公开(公告)号：US20230231115A1

公开(公告)日：2023-07-20

申请号：US18189268

申请日：2023-03-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hang SU ,  Yujing SHA ,  Shengan XIA ,  Fengchao XIE

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

CPC classification number: H01M4/366 ,  H01M4/386 ,  H01M4/0471 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/021

Abstract: In fields related to battery cathode material technologies, a nano-silicon composite material and a preparation method thereof, an electrode material, and a battery are provided to resolve large volume expansion of a cathode material of a battery and a serious side reaction with an electrolyte. The nano-silicon composite material includes a core, a first coating layer, and a second coating layer. The core includes a nano-silicon crystal. The first coating layer covers a surface of the core. The first coating layer is of a porous structure. A material of the first coating layer includes bisilicate and silicon oxide in a deoxidized state. The second coating layer covers a surface of the first coating layer. A material of the second coating layer includes silicon dioxide in a deoxidized state.

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：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：US20190067742A1

公开(公告)日：2019-02-28

申请号：US16171983

申请日：2018-10-26

Applicant: Huawei Technologies Co., Ltd. ,  DONGGUAN AISIPU ENERGY TECHNOLOGY CO., LTD.

Inventor： Guocheng XU ,  Fengchao XIE ,  Rui XU ,  Hui LI

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/42 ,  H01M10/0525 ,  H01M10/0568

Abstract: The present application provides a high-temperature lithium-ion battery electrolyte, including a lithium salt, an organic solvent, and a water removal additive. A structural formula of the water removal additive is shown as a formula (1): where R1 is a —NCH—(CH2)n—CN group, and 0≤n≤20; R2 is a —R11—CO—NR12R13 group, R11 is a —(CH2)m— group, 0≤m

公开(公告)号：US20180301699A1

公开(公告)日：2018-10-18

申请号：US16010947

申请日：2018-06-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiahua LIANG ,  Shengan XIA ,  Fengchao XIE

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  C01B32/21 ,  C01B32/05

Abstract: A lithium-ion rechargeable battery negative electrode active material and a preparation method thereof, a lithium-ion rechargeable battery negative electrode plate, and a lithium-ion rechargeable battery are disclosed. The negative electrode active material includes a carbon core and a coating layer formed on a surface of the carbon core, a material of the coating layer includes amorphous carbon and a doping element, and the doping element includes element nitrogen. The lithium-ion rechargeable battery negative electrode active material has the carbon core, and the coating layer that includes the doping element and the amorphous carbon is provided on the surface of the carbon core.