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New energy vehicle power-off control method and device

A new energy vehicle, electric control technology, applied in the direction of control devices, battery/fuel cell control devices, electrical devices, etc., can solve the problems of vehicle flameout, driver and passengers in danger, and vehicle loss of power source, etc. To achieve the effect of improving reliability

Active Publication Date: 2021-10-29
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a malfunction caused by some non-faulty reasons triggers the power-off strategy of the power battery failure, it will directly cause the vehicle to lose its power source and cause the vehicle to stall. If this happens in the normal driving of the new energy vehicle will put the driver and passengers in danger

Method used

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  • New energy vehicle power-off control method and device
  • New energy vehicle power-off control method and device

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Embodiment Construction

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art belong to the protection scope of the embodiments of the present invention.

[0058] see figure 1 , figure 1 An embodiment of the present invention provides a new energy vehicle power-off control method, specifically including steps 11 to 13.

[0059] Step 11, judging whether the voltage difference between the input voltage of the step-down DCDC converter and the monitoring voltage of the power battery is greater than a set voltage threshold.

[0060] In practical applications, the step-down DCDC converter can measure the input volt...

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Abstract

The invention relates to the technical field of new energy automobile control, in particular to a new energy vehicle power-off control method and device. The method comprises the following steps: judging whether a voltage difference value between an input voltage of a step-down DCDC converter and a monitoring voltage of a power battery is greater than a set voltage threshold value; if the voltage difference value is greater than the set voltage threshold value, judging whether the duration of the voltage difference value greater than the set voltage threshold value is greater than a set duration; and if the duration is longer than the set duration, performing power-off control operation on the power battery. According to the method, the whole vehicle power-off caused by short-time fluctuation of the voltage difference between the input voltage of the step-down DCDC converter and the monitoring voltage of the power battery due to accidental vibration can be avoided, so that the power-off control reliability of the new energy vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle control, in particular to a new energy vehicle power-off control method and device. Background technique [0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as their power source. At present, electric vehicles with power batteries as the power source represent new energy vehicles, which have become the main development direction of new energy vehicles in the future due to their good driving performance and green environmental protection characteristics of no pollution and zero emissions. [0003] During the driving of new energy vehicles, it is necessary to reduce the DC high voltage (such as 300V to 500V) output by the power battery to an appropriate voltage range through a step-down DCDC converter to provide power for the entire vehicle. Due to the high energy density of the power battery, when the power battery fails, if the power battery is not powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L58/10
CPCB60L3/0046B60L58/10B60L2240/547B60L2240/54Y02T10/70
Inventor 李蓓刘转民李丹林
Owner DONGFENG MOTOR GRP
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