Electric Vehicles – Batteries and Fuel Cells
Honda’s Steve Ellis is one of the world’s foremost authorities on the subject of alternative fuel vehicles and their commercial trajectory. He happened to be a fellow speaker at last month’s AltCarExpo in Santa Monica, and I’m proud to count him among my friends. We’ve have had several meetings over the past year or so, from which I’ve learned how much more there is to the subject of fuel cells than most people realize. In an interview last night, Steve reviewed the subject with me from top to bottom, forming the basis of an important chapter in my book on renewables.
While they were fresh in my mind, I thought I’d note a few of the most interesting highlights from Steve’s presentation:
- Of those who know anything at all about fuel cells, most have opinions that are based on sources that have made essentially no effort to treat the subject fairly.
- It is true that the process by which hydrogen (the “fuel”) is electrolyzed from water and then, in the car, recombined with oxygen to form water is less efficient that the process of storing electrical energy in a battery and converting it to kinetic energy in an electric motor. However, this is largely missing the point; there are far more important factors that affect fuel cells’ utility in transportation that are normally overlooked.
- Both types of electric vehicles (fuel cell and battery) offer the potential for completely clean transportation; the issue is how the energy is generated in the first place.
- Over the past few years, the efficiency of fuel cells has improved faster than the relevant statistics (energy density and cost) of batteries.
- Technologies by which drivers can refuel their cars for longer trips will bedevil the battery electric vehicle market for the foreseeable future. Better Place is not a good fit for the US, and ubiquitous quick-charging is many decades away, if it ever comes at all. So if you want clean vehicles that can be refueled in a matter of a few minutes (versus many hours), hydrogen is your only answer.
I guess the most memorable moment of the interview was the concept of personal emotion and politics. Steve is at a loss to understand why people with a sincere devotion to environmental stewardship would manipulate the facts to denegrate a technology that is strategic to moving us in the right direction. “This is truly strange behavior. Fuel cell advocates don’t try to derail the battery industry. It’s obvious that both have strengths and weaknesses, and form complementary paths in our journey to clean transportation.”
I guess we’d all like to think that meeting the challenges of reducing our carbon footprint are purely technological, rather than political. Or — if the challenges in fact do have political components that it’s “the good guys against the bad guys” — and that there is a kind of “brotherly love” among the fans of renewable energy and electric transportation. But my recent interviews have suggested that this is not the case. All I can say is what I remind my kids of constantly: This is not going to be easy. Let’s not fight among ourselves and make it impossible.


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