Tesla Inc (TSLA)

[boston745]

Lithium-ion battery fires becoming much more common, fire officials say

A small fire at an industrial building in Chula Vista has raised concerns about the safety of lithium-ion batteries, following a major battery storage fire in Escondido last week that forced the evacuation of hundreds of nearby businesses.

The Chula Vista fire occurred inside a building and involved a marine boat battery. Though there was little damage, fire officials warn that incidents involving smaller lithium-ion batteries are becoming much more common.

“Any fire puts off toxic gases, and the gases from a lithium-ion battery fire are even more dangerous,” said Matt Salmon, a supervising deputy fire marshal with the San Diego Fire-Rescue Department.

Salmon explained that while electric vehicle fires are often highlighted, most lithium battery incidents involve micro-mobility devices.

Of course the vast majority of the lithium battery fires involve small devices , theres 100s of millions of them versus a few millions EVs. If EVs/hybrids ever actually replaced ICE, then there would be way more fires involving those than ICE. Its simple probability. It just so happens that hybrid fires are way more common than ICE vehicles because there are tens of millions of them or more. Spontaneous EV fires will become more common the more are sold thanks to things like EM radiation.

https://fox5sandiego.com/news/local-news/lithium-ion-battery-fires-are-becoming-much-more-common-fire-officials-say/

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How does EMF cause lithium batteries to experience thermal runaway and thus spontaneously combust? One of two main ways:

#1 - Overcharge/Discharge

With various impressed external magnetic field intensities an effect was noticed on the charge and discharge curves as well as the charge and mass concentrations within the batteries. With the two-dimensional model starting from 0mT and going to 1mT had the effect of discharging the battery faster and charging the battery faster. With the two-dimensional model starting from 1mT and going to -1mT had the effect of charging the battery faster. In either case an effect on the various characteristics of the battery were studied. With the experiments conducted on the two types of batteries the effect was more profound than subtle. Discharge times were twice as fast and charge times were equally
affected. With the smaller batteries they all generally charged faster under the presence of a magnetic field due to more uniform penetration. In the presence of the field they also discharged faster. The larger batteries would not see the same uniform penetration because only a small area of the battery sees the center of the coil it is placed on

In this dissertation, they found that external magnetic fields significantly increased charge and discharge rates in individual lithium battery cells; like shown in the following image. They also found that smaller batteries were impacted to a greater degree than larger ones. This is likely a reason Tesla is switching to larger battery cells in addition to employing magnetic attenuating honeycomb sandwich battery pack.

Thermal Runaway of Lithium-Ion Batteries Triggered by Electromagnetic Interference
https://ieeexplore.ieee.org/document/9025761

https://ars.els-cdn.com/content/image/1-s2.0-S0378775320302172-fx1_lrg.jpg

#2 - Stimulation of Dendrite Growth

Thermoelectric current causes asymmetric growth pattern of dendrites.

thermoelectromagnetic convection occurs in the vicinity of the solid-liquid interface, and vortices are generated between dendritic arms. It is shown that the thermoelectromagnetic convection has a major influence on dendritic morphology.

Quote Sources:

#1:https://digitalcommons.njit.edu/theses/1743

#2:https://www.sciencedirect.com/science/article/abs/pii/S001793101930225X