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CAN bus-based electric vehicle power supply control method

A technology of CAN bus and electric vehicles, applied in the field of electric vehicle power supply control based on CAN bus, can solve the problems of low flexibility and scalability, high cost of high-power DC-DC modules, low reliability, etc., to improve The Effects of Flexibility and Ease of Scalability

Active Publication Date: 2015-07-08
汇川新能源汽车技术(深圳)有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a CAN bus-based electric vehicle power supply control method for the defects of high-power DC-DC modules in the above trolleybus, such as high cost, low reliability, low flexibility and scalability

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  • CAN bus-based electric vehicle power supply control method

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] The CAN bus-based electric vehicle power supply control method of the present invention is used to realize the control of a high-power DC-DC digital parallel control system, and the high-power DC-DC digital parallel control system includes a micro control unit and a plurality of electronic control units. Specifically, the above-mentioned micro control unit and each electronic control unit exchange information through a CAN bus with a baud rate of 500Kbps. The number N of electronic control units is determined by the formula N=P / E, where P is the total power of the high-power DC-DC digital...

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Abstract

The invention relates to a CAN bus-based electric vehicle power supply control method. A high-power DC-DC digital parallel control system comprises a micro control unit and electronic control units. The method comprises the following steps that the micro control unit sets one electronic control unit which is qualified as a host to be the host and the rest electronic control units which are qualified as slaves to be the slaves; the micro control unit monitors the working state of the host and the slaves, and performs processing regulation in real time; the host generates reference current Ir according to target voltage Vr from the micro control unit and system feedback voltage Vf and sends the reference current Ir to each slave, and the host and the slaves regulate PWM output according to the reference current Ir and corresponding feedback current so as to realize constant voltage output or constant current output. A digital parallel connection strategy for multiple modules is realized through a CAN bus, thus the defects of complexity and susceptibility to influence of multiple module connection achieved by hardware in the prior art are overcome, and the flexibility and expansibility of the system are improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, and more specifically, relates to a CAN bus-based power supply control method for electric vehicles. Background technique [0002] The development of internal combustion engine vehicles, especially automobiles, is one of the most significant achievements of modern industrial technology. Automobiles have made a significant contribution to the development of modern society in meeting people's daily mobility needs. However, the application of a large number of automobiles in the world has produced and is continuing to cause serious environmental and human survival problems. In the past ten years, in the field of research and development related to transportation, people have devoted themselves to the development of efficient, clean and safe means of transportation. Electric vehicles, hybrid vehicles, and fuel cell vehicles have been typically proposed as transportation means to replace c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L9/04
Inventor 晋孝龙王茜茜
Owner 汇川新能源汽车技术(深圳)有限公司
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