MG4 Long Range Battery Chemistry

[HazardLights]

Hi,


I have been reading papers on batteries recently and have been pondering what they tell me about the likely characteristics of the NMC battery in my MG4. Can anyone tell me?

1. Does the NMC battery use a single crystal cathode?
2. What is it's chemistry? For example is it NMC532, NMC811 or another mix of Ni, Mn and Co.

I have seen comments that suggest it is SC-NMC532 but I don't know if this is a fact and I have struggled to find source material.

Thanks,
HazardLights

 

[siteguru]

As far as I know the batteries come from BYD. (But I may be misremembering).

 

[tsedge]

MG gets batteries from CATL.

 

[Rapax]

They are made by CATL or joint venture of CATL/SAIC.

 

[siteguru]

Just call me Hilary Clinton ?

 

[HazardLights]

@MoDolph do you happen to know? I bet you do

 

[MoDolph]

@MoDolph do you happen to know? I bet you do

As far as I can tell it is NCM 523. There was a presentation by MG at some point:

I have no idea about the single crystal electrode material. I hope it is but haven't found any evidence yet. The thing is that CATL will have technology that they will want to keep secret so I guess we'll never find out exactly what they are using.

 

[HazardLights]

@MoDolph Excellent. Thank you. Based on this and the reasonable assumption that MG wouldn't change the battery chemistry without announcing an "improvement" on a new model year's performance it looks like LR/ER batteries benefit from moderate Nickel content. If we knew that we had CATL's single crystal cathodes then we could be confident that charging above 75% for longer journeys has negligible impact on the battery. I am already encouraged enough that I can relax and charge to 100% before long journeys even if doing more than one a month.

 

[tsedge]

I've done nearly 20,000 miles in mine over 20 months. Been doing regular long trips charging to 100% every 2-3 weeks for most of that. Also had a 4 month period with no AC charging where I was only DC rapid charging to 90-95% every few days.

No ill effects detected. Range seems unchanged from new.

 

[kenneth104]

NMC532+1

The battery cells come from CATL and are assembled by ECON, a company invested by SAIC