电动汽车动力系统设计开题报告

1. 研究目的与意义（文献综述）

The "13th Five-Year Plan" outlines the implementation of new energy vehicle promotion plans and vigorous development of pure electric vehicles and hybrid vehicles. At present, “inconvenient charging”, “short range”, “poor power performance”, and “immature technology, quality and safety concerns” have become the soft underbelly of the development of new energy vehicles. Therefore, during the "13th Five-Year Plan" period, driven by the huge market, electric vehicles must make breakthrough progress in terms of range, economic performance, and power performance.In addition to the main evaluation indicators for the performance analysis of diesel locomotives, the dynamic performance and economic performance are also the main evaluation indicators for the performance analysis of pure electric vehicles. Power performance is mainly reflected in the driver's requirements for power performance such as acceleration and climb of electric vehicles, as well as the limits that pure electric vehicles can reach during driving. Economic performance reflects the power consumption level of pure electric vehicles. At present, in the development of pure electric vehicles, the economic level of pure electric vehicles has become an important indicator of the technical level of electric vehicles. Therefore, in the analysis of power performance of pure electric vehicles, the evaluation indicators are maximum speed, acceleration performance and climbing performance. The matching and design of pure electric vehicle powertrain parameters mainly consider two aspects of power performance and economy. In an effective working range, it meets the basic requirements of power performance and reduces energy consumption as much as possible.

As early as 1830, Scottish inventor Robert Anderson successfully mounted an electric motor on a carriage. Later, in 1842, and in collaboration with Thomas Davenport, the first battery-powered electric car was created, which has since established a history of electric cars. With the advancement of battery technology, many western countries have successively manufactured electric vehicles.From the end of the 19th century to the beginning of the 20th century, electric vehicles were widely used in Europe and the United States. However, due to the dramatic improvement of internal combustion engine technology and the large-scale extraction of oil, the automobile market was quickly occupied by diesel locomotive. Electric vehicles were due to large battery weight, low energy density, long charging time, short mileage and short service life, and high manufacturing costs. Gradually fade out of the public eye.Since the 1980s, Mercedes-Benz, Toyota, Honda, General Motors and other auto companies have conducted research on fuel cell electric vehicles for nearly 40 years. Related matching design techniques are not yet complete.Since the end of the 1980s, energy conservation and environmental protection have become major social issues of concern to countries all over the world. At the same time, with the development of science and technology, especially the development of new high-energy battery technologies, the driving range of electric vehicles has been greatly improved, and the charging time Shortening, electric vehicles have entered a new stage of development, and began to enter the stage of practicality.

2. 研究的基本内容与方案

main research content

（1）match and select the power system according to the basic parameters and design goals of the vehicle.

（2）in order to verify the rationality of the power system design, a vehicle performance simulation software is used to establish a vehicle model of the electric vehicle.

3. 研究计划与安排

1-2（7 semesters 19-20 weeks）：determine the topic of graduation design, improve the task book of graduation design (related parameters), and the collection of school data.

3 (the first week of 8 semesters): scheme idea, literature search, and completion report.

4 to 5 (weeks 2-3 of 8 semesters): foreign language translation and data collection.

4. 参考文献（12篇以上）

[1] zhang wei. design and research of power system of range-extended fuel cell electric vehicle [j]. automobile practical technology, 2019.

[2] sudan. design and optimization of pure electric vehicle power system based on genetic algorithm [j]. information communication, 2019.

[3] zhao lijun, qi qinzhi. structure and principle of electric vehicles [m]. beijing: peking university press, 2012.