Abstract: Disclosed is a power control method and a power control apparatus. The power control method comprises the steps of: a first charge comparison step for receiving charge information of supplied power, and comparing the charge of the supplied power with a preset reference charge; and a second charge comparison step for comparing the charge of the supplied power with the preset lowest charge. The method comprises the steps of: a first power quantity comparison step for confirming a stored power quantity within a power storage unit, and comparing the stored power quantity with a preset reference power quantity; and a second power quantity comparison step for comparing the stored power quantity with a preset power quantity demand. Further, the method comprises a control step for selecting one of externally supplied power and internally stored power as the usage power for the customer, through at least one of a charge comparison step and the power quantity comparison step.

Abstract: A fuel cell system comprises: a fuel cell stack (100) where an anode (110) and a cathode (120) are arranged under a state that an electrolyte membrane is positioned therebetween; a fuel tank (300) for storing a fuel; a fuel circulation supply means (400) for circulation-supplying a fuel stored in the fuel tank (300) to the anode of the fuel cell stack; an air supply unit (200) connected to the cathode of the fuel cell stack (100) by an air supply line, for supplying oxygen, etc. to the cathode (120); a sensing unit (500) for measuring a concentration of at least one of fuels supplied to the anode (110) and a control unit for receiving a signal of the sensing unit (500) and informing replacement time of a fuel. According to this, a fuel usage is maximized by informing replacement time of a used fuel and a filter (450) for filtering impurity by detecting a fuel consumption degree and an impurity generation amount.

Abstract: A multi-unit fuel cell system that includes a common-use reforming unit configured to supply hydrogen to multiple fuel cell units that are installed in multiple units, such as apartments within an apartment building. In one example embodiment, a fuel cell system including a common-use reforming unit and multiple fuel cell units is disclosed. The common-use reforming unit is configured to supply hydrogen to the plurality of fuel cell units. Each fuel cell unit includes a stack unit, an air supplying unit, an integral heat exchange unit, a hot-water supplying unit, an auxiliary heat supplying unit, and an electric output unit.

Abstract: A fuel cell system comprises: a DBFC for generating a power by receiving a fuel; a PEMFC for generating a power by receiving hydrogen, a byproduct generated at an anode of the DBFC after a reaction, as a fuel; a supplementary power partially charged by a power generated at the DBFC and the PEMFC and discharging the charged power; a load sensing unit for sensing a load connected to the DBFC, the PEMFC, and the supplementary power; and a control unit for controlling a power of the DBFC, the PEMFC, and the supplementary power according to a load sensed by the load sensing unit and thereby selectively supplying to the load. According to this, hydrogen generated at the DBFC is recycled, and a load amount is sensed thus to stably correspond to a load variation, thereby maximizing a fuel usage efficiency and stably driving the system.

Abstract: A fuel cell system comprises: a fuel storage means for storing a fuel; a direct borohydride fuel cell (DBFC); a fuel circulation supply means for circulation and supplying a fuel to an anode of the DBFC from the fuel storage means; a polymer electrolyte membrane fuel cell (PEMFC) for receiving hydrogen generated at the anode of the DBFC as a fuel; a hydrogen control means for controlling hydrogen generated from the anode of the DBFC in correspondence to an amount required by the PEMFC and thereby supplying the hydrogen to the PEMFC; and an air supply means for supplying air to a cathode of the DBFC and an cathode of the PEMFC.

Abstract: A multi-unit fuel cell system that includes a common-use reforming unit configured to supply hydrogen to multiple fuel cell units that are installed in multiple units, such as apartments within an apartment building. In one example embodiment, a fuel cell system including a common-use reforming unit and multiple fuel cell units is disclosed. The common-use reforming unit is configured to supply hydrogen to the plurality of fuel cell units. Each fuel cell unit includes a stack unit, an air supplying unit, an integral heat exchange unit, a hot-water supplying unit, an auxiliary heat supplying unit, and an electric output unit.

Abstract: In a MEA (membrane electrode assembly) of a fuel cell including an electrolyte membrane as an ion transfer medium arranged between a bipolar plate having a fuel side open groove in which fuel flows and a bipolar plate having an air side open groove in which air flows so as to form a fuel path with the fuel side open groove and form an air path with the air side open groove; and a catalyst electrode inserted into the fuel side open groove so as to be separated from the electrolyte membrane in order to form a fuel path with both sides thereof and induce electrochemical oxidation with the fuel, by activating action occurred on the fuel electrode in which fuel is supplied and the air electrode in which air is supplied, current generating efficiency can be improved.

Abstract: A fuel cell system is provided which produces improved reaction speed and performance. The fuel cell system includes a fuel cell stack including an anode, a cathode, and an electrolyte membrane disposed therebetween. A fuel tank supplies hydrogen-based fuel to the anode of the fuel cell stack, and an oxidant supplying unit adds ozone to oxygen- including air supplies it to the cathode of the fuel cell stack. The ozone supplied to the cathode of the fuel cell stack accelerates a reaction speed in the fuel cell stack, thereby producing a relatively high current density and improving fuel cell performance.

Abstract: A fuel cell system comprises: a fuel storage means (100) for storing a fuel; a DBFC (200); a fuel circulation supply means (300) for circulation-supplying a fuel to an anode of the DBFC from the fuel storage means (100); a PEMFC (400) for receiving hydrogen generated from the anode of the DBFC as a fuel; a hydrogen control means (500) for controlling hydrogen generated from the anode of the DBFC in correspondence to an amount required by the PEMFC and thereby supplying the hydrogen to the PEMFC (400); and an air supply means (600) for supplying air to a cathode of the DBFC and a cathode of the PEMFC.

Abstract: A fuel cell system comprises: a fuel cell stack (100) where an anode (110) and a cathode (120) are arranged under a state that an electrolyte membrane is positioned therebetween; a fuel tank (300) for storing a fuel; a fuel circulation supply means (400) for circulation-supplying a fuel stored in the fuel tank (300) to the anode of the fuel cell stack; an air supply unit (200) connected to the cathode of the fuel cell stack (100) by an air supply line, for supplying oxygen, etc. to the cathode (120); a sensing unit (500) for measuring a concentration of at least one of fuels supplied to the anode (110) and a control unit for receiving a signal of the sensing unit (500) and informing replacement time of a fuel. According to this, a fuel usage is maximized by informing replacement time of a used fuel and a filter (450) for filtering impurity by detecting a fuel consumption degree and an impurity generation amount.

Abstract: A fuel cell system comprises: a DBFC for generating a power by receiving a fuel; a PEMFC for generating a power by receiving hydrogen, a byproduct generated at an anode of the DBFC after a reaction, as a fuel; a supplementary power partially charged by a power generated at the DBFC and the PEMFC and discharging the charged power; a load sensing unit for sensing a load connected to the DBFC, the PEMFC, and the supplementary power; and a control unit for controlling a power of the DBFC, the PEMFC, and the supplementary power according to a load sensed by the load sensing unit and thereby selectively supplying to the load. According to this, hydrogen generated at the DBFC is recycled, and a load amount is sensed thus to stably correspond to a load variation, thereby maximizing a fuel usage efficiency and stably driving the system.

Abstract: Disclosed are a fuel cell system and a control method thereof. The fuel cell system comprises: a main fuel cell stack (6) that an anode (2) and a cathode (4) are arranged in a state that an electrolyte membrane is interposed therebetween; a fuel supplying unit connected with the anode of the main fuel cell stack (6) by a fuel supplying line (16) for supplying hydrogen-including fuel to the anode; an air supplying unit (10) connected to the cathode of the main fuel cell (6) stack by an air supplying line (20) for supplying oxygen-including air to the cathode (4); and a sub fuel cell stack (14) for using hydrogen generated at the anode (2) during reaction as fuel. According to this, energy efficiency of a fuel cell can be increased and danger due to exhaustion of hydrogen generated at the fuel cell stack (6) can be decreased.

Abstract: A fuel cell system includes a stack unit that generates electricity by electrochemically reacting hydrogen and air; a fuel supply unit that supplies hydrogen to the stack unit; an air supply unit that supplies air to the stack unit; and a module unit having a used gas line that exhausts used gas generated from the fuel supply unit, having a fuel supply line that supplies hydrogen provided from the fuel supply unit to the stack unit, and having an air supply line that supplies air provided from the air supply unit to the stack unit, in which the used gas line, the fuel supply line, and the air supply line are sequentially arranged and integrally modularized. Hydrogen and air each having a required temperature from the stack unit are supplied to the stack unit, thereby improving thermal efficiency of the fuel cell system.

Abstract: This disclosure relates to a fuel cell heating and electricity generating system. In one example embodiment a fuel cell heating system includes a fuel cell; a storage tank configured to store a liquid heated by heat generated at the fuel cell; a radiating unit installed at a space requiring a heat supply; a first connection line connecting the storage tank to the radiating unit, the first connection line configured to facilitate the flow of fluid from the storage tank to the radiating unit; and a second connection line connecting the storage tank to the radiating unit, the second connection line configured to facilitate the flow of fluid from the radiating unit to the storage tank.

Abstract: A fuel cell system comprising: a fuel cell stack (6) including an anode (2), a cathode (4), and an electrolyte membrane disposed therebetween; a fuel supplying unit connected with the anode of the fuel cell stack (6) by a fuel supplying line (14) for supplying hydrogen-including fuel to the anode (2); an air supplying unit (10) connected with the cathode of the fuel cell stack by an air supplying line (48) for supplying oxygen-including air to the cathode of the fuel cell stack; and a heating unit (12) for heating fuel supplied to the fuel cell stack into a proper temperature. According to this, a power source for driving the heating unit (12) is not required thus to enhance a performance of a fuel cell.

Abstract: In a bipolar plate of a fuel cell including a plate having a certain area and thickness; inflow and outflow buffer grooves respectively formed at both sides of the plate so as to have a certain area and depth; plural channels for connecting the inflow buffer groove and the outflow buffer groove; plural buffer protrusions formed in the inflow and outflow buffer grooves so as to have a certain height; an inflow path formed on the plate so as to be connected to the inflow buffer groove; and an outflow path formed on the plate so as to be connected to the outflow buffer groove, it is possible to uniformize flux distribution and reduce flow resistance of fuel and air respectively flowing into a fuel electrode and an air electrode of a fuel cell.

Abstract: Disclosed is a fuel cell system comprising: a fuel tank connected to a anode of a fuel cell stack for supplying hydrogen-including fuel to the anode; an air supplying unit connected to a cathode of the fuel cell stack for supplying oxygen-including air to the cathode; a heating unit for heating air and fuel supplied to the fuel cell stack; and a purge unit for returning fuel remaining at each system to the fuel tank when a system driving is stopped. According to this, a temperature of the fuel cell stack can reach a goal temperature within the shortest time by heating fuel at the time of driving a system, and fuel remaining at the fuel cell stack and each system is returned to the fuel tank when the system driving is stopped, thereby increasing a performance of the fuel cell system.

Abstract: Disclosed is a fuel cell system comprising: a fuel cell stack including an anode, a cathode, and an electrolyte membrane disposed therebetween; a fuel tank for supplying hydrogen-including fuel to the anode of the fuel cell stack; and an oxidant supplying unit for adding ozone to oxygen-including air and thereby supplying to the cathode of the fuel cell stack. According to this, ozone is supplied to the cathode of the fuel cell stack thus to accelerate a reaction speed in the fuel cell stack and thereby to obtain a relatively high current density.

Abstract: In a structure for reducing internal circuit of a fuel cell including adjacently stacked unit cells; a fuel side distributing means for connecting each fuel side inflow path of the unit cells and insulating them; and an air side distributing means for connecting each air side inflow path of the unit cells, electric connection among the stacked plural unit cells by fuel as an electrolyte solution and electric leakage by additional parts can be minimized.

Abstract: An electrode of an electrochemical battery includes: an electrode catalyst and a catalyst holding body for holding and confining the electrode catalyst by being entangled with the electrode catalyst. A fabrication method of the electrode is simple, and the electrode has a small volume, high flexibility and durability. A specific surface area of the electrode catalyst is large and an efficiency of the battery can be improved.