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Fuel cell car energy control method based on CAN bus network communication

A CAN bus and fuel cell technology, applied in the field of vehicle energy management, can solve the problems of accurate charging and discharging of battery power, impact on battery life, overcharging and overdischarging of batteries, etc., to improve overall efficiency and controllable charging and discharging states Effect

Inactive Publication Date: 2006-07-26
TSINGHUA UNIV
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Problems solved by technology

But this method also contains a lot of defects: in the dynamic response, only controlling the bus voltage can not accurately control the energy distribution of each component; due to the lack of real-time and accurate estimation of the internal pressure, internal resistance and SOC of the battery, only the bus voltage is used as a quantity It is impossible to accurately charge and discharge the power of the battery, and the battery will often be overcharged and overdischarged in actual operation, which will affect the service life of the battery

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  • Fuel cell car energy control method based on CAN bus network communication
  • Fuel cell car energy control method based on CAN bus network communication
  • Fuel cell car energy control method based on CAN bus network communication

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Embodiment Construction

[0048] The specific implementation of the present invention will be further described below in conjunction with accompanying drawing:

[0049] figure 1 It is a schematic diagram of the structure of the fuel cell power system. The double thick solid line in the figure represents the energy flow circuit, while the single dotted line represents the state and control signal flow circuit based on the CAN bus network transmission. Fuel cells use hydrogen from hydrogen cylinders as their energy source. A motor controller is a DC / AC converter that converts DC power into AC power to drive a motor. The fuel cell system is connected in parallel with the battery and motor controller through the main DC / DC converter. In this way, by controlling the main DC / DC current output, the current output and power output of the fuel cell can be controlled, and the input and output current of the motor and the battery can be realized. Automatic control of input and output current with clear targets....

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Abstract

The invention relates the fuel battery coach controlling method on base of the CAN bus internet communication used for hybrid power system, using the direct converting means to carry out energy management control. The CAN bus sends the main voltage signal VDC / DC, motor rotation rate signal rmotor and throttle pedal signal Acc_ps to full control device; in full control device looking up goal torque Tmotor and calculate demand total power Pmotor, auxiliary device power PAUX and accumulator charge-discharge power Pbat; calculate DC / DC output current IDC / DC; IDC / DC passes first order filtration, after meeting the DC / DC converter dynamic regulator course, then the full control device sends it to DC / DC control device by CAN bus, and realize the DC / DC current control. The invention can realize the accurately control of load power, and provide the flat form for any kind of energy controlling method; the charge and discharge state provided by secondary energy can be controlled; the integral efficiency of power system is improved.

Description

technical field [0001] An energy control method for a fuel cell bus based on CAN bus network communication is applicable to a control method for a hybrid power system using a DC conversion device for real-time energy management, and belongs to the technical field of vehicle energy management methods. technical background [0002] With the increasing demand for energy shortage and environmental protection in the world, people need efficient, clean, economical, safe and sustainable energy as a substitute for petroleum products to provide driving energy for automobiles, and hydrogen and oxygen can pass through the internal environment of fuel cells. The electrochemical reaction produces water and releases electricity, an ideal energy source that is extremely clean and efficient. [0003] At present, the most widely used in automobiles is the proton exchange membrane hydrogen fuel cell. The common practice is that the exchange membrane hydrogen fuel cell is directly connected to...

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Application Information

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IPC IPC(8): B60L11/18B60L15/00H02J7/34
CPCY02T10/7216Y02T10/92Y02T10/645Y02T90/16Y02T10/64Y02T10/70Y02T10/72
Inventor 苏浩秦欧阳明高卢兰光
Owner TSINGHUA UNIV
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