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Method and device for controlling power of electric drive system

An electric drive system and power control technology, applied in motor vehicles, transportation and packaging, hybrid vehicles, etc., can solve the problems of excessive use of power batteries, affecting the service life of power batteries, and difficulty in effectively ensuring the charging and discharging of power batteries, etc. to avoid overuse

Active Publication Date: 2016-06-15
SAIC MOTOR
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AI Technical Summary

Problems solved by technology

[0005] The invention solves the problem that it is difficult to effectively ensure that the power battery is charged and discharged within a reasonable power range, which will cause the power battery to be overused, thereby affecting the service life of the power battery

Method used

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  • Method and device for controlling power of electric drive system
  • Method and device for controlling power of electric drive system

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Embodiment Construction

[0051] In the prior art, it is difficult to ensure that the charging power and discharging power of the power battery are within the effective limit range under various operating conditions, and there is a problem that the power battery is overused.

[0052] In order to solve the above problems, the technical solution of the present invention provides a power control method for an electric drive system. Such as figure 1 As shown, step S1 is executed to obtain the power compensation value of the electric drive system when the discharge power of the power battery satisfies the first restriction condition or the charging power satisfies the second restriction condition.

[0053] The first limiting condition is associated with the discharge power and the discharging threshold of the power battery, and the second limiting condition is associated with the charging power and charging threshold of the power battery.

[0054] The discharge threshold includes a first limit value and a ...

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Abstract

The invention provides a method and device for controlling power of an electric drive system. The method includes the steps that a power compensation value of the electric drive system is obtained when the discharge power of a power battery meets a first limiting condition or the charge power of the power battery meets a second limiting condition; the first limiting condition associates with the discharge power and a discharge threshold of the power battery, and the second limiting condition associates with the charge power and a charge threshold of the power battery; and the drive power or the generation power of the electric drive system is determined according to the power compensation value. According to the method, during the discharge and charge process of the power battery, the drive power and the generation power of the electric drive system are controlled in real time according to the power compensation value, so that the actual discharge and charge power of the power battery is made to be within a reasonable power range, and the power battery is prevented from being overused; the service life of the power battery can be effectively prolonged, and vehicle performance is improved.

Description

technical field [0001] The invention relates to the field of electric drive system control of automobiles, in particular to a power control method and device for the electric drive system. Background technique [0002] With the rapid development of today's automobile industry, electric vehicles have become an important means of urban ground transportation due to their great advantages in energy saving and environmental protection. An electric drive vehicle refers to a vehicle that uses electric energy as the driving energy, and uses the on-board power supply to provide power to the motor to drive the rotation of the wheels of the vehicle. Electric drive vehicles include pure electric drive system vehicles and hybrid system vehicles. The pure electric system refers to the driving force of the vehicle from the motor, and the hybrid system refers to the gasoline-electric hybrid system, that is, the combination of fuel drive and electric drive. The hybrid vehicle is composed of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/26B60W10/08B60W20/00
Inventor 朱军马成杰张鹏君孙俊
Owner SAIC MOTOR
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