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    BATTERY CELL ENCLOSURE WITH ANTI-GRAVITY ELECTROLYTE DISTRIBUTION
    42.
    发明公开
    BATTERY CELL ENCLOSURE WITH ANTI-GRAVITY ELECTROLYTE DISTRIBUTION 审中-公开

    公开(公告)号：US20230402687A1

    公开(公告)日：2023-12-14

    申请号：US17835344

    申请日：2022-06-08

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jing Gao ,  Brian J. Koch ,  Yanyan Zhang ,  Zhe Li ,  Daniel J. Wilson ,  Xingcheng Xiao

    IPC: H01M50/131 ,  H01M50/116

    CPC classification number: H01M50/131 ,  H01M50/116

    Abstract: A battery cell includes an anode, a cathode, a liquid electrolyte, and a battery cell case. The battery cell case is configured to house the anode, the cathode, and the liquid electrolyte and includes a case interior wall arranged proximate one of the anode and the cathode, a battery case ceiling, and a battery case floor catching and collecting the liquid electrolyte due to force of gravity. The case interior wall defines a pattern of surface tension varying between hydrophobic and hydrophilic along the case interior wall between the battery case floor and the battery cell ceiling. The pattern of surface tension thereby facilitates self-propulsion of the liquid electrolyte in opposition to the force of gravity and a predetermined distribution of the liquid electrolyte along the battery cell wall.

    BATTERY CELL MONITORING SYSTEM AND APPARATUS
    44.
    发明公开
    BATTERY CELL MONITORING SYSTEM AND APPARATUS 审中-公开

    公开(公告)号：US20230291020A1

    公开(公告)日：2023-09-14

    申请号：US17691400

    申请日：2022-03-10

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yun Cai ,  Xingcheng Xiao ,  Yeh-Hung Lai ,  Taylor R. Garrick ,  Leng Mao

    IPC: H01M10/48 ,  H01M10/0525 ,  H01M4/70

    CPC classification number: H01M10/486 ,  H01M10/0525 ,  H01M4/70

    Abstract: A battery cell monitoring system provides a direct measurement of electrical and heat distributions in a battery cell, using segmented elements that are in direct contact with an electrode of the battery. The battery cell monitoring system provides distributed local through-plane current, temperature, and pressure measurements with power for operation of the battery being supplied via battery tabs. An embodiment of a battery cell monitoring system includes a two-dimensional current collector array, a two-dimensional temperature sensor array, a plurality of pressure sensors, and a plurality of reference electrodes interspersed within the current collector array. The current collector array, the temperature sensor array, the pressure sensors, and the reference electrodes are arranged on a printed circuit board. The current collector array is configured to have direct physical contact with an electrode of the battery cell. The current collector array is disposed within a container of the battery cell.

    ELECTRODE SEPARATOR WITH PIEZOELECTRIC LAYER FOR IN-STACK PRESSURE SENSING AND DENDRITE CLEANING
    46.
    发明公开
    ELECTRODE SEPARATOR WITH PIEZOELECTRIC LAYER FOR IN-STACK PRESSURE SENSING AND DENDRITE CLEANING 审中-公开

    公开(公告)号：US20230253637A1

    公开(公告)日：2023-08-10

    申请号：US17592630

    申请日：2022-02-04

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jing Gao ,  Zhe Li ,  Xingcheng Xiao ,  Brian J. Koch ,  Michael A Lelli ,  Dave G. Rich

    IPC: H01M10/48 ,  H01L41/113 ,  H01M50/293 ,  H01L41/047

    CPC classification number: H01M10/48 ,  H01L41/0475 ,  H01L41/1132 ,  H01M50/293

    Abstract: Presented are electrochemical devices with in-stack pressure sensors, methods for making/using such devices, and battery cells with electrode stacks having an electrode separator assembly with a piezoelectric layer for in-stack pressure sensing and dendrite cleaning. An electric machine, such as a lithium-class secondary battery cell for example, includes a device housing with an ion-conducting electrolyte located inside the device housing. A stack of working electrodes is also located inside the device housing, in electrochemical contact with the electrolyte. At least one electrode separator assembly is located inside the device housing, interposed between a neighboring pair of the working electrodes. The electrode separator assembly includes a pair of separator layers that transmit therethrough the ions of the electrolyte, and a piezoelectric layer that is interposed between the two separator layers. The piezoelectric layer outputs an electrical signal in response to deformation of one or both of the neighboring working electrodes.

    Lithium alloy-based electrodes for electrochemical cells and methods for making the same
    47.
    发明授权
    Lithium alloy-based electrodes for electrochemical cells and methods for making the same 有权

    公开(公告)号：US11165052B2

    公开(公告)日：2021-11-02

    申请号：US16514633

    申请日：2019-07-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xingcheng Xiao ,  Jin Liu ,  Mei Cai ,  Meinan He ,  Hongliang Wang

    IPC: H01M4/1391 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/62 ,  H01M4/36 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/134 ,  H01M4/02

    Abstract: A negative electrode according to various aspects of the present disclosure includes a negative electroactive material and a layer. The negative electroactive material includes a lithium-aluminum alloy. The layer is disposed directly on at least a portion of the negative electroactive material and coupled to the negative electroactive material. The layer includes anodic aluminum oxide and has a plurality of pores. The present disclosure also provides an electrochemical cell including the negative electrode. In certain aspects, the negative electroactive material is electrically conductive and functions as a negative electrode current collector such that the electrochemical cell is free of a distinct negative electrode current collector component. In certain aspects, the layer is ionically conductive and electrically insulating and functions as a separator such that the electrochemical cell is free of a distinct separator component. In various aspects, the present disclosure also provides a method of making the negative electrode.

    Negative electrode for secondary lithium metal battery and method of making
    50.
    发明授权
    Negative electrode for secondary lithium metal battery and method of making 有权

    公开(公告)号：US11075371B2

    公开(公告)日：2021-07-27

    申请号：US16229149

    申请日：2018-12-21

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Binsong Li ,  Xingcheng Xiao

    IPC: H01M4/134 ,  H01M4/1395 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/02

    Abstract: A negative electrode for an electrochemical cell of a secondary lithium metal battery may comprise a metal substrate, a lithium metal layer overlying a major surface of the metal substrate, and a protective interfacial layer formed on a major surface of the lithium metal layer over the metal substrate. The protective interfacial layer may comprise a stack of monomolecular layers including at least one aryl siloxane monomolecular layer overlying the major surface of the lithium metal layer. The protective interfacial layer may be formed on the major surface of the lithium metal layer by applying a mixture of monoaryl silanes to the major surface of the lithium metal layer.

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