Key technologies of new energy vehicles

Electric vehicles are divided into two categories according to the electrification level of the power system: one is electric vehicles that are mainly driven by motors under all or most working conditions (called “pure electric drive” electric vehicles, such as pure electric vehicles, plug-in electric vehicles). Hybrid electric vehicles, extended-range electric vehicles and fuel cell electric vehicles); the other type is electric vehicles with small power battery capacity and mainly powered by internal combustion engines under most working conditions (called conventional hybrid vehicles).

Key technologies of new energy vehicles
New energy vehicle technology route

(1) Battery.
With the power battery module as the core, the energy-based power battery for vehicles as the main development direction, taking into account the development of power-type power batteries and supercapacitors, and comprehensively improving the input and output characteristics, safety, consistency, durability and cost-effectiveness of power batteries. The integration of chemical power battery system and integrated thermo-electric management technology promotes the development of power battery modular technology; realizes the standardization, serialization and generalization of vehicle power battery modules, and provides guarantee for supporting the commercial operation mode of pure electric drive electric vehicles. Aiming at international cutting-edge technologies, we will carry out in-depth research on the independent innovation of next-generation vehicle power batteries, and reserve technology for the medium and long-term development of the electric vehicle industry. Focus on research on new lithium-ion power batteries. Research new lithium-ion power battery design, performance prediction, safety evaluation and new safety technologies. In terms of new system power batteries, focus on researching metal-air batteries, multi-electron reaction batteries and radical polymer batteries, etc., and through experimental technology verification, establish a power battery innovation and development technology research and development system.

Break through the key technology and system integration of fuel cell, promote practical engineering, and lay the core technology foundation for the development and industrialization of a new generation of fuel cell vehicles. Focus on promoting the practical application of fuel cell engineering, establishing a small batch production line, further improving fuel cell performance, reducing costs, strengthening the life assessment of the stack and system, improving the control strategy of the fuel cell system and the performance of key components, and improving the reliability of the fuel cell system And durability, providing a reliable vehicle fuel cell system for fuel cell vehicle demonstration operation. Strengthen the technological innovation of fuel cell basic materials and system integration, and develop key materials and components with high stability, high durability and low cost. Ensure the uniformity of the stack at high current density, increase the power density, and further enhance the environmental adaptability of the system, laying a core technical foundation for the development of next-generation fuel cell vehicles.

(2) Motor.
Facing the large-scale industrialization demand of hybrid power, develop hybrid power engine motor assembly. Facing the large-scale commercial demonstration needs of pure electric drives, develop pure electric vehicle drive motors and their transmission system series, and simultaneously develop supporting engine generator sets auxiliary power unit (APU) series, in order to realize the large-scale commercialization of pure electric vehicles Demonstration provides technical support. Facing the next generation of pure electric drive system technology research, starting from new materials, new structures, self-sensing motors, insulated gate bipolar transistor (IGBT) chip packaging and drive system hybrid integration, new transmission structures, etc. Develop power electronics, motors and transmission technologies with high efficiency, high material utilization, high density and adapt to extreme environmental conditions, and explore the next generation of vehicle motor drive and transmission system solutions to meet the sustainable development needs of electric vehicles.

(3) Electronic control system.
Focus on the development of advanced control algorithms for hybrid power engines, advanced real-time control network protocols for hybrid power systems, torque coupling between multiple components and dynamic coordination control algorithms, and develop high-performance hybrid power system (complete vehicle) controllers to meet the needs of hybrid vehicles Large-scale industrialization technology needs. Focus on the development of advanced distributed, high fault-tolerant and strong real-time control systems for pure electric vehicles, high-efficiency, intelligent and low-noise electric assembly control systems (electric air conditioning, electric steering, braking energy feedback control systems), and electric vehicles In-vehicle information, smart charging and remote monitoring technologies meet the needs of large-scale demonstration of pure electric vehicles. The focus is on the development of integrated chassis dynamics control based on a new type of motor integrated drive, high-performance next-generation vehicle controllers and their dedicated chips, electric vehicle intelligent traffic system (ITS) and vehicle network integration technology (vehicle to X) , V2X) to provide technical support for the development of the next generation of pure electric drive vehicles.

(4) Hybrid vehicles.
In response to the large-scale industrialization needs of conventional hybrid electric vehicles, develop a series of hybrid power system assembly development, coordinate control and energy management and other key technology research and industrialization technology research and development of complete vehicle products, and integrate the development of energy-saving and environmentally friendly engines with electrification technology. Combine, focus on breakthroughs in product cost-effectiveness, and form a competitive advantage in the market. Break through the key technologies of the industrialization of hybrid electric vehicles, build a supporting system for the development of production equipment and technology, quality management system, and supporting maintenance and testing equipment for hybrid electric vehicle parts, and build a dedicated assembly, testing, and inspection production line for hybrid electric vehicles.

In terms of moderate hybrid power, breakthroughs in key technologies of hybrid electric vehicles, deepening the research of engine control technology, solving power source working state switching and dynamic coordinated control, as well as energy optimization management, mastering vehicle fault diagnosis technology, and further improving the reliability of the vehicle. Durable and cost-effective, we have developed a series of hybrid vehicles with high cost-effectiveness, market competitiveness, and large-scale industrialization.

In terms of deep hybrid power, breakthrough hybrid power system configuration technology and energy management coordinated control technology, develop new deep hybrid power configurations, and develop deep hybrid cars and commercial vehicles that are cost-effective and can be mass-produced.

(5) Pure electric vehicles (including plug-in/extended range electric vehicles)
Taking the research and development of key technologies for small pure electric vehicles as a breakthrough in the industrialization of pure electric vehicles, develop a series of pure electric small vehicles (including extended range), and realize large-scale commercial demonstration; develop pure electric commercial vehicles in the public service field and large-scale commercial demonstrations Promotion: Strengthen the research and development of plug-in hybrid electric vehicles, and develop a series of plug-in hybrid electric vehicles and commercial vehicle products.

For small pure electric vehicles, in response to large-scale commercial demonstration needs, develop a series of characteristic pure electric-driven vehicles and their energy supply systems, and explore new commercialization models. Achieve breakthroughs in key technologies for small pure electric vehicles (including program extensions), focusing on technologies such as electrical system integration, power system matching, and vehicle thermoelectric integrated management. Developed a series of small pure electric vehicles that are comfortable, safe, and cost-effective.

For pure electric commercial vehicles, the focus is on vehicle noise, vibration and harshness (noise, vibration.harshness, NVH) lightweight, thermal management, fault diagnosis, fault-tolerant control, electromagnetic compatibility and electrical safety technology.

For plug-in hybrid vehicles, master plug-in hybrid configuration and special engine system research and development technology; breakthrough high-efficiency electromechanical coupling technology, lightweight, thermal management, fault diagnosis, fault-tolerant control and electromagnetic compatibility technology, electrical safety technology, development Develop a series of plug-in hybrid cars and commercial vehicles that are cost-effective and can meet the needs of large-scale commercial demonstrations.

(6) The next generation of pure electric vehicles represented by fuel cell vehicles.
Integrate the next-generation high-performance motor and battery system, and break through the key technologies of the next-generation high-performance new pure electric car power system technology platform. By about 2015, complete the next-generation high-performance, pure electric drive power system technology platform, and complete the pure electric drive car And the next generation of high-performance large-scale pure electric passenger vehicle product development, the technical level is at the international advanced level. Facing the breakthrough demand of high-end cutting-edge technology, based on the fuel cell engine technology of high power density, long life and high reliability, breakthrough key technologies such as the coupling safety of new hydrogen-electric structure, and overcome the new all-electrified chassis drive system platform technology that adapts to the supply of hydrogen energy Develop fuel cell cars and buses that reach the international advanced level, and conduct demonstration assessments; master on-board hydrogen supply system technology, realize independent development of key components, master next-generation fuel cell vehicle power system platform technology, and develop next-generation fuel cell cars And passenger car products, and conduct operational assessments.