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I think they want to leave some space so that the battery can expand. Easiest way to do that is to glue it on one side and leave a bit of space on the other sid
by newaccount74 2y ago
I think they want to leave some space so that the battery can expand. Easiest way to do that is to glue it on one side and leave a bit of space on the other side.
- moffkalast 2y agoWhy not add a valve? Every cylindrical cell has one, but manufacturers seem to be allergic to adding one on lipo packs. Apparently having them swell to 5x the size and break the device casing is preferable.
- Algent 2y agoPretty sure the airtight casing is here on purpose to trap flammables gas a dying cell create. Without it it would be very unsafe to use this type of batteries.
- ClumsyPilot 2y agoA container that traps flammable gasses is called a bomb This is not usually a design goal
- hobs 2y agoNo, a container that contains flammable gasses and then destructively allows them to escape is a bomb, one that just inflates is arguably the equivalent of a self inflating pillow.
- ClumsyPilot 2y agoGasses create pressure A phone casing is not a pressure vessel This isn’t going to work
- moffkalast 2y agoI guess using cylindrical cells in power tools, laptops, electric bikes and cars, power banks, flashlights, etc. must be super unsafe then, since they all have valves that release gas instead of inflating.
- helsinkiandrew 2y agoLipo battery gas contains flammable and poisonous chemicals - including Hydrogen fluoride. Swelling slightly in normal use and occasionally rupturing is safer over-all than off gassing all the time. From wiki: > Hydrogen fluoride is an extremely dangerous gas, forming corrosive and penetrating hydrofluoric acid upon contact with moisture. The gas can also cause blindness by rapid destruction of the corneas. https://en.wikipedia.org/wiki/Hydrogen_fluoride https://en.wikipedia.org/wiki/Hydrogen_fluoride
- totetsu 2y agoOkay I’m really going to prioritize throwing away my old android devices now.
- galaxys 2y agoThrowing away is a real hassle. You often buy a new phone because the old one is broken. So data is on there but you cant turn it on. Get a drill out? Not sure I want to breath in that dust.
- meowster 2y agoMicrowave? Might be easier to avoid the fumes than the dust from drilling. Probably easier to drill outside and wear an N95 mask and goggles though.
- elzbardico 2y agoJust put a soldering iron over the epoxy on the ssd chips, get it really hot to ensure the sillicon gets heated to at least 100C and your data will be gone forever in a completely non-functional chip.
- acdha 2y agoBuy an iPhone and don’t worry about recycling it because storage encryption means it doesn’t matter. You can never plan for when you might lose a device.
- 2y ago
- chongli 2y agoA valve is a one time only device to prevent an explosion in the event of thermal runaway. It’s not going to accommodate the slight expansion and contraction which are a normal part of the charge cycle for lithium batteries. If the battery is kept under mechanical pressure in order to avoid movement (without the use of an adhesive) then there is no place for the battery to expand to. That sounds like a recipe for disaster.
- swijck 2y agoI love how they learned from their mistakes of the old macbook pro. Batteries need ability to expand ever so slightly. Same reason why cranes are able to move freely with the wind when not in use.
- corobo 2y agoHuh. I had no idea cranes are allowed to freely rotate with the wind. Makes sense, just one of those things I'd never thought about. Neat!