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Fuel cell engine system and load increase and load decrease control method

An engine system, fuel cell technology, applied in the direction of fuel cells, fuel cell additives, electrochemical generators, etc., can solve the problems of shortening the service life of fuel cells, fuel cell voltage fluctuations, catalyst attenuation, etc., to reduce the voltage The effect of reducing the fluctuation of electric potential and improving the life of

Active Publication Date: 2013-12-18
SUNRISE POWER CO LTD
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Problems solved by technology

The disadvantage of the fuel cell engine system in the prior art is: during the loading and unloading process, due to the gas supply difference between the hydrogen system and the air system, the fuel cell voltage fluctuates, and the voltage fluctuation will cause platinum (Pt) in the fuel cell Dissolution, causing catalyst decay, thereby shortening the service life of the fuel cell

Method used

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  • Fuel cell engine system and load increase and load decrease control method
  • Fuel cell engine system and load increase and load decrease control method
  • Fuel cell engine system and load increase and load decrease control method

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Embodiment Construction

[0028] The present invention is further described below in conjunction with embodiment and accompanying drawing.

[0029] The fuel cell engine system includes air system, hydrogen system, cooling circulation system, stack module

[0030] (9) and electric control system; air system includes filter muffler (1), air supply mechanism (2), humidifier (3) and water separator (4); hydrogen system includes hydrogen storage tank (5), control valve (6), hydrogen exhaust valve (8) and buffer tank (7), the buffer tank (7) is installed on the pipeline between the control valve (6) and the hydrogen inlet of the stack module (9), the stack Module (9) is a 400-cell battery module, the hydrogen utilization rate in the working condition test is higher than 95%, the cathode stoichiometric ratio is 2.5, that is, S is 2.5, and the minimum loading stoichiometric ratio is 2.0, that is, S 1 is 2.0, the highest stoichiometric ratio of load reduction is 3.0, that is, S 2 It is 3, that is, the stoichi...

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Abstract

The invention relates to a fuel cell engine system and a load increase and load decrease control method. The system comprises an air system, a hydrogen system, a cooling cycle system, a galvanic pile module and an electric control system, wherein a buffer tank arranged on a pipeline between a control valve and a galvanic pile hydrogen inlet is additionally arranged in the hydrogen system; the volume of the buffer tank is greater than or equal to that of air flow required by an anode at limit loading speed. The load increase and load decrease control method of the system comprises the following steps: controlling the load increase and load decrease of a cathode by taking the air flow in the buffer tank as an upper limit during the load increase and load decrease processes of a fuel cell engine; and performing stepped load increase and load decrease control by taking a set upper limit value of load increase and load decrease speed of the cathode as the maximum load increase and load decrease speed. The system and the method which are provided by the invention have the beneficial effects that air lacking phenomenon of the anode is effectively avoided due to introduction of a hydrogen buffer tank; through the control for load increase and load decrease, the fluctuation of voltage is reduced, and the service life of the engine system can be effectively prolonged.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to the field of power output control of fuel cell engine systems. Background technique: [0002] In order to protect the environment and reduce air pollution in cities, devices powered by PEMFC (Proton Exchange Membrane Fuel Cell) have received more and more attention. When PEMFC is fueled by pure hydrogen, it can achieve true "zero" emissions. At present, PEMFC has certain applications in transportation, communication and other fields. The disadvantage of the fuel cell engine system in the prior art is: during the loading and unloading process, due to the gas supply difference between the hydrogen system and the air system, the fuel cell voltage fluctuates, and the voltage fluctuation will cause platinum (Pt) in the fuel cell Dissolution causes the catalyst to decay, thereby shortening the service life of the fuel cell. Contents of the invention [0003] The object of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/04089
CPCY02E60/50
Inventor 王仁芳侯中军胡景春戚朋江洪春沈鸿娟
Owner SUNRISE POWER CO LTD
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