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Posts tagged “batteries”

By Russ Finley on Feb 26, 2012 with 13 responses

How to Turn a Tesla Battery Pack Into a $40,000 Brick

Li-ion, Not Your Father’s Battery

This Tesla-to-brick story first appeared in the Understatement blog, authored by Michael Degusta. Some rich guy, too busy to read his owner’s manual, parked his six-figure sports car in a garage for six weeks while his home was being remodeled.

From the Tesla owner’s manual:

“Keep in mind that when the vehicle is left unplugged with a full Battery, the initial rate of decline can be significant. When fully charged, the Battery’s charge level can drop as much as 7% a day and 50% within the first week. When the Battery’s charge level falls below 50%, the rate of decline slows down to approximately 5% per week. Over-discharge can permanently damage the Battery.”

That equates to a ruined battery in roughly 11 weeks. In other words, for this Tesla to be damaged in six weeks, it was likely parked with a mostly discharged battery. Ouch.


By Robert Rapier on Jun 22, 2009 with no responses

ExxonMobil in the Electric Car Business?

An interesting link from a reader this morning:The Maya 300: An Exxon-Assisted Electric Car If you’ve picked up a magazine in the last year, you’ve likely seen ads touting ExxonMobil’s (XOM) research into lithium-ion batteries. This week, you will get a further look into how that technology will come to the marketplace. Electrovaya on Wednesday will discuss its plans for the Maya 300, an all-electric vehicle coming in 2011. The car will run on lithium-ion batteries, charge in about eight to 10 hours, run for 60 miles and plug into regular 110-volt outlets. It will cost around $20,000 to $25,000. An extended-range battery option will run for 120 miles on a charge and cost $30,000 to $35,000. Turns out that… Continue»

By Robert Rapier on May 4, 2009 with no responses

Vinod Khosla at Milken Institute: Part III

This will be the conclusion of Vinod Khosla’s (VK) recent lengthy interview at the Milken Institute 2009 Global Conference. The interview was conducted by Elizabeth Corcoran (EC) of Forbes and can be viewed here. In Part I, VK discussed the role of government money, capital intensity of renewable projects, and some of his solar investments. In Part II, VK discussed butanol, cellulosic ethanol, nuclear power, and cap and trade. Here in Part III, VK discusses his beef with electric cars, has lots to say about Black Swans, discusses his problems with nuclear in more detail, talks about green jobs, sugarcane ethanol, and weighs in on indirect land use issues for biofuels. EC (39:00): Let’s get to those electric cars. You… Continue»