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Tesla Model 3 battery energy density increased by 30%

Author: Source: Datetime: 2016-11-21 11:23:51

Although Tesla has not officially announced the new Model 3 battery pack assembly models, the investor relations department vice president Jeff Evanson said earlier that the basic version of Model 3 will be equipped with less than 600 million of the battery pack, a single charge mileage will be more than 215 miles (about 346 km), but there will be other higher configuration options, some manufactures take LiFePO4 battery pack as their car battery.


Last month, Tesla chief technology officer JB Straubel in Mexico held a forum of entrepreneurs (National Entrepreneur Week) published a speech, improvement of the Tesla battery technology is introduced in detail. Straubel said, Tesla Model 3 battery energy density (density energy) than the S Model to enhance the 30%.

In the past about the Tesla super battery production factory of Gigafactory, the company's executives always refer to the 30% number, but they refer to the most and cost related, rather than to the energy density of the battery.


In this Straubel's speech, he will be directly linked to the cost of the battery energy density:


"In fact, when you increase the battery energy density, while also reducing the cost of the battery. Generally speaking, the cost defined by us is the raw material of the battery. Therefore, if you want to reduce costs, the best way is to reduce raw materials, increase energy density. This is a key to our research and development work is very favorable, and this is the reality of the situation in life." Tesla also produce battery in their solar power generator as storage battery.


In this regard, Straubel uses the following slide to make an explanation:

Battery Cost

Tesla currently does not need to make a major breakthrough on the battery, as long as some of its improvement is enough to bring about an important impact. The various properties of our battery is steadily increasing every year - for a given storage energy of the battery can enhance the energy density of nearly 5% per year, which is an important data for Tesla concerned. From the first Roadster sports car to S Model, our battery energy density has increased by nearly 40%, while the Model 3 will enhance 30%, these results are derived from our continuous improvement."


In fact, in the recent release of other products in Tesla, Lei Feng network also can be seen to enhance the impact of the battery energy density. Tesla Powerwall 2 and Powerpack 2 have higher energy density in the battery pack level.


Tesla Powerpack 2 is a good example. The first generation AC Powerpack weighs 1720 kg, the energy capacity of 95kWh, the battery pack energy density is 55 Wh/kg. A new generation of Powerpack 1622 weight 2 kg, energy capacity of 210 kWh, its battery level energy density of 130 Wh/kg. For just one year, the battery pack's energy density increased by 136%. Of course, for such as Powerpack fixed type solar backup generator system, the cost is a more important factor than the weight, however, as Straubel said, in the development of Tesla battery technology, energy density and cost of the inseparable relationship.

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