Fuel cell system, control method, vehicle-mounted power supply system and vehicle

A technology of a fuel cell system and a fuel cell stack, which is applied in the fields of vehicle power supply systems, vehicles, control methods, and fuel cell systems, and can solve problems such as fuel cell system life attenuation and performance degradation, so as to reduce the rate of performance attenuation and improve life , the effect of optimizing the configuration

Pending Publication Date: 2019-08-09
ZHENGZHOU YUTONG BUS CO LTD
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Problems solved by technology

[0004] The object of the present invention is to provide a fuel cell system, a control method, an on-board power supply system and a vehicle, which are used to solve the problem of the fuel

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  • Fuel cell system, control method, vehicle-mounted power supply system and vehicle

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[0031] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0032] The present invention provides a vehicle. The vehicle includes a vehicle-mounted power supply system and a load. The vehicle-mounted power supply system includes a fuel cell system, a DC / DC converter, and a power battery. Here, the fuel cell system includes a hydrogen storage device, an air supply device, and at least two fuel cell stacks connected in parallel. Each fuel cell stack includes a hydrogen gas inlet, an air inlet, a hydrogen gas outlet, and an air outlet. The hydrogen device is connected to each fuel cell stack through the corresponding hydrogen gas inlet and air inlet. The output end of each fuel cell stack is used to connect to the low voltage end of the DC / DC converter through the corresponding control switch. The high voltage end of the / DC converter is connected to the power battery, and the high voltage end of the DC / DC...

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Abstract

The invention provides a fuel cell system, a control method, a vehicle-mounted power supply system and a vehicle. Multiple fuel cell stacks are integrated in the fuel cell system. All the fuel cell stacks are connected in parallel. The output end of each fuel cell stack is connected with the low voltage end of a DC/DC converter through a corresponding control switch. The high voltage end of the DC/DC converter is connected with a power cell load. When the fuel cell system is in the idling condition and the state of charge of the power cell is high, the controller controls the corresponding fuel cell stack to shut down and cut off the current output according to the power demand of the load so that the fuel cell stack in the working state can generate electricity with the power higher thanthe electrochemical polarization curve. The fuel cell stacks can be effectively prevented from working in the electrochemical polarization region under the idling condition of the fuel cell system sothat the service life of the fuel cell is improved and the performance attenuation rate of the fuel cell system is reduced.

Description

technical field [0001] The invention belongs to the technical field of fuel cell systems, and in particular relates to a fuel cell system, a control method, a vehicle power supply system and a vehicle. Background technique [0002] Under the dual pressure of energy and environment, fuel cell vehicles have become the direction of the future development of the automobile industry and the focus of research in the field of automobiles. A fuel cell vehicle is a vehicle powered by electricity generated by an on-board fuel cell device. The fuel used by the vehicle-mounted fuel cell device is high-purity hydrogen or hydrogen-containing reformed gas obtained by reforming hydrogen-containing fuel. Compared with ordinary electric vehicles, the difference in power is that the power used by fuel cell vehicles comes from on-board fuel cell devices, and the power used by electric vehicles comes from batteries charged by the grid. A fuel cell is a high-efficiency power generation device t...

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Application Information

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IPC IPC(8): H01M8/04298H01M8/24H01M8/2404
CPCH01M8/24H01M8/2404H01M8/04298B60L50/50Y02E60/50
Inventor 张龙海李维国王鑫曹卓涛周鑫杨春博
Owner ZHENGZHOU YUTONG BUS CO LTD
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