Patents by Inventor Chengdu Liang

Chengdu Liang 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: 20230307656
    Abstract: A secondary battery includes an electrode plate including a current collector, a functional layer, and an active material layer. At least a portion of a surface of the current collector includes a plurality of protruding portions and a plurality of recessed portions. The functional layer is disposed in one or more of the plurality of recessed portions. The active material layer covers and contacts the current collector and the functional layer. The functional layer includes at least one of a polymer material or a positive temperature coefficient (PTC) material.
    Type: Application
    Filed: May 11, 2023
    Publication date: September 28, 2023
    Inventors: Huaichao TANG, Kai WU, Chengdu LIANG, Wei LI
  • Publication number: 20230282918
    Abstract: Provided are a box, a battery, an electrical device, and a method for manufacturing the battery, which belong to the technical field of energy storage devices. The box is applicable to a battery, the battery includes a battery cell, in which the box includes a plurality of box walls, in which the plurality of box walls enclose a first chamber for accommodating the battery cell, and at least one of the box walls is internally provided with a second chamber for accommodating fire-fighting agent, in which the first chamber and the second chamber are configured to be able to communicate with each other when the battery cell is thermal-runaway, so that the fire-fighting agent releases fire-fighting medium into the first chamber. The box, the battery, the electrical device and the method for manufacturing the battery can improve the safety performance of the battery.
    Type: Application
    Filed: May 12, 2023
    Publication date: September 7, 2023
    Inventors: Chengdu Liang, Zhiming Chen, Jian Pan, Hui Yang
  • Publication number: 20230282824
    Abstract: A lithium ion secondary battery and a preparation method therefor, a battery module, a battery pack, and a device are provided. In some embodiments, the lithium ion secondary battery comprises a positive electrode plate, a negative electrode plate and an electrolyte, wherein the positive electrode plate comprises a positive electrode active material and a positive electrode lithium-supplementing material comprising a lithium-rich metal oxide, and the lithium-rich metal oxide comprises one or more elements of Ni, Co, Fe, Mn, and Cu; the electrolyte comprises an electrolyte lithium salt and a solvent, and has a percentage ? of the total mass of a fluorine element in the anions of the electrolyte lithium salt relative to the total mass of the electrolyte of <14%.
    Type: Application
    Filed: March 21, 2023
    Publication date: September 7, 2023
    Inventors: Haotian Xie, Peipei Chen, Xin Sun, Bangrun Wang, Jiantao Huang, Xingbu Chen, Xiao Chen, Na Liu, Chengdu Liang
  • Publication number: 20230261178
    Abstract: This application provides a composite positive-electrode material and a preparation method thereof, a positive-electrode plate, a secondary battery, and a battery module, a battery pack, and an apparatus containing such secondary battery. The composite positive-electrode material includes a core and a coating layer covering at least part of a surface of the core, where the core includes a positive-electrode pre-lithiation material, the positive-electrode pre-lithiation material includes a lithium-rich metal oxide, and the coating layer includes a positive-electrode active material.
    Type: Application
    Filed: October 21, 2022
    Publication date: August 17, 2023
    Inventors: Bangrun WANG, Na LIU, Chengdu LIANG, Yongchao LIU, Xin SUN, Haotian XIE
  • Publication number: 20230261491
    Abstract: A method for recovering activity of a battery includes obtaining a battery state-of-health value of the battery during a charging process, applying an activation voltage to the battery in response to the battery state-of-health value being less than or equal to a first preset threshold such that lithium ions at a lithium supplement agent of the battery are released to an electrolyte solution, and stopping application of the activation voltage and continuing a normal charge-discharge cycle in response to the battery state-of-health value increasing to be greater than or equal to a second preset threshold. The activation voltage is higher than a normal charging voltage of the battery.
    Type: Application
    Filed: April 5, 2023
    Publication date: August 17, 2023
    Inventors: Haotian XIE, Xingbu CHEN, Xin SUN, Bangrun Wang, Xiao CHEN, Na LIU, Chengdu LIANG
  • Publication number: 20230231249
    Abstract: The present application discloses a battery module, a battery pack, an apparatus, and a method and device for manufacturing a battery module. The battery module includes n first-type battery cells and m second-type battery cells, n?1, m?1, and the n first-type battery cells and them second-type battery cells are arranged and satisfy: VED1>VED2, ?F1>?F2, and (?F1×n+?F2×m)/(n+m)?0.8×?F1, where VED1, VED2, ?F1 and ?F2 are respectively defined in the description.
    Type: Application
    Filed: October 21, 2022
    Publication date: July 20, 2023
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu LIANG, Quanguo LI, Yonghuang YE, Qian LIU, Haizu JIN, Wei LI
  • Publication number: 20230231263
    Abstract: This application provides a battery, an apparatus, and a manufacturing method and an apparatus of batteries, and relates to the field of energy storage technologies. The battery includes two battery cells and two discharge channels. The two battery cells each include a pressure relief mechanism, and the pressure relief mechanism is configured to be actuated when internal pressure or temperature in the battery cell reaches a threshold, to release the internal pressure. The two discharge channels are configured to collect emissions respectively from the corresponding battery cell when the pressure relief mechanism is actuated.
    Type: Application
    Filed: November 10, 2022
    Publication date: July 20, 2023
    Inventors: Quanguo LI, Yonghuang YE, Haizu JIN, Chengdu LIANG, Qian LIU
  • Publication number: 20230223521
    Abstract: The present invention relates to an electrode active material, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active material includes: a core and a coating layer, where the core includes a ternary material, the coating layer coats the core, the coating layer includes a reaction product of a sulfur-containing compound and a lithium-containing compound, and the reaction product includes element Li, element S, and element O.
    Type: Application
    Filed: February 10, 2023
    Publication date: July 13, 2023
    Inventors: Chengdu LIANG, Yongchao LIU, Na LIU, Yingjie GUAN, Qisen HUANG, Wei FU
  • Publication number: 20230207782
    Abstract: This application relates to an electrode active composition, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active composition includes: a first component, the first component being lithium cobalt oxide particles; and a second component, the second component being ternary material particles. The first component includes lithium cobalt oxide particles with a particle size greater than 11 ?m and lithium cobalt oxide particles with a particle size less than 6 ?m, and a ratio in number of the lithium cobalt oxide particles with a particle size greater than 11 ?m to the lithium cobalt oxide particles with a particle size less than 6 ?m is 0.2-4.8, and in some embodiments, 0.2-2.8. A summed number of the lithium cobalt oxide particles with a particle size greater than 11 ?m and the lithium cobalt oxide particles with a particle size less than 6 ?m accounts for above 90% of a total number of particles in the first component.
    Type: Application
    Filed: February 14, 2023
    Publication date: June 29, 2023
    Inventors: Yingjie GUAN, Yongchao LIU, Qisen HUANG, Na LIU, Chengdu LIANG
  • Publication number: 20230207812
    Abstract: This application discloses a lithium supplement for lithium secondary batteries, a preparation method thereof, and a lithium secondary battery, a battery module, a battery pack, and an apparatus. Tests show that the lithium supplement of this application can maintain its own stability and low metal dissolution during long-term use of lithium secondary batteries, effectively improving energy density of lithium secondary batteries and ensuring a low self-discharge rate of lithium secondary batteries, thereby ensuring that the lithium secondary battery has high energy density, long cycle life, and high safety.
    Type: Application
    Filed: December 2, 2022
    Publication date: June 29, 2023
    Inventors: Bangrun WANG, Na LIU, Chengdu LIANG, Yongchao LIU, Xin SUN, Haotian XIE
  • Patent number: 11658329
    Abstract: The present disclosure provides a secondary battery and an electrode plate thereof. The electrode plate comprises a current collector, an active material layer and a second conducting layer. The current collector comprises an insulating layer and a first conducting layer disposed on at least one surface of the insulating layer; and the active material layer is disposed on a main portion of the first conducting layer. The first conducting layer further includes a protruding portion not coated with the active material layer. The second conducting layer comprises a first portion disposed on a surface of the protruding portion of the first conducting layer opposite to the insulating layer. The secondary battery comprises an electrode assembly, the electrode assembly comprises the electrode plate.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: May 23, 2023
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Wei Li, Zige Zhang, Chengdu Liang, Qingrui Xue, Jing Li, Pengxiang Wang
  • Publication number: 20230125313
    Abstract: An end cap assembly, a battery cell, a battery, and an electrical device are provided. The end cap assembly is applicable to a battery cell. The end cap assembly includes: an end cap body; a pressure relief component, connected to the end cap body, where a first through-hole configured to inject an electrolytic solution is made on the pressure relief component, and the pressure relief component is configured to be actuated when an internal pressure of the battery cell reaches a threshold, so as to release the internal pressure of the battery cell; and a closing component, detachably disposed on the pressure relief component, where the closing component is configured to close the first through-hole.
    Type: Application
    Filed: December 21, 2022
    Publication date: April 27, 2023
    Inventors: Chengdu Liang, Shoujun Huang, Xinxiang Chen, Yulian Zheng, Peng Wang, Wei Li
  • Publication number: 20230128934
    Abstract: The present application provides a lithium ion battery, comprising an electrode assembly and an electrolyte comprising a fluorosulfonate and/or difluorophosphate substance. The lithium ion battery has a gas generation area coefficient during formation, defined as ?, with ?=M×S/200; wherein M is in the range of 5 mg/cm2-100 mg/cm2; S is the specific surface area of the negative electrode material on the negative electrode current collector and is in the range of 0.1 m2/g-10 m2/g; the lithium ion battery has a gas venting path coefficient defined as ?, with ?=100/L, wherein L is in the range of L?50 mm; the mass percentage content w % of the fluorosulfonate and/or difluorophosphate substance in the electrolyte and ? and ? meet the equation 0.01?w×?/??20.
    Type: Application
    Filed: December 21, 2022
    Publication date: April 27, 2023
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Hailin ZOU, Peipei CHEN, Chang PENG, Chengdu LIANG
  • Publication number: 20230119054
    Abstract: The present application provide a silicon-oxygen compound, a secondary battery using it, and related battery modules, battery packs, and devices. The silicon-oxygen compound provided by the present application has a formula of SiOx, in which x satisfies 0<x<2. The silicon-oxygen compound contains both sulfur and aluminum element, and the sulfur element is present in an amount of 20 ppm˜300 ppm. The mass ratio of sulfur element to aluminum element is from 1.5 to 13.0. A secondary battery uses the silicon-oxygen compound provided in the present application, so that the secondary battery can have both long-cycle performance and high initial coulombic efficiency.
    Type: Application
    Filed: November 1, 2022
    Publication date: April 20, 2023
    Inventors: Chengdu Liang, Yingjie Guan, Yuzhen Zhao, Yan Wen, Qisen Huang
  • Patent number: 11621425
    Abstract: A positive electrode current collector, a positive electrode piece, an electrochemical device and an apparatus, where the positive electrode current collector includes a support layer and a conductive layer provided on the support layer, where a material of the conductive layer is aluminum or aluminum alloy, and a thickness D1 of the conductive layer is 300 nm?D1?2 ?m; an elongation at break B of the support layer is 10,000%?B?12%, and a volume resistivity of the support layer is greater than or equal to 1.0×10?5 ?·m; when a tensile strain of the positive electrode current collector is 2%, a square resistance growth rate T1 of the conductive layer is T1?10%. The positive electrode current collector provided in the present application can simultaneously take into account both high safety performance and electrical performance.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: April 4, 2023
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Qisen Huang, Shiwen Wang
  • Publication number: 20230083168
    Abstract: A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0<x?3.0.
    Type: Application
    Filed: November 16, 2022
    Publication date: March 16, 2023
    Inventors: Xin Liu, Qisen Huang, Mingling Li, Xianghui Liu, Cheng Li, Jia Peng, Chengdu Liang
  • Publication number: 20230084044
    Abstract: A box body includes a carrying plate configured to carry a battery and a one-way gravity valve disposed at the carrying plate. The one-way gravity valve is configured to be closed in response to a gravity of liquid in the box body being less than a threshold, and to be open in response to the gravity of the liquid in the box body reaching the threshold.
    Type: Application
    Filed: November 10, 2022
    Publication date: March 16, 2023
    Inventors: Chengdu LIANG, Jiarong HONG, Xiaoteng HUANG, Wenli WANG, Haiqi YANG, Langchao HU, Chenyi XU
  • Publication number: 20230076751
    Abstract: Embodiments of this application provide a battery, an apparatus using a battery, and a manufacturing method and a manufacturing device of battery. The battery includes a battery cell and a thermal management component. The battery cell has a side wall and a bottom wall that are connected to each other. The thermal management component is configured to accommodate fluid to regulate temperature of the battery cell, where an accommodating portion is provided on the thermal management component, and configured to accommodate the battery cell, and the accommodating portion is attached to the bottom wall and side wall of the battery cell, to enable heat transfer between the battery cell and the thermal management component. The battery cell in the battery provided in the embodiments of this application can dissipate heat efficiently.
    Type: Application
    Filed: November 12, 2022
    Publication date: March 9, 2023
    Inventors: Xiaofu XU, Yonghuang YE, Haizu JIN, Chengdu LIANG, Wenwei CHEN, Quanguo LI
  • Publication number: 20230070894
    Abstract: This application relates to the field of energy storage technologies, and provides a battery, an apparatus, a preparation method of battery, and a preparation apparatus of battery. The battery includes a first battery cell and a second battery cell. The first battery cell includes a first pressure relief mechanism, the second battery cell includes a second pressure relief mechanism, an energy density of the first battery cell is greater than an energy density of the second battery cell, and an area of the first pressure relief mechanism is greater than an area of the second pressure relief mechanism. The apparatus includes the foregoing battery.
    Type: Application
    Filed: November 11, 2022
    Publication date: March 9, 2023
    Inventors: Quanguo LI, Yonghuang YE, Chengdu LIANG, Haizu JIN, Qian LIU, Xia HU
  • Publication number: 20230071423
    Abstract: A battery includes a plurality of battery cells and a support member configured to support the plurality of battery cells. The support member includes a recess. One battery cell of the battery cells extends into and is supported in the recess.
    Type: Application
    Filed: November 16, 2022
    Publication date: March 9, 2023
    Inventors: Xiaofu XU, Yonghuang YE, Haizu JIN, Chengdu LIANG, Qian LIU, Xia HU