公开(公告)号：US11287481B2

公开(公告)日：2022-03-29

申请号：US16432331

申请日：2019-06-05

Applicant: Xilectric, Inc.

Inventor： Steven E. Weiss ,  Charles R. Lemay ,  Andrew Ferencz

IPC: G01R31/3842 ,  G01R31/367 ,  G01R31/388 ,  H01M10/48 ,  H02J7/00

Abstract: Systems, devices, and methods of diagnosing an electrochemical cell using cyclic coulometry are discussed. An exemplary battery diagnostic system comprises a current generator to generate symmetric charge current and discharge current to excite an electrochemical cell, and a cyclic coulometer to evaluate performance of the electrochemical cell. The cyclic coulometer can adjust at least one of a charge time for applying the charge current, or a discharge time for applying the discharge current, to keep a monitored cell voltage toward a specific setpoint. The adjustment of charge or discharge time can be achieved by changing a current switch timing for reversing current from a first to a second current direction. The cyclic coulometer measures one or more electrical parameters during the charge or discharge cycle, and generates a performance metric using the measured electrical parameters.

公开(公告)号：US10705152B1

公开(公告)日：2020-07-07

申请号：US16432255

申请日：2019-06-05

Applicant: Xilectric, Inc.

Inventor： Steven E. Weiss ,  Charles R. Lemay ,  Andrew Ferencz

IPC: G01R31/378 ,  G01R31/389 ,  G01R31/3842

Abstract: Systems, devices, and methods of diagnosing an electrochemical cell using cyclic coulometry are discussed. An exemplary battery diagnostic system comprises a current generator to generate symmetric charge current and discharge current to excite an electrochemical cell, and a cyclic coulometer to evaluate performance of the electrochemical cell. The cyclic coulometer can adjust at least one of a charge time for applying the charge current, or a discharge time for applying the discharge current, to keep a monitored cell voltage toward a specific setpoint. The adjustment of charge or discharge time can be achieved by changing a current switch timing for reversing current from a first to a second current direction. The cyclic coulometer measures one or more electrical parameters during the charge or discharge cycle, and generates a performance metric using the measured electrical parameters.

公开(公告)号：US11024850B2

公开(公告)日：2021-06-01

申请号：US16140967

申请日：2018-09-25

Applicant: XILECTRIC

Inventor： Steven E. Weiss

IPC: H01M4/62 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/13 ,  H01M4/04 ,  H01M4/139 ,  H01M4/02 ,  H01M4/505

Abstract: A lithium-ion battery includes a cathode comprising a lithium compound and the cathode further includes solid additives based on metal nitrides and/or borates. The solid additives improve the capacity retention of the lithium-ion battery and extend the battery lifetime. The solid additives also reduce the growth in internal resistance of the lithium-ion battery that is known to occur as Li-ion batteries age. The solid additives help stabilize the lithium-ion chemistry to high cell potentials or temperatures.