battery chemistry

In China the 52kWh Roewe Ei5 has a LFP pack, and the 61kWh NMC according to what I can find online. You'd assume they were the same, but maybe not.
 
LFP is the same system used by Tesla, and is likely to have more charge discharge cycles than the alternative systems, less effected by temperature, so as standard ranger I'm happy with this.
 
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As far as I'm aware all UK MG5s are NMC. It's easy to check the label on the battery.
 
Petriix said:
As far as I'm aware all UK MG5s are NMC. It's easy to check the label on the battery.
Click to expand...
Would be handy to know how you tell as that statement refers to LR as far as I know the Standard range are LFP.
 
From what I can gather LFP batteries are far superior in terms of cycles (3000 approx. to 80% capacity), safety and charging efficiency (up to 50% at higher voltage) but that they work better at higher temperatures and performance suffers at lower temperatures.

NMC batteries don't last as long (1000 cycles approx. to 80% capacity, are not as efficient recharging, but do work better at colder temperatures.
 
Ozzie1989 said:
From what I can gather LFP batteries are far superior in terms of cycles (3000 approx. to 80% capacity), safety and charging efficiency (up to 50% at higher voltage) but that they work better at higher temperatures and performance suffers at lower temperatures.

NMC batteries don't last as long (1000 cycles approx. to 80% capacity, are not as efficient recharging, but do work better at colder temperatures.
Click to expand...
Can you explain cycles please, as I may be misunderstanding. I thought that a cycle was discharge and recharge.
So if someone with NMC batteries, such as the Kate and James guy with his 5, charges their car every night after a day's work then the battery will last 3 years (1000 cycles)??
 
www.onecharge.biz

New Tests Prove: LFP Lithium Batteries Live Longer than NMC - OneCharge

Recent independent degradation tests of commercial lithium batteries prove - LFP chemistry is safer and has a longer life-span than NMC.
www.onecharge.biz www.onecharge.biz

Recent independent degradation tests of commercial lithium batteries reveal a big surprise! Contrary to the claims of many NMC-based lithium battery manufacturers, LFP chemistry is superior compared to NMC – it is safer, offers a longer lifespan, and is generally less expensive than NMC, NCA.

As a default, both NMC and LFP chemistries’ useful life can range between 3,000 to 5,000 cycles. However, with opportunity charging, that can be increased significantly, anywhere up to 7,000 cycle count.

Just one specialist opinion not mine,
 
My experience (so far) with NMC batteries (after 2 EV's) is good, both maintained 100% including current 30kw leaf with 30k on clock and 5 years old. They have been charged almost exclusively on home 7kw charger, usually to 100%.
 
Well sorry all for miss leading anyone I should of looked my Standard Range 5 has NCM batteries I guess this is the same as NMC. Looks like we are all in the same boat, expect the batteries to start degrading after 2-3000 charge cycles 6-7 years typically. Who will still have their ev in 7 years time.
 
Not sure but I doubt I'll reach 2000 cycles in that time - that's a bit under 300 times a year, so getting on for every day, for 7 years, way more than I'm likely to do.

I'd suspect that not a lot here will still have their same car in that time anyway. People who are sufficiently motivated (and affluent enough) to get a new car tend to do it more than once.
 
Gomev said:
Can you explain cycles please, as I may be misunderstanding. I thought that a cycle was discharge and recharge.
So if someone with NMC batteries, such as the Kate and James guy with his 5, charges their car every night after a day's work then the battery will last 3 years (1000 cycles)??
Click to expand...
That was number of cycles from 0% to 100% which brought it down to 80% capacity left (the usual measure for battery lifetime in EVs).

I'm very interested to see how long Kate and James battery lasts, but it will be more than 3 years before they reach 80% effective as they are not going 0-100 (due to the buffer).
 
I'm a taxi driver. I charge my LR to 100% every night. I use rapid chargers during the day when I can, and a timed charge overnight to be at 100% for starting work on the morning. So very similar to James and Kate.

Only done 23,000 miles so far, but at the first service the SOH of the battery was 100%. Time will tell....
 

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