Tech Tuesday: LiFeP04 Lithium Battery Safety

Posted November 20, 2019

Battery safety should be a major consideration for anyone looking to upgrade or purchase a new unit. Although power and longevity typically take the forefront of our decision making process it is the safety component that adds an extra level of security to a product and its longevity. LiFeP04 batteries are exceptionally stable as a result of their distinct chemistry. This means they are both safer for the user to handle and for the environment as they do not contain many of the toxic and hazardous materials that are prevalent in other batteries such as lead-acid. We hope you enjoy as Simon gives the full rundown.


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Transcript

Hi everyone! I'm Simon and this week we're diving into what makes lithium iron phosphate or LiFeP04 batteries safer than other lithium battery solutions. LiFeP04 batteries are known for their strong safety profile, the result of extremely stable chemistry. Phosphate based batteries offer superior chemical and mechanical structure that does not overheat on safe 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 LiFeP04 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 chemistry's 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. If you're selecting a lithium battery and anticipate use in hazardous or unstable environments LiFeP04 is likely your best choice. It's also worth mentioning LiFeP04 batteries are non-toxic, non-contaminating and contain no rare earth metals making them an environmentally conscious choice. Lead-acid and nickel oxide lithium batteries carry significant environmental risk, especially lead-acid, as internal chemicals degrade structure over time and eventually cause leakage. That's it for today we hope you're enjoying our Tech Tuesday episodes. Thanks for watching we'll see you next week!

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