Mixed energy driving system of vehicle with fuel batteries

Abstract

An energy mixed power system for the car with fuel accumulator set features that the output of electric stack is connected via anode of power diode to the input of monodirectional DC / DC converter, whose output is connected to the output of accumulator set and input of motor controller, and the inputs of auxiliary device of fuel accumulator set and 24V DC / DC converter are connected via a switch to the cathode of power diode and via another switch to the output of monodirectional DC / DC converter. The system is started by accumulator set and then is powered by fuel accumulator system.

Description

technical field [0001] The invention relates to an energy hybrid power system of a fuel cell vehicle, belonging to the technical field of fuel cell vehicle research and development. Background technique [0002] Since the 1990s, the global oil crisis and air pollution have brought more and more attention to the energy-saving and environmental protection performance of automobiles. Although the application of engine electronic control technology and three-way catalysis and other exhaust purification technologies has reduced the emission and fuel consumption of automobiles. Already very low, but failed to fundamentally solve the vehicle pollution and energy problems. Fuel cell vehicles are widely considered to be the development trend of the future automobile industry due to their excellent performances such as quietness, high efficiency and zero emission. In the face of the sharp contradiction between energy and environmental issues and the development of the automobile indu...

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Problems solved by technology

[0002] Since the 1990s, the global oil crisis and air pollution have brought more and more attention to the energy-saving and environmental protection performance of automobiles. Although the application of engine electronic control technology and three-way catalysis and other exhaust purification technologies has reduced the emission and fuel consumption of automobiles. Already very low, but failed to fundamentally solve vehicle pollution and energy problems

During the start-up process of the power system, the electric energy provided by the battery pack (or supercapacitor) to fuel cell auxiliary equipment, 24V batteries and various control components or management components through the bidirectional DC / DC converter produces a certain loss in the bidirectional DC / DC converter , will reduce the working efficiency of the whole power system

At the same time, the bidirectional DC / DC converter technology is more difficult and the cost is higher

[0007] At present, automobile manufacturers and research institutes at home and abroad tend to use large-capacity fuel cell systems in hybrid power systems of fuel cell vehicles, supplemented by small-capacity battery packs. The consequence of doing so is that the cost of fuel cell systems Too high and the cost of the whole power system and even the whole vehicle is higher

At the same time, when the fuel cell system fails, the small-capacity battery pack is not enough to drive the whole vehicle for a long time, which reduces the reliability of the fuel cell vehicle.

In addition, the manufacturing process and production technology requirements of large-capacity fuel cell systems are relatively high, which also limits the development of fuel cell vehicles to a certain extent.

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