A range extender control method and a range extender electric vehicle

Abstract

A range extender control method, comprising: acquiring the vehicle demand energy consumption of the extended-range electric vehicle; collecting an initial SOC value of the battery of the extended-range electric vehicle, and calculating the reduction of the battery from the initial SOC value to The total energy supply of the battery that can be provided at the first preset SOC value; when it is determined that the energy consumption required by the entire vehicle is less than the total energy supplied by the battery, the range extender is in a closed state throughout the whole process; when it is determined that the entire vehicle When the demanded energy consumption is greater than or equal to the total energy supplied by the battery, the range-extended electric vehicle uses the adaptive range-extending mode to collect the real-time SOC value of the battery in real time; when it is determined that the real-time SOC value is greater than or equal to the second preset range. When the SOC value is set, the range extender is in a closed state, and the range extender electric vehicle runs in pure electric mode; when it is determined that the real-time SOC value is less than the second preset SOC value, the range extender is activated, Start powering. Reduce vehicle cost, use cost and layout space requirements.

Description

technical field [0001] The invention relates to the field of hybrid electric vehicles, in particular to a range extender control method and a range extender electric vehicle. Background technique [0002] Compared with traditional vehicles, hybrid vehicles fully absorb the greatest advantages in the electric / thermal system, greatly reducing the fuel consumption and pollutant emissions of the vehicle, ensuring the same performance and advantages, and in Superior energy efficiency and emissions. Hybrid electric vehicles achieve the purpose of improving fuel economy and reducing emissions on the basis of existing technologies, so they have great development prospects. [0003] Generally, the range extender is started based on the battery's SOC (StateOfCharge, state of charge). When the battery is discharged to the point where the SOC falls below a lower threshold, the range extender is started to supply power. At this time, the battery SOC is already low. , can no longer rele...

AI Technical Summary

Problems solved by technology

[0003] Generally, a range-extended electric vehicle starts the range extender based on the battery's SOC (StateOfCharge, state of charge), and then starts the range extender to supply power when the battery is discharged until the SOC is lower than a lower threshold. At this time, the battery SOC is already low , can no longer release higher power to the outside world. The range extender needs to work at a higher power to meet the driving needs and replenish energy for the battery. When the range extender works at a higher power point, its fuel consumption is relatively high, which is not conducive to energy saving. emission reduction

Correspondingly, when selecting the battery and the range extender, it is necessary to meet the peak power requirements of the driving motor when the battery or the range extender is powered separately. However, a large-capacity battery and a high-power range extender will increase the cost and space of the vehicle. The demand increases, and at the same time, the peak electric power when the battery and the range extender work together far exceeds the peak power of the driving motor, resulting in a waste of power in the power system

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