The invention relates to a
proton exchange membrane fuel
cell unit and a
cell stack, belonging to the technical field of
hydrogen fuel cells. The battery unit is composed of
hydrogen distributor, negative
electrode flow field plate, membrane module MEA, positive
electrode flow field plate and
oxygen distributor. The
hydrogen inlet and outlet are connected with the hydrogen inlet and outlet of negative
electrode flow field plate respectively. The
oxygen inlet and outlet are connected with the
oxygen inlet and outlet of positive electrode flow field plate respectively. As that battery unit of the invention has independent hydrogen and
oxygen supply port, the bipolar plate in the prior art is canceled, and the heat dissipation is replace by the liquid cooling circulation in the original structure through the external heat dissipation device, thereby avoiding the risk of the
coolant leaking inside the battery, and at the same time, the gas quantity of each battery unit can be timely controlled, so as to ensure that the battery is not invalidated due to the anti-polar reaction. The series
welding structure of the positive and negative electrodes of the
battery cell is adopted to reducethe series resistance and improve the power characteristics. Greatly reducing manufacturing costs; Simplified manufacturing and
assembly process facilitates large-scale production.