Fuel cell power supply management system and method

Abstract

The invention relates to a fuel cell power supply management system and method. The fuel cell power supply management system comprises an MCU connected with a plurality of groups of power supply management modules, wherein each group of power supply management modules comprises a DC-DC and a channel selector; the DC-DC is connected with the corresponding fuel cell through the channel selector to compensate the current of the fuel cell; and the MCU acquires the voltage value of the single fuel cell through a voltage measurement module, compares the voltage value of the single fuel cell with a preset threshold voltage, and controls the channel selector corresponding to the DC-DC if the voltage value of the single fuel cell is lower than the preset threshold voltage and there is a non-used DC-DC, connects the DC-DC to the two ends of the cell so as to charge the cell, and sends out alarming if the voltage value of the single fuel cell is lower than the preset threshold voltage and there is non non-used DC-DC, or any DC-DC exceeds the self rated current. The current compensation is carried out on the single fuel cell with relatively poor performance, so that the working voltage of thefuel cell is consistent with that of other series-connected fuel cells, and the purposes of prolonging the service life of the fuel cell, and slowing down the reduction of the output power and reduction of the energy utilization rate are achieved.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell power management system and method. Background technique [0002] The fuel cell stack is composed of multiple single cells connected in series and / or in parallel. In the past, the fuel cell management method was relatively simple. Voltage measurement modules, diodes, and MOS tubes were often used to monitor the fuel cell voltage. The fuel cell is suppressed, or the fuel cell is short-circuited by controlling the conduction of the MOS tube through the control chip. [0003] The above battery management methods have very limited management capabilities for fuel cells. As the fuel cell performance decays, such fuel cell power management modules will lead to accelerated decay of fuel cell performance, and a rapid decline in output power and energy utilization. [0004] In the past, by turning off the fuel cell management scheme with weak performance, not only the fuel cell coul...

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Problems solved by technology

[0003] The above battery management methods have very limited management capabilities for fuel cells. As fuel cell performance decays, such fuel cell power management modules will lead to accelerated decay of fuel cell performance, and rapid decline in output power and energy utilization.

[0004] In the past, by shutting down the fuel cell management scheme with weak performance, not only the fuel cell could not perform the function of generating electricity, but also a large amount of energy was lost due to the internal resistance of the control device itself

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