Patents by Inventor Shiwen Wang

Shiwen Wang 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: 20220246903
    Abstract: The present disclosure relates to the technical field of energy storage, and in particular, relates to a positive electrode, a method for preparing the positive electrode and an electrochemical device. The positive electrode includes a current collector and a positive electrode active material layer that contains positive electrode active material and is arranged on at least one surface of the current collector. An inorganic layer having a thickness of 20 nm to 2000 nm is arranged on the surface of the at least one positive electrode active material layer away from the current collector. The inorganic layer is a porous dielectric layer containing no binder, and the inorganic layer has a porosity of 10%˜60%. The positive electrode active material layer according to the present disclosure significantly improves the cycle performance, high-temperature storage performance and safety of the electrochemical device.
    Type: Application
    Filed: April 19, 2022
    Publication date: August 4, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Shiwen WANG, Qisen HUANG, Huafeng HUANG, Chengdu LIANG
  • Patent number: 11379878
    Abstract: The present application provides a wheel rotation imaging device and a wheel rotation imaging intelligent advertising system. In the wheel rotation imaging device, power can be supplied by means of rotation of a wheel with the use of a self-powered unit, so an external power supply is not required; texts, images and videos can be displayed; in addition, a variety of sensors are integrated to acquire operation information of the device in real time, which facilitates the wheel rotation imaging device to adjust the imaging angle and brightness.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: July 5, 2022
    Assignee: CITIC DICASTAL CO., LTD.
    Inventors: Shiwen Xu, Minglei Li, Yao Dai, Weidong Liu, Xi Li, Shaoqian Wang, Liangjian Yue, Dadong Wang, Hongwei Sheng
  • Publication number: 20220209226
    Abstract: This application relates to a negative electrode plate, a secondary battery and apparatus thereof. The secondary battery of the present application comprises a negative electrode plate, the negative electrode plate comprises a composite current collector and a negative electrode active material layer disposed on at least one surface of the composite current collector, the negative electrode active material layer comprises a silicon-based active material, the silicon-based active material accounts for 0.5 wt % to 50 wt % of total mass of the negative electrode active material layer, and the composite current collector comprises a polymer support layer and a metal conductive layer disposed on at least one surface of the polymer support layer, and the composite current collector has a brittleness parameter C ranging from 0.03 to 0.5. The secondary battery and the negative electrode plate achieve good coordination between the current collector and the negative electrode active material layer.
    Type: Application
    Filed: March 18, 2022
    Publication date: June 30, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Cheng LI, Qisen HUANG, Xin LIU, Changliang SHENG, Shiwen WANG, Xianghui LIU, Jia PENG, Mingling LI, Chengdu LIANG
  • Patent number: 11342547
    Abstract: The present disclosure relates to the technical field of energy storage, and in particular, relates to a positive electrode, a method for preparing the positive electrode and an electrochemical device. The positive electrode includes a current collector and a positive electrode active material layer that contains positive electrode active material and is arranged on at least one surface of the current collector. An inorganic layer having a thickness of 20 nm to 2000 nm is arranged on the surface of the at least one positive electrode active material layer away from the current collector. The inorganic layer is a porous dielectric layer containing no binder, and the inorganic layer has a porosity of 10%˜60%. The positive electrode active material layer according to the present disclosure significantly improves the cycle performance, high-temperature storage performance and safety of the electrochemical device.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: May 24, 2022
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Shiwen Wang, Qisen Huang, Huafeng Huang, Chengdu Liang
  • Publication number: 20220123322
    Abstract: Positive current collector, positive plate, electrochemical device and apparatus are disclosed. The positive current collector includes a support layer and a metal conductive layer disposed on the support layer, where a ratio of a density of the metal conductive layer to an intrinsic density of a material of the metal conductive layer is greater than or equal to 0.89, and the material of the metal conductive layer is selected from one or more of aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy. The positive current collector can provide simultaneously both low weight and high electrical performance, thus enabling the electrochemical device to achieve both high weight energy density and electrochemical performance at the same time.
    Type: Application
    Filed: December 22, 2021
    Publication date: April 21, 2022
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Chengdu LIANG, Qisen HUANG, Shiwen WANG
  • Publication number: 20220085380
    Abstract: The present application discloses a negative electrode current collector, a negative electrode plate and an electrochemical device. The negative electrode current collector includes an organic support layer and a copper-based conductive layer disposed on at least one surface of the organic support layer; and a copper-based crystal grain size in the copper-based conductive layer is from 10 nm to 500 nm. The negative electrode current collector provided by the present application has good mechanics properties while having less weight and good electrical conductivity and current collection performance, which can improve preparation yields of the negative electrode current collector, the negative electrode plate and the electrochemical device and their safety and reliability during use, and enables the electrochemical device to have relatively high gravimetric energy density and good electrochemical performance.
    Type: Application
    Filed: November 30, 2021
    Publication date: March 17, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Xin LIU, Qisen HUANG, Shiwen WANG, Changliang SHENG, Jia PENG, Mingling LI, Xianghui LIU
  • Publication number: 20220085383
    Abstract: The present application discloses a negative electrode current collector, a negative electrode plate, an electrochemical device, and an apparatus. The negative electrode current collector includes a polymer material-based support layer and a copper-based conductive layer disposed on at least one surface of the support layer; wherein a thickness D1 of the copper-based conductive layer, a tensile strength T of the support layer, and a thickness D2 of the support layer satisfy a relational formula 0.01?(300×D1)/(T×D2)?0.5. The negative electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the negative electrode current collector, the negative electrode plate and the electrochemical device and their reliability during use, and is beneficial to enabling the electrochemical device to have relatively high electrochemical performance and gravimetric energy density.
    Type: Application
    Filed: November 26, 2021
    Publication date: March 17, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Xin LIU, Shiwen Wang, Qisen Huang, Cheng Li, Mingling Li, Jia Peng, Xianghui Liu
  • Publication number: 20220085361
    Abstract: The present application discloses a negative electrode plate, an electrode assembly, a lithium-ion battery and process for the preparation thereof, and apparatus containing lithium-ion battery. The negative electrode plate includes a negative electrode current collector; a negative electrode active material layer disposed on the negative electrode current collector; a binder-free inorganic dielectric layer disposed on one side of the negative electrode active material layer away from the negative electrode current collector, the inorganic dielectric layer comprising an inorganic dielectric material, and the inorganic dielectric layer including at least a main body portion disposed on the surface of the negative electrode active material layer, the main body portion having a thickness of from 30 nm to 1000 nm; and a lithium metal layer disposed on the surface of the inorganic dielectric layer away from the negative electrode active material layer.
    Type: Application
    Filed: November 29, 2021
    Publication date: March 17, 2022
    Applicant: ContemporaryAmperexTechnologyCo.,Limited
    Inventors: Changliang SHENG, Shiwen WANG, Qisen HUANG, Cheng Li, Chengdu LIANG
  • Publication number: 20220085379
    Abstract: The present application discloses a positive electrode current collector, a positive electrode plate, an electrochemical device, and an apparatus. The positive electrode current collector includes a polymer material-based support layer and an aluminum-based conductive layer disposed on at least one surface of the support layer; a thickness D1 of the aluminum-based conductive layer, a tensile strength T of the support layer, and a thickness D2 of the support layer satisfy a relational formula 0.01?(200×D1)/(T×D2)?0.5, in the formula D1 and D2 are in the same unit, and T is in MPa. The positive electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the positive electrode current collector, the positive electrode plate and the electrochemical device and their reliability during use.
    Type: Application
    Filed: November 29, 2021
    Publication date: March 17, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Xin LIU, Shiwen WANG, Qisen HUANG, Cheng LI, Mingling Ll, Jia PENG, Xianghui LIU
  • Publication number: 20220085384
    Abstract: The present application discloses a composite current collector, an electrode plate and an electrochemical device. The composite current collector includes an organic support layer and a metal conductive layer disposed on at least one surface of the organic support layer; and the composite current collector has a brittleness parameter C of 0.01?C?0.5. The composite current collector provided by the present application has relatively high mechanics and mechanical properties which having good electrical conductivity and current collection performance, which can improve preparation yield of the composite current collector, the electrode plate and the electrochemical device and their reliability during use, and enables the electrochemical device to have relatively high electrochemical performance and gravimetric energy density.
    Type: Application
    Filed: November 30, 2021
    Publication date: March 17, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Xin LIU, Shiwen Wang, Qisen Huang, Cheng Li, Mingling Li, Jia Peng, Xianghui Liu
  • Publication number: 20220052346
    Abstract: A positive current collector, a positive electrode plate, a secondary battery, and an apparatus, the positive current collector comprising a support layer, provided with two opposing surfaces in the thickness direction thereof, and a conductive layer arranged on at least one of the two surfaces of the support layer, wherein the conductive layer has a thickness Di satisfying 300 nm?D1?2 ?m; and when the positive current collector has a the tensile strain of 1.5%, the conductive layer has a sheet resistance growth rate of T?30%. The positive current collector has higher safety performance and meanwhile higher electrical performance, and thus a positive electrode plate and a secondary battery adopting the positive current collector could have higher safety performance and meanwhile higher electro-chemical performance.
    Type: Application
    Filed: October 28, 2021
    Publication date: February 17, 2022
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Shiwen Wang, Qisen Huang
  • Patent number: 11152624
    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: October 19, 2021
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu Liang, Qisen Huang, Shiwen Wang
  • Publication number: 20210313567
    Abstract: The present application discloses a negative electrode plate, an electrode assembly, a lithium ion battery, preparation process thereof, and apparatus containing lithium-ion battery.
    Type: Application
    Filed: June 11, 2021
    Publication date: October 7, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Changliang SHENG, Shiwen Wang, Qisen Huang, Cheng Li, Chengdu Liang
  • Publication number: 20210151770
    Abstract: The present disclosure provides a lithium ion secondary battery, a battery core, a negative electrode plate and an apparatus containing the lithium ion secondary battery. The lithium ion secondary battery includes a battery core and an electrolytic solution, the battery core including a positive electrode plate comprising a positive current collector and a positive active material layer, a separator, and a negative electrode plate comprising a negative current collector and a negative active material layer, wherein the positive current collector and/or the negative current collector are a composite current collector, the composite current collector comprises a polymer-based support layer and a conductive layer disposed on at least one surface of the support layer, and the composite current collector has a thermal conductivity in a range of 0.01 W/(m·K) to 10 W/(m·K), preferably in a range of 0.1 W/(m·K) to 2 W/(m·K).
    Type: Application
    Filed: December 19, 2020
    Publication date: May 20, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Xin LIU, Qisen HUANG, Shiwen WANG, Xianghui LIU, Jia PENG, Mingling LI, Changliang SHENG
  • Publication number: 20210143440
    Abstract: This application discloses a lithium-ion secondary battery. The lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution.
    Type: Application
    Filed: December 16, 2020
    Publication date: May 13, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Xin LIU, Qisen Huang, Shiwen Wang, Xianghui Liu, Jia Peng, Mingling Li, Changliang Sheng
  • Publication number: 20210119220
    Abstract: This application discloses a positive current collector, a positive electrode plate, an electrochemical apparatus, a battery module, a battery pack, and a device. The positive current collector includes a support layer, having two opposite surfaces in a thickness direction of the support layer; and an aluminum-based conductive layer, disposed on at least one of the two surfaces of the support layer. A thickness D1 of the aluminum-based conductive layer is 300 nm?D1?2 ?m; a density of the aluminum-based conductive layer is 2.5 g/cm3 to 2.8 g/cm3; and when a tensile strain of the positive current collector is 2.5%, a sheet resistance growth rate T of the aluminum-based conductive layer is T?10%. The positive current collector provided in this application has a relatively small weight and higher electrical performance, so that the electrochemical apparatus provides a higher weight energy density and higher electrochemical performance.
    Type: Application
    Filed: December 23, 2020
    Publication date: April 22, 2021
    Inventors: Chengdu LIANG, Qisen Huang, Shiwen Wang
  • Publication number: 20210111412
    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 Di of the conductive layer is 300 nm?D1?2 ?m; an elongation at break B of the support layer is 10000%?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 Ti 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: Application
    Filed: December 23, 2020
    Publication date: April 15, 2021
    Applicant: Contemporary Amperex Technology Co., Limited
    Inventors: Chengdu LIANG, Qisen HUANG, Shiwen WANG
  • Patent number: 10868289
    Abstract: The present disclosure relates to the field of energy storage, and in particular to a separator, a method for preparing the separator, and an electrochemical device including the separator. The separator includes a porous substrate. At least one of a porous inorganic layer and an organic particle coating layer is provided on at least one surface of the porous substrate, and a composite layer is provided on at least one surface of the porous substrate. The composite layer includes a porous inorganic layer and an organic particle coating layer sequentially disposed on the surface of the porous substrate. The porous inorganic layer includes an inorganic dielectric material containing no binder. The organic particle coating layer is a coating discontinuously distributed on the porous inorganic layer. The composite layer has a mass of 0.2 g/m2 to 8.4 g/m2 per unit area.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: December 15, 2020
    Inventors: Huafeng Huang, Qisen Huang, Shiwen Wang, Chengdu Liang
  • Patent number: 10862090
    Abstract: The present disclosure relates to a composite separator, a preparation method of the composite separator, and an electrochemical device containing the composite separator. The composite separator includes a substrate and an inorganic layer disposed on at least one surface of the substrate. The substrate is a porous substrate, and the inorganic layer is an inorganic dielectric layer which is a continuous dense film layer with porosity lower than 10% and contains no binder. A thickness of the inorganic layer is 20 nm-1000 nm. An interfacial peeling force between the inorganic layer and the substrate is no less than 30 N/m. The separator of the present application has high wettability with respect to electrolyte, almost no thermal shrinkage, relatively high mechanical strength, and favorable corrosion resistance and durability performances, and thus, a battery using the separator has relatively high thermal stability and nailing strength.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: December 8, 2020
    Inventors: Huafeng Huang, Qisen Huang, Shiwen Wang, Chengdu Liang
  • Patent number: 10848428
    Abstract: The present application provides a method for dynamically allocating resources in an SDN/NFV network based on load balancing. For multimedia services with different demands, a virtual link mapping target, a constraint and a load state of a physical link are associated. A subtask is adaptively mapped to a network node according to the load state of the physical link. The method effectively distinguishes used resources and remaining resources of a physical node and a link to balance the load, and thereby improve the utilization of network resources and avoid occurrence of a local optimum or current optimum. The solution involves performing a subtask mapping to find a server node satisfying constraints for each subtask in a service request. The model for mapping the subtask is min T ? V ? ? Target 1 s . t . ? C 1 , C 2 , C 3 , C 4 .
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: November 24, 2020
    Assignees: STATE GRID HENAN INFORMATION & TELECOMMUNCATION COMPANY, BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS
    Inventors: Wencui Li, Shiwen Wang, Siya Xu, Gangsong Dong, Shaoyong Guo, Yi Jin, Xiong Li, Lei Feng, Jing Shen