A liquid inlet control method for methanol water buffer tank of ht-pem methanol water fuel cell

Abstract

The invention discloses a method for controlling the liquid intake of the methanol water buffer tank of a HT‑PEM methanol water fuel cell. The method S1 of the present invention is to obtain the liquid intake of the buffer tank once at each interval Δt under the working state of the buffer tank liquid intake Working state parameters, calculate the real-time liquid level height value H of the buffer tank according to the obtained working state parameters; The bit height value is compared, and the working status of the solenoid valve and the buffer tank inlet pump is regulated according to the comparison result. The invention improves the safety of the liquid entering the buffer tank, improves the stability of the fuel supply of the fuel cell, can send the abnormal information of the liquid entering to the user in time, and reduces the risk of the system shutting down due to the fuel supply problem.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a liquid inlet control method for a methanol-water buffer tank of a HT-PEM methanol-water fuel cell. Background technique [0002] In the methanol-water fuel cell system based on HT-PEM, the methanol water is stored in a special container. For safety reasons, it is generally placed away from the fuel cell body, but the problem is that the fuel cell needs to Real-time and precise control of the amount of methanol water inflow, and there can be no delay or pause in the liquid inflow. Therefore, it is generally necessary to design a special methanol water buffer inflow tank in the fuel cell body to buffer the methanol water solution. Due to the volume of the inflow tank and cost constraints, we cannot install a complex liquid level measuring device for the buffer tank. In addition, in order to ensure that the remaining liquid level in the buffer tank always meets the working requ...

AI Technical Summary

Problems solved by technology

[0004] 1. The detection accuracy of the liquid level of the buffer tank is poor, and the error is large; every time the power is turned on, regardless of the liquid level of the buffer tank, the operation of methanol water filling will be carried out, which will cause methanol water leakage;

[0005] 2. The replenishment of methanol water inlet depends too much on the low liquid level sensor on the buffer tank, which will cause the delay of methanol water inlet replenishment and the interruption of fuel cell power generation process

Images