System and method for controlling uphill driving of an electric vehicle

A technology for electric vehicles and electric motors, which is applied in the control drive, electric braking system, electric vehicles, etc., and can solve the problems of motor torque limitation and reduced driving performance of electric vehicles uphill.

Inactive Publication Date: 2013-04-10
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In this case, when the SOC of the battery is 100%, the uphill driving performance of the electric vehicle is significantly reduced because the motor torque is limited due to the battery charge limit value becoming "0" as described above
So the result is that the electric car may back down the slope due to the negative value of power supplied to the motor in this case

Method used

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  • System and method for controlling uphill driving of an electric vehicle
  • System and method for controlling uphill driving of an electric vehicle
  • System and method for controlling uphill driving of an electric vehicle

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Embodiment Construction

[0026] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein includes motor vehicles in general that can be operated solely on electric power (such as including sport utility vehicles (SUVs), buses, trucks, passenger vehicles including various commercial vehicles), water vehicles including various boats and ships, aircraft, etc.

[0028] Such as figure 2 As shown, the present invention includes: a battery 100 configured to provide power to the electric vehicle 10; The vehicle control device 200 , and the motor control device 300 and the brake control device 400 configured to control the motor and the brake, respectively, by receiving control commands from the vehicle control device 200 .

[0029] The battery 100 supplies electric power to the electric vehicle 10 . The electric motor operates in a regenerat...

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Abstract

The method for controlling uphill driving of an electric vehicle which includes a motor and a battery, comprising: (a) determining, by a control unit, whether a torque of the motor is a positive value and a velocity of the motor is a negative value when the battery is in a charging power limit state; (b) controlling, by the control unit, the torque of the motor to be 0 and engaging a brake when all the conditions of the step (a) are satisfied; and (c) releasing the brake and outputting the torque of the motor when the electric vehicle is stopped by activation of the brake. Subsequently the method may return to step (a) after carrying out the step (c).

Description

technical field [0001] The present invention relates to a system and method for controlling uphill driving of an electric vehicle. More particularly, the present invention relates to a system and method capable of safely controlling an electric vehicle to stop and run when the electric vehicle starts to reverse along a slope. Background technique [0002] Unlike hybrid electric vehicles (HEV) and fuel cell electric vehicles (FCEV), electric vehicles are constructed such that power provided to the drive train of the electric vehicle comes solely from the battery. An electric motor of an electric vehicle performs a regenerative operation using driving force generated by wheels, and a battery is charged by regenerative power provided by the regenerative operation. [0003] Because there is a limit to how much power a battery can hold, a charge limit or discharge limit is placed on the battery in an EV to prevent the EV from exceeding the acceptable battery capacity. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/00B60L15/20
CPCB60L2240/423B60L15/2081Y02T10/7044B60L15/20B60L2240/18B60L2250/26B60L2240/12B60L11/1859B60L7/26Y02T10/7005B60L15/2018B60L11/1862Y02T10/705Y02T10/642B60L15/00Y02T10/72B60L58/14B60L58/13B60L58/15Y02T10/64Y02T10/70
Inventor 金尚准金成德
Owner HYUNDAI MOTOR CO LTD
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