In order to gain an in-depth understanding of the development trend of electric drive products for new energy passenger vehicles, this paper firstly introduces the characteristics of electric motors and motor controller products in the electric drive system of new energy passenger vehicles, covering the overall trend, technical routes, enterprise competition pattern, and product supporting features. Secondly, the development trend of the electric drive industry has been proposed, which will still be a highly competitive and low value-added industry. There are more new trends in electric motors and motor controllers, such as high-integration, high-reliability and high-pressure. Moreover, electric drive enterprises and products will make substantial progress when going overseas. Finally, relevant suggestions are put forward for the development of the electric drive industry, and it is recommended to strengthen the research on market strategies for cutting-edge technology layout and product supply.

The application of digital projection technology promotes the intelligent development of automobile headlights. In order to explore the new generation of car headlight technology, this article outlines the development history of automotive headlights. By studying the current status of digital projection headlights, three digital projection headlight technology solutions, DLP, Mirco LED, and LCD display, are compared and analyzed. The development trend of array projection headlights is also discussed, in order to provide reference for related research.

Safety reliability, and driving range are critical considerations that impact consumer decisions in the electric vehicle market. Battery capacity and safety serve as principal metrics for evaluating the dependability of electirc vehicles. In order to enhance the battery capacity and safety reliability of electric vehicles and consolidate China’s leading advantage in new energy vehicles, this paper conducts a comparative analysis of the features of liquid and solid-state batteries of electirc vehicles, delineates the benefits and technical pathways of solid-state batteries, and identifies the challenges and strategic solutions in the advancement of solid-state battery technology. The paper concludes with an analysis of the capacity planning for the commercial deployment of solid-state batteries, offering insights for further research in the field.

Through the comparative analysis of cell base materials, various cell integration technologies, and lightweight battery housing solutions, the technical paths for battery density enhancement are elaborated. The improvement in energy density of individual battery cells heavily relies on significant breakthroughs in basic material science. In the post-lithium-ion era, cell densities are expected to reach 1200 W·h/kg, while in the short term, semi-solid battery technology with a cell density of 360 W·h/kg is anticipated to be the first to achieve mass production, enabling electric vehicles with longer driving ranges and higher energy efficiency. Another key technology is to improve cell integration efficiency. Innovative solutions such as Cell-to-Pack (CTP), Cell-to-Chassis (CTC), and Cell-to-Body (CTB) are anticipated to increase cell integration rates to 90% and space utilization to 70%, breaking traditional design limitations and significantly enhancing battery pack energy density. The lightweight design of battery housings is also essential. Lightweight housing design like aluminum alloy extruded profiles, aluminum alloy integrated die-casting, ultra-high-strength steel rolling, and carbon fiber composite materials molding can effectively reduce the overall weight of battery while ensuring performance, thus improving energy density.

Lightweight is one of the key technologies to improve the range of new energy vehicles. How to achieve a balance between cost and weight reduction is a challenge faced by major car companies. By collecting and organizing lightweight manufacturing, assembly, and design technologies, feasible technical solutions are explained through examples of typical parts in the body, interior and exterior decorations, chassis, and three electrical fields. Research suggests that lightweight materials and component structure optimization are generally used to achieve light weighting. Among them, steel aluminum hybrid body, integrated die-casting, and component integration design are currently hot topics and also the direction for the development of vehicle weight reduction technology.

In order to improve the safety performance of automobiles and provide effective data support for the evaluation of automobile safety performance, the relevant requirements of the national standard GB 39732—2020 “Vehicle Event Data Recording System” for the data recorded by EDR are deeply analyzed, and the compliance judgment of EDR data of different manufacturers and models under various working conditions is carried out. The results show that the data that must be recorded according to the standard GB 39732 for all vehicle models is generally complete, but there are still imperfect data records under special driving conditions. Finally, some suggestions are put forward for the data that should be included in the recording scope of new energy vehicles when accidents occur.

As a key technology of next-generation power battery, solid-state batteries can meet the full-scene, all-climate, and high-safety requirements of new energy vehicles. To support the high-quality development of the solid-state battery industry, it is essential to systematically sort out the main technical routes of solid-state batteries, as well as the policy support and development status of domestic and foreign enterprises. The common technical and cost-related problems in the industry should be identified. The development of China’s solid-state battery industry is confronted with challenges such as patent constraints, an incomplete standard system, and potential impacts on existing liquid-state battery industries. In the future, it is urgent to plan and coordinate efforts, mobilize industry forces, and take multiple measures to accelerate the technological breakthroughs and industrial application of solid-state batteries.

The integrated die-casting technology for new energy vehicles has led the innovation in vehicle manufacturing processes. To address the dual objectives of vehicle lightweighting and cost control in new energy vehicles, the crucial role of aluminum alloy materials in the process of automobile lightweighting is elaborated. It dissects the principles, benefits, and drawbacks of the integrated die-casting process, alongside its current adoption in both domestic and international contexts. The paper also delves into the technological challenges in material development and process innovation within integrated die-casting. Additionally, feasible suggestions for the development and application of integrated die-casting technology are put forward, aiming to promote the widespread application of aluminum alloy materials in automobile manufacturing and provide powerful references for the lightweight, energy-saving, and environmentally friendly development of the autombile industry.

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.

This paper aims to study the causes, key influencing factors, and failure modes of fire accidents in new energy passenger vehicles from a holistic perspective, and to supplement the causes of fire accidents beyond battery-related issues based on user usage scenarios, and identify preventive solutions. In this paper, an in-depth statistical analysis is conducted on fire accidents involving new energy vehicles from 2021 to 2022. The user scenarios and the root causes of these fire accidents are summarized. The failure modes at a deeper level and the causes of some typical accident cases are analyzed. The prevention of fire accidents at the design level is discussed. Several solutions are provided, and discussions are held on the research direction of vehicle safety for new energy vehicles.