Comment on 11 INTRIGUING ENGINEERING MILESTONES TO LOOK FOR IN 2024
davidgro@lemmy.world 10 months agoMy immediate thought about that item was almost the reverse: They should do it for electric kettles in the US! Imagine having half a gallon of boiling water in like 30 seconds instead of 5 minutes or whatever it is now (and then the kettle would charge for a few hours, but still be able to heat at the normal wall outlet rate in the meantime)
DreadPotato@sopuli.xyz 10 months ago
You’d need a power output of something like 50kW to heat a gallon of water to boiling in 30sec
davidgro@lemmy.world 10 months ago
Ah, that was just making up numbers, but since those car jump start battery packs claim to have hundreds of amps (I saw one with 1,000 in a quick search) at 12V, if those numbers are real it should be totally feasible for it to dump the energy fast enough.
Since you brought it up, I might as well check the other numbers.
Doing the 30 seconds multiplication for the half gallon I mentioned (my kettle only holds 1.7 l = .37 gal anyway), that’s 208.3 Wh, which for a typical lithium 3.6V nominal voltage would be 58Ah, a lot of battery, but not unrealistic - I’m holding a power tool battery (Stihl AK30) which is 180 Wh (50 Ah)
Over the course of those 30 seconds it could also pull 12.5 Wh from the wall to slightly reduce the needed battery size.