The P2 hybrid system is a mainstream technical solution to realize eletrifcation for traditional longitudinal vehicles, with the advantages of low fuel consumption and long driving range. This paper combines the vehicle simulation analysis and big data statistics of different vehicle working conditions to compare the working characteristics of the P2 hybrid system and the fuel saving effect under different driving conditions so as to provide some references for the development of P2 hybrid system. The fuel efficiency of P2 hybrid vehicles is closely related to the actual driving conditions of users compared to traditional fuel vehicles, and has obvious fuel saving advantages in urban congested road conditions. However, the P2 hybrid system has a higher cost and does not have an advantage in terms of user usage cost.

In order to solve the problem that the lithium-ion batteries’ charging capacity decreases in cold environments, this paper analyzes the low temperature charging methods of lithium-ion batteries, and studies the impact of the differences in charging methods of lithium-ion batteries for pure electric vehicles at low temperatures on the battery temperature rise rate, and puts forward suggestions on improving the low temperature charging rate of batteries and the low temperature charging capacity of pure electric vehicles.

Through literature review, the advantages of military hybrid electric vehicles are summarized, the performance and characteristics of advanced military hybrid electric vehicles at home and abroad are compared and analyzed, and the common problems of military hybrid electric vehicles are sorted out: the safety of the battery cannot be guaranteed, the life of the motor is susceptible to harsh environment, and the cost is high. Looking forward to the development trend of military hybrid vehicles, the results show that the performance of military hybrid vehicles will be more balanced in the future, the tandem configuration and electric wheel drive are the future development trends, and unmanned ground vehicles will play an important role in the future military field.

With the rapid development of New Energy Vehicle (NEV), power batteries have also realized large-scale development and application. The fast development of power batteries has caused the shortage of battery resources, excessive energy consumption, and the battery scrap has had a negative impact on the environment as well. The green design of power battery products is an effective method to solve the issue of this series. By reviewing many literatures, the evaluation methods and green design methods of green design are analyzed, and the current status and development of green design of power batteries are analyzed and summarized. The results show that compared with passive green design strategy, the active green design strategy of power battery has better economy, higher resource utilization and lower energy consumption, and has more development potential.

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.

The concepts, features and development status of flying vehicles at home and abroad are elaborated, and the flying vehicles are classified according to the application scenarios, propulsion, take-off and landing modes. Through the analysis of the application of flying vehicles in urban and mountainous areas, it is proved that flying vehicles play a vital role in urban traffic congestion, special scenes and emergency rescue. The development of flying vehicles in the low-altitude field is one of the important development directions of 3-dimensional smart transportation in smart cities, and the development of flying vehicles faces major opportunities and challenges in electrification technology innovation and air traffic control.

The Intelligent and Connected Vehicle (ICV) is a key field of innovation and development of domestic and international technology industry, and has become a major strategic direction of global automobile industry development. Taking the policy management and industrial layout of Japan’s intelligent connected vehicle industry in the past 10 years as the research object, the study summarizes the functions and responsibilities of the various management departments, the layout of the industrial structure and the level of technological development of Japan’s intelligent connected vehicle industry, and makes predictions on its future development focusing on trends by comparing the development progress of different applicable fields of its smart Internet-connected vehicles and taking the current social conditions of Japan as the reference object. It also proposes suggestions for the development of China’s intelligent connected vehicle industry.

This article analyzes domestic policies and standards in depth, summarizes typical scenarios in testing requirements, explores process planning methods for intelligent networking test sites based on the development of existing products at both ends of the vehicle and road, analyzes component elements such as scenario layout, test zoning, and road type, and provides technical ideas and planning references for the planning and construction of intelligent networking test sites.

In order to fully exploit the lightweight potential of micro-foaming process in parts of passengercar, the principle, application and prospect of micro-foaming process are analyzed. At present, some interior and exterior parts of passenger cars can be molded by this process, such as instrument panel skeleton, door guard plates, engine decorative covers, etc., which can realize 5%~20% weight reduction of passenger cars and perform good dimensional stability with no need to modify the mold repeatedly.

In order to trace the source of volatile organic compounds ( VOCs ) of a vehicle, 10 vehicles with the same configuration are tested for volatile organic compounds ( VOC ), and the volatile characteristics of vehicle VOC are discussed. The VOC test is carried out on the 16 types, configuration and process consistent parts and their raw materials in the sample vehicle. The traceability analysis of the test results is carried out to identify the parts and their raw materials that contribute greatly to the VOC content in the vehicle, and provide data support for improving the air quality in the vehicle.