公开(公告)号：US11223036B2

公开(公告)日：2022-01-11

申请号：US16686889

申请日：2019-11-18

Applicant: Apple Inc.

Inventor： Zuqin Liu ,  Richard M. Mank ,  Hyea Kim ,  Hongli Dai ,  Sunho Kang ,  Ji-Guang Zhang ,  Ran Yi ,  Qiuyan Li ,  Xiaolin Li ,  Wu Xu ,  Rajankumar L. Patel ,  Hyung-Seok Lim ,  Chongmin Wang ,  Langli Luo ,  Yang He

IPC: H01M4/134 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/02

Abstract: An anode active material comprises a silicon-carbon secondary particle comprising a composite having an exterior conformal carbon coating and formed of type I primary particles. Each type I primary particle comprises a core particle of interconnected silicon, the interconnected silicon formed of nano-sized silicon particles each connected to at least one other particle, inner pores internal to the core particle and defined by the interconnected silicon, an internal carbon coating on internal wall surfaces of the inner pores and a conformal carbon coating on the core particle.

公开(公告)号：US20240072246A1

公开(公告)日：2024-02-29

申请号：US18446310

申请日：2023-08-08

Applicant: Apple Inc.

Inventor： OuJung Kwon ,  Hyea Kim ,  Xianyu Li

IPC: H01M4/36 ,  H01M4/134 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M4/66

CPC classification number: H01M4/366 ,  H01M4/134 ,  H01M4/386 ,  H01M4/587 ,  H01M4/623 ,  H01M4/661 ,  H01M2004/027

Abstract: This disclosure relates generally to battery cells, and more particularly, anode active materials including two layers, for use in lithium ion battery cells.

公开(公告)号：US20230420742A1

公开(公告)日：2023-12-28

申请号：US17851135

申请日：2022-06-28

Applicant: Apple Inc.

Inventor： Woo Cheol Shin ,  Hyea Kim ,  OuJung Kwon

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/583 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M4/386 ,  H01M4/583 ,  H01M10/0567 ,  H01M2300/0042

Abstract: An electrochemical cell has an anode comprising a silicon-based active material, a cathode comprising a cathode active material, and an electrolyte. The electrolyte is formulated with a propionate-based solvent, a carbonate-based solvent, trifluoro toluene, a lithium salt with a molar concentration of 2.0 M or greater, and less than or equal to 5.0 wt. % of fluoroethylene carbonate.

公开(公告)号：US20200161635A1

公开(公告)日：2020-05-21

申请号：US16686889

申请日：2019-11-18

Applicant: Apple Inc.

Inventor： Zuqin Liu ,  Richard M. Mank ,  Hyea Kim ,  Hongli Dai ,  Sunho Kang ,  Ji-Guang Zhang ,  Ran Yi ,  Qiuyan Li ,  Xiaolin Li ,  Wu Xu ,  Rajankumar L. Patel ,  Hyung-Seok Lim ,  Chongmin Wang ,  Langli Luo ,  Yang He

IPC: H01M4/134 ,  H01M4/133 ,  H01M10/0525

Abstract: An anode active material comprises a silicon-carbon secondary particle comprising a composite having an exterior conformal carbon coating and formed of type I primary particles. Each type I primary particle comprises a core particle of interconnected silicon, the interconnected silicon formed of nano-sized silicon particles each connected to at least one other particle, inner pores internal to the core particle and defined by the interconnected silicon, an internal carbon coating on internal wall surfaces of the inner pores and a conformal carbon coating on the core particle.

公开(公告)号：US20230344262A1

公开(公告)日：2023-10-26

申请号：US17860806

申请日：2022-07-08

Applicant: Apple Inc.

Inventor： Hyea Kim ,  OuJung Kwon

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

CPC classification number: H02J7/007182 ,  H01M10/44 ,  H01M10/0525

Abstract: The present disclosure is directed to variable discharging protocols for one or more battery cells of a lithium-ion battery that improve the lifetime of the lithium-ion battery and/or the cell capacity of the battery. A battery management unit (BMU) controller of the lithium-ion battery may determine a number of cycles undergone by the one or more battery cells and modify a cut-off voltage (e.g., a lower cut-off voltage) based on the number of cycles. For example, the BMU controller may decrease the LCV after the number of cycles exceeds a threshold or is within a threshold range.

公开(公告)号：US20220037699A1

公开(公告)日：2022-02-03

申请号：US17130088

申请日：2020-12-22

Applicant: Apple Inc.

Inventor： Hyea Kim ,  OuJung Kwon ,  Woo Cheol Shin

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/38 ,  H01M10/0568 ,  H01M10/0567

Abstract: An electrochemical cell has an anode comprising a silicon-based active material, a cathode comprising a cathode active material, and an electrolyte having no ethylene carbonate. The electrolyte comprises a solvent, the solvent being 20 wt % to 50 wt % propylene carbonate with the remainder being a linear solvent, a lithium salt, and less than 15 wt % of one or more additives. The silicon-based anode active material has a specific capacity of ≥700 mAh/g.