EV Energy Recovery Torque Control for Coasting and Braking
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Solution Overview
Problem
Existing energy recovery control methods in electric vehicles fail to achieve maximum energy recovery during braking and coasting modes.
Innovation Solution
A method and apparatus that determine whether the electric vehicle is in a coasting or braking energy recovery mode, acquire the corresponding torque, and send it to the motor controller to charge the battery, combining both modes for optimal energy recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the electric vehicle uses traditional braking energy recovery control methods, then the braking energy can be converted into electrical energy and stored in the battery, but the maximum energy recovery cannot be achieved
Solution Approach 1:
The patent segments the energy recovery control into two distinct modes: coasting energy recovery mode (where the driver releases the accelerator without pressing the brake) and braking energy recovery mode (where the driver presses the brake). Each mode has its own control strategy and torque calculation method, allowing optimized energy recovery for each specific driving scenario rather than using a single generic control approach
Solution Approach 2:
The patent implements dynamic mode switching between coasting and braking energy recovery based on real-time detection of driver intent (accelerator and brake pedal states). The control system dynamically adjusts the energy recovery torque and charging power according to the current mode and vehicle conditions, enabling adaptive optimization of energy recovery efficiency
2Use of energy by moving object
If the electric vehicle converts motion energy to electrical energy during braking, then the battery can be charged and driving range improved, but the current control system fails to maximize energy recovery
Solution Approach 1:
The patent converts the previously wasted motion energy during coasting and braking into useful electrical energy for battery charging. By capturing the kinetic energy that would otherwise be dissipated as heat during deceleration and transforming it into electrical energy through the motor generator, the system turns energy loss into energy recovery, directly addressing the problem of wasted motion energy
Solution Approach 2:
The patent changes the control parameters by implementing different torque calculation methods for coasting and braking modes. In coasting mode, the system calculates coasting energy recovery torque based on vehicle deceleration rate and other parameters, while in braking mode, it calculates braking energy recovery torque differently, optimizing the energy conversion efficiency for each specific operational condition
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Maximizes energy recovery by effectively converting wasted motion energy into electricity and storing it in the battery, improving the driving range of electric vehicles.
Implementation Method 1
this wasted motion energy can be converted into electrical energy through braking energy recovery technology and stored in the battery
Data Source
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AI summary
The present application provides a method and an apparatus for controlling energy recovery, a controller, and an electric vehicle. The method includes: determining whether an electric vehicle is in a coasting energy recovery mode or a braking energy recovery mode; acquiring an energy recovery torque of the electric vehicle if the electric is in the coasting energy recovery mode or the braking energy recovery mode; and sending the energy recovery torque to a motor controller of the electric vehicle, whereby allowing the motor controller to control a motor of the electric vehicle to charge a battery of the electric vehicle. The method provided by embodiments of the present application can solve the problem that the method for controlling energy recovery in the prior art is difficult to reach a maximum energy recovery.