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Gigafactory batteries might have a Prius application
Source: Next Big Future: Gigafactory batteries and factory productivity
The basis of the energy storage system of Tesla products are lithium-ion cells in the 18650 form factor. These cylindrical cells have a diameter of 18 mm and are 65 mm in length, a size used for the batteries of laptops. Cylindrical cells are generally less expensive (costing 190–200 dollars per kWh as of 2014) than large format cells whose active layers are stacked or folded (approximately 240–250 dollars per kWh).
The battery cells that will be produced at the Gigafactory are of a new form factor, larger than the 18650 cells used in the Model S and Model X automobiles. While the cells were originally expected to be at least 20 mm in diameter and 70 mm in length,revised specifications for the optimized form factor are 21 mm (0.83 in) by 70 mm (2.8 in).... -
MIT Study on EVs
Source: Can today’s EVs make a dent in climate change? | MIT News
The study, which found that a wholesale replacement of conventional vehicles with electric ones is possible today and could play a significant role in meeting climate change mitigation goals, was published today in the journal Nature Energy by Jessika Trancik, the Atlantic Richfield Career Development Associate Professor in Energy Studies at MIT’s Institute for Data, Systems, and Society (IDSS), along with graduate student Zachary Needell, postdoc James McNerney, and recent graduate Michael Chang SM ’15.
“Roughly 90 percent of the personal vehicles on the road daily could be replaced by a low-cost electric vehicle available on the market today, even if the cars can only charge overnight,” Trancik says, “which would more than meet near-term U.S. climate targets for personal vehicle travel.” Overall, when accounting for...
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