Hot standby operation control method of fuel cell system, fuel cell system, storage medium and electronic device

Abstract

The invention provides a hot standby operation control method for a fuel cell system, a fuel cell system, a storage medium, and an electronic device. The method comprises the following steps: calculating an output current value of a galvanic pile in the fuel cell system, reducing the output current value of the galvanic pile in the fuel cell system, cutting off an external output path of the system after the galvanic pile and a built-in lithium battery of the system are connected in parallel, and obtaining an initial operation strategy of the fuel cell system; based on the initial operation strategy of the fuel cell system, entering a first stage of hot standby, and communicating a galvanic pile with a built-in lithium battery of the fuel cell system, so that the galvanic pile charges the lithium battery with small current; and when the built-in lithium battery of the fuel cell system reaches a fully charged state, stopping executing the hot standby first stage, entering a hot standby second stage, and obtaining a final operation strategy of the fuel cell system. According to the technical scheme, the problems that in the prior art, the secondary starting time of a system is long, and the service life of the system is shortened due to frequent starting and stopping are solved.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, in particular, to a thermal standby operation control method of a fuel cell system, a fuel cell system, a storage medium and an electronic device. Background technique [0002] The working process of the fuel cell system includes a start-up stage, a rated output stage and a shutdown stage. The system start-up stage includes system electric heating, combustion chamber light-off, reforming heating and stack heating heating. The system startup phase requires a lot of time and power. When the battery system needs to temporarily stop the external output, if the system can be run in hot standby mode, it will save a lot of fuel, power and restart time. At the same time, the hot standby operation can achieve fast The secondary start and can prolong the life and reliability of the battery system. [0003] The hot standby control strategy of the existing fuel cell system is that when the syste...

AI Technical Summary

Problems solved by technology

When the system turns from rated output to shutdown, the frequent start and stop of auxiliary components such as pumps and valves in the system will reduce the service life of auxiliary electronic components. Frequent shutdown of the fuel cell system will seriously affect the core module stack of the system. The hydrogen-air interface will be formed on both sides of the stack MEA, which will seriously affect the service life of the stack

At the same time, due to the large temperature difference during the frequent start and stop of the stack, usually from about 25 degrees Celsius at room temperature to about 160 degrees Celsius at the normal operating temperature of the fuel cell stack, drastic changes in temperature will also affect the service life of the fuel cell stack sealing material

[0004] Most of the system products currently on the market, especially the high-temperature methanol fuel cell system, basically do not have a thermal standby function. As a result, when the external load of the system returns to zero for a short time, the system can only enter the shutdown program to reduce the internal temperature of the system to room temperature. When the external rated output of the system needs to be restarted, the system needs to be heated and started again. This process not only consumes a lot of electric energy, but also the system cannot quickly start to enter the rated working state.

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