Pressure compensation device of hydrogen fuel cell

Abstract

The invention relates to the field of fuel cells, especially relates to a pressure compensation device of a hydrogen fuel cell, and specifically provides equipment for providing an auxiliary homogenous pressure for the hydrogen fuel cell used in the field of new energy automobiles. The equipment comprises a shell, a pressure compensation cavity and a pressure regulation cavity communicating with each other are arranged in the shell, liquid submerges the communication site of the pressure compensation cavity and the pressure regulation cavity, so that the gas parts of the pressure compensation cavity and the pressure regulation cavity are isolated, and the liquid parts are communicated; the pressure compensation cavity is used for communicating with the fuel cell, and the pressure regulation cavity is used for communicating with the exterior of the shell; and in use, the pressure compensation cavity and the pressure regulation cavity have a liquid level difference, and air is stored in the pressure compensation cavity, and in the case of under-pressure of an air supply source of the fuel cell, the pressure compensation cavity supplements air into the fuel cell under the action of the liquid level difference. In the structure, in the case of pressure fluctuation of the air supply source, the air pressure can be conveniently judged through the change of the pressure difference by means of the mobility of liquid, and in addition, the air in the pressure compensation cavity can be supplemented into the fuel cell in real time so as to guarantee the balance of the air pressure inside the fuel cell.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a hydrogen fuel cell pressure compensation device, in particular to provide auxiliary pressure equalization equipment for fuel cells used in the field of new energy vehicles. Background technique [0002] Fuel cells are widely used, not only in military, space, power plant fields, but also in motor vehicles, mobile devices, households and other fields. Early fuel cell development focused on professional applications such as military space and distributed power generation above the kilowatt level. The field of electric vehicles has become the main direction of fuel cell applications, and a variety of automatic vehicles that use fuel cells to generate electricity have appeared in the market. In addition, the use of fuel cells in general consumer electronic products through miniaturization technology is also one of the application development directions. With the advancement of technology...

AI Technical Summary

Problems solved by technology

Since the hydrogen and oxygen in the fuel cell must be fully humidified and maintained at pressure, if the pressure or humidity is not enough, it will easily cause fuel waste and indiscriminate combustion, which will affect the use and output power of the battery

[0003] When the existing hydrogen fuel cell is used, it is often necessary to adjust the air pressure, temperature, and humidity entering the fuel cell to ensure that the gas can be used. If the pressure is unstable during use, the amount of hydrogen or supply will be insufficient, and the Affect the use of equipment, and then affect the instability of fuel cell voltage output

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