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Combined braking system and method and electric vehicle

A technology of combined braking and electric vehicles, applied in electric braking systems, electric vehicles, brake transmissions, etc., can solve problems such as the inability to provide braking torque, and achieve the effect of preventing wheel locking and maintaining driving stability.

Inactive Publication Date: 2021-03-02
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For vehicles driven by in-wheel motors, the regenerative braking of the motor can realize energy recovery and improve the energy utilization rate, but when the motor performs regenerative braking at low torque, regenerative braking cannot provide stable braking torque

Method used

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  • Combined braking system and method and electric vehicle
  • Combined braking system and method and electric vehicle
  • Combined braking system and method and electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0094] figure 1 A schematic structural diagram of a combined braking system provided by an embodiment of the present invention, the combined braking system includes:

[0095] Brake pedal 1, driver control box 2, brake controller 3, hydraulic brake system 4, battery management system 5, power battery 6, central controller 7, state acquisition device 8, in-wheel motor 10 controller 9 and four a hub motor 10;

[0096] The central controller 7 is connected with the battery management system 5, the power distribution controller of the vehicle, the brake controller 3, the DC-DC controller, the driver control box 2 and the state acquisition device 8 through the CAN bus, and is also connected through the CAN bus. The Flexray bus is connected to the engine controller of the vehicle, the generator controller of the vehicle, and the hub motor 10 controller 9;

[0097] The central controller 7 performs calculations according to the signal of the brake pedal 1 and the vehicle state collect...

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Abstract

The invention relates to a combined braking system and method and an electric vehicle. The combined braking system comprises a brake pedal, a driver control box, a brake controller, a hydraulic brakesystem, a battery management system, a power battery, a central controller, a state acquisition device, a hub motor controller and four hub motors. The central controller carries out operation according to signals of the brake pedal and vehicle states collected by a state collecting device to obtain the torque of electric braking and hydraulic braking, then electric braking signals are sent to thehub motor controller, the sensor transmits monitoring data back to the hub motor control unit in real time, the hub motor control unit calculates motor control voltage and frequency in real time andapplies the motor control voltage and frequency to an inverter, so that each hub motor operates at a given negative acceleration speed and torque, and electric braking is realized; and the hydraulic braking signal is sent to a braking controller, the braking controller controls a hydraulic braking system to achieve hydraulic braking, and the two act together to complete the braking function of thevehicle.

Description

technical field [0001] The invention relates to the technical field related to electric vehicles, in particular to a combined braking system, method and electric vehicle. Background technique [0002] With the development and maturity of electric vehicle technology, vehicle electric braking technology is also developing continuously, becoming a hot spot in current vehicle technology research. [0003] Electro-hydraulic combined braking is a key technology for in-wheel motor-driven vehicles, which can improve braking safety while recovering braking energy and improving fuel economy of the vehicle. For vehicles driven by in-wheel motors, the regenerative braking of the motor can realize energy recovery and improve the energy utilization rate. However, when the motor performs regenerative braking at low torque, regenerative braking cannot provide stable braking torque. How to combine electric braking and mechanical braking to ensure the braking safety of the vehicle on the one...

Claims

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Application Information

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IPC IPC(8): B60L7/00B60L15/20B60T13/74
CPCB60L7/00B60L15/2009B60L2220/44B60L2240/42B60T13/74B60T13/745Y02T10/72
Inventor 廖自力马晓军蔡立春刘春光袁东张运银魏曙光朱宁龙杨恒程疏歆王科淯张凌云徐浩轩
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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