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Electric car slipping working condition initiative torsion-decreasing strategy

A technology for electric vehicles and working conditions, applied in electric vehicles, control drive, power management, etc., can solve problems such as power interruption

Inactive Publication Date: 2018-04-27
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an active torque reduction strategy for electric vehicles under slipping conditions, so as to solve the problem of instantaneous discharge of power batteries under slipping conditions and avoid the problem of power interruption caused by too low voltage

Method used

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  • Electric car slipping working condition initiative torsion-decreasing strategy
  • Electric car slipping working condition initiative torsion-decreasing strategy
  • Electric car slipping working condition initiative torsion-decreasing strategy

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Embodiment Construction

[0027] The technical solution of the present invention is described in detail below through the examples, and the following examples are only exemplary and can only be used to explain and illustrate the technical solution of the present invention, rather than being interpreted as a limitation to the technical solution of the present invention.

[0028] The technical solution of the present application is used to solve and avoid common skidding conditions such as rainy road, snowy road, ice road and tire suspension. According to the formula P=n*T / 9550, under slipping conditions, there will be an instantaneous high-power discharge phenomenon, which will cause the battery voltage to drop instantly. According to the analysis of a large number of experimental data on the ice surface in the northeast, nearly 80kw will be discharged within 200ms. At this time, the back electromotive force of the motor increases with the increase of speed and torque, while the battery voltage decreases...

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Abstract

The invention relates to an electric car slipping working condition initiative torsion-decreasing strategy which includes five steps. The step one, a speed difference is calculated and filtering processing is performed; the step two, estimate of a speed difference standard is performed; the step three, conditions of entering and exiting are judged; the step four, a torsion treatment strategy is initiated in slipping working condition; and step five, a torsion safety treatment strategy is initiated. In the working conditions of rainwater road surface, snowfield road surface, glaze ice road surface, tire suspending in midair and the like which can cause tire slipping, when the average speed difference value exceeds the preset speed difference value, the executing torsion uses the strategy offar below the request torsion, and the problem that momentary discharge can cause overcurrent of a motor to lead to power failure can be solved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle control, and in particular refers to an active torque reduction strategy for electric vehicle slipping conditions. Background technique [0002] At present, electric vehicles have gradually been favored by consumers, and their share in the automobile market is indispensable. The three core components of electric vehicles, motors, electronic controls, and batteries, have matured and entered the stage of technology intensive cultivation. There are many types of electric vehicles on the market, all of which are developing in the direction of long cruising range and good acceleration performance. [0003] Under certain working conditions of electric vehicles, such as slippery conditions, such as rainy roads, snowy roads, icy roads, and tires suspended in the air. According to the formula P=n*T / 9550, under slipping conditions, there will be a phenomenon of instantaneous high-power discharge,...

Claims

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Application Information

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IPC IPC(8): B60L15/28
CPCB60L15/28B60L2240/423Y02T10/72
Inventor 艾敬尧张彦辉窦翠晓
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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