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Driving motor torque distribution method and device, and electric vehicle

A technology for driving motors and electric vehicles, which is applied in the direction of electric vehicles, control drives, and control devices, and can solve problems such as the inability to allocate different proportions of single-motor torque, and the low overall conversion rate of power battery power and total target torque, etc., to achieve Reduce the low conversion rate, improve the conversion rate, and solve the effect of mileage

Inactive Publication Date: 2021-03-12
BYD CO LTD
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Problems solved by technology

[0004] The purpose of the present disclosure is to provide a driving motor torque distribution method and device for an electric vehicle to solve the problem that each driving motor distributes the driving torque or feedback torque according to a fixed torque distribution ratio when the electric vehicle is running under various working conditions, and cannot The single-motor torque of the driving motor is distributed in different proportions, resulting in a low overall conversion rate between the power of the power battery and the total target torque

Method used

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  • Driving motor torque distribution method and device, and electric vehicle
  • Driving motor torque distribution method and device, and electric vehicle
  • Driving motor torque distribution method and device, and electric vehicle

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Embodiment Construction

[0028] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0029] It should be noted that the terms “first” and “second” in the description and claims of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily have to be interpreted as a specific sequence or sequence.

[0030] In the related technology, by setting a double-winding motor on the electric vehicle as the driving motor, when the electric vehicle is running in each working condition, each driving motor distributes the single-motor torque according to a fixed torque ratio. When crawling at low speeds such as slope road conditions, or when driving at high speed with low torque, each drive motor does not d...

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Abstract

The invention relates to a driving motor torque distribution method and device, and an electric vehicle, and aims to solve a problem that an overall conversion rate of power of a power battery and total target torque is relatively low. The method comprises the following steps: determining the driving state of the electric vehicle and the total target torque of a driving motor of the electric vehicle, wherein the driving state is a driving state or a feedback driving state; according to the total target torque and mapping relation information corresponding to the driving state, determining thesingle-motor torque of each driving motor of the electric vehicle, wherein the mapping relation information is pre-calibrated in the driving state, and for different total target torque values, the proportions of the single-motor torques of all the driving motors in the total target torque are different; and allocating a single motor torque corresponding to each driving motor to the driving motor.The single motor torque of each driving motor can be distributed according to the working condition so that the overall conversion rate of the power of the power battery and the total target torque is effectively improved.

Description

technical field [0001] The present disclosure relates to the field of electric vehicle engineering, in particular, to a driving motor torque distribution method and device, and an electric vehicle. Background technique [0002] According to the characteristics of electric vehicles, the driving motors of electric vehicles have special performance requirements compared with industrial motors. First of all, in order to reduce the overall mass of the electric vehicle, the driving motor should not be too heavy; secondly, in order to facilitate the layout of the various systems of the vehicle, the volume of the driving motor should not be too large; thirdly, due to the complicated road conditions of electric vehicles, such as climbing road conditions , the drive motor needs to be able to provide a larger torque to ensure sufficient power for the electric vehicle. [0003] In the related art, a double-winding motor is used as the driving motor of the electric vehicle. The double-w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/423Y02T10/72
Inventor 廖朋张京华尤君韩瑶川谭先华
Owner BYD CO LTD
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