However, the mainstream batteries for energy storage are 280 Ah lithium iron phosphate batteries, and there is still a lack of awareness of the hazard of TR behavior of the large-capacity lithium iron phosphate in terms of gas generation and flame.
The paper studied the gas production and flame behavior of the 280 Ah large capacity lithium iron phosphate battery under different SOC and analyzed the surface temperature, voltage, and mass loss of the battery during the process of thermal runaway comprehensively. The thermal runaway of the battery was caused by external heating.
For large-capacity lithium-ion batteries, Liu et al. studied the thermal runaway characteristics and flame behavior of 243 Ah lithium iron phosphate battery under different SOC conditions and found that the thermal runaway behavior of the battery was more severe and the heat production was more with the increase of SOC.
Huang et al. analyzed the thermal runaway behavior of the 86 Ah lithium iron phosphate battery under overheated conditions and showed that there were two peaks of temperature rise rate and more carbon dioxide and hydrogen contained among gas produced when the battery was triggered thermal runaway.
Lithium iron phosphate batteries officially surpassed ternary batteries in 2021 with 52% of installed capacity. Analysts estimate that its market share will exceed 60% in 2024.
LiFePO4 is a kind of Lithium ion rechargeable battery that uses LiFePO4 as a cathode material. It is an intrinsically safer cathode material than LiCoO2 and Li [Ni0.1Co0.8Mn0.1]O2 (Jiang and Dahn, 2004) and is widely used in electric vehicles.