Patents by Inventor Ernest Ndzebet
Ernest Ndzebet has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240055704Abstract: A header for an electrochemical cell includes a planar plate configured to cover an internal volume of the electrochemical cell, and a side wall extending from an upper surface of the planar plate in a direction perpendicular to the upper surface. The header also includes a recess defined by the upper surface of the planar plate and the side wall, and a first step and a second step on a lower surface of the planar plate, the first step and the second step configured to seal the internal volume. An aspect of an electrochemical cell includes an anode, a cathode, a cell casing and the header.Type: ApplicationFiled: December 14, 2021Publication date: February 15, 2024Inventors: Dong ZHANG, Jason MUDGE, David DARCH, Mario DESTEPHEN, Ernest NDZEBET, Uma JANAKIRAMAN, Michael J. GORDON
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Publication number: 20220006146Abstract: An electrochemical cell that converts chemical energy to electrical energy includes a cathode with an active material of fluorinated carbon on a perforated metal cathode current collector, a lithium anode on a perforated metal anode current collector, a stepped header, a stable electrolyte, and a separator. In various embodiments, an anode current collector design, a cathode current collector design, a stepped header design, a cathode formulation, an electrolyte formulation, a separator, and a battery incorporating the electrochemical cell are provided.Type: ApplicationFiled: September 21, 2021Publication date: January 6, 2022Inventors: Dong Zhang, Jason A. Mudge, David Timothy Andrew Darch, Mario Destephen, Ernest Ndzebet, Umamaheswari Janakiraman
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Patent number: 11217846Abstract: An electrochemical cell that converts chemical energy to electrical energy includes a cathode with an active material of fluorinated carbon on a perforated metal cathode current collector, a lithium anode on a perforated metal anode current collector, a stepped header, a stable electrolyte, and a separator. In various embodiments, an anode current collector design, a cathode current collector design, a stepped header design, a cathode formulation, an electrolyte formulation, a separator, and a battery incorporating the electrochemical cell are provided.Type: GrantFiled: March 16, 2018Date of Patent: January 4, 2022Assignee: EAGLEPICHER TECHNOLOGIES, LLCInventors: Dong Zhang, Jason A Mudge, David Timothy Andrew Darch, Destephen Mario, Ernest Ndzebet, Umamaheswari Janakiraman
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Publication number: 20210391616Abstract: An electrochemical cell that converts chemical energy to electrical energy includes a cathode with an active material of fluorinated carbon on a perforated metal cathode current collector, a lithium anode on a perforated metal anode current collector, a stepped header, a stable electrolyte, and a separator. In various embodiments, an anode current collector design, a cathode current collector design, a stepped header design, a cathode formulation, an electrolyte formulation, a separator, and a battery incorporating the electrochemical cell are provided.Type: ApplicationFiled: August 24, 2021Publication date: December 16, 2021Inventors: Dong Zhang, Jason A. Mudge, David Timothy Andrew Darch, Mario Destephen, Ernest Ndzebet, Umamaheswari Janakiraman
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Publication number: 20210384575Abstract: An electrochemical cell that converts chemical energy to electrical energy includes a cathode with an active material of fluorinated carbon on a perforated metal cathode current collector, a lithium anode on a perforated metal anode current collector, a stepped header, a stable electrolyte, and a separator. In various embodiments, an anode current collector design, a cathode current collector design, a stepped header design, a cathode formulation, an electrolyte formulation, a separator, and a battery incorporating the electrochemical cell are provided.Type: ApplicationFiled: August 24, 2021Publication date: December 9, 2021Inventors: Dong Zhang, Jason A. Mudge, David Timothy Andrew Darch, Mario Destephen, Ernest Ndzebet, Umamaheswari Janakiraman
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Publication number: 20210328203Abstract: The disclosure provides an electrochemical cell that may comprise a housing; a cathode connection, in the housing, that is associated with a cathode; an anode connection, in the housing, that is associated with an anode; an electrolyte; and a header assembly. The header assembly can include a cathode connection assembly; an anode connection assembly; and a stepped header body that includes (a) a first step portion having a first thickness and first step surface, (b) a second step portion having a second thickness and a second step surface, and the first thickness being thicker than the second thickness. The disclosure may also provide systems and methods of making such a cell.Type: ApplicationFiled: April 20, 2020Publication date: October 21, 2021Applicant: EaglePicher Technologies, LLCInventors: Dong Zhang, Jason A. Mudge, David Timothy Andrew Darch, Mario Destephen, Ernest Ndzebet
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Publication number: 20210328204Abstract: Batteries and methods of using and making batteries are provided. A cell can include a housing; a cathode current collector, in the housing, including a cathode tab and a cathode plate. The cathode tab can include a tab area. The cathode plate can include a plate area and a peripheral edge that surrounds at least a portion of the plate area. The peripheral edge can include a plurality of partial perforations. The plate area can include a plurality of interior perforations. The cell can further include an anode current collector, in the housing, including an anode tab; an anode, in the housing, provided adjacent the anode current collector; and a cathode, in the housing, provided adjacent to the cathode current collector.Type: ApplicationFiled: April 16, 2020Publication date: October 21, 2021Applicant: EaglePicher Technologies, LLCInventors: Dong Zhang, Jason A. Mudge, David Timothy Andrew Darch, Mario Destephen, Ernest Ndzebet, Umamaheswari Janakiraman
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Publication number: 20210167349Abstract: The disclosure provides a cell that may comprise (1) a housing; (2) an anode current collector, in the housing, including a first connection, and the anode current collector including a first plate with perforations and a second plate with perforations, the anode current collector further including a tab that connects the first plate and the second plate; (3) a cathode current collector, in the housing, including a second connection; (4) a first anode, in the housing, provided between the cathode current collector and the first plate; (5) a second anode, in the housing, provided between the cathode current collector and the second plate; and (6) a cathode, in the housing, provided adjacent to the cathode current collector. The disclosure may also provide systems and methods of making such a cell.Type: ApplicationFiled: December 3, 2019Publication date: June 3, 2021Applicant: EaglePicher Technologies, LLCInventors: Dong Zhang, Jason A. Mudge, David Timothy Andrew Darch, Mario Destephen, Ernest Ndzebet, Umamaheswari Janakiraman
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Publication number: 20210043888Abstract: An electrochemical cell that converts chemical energy to electrical energy includes a cathode with an active material of fluorinated carbon on a perforated metal cathode current collector, a lithium anode on a perforated metal anode current collector, a stepped header, a stable electrolyte, and a separator. In various embodiments, an anode current collector design, a cathode current collector design, a stepped header design, a cathode formulation, an electrolyte formulation, a separator, and a battery incorporating the electrochemical cell are provided.Type: ApplicationFiled: October 23, 2020Publication date: February 11, 2021Inventors: Dong Zhang, Jason A. Mudge, David Timothy Andrew Darch, Mario Destephen, Ernest Ndzebet, Umamaheswari Janakiraman
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Patent number: 10355306Abstract: A cathode material suitable for use in non-aqueous electrochemical cells that includes copper manganese vanadium oxide and, optionally, fluorinated carbon. A non-aqueous electrochemical cell comprising such a cathode material, and a non-aqueous electrochemical cell that additionally includes a lithium anode.Type: GrantFiled: August 29, 2012Date of Patent: July 16, 2019Assignee: EaglePicher Technologies, LLCInventors: Ernest Ndzebet, Joshua Dean, Mario Destephen, Umamaheswari Janakiraman, Gregory Miller, Min Qi Yang
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Publication number: 20180269437Abstract: An electrochemical cell that converts chemical energy to electrical energy includes a cathode with an active material of fluorinated carbon on a perforated metal cathode current collector, a lithium anode on a perforated metal anode current collector, a stepped header, a stable electrolyte, and a separator. In various embodiments, an anode current collector design, a cathode current collector design, a stepped header design, a cathode formulation, an electrolyte formulation, a separator, and a battery incorporating the electrochemical cell are provided.Type: ApplicationFiled: March 16, 2018Publication date: September 20, 2018Applicant: EaglePicher Technologies, LLCInventors: Dong Zhang, Jason A Mudge, David Timothy Andrew Darch, Destephen Mario, Ernest Ndzebet, Umamaheswari Janakiraman
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Patent number: 9991493Abstract: A non-aqueous electrochemical cell including a lithium anode, a solid cathode, a first separator and a second separator disposed between the anode and the cathode, and an electrolyte in fluid communication with the anode, the cathode, and the first and the second separators, the first separator having a higher melting point (or shut-down) temperature than the melting point (or shut-down) temperature of the second separator.Type: GrantFiled: October 15, 2013Date of Patent: June 5, 2018Assignee: EAGLEPICHER TECHNOLOGIES, LLCInventors: Umamaheswari Janakiraman, Ernest Ndzebet, Mario Destephen, Greg Miller, Joe Edington, Ramanathan Thillaiyan
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Publication number: 20160359158Abstract: A non-aqueous electrochemical cell including a lithium anode, a solid cathode, a first separator and a second separator disposed between the anode and the cathode, and an electrolyte in fluid communication with the anode, the cathode, and the first and the second separators, the first separator having a higher melting point (or shut-down) temperature than the melting point (or shut-down) temperature of the second separator.Type: ApplicationFiled: October 15, 2013Publication date: December 8, 2016Applicant: EAGLEPICHER TECHNOLOGIES, LLCInventors: Umamaheswari JANAKIRAMAN, Ernest NDZEBET, Mario DESTEPHEN, Greg MILLER, Joe EDINGTON, Ramanathan THILLAIYAN
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Patent number: 9455447Abstract: An improved lithium-sulfur battery containing a surface-functionalized carbonaceous material. The presence of the surface-functionalized carbonaceous material generates weak chemical bonds between the functional groups of the surface-functionalized carbonaceous material and the functional groups of the polysulfides, which prevents the polysulfide migration to the battery anode, thereby providing a battery with relatively high energy density and good partial discharge efficiency.Type: GrantFiled: September 26, 2013Date of Patent: September 27, 2016Assignee: EAGLEPICHER TECHNOLOGIES, LLCInventors: Ramanathan Thillaiyan, Wujun Fu, Mario Destephen, Greg Miller, Ernest Ndzebet, Umamaheswari Janakiraman
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Patent number: 9023518Abstract: A battery includes an anode containing a lithium material, a cathode containing sulfur and a porous conducting medium, and an electrolyte, wherein the electrolyte contains an additive selected from the group consisting of an organic surfactant additive, an inorganic additive, and a mixture thereof. The organic surfactant additive may be a fluorosurfactant.Type: GrantFiled: September 14, 2012Date of Patent: May 5, 2015Assignee: Eaglepicher Technologies, LLCInventors: Umamaheswari Janakiraman, Ernest Ndzebet, Thillaiyan Ramanathan, Diana Marmorstein, Mario Destephen, Gregory Miller
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Publication number: 20150084604Abstract: An improved lithium-sulfur battery containing a surface-functionalized carbonaceous material. The presence of the surface-functionalized carbonaceous material generates weak chemical bonds between the functional groups of the surface-functionalized carbonaceous material and the functional groups of the polysulfides, which prevents the polysulfide migration to the battery anode, thereby providing a battery with relatively high energy density and good partial discharge efficiency.Type: ApplicationFiled: September 26, 2013Publication date: March 26, 2015Applicant: EAGLEPICHER TECHNOLOGIES, LLCInventors: Ramanathan THILLAIYAN, Wujun FU, Mario DESTEPHEN, Greg MILLER, Ernest NDZEBET, Umamaheswari JANAKIRAMAN
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Patent number: 8691439Abstract: Alkaline electrochemical cells having extended service life and acceptable gassing and corrosion properties are disclosed. An amphoteric surfactant can be incorporated into the gelled anode mixture of an alkaline electrochemical cell, optionally with an organic phosphate ester surfactant or a sulfonic acid type organic surfactant or both. Zinc particles having a defined distribution of particle sizes can also be incorporated into a zinc anode. The electrolyte included, in the anode mixture can have a reduced hydroxide concentration.Type: GrantFiled: May 26, 2010Date of Patent: April 8, 2014Assignee: Spectrum Brands, Inc.Inventors: Ernest Ndzebet, Mario Destephen, William C Bushong, M. Edgar Armacanqui, Andrew J Roszkowski, Viet H Vu
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Publication number: 20140079989Abstract: A battery includes an anode containing a lithium material, a cathode containing sulfur and a porous conducting medium, and an electrolyte, wherein the electrolyte contains an additive selected from the group consisting of an organic surfactant additive, an inorganic additive, and a mixture thereof.Type: ApplicationFiled: September 14, 2012Publication date: March 20, 2014Applicant: EAGLEPICHER TECHNOLOGIES, LLCInventors: Umamaheswari JANAKIRAMAN, Ernest NDZEBET, Thillaiyan RAMANATHAN, Diana MARMORSTEIN, Mario DESTEPHEN, Gregory MILLER
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Patent number: 8669007Abstract: The present disclosure relates generally to a high capacity cathode material suitable for use in a non-aqueous electrochemical cell that comprises copper manganese oxide, which may be in amorphous or semi-crystalline form, and optionally fluorinated carbon. The present disclosure additionally relates to a non-aqueous electrochemical cell comprising such a cathode material and, in particular, to such a non-aqueous electrochemical cell that can deliver a higher capacity than conventional cell.Type: GrantFiled: November 9, 2009Date of Patent: March 11, 2014Assignee: Eaglepicher Technologies, LLC.Inventors: Jeremy Chi-Han Chang, Ernest Ndzebet, Viet Vu, Min Qi Yang, Umamaheswari Janakiraman, Ramanathan Thillaiyan, Dong Zhang, Mario Destephen
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Patent number: 8663825Abstract: The present disclosure relates generally to indicating an end of life condition of an electrochemical device, and more particularly to systems and methods for sensing and determining an end of life condition in a cell comprising a high capacity cathode material suitable for use in a non-aqueous electrochemical cell. The high capacity cathode material has an amorphous or semi-crystalline form of copper manganese oxide, and optionally fluorinated carbon. The present disclosure additionally relates to transmitting the determined end of life condition to a user or monitoring device of the cell.Type: GrantFiled: March 5, 2010Date of Patent: March 4, 2014Assignee: Eaglepicher Technologies, LLCInventors: Greg Miller, William Studyvin, Michael Parrot, John C. Pugsley, Ernest Ndzebet, Min Qi Yang, Viet Vu, Umamaheswari Janakiraman, Jeremy Chi-Han Chang, Ramanathan Thillaiyan, Dong Zhang, Mario Destephen