Electric vehicle range extender controller

Abstract

The invention provides an electric car range extender controller. The electric car range extender controller comprises a hardware, a range extender control strategy and a bottom driver. A hardware module mainly comprises a signal input processing module, a power supplying module, a main control chip and a CAN communication module; and the main control chip is connected with the signal input processing module, the power supplying module and the CAN communication module in a circuit connection mode, according to signals transmitted by the signal input processing module, based on a preset APU control strategy, a engine target rotating speed signal, a motor target torque signal, an APU failure signal, an APU allowed maximum output power value, an APU allowed maximum output torque value and an APU allowed maximum output rotating speed value are generated, and the generated signal parameter values are transmitted to the CAN communication module through the bottom driver. According to the electric car range extender controller, the reliability of the hardware is high, and the task processing speed is high; and the range extender control strategy can achieve more accurate controlling over a range extender engine and a motor, and the fuel economy is enhanced, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicle energy control, in particular to a controller for an electric vehicle range extender. Background technique [0002] Energy is an important material basis for economic growth and social development of a country or region. Since the beginning of the 21st century, the level of science and technology in our country has been continuously improved and the economy has developed rapidly. At the same time, the ever-increasing demand for energy makes my country more and more dependent on energy imports. The sharp increase in carbon emissions has increased the pressure on the environment, which has made the development and changes of my country's energy demand and carbon dioxide become the focus of attention of all parties. Climate change issues; excessive use of fossil fuels and energy consumption in the transportation industry place a heavy burden on the environment. [0003] As one of the potent...

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Problems solved by technology

[0007] (1) In terms of the software design of the vehicle controller, the current domestic software design has realized its functions, but there is still a gap with foreign countries in terms of fault diagnosis software function design, vehicle safety control strategy research, etc.;

[0008] (2) In terms of the hardware design of the vehicle controller, there is a clear gap between China and foreign countries in terms of core chip R&D, manufacturing, and function integration, and the stability and reliability of the controller still need to be improved;

[0009] (3) In terms of software development, most domestic automobile manufacturers and colleges and universities adopt the "V" development model to realize the development of vehicle controllers, but there is still a lack of auxiliary tools in terms of production, manufacturing and after-sales services;

[0010] (4) In terms of industrialization, the domestic electric vehicle technology is in the early stage of research and development, the research and development time is short, and the breakthroughs in key technologies such as power batteries are relatively small. Although there are subsidies from the national government departments, the cost of pure electric vehicles is high, although some cities have achieved However, the vehicle penetration rate is not high and the development is relatively slow, which indirectly affects the improvement of the research and development level of vehicle controllers

Several existing range-extended electric vehicles, whether they are mass-produced or experimental vehicles, all divide the range extender part of the electric vehicle to the vehicle controller for management, but this method has very serious disadvantages, because the vehicle controller runs the code The amount is large, and the operating speed will vary with different tasks. The control of the vehicle controller on the range extender is affected by the task management of the vehicle controller. When there are many tasks, the control of the engine and motor of the range extender will lag. Not only affects the fuel economy of the engine, but also affects the life of the power battery

In addition, this integrated form has a high failure rate, low reliability, high bit error rate, relatively low control reliability, and is prone to danger. When the vehicle controller fails, the engine of the range extender is out of control, which is very Flying may occur and damage the entire vehicle, causing great losses. Therefore, it is imperative to develop a dedicated controller for the range extender of electric vehicles

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