Fuel cell water management system and fuel cell water management method

Abstract

The invention relates to the technical field of fuel cells, and discloses a fuel cell water management system and a fuel cell water management method. The system comprises a humidifier, an electric pile, a water storage device, a heating device, a fuel cell controller and a first detection device for detecting the humidity of air flow at an outlet of the humidifier, wherein a first return pipeline is arranged between a return air outlet of the electric pile and a wet side inlet of the humidifier; the heating device is used for heating water stored in the water storage device, and a water vapor outlet of the water storage device is connected with a wet side inlet of the humidifier through a second backflow pipeline; the heating device and the first detection device are both in signal connection with the fuel cell controller, so that the working state of the heating device is controlled through the outlet airflow humidity of the humidifier. The humidity of the reaction gas can be reasonably controlled through the first detection device, the water storage device and the heating device so as to reduce the strict degree of parameter requirements on the humidifier, and furthermore, the membrane electrode can be prevented from being flooded through the second detection device and the condenser.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell water management system and a fuel cell water management method. Background technique [0002] The water distribution of the proton exchange membrane is very important to the performance of the fuel cell. In order to obtain high battery performance, the reaction gas entering the stack is usually humidified to ensure that the proton exchange membrane is fully wetted and the proton transfer rate is accelerated. [0003] Insufficient humidification of the reaction gas will cause dehydration of the proton exchange membrane and increase the proton conduction resistance. When the membrane is severely dry, pinholes will appear, resulting in poor battery performance or failure; if the reaction gas is excessively humidified, the liquid water in the battery will increase. , increasing the battery drainage burden. These problems undoubtedly put forward higher requirements on...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned fuel cell engine system, the degree of humidification of the dry air flow cannot be flexibly controlled, and the technical requirements for the humidifier are relatively strict

In addition, the fuel cell voltage inspection module can only be used to judge whether the battery has a tendency to flood, but it does not avoid the problem of membrane electrode flooding

Images