this post was submitted on 04 May 2024
863 points (99.2% liked)
Technology
59605 readers
3458 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Only thing I've seen that has worried me about them is how they seem to have turned a fire hazard into an explosive hazard in terms of battery safety.
Can you elaborate on that? I was just reading the data sheet for these batteries, and these are tested with a ballistic penetration test, resulting in no fire.
I'm presuming this concern is from watching videos of elemental sodium reacting with water, which stands to reason, but I've not heard of exploding batteries
Just my impression on seeing videos of these tests on videos, which seem to result in the battery exploding violently and essentially escaping any attempt at confinement instead of catching fire. https://www.youtube.com/watch?v=W1ya_ls1zkA
Interesting. I wonder how that compares to a similar Li-ion cell. Also it's a shame there wasn't a close-up on the markings of the battery in that video to know what it is exactly. I don't imagine all cells are equal.
The battery packs from the article, for instance, are not constructed from cylindrical cells, but from large thin and flat square cells. The cathode material appears to be unique as well, as far as I can tell; who knows what's in those blue cylindrical cells.
You can look at other videos in his channel that answer your doubts. 18650 battery cells are usually connected together into battery packs and BMS, and the industrial process is pretty standardized. Just like Li-ion you can have different cell structures, but the inside remains the same.
That's way less extreme than I would've expected.
What were you expecting? It's literally an explosion. Add a few thousand of them in row in EV battery style if you want a bigger explosion.
Here is an alternative Piped link(s):
https://www.piped.video/watch?v=W1ya_ls1zkA
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I'm open-source; check me out at GitHub.
No fire could have occured during the penetration test because the resulting explosion removed all oxygen from the surrounding environment. -s
Sodium Ion batteries are nonflammable. They are safer than most of what we already use.
Guessing reading comprehension is not your forté.
I've probably read more books than you've ever smelled. So why don't you take a big whiff of farts and think on that?
And a shining personality to boot ...
What, did you expect a nice response after you replied with an attempt to insult my ability to read? You get what you pay for, dude.
Actually, you replied with just what I expected. I would have been surprised if you simply had tried to reread instead of responding as you did. Enjoy the block, buddy.