Motor system efficiency correction method and device for electric vehicle
A technology for electric vehicles and system efficiency, applied in electric vehicles, control devices, power management, etc., can solve the problem of low precision and achieve the effect of improving the accuracy of correction
Active Publication Date: 2021-11-26
GREAT WALL MOTOR CO LTD
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Problems solved by technology
[0005] In view of this, the present invention aims to propose a motor system efficiency correction method for electric vehicles to at least solve the problem of low accuracy caused by correction based on solidified motor acceleration in the current related art
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[0033] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.
[0034] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.
[0035] Pure electric vehicles usually use appropriate algorithms and reserved interfaces to realize the distribution of power requests among high-voltage components on the vehicle, formulate corresponding strategies and algorithms to control the power limit of the air conditioner and the power limit of the motor, and ensure the smooth and safe operation of the vehicle Under this condition, the effect of protecting the battery pack, saving energy and increasing the driving range can be achieved. Therefore, the correction for the efficiency of the motor system is very important.
[0036] Such as figure 1 As shown, the motor system efficiency correction method of an electric vehicle...
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The present invention relates to the technical field of electric vehicle motors, and provides a motor system efficiency correction method and device for electric vehicles, wherein the method includes: determining the maximum available power of the motor system during the working process of the motor of the electric vehicle; according to the maximum available power Determine the corresponding target motor speed when power compensation is required according to the changes in the working process of the motor; query the motor system efficiency bench table according to the target motor speed to determine the corresponding target initial motor correction coefficient, where the The motor system efficiency bench table stores multiple sets of motor speeds and initial motor correction coefficients corresponding to each other; and corrects the determined target initial motor correction coefficients. Therefore, by finding out the correction timing of the coefficient, the corrected motor correction coefficient is more suitable for the actual vehicle driving conditions, and the correction accuracy of the motor system efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of electric vehicle motors, in particular to a method and device for correcting the efficiency of a motor system of an electric vehicle. Background technique [0002] The power of an electric vehicle is converted from the electrical energy of the battery into mechanical energy, which involves the issue of conversion efficiency, which needs to be considered in the process of driving and recycling. If the efficiency of the motor system is set too high, the battery will be over-discharged during driving and overcharged during recycling, which will affect the battery life; if the efficiency of the motor system is set too low, the performance of the system will not be fully utilized. Therefore, in order to optimize the use efficiency of electric vehicle batteries, while ensuring the performance of the whole vehicle and prolonging the battery life, electric vehicles usually control the efficiency of converting the...
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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/421Y02T10/72
Inventor 孙成军刘伟王舵胡文生刘喜明彭立龙张健邢小帅
Owner GREAT WALL MOTOR CO LTD