Mercedes-Benz EQXX: 30% lighter flashlight and 400Wh / l at battery level

Although we do not usually deal with cars here, autonomous driving using artificial intelligence or battery technology and electricity generation are the topics we deal with. Today we will look at the significant progress of the carmaker Mercedes-Benz and the HPP (High Performance Powertrains) team in the field of batteries. In concept Vision EQXXwhich was outlined about half a year ago, is a lithium battery that has undergone significant modifications. So it’s not a revolutionary technology that uses completely different materials, but a lithium battery whose anodes have higher amounts of silicon, and some might consider them silicon batteries.-

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There has been a lot of talk about them lately (1, 2, 3, 4, 5) and now we have a car that already contains them. Of course, this does not automatically mean that he will be in stores tomorrow. However, some of the technologies presented in the concept can be expected in the following years in regular production. And what does it all bring?-

Mercedes-Benz battery compares with that in model EQS. There it receives 108 kWh, while the EQXX is slightly below 100 kWh, but that’s not much of a difference. However, the battery has half the volume and density 400 Wh / l at battery level. Be careful not at the level of the cell (there are today’s cells around 700 Wh / l), but the entire battery, including packaging, cooling and the like. The entire battery takes up about 250 liters of volume under the car floor. Interestingly, the Tesla Model 3 has a battery with a volume of about 340-370 liters, which for an LFP battery means a density of about 150-160 Wh / l and for NCA versions about 210-240 Wh / l. It should also have an EQS around 220 Wh / l. That’s a really big difference.-

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Mercedes has achieved this not only by increasing the density of the cells themselves, but also by a different layout and fully passive cooling (but it is probably appropriate to worry about durability here, as other passively cooled electric cars show).

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However, not only the bulk density increased, but also the mass density. The entire battery, including accessories, weighs 495 kg, which is 30% less than the one in the EQS (so it costs just over 700 kg). While the EQS has about 155 Wh / kg at the battery level (Tesla also has between 155 and 165 Wh / kg), the EQXX already has a zhruba 200 Wh/kg. Again, we’re talking about the level of batteries, not cells. The battery uses a voltage of 900 V.

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Despite the half-ton battery, the car weighs 1,750 kg, has a 150 kW electric motor and consumes less than 10 kWh / 100 km. This is also helped by the excellent aerodynamics Cd 0.17 and high 95% efficiency of the electric motor. Interestingly, the penguin has a Cd of 0.05, an EQS of 0.20 and an American football ball of 0.18-0.2. According to Mercedes, the car should travel 1000 km on a single charge. Another help is to be 117 solar cells on the roof, which are ideal for charging the car for another 25 km. The 47.5 “screen with an 8K resolution of 7680 × 660 pixels can also be of interest.

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Prices of related / similar products:

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