Fuel cell vehicle, control method and control system thereof

Abstract

The invention discloses a control system of a fuel cell vehicle. The control system includes a fuel cell engine, a DC/DC converter, a fuel cell manager for controlling the fuel cell engine and the DC/DC converter, a power battery, a battery manager for controlling the power battery, a mode selection switch, a motor and a motor controller; a vehicle controller is connected with the fuel cell manager, the battery manager and the motor controller respectively; the vehicle controller determines the working mode of the fuel cell engine according to the fault state of the fuel cell vehicle, the charge value of the power battery and the state of the mode selection switch, and controls the fuel cell manager according to the working mode. With the control system of the fuel cell vehicle of the invention adopted, vehicle energy distribution can be optimized, and the efficiency of a fuel cell system and the power battery can be improved, and the fuel cell system can be effectively protected, and a vehicle control algorithm can be simplified, and the control algorithm is reliable and effective. The invention also discloses a fuel cell vehicle and a control method of the fuel cell vehicle.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a control system of a fuel cell vehicle, a control system method of a fuel cell vehicle and a fuel cell vehicle. Background technique [0002] With the widespread promotion of electric vehicles, the short board of electric vehicles has gradually become the focus of attention. However, the current high cost and low life of batteries hinder the development of electric vehicles. Car range anxiety. Compared with other extended-range electric vehicles, fuel cell vehicles have outstanding advantages, such as high efficiency and zero emission, and are a new energy vehicle with good development prospects. The energy management and control of fuel cell hybrid power system is one of the core technologies of fuel cell system research in fuel cell vehicles. Control energy output, optimize energy distribution, reduce the dynamic load of the fuel cell engine at the same time, protect the...

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Problems solved by technology

[0005] The disadvantages of the above three schemes are: the power following control strategy does not take into account the matching characteristics of system parameters and specific driving conditions, and cannot effectively play the role of the power battery and fuel cell system, which is not conducive to the improvement of the efficiency of the vehicle system. And under the condition that the required power of the whole vehicle changes greatly, the power following control strategy will often cause damage to the fuel cell system. At the same time, complex models are used for energy distribution. Multiplication principle model, fuzzy control model is used when estimating power battery power, etc., the control system is relatively complicated, high cost, and low reliability

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