【Understand the way of the car Technical interpretation】 Netizens on the Internet are singing about mercedes-benz, complaining that Mercedes-Benz is the same "oil to electricity" in the era of pure electricity, and the originator of the car has failed. In 2022, Mercedes-Benz in China EQA, EQB, EQC, EQE, EQS five pure electric models on sale, Mercedes-Benz is unwilling to admit that these are oil to electricity, but it looks like oil to electricity? What do you think?
Although in the pure electric market Mercedes-Benz has lost in the brand and start, but the research and development still has to continue, the last dignity must be picked up, recently, Mercedes-Benz's new pure electric concept car VISION EQXX at CES 2022 global debut, Mercedes-Benz in the history of the best energy efficiency model, 100 km energy consumption is less than 10kWh, single charge mileage of more than 1000 kilometers, in the end what strength, can save mercedes-Benz lost dignity.
We give a few pictures of Mercedes-Benz EQS for your reference, Mercedes-Benz is selling the latest electric car.
(Mercedes EQS)
In terms of appearance, the appearance of Mercedes-Benz's new pure electric concept car VISION EQXX is a very smooth design, achieving the ultra-low drag coefficient of Cd0.17. In fact, Mercedes-Benz has been studying aerodynamics, 540KStreamliner in 1937 in the first thought of aerodynamics, 1978 C111-III is to create in addition to Cd 0.183 ultra-low drag coefficient. In 2015, Mercedes-Benz released the IAA aerodynamic concept car, the first Mercedes-Benz model to use active aerodynamic performance.
The EQXX front face is wide and covered with a three-pronged starlight logo, which echoes the design of the headlights, and has the role of an active intake grille inside, increasing the wind resistance coefficient by only 0.007 when opened. "The Way to Understand the Car" speculates that this set of active air intake grilles on EQXX is to dissipate heat to the electric drive system, and only when the temperature is very high, the active intake grille will be opened, so as to ensure the ultra-low wind resistance coefficient. In fact, in the process of vehicle driving, the electric drive system mainly dissipates heat through the heat dissipation plate at the bottom of the vehicle. The actual windward area of the front of the car is smaller than the Mercedes-Benz CLA and smart, and the rear wheelbase is 50 mm less than the front wheelbase, which can achieve the role of rear inward recovery.
The body is made of MS1500 ultra-high strength martensitic steel, which is 100% steel scrap produced by electric arc furnace technology. The doors are made of a mixture of CFRP carbon fiber reinforced plastic, GFRP glass fiber reinforced plastic and reinforced aluminum alloy, which can achieve strong quantification and enhance stiffness and ductility to absorb energy. The EQXX roof uses 117 solar panels.
The obtained energy will be stored in a lithium iron phosphate battery, the main role, is the power supply of auxiliary equipment in the car, such as lights, car machines, car entertainment, 12V power supply and so on. The panels were developed in collaboration with mercedes-Benz and the Fraunhofer Institute for Solar Systems in Germany, and every day, if ideal, can add 25 kilometers of life to the vehicle, thus further pursuing a balance between energy consumption and range.
The tail streamline design makes the wind resistance coefficient lower, and adopts a long and adduct design idea, which can reduce turbulence and further reduce air resistance. The EQXX concept car is equipped with a spoiler at the rear, which can automatically pop out when driving at high speeds.
In order to make the air flow more smoothly through the chassis, the tail also added an active diffuser, the simple understanding is the upward tilt of the deflector, the role is to quickly pump the air flow of the bottom of the car, the air flow speed is greatly reduced, the bottom of the car has formed a low pressure area, the roof is in a high pressure area at this time, forming a downward pressure force, so that EQXX is close to the ground. To achieve aerodynamics, in a car, the diffuser, spoiler, streamline shape and aerodynamic kit must be combined to work together.
EQXX concept car using fully enclosed low roll resistance wheels, we all know that the tire is the only contact surface between the car and the road surface, in order to reduce the turbulence generated by wheel rotation, in terms of tires, the EQXX concept car uses The Toronto Eco tires of Bridgestone cooperated by Mercedes-Benz and Bridgestone, using lightweight and environmentally friendly ENLITEN and Ologic technology, to achieve ultra-low rolling resistance, in order to improve efficiency, the width of the tire is 185mm.
In addition to these, it also has a design that reduces energy consumption and wind resistance, and the tail structure of BONEQXX is made of biomimetic process materials, and its design is inspired by the monarch butterfly, and the BIONQXX structural part refers to the wings of the monarch butterfly. Careful research found that its process manufacturing is very precise, this is a layer of mechanism design, or a complete component. Through the optimization of the geometry, a total of 42 UBQ SMRs were inserted, and after inserting the BIOQXX parts, the UBQ SMDs used a special bonding process to completely seal the holes, completely isolate water and dirt, and have a sound insulation effect.
This innovative engineering method of BIONEQXX parts can reduce the weight of parts by 15%-20% compared to parts produced in the traditional way. It is worth mentioning that in order to get such a surface in the actual casting, Mercedes-Benz also uses 3D printing sand mold technology. In the rear position, in order to enhance reliability and durability, Mercedes-Benz has partnered with UBQ Materials, an Israeli company that mainly deals in environmentally friendly materials, to replace traditional plastics, wood and concrete in a certain degree of production.
In addition to the tail structure, the front and rear tower tops of the wheel-mounted suspension are also biomimetic, BIONICAST, which can reduce the weight by about 4 kg compared to the original traditional stamped dome. In fact, the EQXX concept car's bracket carrying the windshield wiper and motor is also designed with a biomimetic process, a pioneering technology that can greatly reduce the weight of the body while maintaining body stiffness and maximizing its function in a very small space. At present, the bionic process has been applied to Mercedes-Benz's mass production models, such as the new EQS chassis, which has been improved using this technology.
Interior, diagonal 47.5 inches of a large screen, the resolution reached 8K, at present we commonly use 4K and 5K, the screen by 3000 LED dimming areas, can do a certain area of the screen display, are energy-saving angle.
The car part is the most discussed part, Mercedes-Benz and California artificial intelligence company BrainChip technology, the development of Akida neuromorphic system-on-chip hardware and software. The wake-up process is no different from the Mercedes-Benz currently on sale, a sentence of "Hello Mercedes-Benz" can wake up, and the wake-up speed of the car and the accuracy of speech recognition will be increased by 5-10 times.
In terms of power, Mercedes-AMG High Performance Powertrain has redesigned the drivetrain, including system design, material selection, lubrication and thermal management, so that 95% of the battery energy can be transferred to the wheels, compared with only about 75% of the current pure electric models. Using CTP (Cell to Pack) technology, by omitting the module, the battery string and parallel are directly connected together to reduce the weight of the battery pack and achieve weight reduction.
The use of CTP-like battery pack "sticks" on the bottom plate also cancels the complicated liquid cold heat dissipation structure, the battery pack will directly use the heat exhaust plate to conduct heat at the bottom of the car, and the heat conduction speed is fast, the effect is more uniform, and the cancellation of a series of structures can also greatly improve the energy density of the battery pack. This is equivalent to putting the EQS battery into a more compact model, and the energy of the two batteries is almost the same, but the battery volume of the EQXX concept car is only half the size of the EQS, and the weight is reduced by 30%. Achieve an energy density close to 400Wh/L.
As the energy density of the battery increases, Mercedes-Benz also adds the silicon anode process, that is, the use of the process of adding ionic polymers, so that the battery has more than 10 times the energy density. The safety and reliability of such a technology, "The Way to Understand the Car" to further observe, in the EQXX concept car battery pack equipped with a OneBox box, integrated with various components other than the battery, so that the battery can make more space, but also to achieve the convenience of disassembly and installation during maintenance, the total weight of the entire battery pack is about 495 kg.
The battery cover is also made of sustainable composite materials, which are made from sugarcane waste and reinforced with carbon fiber after processing, which is also used in F1 racing cars. In addition, the battery pack of the EQXX concept car also has an active equalization function, which not only ensures that the vehicle draws energy evenly from the battery while driving, but also maintains the consistency of the internal monomer cells at all times, resulting in higher mileage.
As a pure electric model, the EQXX concept car adopts heat pump air conditioning, and is equipped with a multi-source heat pump to draw heat from the surrounding environment and also collect heat from the drive system. Multi-source heat pumps also incorporate "enthalpy evaporation" technology when dehumidifying the cabin environment.
The editor has something to say:
The "Mercedes-Benz brand effect" has failed in the era of electric vehicles, and it is necessary to deny the status and contribution of Mercedes-Benz in the history of the automobile industry and the history of the internal combustion engine, and in the past hundred years, whenever Mercedes-Benz released its traditional technology, everyone was watching. However, this time the release of the EQXX concept car, the attention is not high.
"The Way to Understand the Car" still wants to take a moment to summarize a few advantages, the mileage is the advantage of this car, this set of power systems and not enough Mercedes-Benz's ultra-low design concept, pragmatic and moderate Mercedes-Benz, with the emergence of the EQXX concept car, we are thinking about this is what Mercedes-Benz's future looks like in the electric era? To be honest, there are not too many surprises, many new forces have been mass-produced, and Mercedes-Benz is still talking about concepts. We are thinking, is Mercedes-Benz old, or the new forces are too strong ~ this problem is left to you, your ideas must not be stingy, the article below the comments comments. (Pictured: Source Motor 1; Text: The Way of Knowing the Car, Wang Zhiwu, Editor)