Flow field plate and fuel cell

Abstract

The invention relates to the technical field of fuel cells, and particularly discloses a flow field plate and a fuel cell. The flow field plate comprises a plate body and a plurality of turbulent flowprotrusions. The plate body comprises a material circulation face, a material inlet is formed in the first end of the material circulation face, a material outlet is formed in the second end of the material circulation face, and materials flow from the material inlet to the material outlet. Multiple turbulent flow protrusions are arranged on the material circulation face of the plate body at intervals and arranged in a staggered mode in the material flowing direction. The materials flow through the space between every two adjacent turbulent flow protrusions, the turbulent flow protrusions have a disturbance effect on flowing of the materials, and thus the materials can be evenly distributed. Continuous grooves and ridges are not formed in the material flowing direction, the materials canevenly flow in the direction parallel to the material flowing direction and the direction perpendicular to the material flowing direction, the material flowing range is enlarged, the material flowingspeed is increased, the material distribution uniformity is improved, and the heat management level of the fuel cell and the performance of the fuel cell can be improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a flow field plate and a fuel cell. Background technique [0002] In order to ensure the performance and life of the fuel cell, it is necessary to keep the performance of each point of the membrane electrode consistent, so it is necessary to maintain uniform gas distribution and temperature distribution at each point of the membrane electrode. On the one hand, if the gas distribution is inconsistent and the heat dissipation conditions of each point of the membrane electrode are inconsistent, the actual performance of each point of the membrane electrode will vary greatly, and in severe cases, the membrane electrode will be locally overheated, or even burn through the proton exchange membrane. On the other hand, the gas flow rate in the direction perpendicular to the membrane electrode is critical to the performance of high current density, and increasing the gas normal transpo...

AI Technical Summary

Problems solved by technology

The disadvantage is that continuous grooves and ridges will block the distribution of gas and liquid supply, so that the concentration of gas and liquid in the reaction area corresponding to the groove part is significantly different from the gas and liquid concentration in the reaction area corresponding to the ridge part. As a result, the gas and temperature distribution at each point of the membrane electrode is uneven; on the other hand, since all the grooves are on the same plane, the flow direction of the gas and liquid is mainly in the direction parallel to the groove, which reduces the gas and liquid flow. flow velocity, which in turn reduces the performance of the fuel cell

Images