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A fuel cell is basically a battery. Fuel cells and batteries hey use a chemical reaction to make electricity. A when the chemicals in a battery are used depleted, you throw the battery away or up, you must recharge or throw away the battery. The chemicals of a fuel cell are hydrogen and oxygen. You provide the hydrogen. The fuel cell stack uses free-of-charge oxygen from the air and produces electricity plus H2O – water. Refilling the hydrogen tank should not take longer than filling up with unleaded. Next stop after 400+ miles. The only way to extend the range of a BEV (if you don't want to add an ICE) is by adding more batteries. This quickly becomes an exercise in futility. Each added battery cell means more weight, heavier brakes, a larger traction motor, a stronger body to carry the mass, and in turn even more batteries. And most of all, it becomes insanely expensive. Not so with fuel cells. Fuel cells can make electricity at weights that are between eight to 14 times less than current batteries. Extending the range of a fuel cell vehicle has negligible impact on its weight. Like electricity, hydrogen is not a way to make energy, it is a way to transport energy. Hydrogen can be made in the same number of ways as electricity. And why aren't we all driving around in fuel cell vehicles by now? There were a number of technical challenges, but as Toyota Chief Engineer Satoshi Ogiso had told us last year, the challenges have all been mastered. The only real problem Ogiso is facing with hydrogen fuel cell vehicles is money:
Current fuel cell technology is big, bulky, heavy and expensive. With enough scale, package size and price can come down considerably. Toyota plans to launch a commercial FCV in 2015. It still will be expensive, the Nikkei figures 5 million yen, or $62,000. By 2020, Ogiso plans to have an affordable FCV.
from The Truth About Cars http://www.thetruthaboutcars.com | |||
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