China is at the forefront of the development of electric vehicles. Not only does it rank first in market size, but it also ranks first in technology. The newly released Quark electric drive by Aian has a motor power density of 12kW/kg, ranking first in the world in mass power density, which is directly double the industry mainstream 6kW/kg.
In the past, I have heard the concept of energy density mentioned in the context of batteries. What does the power density of a motor mean? The ratio of the maximum power of the motor to the mass or volume of the motor. Under the same power conditions, if the mass power density is high, the motor will be lighter, which is beneficial to vehicle weight reduction. The increase in volumetric power density is beneficial to the spatial layout of the vehicle, which can provide a larger seating space in the vehicle, or more motors can be arranged to achieve ultimate performance. Of course, there is more room for imagination with smaller and stronger motors, such as robot drives, flying cars, wheel hub motors, etc.
The current mainstream mass power density of motors in the industry is around 6kW/kg. Before the Quark electric drive, the crown on the mountain of motor power density belonged to Lucid from across the ocean. The 499kW motor only weighed 74kg, and the power The density reaches 7kW/kg. I was also shocked when I saw Lucid's compact motor.
But compared to the Quark electric drive released this time, the technology has risen to another level. When the peak power reaches 260kW, the single motor of the Quark electric drive product released this time weighs only 21.5kg, and the mass specific energy density reaches an astonishing 12kW/kg. It’s no wonder that the official 28nm chip process suddenly jumped to the 3nm era as an analogy.
Although there is no publicity, the volumetric power density of the Quark motor is also very good. Thanks to its patented X-PIN flat wire stator technology and carbon fiber high-speed rotor technology, the electric drive power is increased by more than 30% while reducing the volume by 25%. The product mentioned at the press conference has a stator winding diameter of 180mm, a length of 109mm, and a volume of only 2.55L. If calculated based on this volume, its volumetric power density exceeds 100kW/L, which is higher than the U.S. Department of Energy DOE in new energy. The 50kW/L target value mentioned in the 2025 technical indicator plan for automotive motor electronic control has doubled.
Of course, the stator winding of the motor is also composed of a casing, water channels, bearings, etc., which is larger. The actual volume power density will definitely be smaller, but it is still surprising enough.
The Quark motor not only makes the motor smaller and lighter, it also greatly improves the efficiency of the motor. The peak efficiency is 98.5%, and the operating efficiency (most likely CLTC operating condition) is 97.5%. The achievement of high energy efficiency is due to the development of a new type of stator core material and batch preparation technology - "nanocrystalline-amorphous" alloy.
The molten metal is cooled at an extremely high speed of 1 million degrees Celsius/s, thereby destroying the crystal structure inside the metal, and then after heat treatment, "nanocrystalline-amorphous" is formed, with atomic disordered arrangement. , Microscopic properties without grains or grain boundaries. This material has lower iron loss than the silicon steel sheets used in ordinary iron cores, because the iron loss caused by the alternating magnetic field, that is, the loss caused by the alternating magnetic field, is reduced by 50%.
It should be noted that Quark Electric Drive is not the name of a certain electric motor, but a new generation of high-performance integrated electric drive technology group from Aibo, which can be understood as a platform. The motor power of this platform covers 70-320kW. In addition to the "nano-crystalline-amorphous" iron core mentioned above to reduce iron loss, X-PIN flat wire winding and carbon fiber high-speed rotor technology have respectively brought higher Tank full rate, and higher speed (the grapevine shows 21000rpm).
Copper loss, another killer of motor efficiency, is the energy loss caused by the heating of current in the wires. Aian also brought a solution: a high-efficiency silicon carbide controller. Its full power operating voltage reaches 900V, and its efficiency is as high as 99.8% if only the controller is included. Aian is also deeply involved in the construction of the SiC industry chain and develops its own packaging design. Breakthroughs are made from four directions: chip layout, current sharing consistency, reduction of chip switching delay, and stacked power circuit design. At the same time, combined with the innovation of all-silver precise low-temperature sintering process, the SiC module circuit noise is reduced by more than 50% and the thermal resistance is reduced. By about 25%, the chip's flow capacity is increased by more than 10%, and the power cycle life is increased by about 100%.
Ion’s Hyper GT will be the first product to be powered by Quark electric drives, while Hyper SSR will be equipped with three Quark electric drives, thus entering the 1-second club, with an acceleration of 100 kilometers per hour in 1.9 seconds.
The author of this article is Kichebang Route 64
This article is from Kichebang, the author of Yichehao. The copyright belongs to the author. Please contact the author for any form of reprinting. The content only represents the author's opinion and has nothing to do with Bitauto