Distributed air-cooled fuel cell system and spacecraft

Abstract

The invention discloses a distributed air-cooled fuel cell system and a spacecraft. The system comprises a hydrogen storage module, a fuel cell module, an electric control module and a first temperature sensor, wherein the first temperature sensor is used for monitoring the environment temperature of the system; the hydrogen storage module is used for supplying low-pressure hydrogen to the fuel cell module; the fuel cell module comprises at least three air-cooled hydrogen fuel cells which are connected in a series-parallel mode, and each cell comprises a second temperature sensor and a rotating speed and rotating direction adjustable fan; and the electric control module comprises a controller located in the center of the system, and the controller is used for adjusting the rotating direction of each fan according to the environment temperature and conducting closed-loop control over the rotating speed of the fan according to the running temperature and the generated power of each battery. According to the system, multi-target closed-loop rotating speed control is conducted on the fan by combining the environmental characteristics of the inner battery and the thermal management requirement of the system, the fan is controlled to rotate according to the environmental temperature, and the overall power generation output efficiency of the system is improved.

Description

technical field [0001] The present application relates to the technical field of proton exchange membrane fuel cells, in particular to a distributed air-cooled fuel cell system and spacecraft. Background technique [0002] At present, air-cooled hydrogen fuel cell systems are increasingly widely used in aerospace and other fields due to their advantages of high-quality power density, zero pollution and long battery life. In spacecraft such as UAVs, since the layout of the air-cooled fuel cell power system must match the cabin of the spacecraft, it is often restricted by the space layout and gas flow characteristics. The thermal management system of the air-cooled fuel cell monitors the ambient temperature and the stack temperature, and controls the heat dissipation of the air-cooled fuel cell in combination with factors such as solid-state hydrogen storage heat dissipation and power regulation. [0003] In related technologies, the thermal management system of air-cooled fu...

AI Technical Summary

Problems solved by technology

The system combines the installation environment characteristics of the internal fuel cell sub-modules and the thermal management requirements of the battery itself, and performs multi-objective closed-loop speed control on the fan to achieve high-efficiency output of the fuel cell system as a whole. The monitoring and control of fan steering realizes the comprehensive management of the overall temperature of the power system, which solves the problem that the power generation efficiency of each subunit is too large due to environmental differences in the actual operation of the distributed air-cooled fuel cell power system, which affects the overall stable output of the system.

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