Before doing that, try watching some experiments with fireproof containers specifically designed for these fires, to have an idea how quick and violent this can be, and how bad most of these containers are at preventing it from going from 0 to inferno or to a toxic cloud suffocating you in seconds. This might or might not help you plan for the worst case, or better yet forget about doing DIY battery pack repairs at all.
I'm skeptical of the idea that some repairs are meant to be performed only by "experts" and that nobody should ever try to learn how to make them. It fuels an industry of people charging hundreds or thousands of dollars per repair to install cheap parts, and it's part of the reason our society throws so much stuff away.
Sure lithium ion packs are dangerous, but there is a manufacturing process that: welds cells together to make banks, and that sometimes produces a runaway reaction inside the cells. Given that that's the case, it should be entirely possible to do that safely in a controlled environment inside of a garage.
This is the same attitude that informs our decision not to repair garage door springs. Or more relevantly the same attitude that tells us to just use whatever async library du jour exists but never to learn about the internals of that library. "Don't worry about what's under the hood, that's dangerous stuff" says the dealer's mechanic.
I think the gatekeeping around all of this stuff from people is frankly kind of ridiculous. It's not like the battery repairmen are doing asbestos abatement naked in their living rooms while their families are watching TV. But people are treating it like the same thing.
It seems like the questions from my end bend back toward proving yourself when a situation breaks, not when it works, which is what sometimes happens when you do work yourself. Have you heard the parable of the nuclear boy scout, David Hahn?
A fundamental of expertise is knowing the terrain, what you can and can't do safely and reliably. A fundamental of knowledge is becoming aware of far more that you don't know; only in ignorance do we imagine there is little outside our personal boundaries.
Highly experienced professionals will tell me, 'I don't know how to do that, you should talk to ...', and will refuse to even venture advice. My doctor tells me to talk to a specialist. Naive, immature amatuers assure me they can do anything, and can diagnose and treat my medical condition via social media.
That is to say, yes, I can confidently exchange batteries (clean my teeth). I'm not confident in modifying those batteries with a welder/soldering iron.
If I clean my teeth and they still hurt you bet I'm going to the dentist.
That's not a rational response. Everything is dangerous. The issue is how dangerous they are.
So far I have become adept at removing and replacing my own crown, including heavily modifying when needed, filling if they aren’t too deep (or temporary fillings if they are deep) and one extraction when I was at sea and had no better choice.
I don’t recommend it if it’s not necessary, but for those who may find themselves in that situation there is a book called “where there is no dentist” that outlines most common procedures and tool use. It’s worth learning if you’re likely to be away from “civilization “. Also “where there is no doctor “ can be a lifesaver.
I think because of the infection it was quite loose, and prying a little with the elevator was all it took to get it to where it could pull it out with my fingers. If I had not had dental tools, it might have been much harder.
The pain is already really bad, yanking it out really wasn’t much worse than the steady state and once the nerves were severed it was instant reduction in discomfort.
Half a bottle of gin made it easier. The hard part was having to wait until the sea conditions were good enough that I felt like I could safely be numb-faced drunk.
Ventilation. Compartmentalization. Controlled processes with early warnings. Proper tools. Quality control. Active fire suppression. Not doing that at home with your wife, kids, and your dog.
Sure, if you know what you're doing, can deal with thermal runaway, and can trust your work afterwards, nobody stops you from doing it. I've done it myself (never tried anything larger than a e-bike battery though). Just keep in mind that you're working with a firebomb that deceptively looks like an electronic device.
Learning DYI home maintenance is not for everyone, but I sure have enjoyed it. Being comfortable with so many aspects of my house is something I really like.
The tools and technique required for dealing with stack of little fire bombs, that explode if poked, bent, or overheated, sometimes at a much later date, while sitting in your garage/living room, has a much more serious failure mechanism. And, more than that, most DIY battery packs I've seen involve lack of funds and Aliexpress cells. In the RC hobby community, everyone knows that you store DIY battery packs, especially those made with cheap Aliexpress cells, somewhere where they're free to spontaneously combust without consequence.
Battery packs are scary. People who understand that have better outcomes [1] than people who don't [2] (tbf, these are Lipo)
[1] https://www.reddit.com/r/fpv/comments/fb1u4d/thanks_reddit_y...
[2] https://www.reddit.com/r/fpv/comments/l1hegi/psa_dont_leave_...
Most vehicles are Skateboard platform anyway; I feel like you'd already have to be in at least a semi-specialized shop to even get to where you can safely FAFO with the pack...
And frankly if a normal person manages to just 'get one' and put it in their garage well I don't know what to say aside from 'sometimes natural selection has factors'...
But I don’t control what other people are doing, so, like you said, natural selection. The problem comes when that garage is adjacent to the neighbors garage, and it catches from there, that we do need to control what other people are doing.
If you're skeptical of this very banal notion than you are likely not qualified to be doing whatever work you're doing. Yes, tons of technology is needlessly complicated and the salesmen and their compatriots in the "no user serviceable parts inside" sticker division have spent a lot of time and effort to convince people that the inside of electronic devices is sacrosanct; however that has led to an IMHO dangerous notion that every instance of someone saying "hey, you really shouldn't take this apart on your home bench" is regarded with suspicion, or some notion of "they just want you to buy a new one!" and not that, sometimes things break and if they're designed well, they may well have a failure mode that prevents a much worse failure mode.
And it might be expertise that's the dividing line, but it could just as easily be a matter of the material itself: that sometimes, what's in there is pretty fucking dangerous actually and shouldn't be messed with by just any old guy, even a technical guy, who has a YouTube tutorial. It might be that the parts inside failed for a reason and replacing them, while it makes whatever thing work again, might not actually be a great idea depending on why the original ones failed and that if you don't know the answer to that question, blindly putting them back might be setting you up for something disastrous.
I'm 100% a believer in the right to repair, but I do not mean for that always to be myself. On the rare occasion I take something apart with lithium cells inside (which I avoid at all costs!), I handle them like live grenades and either re-connect them to whatever managing circuitry or, if whatever it is is beyond fixing, disposing of them safely. I don't do this because I don't understand them: I know intimately how they work. I do this because I understand them and respect the danger they pose, not unlike firearms or the parts of my car that I know I don't know enough and am not qualified to fix.
Being intelligent is, IMO, oftentimes more about knowing what you don't know and respecting that than knowing what you know.
And, as an aside just because it's related to this point I've articulated: do not take apart lithium batteries in an apartment. I don't give a shit what your qualifications are or how good your risk assessment might be, you do not have the right to take into your hands the safety of yourself and at the same time, every other person currently occupying the structure you inhabit. That is just not your risk to accept, full stop. You are not an island and all the high minded libertarian nonsense you can muster cannot get around the fact that if you make a mistake, no matter how benign in the moment, you could damn well set other people's homes on fire with zero warning for them.
or if the battery is defective, or the power goes out and you're stuck in the dark, or ...
A good analogy is the use of candles. They are pointless and fundamentally dangerous, but some people like them. People who like them even think they are calming, which is a very bad reaction to an open flame from a risk-assessment point-of view.
If i knew my neighbour liked candles, i would hope that they are being safe and accept that they have a right to take socially-acceptable amounts of risk, not berate them on the internet.
I don't see how repairing battery-containing electronics is any different. Both are unnecessary, and both could turn a small mistake into a fire.
So, I'm quite happy replacing my own phone battery with reasonable precautions, but no, friend, you may not charge your sketchy e-bike in my hallway.
The level of risk that is acceptable is socially defined, and far from the black-and-white view that some people seem to have.
Having myself witnessed a cell phone's battery go up when it was nicked during a removal, I'll take the candle a thousand times over one of those. But you know what you know.
Personally I just wouldn't fuck with re-manufactured batteries at all. Batteries should be new, from licensed factories, and they should be recycled in a way akin to car batteries so we don't lose all the lithium inside that's still perfectly good for another go-round in a new battery.
Given how popular DIY phone battery replacement is, you'd expect there to be at least a few incidents reported if it was a major risk, but I just don't see them. On the other hand london fire brigade reports 200 candle fires a year...
Someone once said 'INT is knowing how to make an Atomic bomb. WIS is knowing the implications of actual use'
That is a very dangerous point of view. Many things really are too dangerous and require too much expertise for you to do. That's how and why expertise exists - it's required to accomplish certain tasks. Not everything - not nearly everything - can be done by amatuers.
It's dangerous to you and also to people around you. The flaming lithium ion cell can kill lots of other people, or leave them in horrible pain and permanently disfigured with burns, or destroy lifetimes of memory and property.
What will you tell them? 'I thought I could do it'? Why did you try when everyone told you it was too dangerous? '...'
> there is a manufacturing process that: welds cells together to make banks, and that sometimes produces a runaway reaction inside the cells. Given that that's the case, it should be entirely possible to do that safely in a controlled environment inside of a garage.
Not unless you have millions of dollars invested in design (by experts trained and experienced in designing such facilities), equipment, and construction for your garage. And it's not near any neighbors - they don't put those factories in residential neighborhoods.
1) You need to understand how things work culturally in a country/region. SE Asia in particular does not have the same concept of mandated safety like in the US or the EU. Which makes things easy.
2) People need to stop using "domain expertise" to gate-keep other people from doing something. Yeah, batteries can be dangerous, but that does not mean you need a highly qualified and expensive person to do something trivial, like welding batteries together. If we would have gone down this path, not Intel/Apple/Google would have been born because Fairchild semiconductor had the expertise, IBM was making personal computers and everyone used Yahoo or AltaVista for search, so what would people without experience achieve, right?
When there are no alternatives or they are more expensive than DYI, DYI will always win in places like this. Do you think in Indonesia people have thousands of dollars to buy batteries like they do in other regions?
If those things don't matter, what does? Batteries?
My point being that you should not see everything through “western” eyes where life is valued more over psysical possesions.
And to answer your question: yes, cheaper batteries matter more in Indonesia than “safe” batteries. And I am pretty sure the same holds for pretty much all of SE Asia.
If you find yourself on that side of the debate, on that path, you've lost your way; you've followed the wrong people.
You do not need millions of dollars of equipment to solder battery cells together. You probably need “expert” training, meaning, like, watching a YouTube video. This stuff is not complicated.
I have disassembled several. They're all welded, not soldered.
Soldering will damage the cell. Improper welding will poke holes in the cell.
It's not rocket science but as your own comment proves, basic research is required as well as some practice welding it a safe location.
I stand by my point though, because a laser welder is not particularly expensive or exotic equipment, you can safely operate one in a garage, and you can learn to use one effectively with a little bit of practice.
Attitudes like “IT’S DANGEROUS DON’T EVEN TRY IT” are silly, and lead to people having unwarranted fear about really basic, easy-to-understand technology.
The point is to never put Lithium-ion batteries inside buildings, especially not put them inside heavy (metal) boxes bolted to the building.
Missing word?
Because I have dozens of 'em inside this building right now...
No EVs in garages or multi-storey car parks?
A quick review by me just now suggests the government regulations still have not yet caught up with the new reality in the US and EU:
EV's and large batteries inside buildings are not yet forbidden but probably will be soon.
Fire departments choose to evacuate a building with EV fires (and other industrial fires) and just let it burn out [2].
Fire departments only quench a fire by sudden rapid cooling if possible, for example by drowning [1] the entire Li-ion fire in a basin. Taking the oxygen away is not the goal.
[1] https://www.ctif.org/sites/default/files/2023-03/Putting%20o...
I design neighbourhood batteries as two shipping containers underground. In the bottom container the batteries with multiple infrared camera's looking at all battery sides and also with redundant temperature sensors. The top shipping container will deliver 60.000 liter of water into the bottom container in seconds. Testing such a setup would make for a hot and cool spectacular Mythbusters episode.
You've tested it, right?
But please, come help me do this test in real life, it will be fun!
I hope only you are at risk from these devices (and I hope you are safe too, but that's your choice). Untested technology can't be depended on. As a rule I don't believe anything works unless I see it with my own eyes - if I swap in a new patch cable, I ping something. Safety equipment for mortal risks is on a different level.
"Sounds like a sound design" isn't sufficient engineering; doing everything reasonable would include testing or using an existing tested design; and nuclear power station designs certainly are tested.
I'd like to see a reference for that, the closest I can find is this NFPA bulletin calling for updating fire protection and electrical standards for parking garages, nothing suggesting a ban.
https://www.nfpa.org/news-blogs-and-articles/blogs/2022/11/2...
https://risklogic.com/evolving-fire-safety-recommendations-f...
Really? That would more than inconvenience millions of people who already have such things. Seems most unlikely to me. Here in Norway we have about half a million EVs many of which are parked in private garages overnight and in multistorey car parks during the day. I can't recall a single incident where the battery either caused or exacerbated a problem.
Report: https://cityfire.com/wp-content/uploads/2024/01/VBB_Statemen...
> The affected Megapacks failed safely despite total loss.
Yah, some things it's best to not learn the hard way.
But if you're intent on doing it, to it outside on a concrete slab.
I watched a bunch of those videos on YouTube when I was in the market for one and ended up not buying any. The ones that were fully sealed just exploded and the ones that were vented shot 3 foot tall flames and showers of sparks out of the vents igniting everything on the ground around the container. Better to just charge the bike outside on pavement or concrete away from anything flammable.