公开(公告)号：US10790511B2

公开(公告)日：2020-09-29

申请号：US16422078

申请日：2019-05-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yangxing Li ,  Dan Lei

IPC: H02J7/00 ,  H02J7/14 ,  H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/46 ,  H01M4/02

Abstract: The present application provides a lithium cobalt oxide positive electrode material, that is, a doped lithium cobalt oxide material: A general formula of doped lithium cobalt oxide is Li1+zCo1−x−yMaxMbyO2, where 0≤x≤0.01, 0≤y≤0.01, and −0.05≤z≤0.08; Ma is a doped monovalent element, and is at least one of Al, Ga, Hf, Mg, Sn, Zn, or Zr; and Mb is a doped polyvalent element, and is at least one of Ni, Mn, V, Mo, Nb, Cu, Fe, In, W, or Cr. Through substitutional doping of a monovalent element, mutation of a layered structure caused by lithium deintercalation is minimized. Through interstitial doping of a polyvalent element, oxidation of Co3+ is alleviated and delayed during charging.

公开(公告)号：US11349163B2

公开(公告)日：2022-05-31

申请号：US16582557

申请日：2019-09-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huihui Zhou ,  Yangxing Li ,  Chenguang Liu ,  Guocheng Xu

IPC: H01M4/133 ,  H01M4/1393 ,  H01M10/654 ,  H01M4/62 ,  H01M10/42

Abstract: An electrode material layer includes an electrode active material and graphene of a sheet-like structure, a surface of the graphene is modified with magnetic response nanodots, and in the graphene, more than 50% of the graphene is arranged at an angle of 45° to 90° with respect to a surface, of the current collector, on which the electrode material layer is disposed, to form a heat conduction path having a specific orientation.

公开(公告)号：US20210103002A1

公开(公告)日：2021-04-08

申请号：US17126895

申请日：2020-12-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Juan Li ,  Hui Li ,  Tuanbao Fan ,  Yangxing Li

IPC: G01R31/3842 ,  G01R31/389

Abstract: A method and apparatus include obtaining, during a preconfigured time interval, a current-moment charge/discharge current, a current-moment temperature, a current-moment coulomb capacity, and a previous-moment state of charge (SOC) value of a battery, obtaining a discharge duration of the battery, determining a current-moment internal resistance response type of the battery based on the discharge duration, determining current-moment internal resistance data of the battery based on the current-moment internal resistance response type, the current-moment temperature, the current-moment charge/discharge current, and the previous-moment SOC value, determining a current-moment unusable capacity of the battery based on the current-moment internal resistance data, the current-moment charge/discharge current, and the current-moment temperature, and determining a current-moment SOC value of the battery based on the current-moment coulomb capacity and the current-moment unusable capacity.

公开(公告)号：US20220255055A1

公开(公告)日：2022-08-11

申请号：US17733167

申请日：2022-04-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hang Su ,  Guocheng Xu ,  Pinghua Wang ,  Yangxing Li

IPC: H01M4/134 ,  H01M4/62 ,  H01M10/0525

Abstract: Embodiments of the present invention provide a negative electrode material, including a doped silicon-based material. The doped silicon-based material includes a silicon-based material and doping metal elements distributed inside particles of the silicon-based material. The silicon-based material includes nano-silicon or silicon monoxide. A doping amount of the doping metal elements ranges from 1 ppm to 1000 ppm. The negative electrode material is obtained by doping metal elements with an extreme low content into a crystal structure of the silicon-based material, to maintain stability of an original crystal structure of the silicon-based material while improving conducting performance of the silicon-based material. Therefore, an energy density of a cell can be effectively improved, and the silicon-based material is not prone to be pulverized in a charging/discharging process. The embodiments of the present invention further provide a production method of the negative electrode material, a lithium-ion battery, and a terminal.

公开(公告)号：US11283067B2

公开(公告)日：2022-03-22

申请号：US16586478

申请日：2019-09-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhexun Yu ,  Yangxing Li

IPC: H01M4/36 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/587 ,  H01M4/02

Abstract: A method for preparing an electrode material, an electrode material, and a battery are provided to resolve a prior-art problem that a silicon negative electrode material in a battery is prone to pulverization in a fully intercalated state. The electrode material includes a layered silicon core and graphene quantum dots. The layered silicon core includes at least two layers of silicon-based materials, an interlayer gap exists between two neighboring layers of the at least two layers of silicon-based materials, and the silicon-based material includes at least one of silicon or an oxide of silicon. The graphene quantum dots are located in the interlayer gap between the at least two layers of silicon-based materials.

公开(公告)号：US20210175497A1

公开(公告)日：2021-06-10

申请号：US17179794

申请日：2021-02-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hang Su ,  Pinghua Wang ,  Yangxing Li

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/38 ,  H01M4/48 ,  H01M4/62

Abstract: A silicon-based composite anode material for a battery includes a silicon-based material core and a coating layer coated on a surface of the silicon-based material core. The coating layer includes a first coating layer disposed on the surface of the silicon-based material core and a second coating layer disposed on a surface of the first coating layer. The first coating layer includes a two-dimensional quinone-aldehyde covalent organic framework material, and the second coating layer includes a material with high ionic conductivity. The second coating layer is relatively rigid, and can maintain structural stability of the entire material during silicon expansion and contraction, and effectively alleviates volume expansion.

公开(公告)号：US20200303775A1

公开(公告)日：2020-09-24

申请号：US16899146

申请日：2020-06-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Ma ,  Yangxing Li ,  Dejun Qin

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/131

Abstract: A electrolyte additive includes a six-membered ring structure including three nitrogen atoms and three phosphorus (P) atoms, where each P atom includes two substituted groups, and the substituted groups are represented as R1, R2, R3, R4, R5, and R6, at least one substituted group of R1, R2, R3, R4, R5, and R6 is a substituted sulfonic group, and a remaining substituted group is any one selected from fluorine, chlorine, bromine, alkyl, haloalkyl, alkoxy, haloalkoxy, alkeny, haloalkenyl, alkenyloxy, haloalkenyloxy, aryl, haloaryl, aryloxy, haloaryloxy, a substituted phosphate ester group, a substituted imide group, and a substituted sulfonyl imide group.

公开(公告)号：US12166218B2

公开(公告)日：2024-12-10

申请号：US16717111

申请日：2019-12-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liang Fan ,  Wei Zhou ,  Yangxing Li ,  Pinghua Wang ,  Yong Cao

IPC: H01M50/136 ,  H01M50/105 ,  H01M50/117 ,  H01M50/119 ,  H01M50/121 ,  H01M50/129 ,  H01M50/14 ,  H01M50/178 ,  H01M50/184 ,  H01M50/557

Abstract: One example of a flexible battery includes an electrochemical cell layer and a wrapping layer that wraps the electrochemical cell layer. The flexible battery further includes an energy absorbing layer. The energy absorbing layer is located between the wrapping layer and upper and lower surfaces, which are opposite to each other, of the electrochemical cell layer. The energy absorbing layer includes a plurality of supporting parts that protrude outward from the upper or lower surface of the electrochemical cell layer. The plurality of supporting parts are mainly made of a foam material or rubber. For the energy absorbing layer, a lower-modulus buffering layer or an empty part may be further disposed between the electrochemical cell layer and the wrapping layer, to complement a wavy surface of the supporting part to form a flat surface, so as to meet diversified requirements of a wearable device.

公开(公告)号：US20210328449A1

公开(公告)日：2021-10-21

申请号：US17357077

申请日：2021-06-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liangyu Li ,  Juan Li ,  Pinghua Wang ,  Yong Cao ,  Yangxing Li

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/48

Abstract: In a method of charging a battery, a charging control device obtains a battery parameter that includes an electrode parameter of the battery and one or more of a structure parameter, a manufacturing process parameter, an electrical parameter, an electrolyte parameter, a diaphragm parameter, and a thermophysical parameter of the battery. The charging control device inputs the battery parameter input into a battery model represented by an ordinary differential equation to obtain a safe charging boundary value of the battery in n cycles, where n is greater than or equal to 2 and less than or equal to N, N is a cycle life of the battery, and the n cycles refer to n cycles selected from 0 to N cycles. The safe charging boundary value is a maximum charging current in which no lithium plating occurs on the battery in different states of charge SOCs and at different temperatures.

公开(公告)号：US20200020996A1

公开(公告)日：2020-01-16

申请号：US16582557

申请日：2019-09-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huihui Zhou ,  Yangxing Li ,  Chenguang Liu ,  Guocheng Xu

IPC: H01M10/654 ,  H01M4/62 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/42

Abstract: An electrode material layer includes an electrode active material and graphene of a sheet-like structure, a surface of the graphene is modified with magnetic response nanodots, and in the graphene, more than 50% of the graphene is arranged at an angle of 45° to 90° with respect to a surface, of the current collector, on which the electrode material layer is disposed, to form a heat conduction path having a specific orientation.