Etanol.nu

That said, I've left my LEAF with 7/12 "bars" of electricity at LAX for over 2 weeks while I was on vacation and returned to find exactly 7/12 "bars" remaining.

If the Roadster lost 25% SOC over the course of 6 weeks then something isn't right. Keep in mind that 25% of a Tesla Roadster's battery pack is equal to 13.25kWh and my 7/12 bars of the Leaf would be equal to about 14kWh. Leaf owners have routinely left their cars stored for weeks or months with 50-70% SOC and seen little to no loss of power.

The pack is designed to prevent catastrophic cell failures from propagating to adjacent cells, even when the cooling system is off. Coolant is pumped continuously through the ESS both when the car is running and when the car is turned off if the pack retains more than a 90% charge. The coolant pump draws 146 watts

Pinsamt och märkligt att detta ska dra så mkt ström, moderna cirkulationspumpar för centralvärme i en villa drar knappt en tredje del.
/Aryan

The Leaf uses its 12 volt battery for ancillaries and the main battery shuts down entirely.
People have come back after weeks of non-use and they have pretty much the same charge as they had when left.

En del nämner att Model S, X osv liksom Leaf har batteriet i golvet och därmed till skillnad från Roadstern får en väldigt stor yta för avkylning. Har faktiskt också svårt att tänka mig att man ska behöva köra cirkulationspumpen även då bilen står still med tanke på den konstruktionen. Kanske en kort tid just efter körning men mer än så ?

Tror också det beror på typen av batterierna som Tesla roadster använder de behöver uppenbarligen kylas ordentligt för att vara på den säkra sidan och undvika att batteriet kan börja brinna. Bättre då att ta välja lite mindre energitäta batterier som är säkra i sig själva http://en.wikipedia.org/wiki/Lithium-ion_battery#Safety men då blir batteriet tyngre och större.

for the Roadster we uses almost unmodified laptop cells, but for the Model S we use a highly modified cell..
the great thing about the Roadster is that is has helped us figure out what needs to be improve to make it ideal for automotive applications

That is one of the problems with Lithium Cobalt batteries. They do not like to be over discharged, or overcharged for that matter. The Tesla has its battery thermal control system running at full power all of the time. In cool weather it is heating the batteries to keep them at the ideal temperature and in warm weather cooling them. This thermal control uses a significant amount of energy over time.

Also Tesla recommends that when you park the car it should stored at %50 SOC to extend the life of the batteries. But with the cooling system running you have to leave it plugged in. This will by default charge the pack to full shortening the battery life

The earliest Roadsters will take over two months to discharge if parked at a 50 percent charge without being plugged in. From that starting point, Tesla has consistently innovated and improved our battery technology. For example, a Model S battery parked with 50 percent charge would approach full discharge only after about 12 months. Model S batteries also have the ability to protect themselves as they approach very low charge levels by going into a "deep sleep" mode that lowers the loss even further. A Model S will not allow its battery to fall below about 5 percent charge. At that point the car can still sit for many months. Of course you can drive a Model S to 0 percent charge, but even in that circumstance, if you plug it in within 30 days, the battery will recover normally.

Tesla and the company's lawyers are nothing if not determined. After a judge smacked down the electric vehicle manufacturer's libel suit against the BBC and Top Gear for comments made about the range of the Tesla Roadster, the automaker rallied with a second, amended lawsuit. It didn't take long for the the same judge to nix the new case, too, saying the amendment was "not capable of being defamatory at all, or, if it is, it is not capable of being a sufficiently serious defamatory meaning to constitute a real and substantial tort."

That sound? It's the smack of the judicial backhand.

The judge went on to say drivers know a manufacturer's claim about range is dependent on driving conditions and habits.