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公开(公告)号：US20230411623A1
公开(公告)日：2023-12-21
申请号：US17841113
申请日：2022-06-15
发明人： Meixian WANG , Nicole ELLISON , Xiaosong HUANG , Raghunathan K
摘要： An electrode assembly for an electrochemical cell that cycles lithium ions is provided. The electrode includes a current collector, a binder material layer disposed on or near a surface of the current collector, and an electroactive material layer disposed on or near a surface of the binder material layer that faces away from the current collector. The electroactive material layer includes a plurality of electroactive material particles having an average specific surface area greater than or equal to about 1 m2/g to less than or equal to about 30 m2/g, and average particle size greater than or equal to about 0.1 micrometer to less than or equal to about 10 micrometers.
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公开(公告)号：US11749832B2
公开(公告)日：2023-09-05
申请号：US16689748
申请日：2019-11-20
发明人： Xingcheng Xiao , Xingyi Yang , Mark W. Verbrugge , Raghunathan K , Qinglin Zhang
IPC分类号： H01M10/0525 , H01M4/485 , H01M4/525 , H01M10/058 , H01M4/13 , H01M4/139 , H01M50/105 , C01G53/00 , H01M10/0562
CPC分类号： H01M10/0525 , C01G53/50 , H01M4/13 , H01M4/139 , H01M4/485 , H01M4/525 , H01M10/058 , H01M10/0562 , H01M50/105
摘要： Lithiated electrodes, electrochemical cells including lithiated electrodes, and methods of making the same are provided. The method includes lithiating at least one electrode in an electrochemical cell by applying current across a first current collector of the at least one electrode to a second current collector of an auxiliary electrode. The electrochemical cell may be disposed within a battery packaging and the auxiliary electrode may be disposed within the battery packaging adjacent to an edge of the electrochemical cell. The at least one electrode may include a first electroactive layer disposed on or near one or more surfaces of the first current collector, and the auxiliary electrode may include a second electroactive layer disposed at or near one or more surfaces of the second current collector. The method may further include extracting the auxiliary electrode from the battery packaging and sealing the battery packaging, which includes the pre-lithiated electrochemical cell.
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公开(公告)号：US20200127292A1
公开(公告)日：2020-04-23
申请号：US16165064
申请日：2018-10-19
发明人： Ion C. Halalay , Raghunathan K
IPC分类号： H01M4/62 , H01M10/0525 , H01M2/26 , H01M4/66 , H01M4/04 , H01M4/1393 , H01M4/133
摘要： A method of forming an electrode includes attaching a tab to a collector to form a pre-tabbed current collector; disposing the pre-tabbed current collector onto a non-stick substrate to form a workpiece; and casting a slurry onto the workpiece to form a film. The slurry includes an active material component, one or more carbon additives, and at least one of a filamentary copper additive and a dendritic copper additive. The method includes drying the film at a first temperature to form a dried film; curing the dried film under pressure at a second higher temperature to form a cured film; removing the cured film from the non-stick substrate to form a precursor film; and carbonizing and annealing the precursor film at a third higher temperature. Carbonizing forms a three-dimensional electrically-conductive network and annealing forms a second contiguous network of copper connected to the active material component to form the electrode.
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公开(公告)号：US10288692B2
公开(公告)日：2019-05-14
申请号：US14739639
申请日：2015-06-15
摘要： System and methods for estimating a relationship between a SOC and an OCV of a battery system included in a vehicle are presented. In certain embodiments, an initial relationship between an open circuit voltage (“OCV”) and a state of charge (“SOC”) of a cell of the battery system may be determined at a beginning of life of the cell. Changes in one or more stoichiometric points of a half-cell of the cell may be determined as the cell ages. Based on the determined stoichiometric point changes of the half-cell, an initial relationship between the OCV and the SOC of the cell may be adjusted to generate an updated relationship between the OCV and the SOC of the cell.
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公开(公告)号：US20230361591A1
公开(公告)日：2023-11-09
申请号：US17739341
申请日：2022-05-09
发明人： Srikanth ARISETTY , Venkata Prasad ATLURI , Charles W. WAMPLER, II , Chandra S. NAMUDURI , Raghunathan K
CPC分类号： H02J7/00712 , H02J7/0013 , H02J7/0048 , H01M10/425 , H01M4/386 , H01M4/505 , H01M4/583 , H01M4/525 , H01M10/441 , H01M2010/4271
摘要： A battery pack includes: first battery modules, the first battery modules each including first battery cells having a first battery cell chemistry and not including second battery cells having a second battery cell chemistry that is different than the first battery cell chemistry; second battery modules, the second battery modules each including the second battery cells having the second battery cell chemistry and not including the first battery cells having the first battery chemistry; switches; and a switch control module configured to actuate the switches and control charging and discharging of the first and second battery modules.
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6.发明授权公开(公告)号：US11374218B2
公开(公告)日：2022-06-28
申请号：US16547084
申请日：2019-08-21
发明人： Meng Jiang , Lei Wang , Raghunathan K
IPC分类号： H01M4/38 , H01M4/62 , H01M10/0525 , H01M4/36 , H01M4/02
摘要： A negative electroactive material for use in a negative electrode of an electrochemical cell that cycles lithium ions is provided. The negative electroactive material includes a particle defining a core region that includes silicon, silicon-containing alloys, tin-containing alloys, and combinations thereof. A porous, elastomeric multilayer coating is disposed on a surface of the core region that includes a first carbonaceous layer and a second porous elastomeric layer. The second porous elastomeric layer includes siloxane and a plurality of electrically conductive particles. The multilayer coating is capable of reversibly elongating from a contracted state to an expanded state in at least one direction to minimize or prevent fracturing of the plurality of negative electroactive material particles during lithium ion cycling.
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公开(公告)号：US20210083264A1
公开(公告)日：2021-03-18
申请号：US16572789
申请日：2019-09-17
发明人： Meng Jiang , Raghunathan K , Ion C. Halalay , Mark W. Verbrugge
摘要： Methods for fabricating electrodes include coating a current collector with a slurry to form a coated current collector. The slurry includes a dry fraction, including silicon particles, polymeric binders, and one or more types of naturally occurring carbonaceous filaments, and one or more solvents. The coated current collector is heat treated to produce the electrode having a layer of silicon-based host material. The one or more naturally occurring carbonaceous filaments can include animal fibers, chitin, alginate, cellulose, keratin, and chitosan, and can have an average length of 1 μm to 50 μm and an average diameter of 1 nm to 500 nm. The dry fraction can include 5 wt. % to 95 wt. % silicon particles, 0.1 wt. % to 15 wt. % polymeric binders, and 1 wt. % to 20 wt. % naturally occurring carbonaceous filaments. The method can include assembling a battery cell by disposing the electrode and a positive electrode in electrolyte.
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公开(公告)号：US10854882B2
公开(公告)日：2020-12-01
申请号：US16165064
申请日：2018-10-19
发明人： Ion C. Halalay , Raghunathan K
IPC分类号： H01M4/62 , H01M10/0525 , H01M2/26 , H01M4/04 , H01M4/66 , H01M4/1393 , H01M4/133 , H01M4/02
摘要： A method of forming an electrode includes attaching a tab to a collector to form a pre-tabbed current collector; disposing the pre-tabbed current collector onto a non-stick substrate to form a workpiece; and casting a slurry onto the workpiece to form a film. The slurry includes an active material component, one or more carbon additives, and at least one of a filamentary copper additive and a dendritic copper additive. The method includes drying the film at a first temperature to form a dried film; curing the dried film under pressure at a second higher temperature to form a cured film; removing the cured film from the non-stick substrate to form a precursor film; and carbonizing and annealing the precursor film at a third higher temperature. Carbonizing forms a three-dimensional electrically-conductive network and annealing forms a second contiguous network of copper connected to the active material component to form the electrode.
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公开(公告)号：US20190308630A1
公开(公告)日：2019-10-10
申请号：US15949827
申请日：2018-04-10
摘要： A discharge module is configured to determine a change in capacity of the battery between: (i) a measurement of a first open circuit voltage (OCV) of a battery of a vehicle; and (ii) a measurement of a second OCV of the battery. A lookup table is stored in memory and includes reference states of charge (SOCs) indexed by reference OCVs and reference capacities. A relationship module is configured to: from the lookup table, identify a first set of the reference SOCs associated with the first OCV and the reference capacities, respectively; from the lookup table, identify a second set of the reference SOCs associated with the second OCV and the reference capacities, respectively; determine changes in SOC associated with the reference capacities; determine changes in capacity; and determine an equation that relates changes in capacity to capacity based on the changes in capacity and the reference capacities, respectively.
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公开(公告)号：US20180205114A1
公开(公告)日：2018-07-19
申请号：US15406423
申请日：2017-01-13
发明人： Allen D. Pauric , Meng Jiang , Gillian R. Goward , Raghunathan K
IPC分类号： H01M10/0525 , H01M4/134 , H01M4/131 , H01M4/38 , H01M4/52 , H01M4/48 , H01M4/62 , H01M4/80 , H01M4/66 , H01M4/04
CPC分类号： H01M10/0525 , H01M4/0404 , H01M4/131 , H01M4/134 , H01M4/1391 , H01M4/1395 , H01M4/386 , H01M4/387 , H01M4/485 , H01M4/622 , H01M4/624 , H01M4/625 , H01M4/626 , H01M4/66 , H01M4/667 , H01M4/80 , H01M2004/027
摘要： An electrode material for an electrochemical cell is provided. The electrode includes a porous hydrophilic substrate, an electroactive material, and a binder. The porous hydrophilic substrate includes a plurality of voids and may be formed from cellulose or cellulosic derivative material. The electroactive material is dispersed in at least a portion of the voids of the hydrophilic substrate. In other aspects, another electrode material for an electrochemical cell is provided. The electrode includes a porous hydrophilic substrate, an electroactive material, an electrically conductive particle, and a binder. The porous hydrophilic substrate includes a plurality of voids and may be formed from cellulose or cellulosic derivative material. The electroactive material and the electrically conductive particle are dispersed in at least a portion of the voids of the hydrophilic substrate. In still other aspects, the porous hydrophilic substrate comprises a coating that is electrically conductive.
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