Open Mesh Or Perforated Plate Patents (Class 429/241)
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Patent number: 7776468Abstract: A wafer alkaline cell of a laminar structure is disclosed. The cell comprises an anode assembly and a cathode assembly bonded together to form a laminate structure. There may be one and desirably two anode frames securing an anode current collector sheet sandwiched therebetween. There may be a cathode frame bonded to the anode frames. There is an anode current collector sheet within the anode assembly. There is a cathode current collector sheet, optionally with an attached metal mesh embedded within the cathode assembly to assure good electrical contact with the cathode. Alternatively, a cathode endplate with spring action is employed which can move in response to changes of volume or pressure within the cathode, thereby maintaining good contact. The anode current collector may be precoated with a sealing metal forming an alkaline resistant metal oxide film to improve bonding to the frame. The cell is durable and preferably rigid and resists electrolyte leakage.Type: GrantFiled: May 12, 2006Date of Patent: August 17, 2010Assignee: The Gillette CompanyInventors: Thomas C. Richards, Stuart M. Davis, Jonathan M. Boulton, Charles E. O'Brien, Yali Tang
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Patent number: 7763084Abstract: A method of making a plurality of battery plates includes forming a strip including a plurality of battery grids. Each battery grid includes a grid network bordered by a frame element and includes a plurality of spaced apart grid wire elements. Each grid wire element has opposed ends joined to one of a plurality of nodes to define a plurality of open spaces in the grid network. The method also includes deforming at least a portion of a plurality of the grid wire elements such that the deformed grid wire elements have a first transverse cross-section at a point intermediate their opposed ends that differs from a second transverse cross-section taken at least one of their opposed ends. The method also includes applying a lead alloy coating to the strip, applying battery paste to the strip, and cutting the strip to form a plurality of battery plates.Type: GrantFiled: June 9, 2008Date of Patent: July 27, 2010Assignee: Johnson Controls Technology CompanyInventor: Yu-Lin Chen
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Patent number: 7622218Abstract: An electrode in sheet form includes a current collector and an electrode mixture layer carried on each side thereof. The electrode is bent in the longitudinal direction thereof, to cause a large number of cracks in at least the electrode mixture layer to be positioned on the inner side of the current collector when wound, such that the cracks extend from the surface of the electrode mixture layer to the current collector in the direction intersecting with the longitudinal direction of the electrode. This bending process includes the steps of: bending the electrode at a curvature that is smaller than that of the winding core at least once; and thereafter bending the electrode at a curvature that is equal to or larger than that of the winding core. For example, this process is performed by arranging rollers such that their diameters decrease gradually and pressing the electrode against these rollers. This invention provides an electrode that does not break when wound to form an electrode assembly.Type: GrantFiled: April 6, 2006Date of Patent: November 24, 2009Assignee: Panasonic CorporationInventors: Kozo Watanabe, Masao Fukunaga, Ichiro Yasuoka, Toshiro Kume
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Publication number: 20090258299Abstract: A battery grid includes a frame that includes a top element, a bottom element, a first side element, and a second side element. The battery grid also includes a plurality of wires provided within the frame and defining a plurality of open areas and a current collection lug extending from the top element in a first direction. The battery grid further includes at least one feature provided in the battery grid that is configured to reduce the amount of growth of the battery grid in the first direction due to corrosion of the battery grid during the life of the battery grid.Type: ApplicationFiled: November 20, 2007Publication date: October 15, 2009Inventors: Wen-Hong Kao, Glenn W. Andersen, M. Eric Taylor, Kenneth A. Adams, Edward N. Mrotek, Jeffrey P. Zagrodnik, Shu Jen F. Kao
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Publication number: 20090246618Abstract: The present disclosure is directed to an electrode grid for a battery. The electrode grid may include at least one active material retaining segment, the active material retaining segment including one or more channels. The at least one active material retaining segment may be formed of at least one of carbon foam and graphite foam. In addition, the electrode grid may include a conductive material deposited within the one or more channels.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Inventor: Keith W. Dirks
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Patent number: 7432018Abstract: A cylindrical alkaline storage battery suitable to increase its capacity and arranged to prevent a short circuit and internal resistance increase, including an electrode group held in an outer can and formed by rolling up together a negative electrode having a negative-electrode core body and a hydrogen-absorbing alloy layer supported thereon, a positive electrode, and a separator. The negative electrode includes a main part forming inside part of the electrode group, a thin part smaller than the main part in the thickness of the hydrogen-absorbing alloy layer and the amount of a hydrogen-absorbing alloy contained in unit volume of that layer, and a boundary part formed between the main and thin parts and having a hydrogen-absorbing alloy layer thickness varying along the length of the negative-electrode core body. The positive electrode outer end and the negative electrode boundary part are at different positions circumferentially of the electrode group.Type: GrantFiled: August 3, 2004Date of Patent: October 7, 2008Assignee: SANYO Electric Co., Ltd.Inventor: Koji Taguchi
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Patent number: 7398581Abstract: A method of making a plurality of battery plates includes forming a strip including a plurality of battery grids. Each battery grid includes a grid network bordered by a frame element and includes a plurality of spaced apart grid wire elements. Each grid wire element has opposed ends joined to one of a plurality of nodes to define a plurality of open spaces in the grid network. The method also includes deforming at least a portion of a plurality of the grid wire elements such that the deformed grid wire elements have a first transverse cross-section at a point intermediate their opposed ends that differs from a second transverse cross-section taken at at least one of their opposed ends. The method also includes applying a lead alloy coating to the strip, applying battery paste to the strip, and cutting the strip to form a plurality of battery plates.Type: GrantFiled: November 23, 2004Date of Patent: July 15, 2008Assignee: Johnson Controls Technology CompanyInventor: Yu-Lin Chen
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Publication number: 20080076028Abstract: A battery separator for extending the cycle life of a battery has a separator and a conductive layer. The conductive layer is disposed upon the separator. The conductive layer is adapted to be in contact with the positive electrode of the battery thereby providing a new route of current to and from the positive electrode.Type: ApplicationFiled: September 27, 2006Publication date: March 27, 2008Inventors: Eric Henri Miller, John Randolph Timmons, John Kevin Whear
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Publication number: 20080050656Abstract: A monolithically integrated lithium thin film battery (10) provides increased areal capacity on a single level (without stacking of multiple cells). The Lithium thin film battery (10) comprises a substrate (12) having a surface (13) textured to comprise a plurality of openings (16) having sides (15) angled between 10 and 80 degrees to the surface (13). A current collector (18) and a cathode (22) are formed on the substrate (12) and within the openings (16). An electrolyte (24) comprising lithium phorphous oxynitride is formed by physical vapor deposition on the cathode (22), thereby providing a layer on the surface of the cathode (22) and within the openings (16) of the cathode having substantially the same thickness. An anode (26) and a capping layer (28) are then formed on the electrolyte (24).Type: ApplicationFiled: August 25, 2006Publication date: February 28, 2008Inventor: Kurt W. Eisenbeiser
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Patent number: 7318983Abstract: The invention provides a battery achieving excellent battery characteristics by using, as an anode active material, any of metal elements and metalloid elements each of which can form an alloy with a lithium, alloys of these elements, and compounds of these elements. Mesh projections as a frame structure are formed on the surface on the side facing an anode active material layer, of an anode collector. By the mesh projections, expansion and contraction in the plane direction of the anode active material layer is suppressed. Thus, pulverization, peeling, and the like of the anode active material layer caused by expansion and contraction thereof are prevented and the cycle characteristics are improved.Type: GrantFiled: March 31, 2003Date of Patent: January 15, 2008Assignee: Sony CorporationInventors: Momoe Adachi, Yukio Miyaki, Hiroshi Imoto
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Patent number: 7314685Abstract: A titanium substrate having a thickened outer oxidation layer provided thereon by a treatment process performed either in an air atmosphere at elevated temperatures or through electrolytic oxidation (anodization), is discribed. The thusly conditioned titanium substrate serving as a cathode current collector for an electrode incorporated into an electrochemical cell exhibits improved electrical performance in comparison to the prior art techniques, i.e., electrically conducted carbon coated titanium screen and use of highly corrosion resistant materials, upon subsequent elevated temperature exposure.Type: GrantFiled: October 7, 2003Date of Patent: January 1, 2008Assignee: Greatbatch Ltd.Inventors: W. Richard Brown, Christine A. Frysz, Sally Ann Smesko, Esther S. Takeuchi
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Patent number: 7270686Abstract: The present invention relates to a process for producing a fuel cell, comprising a step of forming a plurality of holes (10) in at least two substrates (9); each hole is in the seat of an individual fuel cell, the said holes having a particular geometry, such as a shape of a truncated cone or a truncated pyramid shape. The various individual cells are then electrically connected by networks of electrical connections (11, 12) and are supplied via a reactant distribution network, the assembly formed by a substrate (9), the cells and the networks constituting a base module (9?). Finally, at least two base modules (9?) are assembled, the individual cells of each base module being positioned facing the individual cells of the adjacent base module(s).Type: GrantFiled: November 15, 2002Date of Patent: September 18, 2007Assignee: Commissariat a l'Energie AtomiqueInventors: Jean Arroyo, Didier Bloch, Jean-Yves Laurent, Didier Marsacq
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Publication number: 20070193009Abstract: A method and apparatus for continuous, high-speed production of strip having an array of high-tolerance closely-spaced holes forming a continuous grid structure having wires bent out of the plane of the grid. The strip can be produced by continuous casting, extruding or by rolling reduction methods and the holes can be formed such as by linear punching and rotary punching.Type: ApplicationFiled: February 16, 2007Publication date: August 23, 2007Inventors: Albert M. Vincze, John V. Marlow
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Patent number: 7258950Abstract: An electrode having a current collector and, formed thereon, a thin film comprising an active material, characterized in that a thin alloy film (such as Sn—Co) comprising a metal which can form an alloy with lithium (such as Sn) and a metal which can not form an alloy with lithium (such as Co) is formed on a current collector such as a copper foil. It is preferred that the above metal which can form an alloy with lithium and the above metal which can not form an alloy with lithium can not form an intermetallic compound with each other.Type: GrantFiled: September 19, 2001Date of Patent: August 21, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Noriyuki Tamura, Shiori Nakamizo, Daizo Jito, Ryuji Ohshita, Masahisa Fujimoto, Shin Fujitani, Maruo Kamino
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Patent number: 7247409Abstract: The hydrogen storage alloy electrode comprises: a conductive core material; and an active material layer which contains a hydrogen storage alloy powder and is carried on said core material, and the alloy powder has any shape selected from the group consisting of spherical shapes, substantially spherical shapes and oval shapes. The core material comprises: a conductive sheet; and fibrous or columnar sintered nickel pieces bonded to the surface of the conductive sheet. Alternatively, the active material layer comprises: an active material layer A which contains a hydrogen storage alloy powder A with a mean particle size “a” and is carried on said core material; and an active material layer B which contains a hydrogen storage alloy powder B with a mean particle size “b” and is carried on said active material layer A (wherein a<b). Alternatively, the active material layer further contains a crushed alloy powder having on the surface thereof at least one selected from the group consisting of nickel and cobalt.Type: GrantFiled: February 21, 2003Date of Patent: July 24, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazutaka Ikeda, Susumu Kikuyama, Akiko Miyahara, Kohji Yuasa
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Patent number: 7191502Abstract: There is provided a current collector for use in a secondary battery on which active material coated on both sides of a metal foil are difficult to drop out. The metal foil is provided with a large number of penetrating holes, the periphery of which are formed into a complicated shape, and active material, binder, etc. are intruded on each periphery, whereby the active material, etc. coated on both sides of the current collector consisting of the metal foil are prevented from dropping out. An area S of penetrating holes is in the range of 0.05 to 0.50 mm2 a value M/N is in the range of 1.30 to 100 wherein M is the peripheral length of the penetrating holes and N is the peripheral length of a virtual circle having the area S of the penetrating hole. The current collector having such a large number of penetrating holes is obtained by passing a metal foil without a hole through between a concavo-convex roll having a large number of convex parts and a smoothing roll.Type: GrantFiled: July 29, 1998Date of Patent: March 20, 2007Assignees: Nippon Foil Mfg. Co., Ltd., Nippaku Sangyo Co., Ltd.Inventors: Koichi Ashizawa, Atsushi Mori
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Patent number: 7105252Abstract: A method for forming a corrosion resistant electrode for a battery includes supplying an electrode for use in the battery and exposing the electrode to an environment including vaporized carbon. At least some of the carbon from the environment may be transferred to the electrode.Type: GrantFiled: April 25, 2003Date of Patent: September 12, 2006Assignee: Firefly Energy, Inc.Inventors: Kurtis C. Kelley, Steven C. Taylor
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Patent number: 7060391Abstract: A battery, a battery electrode structure, and methods to make the same. The product and method comprise applying a layer of lead-tin containing alloy to substrates for anodes or cathodes for lead-acid batteries, in which the substrates are porous or reticulated.Type: GrantFiled: March 26, 2004Date of Patent: June 13, 2006Assignee: Power Technology, Inc.Inventors: Elod Gyenge, Joey Jung, Alvin A. Snaper
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Patent number: 7033703Abstract: A composite material including a first carbon foam structure including a network of pores and a second carbon foam structure including a network of pores. An intermediate bonding structure is disposed at least in part between the first and second carbon foam structures.Type: GrantFiled: December 20, 2002Date of Patent: April 25, 2006Assignee: Firefly Energy, Inc.Inventors: Kurtis C. Kelley, Charles F. Ostermeier, Matthew J. Maroon
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Patent number: 7033702Abstract: A matted particulate electrode located between the current collector and a porous separator of a rechargeable lithium battery is described, which contains electro-active particles intermixed with pliable, solid, lithium ion conducting, polymer electrolyte filaments having adhesive surfaces. The electro-active particles and the optionally added electro-conductive carbon particles adhere to the tacky surface of the adhesively interlinking polymer electrolyte filaments. The matted particulate electrode is impregnated with an organic solution containing another lithium compound. In a second embodiment the porous separator is coated on at least one of its faces, with polymer electrolyte having an adhesive surface and made of the same polymer as the electrolyte filaments. The polymer electrolyte filaments in the matted layer may adhere to the coated surface of the separator.Type: GrantFiled: September 3, 2004Date of Patent: April 25, 2006Assignee: Electrovaya Inc.Inventors: Sankar Dasgupta, James K. Jacobs, Rakesh Bhola
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Patent number: 7029797Abstract: An electrode plate for an alkaline storage battery of the present invention includes a conductive core material as a current collector, in which a plurality of through-holes are linearly provided in the core material so as to be parallel to a longitudinal direction of the core material, each through-hole having an aperture area of 10 mm2 or less and at least two pairs of opposite sides parallel to each other.Type: GrantFiled: May 17, 2002Date of Patent: April 18, 2006Assignees: Matsushita Electric Industrial Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Naoto Sato, Nobuyasu Morishita
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Patent number: 7000297Abstract: The present invention relates to a current collector for an electrochemical cell. The current collector is a substrate having a grid pattern comprising open areas converging at an imaginary focal point on a connector tab of the substrate. The openings are grouped into distinct regions with the larger openings immediately adjacent to the connector tab and the smaller openings distant there from. This provides more conductive pathways at greater distances from the tab.Type: GrantFiled: November 27, 2002Date of Patent: February 21, 2006Assignee: Wilson Greatbatch Technologies, Inc.Inventors: Dominick Frustaci, Tina Urso, Gary Freitag
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Patent number: 6921611Abstract: A method of making a battery includes forming a strip of interconnected grids from a grid material by feeding a continuous strip of the grid material along a linear path aligned with the longitudinal direction of the strip and punching grid material out of the strip. Each interconnected grid includes a plurality of wires, with each wire having opposed ends joined to one of a plurality of nodes to define a plurality of open spaces. The method also includes modifying at least one of the wires at a position intermediate the opposed ends of the wire such that a first transverse cross-section taken intermediate the opposed ends of the wire differs from a second transverse cross-section of the wire taken at one of the opposed ends of the wire. The method further includes applying paste to the strip and cutting the strip to form a plurality of plates.Type: GrantFiled: July 2, 2001Date of Patent: July 26, 2005Assignee: Johnson Controls Technology CompanyInventors: Charles J. Schaeffer, Jeffrey L. Troxel, M. Eric Taylor, Wen-Hong Kao, Christian P. Hansen, Yu-Lin Chen, Dan J. Cantillon, Bart Sauer
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Patent number: 6893777Abstract: The present invention relates to a current collector for an electrochemical cell. The current collector has a unique grid structure comprised of a frame supporting a plurality of radial strands as conductors radiating outwardly from a focal point on a connector tab. The frame and radial conductors are maintained in a fan-like orientation with respect to each other by two groups of concentric conductor strands, one located adjacent to the tab, the other spaced a substantial distance therefrom. The radiating conductors provide a more direct path to the connector tab for electron flow. This results in the current collector having reduced internal resistance in comparison to conventional current collector designs.Type: GrantFiled: February 12, 2002Date of Patent: May 17, 2005Assignee: wilson Greatbatch Ltd.Inventor: Joseph M. Probst
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Patent number: 6884548Abstract: It is intended to provide a nonaqueous electrolyte battery that satisfies both of a large discharge capacity and a superior cycle life characteristic by developing a novel negative electrode material. A nonaqueous electrolyte battery uses a negative electrode active material that is a compound expressed by Formula (1): AzMXy??(1) where A is at least one element selected from the alkali metals, M is at least one element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Os, Ir, Pt, and Mg, X is at least one element selected from the group consisting of B, N, Al, Si, P, Ga, Ge, As, In, Sn, Sb, Pb, and Bi, 0?z?20, and 0.2?y?6.Type: GrantFiled: December 27, 2002Date of Patent: April 26, 2005Assignee: Kabushiki Kaisha ToshibaInventors: Hiroki Inagaki, Norio Takami, Tatsuoki Kohno, Tomokazu Morita
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Patent number: 6875536Abstract: A composite hydrogen storage material including 1) an active material having hydrogen storage capacity; and 2) a catalytic material having greater catalytic activity toward the dissociation of molecular hydrogen and/or oxidation of hydrogen than that of said active material having hydrogen storage capacity. Also, a fuel cell employing anodes formed from the composite hydrogen storage material. The fuel cell has the ability to start up instantly and can accept recaptured energy such as that of regenerative braking by operating in reverse as an electrolyzer.Type: GrantFiled: August 12, 2002Date of Patent: April 5, 2005Assignee: Texaco Ovonic Fuel Cell LLCInventor: Stanford R. Ovshinsky
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Patent number: 6849361Abstract: A manufacturing method for a sintered substrate of alkaline batteries is provided. The manufacturing method includes a first step for mixing particles with a pore former and applying the mixture to a porous substrate, and a second step for sintering the porous substrate and the applied mixture. The particles are made of nickel or principally made of nickel, and the surfaces of the pore former particles each have a coating made of nickel or principally made of nickel. The pore former can be made from resin or any other materials if it disappears when sintered. The pore former particles should preferably have a spheric shape, but is does not matter whether the pore former particles are solid or hollow. Using such sintered substrate for an electrode, an alkaline storage battery can exhibit a high performance.Type: GrantFiled: January 25, 2002Date of Patent: February 1, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Hiroshi Fukuda, Masao Takee, Hideo Kasuga
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Patent number: 6815121Abstract: A matted particulate electrode located between the current collector and a porous separator of a rechargeable lithium battery is described, which contains electro-active particles intermixed with pliable, solid, lithium ion conducting, polymer electrolyte filaments having adhesive surfaces. The electro-active particles and the optionally added electro-conductive carbon particles adhere to the tacky surface of the adhesively interlinking polymer electrolyte filaments. The matted particulate electrode is impregnated with an organic solution containing another lithium compound. In a second embodiment the porous separator is coated on at least one of its faces, with polymer electrolyte having an adhesive surface and made of the same polymer as the electrolyte filaments. The polymer electrolyte filaments in the matted layer may adhere to the coated surface of the separator.Type: GrantFiled: July 17, 2001Date of Patent: November 9, 2004Assignee: Electrovaya Inc.Inventors: Sankar Dasgupta, James K. Jacobs, Rakesh Bhola
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Patent number: 6800398Abstract: A battery used by rolling a pole plate, formed by filling an active material, around a substrate using a band-shaped metal porous body having three-dimensionally linked spaces is inferior in flexibility and likely to short-circuit. According to this invention, grooves are formed in active material-filled substrate filled with the above active material, and then the grooved substrate is pressed flat to form groove active material layers, whereby cracks are made in the bottoms of the grooves preferentially, and cracks are pressed by the groove active material layers and blocked to prevent the flow-out of swelled projections of the cracks and the active material. Accordingly, a higher-capacity and higher-reliability battery is provided.Type: GrantFiled: June 13, 2001Date of Patent: October 5, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Satoshi Furuya, Gota Asano, Masaharu Miyahisa, Ayahito Shiosaki, Yoshihisa Inaba, Yoshiyuki Tada
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Patent number: 6800399Abstract: An electrode substrate is formed by mechanically processing a nickel foil so as to be made three dimensional through the creation of concave and convex parts, and then, this substrate is filled with active material or the like so that an electrode is manufactured, wherein the above described concave and convex parts are rolling pressed so as to incline in one direction. Furthermore, an electrode for secondary battery is formed by using the above described method.Type: GrantFiled: May 30, 2001Date of Patent: October 5, 2004Inventor: Isao Matsumoto
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Publication number: 20040191625Abstract: There is provided a battery and a negative electrode for the battery, which are capable of being simply produced by a smaller number of steps. The battery includes: a battery can (7); a negative electrode plate for battery (21), the negative electrode plate having a paste-like material which contains an active material and which is provided on the entire surface of a rectangular conductive porous substrate including edge portions (22a) extending along long sides of the substrate, the negative electrode plate being wound in a cylindrical shape to be inserted into the battery can; and a plate-shaped collector (28) having ribs (31) formed by raising part thereof, the ribs being resistance-welded to one of the edge portions of the conductive porous substrate while the paste-like material provided on the edge portions.Type: ApplicationFiled: February 26, 2004Publication date: September 30, 2004Applicant: SANOH KOGYO KABUSHIKI KAISHAInventor: Kazuo Kojima
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Patent number: 6797432Abstract: A cadmium negative electrode is prepared having excellent cycle characteristics without impairing the production efficiency even in case the impurities incorporated during filling the active material should be removed by heat treatment. The method includes filling the nickel sintered substrate with an active material based on cadmium hydroxide to obtain an active material filled electrode plate; heating the active material filled electrode plate to change at least a part of the thus filled active material based on cadmium hydroxide into cadmium oxide; adding polyvinyl alcohol into the active material; and hydrating the active material filled electrode plate added with polyvinyl alcohol i.e., immersing the electrode plate in an alkaline solution to convert cadmium oxide into cadmium hydroxide.Type: GrantFiled: March 22, 2002Date of Patent: September 28, 2004Assignee: Sanyo Electric Co., Ltd.Inventor: Akihiko Konsha
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Patent number: 6790561Abstract: The invention is directed to an electrochemical cell having at least one of its electrodes produced by coating a slurry mixture of an active material, possibly a conductive additive, and a binder dispersed in a solvent and contacted to a perforated current collector foil. It is particularly important that the active slurry does not move through the perforations of the current collector. For this reason, a barrier is placed against the opposite side of the current collector to block the perforations as the current collector is being coated with the slurry. After volatilizing the solvent, a second, different active material is coated to the opposite side of the current collector, either as a slurry, a pressed powder, a pellet or a free standing sheet. An example of this is a cathode having a configuration of: SVO/current collector CFx. The opposed active materials on the current collector can also be of the same chemistry.Type: GrantFiled: March 12, 2002Date of Patent: September 14, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi, Robert S. Rubino
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Patent number: 6790557Abstract: A battery section for a Li-ion and/or Li-ion polymer cell, comprised of: a planar metal mesh layer having a body portion and a coplanar tab portion defining a battery lead extending from one edge of the mesh layer; electrode film laminated to opposite surfaces of the body portion of the metal mesh layer; and a protective layer on at least one side of the tab, the protective layer having a portion of the tab that is adjacent to the electrode film, the protective layer comprised of an outer polymer layer and an inner adhesive layer adhering the outer polymer layer to the portion of the tab.Type: GrantFiled: August 21, 2002Date of Patent: September 14, 2004Assignee: NGK Spark Plug Co., Ltd.Inventors: Xuekun Xing, Jeffrey M. Smith
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Patent number: 6783891Abstract: Fuel cell oxygen electrode and instant startup fuel cells employing such oxygen electrode. The oxygen electrode operates through the mechanism of redox couples which uniquely provide multiple degrees of freedom in selecting the operating voltages available for such fuel cells. Such oxygen electrodes provide the fuel cells in which they are used a “buffer” or “charge” of oxidizer available within the oxygen electrode at all times.Type: GrantFiled: September 16, 2003Date of Patent: August 31, 2004Assignee: Energy Conversion Devices, Inc.Inventors: Stanford R. Ovshinsky, Srinivasan Venkatesan, Boyko Aladjov, Subhash Dhar, Kevin Fok, Thomas Hopper
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Patent number: 6780543Abstract: A first lithium secondary battery of the present invention is formed by placing at least a positive electrode, a negative electrode, and a non-aqueous electrolyte in a battery case in which a positive electrode connecting member to which the positive electrode is connected and a negative electrode connecting member to which the negative electrode is connected are electrically separated, wherein said positive electrode connecting member is composed of clad material comprising one of aluminum or aluminum alloy and one of austenitic stainless steel or ferrite stainless steel, and the aluminum or aluminum alloy in the clad material is in the positive electrode side.Type: GrantFiled: January 9, 2002Date of Patent: August 24, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Seiji Yoshimura, Hiroshi Nakajima, Maruo Kamino
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Publication number: 20040142235Abstract: A lithium polymer battery configured with at least one continuous electrode and at least two discontinuous electrodes having an opposite charge from the continuous electrode. The continuous electrode may be either an anode or a cathode, and the discontinuous electrode is the other of the continuous electrode. The cell may be a multicell or a multibicell. The continuous electrode is the outermost electrode of a configured cell, and facilitates such configurations such as folding the cell, rolling the cell, etc. The discontinuous electrode is in the interior of the configured cell. The adhered layers of the cell thus configured have enhanced processing and performance efficiency, and may be manufactured with greater productivity and decreased costs.Type: ApplicationFiled: January 22, 2003Publication date: July 22, 2004Inventor: Mohammad Parsian
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Publication number: 20040131943Abstract: A titanium substrate having a thickened outer oxidation layer provided thereon by a treatment process performed either in an air atmosphere at elevated temperatures or through electrolytic oxidation (anodization), is discribed. The thusly conditioned titanium substrate serving as a cathode current collector for an electrode incorporated into an electrochemical cell exhibits improved electrical performance in comparison to the prior art techniques, i.e., electrically conducted carbon coated titanium screen and use of highly corrosion resistant materials, upon subsequent elevated temperature exposure.Type: ApplicationFiled: October 7, 2003Publication date: July 8, 2004Inventors: W. Richard Brown, Christine A. Frysz, Sally Ann Smesko, Esther S. Takeuchi
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Publication number: 20040131930Abstract: A nonaqueous electrolyte secondary cell comprises a rolled-up electrode unit 2 composed of a positive electrode 23, a negative electrode 21 and a separator 22 interposed therebetween, and a negative electrode current collector plate 3 and a positive electrode current collector plate 30 joined to the respective ends of the electrode unit 2. The negative electrode collector plate 3 is joined to an edge of the negative electrode 21 projecting at one of the opposite ends of the electrode unit 2. The collector plate 3 has a two-layer structure comprising a copper layer 31 made of copper or an alloy consisting predominantly of copper, and a metal layer made of a metal not forming an intermetallic compound with lithium and having a lower laser beam reflectivity than copper or an alloy consisting predominantly of the metal. The collector plate 3 has its copper layer 31 contacted with the edge of the negative electrode 21 and welded thereto with a laser beam.Type: ApplicationFiled: December 22, 2003Publication date: July 8, 2004Inventors: Naoya Nakanishi, Kouichi Satoh, Toshiyuki Nohma, Ikuo Yonezu
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Patent number: 6756152Abstract: An electrode for the alkaline storage battery includes a binding agent containing thermoplastic xylene-formaldehyde resin. Since the thermoplastic xylene-formaldehyde resin is non-aqueous, it is not dissolved into moisture in the air or the alkaline electrolyte within the battery. The electrode is prepared by immersing an active-material-applied or -filled electrode substrate in a solution in which the thermoplastic xylene-formaldehyde resin is dissolved; immersing it in an emulsion of the thermoplastic xylene-formaldehyde resin with an emulsifier; or applying or filling a slurry of the active material with an emulsion of the thermoplastic xylene-formaldehyde resin to or in the electrode substrate. The electrode retains the active material using a binding agent which has excellent adhesion to the active material and imparts high binding capacity of the active materials with one another.Type: GrantFiled: March 22, 2001Date of Patent: June 29, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Tetsuyuki Murata, Tadashi Ise, Teruhiko Imoto, Yasuhiko Ikeda
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Patent number: 6756156Abstract: In a rectangular alkaline storage battery, the sides of negative cores of negative electrode plates 10, which are disposed at the outermost positions of the group of electrode plates and oppose an outer casing can 40, are exposed. The pore ratios (ratio of total area taken up by pores to area of electrode plate) of the exposed cores must be made lower than those of the other unexposed cores. The pore ratio of the exposed negative core is specified as falling within a range of 10% to 40%. As a result, the negative electrode plates 10 are improved in binding strength, thereby inhibiting exfoliation of an active material. Further, there can be obtained a large rectangular alkaline storage battery which has superior permeability for a gas which would arise in the battery, an improved capacity ratio, and greater volumetric energy density.Type: GrantFiled: February 27, 2002Date of Patent: June 29, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Yasuhiko Ikeda, Masao Takee, Teruhiko Imoto, Masao Inoue, Tetsuyuki Murata, Atsutoshi Ako
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Patent number: 6743547Abstract: An electrode having the configuration: first active material/current collector/second active material is described. One of the electrode active materials in a cohesive form of active particles being firmly held together as part of the same mass is incapable of moving through the current collector to the other side thereof. However, in an un-cohesive form of active particles not being firmly held together as part of a mass, the one electrode active material is capable of communication through the current collector. The other or second active material is in a form in-capable of communication through the current collector, whether it is in a cohesive or un-cohesive powder form. Then, the assembly of first active material/current collector/second active material is pressed from either the direction of the first electrode active material to the second electrode active material, or visa versa.Type: GrantFiled: November 13, 2001Date of Patent: June 1, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Sally Ann Smesko, Esther S. Takeuchi
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Patent number: 6740441Abstract: Provided are low-cost, mechanically strong, highly electronically conductive current collects and associated structures for solid-state electrochemical devices, techniques for forming these structures, and devices incorporating the structures. The invention provides solid state electrochemical devices having as current interconnects a ferritic steel felt or screen coated with a protective oxide film.Type: GrantFiled: December 18, 2002Date of Patent: May 25, 2004Assignee: The Regents of the University of CaliforniaInventors: Craig P. Jacobson, Steven J. Visco, Lutgard C. DeJonghe
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Patent number: 6740454Abstract: An organic electrolytic cell having a positive electrode, a negative electrode, and an electrolyte comprising a solution of a lithium salt in an aprotic organic solvent, wherein a positive electrode collector and a negative electrode collector have pores that penetrate from the front surface to the back surface, a positive electrode active material and a negative electrode active material can reversibly carry lithium, and, when the lithium derived from the negative electrode or the positive electrode is in electrochemical contact with the lithium disposed opposite the negative electrode or the positive electrode, the whole or part of the lithium passes through at least one layer of the positive electrode or the negative electrode and is carried. The opposing area of the lithium is not larger than 40 % of the area of the negative electrode and the porosity of each current collector is not less than 1 % and not more than 30 %.Type: GrantFiled: January 29, 2001Date of Patent: May 25, 2004Assignee: Kanebo LimitedInventors: Nobuo Ando, Masaki Yamaguchi, Yukinori Hato
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Patent number: 6737196Abstract: A lithium (Li) polymer battery is provided. The Li polymer battery includes: a positive plate including a positive collector having a plurality of openings and a positive active material layer on at least one surface of the positive collector; a negative plate including a negative collector in a foil form, and a negative active material layer on at least on surface of the negative collector; and a separator between the positive and negative plates, for insulating the positive and negative plates.Type: GrantFiled: October 12, 1999Date of Patent: May 18, 2004Assignee: Samsung Display Devices Co., Ltd.Inventors: Youn-han Chang, Jung-ho Kim
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Patent number: 6733926Abstract: An electrode component for an electrochemical cell or a capacitor is described wherein the electrode is produced by physical vapor depositing an electrode active material onto a substrate to coat the substrate. The thusly produced electrode is useful as a cathode in a primary electrochemical cell and as a cathode and an anode in a secondary cell, and as an electrode in an electrochemical capacitor and an electrolytic capacitor.Type: GrantFiled: December 12, 2001Date of Patent: May 11, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Barry C. Muffoletto, Ashish Shah, Neal N. Nesselbeck
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Publication number: 20040081890Abstract: A battery section for a Li-ion and/or Li-ion polymer cell, comprised of:Type: ApplicationFiled: August 21, 2002Publication date: April 29, 2004Applicant: NGK Spark Plug Co., Ltd.Inventors: Xuekun Xing, Jeffrey M. Smith
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Patent number: 6727022Abstract: The present comprises an electrode having the configuration: first active material/current collector screen/second active material. When one of the active materials is in a powder form, it is possible for that material to move through openings in the current collector screen to “contaminate” the interface between the other active material and the current collector. The present invention consists of having the other electrode active materials in a form incapable of moving through the current collector to the other side thereof. Then, the assembly is pressed from the direction of the other electrode active material. This seals off the current collector as the pressing force moves the current collector against the powdered electrode active material.Type: GrantFiled: November 19, 2001Date of Patent: April 27, 2004Assignee: Wilson Greatbatch Ltd.Inventors: Hong Gan, Esther S. Takeuchi
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Patent number: 6678926Abstract: An improved apparatus and method for making lead-acid storage battery plates comprising an alignment puncher for creating a plurality of alignment holes in a lead strip as the lead strip is progressively expanded and cut into a grid like pattern on an expander die system. The alignment of the lead strip is accomplished by inserting at least one alignment pin into at least one of the plurality of alignment holes that have been punched into the lead strip as the lead strip is progressively expanded and cut into a plurality of wire-like segments along opposing edges of the lead strip. After each cut, the alignment pin retracts while the lead strip is indexed.Type: GrantFiled: June 22, 2001Date of Patent: January 20, 2004Assignee: Delphi Technologies, Inc.Inventor: Jimmy H. Watters
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Publication number: 20040009402Abstract: The invention provides a battery achieving excellent battery characteristics by using, as an anode active material, any of metal elements and metalloid elements each of which can form an alloy with a lithium, alloys of these elements, and compounds of these elements. Mesh projections as a frame structure are formed on the surface on the side facing an anode active material layer, of an anode collector. By the mesh projections, expansion and contraction in the plane direction of the anode active material layer is suppressed. Thus, pulverization, peeling, and the like of the anode active material layer caused by expansion and contraction thereof are prevented and the cycle characteristics are improved.Type: ApplicationFiled: March 31, 2003Publication date: January 15, 2004Inventors: Momoe Adachi, Yukio Miyaki, Hiroshi Imoto