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From what I've read these packs have around 7000 3100mAH NCR-18650s. Over the years I've used these NCRs (or lower mAH versions) individually in special flashli
by clumsysmurf 12y ago
From what I've read these packs have around 7000 3100mAH NCR-18650s. Over the years I've used these NCRs (or lower mAH versions) individually in special flashlights - and while they seem to have good reliability overall, one did fail on me while charging. Thats why often hobbyists charge these outside in fireproof bags.
I would be terrified to drive a car with this technology.
- greglindahl 12y ago18650 is the form factor. These cells don't use the usual chemistry. Do you really think that the form factor is dangerous?
- clumsysmurf 12y agoYes, of course 18650 is the form factor. From what I understand these are stock Panasonic NCR-18650 3100 mAH batteries though. Any ideas on what "special chemistry" they are using?
- greglindahl 12y agoEvery article I've seen about the battery says that it doesn't use the usual chemistry, and that only the form factor is standard. I figured you would have something factual to say, given that you're saying you know it's dangerous.
- makomk 12y agoAll the information I've seen says they use stock Panasonic NCR-18650A lithium ion batteries just like clumsysmurf said. (The "A" just means that it's the 3100mAH nominal capacity version - there are several NCR-18650 batteries with different capacities.) It's a fairly common 18650 battery, lots of laptops use this specific model.
- clumsysmurf 12y agoI'm not sure what you are trying to do - but I almost fell for it. First, I specifically stated "3100mAH NCR-18650s" which is a specific part, not a form factor which anyone who handles these batteries would know - which was your first (confused) reply. Second, from everywhere I have read, like (1) these are just standard cells. Lastly, I was originally stating that I would feel unsafe being around this technology. I did not say "the technology is unsafe." If it makes you feel better, Tesla as a company gives me great hope and I am rooting for them. I do not have ties to anyone at all. It would have been nice if you could have simply pointed to some factual reason (like breser did above) why I shouldn't be worried. (1) http://www.greencarreports.com/news/1084682_what-goes-into-a-tesla-model-s-battery--and-what-it-may-cost http://www.greencarreports.com/news/1084682_what-goes-into-a...
- deeviant 12y agoYeah, I would be terrified of driving around in a car that's basically a metal box around a bomb ready to go, those batteries are deadly. I think what needs to be done is to build a car around many gallons of highly flammable liquid.
- clumsysmurf 12y agoI'm waiting for Mr Fusion.
- jacquesm 12y agoIt would be better if you gave a reason why you should be worried. That casing is about as fireproof as it gets and those model-s incidents where there was a fire the occupants made it out without so much as a singed hair on their legs. I'm sure given the 'right' conditions you could get a catastrophic release of energy out of a pack this size but I'm fairly certain that the occupants of the car would not be in a state where they would realize that the battery had also exploded since they'd be too distracted by evaporating themselves.
- breser 12y agoModel S is using NCA (Nickel Cobalt Aluminum). It's not clear if the stock Panasonic batteries have the same battery chemistry (they might but Panasonic doesn't share their battery chemistry), but we do know that the Tesla batteries are not exactly stock Panasonic batteries. They have casing modifications made to them for Tesla's purposes.
- clumsysmurf 12y agoThank you for the clarification.
- deleted 12y ago[deleted]
- njharman 12y agoI've set off cans of gasoline (Disclaimer: I was teenager and thus stupid). I am not terrified to drive a car with that technology.