Patents by Inventor MiaoMiao DONG

MiaoMiao DONG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230369562
    Abstract: An electrode plate and a method for preparing the electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus are described. The electrode plate includes a current collector and an active substance layer provided on at least one surface of the current collector. The active substance layer includes an active main material and a porous material. The active substance layer has pores, where the pore runs through or not through the active substance layer. Thickness of the active substance layer is x, and distance between two end openings of the pore in a direction perpendicular to the active substance layer is y, where x and y satisfy the following condition: 0.1?x?y?x.
    Type: Application
    Filed: July 26, 2023
    Publication date: November 16, 2023
    Applicant: Contemporary Amperex Technology CO., Limited
    Inventors: Lili WU, Miaomiao Dong, Xin Sun, Xingbu Chen, Xuan Li, Liang Yun, Peidong Song
  • Publication number: 20230369590
    Abstract: A secondary battery includes a negative electrode plate. A negative electrode active material layer of the negative electrode plate includes a porous carbon material. The negative electrode active material layer has a pore. The pore runs through or not through the negative electrode active material layer. Lithium metal is present in the pore.
    Type: Application
    Filed: July 7, 2023
    Publication date: November 16, 2023
    Inventors: Lili WU, Peidong SONG, Xin SUN, Liang YUN, Xingbu CHEN, Miaomiao DONG, Xuan LI
  • Publication number: 20230327100
    Abstract: A single-crystalline-structured low-cobalt ternary positive material, a chemical formula thereof is Li1+x(NiaCobMnc)1-dMdO2-yAy, where a mole fraction of Co element is low. 0.05 ? b ? 0.14; and in a single particle, a ratio of an average Co content per unit area of an outer layer to an average Co content per unit area of an inner core in a cross section passing through a geometric center of the particle is in a range 1.2-5.0:1, optionally, in a range 1.4-2.0:1 is disclosed. The material has better structural stability and dynamic performance at low temperature and high voltage, which improves cycle performance and power performance of the secondary battery at low temperature and high voltage.
    Type: Application
    Filed: May 26, 2023
    Publication date: October 12, 2023
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Huan NI, Changfeng BIE, Xiang YIN, Shaocong OUYANG, Miaomiao DONG, Na LIU
  • Publication number: 20230231202
    Abstract: A battery pack may include a first battery cell type and a second battery cell type, wherein the first battery cell type may include n first battery cells, and the second battery cell type may include m second battery cells, with n and m being each independently selected from an integer of 1 or more, wherein the second battery cell may have a discharge power at ?20° C. greater than that of the first battery cell, the difference in discharge power at ?20° C. between the second battery cells and the first battery cells being ?10 W; the percentage by number of the first battery cells in the battery cells comprised in area A may be 20% to 100%, and the percentage by number of the second battery cells in the battery cells comprised in the area B may be 5% to 100%.
    Type: Application
    Filed: March 8, 2023
    Publication date: July 20, 2023
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Shaocong OUYANG, Chenghua FU, Baoyun XU, Miaomiao DONG, Yonghuang YE
  • Publication number: 20230207938
    Abstract: A battery pack may comprise a first battery cell type and a second battery cell type, wherein the first battery cell type may include n first battery cells, and the second battery cell type may include m second battery cells, with n and m being each independently selected from an integer of 1 or more. The second battery cell may have an internal resistance less than that of the first battery cell, the difference in internal resistance between the first battery cell and the second battery cell may be ?0.15 mohm; the percentage by number of the first battery cells in the battery cells comprised in the area A may be 20% to 100%; and the percentage by number of the second battery cells in the battery cells comprised in the area B may be 5% to 100%.
    Type: Application
    Filed: March 4, 2023
    Publication date: June 29, 2023
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Shaocong OUYANG, Chenghua FU, Miaomiao DONG, Yonghuang YE, Changfeng BIE
  • Publication number: 20230197959
    Abstract: A positive electrode composite material for a lithium-ion secondary battery is provided. In some embodiments, the positive electrode composite material for a lithium-ion secondary battery comprises: a positive electrode active material selected from at least one of a lithium iron phosphate material and a nickel cobalt lithium manganate material; and at least one of compounds represented by AaMb(PO4)cXd, wherein A is selected from at least one of Li, Na, K, and Ca, M is selected from at least one of V and Mn, X is selected from any one of halogen elements, a, b, and c are each independently selected from an integer from 1 to 6, and d is selected from an integer from 0 to 3.
    Type: Application
    Filed: December 15, 2022
    Publication date: June 22, 2023
    Inventors: Miaomiao Dong, Shaocong Ouyang, Chenghua Fu, Changfeng Bie
  • Publication number: 20230170472
    Abstract: A positive electrode plate may include a current collector, a first positive electrode active material layer and a second positive electrode active material layer. The first positive electrode active material layer may comprise a first positive electrode active material, a first binder and a first conductive agent; the second positive electrode active material layer may comprise a second positive electrode active material, a second binder and a second conductive agent. The second positive electrode active material may be selected from carbon-coated Li?Fe?M(1??)PO4, and the second positive electrode active material may have a diffraction peak A between 29° and 30° in the X-ray diffraction pattern, and a diffraction peak B between 25° and 26°, and the intensity ratio IA/IB of the diffraction peaks may satisfy: 0.98?IA/IB?1.1.
    Type: Application
    Filed: December 20, 2022
    Publication date: June 1, 2023
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Changfeng BIE, Huan NI, Xue LENG, Miaomiao DONG, Shaocong OUYANG, Na LIU
  • Patent number: 11627473
    Abstract: A method for determining a layout of a wireless communication network is provided in the present invention. Numerous realizations of user device placement in a considered geometry are measured to reflect the practical distribution of the user devices in a more accurate way than the conventional approach which emulates the randomness of placements of user devices using a tractable stochastic process. Moreover, a scenario sampling approach is used to provide a lower-complexity and higher efficient way to yield optimal base station deployment results while guaranteeing the quality of service of a specified majority of the overall user device realizations.
    Type: Grant
    Filed: July 5, 2021
    Date of Patent: April 11, 2023
    Assignee: City University of Hong Kong
    Inventors: Miaomiao Dong, Jingjin Timothy Wu, Wing-Ming Eric Wong
  • Publication number: 20220007203
    Abstract: A method for determining a layout of a wireless communication network is provided in the present invention. Numerous realizations of user device placement in a considered geometry are measured to reflect the practical distribution of the user devices in a more accurate way than the conventional approach which emulates the randomness of placements of user devices using a tractable stochastic process. Moreover, a scenario sampling approach is used to provide a lower-complexity and higher efficient way to yield optimal base station deployment results while guaranteeing the quality of service of a specified majority of the overall user device realizations.
    Type: Application
    Filed: July 5, 2021
    Publication date: January 6, 2022
    Inventors: Miaomiao DONG, Jingjin Timothy WU, Wing-Ming Eric WONG
  • Publication number: 20210249722
    Abstract: The application relates to a secondary battery comprising a package bag and a battery core arranged in the package bag, the positive electrode plate comprising a positive current collector and a positive electrode film disposed on at least one surface of the positive electrode current collector and comprising a positive active material; and the negative electrode plate comprising a negative electrode current collector and a negative electrode film provided on at least one surface of the negative electrode current collector and comprising a negative active material, characterized in that the positive active material comprises one or more of lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminum oxide, and at least a part of the positive active material comprises a single crystal particle; the negative active material comprises a silicon-based material and a graphite material; and the package bag has a sealing width of 3 mm to 8 mm.
    Type: Application
    Filed: April 30, 2021
    Publication date: August 12, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Miaomiao DONG, Chenchen ZHANG
  • Patent number: 10200894
    Abstract: Interference management methods are proposed to facilitate multi-cell, multi-user millimeter wave cellular networks. One method includes a feedback approach in which a base station (BS) device collects information from mobile devices in the cell operated by the BS device and other BS devices in other cells. Each mobile device feeds back a best beams set and a worst interference beams set to its serving BS device and the information is shared amongst other BS devices in the network. According to the information, BS devices implement a beam selection criterion to select a beam for downlink transmission. To reduce feedback cost, another method leverages the channel reciprocity in time division duplexing to use the measured uplink power and interference information to select the narrow beam for downlink transmission. The BS device selects the narrow beam that establishes a reliable channel and reduces interference to mobile devices in neighboring cells.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: February 5, 2019
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: MiaoMiao Dong, WaiMing Chan, Taejoon Kim
  • Publication number: 20170311187
    Abstract: Interference management methods are proposed to facilitate multi-cell, multi-user millimeter wave cellular networks. One method includes a feedback approach in which a base station (BS) device collects information from mobile devices in the cell operated by the BS device and other BS devices in other cells. Each mobile device feeds back a best beams set and a worst interference beams set to its serving BS device and the information is shared amongst other BS devices in the network. According to the information, BS devices implement a beam selection criterion to select a beam for downlink transmission. To reduce feedback cost, another method leverages the channel reciprocity in time division duplexing to use the measured uplink power and interference information to select the narrow beam for downlink transmission. The BS device selects the narrow beam that establishes a reliable channel and reduces interference to mobile devices in neighboring cells.
    Type: Application
    Filed: April 22, 2016
    Publication date: October 26, 2017
    Inventors: MiaoMiao DONG, WaiMing CHAN, Taejoon KIM
  • Patent number: D871925
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: January 7, 2020
    Assignee: QINGDAO WOHLER HOUSEHOLD PRODUCTS CO., LTD.
    Inventors: Bin Zhang, Miaomiao Dong