A fuel cell cooling flow field plate based on parallel gradient branch structure design

Abstract

The application relates to the technical field of fuel cells, and provides a fuel cell cooling flow field plate based on a parallel gradient branch structure design. The fuel cell cooling flow field plate comprises a cooling flow field plate, an upstream distribution main flow channel, a downstream collection main flow channel, gradient branches and a plurality of ridges; the upstream distribution main flow channel and the downstream collection main flow channel are arranged in parallel on a geometric central axis of the cooling flow field plate; a plurality of groups of the gradient branches are connected between the upstream distribution main flow channel and the downstream collection main flow channel to form a parallel flow channel network; the plurality of ridges are arranged at intervals between adjacent gradient branches and are used for separating flow channels; and the lengths of the plurality of groups of the gradient branches are differentially configured according to spatial distribution of membrane electrode thermal load, so that different gradient branches form different flow resistances matched with the spatial distribution of the thermal load, and the gradient branches corresponding to high thermal load regions have short lengths and low flow resistances. The application can realize spatial adaptive matching of cooling liquid flow and non-uniform thermal load of a membrane electrode, and can greatly reduce pressure drop while maintaining high temperature distribution uniformity.

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