23/06/2023
How dangerous are Lithium Iron Phosphate batteries?
Most batteries other than the Lead acid batteries used in solar and UPS are Lithium Iron Phosphate
The chemical description is LiFePO4
For shipping they are Class 9
This means they are not Explosive, Flammable, Oxidising, Toxic, Radioactive or Corrosive and can be placed anywhere in domestic buildings.
A further safety feature of the Hubble battery is that if the load exceeds 100A, the battery goes into a self limiting state of 20 Amps for 10 minutes at a time until the short is removed.
Phosphate-based batteries offer superior chemical and mechanical structure that does not overheat to unsafe levels, thus providing an increase in safety over lithium-ion batteries made with other cathode materials. This is because the charged and uncharged states of LiFePO4 are physically similar and highly robust, which lets the ions remain stable during the oxygen flux that happens alongside charge cycles or possible malfunctions.
Overall, the iron phosphate-oxide bond is stronger than the cobalt-oxide bond, so when the battery is overcharged or subject to physical damage then the phosphate-oxide bond remains structurally stable; whereas in other lithium chemistries the bonds begin breaking down and releasing excessive heat, which eventually leads to thermal runaway.
Lithium phosphate cells are incombustible, which is an important feature in the event of mishandling during charging or discharging.
They can also withstand harsh conditions, be it freezing cold, scorching heat or rough terrain.
When subjected to hazardous events, such as collision or short-circuiting, they won’t explode or catch fire, significantly reducing any chance of harm.
LiFePO4 batteries are non-toxic, non-contaminating and contain no rare earth metals, making them an environmentally conscious choice.
Reference:
How are LiFePO4 batteries safer than other lithium batteries?
