公开(公告)号：EP4290609A1

公开(公告)日：2023-12-13

申请号：EP22762519.1

申请日：2022-03-01

申请人： Huawei Technologies Co., Ltd.

发明人： LI, Zhengjie ,  SUN, Yongming ,  XIA, Shengan ,  LI, Yangxing ,  XIE, Fengchao

IPC分类号： H01M4/36 ,  H01M10/00 ,  H01M10/0525 ,  H01M4/58

摘要： This application provides an anode material, a composite anode material, a preparation method thereof, a secondary battery, and a terminal device. The anode material includes a core (01) and a coating layer (02) disposed on a surface of the core. The core (01) is a substance that can be reversibly inserted into or removed from a cathode material active ion or a substance that can perform reversible oxidation-reduction reaction with the cathode material active ion. A material of the coating layer (02) includes AxMy, where 0

公开(公告)号：EP4068410A1

公开(公告)日：2022-10-05

申请号：EP20892454.8

申请日：2020-06-28

申请人： Huawei Technologies Co., Ltd.

发明人： ZHOU, Wei ,  ZHOU, Huihui ,  DENG, Yaoming ,  LI, Yangxing

IPC分类号： H01M20060101

摘要： 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. In the foregoing technical solution, the first conductive part of the segment membrane is connected to one electrode (a cathode or an anode) of an electrode assembly, the second conductive part is connected to one electrode (a cathode or an anode) of the electrode assembly, and a parallel connection and a series connection of batteries in the battery combination are implemented by using the segment membrane. Therefore, a battery connection in the battery combination can be simplified, volume of the battery combination can be reduced, and an energy density of the battery combination can be improved.

公开(公告)号：EP3972029A1

公开(公告)日：2022-03-23

申请号：EP20812799.3

申请日：2020-02-26

申请人： Huawei Technologies Co., Ltd.

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

IPC分类号： H01M10/0567 ,  H01M10/0569

摘要： 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.

公开(公告)号：EP3812777A1

公开(公告)日：2021-04-28

申请号：EP19823205.0

申请日：2019-05-29

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： LI, Juan ,  LI, Hui ,  FAN, Tuanbao ,  LI, Yangxing

IPC分类号： G01R31/36

摘要： This application discloses a method and apparatus for estimating a state of charge of a battery, configured to improve accuracy of an estimated value of a state of charge of a battery. The method in this application includes: obtaining, at 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 value of a to-be-measured battery in real time; obtaining discharge duration of the to-be-measured battery; determining a current-moment internal resistance response type of the to-be-measured battery based on the discharge duration; determining current-moment internal resistance data of the to-be-measured battery based on the current-moment internal resistance response type, the current-moment temperature, the current-moment charge/discharge current, and the previous-moment state of charge value; determining a current-moment unusable capacity of the to-be-measured 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 state of charge value of the to-be-measured battery based on the current-moment coulomb capacity and the current-moment unusable capacity.

公开(公告)号：EP3719912A1

公开(公告)日：2020-10-07

申请号：EP18887713.8

申请日：2018-12-11

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： MA, Qiang ,  LI, Yangxing ,  QIN, Dejun

IPC分类号： H01M10/0567 ,  H01M10/0525

摘要： Embodiments of the present invention provides an electrolyte additive. A molecular structure of the electrolyte additive includes a six-membered ring structure including three nitrogen atoms and three phosphorous atoms; each phosphorous atom includes two substituted groups, and the substituted groups are respectively represented as R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 ; at least one substituted group of R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 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. The electrolyte additive has dual characteristics of flame resistance and high-voltage resistance. Applying the electrolyte additive to a lithium secondary battery can effectively improve high-voltage cycle performance and security reliability of the lithium secondary battery. The present invention further provides a lithium secondary battery electrolyte and a lithium secondary battery.

公开(公告)号：EP3537521A1

公开(公告)日：2019-09-11

申请号：EP17873724.3

申请日：2017-07-14

申请人： Huawei Technologies Co., Ltd.

发明人： LI, Yangxing ,  LEI, Dan

IPC分类号： H01M4/525

摘要： The present invention 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 Li 1+z Co 1-x-y Ma x Mb y O 2 , 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 Co 3+ is alleviated and delayed during charging.