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A dual-motor dual-energy hybrid drive system

A drive system, dual-energy technology, applied in electric braking systems, electric vehicles, control drives, etc., can solve the problems of reduced reliability of the whole vehicle drive system, increased cost of the drive motor, and larger motor volume, and can overcome the problem of The effect of dynamic feedback energy absorption is low, charging and discharging power is high, and efficiency is high.

Inactive Publication Date: 2011-12-28
SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vehicles using a single drive motor not only need a gearbox to meet the power requirements, but also for the drive motor of a heavy-duty commercial vehicle, the size of the motor will become larger and the control will be more complicated due to the demand for torque and speed, and the cost of the drive motor will increase dramatically. , the reliability of the vehicle drive system will decrease

Method used

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  • A dual-motor dual-energy hybrid drive system
  • A dual-motor dual-energy hybrid drive system

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Embodiment Construction

[0011] Embodiments of the invention will be further described with reference to the accompanying drawings.

[0012] The composite drive system architecture proposed by the present invention adopts dual drive motors and power battery-super capacitor dual energy sources, including (7) power battery pack, (5) super capacitor pack, (6) DC / DC converter, (9) main drive motor, (8) main drive motor controller, (3) auxiliary drive motor, (4) auxiliary drive motor controller, (2) auxiliary drive shaft, (10) main drive shaft, (1) double input coupled drive axle, and Control units not listed in the drawings, such as vehicle controller, supercapacitor management system, and power battery management system. The connection relationship is as follows: (6) the input end of the DC / DC converter is connected with (7) the power battery pack, and the output end is connected with (5) the supercapacitor pack. When the supercapacitor management system detects (5) that the power stored in the supercap...

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Abstract

The invention provides a dual-motor dual-energy composite drive system, which includes a power battery pack, a super capacitor pack, a DC / DC converter, a main drive motor, a main drive motor controller, an auxiliary drive motor, an auxiliary drive motor controller, Auxiliary drive shaft, main drive shaft and double input coupling drive axle. The supercapacitor bank is responsible for supplying power to the auxiliary drive motor, which provides auxiliary drive torque for the vehicle to start, accelerate, and uphill, and provides motor braking torque for braking feedback. The electric energy fed back by auxiliary motor braking is completely absorbed by the supercapacitor. The power battery pack is responsible for supplying power to the main drive motor and other electric accessories of the vehicle. When the power stored in the supercapacitor pack is lower than a certain limit, the power battery pack will perform compensatory constant power charging through the DC / DC converter. The output torques of the main drive motor and the auxiliary drive motor are coupled through a double-input drive axle to meet the vehicle's hill start and acceleration performance.

Description

technical field [0001] The patent of the present invention relates to an electric vehicle drive system. Background technique [0002] Because electric vehicles have the characteristics of no pollution, low noise, and energy saving, the electric vehicle industry has begun to develop rapidly. At present, domestic pure electric drive technology basically adopts two forms: single power supply (power battery / supercapacitor) and single drive motor or composite power supply (power battery-supercapacitor) and single drive motor. In the former, the power battery is the only energy source of the vehicle. Due to the frequent acceleration of the vehicle under urban working conditions, the power battery pack is frequently discharged with a large current, which reduces the energy efficiency and service life of the battery pack. At the same time, when the vehicle adopts braking feedback, due to the limitation of the charging current and voltage of the power battery, the energy conversion ...

Claims

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Application Information

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IPC IPC(8): B60L15/00B60L15/20B60L11/18B60L7/10
CPCY02T10/7005Y02T10/7216Y02T10/7022Y02T10/70Y02T10/72
Inventor 张兆龙
Owner SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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