Monday , January 25 2021

Solid state batteries almost in reality: the new NIO ET7 gets 150 kWh

The development of batteries is taking place at full speed and new types of batteries from laboratory samples are gradually being directed to original tests and perhaps even soon to the market. One of the pioneering technologies must be the company’s new solid state batteries ΝΙΟwhich have been introduced today and are expected to achieve very high densities 360 Wh / kg. Interestingly, today’s common cells, for example at Tesla, are somewhere around 240-260 Wh / kg. This means that the new 150kWh battery should weigh “in cells” about the same as the current 100kWh version. However, the range of cars could increase by 40 to 50% (remember that NIO is an expert and offers up to 110kWh of batteries for sale). The innovation uses a hybrid electrolyte, inorganic Si / C anode and cathode with high nickel content and nano-surface.

NIO solid state battery

China’s NIO resembles a second Tesla and sparks similar stock market excitement. The company is already worth $ 92 billion, which is at the level of a much larger Volkswagen and in 2020 produced only less than 44,000 cars (less than one tenth of what Tesla produces, which produces only one twentieth of what it produces Volkswagen, is about 10 million).


So let’s get to today’s news. This is an electric sedan NIO ET7. It is a large car 5098 mm long, 1987 mm wide and 1505 mm high with a wheelbase of 3060 mm. Following the example of Tesla, take recesses and you will find a giant 1.9 m2 glass roof. We have a 10.2 “digital instrument panel and a 12.8” AMOLED screen in the middle with a resolution of 1728 × 1888 pixels. There is a wide range of connectivity, including 5G, UWB, Wi-Fi 6 and Bluetooth 5.2, the car is capable of V2X connection to the environment. The standard equipment includes 23 speakers with a power of 1000 W.


As for the batteries, the offer will start with the 70kWh version with a range of 500km according to the NEDC standard. However, it is known for its over-optimism, so in real terms, under good conditions, I would expect 350-400 km. The 100kWh variant should theoretically offer a range of up to 700 km according to the NEDC, so you can calculate in a while over 500 km if you want luck, traffic and weather.


However, the ET7 will also have the aforementioned 150kWh solid state battery, which will reach 1000 km. But this will really be just a number on paper and NIO probably chose this old NEDC standard to be the first to be able to launch a car with a range of over 1000 km. We certainly can not expect an average consumption of 15 kWh / 100 km from such a giant car and I would be very surprised if it actually had much higher than 800 km, I would expect 700 km somewhere normally.

Besides, we have 2 electric motors, the first is a 180kW motor with a permanent magnet, the second is a 300kW induction motor. They give a total power of 480 kW and torque of 850 Nm. This is enough to run from 0 to 100 km / h in just 3.9 seconds. The 4-piston Brembo brakes are supposed to help the car stop from a speed of 100 km / h to 33.5 meters.


The skills of autonomous management are also interesting. The car is equipped with 11 8MPx cameras and a LiDAR (1550nm wavelength). In addition, it integrates quite elegantly into the body, where it creates a bulge above the front window, which certainly does not look as strange as the usual “horns” today. Nevertheless, it achieves an excellent drag coefficient of only 0.23Cd. In addition, the cameras on the edges have such an angle of view that they can both see in front of the car and so they can replace the main camera in case of failure. The 8MPx camera must see the car at a distance of 687 meters, the cone at 262 meters and a human at 223 meters. There are also 5 mm wave radars and 33 different sensors.


It is also interesting what all this data is processed, while it is 8 GB / s. System Adam consists of 4 Nvidia Orin units and achieves 1016 TOPS output. In other words, you will find 48 ARM Cortex-A78 cores, 256 3rd generation Tensor cores, 8096 CUDA cores and 68 billion transistors. Normally 2 Master SoCs work, while in case of failure of one of them there is a third, spare part. Then the fourth SoC was designed to teach and adapt the car to the driver.


The basic version with a 70kWh battery costs 448 thousand Chinese yuan (1.48 million CZK), while the battery rental (Battery-as-a-Service – BaaS) costs 378 thousand yuan (1.25 million CZK) with a regular monthly payment of 980 yuan (3,240 CZK). The 100kWh version will cost 506 thousand (1.67 million CZK). The price with BaaS is the same 378 thousand, but the rent is 1480 yuan per month (4900 CZK). The Premier Edition with a 100kWh battery will cost 526 thousand (1.74 million CZK). απ. 398 thousand (1.32 million CZK) with the rental of a lens. The full NAD (automatic control) package costs 680 yuan (2,250 CZK) per month as part of a subscription. The car will be released in early 2022, a 150kWh version with a solid state battery will then appear in Q4 / 2022.

Anyone with the current NIO car can switch to a larger 150kWh battery as part of the NIO Power Swap subscription. Each Battery Swap Station 2.0 can handle 13 batteries and make 312 exchanges a day. It is estimated that by the end of 2021, about 500 of them will be built.

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