Intestine-like flow field plate and fuel cell including the same

Abstract

The invention discloses an intestine-like flow field plate and a fuel cell including the same. According to the traditional flow field plate, product bubbles are not easy to flow and exhaust because of straight channels and corners. According to the disclosed intestine-like flow field plate, an intestine-like flow channel slot is formed in the inner side and is formed by an inlet slot, an outlet slot, m single intestine-like slots, and (m-1) connecting slots. The contour of the cross section of each single intestine-like slot is formed by n first semicircles and n second semicircles; the circle centers of the n first semicircles and the n second semicircles are located at the same straight feature line; the n first semicircles are connected successively in an end-to-end manner and midpoints of the n first semicircles are located at one side of the straight feature line; the n second semicircles are connected successively in an end-to-end manner and the midpoints of the n second semicircles s are located at the other side of the straight feature line; and any two adjacent single intestine-like slots are communicated by one connecting slot. According to the invention, the intestine-like flow channel is designed by referring to the intestinal canal structure of food flowing in the body, so that the number of times of turning in flowing of a methanol solution is increased.

Description

technical field [0001] The invention belongs to the technical field of direct alcohol fuel cells, and in particular relates to a sausage-shaped flow field plate and a fuel cell including the flow field plate. Background technique [0002] A fuel cell is a power generating device that converts chemical energy directly into electricity. In recent years, due to its advantages of high efficiency, cleanliness, quietness and simple start-up conditions, it has been paid more and more attention by researchers from all over the world. [0003] A fuel cell generally consists of two flow field plates (anode and cathode) sandwiching a membrane electrode. Among them, the flow field plate is an important part of the fuel cell, which mainly plays the role of fuel flow, collecting electrons and supporting the battery structure. Therefore, the flow field structure has an important impact on the performance of the fuel cell. [0004] There are many types of flow field structures, such as pa...

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Problems solved by technology

[0004] There are many types of flow field structures, such as parallel flow field, helical flow field, and interdigitated flow field, etc. The straight channels and corners in the traditional flow field plate are not conducive to the flow and discharge of product bubbles, resulting in fuel in the flow field. The channel is blocked by air bubbles that are not discharged in time, so the actual flow rate of fuel is much lower than the peak value

At the same time, the single channel in the existing flow field plate is straight and long, and the pressure drops at the corner, resulting in low fuel material transfer efficiency, and the fuel concentration difference between the head and tail of the single channel is large, resulting in a concentration gradient in each channel. large, resulting in uneven electrochemical reactions and affecting the overall performance of the fuel cell

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