Fuel cell device

Abstract

The invention discloses a fuel cell device. The fuel cell device comprises a cathode cooling plate, a cathode current zoning and gathering plate, a membrane electrode component, an anode current zoning and gathering plate and an anode cooling plate connected in sequence in a fitting mode, wherein a plurality of flow channel coverage regions are arranged on the surface of each of the cathode current zoning and gathering plate and anode current zoning and gathering plate near the membrane electrode component, each flow channel coverage region comprises a plurality of parallel gas flow channels, a conductive layer is arranged between the adjacent gas flow channels, a plurality of current collecting conductive layers are arranged on the surface of a cathode combined type flow field current collecting plate far away from the membrane electrode component, the conductive layers are electrically connected with the current collecting conductive layers in a conducting mode, each current collecting conductive layer is connected with a current collecting terminal through a lead, and the lead between each conductive layer and the corresponding current collecting terminal is connected with a current sensor in series. The fuel cell device is capable of monitoring the actual response performance distribution, response condition distribution and the like of each local region in the cell in real time, and accordingly the fuel cell research and development efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a fuel cell device. Background technique [0002] A fuel cell is an environmentally friendly, high-efficiency, long-life power generation device. Taking the proton exchange membrane fuel cell (PEMFC) as an example, the fuel gas enters from the anode side, the hydrogen atoms lose electrons at the anode and become protons, the protons pass through the proton exchange membrane to the cathode, and the electrons also reach the cathode through the external circuit, and at the cathode Protons, electrons and oxygen combine to form water. The fuel cell converts chemical energy into electrical energy in a non-combustion manner, and its direct power generation efficiency can be as high as 45% because it is not limited by the Carnot cycle. With the battery stack as the core power generation device, the fuel cell system integrates power management, thermal management and other modules, and has the ...

AI Technical Summary

Problems solved by technology

[0006] like Image 6 Shown is the front view of the bipolar plate of the fuel cell (the flow channel is not shown), and the dotted line membrane electrode reaction area is divided into different areas from R1 to R16. Taking this figure as an example for qualitative analysis, the condition of the fuel cell without humidification The relative humidity of R1 at the inlet is the lowest, and the relative humidity of R16 at the outlet is the highest, so the proton exchange membrane at R1 is the driest and the internal resistance of the battery is the largest, resulting in the lowest performance and the fastest decay in this area; Under density operating conditions, due to the increase of generated water, the relative humidity in the R16 area often exceeds 100%, resulting in the accumulation of liquid water in the flow channel, resulting in the inability of the gas to be transported to the surface of the reaction electrode, and accelerating the performance decay of the membrane electrode

[0007] The performance degradation and life attenuation of fuel cells generally first occur in some local areas (such as the above qualitative analysis, not limited to the above analysis), while most other areas maintain good performance and service life. However, these phenomena in Under the conditions of the existing fuel cell device, it cannot be quantitatively measured experimentally (the existing fuel cell can only measure the overall output voltage of the battery under a given current condition), so it is impossible to improve the reaction conditions and performance of the local area purposefully. Significantly improve the performance and life of fuel cells

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