3 ms·
Did not realize how heavy modern batteries still were. Tesla Model 3 batteries weight 480kg for 80.5kWh, density of 167Wh/kg. The DARPA vehicle running for 1h
by karambahh 8y ago
Did not realize how heavy modern batteries still were.
Tesla Model 3 batteries weight 480kg for 80.5kWh, density of 167Wh/kg.
The DARPA vehicle running for 1h at full power would require a whopping 2400kg of batteries! To give a comparison point, according to Wikipedia, 2400kg is the weight of an Humvee.
I guess it'll still take a little while until the DARPA concept becomes an actual vehicle...
- vegardx 8y agoNothing that stops them from putting in a small turbine to generate electricity. If memory serves me right, this is what some modern tanks do, like the Abraham. Add in a somewhat small (compared to battery powered only) battery pack and you can use that to power the vehicle when idling.
- SigmundA 8y agoAbrahams use mechanical transmission from the turbines. Some ships and trains use diesel electric drivetrains or even turbine electric but its not for weight or efficiency but controllability. My understanding hybrid electric drivetrains are around 80% efficiency, while normal mechanical drivetrains are in the mid 90's. This is why nearly all hybrid cars switch over to normal mechnical drive typically at highway speeds as it more much efficient, while in the city in stop and go the electric drive train beats it due to regeneration and stop light idling.