This article investigates a front-wheel-drive battery electric vehicle. Using the coast-down resistance curve obtained from on-road tests, energy-flow measurements were conducted on a chassis dynamometer under both a standard ambient driving cycle and the subsequent ambient-temperature charging process. The results indicate that the efficiencies of the electric drivetrain, on-board charger, and battery pack during charge/discharge are within normal ranges, whereas the brake-energy recuperation rate is low and losses due to rolling resistance and aerodynamic drag account for a significant proportion of the total energy expenditure. Without altering the exterior styling, the optimisation effort therefore focused on reducing the tyre rolling-resistance coefficient and recalibrating the coast-down braking-torque map. Experimental validation shows that the recovered brake energy increased from 10.689 kW·h to 12.427 kW·h a gain of 16.3% and the driving range improved from 389 km to 410 km, corresponding to a 5.4 % enhancement.

Under the background of the rapid development of the new energy vehicle industry,the performance of the battery thermal management system has become the core factor determining the safety of the battery and the overall performance of the vehicle. In response to the shortcomings of traditional systems such as low integration, poor coordination, and insufficient energy efficiency, this article has developed a four-in-one electronic control system integrating a 5.5 kW frequency converter, a 1.5 kW adjustable voltage DC/DC power supply, a 24 kW high-efficiency PTC drive module, and a CCU controller. Through the integration design, intelligent control strategy, and the integration of cloud intelligent control platform technology, real-time monitoring of battery temperature, precise regulation, and full life cycle management are achieved. Real vehicle verification shows that this system has the advantages of high integration, high reliability, small size, and lightweight, with a temperature control error of ≤±0.5 ℃ , and an energy efficiency improvement of more than 31%, effectively reducing the risk of thermal runaway, and providing technical support for the independent control of core components of new energy vehicles.

This article comprehensively reviews the mainstream technological paths and design progress of electric vehicle sunroofs, with a focus on analyzing the technical implementation mechanism, adjustment mode, and practical application scenarios of zone dimming sunroofs for luxury car models. By combining the development trends of materials science and intelligent interaction technology, this paper further explores the future evolution directions of "infinite zone dimming", "large screen visualization precise control", and "multimodal human-computer interaction integration" for car mounted sunroofs. The research results of this article can provide reference for technical research and development, product design optimization, and industry standard construction in the field of car canopy.

Traditional automotive lead-acid batteries are housed in the engine bay, whereas the new low-voltage lithium packs are installed under the rear seats or trunk floor. Because the lithium battery 's negative terminal is hidden and out of reach, it cannot be disconnected manually like its lead-acid counterpart. To solve this problem, the paper presents a diagnostic-software-controlled on/off scheme: a software command opens the low-voltage circuit, and a hard-wired wake-up provided by an exposed tailgate switch and a dedicated OBD plug-re-closes it. This allows service technicians or end-of line testers to power-cycle the battery quickly, eliminating repeated manual removal of the battery.

The cooling structure of the power battery in new energy vehicles is crucial for ensuring that the battery maintains an appropriate working temperature under various working conditions. An efficient cooling system not only helps to extend battery life but also enhances the safety and performance of the vehicle. The influence of cooling technology on power batteries, the development of battery cooling technology and the design requirements of power battery cooling structures were analyzed. In response to the technical deficiencies in the existing cooling structure, a new type of cooling structure for the power battery of new energy vehicles has been designed and developed, which solves the problem that two sets of filter screen assemblies need to be driven in sequence during the vibration cleaning of the power battery, resulting in low cleaning efficiency of the filter screen assemblies, and improves the cooling efficiency.

Under the global energy transition and environmental protection pressures, new energy vehicle testing technology has become a key support for industrial development. This paper reviews the current testing for power batteries, drive motors, and whole vehicle performance, identifies current challenges such as lagging standards, insufficient specialized equipment, and a shortage of talent, and looks to future trends including intelligence, standardization, integration, and big data application, aiming to promote the healthy and orderly development of the industry.

In view of the problems such as large mode-switching impact and unreasonable torque distribution in the dual-motor coupled drive system of electric vehicles, this paper proposes a dynamic coordination control method for the dual-motor coupled drive system of electric vehicles. By establishing a dynamic model, designing multi-mode torque dynamic allocation rules and multi-mode switching coordination control algorithms, the comprehensive effects of improving the vehicle's economy, dynamic response and smooth mode-switching are verified under common vehicle operating conditions and power conditions.

Under the dual-carbon goals, the development of the new energy vehicle industry has been rapidly advancing. The powertrain serves as the core of new energy vehicles, and whether automated control technologies in this field can be innovatively applied directly impacts the enhancement of vehicle performance, energy efficiency, and driving safety. This paper reviews the application value of such technologies within the powertrain, analyzes their innovative forms in areas like integrated intelligence, motor drive, and battery management, and evaluates the practical effects of technology implementation through benchmark cases of pure electric vehicles. The study finds that automated control technologies have penetrated all core modules of the powertrain, not only improving system operational efficiency but also significantly elevating the overall intelligence level of the vehicles.

In response to the problems of poor safety, low efficiency, resource waste and environmental pollution that exist in the traditional logistics mode for high-voltage electrical components of new energy vehicles, this article adopts the system analysis method to sort out the entire logistics process of high-voltage electrical components, and constructs a comprehensive green logistics system framework centered on green packaging, green transportation, green storage, green management and reverse logistics. This system can significantly reduce the carbon footprint, improve the safety and efficiency of logistics operations, and create new economic value through resource recycling.

Addressing the issues of low efficiency in model change and complex program modification in multi-type motor testing on NI-based motor test benches, this paper investigates test bench control technology. This study elaborates on the dynamic parsing principle of DBC files based on NI-XNET, introduces a method for rapid switching of test recipes through flexible control, optimizes the motor speed regulation and loading control strategy, and effectively enhances the adaptability and testing efficiency of the test bench.

Under high-rate operating conditions, the risk of thermal runaway in power batteries increases, highlighting the critical role of thermal management structural design. Current liquid cooling systems suffer from high flow resistance, while lightweight battery enclosures face constraints due to vehicle safety requirements. This paper achieves optimal flow channels through channel reconstruction and fluid dynamics analysis. Iterative topology optimization is applied to directionally optimize microchannels, while composite materials replace metal components to overcome weight reduction limitations. Simulation results demonstrate that the redesigned mechanical structure reduces power consumption while enhancing flow field temperature uniformity and mechanical stiffness, providing a reliable engineering paradigm for battery protection.

In order to meet the requirements of new energy vehicle BMS for real-time data, reliability and security, this paper systematically analyzes the application scenarios and technical characteristics of wired communication technologies such as CAN and Ethernet and wireless communication technologies such as Bluetooth and 4G/5G in BMS. Combining the core functions and communication challenges of BMS, the application methods of communication technology in each function of BMS are analyzed in detail from the aspects of architectural communication, car-cloud communication, wireless BMS, chip support, security, etc., the application technology system of communication technology in BMS is established, and the application fields and characteristics of each communication protocol are determined.