6 ms·
Why are batteries usually glued to the body? Wouldn't just some thin rubber layer prevent whatever movement they are trying to prevent?
by qwertox 2y ago
Why are batteries usually glued to the body?
Wouldn't just some thin rubber layer prevent whatever movement they are trying to prevent?
- cupofsludge 2y agoDrop protection is one of the main reasons, especially when you use batteries with soft shells.
- ChocolateGod 2y agoSize, adhesive is thinner than any kind of physical layer surrounding it. I would presume as well it's better for thermals for allowing heat away from the battery.
- newaccount74 2y agoI 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!
- chongli 2y agoThe rubber mat is only going to work if the battery is pressed against it with a lot of force. An adhesive will hold with no pressure at all.
- Czarcasm 2y agoRubber alone would require pressure pushing the battery against the housing to maintain the battery position during a drop. This pressure against the underside of the display module would mess with the display. Adhesive is needed because there can’t be any pressure against the underside of the display module, and the battery can’t be allowed to move even a slight amount during drop impacts.
- cubefox 2y agoIf this was true, phones with replaceable batteries would be impossible.
- londons_explore 2y agoYou can still put the battery in a box, and make it true inside the box.
- rangestransform 2y agoThe box takes up internal volume that could be used for more battery
- cubefox 2y agoIn reality, replaceable batteries aren't glued inside some sort of box. Glue simply isn't necessary. It's probably just slightly easier to use a solution with glue instead of one without glue.
- mschuster91 2y ago> If this was true, phones with replaceable batteries would be impossible. They're thicker to account for a solid plastics barrier between the battery compartment and the display backside to protect the display from the user during battery replacement. Glueing the battery to the phone backplate allows the manufacturer to skip the .5mm of plastic.
- deleted 2y ago[deleted]
- chakintosh 2y agoMy guess is that even the tiniest movement would wear out the battery's casing.