Abstract: A water electrolysis separator includes a first plate member having a reaction part configured to define a reaction region in which a reaction is produce by a membrane electrode assembly (MEA). The first plate member has first manifold flow paths spaced apart from the reaction part and first channel patterns extending from edges of the first manifold flow paths and defining first connection channels configured to connect the reaction part and the first manifold flow paths. The separator includes a second plate member stacked on the first plate member, configured to cover the first connection channels, and including a through portion corresponding to the reaction part and second manifold flow paths corresponding to the first manifold flow paths. The separator includes a sealing member configured to seal a portion between the first plate member and the second plate member.

Abstract: An electrochemical apparatus includes a separator having a first reaction region and a second reaction region; a first reaction layer disposed to correspond to the first reaction region; a second reaction layer disposed to correspond to the second reaction region; a first partition wall portion protruding from one surface of the separator, disposed along a boundary between the first reaction layer and the second reaction layer, and including a first connecting flow path configured to connect the first reaction region and the second reaction region so that the first reaction region and the second reaction region fluidically communicate with each other through the first connecting flow path; and a first sealing member disposed at an end portion of the first partition wall portion and configured to seal a portion between the first reaction layer and the second reaction layer, enlarging a reaction region without increasing a size of a reaction layer.

Abstract: An electrochemical apparatus includes a reaction layer including a membrane electrode assembly (MEA); and separators respectively stacked on two opposite surfaces of the reaction layer, wherein each separator includes first channels disposed on a first surface thereof and second channels disposed on a second surface thereof, in which the separators are disposed such that the first channels or the second channels thereof face each other with the reaction layer interposed therebetween, simplifying a structure and a manufacturing process.

Abstract: A coolant control system of a fuel cell may include the fuel cell; a coolant line allowing a coolant to circulate therein and connected to the fuel cell to be heat-exchangeable with the fuel cell; an ion removal line provided with an ion filter and connected to a first portion and a second portion of the coolant line to allow a coolant branched from the first portion of the coolant line to pass through the ion filter and then flow into the second portion of the coolant line again; an adjusting valve adjusting a ratio between coolants respectively flowing into the coolant line and the ion removal line; and a controller engaged to the adjusting valve and configured for controlling the adjusting valve based on a temperature of the fuel cell or an output voltage of the fuel cell.

Abstract: A fuel cell stack includes a reaction layer having a MEA, an anode separator having a gas channel formed at a first side facing the reaction layer and through which a first reactant gas flows, and a cooling channel formed at a second side and through which a coolant flows. The anode separator abuts the reaction layer. A cathode separator abuts anode separator so that a first side of the cathode separator covers the cooling channel. A porous structural unit has a partition wall protruding from the second side of the cathode separator and has a flow path for a second reactant gas to minimize a cooling temperature deviation and improve operational efficiency.

Abstract: A coolant control system of a fuel cell may include the fuel cell; a coolant line allowing a coolant to circulate therein and connected to the fuel cell to be heat-exchangeable with the fuel cell; an ion removal line provided with an ion filter and connected to a first portion and a second portion of the coolant line to allow a coolant branched from the first portion of the coolant line to pass through the ion filter and then flow into the second portion of the coolant line again; an adjusting valve adjusting a ratio between coolants respectively flowing into the coolant line and the ion removal line; and a controller engaged to the adjusting valve and configured for controlling the adjusting valve based on a temperature of the fuel cell or an output voltage of the fuel cell.

Abstract: A fuel cell stack includes a reaction layer having a MEA, an anode separator having a gas channel formed at a first side facing the reaction layer and through which a first reactant gas flows, and a cooling channel formed at a second side and through which a coolant flows. The anode separator abuts the reaction layer. A cathode separator abuts anode separator so that a first side of the cathode separator covers the cooling channel. A porous structural unit has a partition wall protruding from the second side of the cathode separator and has a flow path for a second reactant gas to minimize a cooling temperature deviation and improve operational efficiency.

Abstract: Provided is a flat tubular solid oxide fuel cell stack, and more particularly, a flat tubular solid oxide fuel cell stack in which a connection member is interposed between a plurality of fuel cells to smoothly supply air and increase a contact area, in order to enable a stable electrical contact.

Abstract: Provided is a flat tubular solid oxide fuel cell stack, and more particularly, a flat tubular solid oxide fuel cell stack in which a connection member is interposed between a plurality of fuel cells to smoothly supply air and increase a contact area, in order to enable a stable electrical contact.