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Hybrid Vehicles Electric Vehicles Electric Vehicle Pros & Cons
1586 messages, Last post on Oct 23, 2009 at 4:19 PM
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| Dell just announced it is recalling 4 million laptop batteries. These are Li-ion batteries that have had a few reported cases of overheating with the potential to cause fire. I'm very concerned about the implications for BEVs given that Li-ion technology is what is supposed to allow electric vehicles to approach mainstream acceptance. Maybe there are no real safety issues but if the public starts equating Li-ion batteries to something that might catch fire it will definitely be negative from a PR perspective. It might also result in government agencies being slow to certify new EVs, which will play right into the hands of those that want to maintain the status quo. | |
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Replying to: gypsy_tech (Aug 15, 2006 6:42 pm) * http://www.everspring.net/product-battery.htm * EV hobbyists have been able to experiment with versions of the Thunder Sky batteries for a few years now - but I think the low price is new. If you look at the chart on that page, the batteries now have a price per watt comparable to old-fashioned lead-acid batteries. If the data on the chart is correct, you could build a 200-mile range pack for somewhere around $5000 (not including charging and battery management, which could up the price a bit.) With an 1100 charge lifetime, that's a pack life of 220,000 miles! * I don't have direct experience with these; but I know that charging Li-Ion batteries has to be done correctly, otherwise they can be dangerous. I'm pretty sure the Thunder Sky batteries are in this car, which will be imported here next year.: * http://www.milesautomotive.com/products_xs200.html
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Replying to: apeweek (Aug 16, 2006 8:47 am)
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Replying to: gypsy_tech (Aug 16, 2006 9:19 am) http://thefraserdomain.typepad.com/energy/2006/01/eestor_ultracap.html
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Replying to: apeweek (Aug 17, 2006 4:51 am) In this particular case I am more than a little skeptical. I've recently read about cutting edge research coming out of MIT involving nanotechnology that allows greater surface area in ultracapacitors. In the lab they still haven't come all that close to achieving the energy storage capacity of a battery. The people involved do however think it is possible but probably 10 years off. |
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Replying to: tpe (Aug 17, 2006 7:25 am) http://tyler.blogware.com/blog/_archives/2006/3/29/1849708.html From the press release: "This is a very sophisticated electric car, with 250 to 300 miles of range,” Richard Weir, CEO, president and co-founder of EEStor said. “It’ll take a full electrical charge in about the time it takes to gas up a regular car. Just plug it up for a few minutes and you’re off.” ... “This is just a preview of what’s to come. We have another major announcement for May. But seeing is believing!” he said." Indeed. May has come and gone. Where's the follow-up announcement? |
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Replying to: apeweek (Aug 17, 2006 1:48 pm)
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Replying to: apeweek (Aug 17, 2006 1:48 pm) WHAT???? I'm not an electrical engineer but just out of curiousity, how many kW would be expended driving 250 miles? Now, what would the voltage and amperage need to be for the recharging station to dump THAT MUCH electrical energy back into the batteries in just a few minutes? I mean, the electrical energy needed to move a 2000 lb. vehicle at highway speeds for 250 miles is NOT a piddling amount of energy. And we're talking about dumping that amount of energy into a battery in just a few minutes?
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Replying to: apeweek (Aug 17, 2006 1:48 pm) Yeah, 300 miles, 55 MPH, lots of coasting.... no AC, no nothing.  I too shall join the waiting. |
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Replying to: rorr (Aug 17, 2006 2:42 pm) Granted, you would not be doing this at home! Charging at home would still take a few hours. 50KWH is about the size battery pack you would use to get a driving range of about 200 miles at 75mph.
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