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Temperature control method and device for electric vehicle drive motor and electric vehicle

A temperature control method and technology of a temperature control device, which are applied in electric vehicles, electrical devices, control drives, etc., can solve problems affecting the driver's driving experience, prevent further temperature rise, reduce restrictions, and ensure driving experience Effect

Active Publication Date: 2019-10-18
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a temperature control method and device for an electric vehicle drive motor and an electric vehicle, so as to solve the problem in the prior art that the driving experience of the driver is affected when controlling the temperature of the drive motor

Method used

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  • Temperature control method and device for electric vehicle drive motor and electric vehicle
  • Temperature control method and device for electric vehicle drive motor and electric vehicle
  • Temperature control method and device for electric vehicle drive motor and electric vehicle

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Embodiment Construction

[0064] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0065] Such as figure 1 As shown, it is a flow chart of a temperature control method for an electric vehicle drive motor according to an embodiment of the present invention. Before specifying the implementation process of the method, it should first be explained that the method for controlling the temperature of the drive motor of an electric vehicle provided by the present invention is suitable for such figure 2 The control system architecture shown for pure electric vehicles.

[0066] here, as figure 2 As shown, the control system architecture includes: accelerator pedal system, brake pedal system, gear system, vehicle control unit (Vehicle Control Unit, referred to as VCU), battery management system (Battery Management System, referred to as BMS),...

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Abstract

The invention provides a temperature control method and device of an electric car drive motor and an electric car. The method comprises following steps: monitoring the temperature of a drive motor ofan electric car after power on; when the temperature of the drive motor is greater than a first preset temperature threshold value and less than or equal to a second preset temperature threshold value, determining the limit torque of the drive motor according to the current performance parameters of a cooling system of the electric car and the current temperature of the drive motor; the first preset temperature threshold value is the maximum temperature at which the drive motor can operate normally over the rated power range; the second preset temperature threshold value is the critical temperature value at which the drive system of the electric car is at risk of failure; the cooling system performance parameters represent the cooling effectiveness of an electric car cooling system under maximum cooling capability conditions. The invention can effectively prevent the temperature of the drive motor from further rising, and at the same time can minimize the restriction on the torque output of the drive motor, thus ensuring the driving feeling of the driver.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method and device for controlling the temperature of a drive motor of an electric vehicle and the electric vehicle. Background technique [0002] In the face of increasingly severe energy and environmental problems, energy-saving and new energy vehicles are becoming the hotspots of current research. As a type of energy-saving and new energy vehicles, pure electric vehicles have many advantages such as no exhaust emissions, high energy efficiency, low noise, and recyclable energy during driving. Therefore, vigorously developing pure electric vehicles is beneficial to energy security and environmental protection has great significance. [0003] Pure electric vehicles drive the wheels through motors to drive the vehicle. During the driving process, the drive system will generate a lot of heat. In order to ensure the normal operation of the drive system, it is necessary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20B60L3/00
CPCY02T10/72
Inventor 李玮代康伟梁海强刘超范江楠
Owner BEIJING ELECTRIC VEHICLE
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