Fuel cell system and low-temperature quick start method

Abstract

The invention relates to the field of fuel cells, and in particular to a low-temperature quick start device for a fuel cell. The device comprises the following parts of a combustion chamber for supplying heat to the reforming chamber; a reforming chamber for converting methanol to hydrogen; a galvanic pile for converting hydrogen chemical energy into electrical energy; a solenoid valve for controlling hydrogen flow; a low-pressure hydrogen storage tank for storing hydrogen; a pressure sensor for detecting hydrogen pressure in the low-pressure hydrogen storage tank; a methanol supply module forsupplying methanol to the combustion chamber and reforming chamber; and a control module for controlling opening of the solenoid valve, reading the hydrogen pressure, adjusting the combustion chamberand supplying methanol for the reforming chamber. The low-temperature quick start device stores a part of hydrogen by adding a low-pressure hydrogen storage tank, and supplies hydrogen to the combustion chamber when the fuel cell system is started, especially at a low temperature start, so that the combustion chamber can be rapidly heated up to catalyze the methanol combustion temperature and shorten the startup time of the fuel cell.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a low-temperature quick-start device for fuel cells. Background technique [0002] In the past, most fuel cell start-up systems used electric heating to start. The start-up time was long, the heating was not uniform, and a large amount of electric energy was consumed. Especially when starting at low temperature, it was difficult to heat the fuel cell to a temperature suitable for operation. The lithium battery will be exhausted before the temperature suitable for operation. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention proposes a hydrogen storage structure that adds a solenoid valve, a low-pressure hydrogen storage tank, and a pressure sensor at the hydrogen outlet of the stack to accelerate the start of the next fuel cell and solve the low-temperature start-up problem of the fuel cell. It also provides an algorithm for calculat...

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Problems solved by technology

[0002] In the past, most fuel cell start-up systems used electric heating to start. The start-up time was long, the heating was not uniform, and a large amount of electric energy was consumed. Especially when starting at low temperature, it was difficult to heat the fuel cell to a temperature suitable for operation. Drain the lithium battery before the temperature suitable for operation

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