Fuel cell control method and device

Abstract

The invention provides a fuel cell control method and device. The method comprises the following steps: obtaining the residual electric quantity of a power cell at a first moment after electric equipment is started; comparing the residual electric quantity with a first electric quantity threshold; when the residual electric quantity is greater than the first electric quantity threshold, selectinga power point smaller than the theoretical charging power as the output power of a fuel cell so as to control the fuel cell to output; and when the residual electric quantity is less than the first electric quantity threshold, selecting a power point greater than the theoretical charging power as the output power of the fuel cell so as to control the fuel cell to output. In this way, proper charging power is selected according to the interval where the residual electric quantity of the power cell is located, and the fuel cell can always work in an efficient charging-discharging area. After theelectric equipment operates for a period of time, the output power of the fuel cell and the residual electric quantity of the power cell tend to be stable, so that the output power change of the fuelcell is reduced, and the service life of the fuel cell is prolonged.

Description

technical field [0001] The present application relates to the technical field of fuel cells, in particular to a control method and device for a fuel cell. Background technique [0002] A fuel cell is a device that converts chemical energy into electrical energy with high energy conversion efficiency. At present, it has been applied to a certain extent and has a good application prospect. However, limited by its own characteristics, the output current of the fuel cell may fluctuate greatly. If the fuel cell directly provides electrical energy to electrical equipment, the electrical equipment may be damaged due to large current fluctuations. [0003] In order to solve the problem of unstable output of the fuel cell, one or more storage batteries can be added as power batteries between the fuel cell and the electrical equipment. During operation, the power battery is charged by the fuel cell, and then the power battery provides electric energy for the electrical equipment. ...

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Problems solved by technology

[0004] However, most of the current related control methods control the charging power of the fuel cell according to the remaining power of the power battery. The required power obtained by this control method changes frequently, which is likely to cause frequent start and stop of the fuel cell, and long-term use will lead to damage to the fuel cell.

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