公开(公告)号：US20250096438A1

公开(公告)日：2025-03-20

申请号：US18469786

申请日：2023-09-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anne Zhang ,  Jing Gao ,  Christine Labaza ,  Yifan Zhao ,  Brian J. Koch ,  Raneen Taha

IPC: H01M50/569 ,  B60L50/60 ,  H01M50/449 ,  H01M50/463 ,  H01M50/528

Abstract: Some embodiments disclosed herein are directed to connectors for thin-film functional separators in battery cells. In accordance with an exemplary embodiment, a thin-film functional separator for a battery cell is provided. The thin-film functional separator may be disposed within the battery cell, such as between a cathode and anode of the battery cell. The thin-film functional separator includes a porous composite membrane that includes a microporous substrate and a coating layer, and includes a lead extending from the porous composite membrane. The lead extending from the porous composite membrane is coupled to an external conductive tab using a mechanical connector that electrically couples the external conductive tab to the lead extending from the porous composite membrane. Other embodiments may be disclosed or claimed.

公开(公告)号：US12148897B2

公开(公告)日：2024-11-19

申请号：US17160553

申请日：2021-01-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jing Gao ,  Brian J. Koch ,  Gayatri V. Dadheech ,  Mark W. Verbrugge ,  Alok Warey ,  James R. Salvador ,  Robert D. Schmidt

IPC: H01M10/48 ,  G01R31/389 ,  G01R31/392 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/42

Abstract: A monitoring assembly for an electrochemical cell of a secondary lithium battery includes a porous sensory structure and a transducer. The porous sensory structure includes a sensory layer disposed on a major surface of a porous separator and a buffer layer disposed between the sensory layer and a facing surface of a negative electrode layer. The buffer layer electrically isolates the sensory layer from the facing surface of the negative electrode layer. The sensory layer includes an electrically conductive material and is configured to produce a response to an input signal or to a physical stimulus received within the electrochemical cell. The transducer is configured to process the response produced by the sensory layer to generate an output signal indicative of a diagnostic condition within the electrochemical cell.

公开(公告)号：US20240072565A1

公开(公告)日：2024-02-29

申请号：US17894691

申请日：2022-08-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Han Zhang ,  Taylor R. Garrick ,  Brian J. Koch

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/48

CPC classification number: H02J7/007194 ,  H01M10/443 ,  H01M10/486 ,  H01M2220/20

Abstract: A battery charging system includes a charger that is dynamically controlled during charging, including during rapid charging events that include elevated voltage and/or elevated current levels. The charger is connectable to a battery cell of a rechargeable energy storage system. Operation includes transferring electric power having a charging current at a maximum charging rate to the battery cell. An anode potential offset setpoint is determined. A predicted anode potential offset is determined at an interface between the anode and the separator based upon the cell voltage for the battery cell. The charger is controlled to transfer the electric power to the battery cell based upon a temperature distribution in the battery cell and a difference between the anode potential offset setpoint and the predicted anode potential offset.

公开(公告)号：US20240061023A1

公开(公告)日：2024-02-22

申请号：US17891120

申请日：2022-08-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jing Gao ,  Brian J. Koch ,  Taylor R. Garrick ,  Wei Zeng

IPC: G01R19/00 ,  H04N5/33

CPC classification number: G01R19/0046 ,  H04N5/33

Abstract: A system for in-situ mapping of electrode potential and thermal distribution is provided. The system includes a test device. The test device includes an anode, a cathode, a reference electrode, a separator disposed between the anode and the cathode, and a voltage potential sensor configured for monitoring a voltage potential at a first position upon one of the anode or the cathode as compared to a voltage potential of the reference electrode. The system further includes an infrared sensor device configured for collecting data describing temperature variation across a surface of one of the anode or the cathode.

公开(公告)号：US11813958B2

公开(公告)日：2023-11-14

申请号：US17478292

申请日：2021-09-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brian J. Koch ,  Jing Gao ,  Alfred Zhang ,  Alok Warey ,  Jason Graetz ,  Chia-Ming Chang ,  Daniel M. Zehnder ,  Patrick J. Webb ,  Souren Soukiazian

IPC: B60L58/12 ,  G01R19/165

CPC classification number: B60L58/12 ,  G01R19/16566 ,  B60L2240/547

Abstract: A vehicle, and a balancing device and method of controlling a state of charge of a reference electrode in a battery. The balancing device includes a measurement circuit and a charging circuit. The measurement circuit is configured to obtain a measurement of a reference voltage of the reference electrode. The charging circuit is configured to adjust the reference voltage based on the measurement. The state of charge of the reference electrode is controlled based on the reference voltage.

公开(公告)号：US11525742B2

公开(公告)日：2022-12-13

申请号：US16788848

申请日：2020-02-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alfred Zhang ,  Gayatri V. Dadheech ,  Jing Gao ,  Brian J. Koch

IPC: H01M4/66 ,  H01M10/48 ,  G01K7/22 ,  G01K13/00 ,  H01M4/02

Abstract: A temperature sensor for a battery cell of a rechargeable battery is described, and includes a resistive sensing element, a first electrode, and a second electrode. The resistive sensing element, the first electrode, and the second electrode are affixed to a porous separator. The porous separator is interposed between an anode and a cathode of the battery cell. The resistive sensing element is electrically connected in series between the first electrode and the second electrode, and the resistive sensing element, the first electrode and the second electrode are affixed onto the separator as film layers, and are porous.

公开(公告)号：US20220238932A1

公开(公告)日：2022-07-28

申请号：US17160553

申请日：2021-01-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jing Gao ,  Brian J. Koch ,  Gayatri V. Dadheech ,  Mark W. Verbrugge ,  Alok Warey ,  James R. Salvador ,  Robert D. Schmidt

IPC: H01M10/48 ,  H01M10/0525 ,  H01M10/42

Abstract: A monitoring assembly for an electrochemical cell of a secondary lithium battery includes a porous sensory structure and a transducer. The porous sensory structure includes a sensory layer disposed on a major surface of a porous separator and a buffer layer disposed between the sensory layer and a facing surface of a negative electrode layer. The buffer layer electrically isolates the sensory layer from the facing surface of the negative electrode layer. The sensory layer includes an electrically conductive material and is configured to produce a response to an input signal or to a physical stimulus received within the electrochemical cell. The transducer is configured to process the response produced by the sensory layer to generate an output signal indicative of a diagnostic condition within the electrochemical cell.

公开(公告)号：US20200180466A1

公开(公告)日：2020-06-11

申请号：US16214813

申请日：2018-12-10

Applicant: GM Global Technology Operations LLC

Inventor： Azeem Sarwar ,  Xiangxing Lu ,  Ciro Spigno ,  Ryan B. Moulliet ,  Jeffrey S. Piasecki ,  Andrew J. Cornelli ,  Charles W. Wampler, II ,  Brian J. Koch ,  Margaux LeBlanc ,  Gus Hatoum

IPC: B60L58/10 ,  G01R31/396 ,  G01R31/382 ,  H01M10/48 ,  G01R31/36

Abstract: System and method of controlling operation of a device having a rechargeable energy storage pack with a plurality of cells, based on propulsion loss assessment. A controller is configured to obtain a state of charge data and an open circuit voltage of the rechargeable energy storage pack. The controller is configured to obtain a state of charge disparity factor (dSOC) from a selected dataset. The state of charge disparity factor (dSOC) is defined as a difference between a minimum value of the state of charge and an average value of the state of charge of the plurality of cells. The controller is configured to control operation of the device based in part on the state of charge disparity factor (dSOC) and a plurality of parameters (Pi), including raising one or more of a plurality of flags each transmitting respective information to a user.

公开(公告)号：US20190237822A1

公开(公告)日：2019-08-01

申请号：US15885318

申请日：2018-01-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Kevin B. Rober ,  Brian J. Koch ,  Robert S. Conell

IPC: H01M10/42 ,  H01M10/0525 ,  G01N27/30 ,  G01R31/36

Abstract: A device for performing electrochemical analysis of electrochemical cells includes a housing, upper and lower stack holders, and first, second, and third current collectors. The housing includes an inner chamber that can be hermetically sealed and a central axis extending through the inner chamber. The upper and lower stack holders are disposed within the inner chamber and cooperate to define an electrode stack chamber for housing a negative electrode, a positive electrode, and a center-mounted reference electrode. The first, second, and third current collectors are at least partially disposed in the inner chamber. The first current collector can be electrically connected to a first side of the negative electrode and an external circuit. The second current collector can be in electrical contact with the positive electrode and the external circuit. The third cylindrical body can be in electrical contact with the center-mounted reference electrode and the external circuit.

公开(公告)号：US20180316195A1

公开(公告)日：2018-11-01

申请号：US15581296

申请日：2017-04-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mark W. Verbrugge ,  Brian J. Koch ,  Daniel R. Baker

IPC: H02J7/00 ,  H01M10/0525 ,  H01M10/44 ,  H01M4/505 ,  H01M4/587 ,  H01M4/525

Abstract: During the charging of lithium-ion batteries, comprising graphite anode particles, the goal is to intercalate lithium into the anode materials as LiC6. But it is possible to conduct the charging process at a rate that lithium is undesirably plated, undetected, as lithium metal on the particles of graphite. During an open-circuit period of battery operation, immediately following such a charging period, the presence of lithium plating can be detected, using a computer-based monitoring system, by continually measuring the cell potential (Vcell) over a brief period of open-circuit time and then determining dVcell/dt (mV/s) over a like period of time. It is found that the presence of a discontinuity in the derivative curve (a local maximum) reliably correlates with plated lithium on the graphite particles of the anode.