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Beijing time on July 9 news, Tesla and Supercharger (super charging station) charging network has proved to us, as long as there is a strong fast charging infrastructure, persuading consumers to turn to electric cars will be easier. If we really want to reduce emissions, it is not enough to electrify passenger cars. Proterra, an electric vehicle manufacturer, thinks so too, and because of this, it will apply for a patent on fast charging, which was developed for electric buses.
In fact, not all heavy vehicles are suitable for installing electric drive systems, such as long-distance trucks. Having said that, buses, garbage trucks, and other trucks traveling in cities can be powered by electricity. It takes only a short time for trucks to be fully charged and put back into work.
Proterra's high-voltage aerial charging system uses machine control technology. The bus is equipped with automatic driving software. It takes at least 10 minutes to fully charge the battery. Of course, the specific charging time depends on the battery size. If charged with 250-1000 VDC, the current is up to 1400 amps. The charging rate of the system is 9 times that of the CHAdeMO fast charging standard. The BT Supercharger is 3-4 times faster. The buses are generally powered by old-fashioned transmission racks, but the transmission racks need to be installed on the entire route of the car, and the Proterra system is stationary. That is, the bus operator can install the system near the terminal or the gas station.
“The most interesting thing is that the diesel buses have huge fuel tanks installed and they are very inefficient. They need to fill up an 80 or 120-gallon diesel bus and it takes longer than our recharged cars.†Proterra CEO Ryan Popple explained, “We have now reached a tipping point: if the vehicle is equipped with our fast charging technology, it needs to be fully charged for the car, and it takes longer than connecting the hoses and filling up the diesel buses. The time spent on oil is even shorter."
According to Popper's introduction, the Proterra quick-charge station can fully charge 100 kWh electric buses in just 10 minutes, enough to make the cycle bus run more than 30 miles (about 48 kilometers). Compared with diesel or gasoline, electric technology is better, Popper said: “People have always thought that electric cars have some bad places. For example, charging is too slow and it takes a whole night to fully charge. We have begun to get rid of these shortcomings. Now that we have reached a critical point, electric vehicles will have the upper hand in the rate of fuel burning and the speed of addition." If it is a long-distance electric bus, a 400 kWh battery will be installed and it will take longer to fully charge.
Popper said: "We are growing rapidly. There are still many backlogs that are not completed and will continue through the end of next year. In 2017, our shipments will grow by a factor of 2. However, we must allow the industry to grow at a faster rate. We still have a lot of work to do and we also found that competitive electric buses in the market lack rapid charging equipment, and for large fleets, large-scale deployment of electric vehicles is a key tool for rapid charging equipment. For other companies, it can help the market grow faster."
Although Proterra has decided to open its core patents to early customers, customers still have concerns that they want to buy electric cars from other companies and then use Proterra's infrastructure. Obviously, companies do not want to bundle themselves with a single supplier. Popper responded by saying: "If we bind the customer's products, just as iPhone users must use Apple's charging cable, then the customer's board will be worried. In the smart phone industry you can do this, the car is an industrial market, accept new technology The speed is relatively slow and we do not need to do this."
The first batch of customers will receive a license for the transfer of a patent for charging, and Proterra will also decide to bundle important patents and provide it to everyone under an open license agreement. Popper said: "This can speed up the process of electrification of heavy-duty vehicles in cities, and at the same time, we can also protect our core business. For a young technology company, it's really important to do one thing well."
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