DC/DC conversion system of electric vehicle and control method thereof

A technology for electric vehicles and conversion systems, applied in vehicle components, circuits or fluid pipelines, transportation and packaging, etc., can solve problems such as life impact, battery status transmission, and insufficient battery status detection, and achieve the effect of extending service life.

Active Publication Date: 2011-02-09
奇瑞新能源汽车股份有限公司
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  • Abstract
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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 sim

Method used

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  • DC/DC conversion system of electric vehicle and control method thereof
  • DC/DC conversion system of electric vehicle and control method thereof

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Embodiment 1

[0018] Such as figure 1 Shown: the DC / DC conversion system of the electric vehicle of this embodiment includes a DC / DC conversion module 1 for high and low voltage conversion. The DC / DC conversion module 1 is connected to the vehicle controller 3 through the control module 2, and the control module 2 It includes a battery state detection unit 21 that detects the state of high and low voltage batteries, a data acquisition unit 22 that detects the state of the DC / DC conversion module, a logic control unit 23 that controls the operation of the DC / DC conversion module, and a control unit for communication with the vehicle controller 3. The CAN bus interface unit 24 and the DC / DC conversion module 1 convert the high voltage of the high voltage battery 4 into a low voltage suitable for the low voltage battery 6. The high voltage battery 4 is connected to the high voltage load 5, and the low voltage battery 6 is connected to the low voltage load 7.

[0019] The above-mentioned control m...

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Abstract

The invention provides a safe, reliable and effective DC/DC conversion system of an electric vehicle and a control method thereof. 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 control systems, and particularly relates to a DC / DC conversion system of an electric automobile and a control method thereof. Background technique [0002] With the development of the automotive industry, clean energy vehicles such as hybrid electric vehicles, plug-in vehicles, and pure electric vehicles have received increasing attention and have become the direction of automobile development. The core components of the above-mentioned clean energy vehicles mainly include: batteries and their management systems, motors and their management systems, vehicle control systems, and high and low voltage conversion systems. [0003] The high and low voltage conversion system, that is, the DC / DC conversion system as one of the main components of clean energy vehicles, currently mainly receives vehicle instructions through the wiring harness, performs operations, and feeds back faults. The DC / DC conver...

Claims

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Application Information

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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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