Energy feedback control method for full electric vehicle

Abstract

The invention provides an energy feedback control method for a full electric vehicle. The energy feedback control method includes the following specific steps that on the premise that an accelerator pedal is released and the vehicle is in a forward gear, whether an ABS is started or not is judged, and if the ABS is not started, the vehicle enters a feedback mode; the feedback mode selection step includes the procedures that after the vehicle enters the feedback mode, whether a brake pedal is trodden or not is judged, if the brake pedal is trodden, the vehicle enters a brake feedback mode, if the brake pedal is not trodden, the vehicle enters a sliding feedback mode, a vehicle control unit calculates feedback torque, and recycled energy is stored in a power battery; when the vehicle enters the brake feedback mode or the sliding feedback mode, whether the ABS is started or not is monitored in real time, and if the ABS is started, the vehicle quits from the feedback mode. The feedback torque is determined through the maximal receiving capacity of the power battery, the actual deceleration working condition of the vehicle and the feedback capacity of a motor, and the driving range of the full electric vehicle is prolonged as much as possible on the premise that vehicle safety is guaranteed.

Description

technical field [0001] The invention relates to an energy recovery technology of a pure electric vehicle, in particular to an energy feedback control method of a pure electric vehicle. Background technique [0002] For pure electric vehicles, the most direct way to increase the mileage is to increase the power of the power battery carried in the vehicle, but limited by the low energy density of the current power battery technology and the influence of price and cost factors, the increase in power It will not only greatly increase the cost of the vehicle, but also obviously increase the curb weight of the vehicle, and the increase of the curb weight will directly affect the safety, handling and power economy of the vehicle. To increase the mileage of vehicles as much as possible is a difficult problem that the automotive industry around the world needs to overcome. [0003] Since the motor in a pure electric drive vehicle has the functions of a motor and a generator at the s...

AI Technical Summary

Problems solved by technology

[0002] For pure electric vehicles, the most direct way to increase the mileage is to increase the power of the power battery carried in the vehicle, but limited by the low energy density of the current power battery technology and the influence of price and cost factors, the increase in power It will not only greatly increase the cost of the vehicle, but also obviously increase the curb weight of the vehicle, and the increase of the curb weight will directly affect the safety, handling and power economy of the vehicle. Increasing the mileage of vehicles as much as possible is a difficult problem that the automotive industry around the world needs to overcome

[0003] Since the motor in a pure electric drive vehicle has the functions of a motor and a generator at the same time, and the power battery is also a container that can accept electric energy output and input, so the pure electric vehicle realizes energy feedback through the energy feedback function when the vehicle is running, that is, the vehicle The kinetic energy during deceleration is converted into electric energy through the motor feedback mode and finally stored in the power battery, but limited by the hardware matching and software control of traditional braking and electric braking, the vehicle's driving range and energy consumption level not getting the best boost

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