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Method capable of adjusting recovery proportion of braking force of electric vehicle

A braking force recovery, electric vehicle technology, applied in electric vehicles, electric braking systems, vehicle components, etc., to achieve the effect of increasing cruising range, improving recovery, and enhancing safety

Active Publication Date: 2012-07-18
北京长城华冠汽车技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the traditional electric vehicle control system does not have such a function

Method used

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  • Method capable of adjusting recovery proportion of braking force of electric vehicle
  • Method capable of adjusting recovery proportion of braking force of electric vehicle
  • Method capable of adjusting recovery proportion of braking force of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment is a device for adjusting the braking force recovery ratio of an electric vehicle, such as figure 1 shown. This embodiment includes: a ratio adjustment unit with a ratio adjustment button, the ratio adjustment unit is connected to the control and calculation unit, the control and calculation unit is connected to the CAN bus and the vehicle controller in turn, and the control and the calculation unit is connected with the display unit; the vehicle controller is connected with the acquisition unit, and the acquisition unit includes: a battery parameter acquisition module for collecting power battery power, power battery voltage, and power battery temperature, collecting power generation current, power generation Generator parameter acquisition module for efficiency, and vehicle condition acquisition module for vehicle speed, transmission ratio, and pedal position.

[0025] In this embodiment, a control device is installed on a common electric vehicle to a...

Embodiment 2

[0035] This embodiment is an improvement of the first embodiment, and is a refinement of the device shown in the first embodiment with regard to the ratio adjustment unit. The ratio adjustment unit described in this embodiment includes: a switching value acquisition module, and the ratio adjustment button is one of physical buttons or simulated buttons on the screen.

[0036] In this embodiment, a switching quantity acquisition module is added on the basis of the original electric vehicle combination instrument, and the parameter acquisition is performed for pressing the proportional adjustment button to determine the selected braking force recovery ratio.

Embodiment 3

[0038] This embodiment is an improvement of the above embodiment, and is a refinement of the voltage acquisition circuit of the above embodiment, such as figure 2 shown. The voltage acquisition circuit of the battery parameter acquisition module described in this embodiment includes: a 68.1K resistor (R21) connected to the positive terminal (VBAT1) of the power battery, the 68.1K resistor, a 30K resistor (R22) and a 10K resistor (R51 ), the 30K resistor is connected to the ground (GND), the 10K resistor is connected to the 33nF capacitor (CB11), the 33nF capacitor is connected to the ground (GND), the 10K resistor is connected to the 33nF capacitor The connecting node is the low voltage monitoring point (LOWBATT).

[0039]In order to ensure the normal start and stop of the vehicle instrument and CAN communication, and also ensure the safety of the circuit, a voltage acquisition circuit is specially designed in this embodiment. The voltage collection described in this embodi...

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Abstract

The invention relates to a method capable of adjusting a recovery proportion of the braking force of an electric vehicle. A device used in the method comprises a proportion adjustment unit provided with proportion adjustment keys, wherein the proportion adjustment unit is connected with a control and calculation unit, the control and calculation unit is connected with a CAN (Controller Area Network) bus and a vehicle controller in sequence, the vehicle controller is connected with a collection unit, the collection unit comprises a battery parameter collection module, an electric generator parameter collection module and a vehicle condition collection module, wherein the battery parameter collection module is used for collecting the electricity quantity, the voltage and the temperature of a power battery, the electric generator parameter collection module is used for collecting the electricity generating current and the electricity generating efficiency, and the vehicle condition collection module is used for collecting the speed, the transmission ratio and the pedal position of the vehicle. According to the method, the recovery proportion of the braking energy of the electric vehicle can be adjusted by adjusting the proportion adjustment keys, so that the requirements on different driving habits and different road conditions of drivers can be met, the braking safety is enhanced, the recovery of the braking energy is improved effectively, the continuously-running mileage of the vehicle is increased, and the service life of the power battery is prolonged.

Description

technical field [0001] The invention relates to a method for adjusting the braking force recovery ratio of an electric vehicle, which is an electronic control device and method for the vehicle, and a control device and method for the electric vehicle. Background technique [0002] During the operation of electric vehicles, especially in urban areas, acceleration, deceleration, and braking are repeated frequently. In this state of motion, the kinetic energy of the vehicle is converted into heat and waste, and a large amount of energy must be consumed when it is restarted. Recycling the energy consumed in vain during the operation of electric vehicles in a certain way will effectively improve the cruising range of electric vehicles. At present, regenerative braking energy feedback technology is generally realized. The electric motor can be used as a generator to regenerate the kinetic energy of the vehicle into electrical energy during braking. This braking regeneration can s...

Claims

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Application Information

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IPC IPC(8): B60L7/18
Inventor 解哲刘天鸣王鲁蛟
Owner 北京长城华冠汽车技术开发有限公司