公开(公告)号：US20230006307A1

公开(公告)日：2023-01-05

申请号：US17900644

申请日：2022-08-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xinzhi ZHANG ,  Yaoming DENG ,  Yunlei GAO ,  Dongfang YANG ,  Fan XU ,  Fengchao XIE ,  Zhengjie LI

IPC: H01M50/417 ,  H01M10/0525 ,  H01M50/449 ,  H01M50/403

Abstract: Embodiments of this application provide a battery separator, including a polyolefin-based porous separator, where the polyolefin-based porous separator includes polyethylene resin, an elongation rate of the polyolefin-based porous separator in an MD direction is greater than 120%, an elongation rate in a TD direction is greater than 120%, and for the polyolefin-based porous separator, crystallinity at a first-time temperature rise of polyethylene that is measured by using a differential scanning calorimeter is less than 65%, crystallinity at a second-time temperature rise is less than 55%, and a difference between the crystallinity at the first-time temperature rise and the crystallinity at the second-time temperature rise is less than 12%. The battery separator features a high elongation rate and a low temperature of closing a pore.

公开(公告)号：US20220344639A1

公开(公告)日：2022-10-27

申请号：US17854236

申请日：2022-06-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dan LEI ,  Yujing SHA ,  Yaoming DENG ,  Shengan XIA

IPC: H01M4/36 ,  H01M4/48 ,  H01M4/38 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/04

Abstract: A silicon-based negative electrode material and a method for preparing the same, a battery including the silicon-based negative electrode material, and a terminal are provided. The silicon-based negative electrode material includes a silicon-based matrix with a low silicon-oxygen ratio and silicon-based particles with a high silicon-oxygen ratio dispersed in the silicon-based matrix with the low silicon-oxygen ratio. A silicon-oxygen ratio of the silicon-based matrix with the low silicon-oxygen ratio is 1:x, and 1

公开(公告)号：US20220294083A1

公开(公告)日：2022-09-15

申请号：US17826875

申请日：2022-05-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Wei ZHOU ,  Huihui ZHOU ,  Yaoming DENG ,  Yangxing LI

IPC: H01M50/477 ,  H01M50/569

Abstract: This application provides a segment membrane, a battery combination, and an electrical device. The segment membrane includes a conductive layer, a first insulation layer, and a second insulation layer that are disposed in a laminated manner, where the conductive layer is located between the first insulation layer and the second insulation layer. The conductive layer includes a first conductive part and a second conductive part that are disposed in a laminated manner and electrically connected. The first insulation layer is a frame structure, and the first insulation layer is disposed on a surface that is of the first conductive part and that is away from the second conductive part. The second insulation layer is a frame structure, and the second insulation layer is disposed on a surface that is of the second conductive part and that is away from the first conductive part.

公开(公告)号：US20230163417A1

公开(公告)日：2023-05-25

申请号：US18145749

申请日：2022-12-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhengjie LI ,  Yaoming DENG ,  Xinzhi ZHANG ,  Yunlei GAO ,  Dongfang YANG ,  Da HONG ,  Fengchao XIE

IPC: H01M50/463 ,  H01M50/414 ,  H01M4/62

CPC classification number: H01M50/463 ,  H01M4/624 ,  H01M50/414

Abstract: This application provides a secondary battery, including at least one battery unit assembly. The battery cell assembly includes a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate. An elongation rate of the separator is greater than 100%, the elongation rate of the separator includes an elongation rate in the length direction and/or an elongation rate in the width direction, a ratio of the elongation rate of the separator to a thickness of the active material layer of the positive electrode plate and/or negative electrode plate is 3.0%/µm to 8.0%/µm, and a ratio of the elongation rate of the separator to an elongation rate of the current collector of the positive electrode plate and/or negative electrode plate is greater than or equal to 60.

公开(公告)号：US20220085413A1

公开(公告)日：2022-03-17

申请号：US17536697

申请日：2021-11-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qiang MA ,  Dejun QIN ,  Yaoming DENG ,  Yangxing LI ,  Fan XU

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

Abstract: Embodiments of the present invention provide a lithium secondary battery electrolyte including a lithium salt, an organic solvent, and a flame retardant, and the flame retardant includes (pentafluoro) cyclotriphosphazene substituted by an electron donating group and (pentafluoro) cyclotriphosphazene substituted by an electron withdrawing group. Both two flame retardants: the (pentafluoro) cyclotriphosphazene substituted by the electron donating group and the (pentafluoro) cyclotriphosphazene substituted by the electron withdrawing group are added to the lithium secondary battery electrolyte, so that a battery has both high safety performance and good electrochemical performance. The embodiments of the present invention further provide a preparation method for the lithium secondary battery electrolyte and a lithium secondary battery including the lithium secondary battery electrolyte.