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New Electrode Lets Batteries Charge In 10 Seconds
Al writes "A new lithium-ion electrode allows batteries to be charged and discharged in 10 seconds flat. Developed by Gerbrand Ceder, a professor of materials science at MIT, it could be particularly useful where rapid power bursts are needed, such as for hybrid cars, but also for portable electronic devices. In testing, batteries incorporating the electrodes discharged in just 10 seconds. In comparison, the best high-power lithium-ion batteries today discharge in a minute and a half, and conventional lithium-ion batteries, such as those found in laptops, can take hours to discharge. The new high rate electrode, the researchers calculate, would allow a one-liter battery based on the material to deliver 25,000 watts, or enough power for about 20 vacuum cleaners."
but for a man-portable railgun, the batteries are used to charge the capacitors, all in the back pack.
What are you going to plug your charger into?
How about the slow charge, high drain battery bank in the basement. You know, the one that's being charged by the solar panels on the roof and the wind generator in the back yard. Oh, and occasionally off the grid, during off peak hours.
I'm kidding. When I go off the grid, I'll be finding a nice piece of land with good sized waterfall, and setting up a micro-hydro system.
When our name is on the back of your car, we're behind you all the way!
A 100hp generator weighs 1500 pounds.
Really? I assume you're including the substantial weight of a diesel engine to drive said generator, as a quick google search turns up the Winco EC75PSB4G-17 - a 75 kilowatt emergency backup generator head (just the part that turns shaft movement into AC power) that weighs in at 605 lbs. That's a unit intended for stationary use, not to be mounted to a vehicle. I'm sure a similar device intended for mobile use could be constructed from less massive materials.
In fact, may I direct you to look over the specifications page for the Honda FCX Clarity: link. There you will find that power from the vehicle's fuel cell stack and lithium ion battery is converted to motive force by a 100kW (134 hp) AC electric motor with integrated transaxle. While the page lacks a weight listing for said motive unit, I doubt it exceeds 400 lbs.