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.

With the growing demand for the integrated development of vehicle intelligence and connectivity, China has taken the lead in proposing the Vehicle-Road-Cloud integration development path, aiming to accelerate the deep integration and exploration of vehicle intelligence and connectivity. Grounded in systems engineering methodology, the paper adopts the Vehicle-Road-Cloud Integrated System (VRCIS) as its research framework. First, it explores the benefit of VRCIS development and evaluates the feasibility of application scenarios to address current technical problems. Secondly, it classifies the application scenarios, based on the connected capabilities of the VRCIS and summarizes the table of connected scenarios, by reviewing international research and practices. Thirdly, the paper analyzes the three developmental stages of cooperative connected autonomous driving and generates corresponding functional scenarios based on the summarized connected scenarios. Finally, the development path for the Vehicle-Road-Cloud integrated scenarios is proposed, guiding future technological evolution and implementation.

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.

The technology of Simultaneous Localization And Mapping（SLAM）is the hot and difficult point of current research. It is one of the key technologies to realize unmanned driving. The paper introduction is centered on the principle, basic structure, sensors used and map types of SLAM and analyzes the advantages, disadvantages and scope of application of various fusion methods. Secondly, according to the different fusion methods used, it introduces the current status of research at home and abroad, and points out its worthwhile affirmation and continuation of the technology as well as shortcomings. Finally, it summarizes the current problems of multi-sensor fusion unmanned SLAM research, analyzes the research difficulties and puts forward suggestions on the possible development direction of future research, with the aim of providing references for the development of unmanned driving.

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.

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.

The steer-by-wire technology is the key technology for the future development of pure electric vehicles, as the key execution system of the X-by-wire chassis, the mechanical connection is canceled, the steering operation is directly transmitted by electrical signals, the control mode is more flexible, the modular structure can be realized, the coupling and control freedom between the steering system and other subsystems of the chassis are improved. Therefore, the steer-by-wire system is an important part of the drive-by-wire chassis system. In order to provide a useful reference for R&D units and enterprises related to steer-by-wire technology, this paper uses patent analysis method to sort out key technical points in steering strategies, integrated systems and other aspects from the perspective of patent disclosure trend and patent technology composition. This paper also analyzes the development status of steer-by-wire technology of pure electric vehicles from macro and micro perspectives, proposes the key directions for future patent layout in the field of steer-by-wire for pure electric vehicle in China.

In order to analyze the crucial role of the Steer-By-Wire (SBW) system in intelligent driving and its integrated application with the chassis control system, this paper focuses on the architecture and functions of the SBW system, including the fully redundant hardware architecture and variable steering ratio function. It also explores the vehicle application of the system, such as the calibration of the variable steering ratio and the matching of road-feel feedback. The paper also proposes an optimal basic road-feel feedback function scheme, as well as processes and methods for vehicle application suitable for the variable steering ratio and road-feel feedback of the SBW system, providing technical support for the development and engineering application of the SBW system.

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.