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    FABRICATION PROCESS TO MAKE ELECTRODES BY ROLLING
    11.
    发明申请
    FABRICATION PROCESS TO MAKE ELECTRODES BY ROLLING 有权

    公开(公告)号：US20220173370A1

    公开(公告)日：2022-06-02

    申请号：US17539811

    申请日：2021-12-01

    Applicant: GM Global Technology Operations LLC

    Inventor： Dewen KONG ,  Xiaochao QUE ,  Meiyuan WU ,  Haijing LIU ,  Xiaosong HUANG ,  Mark W. VERBRUGGE

    IPC: H01M4/04 ,  H01M10/058 ,  H01M4/1397 ,  H01M4/30

    Abstract: A method of manufacturing an electrode for an electrochemical cell includes providing an admixture including an electroactive material, a binder, and a solvent. The method further includes rolling the admixture to form a sheet and forming a multi-layer stack from the sheet. The method further includes forming an electrode film precursor by performing a plurality of sequential rollings, each including rolling the stack through a first gap. The plurality of sequential rollings includes first and second rollings. In the first rolling, the stack is in a first orientation. In the second rolling, the stack is in a second orientation different from the first orientation. The method further includes forming an electrode film by rolling the electrode film precursor through a second gap less than or equal to the first gap. The method further includes drying the electrode film to remove at least a portion of the solvent.

    SYSTEMS AND METHODS FOR MONITORING OF A HYBRID ENERGY STORAGE DEVICE
    12.
    发明申请
    SYSTEMS AND METHODS FOR MONITORING OF A HYBRID ENERGY STORAGE DEVICE 审中-公开

    公开(公告)号：US20190061555A1

    公开(公告)日：2019-02-28

    申请号：US16110618

    申请日：2018-08-23

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Haijing LIU ,  Wentian GU ,  Zhiqiang YU

    IPC: B60L11/18 ,  H01G11/22 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/48 ,  G01R31/36 ,  B60L3/00

    Abstract: A battery and supercapacitor system of a vehicle includes a lithium ion battery (LIB) having first and second electrodes, and a supercapacitor having third and fourth electrodes. A first reference electrode is disposed between the first and second electrodes and is configured to measure a first potential at a location between the first and second electrodes. A second reference electrode is disposed between the third and fourth electrodes and is configured to measure a second potential at a location between the third and fourth electrodes. The first electrode may be connected to the third electrode, and the second electrode may be connected to the fourth electrode. The first and second reference electrodes may not be connected to any of the first, second, third, or fourth electrodes.

    HIGH POWER CATHODE ELECTRODES FOR SOLID-STATE BATTERIES
    13.
    发明申请
    HIGH POWER CATHODE ELECTRODES FOR SOLID-STATE BATTERIES 有权

    公开(公告)号：US20250149539A1

    公开(公告)日：2025-05-08

    申请号：US18521119

    申请日：2023-11-28

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Qili SU ,  Zhe LI ,  Haijing LIU

    IPC: H01M4/131 ,  H01M4/02

    Abstract: A solid-state battery cell includes A anode electrodes including an anode active material layer arranged on an anode current collector, C cathode electrodes including a cathode active material layer arranged on a cathode current collector. The cathode active material layer includes cathode active material comprising particles including an outer layer of a material selected from a group consisting of LiNbO3, Li2ZrO3, Li3PO4, and combinations thereof. A solid electrolyte has a D50 size in a range from 4 μm to 12 μm. S separators are arranged between the A anode electrodes and the C cathode electrodes, where A, C, and S are integers greater than one.

    BI-CAPACITOR DESIGN FOR FAST STATE OF CHARGE EQUALIZATION
    15.
    发明公开
    BI-CAPACITOR DESIGN FOR FAST STATE OF CHARGE EQUALIZATION 审中-公开

    公开(公告)号：US20240270121A1

    公开(公告)日：2024-08-15

    申请号：US18359411

    申请日：2023-07-26

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jingyuan LIU ,  Qili SU ,  Dave G. RICH ,  Si CHEN ,  James MORRISON ,  Dewen KONG ,  Haijing LIU

    IPC: B60L58/22 ,  B60L58/12 ,  B60L58/19

    CPC classification number: B60L58/22 ,  B60L58/12 ,  B60L58/19 ,  B60L2240/547

    Abstract: A state of charge (SOC) balancing system includes: first and second batteries; first and second capacitors; an SOC module configured to determine first and second SOCs of the first and second batteries, respectively; and a switching module configured to selectively, when the first SOC is greater than the second SOC: (i) electrically connect the first and second capacitors in parallel; (ii) electrically connect the first battery to the first and second capacitors while the first and second capacitors are electrically connected in parallel; (iii) electrically disconnect the first battery from the first and second capacitors; (iv) electrically connect the first and second capacitors in series; (v) electrically connect the second battery to the first and second capacitors while the first and second capacitors are electrically connected in series; and (vi) electrically disconnect the second battery from the first and second capacitors.

    HYBRID BATTERY HAVING IMPROVED THERMAL STABILITY AND POWER PERFORMANCE
    16.
    发明公开
    HYBRID BATTERY HAVING IMPROVED THERMAL STABILITY AND POWER PERFORMANCE 审中-公开

    公开(公告)号：US20240055593A1

    公开(公告)日：2024-02-15

    申请号：US17980179

    申请日：2022-11-03

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yong LU ,  Haijing LIU ,  Jingyuan LIU ,  Meiyuan WU ,  Dewen KONG

    IPC: H01M4/525 ,  H01M4/505 ,  H01M4/58 ,  H01M10/0525

    CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/028

    Abstract: The present disclosure provides an electrochemical device that cycles lithium ions. The electrochemical device includes at least one first cell unit and at least one second cell unit. The at least one first cell unit includes a nickel-rich positive electroactive material. The nickel-rich positive electroactive material can be represented by:


    LiM1xM2yM3zM4(1-x-y-z)O2

    where M1, M2, M3, and M4 are each a transition metal independently selected from the group consisting of: nickel, manganese, cobalt, aluminum, and combinations thereof, where 0≤x≤1, 0≤y≤1, and 0≤z≤1. The at least one second cell unit includes a phosphate-based positive electroactive material. The phosphate-based electroactive material can be selected from the group consisting of: lithium manganese iron phosphates (LiMnxFe1-xPO4, where 0≤x≤1) (LMFP), lithium vanadium oxygen phosphates (LixVOPO4, where 0≤x≤1), lithium vanadium phosphates, lithium vanadium fluorophosphates, and combinations thereof.

    FREE-STANDING, THIN ELECTROLYTE LAYERS
    17.
    发明公开
    FREE-STANDING, THIN ELECTROLYTE LAYERS 审中-公开

    公开(公告)号：US20240021865A1

    公开(公告)日：2024-01-18

    申请号：US17939527

    申请日：2022-09-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhe LI ,  Meiyuan WU ,  Qili SU ,  Yong LU ,  Haijing LIU

    IPC: H01M10/0562 ,  H01M10/0525 ,  H01M10/058

    CPC classification number: H01M10/0562 ,  H01M10/0525 ,  H01M10/058 ,  H01M2300/008

    Abstract: An electrochemical cell that includes a first electrode, a second electrode, and an electrolyte layer that is disposed between the first electrode and the second electrode is provided. The electrolyte layer includes a porous scaffold having a porosity greater than or equal to about 50 vol. % to less than or equal to about 90 vol. %, and a solution-processable solid-state electrolyte that at least partially fills the pores of the porous scaffold. The porous scaffold is defined by a plurality of fibers having an average diameter greater than or equal to about 0.01 micrometer to less than or equal to about 10 micrometers and an average length greater than or equal to about 1 micrometer to less than or equal to about 20 micrometers. The solution-processable solid-state electrolyte includes is selected from the group consisting of: sulfide-based solid-state particles, halide-based solid-state particles, hydride-based solid-state particles, and combinations thereof.

    POSITIVE ELECTROACTIVE MATERIALS FOR ALL-SOLID-STATE BATTERY
    18.
    发明公开
    POSITIVE ELECTROACTIVE MATERIALS FOR ALL-SOLID-STATE BATTERY 审中-公开

    公开(公告)号：US20240021809A1

    公开(公告)日：2024-01-18

    申请号：US18074784

    申请日：2022-12-05

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhe LI ,  Qili SU ,  Yong LU ,  Haijing LIU ,  Lianqi ZHANG ,  Yiming SUN

    IPC: H01M4/525 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0562 ,  H01M10/0525

    CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M4/62 ,  H01M10/0562 ,  H01M10/0525 ,  H01M2004/028

    Abstract: The present disclosure provides a positive electroactive material for an electrochemical cell that cycles lithium ions. The positive electroactive material includes a nickel-rich material including a plurality of solid-state particles. Each solid-state particle has a heterogeneous structure that includes a core and a shell that at least partially coats the core. The core includes a nickel-cobalt-manganese material, and the shell includes a nickel-cobalt-aluminum material. When the nickel-rich material is represented by LiNi(1-x-y-z)CoxMnyAl2O2, the nickel-cobalt-manganese material is represented by LiNi(i-x″-(y/a))Cox″Mn(y/a)O2, and the nickel-cobalt-aluminum material is represented by LiNi(i-x″-(z/b))Cox″Al(z/b)O2, where (i) 1-x-y-z>0.5, (ii) a+b=1, (iii) zx″+bx″=x, and (iv) 1-x″-(y/a)>1-x″-(z/b). In certain variations, the core and the shell define a base structure, and the heterogeneous structure further includes a buffer layer that at least partially coats the base structure.

    GEL POLYMER ELECTROLYTE FOR ELECTROCHEMICAL CELL
    20.
    发明公开
    GEL POLYMER ELECTROLYTE FOR ELECTROCHEMICAL CELL 审中-公开

    公开(公告)号：US20230268551A1

    公开(公告)日：2023-08-24

    申请号：US17738767

    申请日：2022-05-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhe LI ,  Qili SU ,  Haijing LIU

    IPC: H01M10/0565 ,  H01M10/0525

    CPC classification number: H01M10/0565 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2300/0025

    Abstract: A gel polymer electrolyte for an electrochemical cell that cycles lithium ions comprises a polymer matrix infiltrated with a liquid electrolyte solution. The polymer matrix comprises poly(vinylidene fluoride-co-hexafluoropropylene). The liquid electrolyte solution comprises a nonaqueous organic solvent, a first lithium salt in the nonaqueous organic solvent, and a second lithium salt in the nonaqueous organic solvent. The first lithium salt comprises lithium difluoro(oxalato)borate and the second lithium salt comprises lithium bis(trifluoromethanesulfonyl)imide.

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