Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Dong-kee Sohn

Keon Kuk

Yong-soo Oh

Sang-Kyun Kang

Ji-Hyuk Lim

Mun-cheol Choi

Yong-Soo Lee

Hye-Jung Cho

Seog-Soon Baek

Xiaobing Luo

Seung-joo Shin

Sang-hyeon Choi

Min-Soo Kim

Jae-Yong Lee

Jin-ho Kim

Young-jae Kim

Young-Jae Kim

Hae-kyoung Kim

Seok-Rak Chang

Seung-jae Lee

Seung-Joo Shin

Joon-hee Kim

Sang-kyun Kang

Woong-Ho Cho

Woong-ho Cho

Kyung Hwan Choi

A direct liquid feed fuel cell system that includes a housing, a fuel cell stack in which air flow channels are formed, in the housing; and a fan that supplies air between the housing and a part of the air flow channels, wherein the fuel cell stack is obliquely mounted toward the fan. The fuel cell system can be arranged so that the airflow channels are substantially vertical, in order for air to be supplied between the housing and an upper part of the airflow channels, with the fuel cell stack downwardly obliquely mounted toward the fan. Furthermore, an outlet in the housing on an opposite side of the fuel cell stack from the fan can allow air that has passed through the air flow channels to be exhausted from the fuel cell system after passing through a space between a part of the fuel cell stack and the housing.

Direct liquid feed fuel cell system

A circuit connection control system of a fuel cell includes a point connection portion to which an anode current collecting portion and a cathode current collecting portion of each unit cell are electrically connected, a voltage measuring unit that measures an output voltage of each unit cell, a switching unit connecting the anode current collecting portions and the cathode current collecting portions of the plurality of unit cells at the point connection portion; and a DC-DC converter that converts a voltage generated from the fuel cell to a predetermined voltage. A method of operating the circuit connection control system includes measuring an output voltage of each unit cell; detecting a first unit cell showing an output voltage lower than a predetermined first voltage; and connecting the first unit cell in parallel to a second unit cell.

Circuit connection control system of fuel cell and method of operating the same

A flowing device for an optics-based methanol sensor includes an inner housing that surrounds the optics-based methanol sensor, an outer housing that surrounds the inner housing, a flow channel in the inner housing formed on a totally reflecting surface of the optics-based methanol sensor, a fuel inlet that is formed through the inner and outer housings and supplies liquid fuel to the flow channel, and a fuel outlet that is formed through the inner and outer housings and discharges the liquid fuel that has passed through the flow channel to an outside of the outer housing.

Flowing device for optics-based methanol sensor

A liquid fuel mixing apparatus includes a water chamber, a fuel chamber, and a partition arranged substantially vertically between the water chamber and the fuel chamber. The partition includes a passage to permit communication between the water chamber and the fuel chamber. The water chamber includes a first port for the inflow of water and air recovered from a cathode of the fuel cell. The fuel chamber includes a third port for the inflow of unreacted fuel and COfrom an anode of the fuel cell, a fourth port for the inflow of a liquid fuel from a liquid fuel tank, and a fifth port for the outflow of a mixed fuel to the fuel cell.

Liquid fuel mixing apparatus and direct liquid feed fuel cell system including the same

A liquid-gas separator for a direct liquid feed fuel cell includes a tube having an opening portion at a sidewall thereof; liquid extracting members that selectively transmit the liquid in the tube and located at both ends of the tube; a gas extracting membrane that selectively transmits the gas and covers the opening portion; an inlet that guides the liquid and the gas into the tube; chambers that surround an outer side of the liquid extracting member; and outlets that guide the liquid in the chambers to the outside by being connected to the chamber.

Liquid-gas separator for direct liquid feed fuel cell

A liquid-gas separator for a direct liquid feed fuel cell includes: a housing having an open hole; a gas extracting membrane that covers the open hole and transmits only the gas; a liquid extracting member that defines a first chamber that contacts the gas extracting membrane and a second chamber that does not contact the gas extracting membrane, and selectively transmits the liquid in the first chamber to the second chamber; an inlet that guides the liquid and the gas into the housing; and an outlet that is connected to the second chamber and guides the liquid in the second chamber to the outside.

A direct liquid feed fuel cell stack has a structure in which membrane electrode arrays (MEAs), each having an anode electrode and a cathode electrode on either side of an electrode membrane, are stacked and a conductive anode plate and a conductive cathode plate are respectively formed to face the anode electrode and the cathode electrode, wherein the cathode plate comprises a plurality of straight flow channels in parallel, and a hydrophilic member, whose upper surface has the same plane as a bottom surface of the straight flow channel, is disposed perpendicular to the flow channels on one end of the cathode plate.

Direct liquid feed fuel cell stack

An ink-jet printhead using a laser to expel ink includes an ink chamber to be filled with ink and an ink channel to supply the ink chamber with ink, the ink chamber and the ink channel formed in a passageway plate, a cover plate provided on the passageway plate, an ink ejection hole formed through the cover plate at a position corresponding to the ink chamber, a condenser lens provided on a bottom surface of the passageway plate at a position corresponding to the ink chamber, the laser irradiating a laser beam through the condenser lens and directly onto the ink contained in the ink chamber, to generate pressurized waves that vibrate a surface of the ink which causes an ink droplet to be expelled through the ink ejection hole from the surface of the ink.

Ink-jet printhead and ink expelling method using a laser

A method of driving an ink-jet printhead, which heats ink contained in an ink chamber using a heater to generate and expand a bubble within the ink chamber and ejects ink from the ink chamber using an expansive force of the bubble, the method including applying a main pulse to the heater to eject ink and applying a post pulse to the heater after ink has been ejected.

Method of driving an ink-jet printhead

A thermally-driven ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected, a manifold for supplying ink, and an ink channel for providing flow communication therebetween. First and second sidewalls are formed to a predetermined depth from an upper surface of the substrate and define the ink chamber to have a substantially rectangular shape. A nozzle plate including a plurality of material layers is formed on the substrate. A nozzle passes through the nozzle plate and is in flow communication with the ink chamber. A heater is disposed between the nozzle and one of the first sidewalls above the ink chamber. A conductor is electrically connected to the heater. The conductor and the heater are disposed within the nozzle plate. A shifting feature moves cavitation points beyond an outer edge of the heater.

Thermally-driven ink-jet printhead capable of preventing cavitation damage to a heater

An ink-jet printhead includes a substrate having an ink chamber and a manifold, a nozzle plate formed on the substrate, first and second heaters, first and second conductors, and first and second ink channels. The nozzle plate includes a plurality of passivation layers formed of an insulating material, a heat dissipation layer formed on the passivation layers and made of a thermally conductive material, and a nozzle passing through the nozzle plate and in flow communication with the ink chamber. The first and second heaters and conductors are interposed between adjacent passivation layers of the nozzle plate. The ink channels are interposed between the ink chamber and the manifold, for providing flow communication between the ink chamber and the manifold. The first and second heaters, conductors and ink channels are symmetric with respect to the nozzle.

Ink-jet printhead with improved ink ejection linearity and operating frequency

An ink-jet printhead includes an ink chamber to be filled with ink to be ejected, a manifold, which supplies ink to the ink chamber, an ink channel, which provides communication between the ink chamber and the manifold, a nozzle through which ink is ejected from the ink chamber, first and second heaters, which heat ink in the ink chamber to generate bubbles, and a conductor, which is electrically connected to the first and second heaters and applies a current to the first and second heaters, wherein the first and second heaters are positioned symmetrically around a center of the nozzle, and one of the first and second heaters is positioned adjacent to the ink channel.

Growing community of inventors

Seoul, South Korea

Dong-kee Sohn