From 400 km to 640 km, what Tesla did to roadster

Absrtact: Yesterday, Tesla announced that it would upgrade the company's convertible Model Roadster 3.0, dramatically boosting the mileage of the electric car. The upgrade will be scheduled for early 2015, and Tesla has not disclosed how much the upgrade would require the owner to pay, but the

Yesterday, Tesla announced that it would upgrade the company's Convertible Roadster 3.0, dramatically boosting the mileage of the electric car. The upgrade will be scheduled for early 2015, and Tesla has not disclosed how much the upgrade would require the owner to pay, although the company said it was not the last Roadster upgrade.

At the beginning of the release, roadster 244 miles and nearly 400 miles. The upgrade of the battery capacity increased by 30%, the endurance is achieved 40%-50% of the upgrade. Can be compared to the Model S 60KWh version of the 85KWh version. The latter's battery capacity was 42% higher than the former, but the mileage increased by only 33%. It can be seen that the improvement of this roadster is all-round.

Tesla's official blog revealed the details of the upgrade:

Roadster 3.0 battery performance increased by 31%, from 53kWh to 70kWh. A modified aerodynamic kit has been added to make the profile of the vehicle slightly altered to allow the drag factor (Cd) to drop from 0.36 to 0.31, about 15%. * Upgraded tires will roll drag coefficient (CRR) from 11.0kg/ton to 8.9kg/ton, about 20%, in addition, roadster also improved axle bearing and residual braking performance. The above upgrade significantly reduced the weight of the roadster, the upgrade weight of 1.2 tons, compared to the previous 1 tons of light

Roadster 40%-50%, the upgraded Roadster will be the world's longest production of pure electric vehicles. Tesla said: "In the specific speed and driving environment, the roadster mileage can be more than 400 miles (about 644 km)." We will show the model in the real world in early 2015, and we will have a non-stop test drive between San Francisco and Los Angeles. "This is even more than a box of petrol in many traditional cars."

In addition, Musk stressed that the upgrade is only for Roadster. "But in the long run, Model S will also usher in the upgrade." Musk added.

Roadster is the first car to be introduced by Tesla, which is also the number one vehicle to be produced using lithium-ion batteries, sold in 2008, North America in 2011 and other markets in 2012. A total of 2,418 vehicles have been sold worldwide.

Seven years, roadster from 400 km to 640 km. In two years, Model s hundred kilometers accelerated from 5.6 seconds down to 3.2 seconds. It's not hard to see how fast all-electric cars continue to write Moore's Law on Wheels. This iterative speed and imagination is also the reason Tesla's share price and sales are protected from the recent fall in oil prices.

Tesla's shares rose 2.5% per cent on 26th, at 227.82 dollars. Tesla's shares have risen 51% per cent so far this year, outperforming the S & P 500, which rose 13% per cent in the same period.