A kind of pure electric vehicle torque function safety monitoring method, system and vehicle

A functionally safe, pure electric vehicle technology, applied in the direction of electric vehicles, power management, vehicle components, etc., can solve problems such as vehicle power interruption, achieve the effect of avoiding power interruption and improving driving safety

Active Publication Date: 2022-04-01
深蓝汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing motor torque safety control strategy, by comparing the torque values ​​obtained by torque control and torque monitoring calculations, if the difference is within the preset safety threshold, it is judged that the motor torque control is in a safe state; otherwise, the torque control state is not When it is safe, the output signal of the torque monitoring module shuts down the IGBT power module circuit in an emergency, so that the motor controller enters the safe state mode, but this way of directly cutting off the power will bring unnecessary power to the vehicle when the torque fault of the motor system is not serious to interrupt

Method used

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  • A kind of pure electric vehicle torque function safety monitoring method, system and vehicle
  • A kind of pure electric vehicle torque function safety monitoring method, system and vehicle
  • A kind of pure electric vehicle torque function safety monitoring method, system and vehicle

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Embodiment Construction

[0047] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0048] see figure 1 As shown, this embodiment discloses a pure electric vehicle torque function safety monitoring method, including the following steps:

[0049] (S1) Obtain the vehicle demand torque, motor DC side parameters and motor AC side parameters; establish the AC side torque estimation model and obtain the AC side motor estimated torque according to the AC side torque estimation model, establish the DC side torque estimation model and Obtain the estimated torque of the DC side motor according to the DC side torque estimation model, establish a voltage torque estimation model and obtain the estimated torque of the motor according to the voltage torque estimation model; combine the estimated torque of the AC side motor, the estimated torque of the DC side motor and the motor After the estimated torque is filtered by the respective to...

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Abstract

The invention discloses a torque function safety monitoring method of a pure electric vehicle. Based on torque fault diagnosis, different countermeasures are adopted for faults causing different levels of motor torque safety, so as to achieve vehicle driving safety and avoid unnecessary power interruption. . Also disclosed is a pure electric vehicle torque function safety monitoring system and the vehicle. Through the method and system, the driving safety of pure electric vehicles with automatic driving (level L3 and above) is improved.

Description

technical field [0001] The invention relates to the technical field of torque safety of electric vehicles, in particular to a method, system and vehicle for monitoring the torque function safety of pure electric vehicles. Background technique [0002] In recent years, with the continuous increase in the demand for intelligent vehicles, for L3 and above vehicles with automatic driving functions, preventing unexpected acceleration / deceleration of the power system is crucial to the safety of vehicle driving. As the key components of pure electric vehicles, the drive motor and motor controller are the only source of power for the vehicle, and the accuracy of its output torque directly affects the driving safety of the vehicle. The ISO26262 international standard specifically for road functional safety was officially promulgated and implemented in November 2011, which regulates the safety life cycle of automotive electronic and electrical functions. At present, the functional sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00B60L15/20
CPCB60L3/0061B60L15/20B60L2240/423Y02T10/72
Inventor 彭志远刘立陈曦陈健杜长虹周安健马永泉邓承浩
Owner 深蓝汽车科技有限公司
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