New MG4 EV (2026 facelift) - Now on MG website

[tsedge]

Sorry Tom but Terry is right ... the accepted definition of thermal runaway is where the fire is driven by self-combustion. With an LFP fire, throw over a fire blanket and it'll go out quite quickly - with an NMC fire a fire blanket will do little, as the Cobalt in the NMC chemistry will generate Oxygen as it burns, so self-combusting and maintaining (if not accelerating) the fire.

You are both incorrect: thermal runaway can occur and cause a fire whenever there is oxygen present in the environment (whether self-generated in the chemistry or ambient). The result can still be fire although the intensity is far greater when oxygen is produced by the chemistry.

LFP batteries can burn.

 

[siteguru]

LFP batteries can burn.

Nobody is disputing that ... it seems we disagree on the definition of Thermal Runaway, as it applies to battery technology.

 

[tsedge]

Nobody is disputing that ... it seems we disagree on the definition of Thermal Runaway, as it applies to battery technology.

Indeed.

 

[tsedge]

For example:

https://www.sciencedirect.com/science/article/pii/S2352152X25019334

 

[LenEV2016]

China has banned any chemistry battery that can self combust, in other words, make it's own oxygen when thermal runaway occurs, and chemistry with cobalt in the mix is going to suffer this problem.
Unless you know of a company that can compete on price and manufacturing volume that isn't in China, then I'll accept defeat yet again.

Sodium ion does not suffer with low temp problems, down to -40C, NMC or any of the ternary lithium ion cells or LFP suffer loss of capacity and shorter cycle life operating in these low temps.
View attachment 43542

As you can see, Na+ (Sodium ion) out performs the 3 chemical mix lithium cells in capacity retention and discharge rate, NMC is on the extinct battery chemistry list .....

T1 Terry

Not disagree with anything you are saying but can't find anything to say the have banned NMC batteries, I can see that there is a decline in sales but they are still the battery of choice for premium long range cars

 

[Bam Bam]

Not disagree with anything you are saying but can't find anything to say the have banned NMC batteries, I can see that there is a decline in sales but they are still the battery of choice for premium long range cars

I think it is more that they have higher fire standards, not that they are banning on the basis of chemistry directly. Chemistry wouldn't matter if it met the standards.