Patents by Inventor Sujeet Kumar

Sujeet Kumar 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).

  • Publication number: 20210135197
    Abstract: Composite silicon based materials are described that are effective active materials for lithium ion batteries. The composite materials comprise processed, e.g., high energy mechanically milled, silicon suboxide and graphitic carbon in which at least a portion of the graphitic carbon is exfoliated into graphene sheets. The composite materials have a relatively large surface area, a high specific capacity against lithium, and good cycling with lithium metal oxide cathode materials. The composite materials can be effectively formed with a two-step high energy mechanical milling process. In the first milling process, silicon suboxide can be milled to form processed silicon suboxide, which may or may not exhibit crystalline silicon x-ray diffraction. In the second milling step, the processed silicon suboxide is milled with graphitic carbon. Composite materials with a high specific capacity and good cycling can be obtained in particular with balancing of the processing conditions.
    Type: Application
    Filed: December 23, 2020
    Publication date: May 6, 2021
    Inventors: Yogesh Kumar Anguchamy, Haixia Deng, Yongbong Han, Charan Masarapu, Sujeet Kumar, Herman A. Lopez
  • Patent number: 10886526
    Abstract: Composite silicon based materials are described that are effective active materials for lithium ion batteries. The composite materials comprise processed, e.g., high energy mechanically milled, silicon suboxide and graphitic carbon in which at least a portion of the graphitic carbon is exfoliated into graphene sheets. The composite materials have a relatively large surface area, a high specific capacity against lithium, and good cycling with lithium metal oxide cathode materials. The composite materials can be effectively formed with a two step high energy mechanical milling process. In the first milling process, silicon suboxide can be milled to form processed silicon suboxide, which may or may not exhibit crystalline silicon x-ray diffraction. In the second milling step, the processed silicon suboxide is milled with graphitic carbon. Composite materials with a high specific capacity and good cycling can be obtained in particular with balancing of the processing conditions.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: January 5, 2021
    Assignee: Zenlabs Energy, Inc.
    Inventors: Yogesh Kumar Anguchamy, Haixia Deng, Yongbong Han, Charan Masarapu, Sujeet Kumar, Herman A. Lopez
  • Publication number: 20200313160
    Abstract: Improved high energy capacity designs for lithium ion batteries are described that take advantage of the properties of high specific capacity anode active compositions and high specific capacity cathode active compositions. In particular, specific electrode designs provide for achieving very high energy densities. Furthermore, the complex behavior of the active materials is used advantageously in a radical electrode balancing design that significantly reduced wasted electrode capacity in either electrode when cycling under realistic conditions of moderate to high discharge rates and/or over a reduced depth of discharge.
    Type: Application
    Filed: May 18, 2020
    Publication date: October 1, 2020
    Inventors: Charan Masarapu, Yogesh Kumar Anguchamy, Yongbong Han, Haixia Deng, Sujeet Kumar, Herman A. Lopez
  • Patent number: 10733372
    Abstract: Non-limiting examples of the present disclosure describe electronic document generation, where an electronic document of an application/service may be dynamically generated in a manner that is tailored specifically for a user. A query may be received that comprises a topic for generation of a slide-based visual presentation. The query is processed. In some examples, slide content suggestions may be generated and presented to a user based on the query processing. Content for a processed query may be retrieved by a plurality of data service providers that are connected with the visual presentation service via a distributed network. An electronic document may be generated for the slide-based visual presentation. The electronic document is specifically tailored for a user and dynamically generated based on one or more of: the processing of the query, the retrieved content, a selection of one or more slide content suggestions and an evaluation of signal data associated with the user.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: August 4, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Sujeet Kumar, Dipak Kumar Mangal, Sanjay Singh Thakur, Daniel Albert Swett, Eric Hawlen Mao
  • Patent number: 10686183
    Abstract: Improved high energy capacity designs for lithium ion batteries are described that take advantage of the properties of high specific capacity anode active compositions and high specific capacity cathode active compositions. In particular, specific electrode designs provide for achieving very high energy densities. Furthermore, the complex behavior of the active materials is used advantageously in a radical electrode balancing design that significantly reduced wasted electrode capacity in either electrode when cycling under realistic conditions of moderate to high discharge rates and/or over a reduced depth of discharge.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 16, 2020
    Assignee: Zenlabs Energy, Inc.
    Inventors: Charan Masarapu, Yogesh Kumar Anguchamy, Yongbong Han, Haixia Deng, Sujeet Kumar, Herman A. Lopez
  • Publication number: 20200161654
    Abstract: Improved high energy capacity designs for lithium ion batteries are described that take advantage of the properties of high specific capacity anode active compositions and high specific capacity cathode active compositions. In particular, specific electrode designs provide for achieving very high energy densities. Furthermore, the complex behavior of the active materials is used advantageously in a radical electrode balancing design that significantly reduced wasted electrode capacity in either electrode when cycling under realistic conditions of moderate to high discharge rates and/or over a reduced depth of discharge.
    Type: Application
    Filed: January 28, 2020
    Publication date: May 21, 2020
    Inventors: Charan Masarapu, Haixia Deng, Yongbong Han, Yogesh Kumar Anguchamy, Subramanian Venkatachalam, Sujeet A. Kumar, Herman A. Lopez
  • Patent number: 10553871
    Abstract: Improved high energy capacity designs for lithium ion batteries are described that take advantage of the properties of high specific capacity anode active compositions and high specific capacity cathode active compositions. In particular, specific electrode designs provide for achieving very high energy densities. Furthermore, the complex behavior of the active materials is used advantageously in a radical electrode balancing design that significantly reduced wasted electrode capacity in either electrode when cycling under realistic conditions of moderate to high discharge rates and/or over a reduced depth of discharge.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: February 4, 2020
    Assignee: Zenlabs Energy, Inc.
    Inventors: Charan Masarapu, Haixia Deng, Yongbong Han, Yogesh Kumar Anguchamy, Subramanian Venkatachalam, Sujeet Kumar, Herman A. Lopez
  • Publication number: 20190205264
    Abstract: A MMU may read page descriptors (using virtual addresses as an index) in a burst mode from page tables in a system memory. The page descriptors may include intermediate physical addresses (“IPAs”, in stage 1) and corresponding physical addresses (“PAs”, in stage 2). The virtual address in conjunction with page table base address register is used to index page descriptors into main memory. The MMU may identify a first group of contiguous IPAs beginning at a base IPA and a second group of contiguous IPAs beginning at an offset from the base IPA. The first and second groups may be separated by at least one IPA not contiguous with either the first or second group. The MMU may read a first PA from the page tables that corresponds to the base IPA. The MMU may store an entry in a buffer that includes the PA and a first linearity tag.
    Type: Application
    Filed: December 28, 2017
    Publication date: July 4, 2019
    Inventors: FELIX VARGHESE, ZHENBIAO MA, MARTIN JACOB, KUMAR SAKET, VASANTHA KUMAR BANDUR PUTTAPPA, SUJEET KUMAR
  • Publication number: 20190207209
    Abstract: Improved negative electrodes can comprise a silicon based active material blended with graphite to provide more stable cycling at high energy densities. In some embodiments, the negative electrodes comprise a blend of polyimide binder mixed with a more elastic polymer binder with a nanoscale carbon conductive additive. The silicon-based blended graphite negative electrodes can be matched with positive electrodes comprising nickel rich lithium nickel manganese cobalt oxides to form high energy density cells with good cycling properties.
    Type: Application
    Filed: April 9, 2018
    Publication date: July 4, 2019
    Inventors: Subramanian Venkatachalam, Sanjeev Sharma, Xianyu Iris Li, Pedro A. Hernandez-Gallegos, Charan Masarapu, Sujeet Kumar, Herman A. Lopez
  • Patent number: 10290871
    Abstract: Improved high energy capacity designs for lithium ion batteries are described that take advantage of the properties of high specific capacity anode active compositions and high specific capacity cathode active compositions. In particular, specific electrode designs provide for achieving very high energy densities. Furthermore, the complex behavior of the active materials is used advantageously in a radical electrode balancing design that significantly reduced wasted electrode capacity in either electrode when cycling under realistic conditions of moderate to high discharge rates and/or over a reduced depth of discharge.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: May 14, 2019
    Assignee: Zenlabs Energy, Inc.
    Inventors: Charan Masarapu, Haixia Deng, Yongbong Han, Yogesh Kumar Anguchamy, Subramanian Venkatachalam, Sujeet Kumar, Herman A. Lopez
  • Patent number: 10218033
    Abstract: This disclosure relates to a battery and a method for its manufacture. An example method includes forming an anode comprising silicon monoxide and a forming a cathode comprising lithium cobalt oxide. The method also includes arranging the anode, the cathode, and a separator in a layered arrangement. The method further includes winding the layered arrangement to form a wound arrangement, compressing the wound arrangement, and packing it into a pouch. The method yet further includes soaking the wound arrangement in an electrolyte for a predetermined time and at a predetermined temperature. The electrolyte includes a lithium hexafluorophosphate salt dissolved in a solvent including ethylene carbonate and diethylene carbonate in about a 1:2 volume ratio. The additive includes fluoroethylene carbonate in an 8-12% weight ratio.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: February 26, 2019
    Assignee: Google LLC
    Inventors: Ramesh C. Bhardwaj, Tai Sup Hwang, Sujeet Kumar, Bing Li, Swapnil Dalavi, Shabab Amiruddin
  • Patent number: 10193135
    Abstract: A composite coated form of lithium cobalt oxide is described that can achieve improved cycling at higher voltages. Liquid phase and combined liquid and solid phase coating processes are described to effectively form the composite coated powders. The improved cycling positive electrode materials can be effectively combined with either graphitic carbon negative electrode active materials or silicon based high capacity negative electrode active materials. Improved battery designs can achieve very high volumetric energy densities in practical battery formats and with reasonable cycling properties.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: January 29, 2019
    Assignee: Zenlabs Energy, Inc.
    Inventors: Sanjeev Sharma, Deepak Kumaar K. Karthikeyan, Charles A. Bowling, Bing Li, Pedro A. Hernández Gallegos, Subramanian Venkatachalam, Herman A. Lopez, Sujeet Kumar
  • Patent number: 10170762
    Abstract: Electrochemically active material comprising a lithium metal oxide composition approximately represented by the formula Li1+bComNinMnpO(2), where ?0.2?b?0.2, 0.2?m?0.45, 0.055?n?0.24, 0.385?p?0.72, and m+n+p is approximately 1 has been synthesized and assembled to batteries. The electrochemical performance of the batteries was evaluated. The lithium metal oxide composition in general comprises a first layered phase, a second layered phase and a spinel phase. A layered Li2MnO3 phase is at least partially activated upon charging to 4.5V. In some embodiments, the material further comprises a stabilization coating covering the lithium metal oxide composition.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: January 1, 2019
    Assignee: Zenlabs Energy, Inc.
    Inventors: Haixia Deng, Subramanian Venkatachalam, Sujeet Kumar, Herman A. Lopez
  • Patent number: 10115962
    Abstract: A positive electrode active material comprising a lithium rich metal oxide active composition coated with aluminum zinc oxide coating composition is disclosed. The aluminum zinc oxide can be represented by the formula AlxZn1?3x/2O, where x is from about 0.01 to about 0.6. In some embodiments, the material can have an average voltage that is very stable with cycling, and a specific capacity of at least about 175 mAh/g and an average voltage of at least about 3.55V discharged at a rate of C/3 from 4.6V to 2V against lithium. The material can further comprise an overcoat of metal halide over the aluminum zinc oxide coating. In some embodiments, the material can have from about 1 mole percent to about 15 mole percent aluminum zinc oxide coating and from about 0.5 mole percent to about 3 mole percent aluminum halide overcoat.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: October 30, 2018
    Assignee: ENVIA SYSTEMS, INC.
    Inventors: Charles A. Bowling, Subramanian Venkatachalam, Herman A. Lopez, Sujeet Kumar
  • Publication number: 20180269471
    Abstract: High capacity silicon based anode active materials are described for lithium ion batteries. These materials are shown to be effective in combination with high capacity lithium rich cathode active materials. Supplemental lithium is shown to improve the cycling performance and reduce irreversible capacity loss for at least certain silicon based active materials. In particular silicon based active materials can be formed in composites with electrically conductive coatings, such as pyrolytic carbon coatings or metal coatings, and composites can also be formed with other electrically conductive carbon components, such as carbon nanofibers and carbon nanoparticles. Additional alloys with silicon are explored.
    Type: Application
    Filed: May 21, 2018
    Publication date: September 20, 2018
    Inventors: Herman A. Lopez, Yogesh Kumar Anguchamy, Haxia Deng, Yongbong Han, Charan Masarapu, Subramanian Venkatachalam, Sujeet Kumar
  • Patent number: 10073938
    Abstract: Disclosed aspects relate to verifying an integrated circuit design. A set of design constraints may be received with respect to a verification process for the integrated circuit design. Based on the set of design constraints, a constraint model may be constructed. A new global constraint may be determined using the constraint model. The new global constraint may be used to process the verification process for the integrated circuit design.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: September 11, 2018
    Assignee: International Business Machines Corporation
    Inventors: Anand B. Arunagiri, Raj K. Gajavelly, Sujeet Kumar, Pradeep K. Nalla
  • Patent number: 10056644
    Abstract: Batteries with high energy and high capacity are described that have a long cycle life upon cycling at a moderate discharge rate. Specifically, the batteries may have a room temperature fifth cycle discharge specific energy of at least about 175 Wh/kg discharged at a C/3 discharge rate from 4.2V to 2.5V. Additionally, the batteries can maintain at least about 70% discharge capacity at 1000 cycles relative to the fifth cycle, with the battery being discharged from 4.2V to 2.5V at a C/2 rate from the fifth cycle through the 1000th cycle. In some embodiment, the positive electrode of the battery comprises a lithium intercalation composition with optional metal fluoride coating. Stabilizing additive maybe added to the electrolyte of the battery to further improve the battery performance. The batteries are particularly suitable for use in electric vehicles.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: August 21, 2018
    Assignee: Zenlabs Energy, Inc.
    Inventors: Sujeet Kumar, James P. Buckley, Hang Shi
  • Publication number: 20180198118
    Abstract: Supplemental lithium can be used to stabilize lithium ion batteries with lithium rich metal oxides as the positive electrode active material. Dramatic improvements in the specific capacity at long cycling have been obtained. The supplemental lithium can be provided with the negative electrode, or alternatively as a sacrificial material that is subsequently driven into the negative electrode active material. The supplemental lithium can be provided to the negative electrode active material prior to assembly of the battery using electrochemical deposition. The positive electrode active materials can comprise a layered-layered structure comprising manganese as well as nickel and/or cobalt.
    Type: Application
    Filed: February 2, 2018
    Publication date: July 12, 2018
    Inventors: Shabab Amiruddin, Subramanian Venkatachalam, Bing Li, Herman A. Lopez, Sujeet Kumar
  • Publication number: 20180196784
    Abstract: Non-limiting examples of the present disclosure describe electronic document generation, where an electronic document of an application/service may be dynamically generated in a manner that is tailored specifically for a user. A query may be received that comprises a topic for generation of a slide-based visual presentation. The query is processed. In some examples, slide content suggestions may be generated and presented to a user based on the query processing. Content for a processed query may be retrieved by a plurality of data service providers that are connected with the visual presentation service via a distributed network. An electronic document may be generated for the slide-based visual presentation. The electronic document is specifically tailored for a user and dynamically generated based on one or more of: the processing of the query, the retrieved content, a selection of one or more slide content suggestions and an evaluation of signal data associated with the user.
    Type: Application
    Filed: January 10, 2017
    Publication date: July 12, 2018
    Inventors: Sujeet Kumar, Dipak Kumar Mangal, Sanjay Singh Thakur, Daniel Albert Swett, Eric Hawlen Mao
  • Patent number: 10003068
    Abstract: High capacity silicon based anode active materials are described for lithium ion batteries. These materials are shown to be effective in combination with high capacity lithium rich cathode active materials. Supplemental lithium is shown to improve the cycling performance and reduce irreversible capacity loss for at least certain silicon based active materials. In particular silicon based active materials can be formed in composites with electrically conductive coatings, such as pyrolytic carbon coatings or metal coatings, and composites can also be formed with other electrically conductive carbon components, such as carbon nanofibers and carbon nanoparticles. Additional alloys with silicon are explored.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: June 19, 2018
    Assignee: Zenlabs Energy, Inc.
    Inventors: Herman A. Lopez, Yogesh Kumar Anguchamy, Haixia Deng, Yongbong Han, Charan Masarapu, Subramanian Venkatachalam, Sujeet Kumar