公开(公告)号：US11637285B2

公开(公告)日：2023-04-25

申请号：US17062358

申请日：2020-10-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mary E. Fortier ,  Bing Tan ,  Li Yang ,  Umamaheswari Viswanathan ,  Vijay P. Saharan ,  Sherman H. Zeng

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/02

Abstract: The present disclosure relates to over-lithiated positive electroactive materials for use within an electrochemical cell. For example, the electrochemical cell includes a positive electrode that includes an over-lithiated positive electroactive material that includes one of LixMn2O4 (where 1.05≤x≤1.30) and LiMn(2−x)NixO4 (where 0≤x≤0.5). The electrochemical cell can include a negative electrode that includes a silicon-containing negative electroactive material having a Columbic Efficiency greater than or equal to about 80% and less than or equal to about 90%.

公开(公告)号：US20230339776A1

公开(公告)日：2023-10-26

申请号：US17728342

申请日：2022-04-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Nader Marandian Hagh ,  Li Yang ,  Vijay P. Saharan ,  Laurie Jegaden ,  David Kelly

IPC: C01G53/00 ,  H01M10/0525

CPC classification number: C01G53/50 ,  H01M10/0525 ,  C01P2006/80

Abstract: A method of forming an LMNO cathode with electrolytic manganese dioxide includes dissolving metallic manganese in acid to create a dissolved manganese solution, disposing the solution within an electrolytic cell including an electrolytic cell anode and an electrolytic cell cathode, and applying a current between the cell anode and the cell cathode to the solution. Applying the current forms an MnO2 deposit upon the cell anode. The method further includes harvesting the deposit, creating a manganese precursor by neutralizing the deposit and grinding the deposit to form an MnO2 powder, and mixing the manganese precursor with a nickel precursor and a lithium precursor to create a mixture. The method further includes calcining the mixture to create an LMNO powder and coating a current collector with the LMNO powder to thereby form the LMNO cathode. The method may include testing the cathode electrode in an electrochemical pouch format cell.

公开(公告)号：US09535132B2

公开(公告)日：2017-01-03

申请号：US14220675

申请日：2014-03-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Sudhakar Inguva ,  Vijay P. Saharan ,  Mark W. Verbrugge

IPC: G01R31/36 ,  G01R21/00 ,  B60L3/00 ,  B60L11/18

CPC classification number: G01R31/3679 ,  B60L3/0046 ,  B60L11/1857 ,  B60L11/1861 ,  B60L11/1866 ,  B60L2240/545 ,  B60L2240/547 ,  B60L2240/549 ,  B60L2240/80 ,  B60L2260/44 ,  G01R31/3648 ,  G01R31/3651 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/7061

Abstract: System and methods for determining performance degradation of a battery system are presented. In certain embodiments, the disclosed systems and methods may involve testing, monitoring, and/or modeling of battery system cyclic performance degradation at a single battery system operating temperature. The disclosed systems and methods may offer certain efficiencies over conventional techniques for determining cyclic degradation of a battery system. Such efficiencies may allow the disclosed systems and methods to be implemented in connection with real-time battery state estimation methods.

Abstract translation: 介绍了确定电池系统性能下降的系统和方法。 在某些实施例中，所公开的系统和方法可涉及在单个电池系统工作温度下对电池系统循环性能退化的测试，监测和/或建模。 所公开的系统和方法可以比用于确定电池系统的循环降级的常规技术提供一定的效率。 这样的效率可以允许所公开的系统和方法结合实时电池状态估计方法来实现。

公开(公告)号：US20230187654A1

公开(公告)日：2023-06-15

申请号：US17548848

申请日：2021-12-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Teresa J. Rinker ,  Erik D. Huemiller ,  Vijay P. Saharan ,  Jesse M. Roy ,  Thomas J. Chapaton ,  Jeffrey A. Abell

IPC: H01M4/66

CPC classification number: H01M4/667 ,  H01M4/662

Abstract: The concepts described herein provide a hybrid metal/polymer current collector for a battery cell electrode that includes a collector body joined to a tab portion and encased in an electrically conductive overlay, and an associated method of manufacture. The tab portion is fabricated from a homogeneous electrically conductive material, the collector body is fabricated from a polymer, and the collector body is joined to the tab portion at a junction.

公开(公告)号：US10677849B2

公开(公告)日：2020-06-09

申请号：US15846774

申请日：2017-12-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John M. Moote ,  Vijay P. Saharan ,  Patrick M. Hanley ,  Edgar P. Calderon

IPC: G01R31/36 ,  H01M10/42 ,  G01N27/02 ,  G01N27/20 ,  G01R31/374 ,  G01R31/385

Abstract: An electrochemical cell comprises an electrolyte capable of facilitating ion transfer between an anode and a cathode. A method for identifying and/or characterizing a soft short in an electrochemical cell comprises cooling the electrochemical cell to an observation temperature at which inter-electrolyte ion migration is substantially inhibited, observing the open circuit voltage (OCV) of the electrochemical cell at the observation temperature for a period of time, and determining the presence of a soft short in the electrochemical cell if the OCV reaches a minimum threshold voltage prior to the expiration of the period of time. The method can optionally further include generating an impedance spectrum for the cell via potentiostatic electrochemical impedance spectroscopy (PETS) at or below the observation temperature, and defining the cell leakage resistance as the maximum impedance limit of the impedance spectrum. The observation temperature can comprise the glass transition temperature of the electrolyte.

公开(公告)号：US20190187216A1

公开(公告)日：2019-06-20

申请号：US15846774

申请日：2017-12-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John M. Moote ,  Vijay P. Saharan ,  Patrick M. Hanley ,  Edgar P. Calderon

IPC: G01R31/36 ,  H01M10/42 ,  G01N27/02 ,  G01N27/20

Abstract: An electrochemical cell comprises an electrolyte capable of facilitating ion transfer between an anode and a cathode. A method for identifying and/or characterizing a soft short in an electrochemical cell comprises cooling the electrochemical cell to an observation temperature at which inter-electrolyte ion migration is substantially inhibited, observing the open circuit voltage (OCV) of the electrochemical cell at the observation temperature for a period of time, and determining the presence of a soft short in the electrochemical cell if the OCV reaches a minimum threshold voltage prior to the expiration of the period of time. The method can optionally further include generating an impedance spectrum for the cell via potentiostatic electrochemical impedance spectroscopy (PETS) at or below the observation temperature, and defining the cell leakage resistance as the maximum impedance limit of the impedance spectrum. The observation temperature can comprise the glass transition temperature of the electrolyte.

公开(公告)号：US20220399574A1

公开(公告)日：2022-12-15

申请号：US17304134

申请日：2021-06-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Umamaheswari Viswanathan ,  Li Yang ,  Vijay P. Saharan ,  Mary E. Fortier

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568

Abstract: An electrolyte solution for a lithium metal battery is provided. The electrolyte solution includes lithium bis(fluorosulfonyl)imide dissolved in a fluorinated ether solvent. The electrolyte solution further includes a first additive including fluoroethylene carbonate and a second additive including lithium difluorophosphate. In one embodiment, the fluorinated ether solvent includes fluorinated 1,4 dimethoxy butane.

公开(公告)号：US11289745B2

公开(公告)日：2022-03-29

申请号：US16243517

申请日：2019-01-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. Dadheech ,  Li Yang ,  Xingcheng Xiao ,  Gongshin Qi ,  Vijay P. Saharan

IPC: H01M10/52 ,  B01J37/02 ,  B01J29/068 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/62 ,  H01M10/42

Abstract: A lithium ion battery is provided that includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. One or more of the separator, positive electrode, and negative electrode includes a transition metal compound capable of catalyzing any gaseous reactants formed in the lithium ion battery to form a liquid. The transition metal compound may include ruthenium (Ru). In certain variations, the lithium ion battery includes an electrolyte that is a conductive medium for lithium ions to move between the positive electrode and the negative electrode. The electrolyte comprises a transition metal compound capable of catalyzing a reaction of any gaseous reactants to form a liquid.

公开(公告)号：US20210408524A1

公开(公告)日：2021-12-30

申请号：US16912177

申请日：2020-06-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mary E. Fortier ,  Bing Tan ,  Li Yang ,  Uma Viswanathan ,  Vijay P. Saharan ,  Sherman H. Zeng

IPC: H01M4/136 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M4/62 ,  B60L50/60 ,  B60K1/04

Abstract: A lithium ion batteries and electric vehicles including lithium ion batteries are provided. An exemplary lithium ion battery includes a cathode including a cathode active material comprising at least 50 wt. %, based on a total weight of the cathode active material, of LiFexMn(1-x)PO4, wherein X is from 0.01 to 0.5.