature cooling can reduce the internal reaction activity of lithium-ion batteries, weaken the energy release after thermal runaway of lithium-ion batteries, and then block the chain propagation of thermal runaway between battery packs; The lower the temperature of the lithium-ion battery, the more difficult it is to have thermal runaway. When the temperature drops below -30 ℃, the directly punctured battery will not have thermal runaway; Due to the influence of low temperature, the internal material activity of the battery is reduced, the chemical reaction inside the battery is limited, and the mass loss and CO volume fraction of the battery after the test are also significantly reduced.

Key words: lithium-ion battery, low temperature cooling, thermal runaway, energy storage