4 ms·
>Achieves 178.7 Wh/kg energy density and 8.3 kW/kg power density Can someone explain this to me please. What is “energy” measuring here? How is it different fr
by VladVladikoff 1y ago
>Achieves 178.7 Wh/kg energy density and 8.3 kW/kg power density
Can someone explain this to me please. What is “energy” measuring here? How is it different from power?
- dreamcompiler 1y agoPower is the time derivative of energy.
- taminka 1y agoyeah I'm sure that someone who doesn't understand the difference between power and energy definitely understands derivatives... you somehow managed to be perfectly unhelpful, condescending and insecure at the same time?
- lexicality 1y agopresumably energy is how much it can store and power is how fast you can get it out?
- billyjmc 1y agoEnergy is how much work you can do. Power is how fast you can do it. When you express these in terms of densities, it’s how much energy a certain quantity of material can store, and how quickly that energy can be released from a certain quantity of material. If you short out a AA battery, it will get warm for a little while. If you short out a 14500 Li-ion battery (which is the same size and comparable energy density), you might get a small explosion as it dumps its energy very quickly.
- simpsond 1y agoW = Watt. h = hour. One kg supply one watt of power for 178.7 hours (without considering other factors). Power is how much energy can it supply at a moment. Up to 8.3 kW instantaneous.
- detourdog 1y agoDoes it follow that 8.3 kW instance lasts .1787th of an hour?
- Workaccount2 1y agoNo, it would last .0215th of an hour or ~77.5 seconds.
- detourdog 1y agoIs it a base 60 thing, how did you do the math?
- sushibowl 1y agoThere's no base 60 involved, it's the energy available divided by the power delivered: 178.8 Watt hours / 8300 Watts ≈ 0.0215 hours
- detourdog 1y agoThanks, Not sure where my math went wrong.
- NonHyloMorph 1y agoHours to seconds conversion probably, the number 60 plays a role there. (Albeit not base 60 but mod 60, but I'm not firm enough in the math to rule out that there is some correspondence between the concepts)
- deleted 1y ago[deleted]