Samsung NMC vs LFP Lithium Pros and Cons

somfas · 01-20-2023, 02:57 PM

I am looking at a pack using Samsung cells. A lot of places are saying that the LFP batteries will last much longer than the NMC. But of course, some are saying that is not true. Anyone on here have strong opinions on using one or the other? Or have any knowledge of the Samsung batteries?

Pat911 · 01-20-2023, 04:01 PM

Samsung are very good batteries, some of the best available.

On paper LiFePO4 has a longer life than NMC, but it will always come down to how well you treat your cells. Treated well, NMC will last a long time, 2000+ cycles.

LiFePO4 is also safer to use than NMC and doesn’t experience thermal runaway as easily as NMC. Make sure you know what you’re doing with NMC as the BMS wiring and configuration must be spot on for the pack to be safe to use.

NMC has a higher energy density and higher current delivery than LiFePO4.

There are other differences but these are the main ones.

Do you have specs on the pack you’re considering?

I use NMC in my cart by the way.

Cheers
Pat.

augiedoggy · 01-20-2023, 05:10 PM

^ I agree with everything Pat Said.. NMC is smaller size for the same output but they are also the type of chemistry you see thats responsible for the negative EV car fire press and memes on social media.

That said I have tons or NMC 18650 batteries I have harvested from old laptops and Ive made battery packs for all sorts of things with them. Ive never had an issue and Ive even brought many back from the dead which is NOT recommended with larger cells.
Many phones use nmc batteries too and they are safe enough to carry in our pockets (well except for the samsung S7 fiasco a few years back).
lifepo4 has a much longer life if used at a lower c rate of discharge like for solar... when used in EVs the lifespan of each becomes more comparable from what ive read.

somfas · 01-20-2023, 06:35 PM

A friend of mine knows a guy that builds Samsung packs. New Samsung factory built packs. 22s 80v 94ah 7.6kwh.

somfas · 01-20-2023, 06:39 PM

battery pack.png

augiedoggy · 01-20-2023, 08:09 PM

Quote:

Originally Posted by somfas

Attachment 234850

I recognize the JK bms... decent quality but I didnt think they made them in a high enough continuous amp rating for a golf cart. EDIT I did some checking and the largest bms of that type can handle 200amps RMS and 350 max peak which is fine for a stock or mildly modified cart. looks like a well thought out built pack.

Volt_Ampere · 01-20-2023, 09:20 PM

Ezgo Lithium carts that I have seen come with Samsung packs. Samsung makes very good 18650 batteries - I use them in my RC stuff.

01-20-2023, 02:57 PM	#1
somfas Gone Wild Join Date: Sep 2012 Posts: 245	Samsung NMC vs LFP Lithium Pros and Cons I am looking at a pack using Samsung cells. A lot of places are saying that the LFP batteries will last much longer than the NMC. But of course, some are saying that is not true. Anyone on here have strong opinions on using one or the other? Or have any knowledge of the Samsung batteries?
somfas Gone Wild Join Date: Sep 2012 Posts: 245

01-20-2023, 04:01 PM	#2
Pat911 Gone Wild Join Date: Dec 2020 Location: Melbourne, Australia Posts: 1,947	Re: Samsung NMC vs LFP Lithium Pros and Cons Samsung are very good batteries, some of the best available. On paper LiFePO4 has a longer life than NMC, but it will always come down to how well you treat your cells. Treated well, NMC will last a long time, 2000+ cycles. LiFePO4 is also safer to use than NMC and doesn’t experience thermal runaway as easily as NMC. Make sure you know what you’re doing with NMC as the BMS wiring and configuration must be spot on for the pack to be safe to use. NMC has a higher energy density and higher current delivery than LiFePO4. There are other differences but these are the main ones. Do you have specs on the pack you’re considering? I use NMC in my cart by the way. Cheers Pat.

01-20-2023, 05:10 PM	#3
augiedoggy Gone Wild Join Date: Apr 2008 Location: Western NY Posts: 2,296	Re: Samsung NMC vs LFP Lithium Pros and Cons ^ I agree with everything Pat Said.. NMC is smaller size for the same output but they are also the type of chemistry you see thats responsible for the negative EV car fire press and memes on social media. That said I have tons or NMC 18650 batteries I have harvested from old laptops and Ive made battery packs for all sorts of things with them. Ive never had an issue and Ive even brought many back from the dead which is NOT recommended with larger cells. Many phones use nmc batteries too and they are safe enough to carry in our pockets (well except for the samsung S7 fiasco a few years back). lifepo4 has a much longer life if used at a lower c rate of discharge like for solar... when used in EVs the lifespan of each becomes more comparable from what ive read.

01-20-2023, 06:35 PM	#4
somfas Gone Wild Join Date: Sep 2012 Posts: 245	Re: Samsung NMC vs LFP Lithium Pros and Cons A friend of mine knows a guy that builds Samsung packs. New Samsung factory built packs. 22s 80v 94ah 7.6kwh.
somfas Gone Wild Join Date: Sep 2012 Posts: 245

01-20-2023, 06:39 PM	#5
somfas Gone Wild Join Date: Sep 2012 Posts: 245	Re: Samsung NMC vs LFP Lithium Pros and Cons battery pack.png
somfas Gone Wild Join Date: Sep 2012 Posts: 245

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01-20-2023, 09:20 PM	#7
Volt_Ampere Gone Wild Join Date: May 2012 Location: Rio Verde, Az Posts: 7,190	Re: Samsung NMC vs LFP Lithium Pros and Cons Ezgo Lithium carts that I have seen come with Samsung packs. Samsung makes very good 18650 batteries - I use them in my RC stuff.

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