3 ms·
Battery energy density has come a long way but I have a hard time believing a 400g battery can do much at 800w (even just peak) for long. Moving large masses li
by superkuh 2y ago
Battery energy density has come a long way but I have a hard time believing a 400g battery can do much at 800w (even just peak) for long. Moving large masses like human bodies requires a lot of energy.
The ergonomics of this design look much less likely to snag and get in the way than other powered exoskeletons I've seen though. Replace the electrical motor and battery with a chemical energy system (internal combustion, or even just hydrogen peroxide decomposition on silver catalyst) and this could go a long way (but with higher response latency, much higher noise, and increased control complexity).
- dogma1138 2y agoMuch smaller batteries can do more a 3S lipo battery with 50C discharge rate that weighs probably around 100g can output about a kilowatt discharge without break a sweat. This is what allows drones to be a thing. The large DJI drones like the T40 are 4KW per rotor… https://www.dji.com/uk/mobile/t40/specs https://www.dji.com/uk/mobile/t40/specs
- superkuh 2y agoI am not doubting the instantaneous output in power. Batteries have always been great at that. I am doubting the energy storage capacity and ability to output that power over time (energy). Humans are a lot heavier than flying quadcopters and quad and multi-copters almost universally don't last for more than ~30 minutes. High power but not much actual energy storage compared to chemical.
- tecleandor 2y agoWeight seems more or less in line with a 4S 5000mAh 100C battery https://hobbyking.com/en_us/turnigy-rapid-5000mah-4s-14-8v-100c-lipo-battery-pack-w-ec5-connector.html https://hobbyking.com/en_us/turnigy-rapid-5000mah-4s-14-8v-1...