What are the reasons for the safety of lithium iron phosphate batteries?
2 Answers
Lithium iron phosphate batteries are safe for the following reasons: 1. The P-O bond in the lithium iron phosphate crystal is stable and difficult to decompose. Even under high temperatures or overcharging, it will not experience structural collapse, heat generation, or form strong oxidizing substances like lithium cobalt oxide, thus ensuring excellent safety. 2. The cycle life of long-life lead-acid batteries is around 300 cycles, with a maximum of 500 cycles, whereas lithium iron phosphate power batteries can achieve over 2000 cycles. With standard charging (5-hour rate), they can reach 2000 cycles. Lead-acid batteries of the same quality last at most 1~1.5 years, while lithium iron phosphate batteries under the same conditions have a theoretical lifespan of 7~8 years.
With years of experience in the automotive battery field, I've found that the key to the safety of lithium iron phosphate (LFP) batteries lies in their exceptional chemical stability. The cathode material is lithium iron phosphate, a structure that resists decomposition under high temperatures or overcharging conditions, effectively avoiding thermal runaway risks. Unlike some ternary lithium batteries, which rapidly oxidize and can ignite when temperatures rise, LFP batteries have a lower voltage plateau. Even in the event of a short circuit, energy release is more gradual, significantly reducing the likelihood of explosions. From experimental data, I've observed their outstanding performance in puncture and crush tests, demonstrating high resistance to combustion and explosion. This design makes electric vehicles more reliable in extreme weather or accidents, providing greater peace of mind during daily use. Ultimately, the inherent inertness and robustness of the material are its core advantages, safeguarding both vehicles and passengers.
