公开(公告)号：US11978880B2

公开(公告)日：2024-05-07

申请号：US17335972

申请日：2021-06-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jeffrey David Cain ,  Thomas E. Moylan ,  Leng Mao ,  Paul Taichiang Yu ,  Nicholas Paul William Pieczonka ,  Andrew Clay Bobel

IPC: H01M4/04 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0562

CPC classification number: H01M4/0409 ,  H01M4/0404 ,  H01M4/366 ,  H01M10/0525 ,  H01M10/0562 ,  H01M2300/0065

Abstract: A method for forming a layered anode material includes contacting a precursor material and a first electrolyte. The precursor material is a layered ionic compound represented by MX2, where M is one of calcium and magnesium and X is one of silicon, germanium, and boron. The method further includes applying a first bias and/or current as the precursor material contacts the first electrolyte to remove cations from the precursor material to create a two-dimensional structure that defines the layered anode material. In certain variations, the method further includes contacting the two-dimensional structure and a second electrolyte and applying a second bias and/or current as the two-dimensional structure contacts the second electrolyte so as to cause lithium ions to move into interlayer spaces or voids created in the two-dimensional structure by the removal of the cations thereby forming the layered anode material.

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.

公开(公告)号：US20210408517A1

公开(公告)日：2021-12-30

申请号：US16912150

申请日：2020-06-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Andrew C. Bobel ,  Anil K. Sachdev ,  Jeffrey D. Cain ,  Leng Mao

IPC: H01M4/04 ,  H01M10/0525 ,  H01M4/46 ,  H01M4/38

Abstract: A method for making a pre-lithiated electrode for a lithium ion battery cell, a method for making a battery with a pre-lithiated electrode, and an electric vehicle with a pre-lithiated electrode are provided. An exemplary method for making a pre-lithiated electrode for a lithium ion battery cell includes electrochemically connecting a magnesium-lithium alloy to the electrode. Further, the method includes pre-lithiating the electrode by transferring lithium ions from the magnesium-lithium alloy to the electrode. Also, the method includes electrochemically disconnecting the magnesium-lithium alloy from the electrode.

公开(公告)号：US12034144B2

公开(公告)日：2024-07-09

申请号：US17486378

申请日：2021-09-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Paul Taichiang Yu ,  Leng Mao ,  Jeffrey David Cain ,  Andrew Clay Bobel

IPC: H01M4/00 ,  H01M4/04 ,  H01M4/02

CPC classification number: H01M4/049 ,  H01M2004/027

Abstract: A method for forming a prelithiated, layered anode material includes contacting an ionic compound and a lithium precursor in an environment having a temperature ranging from about 200° C. to about 900° C. The ionic compound is a three-dimensional layered material represented by MX2, where M is one of calcium (Ca) and magnesium (Mg) and X is one of silicon (Si), germanium (Ge), and boron (B). The lithium precursor is selected from the group consisting of: LiH, LiC, LiOH, LiCl, and combinations thereof. The contacting of the ionic compound and the lithium precursor in the environment causes removal of cations from the ionic compound to create openings in interlayer spaces or voids in the three-dimensional layered material thereby defining a two-dimensional layered material and also causes introduction of lithium ions from the lithium precursor into the interlayer spaces or voids to form the prelithiated, layered anode material.

公开(公告)号：US20220123279A1

公开(公告)日：2022-04-21

申请号：US17071118

申请日：2020-10-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Leng Mao ,  Jeffrey D. Cain ,  Anil K. Sachdev ,  Andrew C. Bobel

IPC: H01M4/134 ,  H01M4/62 ,  H01M4/505 ,  H01M4/46

Abstract: Self-lithiating battery cells include an anode having a current collector, a host material applied to the current collector comprising graphite, silicon particles, and/or SiOx particles, wherein x is less than or equal to 2, and lithium foil in contact with the current collector. Methods for pre-lithiating battery cells include charging and discharging the battery cell to deplete the lithium foil by causing lithium ions to migrate from the lithium foil to the cathode and/or the anode. The methods can further include subsequently iteratively charging and discharging the battery while the depleted lithium foil remains within the battery cell. The lithium foil can be pure elemental lithium metal or a lithium magnesium alloy. The lithium foil can include 10 wt. % to 99 wt. % lithium and 1 wt. % to 90 wt. % magnesium. The anode current collector can include perforations.

公开(公告)号：US20180370520A1

公开(公告)日：2018-12-27

申请号：US15634749

申请日：2017-06-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Wei Liu ,  Pablo Valencia, JR. ,  Leng Mao ,  Sudhakar Inguva ,  Ryan B. Moulliet

IPC: B60W20/13 ,  B60L11/18 ,  B60W10/06 ,  B60W10/08 ,  B60W10/26

CPC classification number: B60W20/13 ,  B60L50/16 ,  B60L50/61 ,  B60L58/13 ,  B60L58/16 ,  B60L2240/36 ,  B60L2240/423 ,  B60L2240/443 ,  B60L2240/545 ,  B60L2240/547 ,  B60L2240/662 ,  B60W10/06 ,  B60W10/08 ,  B60W10/26 ,  B60W2510/244 ,  B60W2710/0666 ,  B60W2710/083 ,  Y10S903/93

Abstract: A hybrid powertrain system includes a method for managing electrical charging of a DC power source, which includes determining an initial charge-sustaining SOC setpoint and an initial charge-termination SOC setpoint. The DC power source is dynamically monitored. An adjustment to a charge-sustaining SOC setpoint is determined based upon the ambient temperature, the device temperature and the SOC of the DC power source, and an updated charge-sustaining SOC setpoint is determined based upon the adjustment to the charge-sustaining SOC setpoint and the initial charge-sustaining SOC setpoint. An electric energy equalization factor α is determined, and an updated charge termination SOC setpoint can be determined based upon the electric energy equalization factor α, the updated charge-sustaining SOC setpoint and the initial charge-sustaining SOC setpoint. Charging of the DC power source is controlled based upon the updated charge-termination SOC setpoint.

公开(公告)号：US12142751B2

公开(公告)日：2024-11-12

申请号：US16912150

申请日：2020-06-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Andrew C. Bobel ,  Anil K. Sachdev ,  Jeffrey D. Cain ,  Leng Mao

IPC: H01M4/04 ,  H01M4/38 ,  H01M4/46 ,  H01M10/0525

Abstract: A method for making a pre-lithiated electrode for a lithium ion battery cell, a method for making a battery with a pre-lithiated electrode, and an electric vehicle with a pre-lithiated electrode are provided. An exemplary method for making a pre-lithiated electrode for a lithium ion battery cell includes electrochemically connecting a magnesium-lithium alloy to the electrode. Further, the method includes pre-lithiating the electrode by transferring lithium ions from the magnesium-lithium alloy to the electrode. Also, the method includes electrochemically disconnecting the magnesium-lithium alloy from the electrode.

公开(公告)号：US11735744B2

公开(公告)日：2023-08-22

申请号：US17242576

申请日：2021-04-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anil K. Sachdev ,  Leng Mao ,  Louis G. Hector, Jr. ,  Andrew C. Bobel

IPC: H01M4/74 ,  H01M4/38 ,  H01M4/134 ,  H01M50/531 ,  H01M4/66 ,  H01M4/04 ,  H01M4/1395 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/747 ,  H01M4/0404 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/382 ,  H01M4/662 ,  H01M4/667 ,  H01M4/669 ,  H01M10/052 ,  H01M50/531 ,  H01M2004/021

Abstract: A battery electrode, and a method for fabricating the battery electrode are described. The battery electrode includes a current collector having a woven mesh planar sheet that is composed of metallic strands. The metallic strands define a multiplicity of interstitial spaces, and the woven mesh planar sheet includes a first surface and a second surface. An active material including lithium is embedded in the interstitial spaces of a first portion of the woven mesh planar sheet, and an electrical connection tab arranged on a second portion of the woven mesh planar sheet.

公开(公告)号：US20220352523A1

公开(公告)日：2022-11-03

申请号：US17242576

申请日：2021-04-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anil K. Sachdev ,  Leng Mao ,  Louis G. Hector, JR. ,  Andrew C. Bobel

IPC: H01M4/74 ,  H01M4/38 ,  H01M4/134 ,  H01M50/531 ,  H01M4/66 ,  H01M10/052 ,  H01M4/04 ,  H01M4/1395

Abstract: A battery electrode, and a method for fabricating the battery electrode are described. The battery electrode includes a current collector having a woven mesh planar sheet that is composed of metallic strands. The metallic strands define a multiplicity of interstitial spaces, and the woven mesh planar sheet includes a first surface and a second surface. An active material including lithium is embedded in the interstitial spaces of a first portion of the woven mesh planar sheet, and an electrical connection tab arranged on a second portion of the woven mesh planar sheet.

公开(公告)号：US20220352496A1

公开(公告)日：2022-11-03

申请号：US17242616

申请日：2021-04-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Leng Mao ,  Anil K. Sachdev

IPC: H01M4/134 ,  H01M4/04 ,  H01M4/1395 ,  H01M50/46 ,  H01M4/66 ,  H01M4/38 ,  H01M4/74 ,  H01M10/052 ,  H01M50/531

Abstract: A battery electrode, and a method for fabricating the battery electrode are described. The battery electrode includes a lithium foil that is arranged between a first porous current collector and a second porous current collector. The first and second porous current collectors each defines a multiplicity of interstitial spaces, and the lithium foil is embedded in the interstitial spaces defined by the first porous current collector and in the interstitial spaces defined by the second porous current collector, thus enabling two-side functionality.