Invention Grant
- Patent Title: Using formation parameters to extend the cycling lifetime of lithium ion batteries
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Application No.: US16689261Application Date: 2019-11-20
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Publication No.: US11152602B2Publication Date: 2021-10-19
- Inventor: Assaf Grunwald , Leonid Krasovitsky , Dmitry Voyevodin
- Applicant: StoreDot Ltd.
- Applicant Address: IL Herzeliya
- Assignee: StoreDot Ltd.
- Current Assignee: StoreDot Ltd.
- Current Assignee Address: IL Herzeliya
- Agency: Reches Patents
- Main IPC: H02J7/00
- 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.
Public/Granted literature
- US20200152960A1 USING FORMATION PARAMETERS TO EXTEND THE CYCLING LIFETIME OF LITHIUM ION BATTERIES Public/Granted day:2020-05-14
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