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Electric vehicle pre-charging control method and system

A technology for electric vehicles and control methods, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve problems such as low pre-charging efficiency of electric vehicles, and achieve the effect of improving pre-charging efficiency, avoiding waste, and improving driving experience.

Inactive Publication Date: 2019-06-18
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the electric vehicle pre-charging efficiency in the prior art is low, thus a kind of electric vehicle pre-charging control method and system are proposed to solve this problem

Method used

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  • Electric vehicle pre-charging control method and system
  • Electric vehicle pre-charging control method and system

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Embodiment 1

[0062] figure 1 Shown is a kind of electric vehicle precharging control method of embodiment 1 of the present invention, and this method comprises the following steps:

[0063] S1. Predicting the predicted temperature value of the pre-charging resistor after the pre-charging is completed. Before the pre-charging starts, predicting the predicted temperature value of the pre-charging resistor in the pre-charging circuit of the electric vehicle after the pre-charging is completed may specifically include the following steps:

[0064] Firstly, the difference between the voltage of the battery system of the electric vehicle and the voltage of the load circuit is calculated. For example, assuming that the voltage of the battery system of the electric vehicle is V1, and the voltage of the load circuit of the electric vehicle is V2, then the difference V0 is V0=|V1-V2|.

[0065] Secondly, the predicted temperature increase value of the pre-charging resistor after the pre-charging is...

Embodiment 2

[0108] image 3 A pre-charging control system for an electric vehicle according to Embodiment 2 of the present invention is shown, and the system includes: a first prediction module 21 , a first judging module 22 , a prohibition module 23 and a pre-charging start module 24 .

[0109] Wherein, the first prediction module 21 is used to predict the predicted temperature value of the pre-charging resistor in the pre-charging circuit of the electric vehicle after the pre-charging is completed before the pre-charging starts. Specifically, the first prediction module includes: a difference calculation unit, used to calculate the difference between the voltage of the battery system of the electric vehicle and the voltage of the load circuit; Value obtains the expected temperature increase value of the pre-charging resistance after the pre-charging is completed; the predicted temperature value calculation unit is used to calculate the pre-charging value after the pre-charging is comple...

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Abstract

The invention provides a pre-charging control method and system of electromobile. The method comprises the following steps that before pre-charging, a predicted temperature value of a pre-charging resistor after completion of pre-charging is predicted, and whether the predicted temperature value exceeds a temperature threshold is determined; when the predicted temperature value exceeds the temperature threshold of the pre-charging resistor, pre-charging is forbidden; and when the predicted temperature value does not the preset temperature threshold, pre-charging is started. In the charging process, whether a present pre-charging voltage value accords with a predetermined pre-charging voltage curve is monitored in real time, and when the present pre-charging voltage value does not accord with the predetermined pre-charging voltage curve, pre-charging is stopped. According to the method, heat prediction is carried out on the pre-charging resistor to determine whether pre-charging can be implemented, and the pre-charging voltage is monitored to predict whether pre-charging can succeed, so that measures can be taken in advance. The method can be used to avoid waste caused by useless pre-charging time, improve the pre-charging efficiency, ensure that pre-charging is completed successfully within shortest time, shorten the high-voltage connection time, and improve the driving experience.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric vehicle pre-charging control method and system. Background technique [0002] With the deepening of the global energy crisis, the depletion of oil resources and the increasing harm of air pollution and global temperature rise, energy saving and emission reduction are the main directions of future automotive technology development. Japan's Toyota Corporation took the lead in developing the Prius hybrid car, which opened the prelude to the era of electric vehicles. As a new generation of transportation, electric vehicles have incomparable advantages over traditional vehicles in terms of energy saving, emission reduction and reducing human dependence on traditional fossil energy. Since 2009, the Chinese government has intensively introduced policies and measures to encourage the development of electric vehicles and related industries, and enterprises have significantly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 闫丽娟赵祥日
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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