- cross-posted to:
- technology@lemmy.world
- hackernews
- cross-posted to:
- technology@lemmy.world
- hackernews
" CATL has thrown its hat into the ring with the Naxtra sodium-ion battery, with 175 Wh/kg and 10,000 lifetime cycles along with operation from -40°C to 70°C. CATL is planning a start-stop battery for trucks using the technology. It has the potential to replace lead-acid batteries. CATL has announced battery pricing at the cell level in volume at $19/kWh. "
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For anyone wondering what “10,000 lifetime cycles” means, it’s full charge / discharge to the point that the batteries are at 80% of original capacity so 10,000 is to me an absolutely incredible number.
A typical phone battery is rated for about 500 (you can massively improve this by not charging it beyond 80%).
A typical phone battery is rated for about 500 (you can massively improve this by not charging it beyond 80%).
This 80% thing is incredibly simplified and not even always accurate. Personally I charge to about 95% and my phone batteries remain at 98-100% condition after 2 years of everyday use.
Limiting yourself to 80% doesn’t really make sense. You’re losing 20% capacity instantly, instead of losing it slowly over a few years. To be fair, a lot of people treat their devices so poorly that they may hit the 80% in less than 12 months, so I guess there’s that.
This also means that, when you buy a car with say a 500 km range, that the battery will last for 10,000 x 500 = 5 million kms. That is an absolutely insane number compared to cars that are on the road right now. And one you will obviously only reach if the rest of the car can keep up. EVs are already doing well compared to ICE cars in this regard, but this is almost an order of magnitude larger than the current status quo.
Also, considering that modern cars are considered totaled by basically any accident, it’s not going to be the limiting factor on the car’s lifetime. It’s mostly a talking point by ICE advocates who stealthily imply million km cars are typical.
I don’t know if the same applies to sodium batteries, early indicators are that they are less sensitive to depth of discharge as a degradation driver.
Still, the expected lifetime is going to be at least between 4-8 times NCM (traditional li-ion), which is massive.
This is what I’ve been waiting for as residential battery solution. Really nice to see it starting to take off.
Now, if we can just get the robber barons and their wholely-owned politicians out of the way of progress…
The price 🤯👀
Especially for residential/static storage, where energy to weight ratio isn’t as important.
Yep
if i can afford one, i’ll buy a car with it. but if i can’t, i’ll keep using my 04 nissan.
If I recall well, it isn’t a good fit for cars as it energy density per weight isn’t as good. But for residential batteries, that’s huge (if true).
This isn’t true any more, and it’s mentioned in the article. Sodium is at least equivalent to - and on pace to surpass - the energy density of Lithium. It’s already being used in passenger cars in the Far East.
It’s unlikely you will see a car powered by those in near future if ever as they have relatively low density. But you’ll definitely see those as home battery and such where size/density doesn’t matter that much. And I bet it’s less inflammable as well.
Edit: ha, I stand corrected, there are cars powered by these but don’t expect huge range.
honestly, I’m fine with a lower range. when i go into the office , it’s 15 km away from my house. i can charge up at home, drive to work, come back and charge it up for the next day, so as a daily driver it might be fine. The problem comes when I want to go on a road trip, which is my preferred method of going medium to long distance. I avoid flying like the plague, and trains are really expensive for some reason.
Per the edit, range will probably be fine. Na batts are already reaching the energy density of Li batts in EVs right now. It just takes a while for a new battery on an assembly line to get into actual car models. We’re not really waiting on any breakthroughs anymore.
In China NMC isn’t really used any more as a battery chemistry, almost all cars have LFP batteries. Sodium-ion has a slightly higher energy density than LFP. So basically almost all cars except the really expensive ones with a ridiculous range should switch over to sodium-ion pretty soon.
It’s still roughly half of the NMC. I wonder what’s the charging speed.
And me my '02 Mitsubishi wagon.
