MG4 LFP Battery state of health

[wattmatters]

Seems like MG4 SE SR is already well ahead of the competition having had an LFP battery since 2022.

Tesla model 3 & Y standard range have been using LFP since 2021.

 

[Tuareg]

For lower capacity (bottom of the range) models, many manufacturers will use LFP as it's lower cost than NMC due to it has a larger footprint for the same energy value (lower density).

 

[T1 Terry]

It will be interesting to see if any manufacturers can overcome the power to weight and low temperature charge rate disadvantages of LFP vs. NMC.

The cynic in me thinks that manufacturers will start to use LFP more in the next few years because they are cheaper to produce. Then convince everyone that we all need to use LFP because they are inherently "so much" safer than NMC after years of telling us that NMC are safe enough!

Winston Batteries add Yttrium to the LFP mix to make LYP, it can handle being charged down to -30*C ..... no idea why anyone would leave their car and batteries out in that sort of cold, but that's for other people, not me
Sodium ion can handle -20*C to 60*C and talk of electrolyte changes to handle down to -70*C and up to 100*C, but I doubt that is all in one electrolyte mi.
I'm guessing one for the cold would go up to around +10*C and down to the -70*C, and the hot one, from 100*C down to +20*C, so the same 80*C operating range between low and high and ranges within this 80*C window anywhere in between ........

Sodium ion, being so much cheaper to produce, from far less exotic materials and doesn't have the scary name "Lithium" anywhere in it, will become the dominant chemistry in yrs to come .....

T1 Terry

 

[hojnikb]

Winston Batteries add Yttrium to the LFP mix to make LYP, it can handle being charged down to -30*C ..... no idea why anyone would leave their car and batteries out in that sort of cold, but that's for other people, not me
Sodium ion can handle -20*C to 60*C and talk of electrolyte changes to handle down to -70*C and up to 100*C, but I doubt that is all in one electrolyte mi.
I'm guessing one for the cold would go up to around +10*C and down to the -70*C, and the hot one, from 100*C down to +20*C, so the same 80*C operating range between low and high and ranges within this 80*C window anywhere in between ........

Sodium ion, being so much cheaper to produce, from far less exotic materials and doesn't have the scary name "Lithium" anywhere in it, will become the dominant chemistry in yrs to come .....

T1 Terry

Charging below 0C can be beneficial for colder climates where temps drop at night. And most people will want to charge at night due to lower rate. So this way you avoid heating the battry and avoiding additional losses.

Also good for stationary batteries if they're outside or not in heated space. For me, that'd be ideal, as my stationary battery is in an unheated shed so in wintertime bms regularly has to shutdown charging.

 

[T1 Terry]

Charging below 0C can be beneficial for colder climates where temps drop at night. And most people will want to charge at night due to lower rate. So this way you avoid heating the battry and avoiding additional losses.

Also good for stationary batteries if they're outside or not in heated space. For me, that'd be ideal, as my stationary battery is in an unheated shed so in wintertime bms regularly has to shutdown charging.

The wisdom from the laboratory accelerated testing people, standard LFP cells are damaged charging them below 0*C, they need to have an electrolyte that is mixed to suit the lower temperatures, but then the upper temperature is also reduced ...... You can draw power out of them below 0*C because they will self heat, the trade off is lost capacity and a reduced energy draw until the battery warms up ......

T1 Terry