Patents by Inventor Santhanam Raman

Santhanam Raman 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: 20230207226
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode and/or electrode includes an electrode film having a super-fibrillized binder material and carbon. The electrode film can have a reduced quantity of the binder material while maintaining desired mechanical and/or electrical properties. A process for fabricating the electrode film may include a fibrillization process using reduced speed and/or increased process pressure such that fibrillization of the binder material can be increased. The electrode film may include an electrical conductivity promoting additive to facilitate decreased equivalent series resistance performance. Increasing fibrillization of the binder material may facilitate formation of thinner electrode films, such as dry electrode films.
    Type: Application
    Filed: February 8, 2023
    Publication date: June 29, 2023
    Inventors: Santhanam RAMAN, James BORKENHAGEN, Xiaomei XI, Xiang-Rong YE
  • Patent number: 11587741
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode and/or electrode includes an electrode film having a super-fibrillized binder material and carbon. The electrode film can have a reduced quantity of the binder material while maintaining desired mechanical and/or electrical properties. A process for fabricating the electrode film may include a fibrillization process using reduced speed and/or increased process pressure such that fibrillization of the binder material can be increased. The electrode film may include an electrical conductivity promoting additive to facilitate decreased equivalent series resistance performance. Increasing fibrillization of the binder material may facilitate formation of thinner electrode films, such as dry electrode films.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: February 21, 2023
    Assignee: Tesla, Inc.
    Inventors: Santhanam Raman, James Borkenhagen, Xiaomei Xi, Xiang-Rong Ye
  • Publication number: 20210407742
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, and an electrolyte where the electrolyte includes one or more additives and/or solvent components selected from vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC). The electrolyte may include a carbonate based solvent and one or more solvent components and/or one or more of vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC).
    Type: Application
    Filed: August 13, 2021
    Publication date: December 30, 2021
    Inventors: Santhanam Raman, Xiaomei Xi, Xiang-Rong Ye, Jian Hong
  • Patent number: 11107640
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, and an electrolyte where the electrolyte includes one or more additives and/or solvent components selected from vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC). The electrolyte may include a carbonate based solvent and one or more solvent components and/or one or more of vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC).
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: August 31, 2021
    Assignee: Maxwell Technologies, Inc.
    Inventors: Santhanam Raman, Xiaomei Xi, Xiang-Rong Ye, Jian Hong
  • Publication number: 20210193398
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode and/or electrode includes an electrode film having a super-fibrillized binder material and carbon. The electrode film can have a reduced quantity of the binder material while maintaining desired mechanical and/or electrical properties. A process for fabricating the electrode film may include a fibrillization process using reduced speed and/or increased process pressure such that fibrillization of the binder material can be increased. The electrode film may include an electrical conductivity promoting additive to facilitate decreased equivalent series resistance performance. Increasing fibrillization of the binder material may facilitate formation of thinner electrode films, such as dry electrode films.
    Type: Application
    Filed: February 11, 2021
    Publication date: June 24, 2021
    Inventors: Santhanam RAMAN, James BORKENHAGEN, Xiaomei XI, Xiang-Rong YE
  • Publication number: 20210111432
    Abstract: Electrolyte additives and formulations for energy storage devices are disclosed. The electrolyte additives include aromatic nitriles, combined carbonate and sulfur-containing additives, nitrogen-containing additives, or combinations thereof.
    Type: Application
    Filed: March 21, 2019
    Publication date: April 15, 2021
    Inventors: Mohammed-Yazid Saidi, Matthew Petrowsky, Santhanam Raman, Xiaomei Xi
  • Patent number: 10923295
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode and/or electrode includes an electrode film having a super-fibrillized binder material and carbon. The electrode film can have a reduced quantity of the binder material while maintaining desired mechanical and/or electrical properties. A process for fabricating the electrode film may include a fibrillization process using reduced speed and/or increased process pressure such that fibrillization of the binder material can be increased. The electrode film may include an electrical conductivity promoting additive to facilitate decreased equivalent series resistance performance. Increasing fibrillization of the binder material may facilitate formation of thinner electrode films, such as dry electrode films.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: February 16, 2021
    Assignee: Maxwell Technologies, Inc.
    Inventors: Santhanam Raman, James Borkenhagen, Xiaomei Xi, Xiang-Rong Ye
  • Patent number: 10707027
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode comprises a first lithium ion intercalating carbon component and a second lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, and the second lithium ion intercalating component can include graphite or soft carbon. A ratio of the hard carbon to the graphite or of the hard carbon to the soft carbon can be between 1:19 to 19:1. The anode may comprise a first lithium ion intercalating carbon component, a second lithium ion intercalating carbon component and a third lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, the second lithium ion intercalating carbon component can include soft carbon, and the third lithium ion intercalating carbon component can include graphite.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: July 7, 2020
    Assignee: Maxwell Technologies, Inc.
    Inventors: Xiaomei Xi, Santhanam Raman
  • Patent number: 10665892
    Abstract: Provided is a positive electrode for a lithium ion battery, the electrode comprising a nano-crystalline layered-layered composite structure of a material having the general formula xLi2MO3(1?x)LiM?O2 in which 0<x<1, where M? is one or more ion with an average oxidation state of three and with at least one ion being Mn or Ni, and where M is one or more ions with an average oxidation state of four. Another aspect provides a positive electrode for a lithium ion battery, the electrode comprising a nano-crystalline layered-spinel composite structure of a material having the general formula xLi2MnO3. (1?x)LiMn2?yMyO4 in which 0.5<x<1.0, 0?y<1, and where M is one or more metal cations. Also provided is the positive electrode which comprises a nano-coating of inert oxide, inert phosphate or inert fluoride on the nano-crystalline composite structure.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: May 26, 2020
    Assignee: EoCell Limited
    Inventors: Santhanam Raman, Shoufen Yang, Deepak Srivastava
  • Publication number: 20190362909
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, and an electrolyte where the electrolyte includes one or more additives and/or solvent components selected from vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC). The electrolyte may include a carbonate based solvent and one or more solvent components and/or one or more of vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC).
    Type: Application
    Filed: March 29, 2019
    Publication date: November 28, 2019
    Inventors: Santhanam Raman, Xiaomei Xi, Xiang-Rong Ye, Jian Hong
  • Patent number: 10249449
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, and an electrolyte where the electrolyte includes one or more additives and/or solvent components selected from vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC). The electrolyte may include a carbonate based solvent and one or more solvent components and/or one or more of vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC).
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: April 2, 2019
    Assignee: Maxwell Technologies, Inc.
    Inventors: Santhanam Raman, Xiaomei Xi, Xiang-Rong Ye, Jian Hong
  • Publication number: 20190096593
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode comprises a first lithium ion intercalating carbon component and a second lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, and the second lithium ion intercalating component can include graphite or soft carbon. A ratio of the hard carbon to the graphite or of the hard carbon to the soft carbon can be between 1:19 to 19:1. The anode may comprise a first lithium ion intercalating carbon component, a second lithium ion intercalating carbon component and a third lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, the second lithium ion intercalating carbon component can include soft carbon, and the third lithium ion intercalating carbon component can include graphite.
    Type: Application
    Filed: November 27, 2018
    Publication date: March 28, 2019
    Inventors: XIAOMEI XI, SANTHANAM RAMAN
  • Patent number: 10153096
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode comprises a first lithium ion intercalating carbon component and a second lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, and the second lithium ion intercalating component can include graphite or soft carbon. A ratio of the hard carbon to the graphite or of the hard carbon to the soft carbon can be between 1:19 to 19:1. The anode may comprise a first lithium ion intercalating carbon component, a second lithium ion intercalating carbon component and a third lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, the second lithium ion intercalating carbon component can include soft carbon, and the third lithium ion intercalating carbon component can include graphite.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: December 11, 2018
    Assignee: Maxwell Technologies, Inc.
    Inventors: Xiaomei Xi, Santhanam Raman
  • Publication number: 20170256368
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, and an electrolyte where the electrolyte includes one or more additives and/or solvent components selected from vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC). The electrolyte may include a carbonate based solvent and one or more solvent components and/or one or more of vinylene carbonate (VC), vinyl ethylene carbonate (VEC), dimethylacetamide (DMAc), hydro fluorinated ether branched cyclic carbonate, a hydro fluorinated ether ethylene carbonate (HFEEC), hydro fluorinated ether (HFE), and fluorinated ethylene carbonate (FEC).
    Type: Application
    Filed: February 24, 2017
    Publication date: September 7, 2017
    Inventors: Santhanam Raman, Xiaomei Xi, Xiang-Rong Ye, Jian Hong
  • Publication number: 20170256367
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode and/or electrode includes an electrode film having a super-fibrillized binder material and carbon. The electrode film can have a reduced quantity of the binder material while maintaining desired mechanical and/or electrical properties. A process for fabricating the electrode film may include a fibrillization process using reduced speed and/or increased process pressure such that fibrillization of the binder material can be increased. The electrode film may include an electrical conductivity promoting additive to facilitate decreased equivalent series resistance performance. Increasing fibrillization of the binder material may facilitate formation of thinner electrode films, such as dry electrode films.
    Type: Application
    Filed: February 27, 2017
    Publication date: September 7, 2017
    Inventors: Santhanam RAMAN, James BORKENHAGEN, Xiaomei XI, Xiang-Rong YE
  • Publication number: 20170256782
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode can have a desired lithium pre-doping level to facilitate desired capacitor performance. Controlled anode pre-doping can include printing lithium powder or a mixture including lithium powder onto a surface of the anode. Controlled anode pre-doping can include electrochemically incorporating lithium ions into the anode. A duration of the pre-doping process can be selected such that desired anode pre-doping is achieved.
    Type: Application
    Filed: February 24, 2017
    Publication date: September 7, 2017
    Inventors: Santhanam RAMAN, Xiang-Rong YE, Xiaomei XI
  • Patent number: 9711297
    Abstract: A method of pre-doping an anode of an energy storage device can include immersing the anode and a dopant source in an electrolyte, and coupling a substantially constant current between the anode and the dopant source. A method of pre-doping an anode of an energy storage device can include immersing the anode and a dopant source in an electrolyte, and coupling a substantially constant voltage across the anode and the dopant source. An energy storage device can include an anode having a lithium ion pre-doping level of about 60% to about 90%.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: July 18, 2017
    Assignee: Maxwell Technologies, Inc.
    Inventors: Santhanam Raman, Xiaomei Xi, Xiang-Rong Ye
  • Publication number: 20150287546
    Abstract: An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode comprises a first lithium ion intercalating carbon component and a second lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, and the second lithium ion intercalating component can include graphite or soft carbon. A ratio of the hard carbon to the graphite or of the hard carbon to the soft carbon can be between 1:19 to 19:1. The anode may comprise a first lithium ion intercalating carbon component, a second lithium ion intercalating carbon component and a third lithium ion intercalating carbon component. The first lithium ion intercalating carbon component can include hard carbon, the second lithium ion intercalating carbon component can include soft carbon, and the third lithium ion intercalating carbon component can include graphite.
    Type: Application
    Filed: April 7, 2015
    Publication date: October 8, 2015
    Inventors: XIAOMEI XI, SANTHANAM RAMAN
  • Publication number: 20140313639
    Abstract: A method of pre-doping an anode of an energy storage device can include immersing the anode and a dopant source in an electrolyte, and coupling a substantially constant current between the anode and the dopant source. A method of pre-doping an anode of an energy storage device can include immersing the anode and a dopant source in an electrolyte, and coupling a substantially constant voltage across the anode and the dopant source. An energy storage device can include an anode having a lithium ion pre-doping level of about 60% to about 90%.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 23, 2014
    Inventors: Santhanam Raman, Xiaomei Xi, Xiang-Rong Ye
  • Publication number: 20100248033
    Abstract: Provided is a positive electrode for a lithium ion battery, the electrode comprising a nano-crystalline layered-layered composite structure of a material having the general formula xLi2MO3(1?x)LiM?O2 in which 0<x<1, where M? is one or more ion with an average oxidation state of three and with at least one ion being Mn or Ni, and where M is one or more ions with an average oxidation state of four. Another aspect provides a positive electrode for a lithium ion battery, the electrode comprising a nano-crystalline layered-spinel composite structure of a material having the general formula XLi2MnO3. (1?X)LiMn2?yMyO4 in which 0.5<x<1.0, 0?y<1, and where M is one or more metal cations. Also provided is the positive electrode which comprises a nano-coating of inert oxide, inert phosphate or inert fluoride on the nano-crystalline composite structure.
    Type: Application
    Filed: January 11, 2008
    Publication date: September 30, 2010
    Inventors: Sujeet Kumar, Santhanam Raman, Shoufen Yang, Deepak Srivastava