The 800 V high-voltage platform is conducive to solving the problems of slow charging and short driving range of electric vehicles. Therefore, the 800 V electric drive system based on the high-voltage platform has become a research hotspot in the industry. This paper mainly summarizes the latest technical scheme of the 800 V high-voltage platform electric drive system from the industry research background, user development driving force, key core technologies, outlook and summary, combined with engineering practice. It provides comprehensive guidance for the development of high-end automotive electric drive products and technologies. Effectively improve the industry’s understanding of 800 V high-voltage electric drive platform technology, and provide design theoretical support for the development of domestic high-quality electric drive products, creating considerable social and economic benefits.

With the increasing requirements for environmental protection, energy saving and emission reduction, higher requirements are also put forward for electric drive motors of new energy vehicles. High speed, high power density and high compactness have become the main goals of the development of electric drive technology for future vehicles. Among various types of motors, permanent magnet synchronous motors can take into account the requirements of high speed and high power density at the same time, but there are still difficulties in structural design, materials, processing, and cooling of high-speed permanent magnet synchronous motors that need to be overcome urgently. In this paper, the key technologies and development status of high-speed permanent magnet synchronous motors for automotive electric drives are expounded from the aspects of motor structure design, motor control and power devices with a brief analysis of the technical challenges faced by the current automotive high-speed drive motor system design. Last but not least, key issues in the research and development of high-speed motors, focusing on more compact structures, high-strength permanent magnet materials and more precise control, and prospects for the multi-physics and multi-disciplinary research and development of high-speed motors are illustrated.

With the popularization of electrification of passenger cars, its powertrain has also developed from a single Internal Combustion Engine (ICE) to a hybrid power, pure electric and hydrogen fuel cell power and hydrogen ICE power. In the Life Cycle Assessment (LCA) mode, the vehicles matched different powertrains will produce different quantity of CO₂. According to the CO₂ composition and preparation methods of electric energy and hydrogen energy in China, the CO₂ emission for the consumption of unit electric power and unit hydrogen is calculated separately, and the actual CO₂ emission value of passenger cars of different models and different powertrains is calculated. According to the calculation results, under LCA mode, (1) pure electric powertrain can reduce CO₂ emissions by 48%~57% compared with a single ICE powertrain at normal temperature; (2) CO₂ emission can be reduced by 31%~44% at low temperature; (3) under the current mode of hydrogen production, storage and transportation, the CO₂ emission of hydrogen fuel cell power is 10% lower than that of Hybrid Electric Vehicle, and is 1.5~1.6 times that of pure electric vehicle.

In response to carbon peaking and carbon neutrality, the automotive industry has put forward technological roadmaps for new energy vehicles, including technological roadmaps for automotive fuel cells. Under the initiatives of national policies, automotive fuel cell technologies have made certain progress, but there are still many challenges and limitations in the overall strategies and technological roadmaps, especially in the preparation, storage, transportation and utilization of hydrogen energy, where there are many bottlenecks ahead. Ammonia industry has been mature in preparation, storage, transportation and utilization. As a carbon-free fuel, ammonia should be focused as one of the technological roadmaps and directions of green energy. The research status at home and abroad is reviewed, the properties and performance of ammonia fuel are discussed, the future of ammonia energy is prospected, and suggestions for scientific planning and in-depth research on ammonia energy technologies are put forward. Some suggestions are also provided for automotive industry to implement the new energy strategic plan.

As the natural disasters caused by global warming become more and more intense, carbon neutrality as an important means to reduce carbon dioxide emissions is gradually being emphasized. As a key to energy saving and environmental protection, new energy vehicles play an important role in reducing carbon emissions. Aiming at the issue of how to reduce the carbon emissions of new energy vehicles in the carbon neutrality background, this paper is from the perspective of the life cycle assessment of new energy vehicles, mainly focuses on the battery energy density including energy management strategies and regenerative braking energy recovery of electric vehicles. Moreover, hydrogen acquisition, electric catalyst and energy management strategies of fuel cell vehicles, electromechanical coupling technology, energy management strategy and braking energy recovery of hybrid electric vehicles and other aspects are analyzed as well through each respective specific emission reduction measures.

While the development of autonomous driving technology is progressing rapidly, trajectory planning, as an essential part of its decision planning module, has received a lot of attention from scholars. A graphical analysis of trajectory planning research through the CiteSpace bibliometric tool provides some convenience and reference for relevant researchers. The literature of trajectory planning journals included in the Web Of Science(WOS) core collection since 2010 is used as a sample for visualization and analysis, and the overview of trajectory planning research is introduced through bibliometric analysis, and shows the thematic lineage and research hotspots of trajectory planning through keyword co-occurrence analysis and burst detection.

With the gradual development of the new "four modernizations" of the vehicle, the domain architecture has become a new application trend, which puts forward new requirements for the electrical balance between the low-voltage power source system and the power consumption system of the vehicle, to ensure the safety and comfort of the vehicle. In this paper, by referring to relevant literature and previous experience in vehicle power system design and simulation, a domain architecture oriented vehicle electrical balance simulation method is proposed to achieve a fast and efficient evaluation of the vehicle low-voltage power system electrical balance under dynamic working conditions, which can be applied to the guidance of the low-voltage power system design and component selection in the early stage of vehicle development.

Warning triangle platesfor motor vehiclesarecompulsory certification products in China,and its stability against wind is a required test item. However, due to the incomplete description of the test method in GB 19151—2003 Warning triangles for motor vehicle, there is no unified test method, equipment and test norms in automotive industry, result in test precisions are different and low, hence poor repeatability. In this paper, the test method and test equipments are conceived, test norms are developed, and the test scheme is verified by means of simulation. Finally, a test scheme with high precision and strong repeatability is obtained, and prototype equipments are fabricated, the scheme is verified for the test of stability against wind of waning triangle plate, therefore the validity for test method and test equipments are verified.

With the rapid development of vehicles towards intelligence, connection and electrification, the factors affecting the Electro Magnetic Compatibility (EMC) of vehicles are becoming more and more complex. The electromagnetic interference sources and interference characteristics for New Energy Vehicle (NEV) and Intelligent and Connected Vehicle (ICV) are expounded, On the basis of the traditional 3-element analysis of electromagnetic interference, the composition of the influencing factors of vehicle EMC performance is analyzed from the aspects of technical design and development process, as well as EMC performance improvement measures and, suggestions are put forward for EMC development goal setting of vehicle, system and parts, EMC design review and risk avoidance scheme, EMC test standards, test plan and test outline, validation work and improvement for the forward development and design process of automotive EMC.