公开(公告)号：US11088402B2

公开(公告)日：2021-08-10

申请号：US16714902

申请日：2019-12-16

Applicant: Storedot Ltd.

Inventor： Leonid Krasovitsky ,  Vladimir Seleznyov ,  Daniel Aronov ,  Assaf Grunwald

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/0525

Abstract: Methods, systems and battery modules are provided, which increase the cycling lifetime of fast charging lithium ion batteries. During the formation process, the charging currents are adjusted to optimize the cell formation, possibly according to the characteristics of the formation process itself, and discharge extents are partial and optimized as well, as is the overall structure of the formation process. During operation, voltage ranges are initially set to be narrow, and are broadened upon battery deterioration to maximize the overall lifetime. Current adjustments are applied in operation as well, with respect to the deteriorating capacity of the battery. Various formation and operation strategies are disclosed, as basis for specific optimizations.

公开(公告)号：US11152602B2

公开(公告)日：2021-10-19

申请号：US16689261

申请日：2019-11-20

Applicant: StoreDot Ltd.

Inventor： Assaf Grunwald ,  Leonid Krasovitsky ,  Dmitry Voyevodin

IPC: H02J7/00 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/38 ,  H01M10/44 ,  H01M10/48 ,  H01M4/02

Abstract: Methods and systems are provided for estimating and extending the expected cell cycling lifetime for produced lithium ion cells. Methods comprise monitoring charging and/or discharging peak(s) during formation cycles of the cells, which are defined with respect to dQ/dV measurements during the formation cycles, and ending the formation process once the charging and/or discharging peaks disappear, optionally deriving the expected cell cycling lifetime by comparing the monitored peaks to specified thresholds that are correlated to the lifetime. The methods may be implemented by controller(s) at the battery, device and/or factory levels, which may be operated in combination. Formation processes and/or cell operation schemes may be adjusted accordingly, to avoid excessive dQ/dV rates and increase thereby the cell cycling lifetime.