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Electric automobile electricity-electricity hybrid dual-winding driving system and control method

A technology for electric vehicles and drive systems, applied in electric vehicles, electric traction, vehicle energy storage, etc., can solve problems such as energy conversion efficiency, power loss, and reduced vehicle mileage, and achieve extended service life and high efficiency. , to avoid the effect of high current charge and discharge

Inactive Publication Date: 2018-01-09
江西中汽瑞华新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing dual-electric hybrid mode electric vehicles generally use a single-winding drive system with a DC / DC bi-directional coupler. The energy conversion efficiency of the DC / DC bi-directional coupler causes some electric energy to be lost in vain, resulting in continuous driving of the vehicle. mileage reduction

Method used

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  • Electric automobile electricity-electricity hybrid dual-winding driving system and control method

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Embodiment 1

[0024] like figure 1 The electric-electric hybrid double-winding driving system of an electric vehicle shown includes a power battery, a super capacitor, and a driving motor. The driving motor is a double-winding motor. The drive system also includes an inverter, which is connected to the double-winding motor and used to control the operation of the double-winding motor. Both the power battery and the super capacitor are connected to the inverter, and the inverter is also connected to a controller. The accelerator signal from the pedal and the brake from the brake pedal are used to control the charging and discharging of the power battery and supercapacitor through the inverter.

Embodiment 2

[0026] like figure 1 The electric-electric hybrid double-winding driving system of an electric vehicle shown includes a power battery, a super capacitor, and a driving motor. The driving motor is a double-winding motor. The drive system also includes a power battery inverter and a supercapacitor inverter. The power battery inverter is connected to the power battery and a set of windings of the double-winding motor respectively. The supercapacitor inverter is connected to the supercapacitor and the other set of windings of the double-winding motor A set of windings are connected, and the power battery inverter and the supercapacitor inverter are connected through a controller. The controller is used to respectively receive the accelerator signal from the accelerator pedal and the brake from the brake pedal, and respectively invert the power battery. Inverter and supercapacitor inverter are controlled.

[0027] The present invention also provides a driving control method for el...

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Abstract

The invention discloses an electric automobile electricity-electricity hybrid dual-winding driving system and a control method. A power battery and a supercapacitor are used for supplying power to a dual-winding motor, and when an automobile is accelerated during starting, the power battery and the supercapacitor are controlled to supply power to the dual-winding motor for operation acceleration;when the automobile is accelerated during normal running, the power battery is controlled to supply power to the dual-winding motor for operation acceleration; during uniform-speed running of the automobile, the power battery is controlled to supply power to the dual-winding motor to maintain the automobile speed; and during braking of the automobile, a winding of the dual-winding motor is used for converting kinetic energy of the automobile into electric energy which is stored in the supercapacitor in priority, and after the supercapacitor is fully charged, the other winding of the dual-winding motor is used for converting kinetic energy of the automobile into electric energy which is stored in the power battery. DC / DC coupling loss is avoided, efficiency is high, power for starting acceleration of the automobile is guaranteed, large-current charging and discharging of the power battery are avoided, and the service life of the power battery is prolonged.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and in particular relates to an electric-electric hybrid double-winding driving system and a control method of the electric vehicle. Background technique [0002] With the development of electric vehicles, the life of power batteries has become a major problem restricting the development of electric vehicles. High-current charging and discharging have a greater impact on the life of power batteries. Supercapacitors have the characteristics of high-current charging and discharging. Using power batteries plus supercapacitors The dual-battery hybrid mode can make up for the lack of high-current charging and discharging of the power battery and prolong the service life of the power battery. [0003] However, the existing dual-electric hybrid mode electric vehicles generally use a single-winding drive system with a DC / DC bi-directional coupler. The energy conversion efficiency of the DC / DC bi-directio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/00B60L11/18
CPCY02T10/70Y02T10/72
Inventor 王黎明孙全胜武小欢李腾陈南虎朱帅石岛
Owner 江西中汽瑞华新能源科技有限公司
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