Patents by Inventor Yingjie Guan

Yingjie Guan 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).

  • Patent number: 11949099
    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: Grant
    Filed: February 10, 2023
    Date of Patent: April 2, 2024
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Chengdu Liang, Yongchao Liu, Na Liu, Yingjie Guan, Qisen Huang, Wei Fu
  • Patent number: 11916229
    Abstract: A positive electrode active material and a preparation method therefor, a positive electrode plate containing same, a secondary battery, and a power consuming device are provided. The positive electrode active material has a core-shell structure, comprising an inner core and a shell coating the inner core, wherein the inner core comprises Li1+xMn1?yAyP1?zRzO4, and the shell comprises a first coating layer coating the inner core, and a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The positive electrode active material of the present application enables the secondary battery to have a higher energy density, and a good rate performance, cycling performance and safety performance.
    Type: Grant
    Filed: June 15, 2023
    Date of Patent: February 27, 2024
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Qingyan Ma, Yuzhen Zhao, Yingjie Guan, Yan Wen, Qisen Huang
  • Publication number: 20230420661
    Abstract: Provided are a negative electrode active material and a preparation method thereof, as well as a secondary battery having the same, and a battery module, a battery pack and an electrical apparatus. The negative electrode active material of the present application comprises: a silicon inner core; a first cladding layer clad on the surface of the silicon inner core, wherein the first cladding layer is a carbon-containing layer; and a second cladding layer clad on the surface of the first cladding layer, wherein the second cladding layer is an elemental sulfur layer. By using the negative electrode active material of the present application, the energy density of the secondary battery can be improved, and the cycle life can be prolonged.
    Type: Application
    Filed: August 31, 2023
    Publication date: December 28, 2023
    Inventors: Yuzhen Zhao, Yingjie Guan, Qingyan Ma, Yan Wen, Qisen Huang
  • Patent number: 11855289
    Abstract: The present application provides a negative electrode active material, a process, a battery, a battery module, a battery pack and an apparatus related to the same. The negative electrode active material comprises a core material and a polymer modified coating on at least a part of a surface of core material; wherein the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material; the negative electrode active material has a weight loss rate satisfying 0.2%?weight loss rate?2% in a thermogravimetric analysis test wherein temperature is elevated from 25° C. to 800° C. under a non-oxidizing inert gas atmosphere. The present application can reduce damage to the surface structure of the negative electrode active material, reduce loss of active ions and capacity, meanwhile can well improve coulomb efficiency and cycle performance of the battery.
    Type: Grant
    Filed: December 28, 2021
    Date of Patent: December 26, 2023
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Yuzhen Zhao, Yingjie Guan, Yan Wen, Qisen Huang
  • Publication number: 20230352674
    Abstract: The present application provides a positive electrode active material, a preparation method therefor, a positive electrode plate, a secondary battery and a power consuming device containing same. The positive electrode active material has a core-shell structure, including an inner core and a coating layer coating at least a part of the inner core, wherein the inner core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, and the coating layer comprising a polymer which comprises one or more of plant polysaccharide, marine polysaccharide and their respective derivatives. The positive electrode active material of the present application enables a secondary battery to have a high energy density as well as significantly improved rate performance, cycling performance and/or high-temperature stability.
    Type: Application
    Filed: July 5, 2023
    Publication date: November 2, 2023
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Qingyan Ma, Yingjie Guan, Yuzhen Zhao, Yan Wen, Qisen Huang
  • Publication number: 20230343938
    Abstract: A positive electrode active material has a core-shell structure, which includes an inner core and a coating layer coating at least part of the inner core. The inner core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, and the coating layer includes a polymer which includes one or more selected from polysiloxanes with linear structure and polysiloxanes with ring structure.
    Type: Application
    Filed: June 27, 2023
    Publication date: October 26, 2023
    Inventors: Qingyan MA, Yuzhen ZHAO, Yingjie GUAN, Yan WEN, Qisen HUANG
  • Publication number: 20230335723
    Abstract: A positive electrode active material and a preparation method therefor, a positive electrode plate containing same, a secondary battery, and a power consuming device are provided. The positive electrode active material has a core-shell structure, comprising an inner core and a shell coating the inner core, wherein the inner core comprises Li1+xMn1?yAyP1?zRzO4, and the shell comprises a first coating layer coating the inner core, and a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The positive electrode active material of the present application enables the secondary battery to have a higher energy density, and a good rate performance, cycling performance and safety performance.
    Type: Application
    Filed: June 15, 2023
    Publication date: October 19, 2023
    Inventors: Qingyan Ma, Yuzhen Zhao, Yingjie Guan, Yan Wen, Qisen Huang
  • Publication number: 20230327091
    Abstract: A positive electrode active material has a core-shell structure including an inner core and a shell coating the inner core. The inner core has a chemical formula of Li1+xMn1?yAyP1?zRzO4. The shell includes a first coating layer coating the inner core, a second coating layer coating the first coating layer, a third coating layer coating the second coating layer, and a fourth coating layer coating the third coating layer.
    Type: Application
    Filed: June 19, 2023
    Publication date: October 12, 2023
    Inventors: Qingyan MA, Yingjie GUAN, Yuzhen ZHAO, Yan WEN, Qisen HUANG
  • 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
  • Patent number: 11695112
    Abstract: The present application provides a negative electrode active material, a process for preparing the same, and a secondary battery, a battery module, a battery pack and an apparatus related the same. The negative electrode active material comprises a core material and a polymer-modified coating layer on at least a part of a surface of the core material, the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material, the polymer-modified coating layer comprises sulfur element and carbon element, the sulfur element has a mass percentage of from 0.2% to 4% in the negative electrode active material, the carbon element has a mass percentage of from 0.5% to 4% in the negative electrode active material, and the polymer-modified coating layer comprises a —S—C— bond.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: July 4, 2023
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Yuzhen Zhao, Yingjie Guan, Yan Wen, Qisen Huang
  • 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: 20230146274
    Abstract: The present application provides a silicon carbon negative electrode material, a negative electrode sheet including the same, a secondary battery, a battery module, a battery pack and a power consumption apparatus. A battery composed of a negative electrode prepared by the silicon carbon negative electrode material in the present application as a working electrode, metal lithium as a counter electrode and an electrolyte containing a lithium ion conductive substance may be charged and discharged, and in a case of drawing a relationship graph between a differential value dQ/dV obtained by differentiating a charging and discharging capacity Q by a working electrode potential V and the working electrode potential V, when energizing the negative electrode material in a direction of delithiation, a ratio of a maximum Y of dQ/dV between 400-480 mV to a maximum X of dQ/dV between 200-255 mV may be in a range of 3.5 to 15.
    Type: Application
    Filed: August 16, 2022
    Publication date: May 11, 2023
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Yingjie GUAN, Yuzhen ZHAO, Qingyan MA, Yan WEN, Qisen HUANG, Fenggang ZHAO
  • 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: 11522181
    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: Grant
    Filed: July 22, 2020
    Date of Patent: December 6, 2022
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Yingjie Guan, Yuzhen Zhao, Yan Wen, Qisen Huang
  • Publication number: 20220344649
    Abstract: This application provides a silicon-based material, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an apparatus associated therewith. The silicon-based material includes a core structure and a coating layer provided on at least partial surface of the core structure, where the core structure includes both a silicon phase and a lithium metasilicate phase, and a particle size P of the lithium metasilicate phase is ?30 nm. The silicon-based material of this application can not only increase energy density of a secondary battery with the silicon phase, but also improve structural stability and chemical stability of the silicon-based material, so that the secondary battery can deliver satisfactory and balanced cycling performance and first-cycle coulombic efficiency in overall.
    Type: Application
    Filed: July 11, 2022
    Publication date: October 27, 2022
    Inventors: Xin LIU, Qisen HUANG, Cheng LI, Yingjie GUAN, Yan WEN, Xianghui LIU
  • Patent number: 11476457
    Abstract: The present application discloses a negative active material, a method for preparing the same, and related secondary batteries, battery modules, battery packs and apparatus. The negative active material includes a core material and a polymer-modified coating layer on at least a part of its surface; the core material includes one or more of silicon-based materials and tin-based materials; the coating layer includes sulfur element and carbon element; in the Raman spectrum of the negative active material, the negative active material has scattering peaks at the Raman shifts of 900 cm?1˜960 cm?1, 1300 cm?1˜1380 cm?1 and 1520 cm?1˜1590 cm?1, respectively, in which the scattering peak at the Raman shift of 900 cm?1˜960 cm?1 has a peak intensity recorded as Il, the scattering peak at the Raman shift of 1520 cm?1˜1590 cm?1 has a peak intensity recorded as IG, and Il and IG satisfy 0.2?Il/IG?0.8.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: October 18, 2022
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Yuzhen Zhao, Yingjie Guan, Yan Wen, Qisen Huang
  • Patent number: 11420875
    Abstract: This application belongs to the field of energy storage technology, and specifically discloses a negative active material including SiOx particles and a modified polymer coating layer covering the SiOx particles, in which 0<x<2; wherein the negative active material has a peak intensity I1 at the Raman shift ranging from 280 cm?1 to 345 cm?1, a peak intensity 12 at the Raman shift ranging from 450 cm?1 to 530 cm?1, and a peak intensity 13 at the Raman shift ranging from 900 cm?1 to 960 cm?1, and I1, I2 and I3 satisfy 0.1?I1/I2?0.6, and 0.2?I3/I2?1.0. This application also discloses a method for preparing a negative active material and related secondary batteries, battery modules, battery packs and apparatus.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: August 23, 2022
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Yuzhen Zhao, Yingjie Guan, Yan Wen, Qisen Huang
  • Publication number: 20220231279
    Abstract: The present application discloses a negative active material, a method for preparing the same, and related secondary batteries, battery modules, battery packs and apparatus. The negative active material includes a core material and a polymer-modified coating layer on at least a part of its surface; the core material includes one or more of silicon-based materials and tin-based materials; the coating layer includes sulfur element and carbon element; in the Raman spectrum of the negative active material, the negative active material has scattering peaks at the Raman shifts of 900 cm?1˜960 cm?1, 1300 cm?1˜1380 cm?1 and 1520 cm?1˜1590 cm?1, respectively, in which the scattering peak at the Raman shift of 900 cm?1˜960 cm?1 has a peak intensity recorded as Il, the scattering peak at the Raman shift of 1520 cm?1˜1590 cm?1 has a peak intensity recorded as IG, and Il and IG satisfy 0.2?Il/IG?0.8.
    Type: Application
    Filed: January 27, 2022
    Publication date: July 21, 2022
    Applicant: Contemporary Amperex Technology Co.,Limited
    Inventors: Chengdu LIANG, Yuzhen ZHAO, Yingjie GUAN, Yan Wen, Qisen HUANG
  • Publication number: 20220153598
    Abstract: This application belongs to the field of energy storage technology, and specifically discloses a negative active material including SiOx particles and a modified polymer coating layer covering the SiOx particles, in which 0<x<2; wherein the negative active material has a peak intensity I1 at the Raman shift ranging from 280 cm?1 to 345 cm?1, a peak intensity 12 at the Raman shift ranging from 450 cm?1 to 530 cm?1, and a peak intensity 13 at the Raman shift ranging from 900 cm?1 to 960 cm?1, and I1, I2 and I3 satisfy 0.1?I1/I2?0.6, and 0.2?I3/I2?1.0. This application also discloses a method for preparing a negative active material and related secondary batteries, battery modules, battery packs and apparatus.
    Type: Application
    Filed: January 27, 2022
    Publication date: May 19, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu LIANG, Yuzhen ZHAO, Yingjie GUAN, Yan WEN, Qisen HUANG
  • Publication number: 20220144648
    Abstract: The present application discloses a silicon-oxygen compound, a method for preparation thereof, and a secondary battery, a battery module, a battery pack and an apparatus related thereto. The silicon-oxygen compound includes both manganese element and a copper element, a content of the manganese element is from 20 ppm to 500 ppm, and a mass ratio of the manganese element to the copper element is from 1 to 18.
    Type: Application
    Filed: January 25, 2022
    Publication date: May 12, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu LIANG, Yingjie GUAN, Yuzhen ZHAO, Yan WEN, Qisen HUANG