Invention Grant
- Patent Title: Asymmetric battery pack utilizing C-Rate balancing
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Application No.: US16739488Application Date: 2020-01-10
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Publication No.: US11742512B2Publication Date: 2023-08-29
- Inventor: Loren L. Roy , Qingzhi Guo , Premanand Ramadass , Hyungook Yoon , Jinjun Shi
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: BakerHostetler
- Main IPC: H01M10/04
- IPC: H01M10/04 ; H01M10/0587 ; H01M10/44 ; H01M50/531 ; H01M50/247 ; H01M50/209 ; H01M10/42

Abstract:
Battery packs having jelly roll battery cells of different capacities may have an imbalance in the charging and/or discharging current supplied to and provided by each jelly roll due to differences in capacity specific impedance between the battery cells of the battery pack. A C-rate (i.e., current relative to rated capacity) of a lower capacity first battery cell and a higher capacity second battery cell connected in parallel may be balanced by repositioning and/or increasing the number of cathode tabs and anode tabs of the second jelly roll battery cell to reduce an impedance of the second battery cell.
Public/Granted literature
- US20200313223A1 ASYMMETRIC BATTERY PACK UTILIZING C-RATE BALANCING Public/Granted day:2020-10-01
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