Fuel battery power supply device and power supply system

Abstract

The invention discloses a fuel battery power supply device and a power supply system. The fuel battery power supply device comprises a fuel battery, an inverter, a first conversion unit, a second conversion unit, a third conversion unit, a charge and discharge energy storage unit, a first output end, a second output end and a first control unit, wherein the input end of the first conversion unit is connected with the fuel battery, and the output end of the first conversion unit is connected with the inverter; the input end of the second conversion unit is connected with the fuel battery; the input end of the third conversion unit is connected with the output end of the second conversion unit, and the output end of the third conversion unit is connected with the inverter; the charge and discharge energy storage unit is connected to a first node; the first output end is arranged at the first node; the second output end is arranged at the output end of the inverter; and the first control unit is used for controlling the output voltages of the first conversion unit and the third conversion unit by adopting a closed-loop control mode according to the input voltage of the inverter. By utilizing the fuel battery power supply device and the power supply system, the problem of considering the conversion efficiency and the power generation efficiency of the fuel battery simultaneously in the prior art is solved, and the effect of improving the conversion efficiency and the power generation efficiency of the fuel battery simultaneously is further achieved.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell power supply device and a power supply system. Background technique [0002] A fuel cell is an environmentally friendly, high-efficiency, long-life power generation device. Taking Proton Exchange Membrane Fuel Cell (PEMFC for short) as an example, fuel gas enters from the anode side, hydrogen atoms lose electrons at the anode and become protons, protons pass through the proton exchange membrane to the cathode, and electrons pass through the external circuit at the same time It also reaches the cathode, where protons, electrons and oxygen combine to form water. The fuel cell converts chemical energy into electrical energy in a non-combustion manner, and its direct power generation efficiency can be as high as 45% because it is not limited by the Carnot cycle. With the battery stack as the core power generation device, the fuel cell system integrates power management, therma...

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a fuel cell power supply device and power supply system to solve the problem in the prior art that the conversion efficiency and power generation efficiency of the fuel cell cannot be taken into account at the same time

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