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1
US2005287435A1
Publication/Patent Number: US2005287435A1
Publication date: 2005-12-29
Application number: 11/154,567
Filing date: 2005-06-17
Inventor: Kim, Yong-sam  
Assignee: Kim, Yong-Sam
Abstract: A secondary battery includes: an electrode assembly having a winding including a positive electrode, a negative electrode, and a separator interposed therebetween, the winding centered around a winding axis; a case adapted to receive the electrode assembly, the winding axis being parallel to a longitudinal axis of the case; and first and second cap assemblies adapted to respectively seal opposite ends of the case, the first and second cap assemblies respectively having positive and negative electrode terminals electrically coupled to the electrode assembly. The electrode assembly is adapted to respectively be connected to the first and second cap assemblies by parts of the electrode assembly not coated with active materials, the parts of the electrode assembly not coated with active materials being arranged at opposite ends of the electrode assembly perpendicular to the winding axis. A secondary battery includes: an electrode assembly having a winding including a positive electrode, a negative electrode, and a separator interposed therebetween, the winding centered around a winding axis; a case adapted to receive the electrode assembly, the winding axis ...more ...less
2
US2005271938A1
Publication/Patent Number: US2005271938A1
Publication date: 2005-12-08
Application number: 11/176,400
Filing date: 2005-07-08
Abstract: In a flat non-aqueous electrolyte secondary cell comprising an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte in the inside of a cathode case, a plurality of electrode units each consisting of the cathode and the anode opposite to each another via the separator are laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator is wound to form an electrode group, or a sheet-shape cathode is wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode is set on the sheet-shaped cathode in a right angled position each other and then these cathode and anode are bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in this electrode group is larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or than the area of an opening in a sealed plate in a sealed portion in the cathode case, whereby the discharge capacity upon heavy-loading discharge is significantly increased as compared with the conventional cells. Accordingly, while the size of the cell is small, the discharge capacity is increased as described above, and thus it is possible to provide a highly utilizable flat non-aqueous electrolyte secondary cell. Further, in said flat non-aqueous electrolyte secondary cell, problems which may be caused by the increased discharge capacity in the cell can be solved by improving the solvent and supporting electrolyte for the electrolyte or by various improvements in the cathode and anode cases. In a flat non-aqueous electrolyte secondary cell comprising an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte in the inside of a cathode case, a plurality of electrode units each consisting of the cathode and ...more ...less
3
US2005164079A1
Publication/Patent Number: US2005164079A1
Publication date: 2005-07-28
Application number: 11/046,339
Filing date: 2005-01-27
Inventor: Kim, Bong  
Assignee: Kim, Bong
Abstract: A can type secondary battery includes an electrode assembly having a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate, a can for receiving the electrode assembly therein, and a cap assembly coupled to an opening section of the can. A cap plate is formed with an electrolyte injection hole and a soft aluminum plug welded to the electrolyte injection hole so as to seal the electrolyte injection hole. A can type secondary battery includes an electrode assembly having a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate, a can for receiving the electrode assembly therein, and a ...more ...less
4
US2005106456A1
Publication/Patent Number: US2005106456A1
Publication date: 2005-05-19
Application number: 10/712,018
Filing date: 2003-11-14
Abstract: A gasket is for use in a starved electrolyte bipolar battery. The gasket may be made from a hydrophobic material in the shape of a frame to prevent the creation of an electrolyte path between adjacent cells when mounted in a battery. The frame may be designed to at least partially encompass a biplate when mounted in a bipolar battery, and include a device or way to permit gas passage through the gasket. The gasket may be made from a material with deformable properties to provide a sealing to a biplate and/or endplate when mounted in a bipolar battery, whereby an outer pressure tight seal of the battery may be obtained. A starved bipolar battery and a method for manufacturing a starved bipolar battery are also disclosed. A gasket is for use in a starved electrolyte bipolar battery. The gasket may be made from a hydrophobic material in the shape of a frame to prevent the creation of an electrolyte path between adjacent cells when mounted in a battery. The frame may be designed to at least ...more ...less
5
US2005214641A1
Publication/Patent Number: US2005214641A1
Publication date: 2005-09-29
Application number: 11/087,698
Filing date: 2005-03-24
Inventor: Kim, Yong-sam  
Assignee: Kim, Yong-Sam
Abstract: A cap assembly for a secondary battery maybe constructed with a cap cover, a tab plate arranged along one side of the cap cover, and a vent plate arranged between the cap cover and the tab plate. The tab plate has a current breaking portion configured to be torn by a predetermined force, and the vent plate has a vent dedicated to be altered, or broken, by a predetermined force. The current breaking portion is attachedly fixed to the vent, and the center point of the current breaking portion and the point where the current breaking portion is attached to the vent are not coincident. A cap assembly for a secondary battery maybe constructed with a cap cover, a tab plate arranged along one side of the cap cover, and a vent plate arranged between the cap cover and the tab plate. The tab plate has a current breaking portion configured to be torn by a ...more ...less
6
US2005175882A1
Publication/Patent Number: US2005175882A1
Publication date: 2005-08-11
Application number: 10/985,085
Filing date: 2004-11-04
Abstract: In a fuel cell assembly (1) comprising an electrolyte layer (2) having a frame (21) and an electrolyte (22) retained in the frame, a pair of separators (5, 6) are bonded to the electrolyte layer by that a metallic material (27) is deposited on one of the frame and each separator and a laser beam is irradiated onto the metallic material through the frame or the separator in a state that the frame and each separator contact each other whereby the metallic material forms a eutectic with the other of the frame and each separator. In a fuel cell assembly (1) comprising an electrolyte layer (2) having a frame (21) and an electrolyte (22) retained in the frame, a pair of separators (5, 6) are bonded to the electrolyte layer by that a metallic material (27) is deposited on one of the frame and each separator ...more ...less
7
US2005244709A1
Publication/Patent Number: US2005244709A1
Publication date: 2005-11-03
Application number: 10/521,219
Filing date: 2003-12-03
Inventor: Bucher, Jurgen  
Abstract: An electrode pack having at least two flat electrodes. The electrodes are placed on a patient and have flat contact areas, which are located on an electrode body and which have a gel, a connecting cable, and have an air-tight closure. A structure that is advantageous for handling and reliability is formed because the closure, while encircling the contact areas, has sealing means joined in an air-tight manner to both electrode bodies, and the connecting cables are guided out of the electrode bodies outside of the sealing means. An electrode pack having at least two flat electrodes. The electrodes are placed on a patient and have flat contact areas, which are located on an electrode body and which have a gel, a connecting cable, and have an air-tight closure. A structure that is advantageous for ...more ...less
8
US2005244710A1
Publication/Patent Number: US2005244710A1
Publication date: 2005-11-03
Application number: 10/905,717
Filing date: 2005-01-18
Abstract: A sealing ring assembly and an improved method for mounting a sealing ring into an electrochemical cell used for Electrochemical Capacitance Voltage (ECV) profiling measurements. The ring is located in a holder having at least one secondary bore providing fluid communication between a forward face of the holder and the central bore of the ring, directed parallel to but tangentially offset relative to the inner wall of the central bore so as to impart a degree of rotational flow to electrolyte entering the sealing ring through the or each secondary bore which effectively removes gas bubbles and refreshes the electrolyte. The holder facilitates ring removal with a much reduced risk of damage to the delicate sealing surface. A sealing ring assembly and an improved method for mounting a sealing ring into an electrochemical cell used for Electrochemical Capacitance Voltage (ECV) profiling measurements. The ring is located in a holder having at least one secondary bore providing fluid communication ...more ...less
9
US2005079400A1
Publication/Patent Number: US2005079400A1
Publication date: 2005-04-14
Application number: 10/928,807
Filing date: 2004-08-27
Abstract: A seal member is formed integrally on surfaces of a metal separator of a fuel cell. The seal member includes an outer seal and an inner seal provided on a surface of the metal separator. A plurality of closure seals are formed integrally with an inner edge of the inner seal. The closure seals close a space between the inner seal and a protrusion forming a fuel gas flow field. A seal member is formed integrally on surfaces of a metal separator of a fuel cell. The seal member includes an outer seal and an inner seal provided on a surface of the metal separator. A plurality of closure seals are formed integrally with an inner edge of the inner seal. The ...more ...less
10
US2005031933A1
Publication/Patent Number: US2005031933A1
Publication date: 2005-02-10
Application number: 10/635,123
Filing date: 2003-08-06
Abstract: The present invention relates to an electrically conductive element (e.g. bipolar plate) for a fuel cell which has an improved adhesive bond. The conductive element generally comprises a first and a second conductive sheet, each having a surface that confront one another. The surfaces that confront one another are overlaid with an electrically conductive primer coating providing corrosion protection and low contact resistance to said first and said second sheets respectively in regions where the first and second sheets contact one another. The first and said second coated surfaces are joined to one another by an electrically conductive adhesive which provides adhesion of said first and said second coated surfaces of said sheets at the contact region. Further, the present invention contemplates methods to form such an improved bond in an electrically conductive element. The present invention relates to an electrically conductive element (e.g. bipolar plate) for a fuel cell which has an improved adhesive bond. The conductive element generally comprises a first and a second conductive sheet, each having a surface that confront one another. The ...more ...less
11
US2005026024A1
Publication/Patent Number: US2005026024A1
Publication date: 2005-02-03
Application number: 10/899,987
Filing date: 2004-07-27
Abstract: A polymer electrolyte fuel cell comprises an electrolyte membrane-electrode assembly, a pair of conductive separator plates sandwiching the electrolyte membrane of the electrolyte membrane-electrode assembly, and a pair of sealing means sealing between the electrodes of the electrolyte membrane-electrode assembly and the separator plates. The pair of sealing means is constituted by combination of a flat sealing member having a flat portion in flat contact with the electrolyte membrane and of a linear sealing member having a rib in linear contact with the electrolyte membrane, and at least part of the rib is in the form of falling in the direction to the electrode when the electrolyte membrane, the pair of electrodes and the pair of separator plates are stacked to be cramped. This makes it possible for the fuel cell to have an excellent sealing property and a stable output characteristic. A polymer electrolyte fuel cell comprises an electrolyte membrane-electrode assembly, a pair of conductive separator plates sandwiching the electrolyte membrane of the electrolyte membrane-electrode assembly, and a pair of sealing means sealing between the electrodes of the ...more ...less
12
US2005053832A1
Publication/Patent Number: US2005053832A1
Publication date: 2005-03-10
Application number: 10/970,323
Filing date: 2004-10-21
Inventor: Ray, Robert   Wu, James  
Abstract: A low profile collector and seal assembly for sealing the open end of a container of an electrochemical cell and providing venting of pressurized gases. An electrochemical cell has a can with a closed bottom end and an open top end, positive and negative electrodes disposed in the can, and a collector and seal assembly disposed in the open top end of the can for closing the open top end of the can. The collector and seal assembly includes a current collector and an annular seal that move relative to each other from a sealed position to a vented position when the internal cell pressure reaches a pressure threshold to vent pressurized gases. A low profile collector and seal assembly for sealing the open end of a container of an electrochemical cell and providing venting of pressurized gases. An electrochemical cell has a can with a closed bottom end and an open top end, positive and negative electrodes disposed in ...more ...less
13
US2005042511A1
Publication/Patent Number: US2005042511A1
Publication date: 2005-02-24
Application number: 10/956,514
Filing date: 2004-09-30
Inventor: Kaneta, Hiroshi  
Abstract: A flat secondary battery having a fusion-bonded sealing type laminate film as an armored body tends to be inferior in sealing reliability to a flat secondary battery having a welded sealing type can as an armored body, due to a difference in sealing method between the two batteries. Therefore, there has been a large challenge of finding the way to make the sealing reliability of the laminate film secondary battery closer to that of the can type secondary battery. The sealing reliability is improved by further increasing a sealing force without taking any measure to the existing laminate film secondary battery, in such a manner that the fusion bonding area of the existing laminate film secondary battery is sandwiched from upside and downside to be cramped from outside so as to mechanically add a sealing force from outside to the sealing force of the laminate film itself. A flat secondary battery having a fusion-bonded sealing type laminate film as an armored body tends to be inferior in sealing reliability to a flat secondary battery having a welded sealing type can as an armored body, due to a difference in sealing method between the two ...more ...less
14
US2005064266A1
Publication/Patent Number: US2005064266A1
Publication date: 2005-03-24
Application number: 10/490,067
Filing date: 2002-09-17
Abstract: A modular unitized electrochemical fuel cell cartridge (20) is formed from a mono-polar anode plate (22), a second mono-polar cathode plate (24 ) and a solid polymer membrane electrode assembly (26) operably interposed between the anode and the cathode. An electrochemical fuel cell stack is provided having at least one removable fuel cell cartridge, a pair of current collectors which are individually disposed on opposite sides of the anode and the cathode plates and a pair of end plates which are individually disposed on opposite sides of the current collectors from the anode and cathode plates. Sealing ridges (42) and mating grooves (44) as well as alignment means (46) enable the easy assembly of a modular unitized fuel cell cartridge and stacking said cartridge. A modular unitized electrochemical fuel cell cartridge (20) is formed from a mono-polar anode plate (22), a second mono-polar cathode plate (24 ) and a solid polymer membrane electrode assembly (26) operably interposed between the anode and the cathode. An electrochemical fuel ...more ...less
15
US2005064283A1
Publication/Patent Number: US2005064283A1
Publication date: 2005-03-24
Application number: 10/880,878
Filing date: 2004-06-30
Abstract: An electrochemical cell is provided having a cathode can that fits over an anode can to define an anode cavity for retaining active anode material. A cathode assembly is disposed proximal the base of the anode can, and is separated from the anode cavity via a separator. A radial seal is provided at the remote region between the outer periphery of the anode side wall and cathode side wall to prevent the leakage of electrolyte material. An insulator is disposed between the anode and cathode to provide electrical insulation therebetween. An electrochemical cell is provided having a cathode can that fits over an anode can to define an anode cavity for retaining active anode material. A cathode assembly is disposed proximal the base of the anode can, and is separated from the anode cavity via a separator. A radial ...more ...less
16
US2005019644A1
Publication/Patent Number: US2005019644A1
Publication date: 2005-01-27
Application number: 10/627,035
Filing date: 2003-07-25
Abstract: A fuel cell gasket assembly for use in conjunction with a fuel cell stack by placing the gasket assembly between the periphery of a face of the stack and a manifold. The periphery of the stack face includes periphery portions that expand differently during operation of the stack. The gasket assembly comprises a member adapted to have different compressibilities over predetermined portions of the member and/or a resilient shim embedded in preselected sections the member whereby the gasket maintains contact with the periphery of the stack face and the manifold. The structure of the gasket assembly of the present invention provides a compliant fuel cell gasket assembly that accommodates bipolar plate growth and end cell growth in the fuel cell stack and maintains the gas seal between the stack and manifold structure. A fuel cell gasket assembly for use in conjunction with a fuel cell stack by placing the gasket assembly between the periphery of a face of the stack and a manifold. The periphery of the stack face includes periphery portions that expand differently during operation of the ...more ...less