GM expects to pioneer a new “groundbreaking” EV battery technology

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Good to see some domestic offering. They're using less-expensive minerals like manganese instead of larger amounts of cobalt and nickel per the article.

  • GM expects to pioneer a new “groundbreaking” EV battery technology that the automaker says will reduce costs and boost profitability of its largest electric SUVs and trucks.
  • GM says lithium manganese-rich (LMR) prismatic battery cells will be used in its EVs beginning in 2028.
  • The new batteries and packs utilize more-prevalent, less-expensive minerals and are lighter and more cost-effective.

"GM is targeting the new batteries and chemistry inside them — called lithium manganese-rich (LMR) prismatic battery cells — to be used in full-size electric vehicles such as its Silverado and Escalade IQ beginning in 2028.

LMR batteries have been around for decades, but they’ve historically offered a far shorter lifespan, according to Sam Abuelsamid, vice president of market research at auto advisory firm Telemetry.

It’s a problem GM believes it has solved with its LMR batteries, which are being developed in partnership with LG Energy Solution."

"50% fewer parts as well as a significant reduction in the number of modules, or cell cases, inside the vehicles’ battery packs, GM said"

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Here’s the official GM press releases.

It sounds like these LMR batteries are kind of a middle ground between NMCA (Nickel, Manganese, Cobalt, Aluminum) and LFP. Cheaper than NMCA, but more energy dense than LFP.

https://news.gm.com/home.detail.html/Pages/news/us/en/2024/nov/1125-f1.html

https://news.gm.com/home.detail.htm...may/0513-LMR-batteries-outlook-EV-market.html

Ford recently announced their LMR battery plans too.

https://fordauthority.com/2025/04/ford-announces-breakthrough-with-lmr-battery-chemistry/
 
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Cool.

LG developed its version of a previously tried chem, and made improvements.

GM is going to license it and build a new battery with different architecture and hopefully with the two working together they will get it right.

The picture used from 2021 has nothing to do with the article.

I'll be interested in the second version of it if the first proves worthy.
 
I always love seeing more battery options on the market. I'm curious to see how these do.
Yeah, that is the wild card. Until proven I rather not be a "test subject" until they get any wrinkles that may come about, fixed. :)
It would be nice if they get it right the first time.
Development takes time. Incremental gains for the win!
 
I'll be happier when batteries are designed to be rebuildable rather than hearing about new chemistries.
That’s exactly what the Ultium generation EVs from GM are. Every single Ultium-generation EV (except CELESTIQ) uses the exact same battery module. The EVs use between 10 and 24 modules, and you can relatively easily swap out failed modules with good, new or used modules.

These will be the most serviceable used EVs for the foreseeable future. Used modules will be very easy to find.
 
That’s exactly what the Ultium generation EVs from GM are. Every single Ultium-generation EV (except CELESTIQ) uses the exact same battery module. The EVs use between 10 and 24 modules, and you can relatively easily swap out failed modules with good, new or used modules.

These will be the most serviceable used EVs for the foreseeable future. Used modules will be very easy to find.

Im curious to see how easy this is.

It seems like a great idea.

Im wondering what the effect is of swapping a new pack into an old tray.
It would seem the new pack would be forced into the existing degraded packs voltage profiles.

Maybe thats ok if you at the stage of replacing a pack?
 
Im curious to see how easy this is.

It seems like a great idea.

Im wondering what the effect is of swapping a new pack into an old tray.
It would seem the new pack would be forced into the existing degraded packs voltage profiles.

Maybe thats ok if you at the stage of replacing a pack?
That’s my guess too. You might need a module with a similar amount of wear/usage/voltage (for lack of a better term) compared to the old one.
 
That’s my guess too. You might need a module with a similar amount of wear/usage/voltage (for lack of a better term) compared to the old one.

That could be worse as an older one might have an even narrower window, and overheat if it's depleted enough to be under the rest of the pack - where a newer one just " falls" to the level of the older ones- meaning this scheme works just like replacing any battery in any other multi unit bank.

It remains to be seen how close GM can keep these cells in balance after 50-100K.
 
Ya'll would call me an early adopter though too. I think I was late to the party.
Heck, I bought the '18 Model 3 Mid Range believing Tesla would be belly up any day. Everyone did! Ended up loving the car and being sold on it. Still shoulda bought stock... That $52K OTD price would be well over $700K today... Sheesh! That was one expensive car!

Good news is, I did invest in TSLA years ago and that has shown about a 150% ROI. But it sure ain't $700K!
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That’s exactly what the Ultium generation EVs from GM are. Every single Ultium-generation EV (except CELESTIQ) uses the exact same battery module. The EVs use between 10 and 24 modules, and you can relatively easily swap out failed modules with good, new or used modules.

These will be the most serviceable used EVs for the foreseeable future. Used modules will be very easy to find.
Unless there are numerous aftermarket alternatives, like there are for normal ICE 12V car batteries, then this really isn't helpful all that much. We non non-proprietary fixes that won't be discontinued.
 
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