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Control method of DC/DC conversion system of electric vehicle

A technology for converting systems and control methods, applied to vehicle components, circuits or fluid pipelines, transportation and packaging, etc., to achieve the effect of prolonging the service life

Active Publication Date: 2012-02-15
奇瑞新能源汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The high and low voltage conversion system, that is, the DC / DC conversion system is one of the main components of clean energy vehicles. At present, it mainly receives vehicle instructions through the wiring harness, performs operations, and feedbacks faults , mainly based on the state of the high-voltage battery, so that the DC / DC converter is always in the working state. The advantage is that the control operation is simple, and the disadvantage is that the detection of the battery state is not enough, so that the charging method has a great impact on the life of the battery. The DC / DC converter has always been work will affect its life, and at the same time, it will not be able to transmit the battery status to the vehicle controller in time, causing the vehicle controller to misjudge the battery and causing hidden dangers to the vehicle safety

Method used

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  • Control method of DC/DC conversion system of electric vehicle
  • Control method of DC/DC conversion system of electric vehicle

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The control module 2 detects the status of the high and low voltage batteries, and sends the status information of the high and low voltage batteries to the vehicle controller 3; the control module 2 detects the status of the DC / DC conversion module, and sends the status information of the DC / DC conversion module to the vehicle controller 3. The vehicle controller 3; the vehicle controller 3 collects the load status information of the vehicle, and sets the DC / DC conversion module according to the vehicle load information, the received high and low voltage battery status information and the status information of the DC / DC conversion module 1, and control the operation of the DC / DC conversion module 1 through the logic control unit 23 in the control module 2.

[0021] Specifically:

[0022] The battery state detection unit 21 of the control module detects the voltage, current, and temperature information of the high-voltage battery 4 and the voltage, current, and temperat...

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PUM

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Abstract

The invention provides a control method of a safe, reliable and effective DC / DC conversion system of an electric vehicle. The DC / DC conversion system comprises a DC / DC conversion module for carrying out high and low voltage conversion; the DC / DC conversion module is connected with a vehicle controller through a control module; and a battery state detecting unit for detecting the states of high and low voltage batteries, a data acquisition unit for detecting the state of the DC / DC conversion module and a logical control unit for controlling the work of the DC / DC conversion module are arranged in the control module. Because the battery state detecting unit, the data acquisition unit and the logical control unit are arranged in the DC / DC conversion system, whether the system needs to be charged or not and the state information of the DC / DC conversion module can be fed back to the vehicle controller according to the battery state, thus the real-time charge control of batteries is realized, the DC / DC conversion module does not need to work continuously, and the service life of the DC / DC conversion system is prolonged.

Description

technical field [0001] The invention belongs to the technical field of automobile power supply control systems, and in particular relates to a control method for a DC / DC conversion system of an electric automobile. Background technique [0002] With the development of the automobile industry, people pay more and more attention to clean energy vehicles such as hybrid vehicles, plug-in vehicles, and pure electric vehicles, and have become the direction of automobile development. The core components of the above-mentioned clean energy vehicles mainly include: battery and its management system, motor and its management system, vehicle control system, and high and low voltage conversion system. [0003] The high-voltage and low-voltage conversion system, that is, the DC / DC conversion system is one of the main components of clean energy vehicles. At present, it mainly receives vehicle instructions through the wiring harness, executes operations, and feedbacks faults. Working sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R16/033
Inventor 顾伟林伟义王野吴瑞王钦邵平魏昌田
Owner 奇瑞新能源汽车股份有限公司
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