New energy braking energy recovery control system and method

A technology of braking energy recovery and energy recovery, which is applied in the direction of electric braking system, control drive, control device, etc., can solve the problem that the braking performance cannot meet the demand, and achieve the effect of improving driving comfort and driving experience

Pending Publication Date: 2020-04-21
FAW JIEFANG AUTOMOTIVE CO
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Therefore constant braking p

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  • New energy braking energy recovery control system and method
  • New energy braking energy recovery control system and method
  • New energy braking energy recovery control system and method

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[0042] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. Vehicle energy recovery mode judgment: Determine whether to enter the coasting energy recovery or braking energy recovery mode according to the accelerator pedal depth, brake pedal depth, current vehicle speed and other conditions.

[0043] Entry conditions for coasting energy recovery mode: When the vehicle speed is greater than a certain set value, the accelerator pedal and brake pedal depth are zero.

[0044] Entry conditions for braking energy mode: vehicle speed is greater than a certain set value, accelerator pedal depth is zero, and brake pedal depth is greater than a certain value.

[0045] The SOC value of the power battery sent by the battery management system to the vehicle controller is received through the CAN message. When the SOC is greater than the set threshold, the energy recovery mode is prohibited, motor braking is pr...

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Abstract

The invention discloses a new energy braking energy recovery control system and a method, belongs to the technical field of automobiles, and aims at solving the problem that according to an existing common braking energy recovery control method, the braking performance of a whole vehicle is fixed after leaving a factory. The new energy braking energy recovery control method comprises following steps: firstly, whether energy recovery can be performed is judged according to power battery SOC; judging an energy recovery mode according to vehicle speed, accelerator pedal and brake pedal depth is carried out; a braking energy recovery torque limit value is firstly calculated by a whole vehicle controler, the motor braking intervention proportion set by a driver is obtained, an initial value ofbraking torque is obtained by looking up a table, final braking torque is obtained after the numerical values are integrated, a motor controller is used for controlling a motor to achieve the brakingtorque, and a current output torque is fed back to the whole vehicle controller in real time.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a new energy braking energy recovery control method. Background technique [0002] There are generally two methods of braking for pure electric vehicles, mechanical braking and motor braking. Mechanical braking converts the kinetic energy of the vehicle into the heat of the braking system and dissipates it. Frequent use will cause the thermal decline of the braking system, causing the Decreased mobility. The method of motor braking is to make the driving motor in the power generation state during braking, and the kinetic energy of the vehicle is converted into electric energy and stored in the battery. Using this method of braking energy recovery can improve the energy utilization rate and the cruising range of the vehicle. [0003] In the current common braking energy recovery control method, when the vehicle brakes, the vehicle controller calculates the braking torque accord...

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Application Information

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IPC IPC(8): B60L7/10B60L7/22B60L15/20B60R16/023
CPCB60L7/10B60L7/22B60L15/2009B60R16/0231B60L2240/423B60L2240/54B60L2240/10B60L2240/12Y02T10/72
Inventor 王超庞学文杨帅蔡文文马艳
Owner FAW JIEFANG AUTOMOTIVE CO
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