公开(公告)号：US20250018830A1

公开(公告)日：2025-01-16

申请号：US18352451

申请日：2023-07-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brian J. Koch ,  Jing Gao ,  Xi Chen

IPC: B60L58/16 ,  B60L53/10 ,  G01R31/392 ,  H01M10/44 ,  H01M10/48

Abstract: A method for controlling charging of a battery to minimize or avoid lithium plating. The method may include charging the battery during with a first charge current having a first charge profile, monitoring charging of the battery with the first charge current, and thereafter charging the battery with a second charge current having a cathode charge profile to prevent a cathode potential of the battery from exceeding a cathode threshold.

公开(公告)号：US12113184B2

公开(公告)日：2024-10-08

申请号：US17752185

申请日：2022-05-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H01M10/04 ,  B05D1/00 ,  H01M10/48

CPC classification number: H01M10/48 ,  B05D1/005

Abstract: A method of making a reference electrode assembly for an electrochemical cell according to various aspects of the present disclosure includes providing a subassembly including a separator layer and a current collector layer coupled to the separator layer. The method further includes providing an electrode ink including an electroactive material, a binder, and a solvent. The method further includes creating a reference electrode precursor by applying an electroactive precursor layer to the current collector layer. The electroactive precursor layer covers greater than or equal to about 90% of a superficial surface area of a surface of the current collector layer. The electroactive precursor layer includes the electrode ink. The method further includes creating the reference electrode assembly by drying the electroactive precursor layer to remove at least a portion of the solvent, thereby forming an electroactive layer. The electroactive layer is solid and porous.

公开(公告)号：US20230282805A1

公开(公告)日：2023-09-07

申请号：US17685700

申请日：2022-03-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. Dadheech ,  Mark W. Verbrugge ,  Brian J. Koch ,  Jing Gao ,  Alok Warey

IPC: H01M4/134 ,  H01M10/48 ,  G01R31/382 ,  H01M10/0525 ,  C23C18/54 ,  H01M4/04

CPC classification number: H01M4/134 ,  C23C18/54 ,  G01R31/382 ,  H01M4/0438 ,  H01M10/0525 ,  H01M10/48

Abstract: A reference electrode assembly for an electrochemical cell includes a separator constructed from an electrically-insulating porous material. The reference electrode assembly also includes a current collector having a sputtered electrically-conducting porous layer arranged directly on the separator and a sputtered lithium iron phosphate (LFP) layer arranged directly on the electrically-conducting porous layer. The reference electrode assembly additionally includes an electrical contact connected to the current collector. A method using successive vacuum deposition of individual layers onto the separator is employed in fabricating the reference electrode assembly.

公开(公告)号：US20230253638A1

公开(公告)日：2023-08-10

申请号：US17666673

申请日：2022-02-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri Vyas Dadheech ,  Mark W. Verbrugge ,  Brian J. Koch ,  Jing Gao ,  Alok Warey

IPC: H01M10/48 ,  H01M10/42 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M10/48 ,  H01M10/4285 ,  H01M10/0525 ,  H01M4/62 ,  H01M2220/20

Abstract: A system for detecting a lithium dendrite in a battery cell is provided. The system includes the battery cell including an anode and a cathode. The battery cell further includes a conductive prewarning layer disposed between the anode and the cathode and constructed with a porous material. The battery cell further includes a separator layer disposed between the conductive prewarning layer and the cathode, wherein the separator layer is configured for allowing ions to pass through the separator layer. The system further includes a sensor electrically connected to the anode and the conductive prewarning layer and monitoring data related to a voltage potential between the anode and the conductive prewarning layer. The data is useful to identify a decrease in the voltage potential between the anode and the conductive prewarning layer and diagnose existence of the lithium dendrite.

公开(公告)号：US11592493B2

公开(公告)日：2023-02-28

申请号：US16743848

申请日：2020-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alfred Zhang ,  Justin Bunnell ,  Garrett M. Seeman ,  Jeffrey S. Piasecki ,  Charles W. Wampler ,  Brian J. Koch ,  Jing Gao ,  Jeffrey A. Bednar ,  Xiumei Guo ,  Justin R. McDade

IPC: G01R31/30 ,  G01R31/3832 ,  G01R31/3842 ,  H01M10/48 ,  H01M10/42 ,  G01R31/388

Abstract: A method for battery capacity estimation is provided. The method includes monitoring a sensor, collecting a plurality of data points including a voltage-based state of charge value and an integrated current value, defining within the data points a first data set collected during a first time period and a second data set collected during a second time period, determining an integrated current error related to the second data set, comparing the integrated current error related to the second data set to a threshold integrated current error. When the error related to the second data set exceeds the threshold, the method further includes resetting the second data set based upon an integrated current value from the first time period. The method further includes combining the data sets to create a combined data set and determining a voltage slope capacity estimate as a change in integrated current versus voltage-based state of charge.

公开(公告)号：US20220407126A1

公开(公告)日：2022-12-22

申请号：US17353027

申请日：2021-06-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jing Gao ,  Xingcheng Xiao ,  Brian J. Koch

IPC: H01M10/44 ,  H01M10/48 ,  H01M10/0525

Abstract: A method of reforming a negative electrode layer of a secondary lithium battery may include execution of a reforming cycle that reforms a major facing surface of the negative electrode layer by eliminating at least a portion of a lithium dendrite or other lithium-containing surface irregularity that has formed on the major facing surface of the negative electrode layer.

公开(公告)号：US11245105B2

公开(公告)日：2022-02-08

申请号：US16577921

申请日：2019-09-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H01M50/403 ,  H01M10/48 ,  C23C14/35 ,  C23C14/34 ,  C23C14/20 ,  C23C14/14 ,  G01R19/00 ,  G01R31/364 ,  H01M4/04 ,  H01M4/52 ,  H01M10/0525 ,  H01M4/66 ,  C23C14/00 ,  H01M4/134 ,  H01J37/34

Abstract: A method of manufacturing a component for a reference electrode assembly according to various aspects of the present disclosure includes providing a separator having first and second opposing surfaces. The method further includes sputtering a first current collector layer to the first surface via magnetron or ion beam sputtering deposition. A porosity of the separator is substantially unchanged by the sputtering. In one aspect, the method further includes sputtering a second current collector layer to the second surface via magnetron or ion beam sputtering deposition. In one aspect, the first current collector layer includes nickel and defines a first thickness of greater than or equal to about 200 nm to less than or equal to about 300 nm and the second current collector layer includes gold and defines a second thickness of greater than or equal to about 25 nm to less than or equal to about 100 nm.