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公开(公告)号：US20230061466A1
公开(公告)日：2023-03-02
申请号：US17948580
申请日：2022-09-20
Applicant: Greatbatch Ltd.
Inventor： Anthony C. Perez , Christina Scheuer , Barry C. Muffoletto , Jason T. Hahl
Abstract: A wet tantalum electrolytic capacitor containing a cathode, fluidic working electrolyte, and anode formed from an anodically oxidized sintered porous tantalum pellet is described. The pellet is formed from a pressed tantalum powder. The tantalum powder is formed by reacting a tantalum oxide compound, for example, tantalum pentoxide, with a reducing agent that contains a metal having an oxidation state of 2 or more, for example, magnesium. The resulting tantalum powder is nodular or angular and has a specific charge that ranges from about 9,000 μF*V/g to about 11,000 μF*V/g. Using this powder, wet tantalum electrolytic capacitors have breakdown voltages that ranges from about 340 volts to about 450 volts. This makes the electrolytic capacitors ideal for use in an implantable medical device.
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公开(公告)号：US20170148576A1
公开(公告)日：2017-05-25
申请号：US15356727
申请日：2016-11-21
Applicant: Greatbatch Ltd.
Inventor： Jason T. Hahl , Barry C. Muffoletto , Todd C. Sutay , Glenn A. Dumais , Wendy J. Baumler
CPC classification number: H01G9/042 , A61N1/375 , A61N1/378 , A61N1/3968 , H01G9/0029 , H01G9/008 , H01G9/02 , H01G9/0425 , H01G9/052 , H01G9/06 , H01G9/10 , H01G9/12 , H01G9/14 , H01G2009/05
Abstract: A capacitor having at least two side-by-side anodes with a cathode current collector disposed between the anodes and housed inside a casing is described. Cathode active material is supported on the opposed major faces of the current collector and the current collector/cathode active material subassembly is housed in a first separator envelope. The first separator envelope is positioned between the side-by-side anodes and this electrode assembly is then contained in a second separator envelope. The two anodes can be connected in parallel inside or outside casing, or they can be unconnected to each other. There is also cathode active material supported on inner surfaces of the casing in a face-to-face alignment with an adjacent one of the anodes. That way, the second separator envelope also prevents direct physical contact between the anode pellets and the cathode active material supported on the casing sidewalls.
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公开(公告)号：US09633796B2
公开(公告)日：2017-04-25
申请号：US15095196
申请日：2016-04-11
Applicant: Greatbatch Ltd.
Inventor： Yanming Liu , Barry C. Muffoletto , Jason T. Hahl
IPC: H01G4/232 , H01G9/052 , H01G9/145 , H01G9/10 , H01G9/02 , B22F3/00 , B22F3/11 , B22F1/00 , B22F3/24 , H01G9/00 , B22F5/00
CPC classification number: H01G9/0525 , B22F1/0096 , B22F3/002 , B22F3/11 , B22F3/24 , B22F5/00 , B22F2998/10 , B22F2999/00 , H01G9/0029 , H01G9/0032 , H01G9/02 , H01G9/052 , H01G9/10 , H01G9/145 , B22F9/04 , B22F3/02 , B22F3/10 , B22F2003/242 , B22F2201/11 , B22F1/0014 , B22F1/004 , B22F3/1109
Abstract: Tantalum powders produced using a tantalum fiber precursor are described. The tantalum fiber precursor is chopped or cut into short lengths having a uniform fiber thickness and favorable aspect ratio. The chopped fibers are formed into a primary powder having a controlled size and shape, narrow/tight particle size distribution, and low impurity level. The primary powder is then agglomerated into an agglomerated powder displaying suitable flowability and pressability such that pellets with good structural integrity and uniform pellet porosity are manufacturable. The pellet is sintered and anodized to a desired formation voltage. The thusly created capacitor anode has a dual morphology or dual porosity provided by a primary porosity of the individual tantalum fibers making up the primary powder and a larger secondary porosity formed between the primary powders agglomerated into the agglomerated powder.
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公开(公告)号：USRE48439E1
公开(公告)日：2021-02-16
申请号：US16381423
申请日：2019-04-11
Applicant: Greatbatch Ltd.
Inventor： Yanming Liu , Barry C. Muffoletto , Jason T. Hahl
Abstract: Tantalum powders produced using a tantalum fiber precursor are described. The tantalum fiber precursor is chopped or cut into short lengths having a uniform fiber thickness and favorable aspect ratio. The chopped fibers are formed into a primary powder having a controlled size and shape, narrow/tight particle size distribution, and low impurity level. The primary powder is then agglomerated into an agglomerated powder displaying suitable flowability and pressability such that pellets with good structural integrity and uniform pellet porosity are manufacturable. The pellet is sintered and anodized to a desired formation voltage. The thusly created capacitor anode has a dual morphology or dual porosity provided by a primary porosity of the individual tantalum fibers making up the primary powder and a larger secondary porosity formed between the primary powders agglomerated into the agglomerated powder.
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公开(公告)号：USRE47435E1
公开(公告)日：2019-06-11
申请号：US14645539
申请日：2015-03-12
Applicant: Greatbatch Ltd.
Inventor： Ashish Shah , Christina Scheuer , Lauren (Miller) Matyjas , Barry C. Muffoletto
IPC: H01G9/022
Abstract: An electrolyte for activating an electrolytic or electrochemical capacitor is described. The electrolyte preferably includes a mixed solvent of water and ethylene glycol having an ammonium salt dissolved therein. An acid such as phosphoric or acetic acid is used to provide a pH of about 3 to 6. The electrolyte is particularly useful for activating a ruthenium oxide/tantalum capacitor having an anode breakdown voltage in the range of 175 to 300 volts.
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Patent Agency Ranking
公开(公告)号：US09312075B1
公开(公告)日：2016-04-12
申请号：US14479689
申请日：2014-09-08
Applicant: Greatbatch Ltd.
Inventor： Yanming Liu , Barry C. Muffoletto , Jason T. Hahl
CPC classification number: H01G9/0525 , B22F1/0096 , B22F3/24 , B22F5/00 , B22F2998/10 , B22F2999/00 , H01G9/0032 , H01G9/02 , H01G9/052 , H01G9/145 , B22F9/04 , B22F3/02 , B22F3/10 , B22F2003/242 , B22F2201/11 , B22F1/0014
Abstract: Tantalum powders produced using a tantalum fiber precursor are described. The tantalum fiber precursor is chopped or cut into short lengths having a uniform fiber thickness and favorable aspect ratio. The chopped fibers are formed into a primary powder having a controlled size and shape, narrow/tight particle size distribution, and low impurity level. The primary powder is then agglomerated into an agglomerated powder displaying suitable flowability and pressability such that pellets with good structural integrity and unifrom pellet porosity are manufacturable. The pellet is sintered and anodized to a desired formation voltage. The thusly created capacitor anode has a dual morphology or dual porosity provided by a primary porosity of the individual tantalum fibers making up the primary powder and a larger secondary porosity formed between the primary powders agglomerated into the agglomerated powder.
Abstract translation: 描述了使用钽纤维前体制备的钽粉末。 将钽纤维前体切碎或切割成具有均匀的纤维厚度和有利的纵横比的短长度。 短切纤维形成具有受控尺寸和形状，窄/紧密粒度分布和低杂质水平的初级粉末。 然后将初级粉末凝聚成显示合适的流动性和压制性的附聚粉末，使得具有良好结构完整性和均匀颗粒孔隙度的颗粒是可制造的。 将颗粒烧结并阳极氧化至所需的地层电压。 由此产生的电容器阳极具有由构成初级粉末的各个钽纤维的初级孔隙率提供的双重形态或双重孔隙，并且在附聚到聚集的粉末中的初级粉末之间形成较大的次生孔隙。
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公开(公告)号：US11450486B2
公开(公告)日：2022-09-20
申请号：US17221444
申请日：2021-04-02
Applicant: Greatbatch Ltd.
Inventor： Jason T. Hahl , Christina Scheuer , Barry C. Muffoletto , Anthony C. Perez
Abstract: A wet tantalum electrolytic capacitor containing a cathode, fluidic working electrolyte, and anode formed from an anodically oxidized sintered porous tantalum pellet is provided. The pellet is formed from a pressed tantalum powder. The tantalum powder is formed by reacting a tantalum oxide compound, for example, tantalum pentoxide, with a reducing agent that contains a metal having an oxidation state of 2 or more, for example, magnesium. The resulting tantalum powder is nodular or angular and has a specific charge that ranges from about 11,000 μF*V/g to about 14,000 μF*V/g. Using this powder, wet tantalum electrolytic capacitors have breakdown voltages that ranges from about 250 volts to about 400 volts. This makes the electrolytic capacitors ideal for use in an implantable medical device.
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公开(公告)号：US20210313118A1
公开(公告)日：2021-10-07
申请号：US17221444
申请日：2021-04-02
Applicant: Greatbatch, Ltd.
Inventor： Jason T. Hahl , Christina Scheuer , Barry C. Muffoletto , Anthony C. Perez
Abstract: A wet tantalum electrolytic capacitor containing a cathode, fluidic working electrolyte, and anode formed from an anodically oxidized sintered porous tantalum pellet is provided. The pellet is formed from a pressed tantalum powder. The tantalum powder is formed by reacting a tantalum oxide compound, for example, tantalum pentoxide, with a reducing agent that contains a metal having an oxidation state of 2 or more, for example, magnesium. The resulting tantalum powder is nodular or angular and has a specific charge that ranges from about 11,000 μF*V/g to about 14,000 μF*V/g. Using this powder, wet tantalum electrolytic capacitors have breakdown voltages that ranges from about 250 volts to about 400 volts. This makes the electrolytic capacitors ideal for use in an implantable medical device.
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公开(公告)号：US09978528B2
公开(公告)日：2018-05-22
申请号：US15356727
申请日：2016-11-21
Applicant: Greatbatch Ltd.
Inventor： Jason T. Hahl , Barry C. Muffoletto , Todd C. Sutay , Glenn A. Dumais , Wendy J. Baumler
IPC: H01G9/02 , H01G9/042 , H01G9/10 , H01G9/052 , H01G9/008 , H01G9/00 , A61N1/375 , A61N1/39 , H01G9/06 , H01G9/12 , H01G9/14 , H01G9/04
CPC classification number: H01G9/042 , A61N1/375 , A61N1/378 , A61N1/3968 , H01G9/0029 , H01G9/008 , H01G9/02 , H01G9/0425 , H01G9/052 , H01G9/06 , H01G9/10 , H01G9/12 , H01G9/14 , H01G2009/05
Abstract: A capacitor having at least two side-by-side anodes with a cathode current collector disposed between the anodes and housed inside a casing is described. Cathode active material is supported on the opposed major faces of the current collector and the current collector/cathode active material subassembly is housed in a first separator envelope. The first separator envelope is positioned between the side-by-side anodes and this electrode assembly is then contained in a second separator envelope. The two anodes can be connected in parallel inside or outside casing, or they can be unconnected to each other. There is also cathode active material supported on inner surfaces of the casing in a face-to-face alignment with an adjacent one of the anodes. That way, the second separator envelope also prevents direct physical contact between the anode pellets and the cathode active material supported on the casing sidewalls.
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公开(公告)号：US09824829B1
公开(公告)日：2017-11-21
申请号：US15467254
申请日：2017-03-23
Applicant: Greatbatch Ltd.
Inventor： Barry C. Muffoletto , Anthony C. Perez
CPC classification number: H01G11/80 , A61N1/378 , H01G9/008 , H01G9/0425 , H01G9/06 , H01G9/08 , H01G9/10 , H01G9/26 , H01G11/46 , H01G11/52
Abstract: A capacitor is described. A casing for the capacitor comprises a container having a face wall joined to a surrounding sidewall extending to a annular edge defining an open end of the container. An inwardly extending protrusion is located intermediate the face wall and the annular edge at the container open end. A partition plate is supported on the protrusion to thereby provide a first capacitor enclosure bounded by the face wall, the surrounding sidewall and the partition plate. A cover plate is secured to the annular edge to close the open end of the container and provide a second capacitor enclosure bounded by the partition plate, the surrounding sidewall and the cover plate. An anode, for example of tantalum, and a cathode active material, for example of ruthenium oxide, reside in capacitive association with each other inside each of the first and second capacitor enclosures. A working electrolyte is also contained in the capacitor enclosures. Finally, leads extend from each anode through insulative seals structures supported by the casing for making electrical connection to the capacitor.
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