Downhill energy recovery control method and system for pure electric mining truck

Abstract

The invention relates to an energy recovery method of an electric vehicle, in particular to a downhill energy recovery control method and system for a pure electric mining truck, and aims to solve thetechnical problem that an existing energy recovery method for the pure electric mining truck cannot meet the energy recovery requirement under the condition that the gradient is 15%-50%. The method comprises the steps of collecting whole vehicle information in real time; calculating the vehicle speed, the transmission target gear, the motor braking torque and the recyclable electric quantity under the current slope; judging whether the recyclable electric quantity is smaller than the rechargeable electric quantity of the battery; judging whether the motor braking torque meets the current gearbraking torque requirement of the transmission; determining to start an n-th-gear retarder; judging whether the residual electric quantity of the battery reaches the charging upper limit of the battery; judging whether the current gradient is smaller than a gradient set value; the invention further provides an energy recovery system for realizing the method. The energy recovery system comprises atransmission, a retarder, a whole vehicle mechanical brake, a motor, a motor controller, a battery and a whole vehicle controller.

Description

technical field [0001] The invention relates to an energy recovery method for an electric vehicle, in particular to a downhill energy recovery control method and control system for a pure electric mining truck. Background technique [0002] Most of the energy recovery methods currently applied to pure electric mining trucks are implemented by partial changes on the basis of passenger vehicles. The method of using the motor as a generator for energy recovery can meet general road conditions and better road conditions. But it can't meet the requirements of braking torque and kinetic energy recovery under the situation of 15% to 50% slope of mine truck. Contents of the invention [0003] The purpose of the present invention is to solve the technical problem that the energy recovery system of the existing pure electric mining truck cannot meet the braking torque and kinetic energy recovery requirements when the slope is 15% to 50%, and proposes a pure electric mining truck. S...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the energy recovery system of the existing pure electric mining truck cannot meet the requirements for braking torque and kinetic energy recovery when the slope is 15% to 50%, and proposes a pure electric mining truck. Slope Energy Recovery Control Method and System

Images