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userbinator 1 days ago [-]
Just like the periodic news about a new study on a method that makes batteries last effectively forever, this is unlikely to be implemented.
wolfi1 1 days ago [-]
the problem is rather to automate this and upscale this and I'm not sure how safe this method is. generally speaking if the EU makes battery recycling mandatory it definitely would benefit from a method where you don't have to grind the battery. I see this more as a PoC which can be further explored
sandworm101 19 hours ago [-]
Oldschool lead-acid batteries need not be destroyed to be recycled. They can, and are, easily disassembled and refurbished. For all the lithium hype, lead-acid remains a valid option for non-mobile applications where storage density is not relevant.
theoreticalmal 18 hours ago [-]
Where can I get cheap recycled lead acid batteries?
I like them more the li-ion because they’re more forgiving to temperature changes and have a much lower chance of catching on fire
nabeards 17 hours ago [-]
The recycling process isn’t direct battery-to-battery. The lead from old batteries is removed, purified, dried into ingots, then sold back to battery manufacturers to make new batteries. In other words, it’s likely that every lead acid battery you buy is made from recycled batteries.
The same place you buy recycled steel and aluminum: anywhere that sells NEW products.
fuzzfactor 15 hours ago [-]
The process of dying and rejuvenation would be somewhat analogous chemically.
In this case the electrode is metallic lead and the electrolyte is water containing sulfuric acid.
The electrode-electrolyte "interphase" is a solid coating based on lead sulfate, that forms on the lead plates after extended recharge cycles. This doesn't redissolve very well during use after a while when the electrolyte has become oversaturated with lead ions, and the electrodes have been "replated" so many times. Especially when recharged from near-death.
One antique way of restoration without disassembly was to agitate the battery using an industrial vibrator to loosen up the solids, then dump out the (highly toxic lead-containing) electrolyte to physically remove as much sludge as possible. Followed by repeated filling using distilled water, agitation, and dumping until the waste water looks OK. One final fill with DI water (which acts as a very weak electrolyte at this point) and a reverse charge until an amp or two has been reached for a bit, to deplate as much oxidized coating as possible into a virgin solvent.
More agitation, dumping, rinsing, and finally replace with fresh acid.
Desperate measures for desperate times, not too economical today unless similar wastewater is already being handled in a scale that dwarfs a single battery, and fresh acid is obtained surplus or purchased at bulk pricing as well.
lightedman 15 hours ago [-]
I'm hearing in other chats that this is actually a rehash of a nonsensical recycling attempt done a couple of years ago.
So I want to ask a question. What in this study would throw the HN people off as incorrect or raising a flag? Is terminology being used incorrectly? Is data vs shown photographs not quite matching up with what is being stated? I'm no battery expert, so I'm quite curious as to why I'm hearing that this is fake from people that work directly in the battery industry (and they're not big companies, most of them are individuals providing various services, some in recycling, some in custom manufacturing, some in installation.)
dgellow 11 hours ago [-]
What are they saying?
b112 19 hours ago [-]
Yup, saw this in a documentary. A bunch of tourists were stranded on a desert island, but this professor had them re-energize them with some coconuts and bananas.
Longest 3 hour tour ever.
craniumjello 19 hours ago [-]
Tesla recycling for long time good
burnt-resistor 1 days ago [-]
This isn't really a viable technology because it requires careful invasive chemical injection into risky cell chemistries. Generally, liquid electrolyte and plastic separator NMC, LFP, and LiPo should be banned for all but hobby uses when far safer solid state cells with ceramic separators exist such as those offered by ProLogium. NMC are extremely dangerous under deflagration, and LFP create huge amounts of colorless and odorless hydrogen gas that has already blown up many improperly engineered buildings that used them and assumed they were "safe". Real solid state electrolyte chemistries tend to have much slower passivation growth than liquid chemistries.
Tade0 20 hours ago [-]
> and LFP create huge amounts of colorless and odorless hydrogen gas
Lead-acid batteries do that while being charged, so it's an engineering problem to solve, not some insurmountable challenge.
burnt-resistor 9 minutes ago [-]
> Lead-acid batteries do that while being charged
Apples and oranges strawman. In very small quantities that can be managed by simply dumping it overboard using small diameter tubing.
Watch the StacheD YT channel about the structures blown up by deflagrating LFP packs because they lacked constant igniters like Megapacks. Also, the Moss Landing LFP fire reignited after 20 months. LFP aren't anywhere close to "safe", they're just relatively safer compared to NMC.
SoftTalker 16 hours ago [-]
I'd think that the hydrogen, being much lighter than air, will accumulate at the highest point in the room. Just be sure you have a vent there?
burnt-resistor 4 minutes ago [-]
No, that's improper flammable gas management. Constant igniters need to be close to the packs to be effective to prevent creating a confined space bomb.
Tade0 14 hours ago [-]
Maybe. GP's comment about LFP is highly strange to me, as this type of batteries already passes the puncture test.
Li-poly, which are in just about every electronic device, on the other hand...
burnt-resistor 2 minutes ago [-]
Most LFP cells deflagrate under puncture releasing invisible hydrogen gas that may or may not ignite. https://youtu.be/07BS6QY3wI8
LiPo packs are rarely used in consumer electronics, they're mostly used in toys and drones as individual pouch packs. NMC is the most common battery chemistry used in consumer electronics.
rcostin2k2 15 hours ago [-]
An so, soon you'll be able to put a hydrogen cell into the system ...
Good rundown of the process here: https://batterycouncil.org/battery-facts-and-applications/ho...
In this case the electrode is metallic lead and the electrolyte is water containing sulfuric acid.
The electrode-electrolyte "interphase" is a solid coating based on lead sulfate, that forms on the lead plates after extended recharge cycles. This doesn't redissolve very well during use after a while when the electrolyte has become oversaturated with lead ions, and the electrodes have been "replated" so many times. Especially when recharged from near-death.
One antique way of restoration without disassembly was to agitate the battery using an industrial vibrator to loosen up the solids, then dump out the (highly toxic lead-containing) electrolyte to physically remove as much sludge as possible. Followed by repeated filling using distilled water, agitation, and dumping until the waste water looks OK. One final fill with DI water (which acts as a very weak electrolyte at this point) and a reverse charge until an amp or two has been reached for a bit, to deplate as much oxidized coating as possible into a virgin solvent.
More agitation, dumping, rinsing, and finally replace with fresh acid.
Desperate measures for desperate times, not too economical today unless similar wastewater is already being handled in a scale that dwarfs a single battery, and fresh acid is obtained surplus or purchased at bulk pricing as well.
So I want to ask a question. What in this study would throw the HN people off as incorrect or raising a flag? Is terminology being used incorrectly? Is data vs shown photographs not quite matching up with what is being stated? I'm no battery expert, so I'm quite curious as to why I'm hearing that this is fake from people that work directly in the battery industry (and they're not big companies, most of them are individuals providing various services, some in recycling, some in custom manufacturing, some in installation.)
Longest 3 hour tour ever.
Lead-acid batteries do that while being charged, so it's an engineering problem to solve, not some insurmountable challenge.
Apples and oranges strawman. In very small quantities that can be managed by simply dumping it overboard using small diameter tubing.
Watch the StacheD YT channel about the structures blown up by deflagrating LFP packs because they lacked constant igniters like Megapacks. Also, the Moss Landing LFP fire reignited after 20 months. LFP aren't anywhere close to "safe", they're just relatively safer compared to NMC.
Li-poly, which are in just about every electronic device, on the other hand...
LiPo packs are rarely used in consumer electronics, they're mostly used in toys and drones as individual pouch packs. NMC is the most common battery chemistry used in consumer electronics.