Patents Assigned to Technologies Limited
  • Publication number: 20250023205
    Abstract: An electrochemical device includes a housing, an electrode assembly, a first tab, a second tab, and a third tab. The first tab and the second tab are connected to the first electrode plate. A protruding part of the second tab out of the housing is connected to a protruding part of the first tab out of the housing. Along a first direction, a projection of the protruding part of the first tab out of the housing overlaps a projection of the protruding part of the second tab out of the housing. By starting from a first leading end, the first tab is connected to the first electrode plate at a 10% to 60% point of a total length of the first electrode plate, and the second tab is connected to the first electrode plate at a 60% to 100% point of the total length of the first electrode plate.
    Type: Application
    Filed: July 10, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Liujun HUANG
  • Publication number: 20250023025
    Abstract: A negative electrode plate includes a negative current collector and a negative active material layer located on at least one side of the negative current collector. The negative active material layer includes a carbon-containing silicon-oxygen composite particle. An X-ray diffraction pattern of the negative electrode plate satisfies: 1?I1/I2?3, where I1 is an intensity of a highest characteristic diffraction peak corresponding to a diffraction angle 2? of 31.9±0.5°, and I2 is an intensity of a highest characteristic diffraction peak corresponding to 2? of 21.5±0.5°.
    Type: Application
    Filed: September 26, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Wenchen REN
  • Publication number: 20250023187
    Abstract: A battery pack includes a battery housing and a battery cell. The battery housing includes a first wall and a first protruding portion that protrudes beyond an inner surface of the first wall. The first protruding portion and the first wall form a first recessed portion. The battery cell is accommodated in the battery housing. A pressure relief mechanism is disposed at one end, oriented toward the first wall, of the battery cell along a first direction. The end, oriented toward the first wall, of the battery cell is connected to the first protruding portion. Along the first direction, a projection of the pressure relief mechanism is located within a projection of the first recessed portion. Through the above structure, the first protruding portion and the first wall can separate the pressure relief mechanism of one battery cell from that of other battery cells.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Wenbin NONG, Kunlong LI, Pengfei WANG, Guoquan CAI
  • Publication number: 20250019240
    Abstract: A negative electrode active material includes a hard carbon material, the hard carbon material includes a carbon element, a hydrogen element, a nitrogen element, and transition metal elements. Based on a total mass of the hard carbon material, a mass percentage of the carbon element is A %, a mass percentage of the hydrogen element is B %, a mass percentage of the nitrogen element is C %, and a mass percentage of the transition metal elements is D %, and 0.003?B/A?0.050, 0<C?12.0, and 0<D?5.0.
    Type: Application
    Filed: September 27, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Zheng YI
  • Publication number: 20250023058
    Abstract: An electrochemical device, including a positive electrode, where the positive electrode includes a positive electrode current collector, a first protective layer, and a first positive electrode active material layer. The positive electrode current collector includes a first surface and a second surface opposite to each other, and the first protective layer is disposed between the first surface and the first positive electrode active material layer. The first surface includes a first region and a second region, where the first region is provided with the first positive electrode active material layer, and the second region is not provided with the first positive electrode active material layer. An area of the first region is A1 cm2, an area of the second region is A2 cm2, and an area of the first protective layer is A3 cm2, satisfying: 0.5?A3/(A1+A2)?1. The electrochemical device of this application has significantly improved safety performance.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Dongdong HAN, Qingwen ZHANG, Xiaoqian LIU
  • Publication number: 20250023103
    Abstract: An electrochemical apparatus including: a positive electrode, where the positive electrode includes a positive electrode active material layer, and the positive electrode active material layer includes a positive electrode active material, wherein the positive electrode active material includes lithium nickel oxide and an electrolyte. The electrolyte includes fluoroethylene carbonate, where based on a total mass of the electrolyte, a mass percentage of the fluoroethylene carbonate is a %. In this application, a charge cut-off voltage U V of the electrochemical apparatus, a molar ratio x of nickel in the lithium nickel oxide, and the mass percentage a % of the fluoroethylene carbonate in the electrolyte satisfy the following relationship: a ? 2.3 x 0.7 - 6 ? x 0 . 1 ( U - 4 . 2 ) .
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Chunrui XU, Shaoyun ZHOU
  • Publication number: 20250023135
    Abstract: A control device includes a first housing, a first control module, a first conductive path, a second conductive path, a first switch, and a first control member. The first housing includes a first recess. The first control module is close to a first wall. The first control module performs a corresponding control based on a status of an electrically connected battery. The first conductive path is contiguous to the first wall. The second conductive path is contiguous to the first wall. The first switch is contiguous to and electrically connected to the first conductive path and the second conductive path. When viewed along a first direction, the first switch and the first control module are spaced apart from each other. The first control member is outside the first housing. The first control member is connected to the first switch and controls closing and opening of the first switch.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Lu WANG, Haoyu LI
  • Publication number: 20250023094
    Abstract: A negative electrode active material of the electrochemical apparatus includes a first active material and a second active material; where a gram capacity of the first active material is less than that of the second active material; a discharge operating voltage range of the first active material includes a first voltage range that is not greater than an upper limit of a discharge operating voltage of the second active material; the electrochemical apparatus operates at a first discharge cut-off voltage and a first charge cut-off voltage during a first time period; the electrochemical apparatus operates at a second discharge cut-off voltage and a second charge cut-off voltage during a second time period; and the first discharge cut-off voltage and the second discharge cut-off voltage are both within the first voltage range.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Bangkun ZOU, Changming QU
  • Publication number: 20250023116
    Abstract: An electrochemical device includes an electrode assembly and an insulator. The electrode assembly includes a first electrode plate, a second electrode plate and a separator. The first electrode plate includes a first current collector and a first active material layer. The first active material layer is provided with a first connecting edge. A first blank foil region is provided on a first surface of the first electrode plate. The insulator covers a part of the first active material layer and a part of the first blank foil region, respectively.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Rui HUANG
  • Publication number: 20250023052
    Abstract: A binder includes a copolymer. The copolymer is obtained by copolymerization of a mixture including a first monomer of butadiene, a second monomer of styrene, a third monomer, a crosslinking monomer, and an emulsifier; the third monomer includes at least one of (meth)acrylate, acrylonitrile, acrylic acid, a derivative of (meth)acrylate, a derivative of acrylonitrile or a derivative of acrylic acid; and the crosslinking monomer includes at least one of triethyleneglycol diacrylate, N, N-methylenebisacrylamide, ethylene glycol diacrylate, or ethylene glycol dimethacrylate.
    Type: Application
    Filed: September 26, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Baoxiao CHENG
  • Publication number: 20250020727
    Abstract: A method for detecting an internal resistance of a secondary battery, and an electronic device. The method for detecting an internal resistance of a secondary battery includes: charging a secondary battery with a charge current, and in response to a real-time state of charge (SOC) of the secondary battery reaching a target SOC value, stopping charging the secondary battery and keeping for a first duration t; and obtaining data related to the secondary battery during a charge period and a charge stopping period of the secondary battery, and determining the internal resistance of the secondary battery on the basis of the data related to the secondary battery, where the target SOC value includes a plurality of values.
    Type: Application
    Filed: September 27, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Yingjie CHEN, Guoda HE, Guoquan CAI
  • Publication number: 20250023203
    Abstract: An electrode plate assembly includes an electrode plate and a tab. A first through-hole is created on the electrode plate. The first through-hole penetrates the electrode plate along a thickness direction of the electrode plate. The tab includes a main body, a connecting portion, and a constraining portion. Along the thickness direction, the main body and the constraining portion are located on two sides of the electrode plate respectively. The connecting portion runs through the first through-hole and connects the main body and the constraining portion. The electrode plate includes a current collector and a first active material layer. Along the thickness direction, the first active material layer is disposed on one side of the current collector. The current collector and the first active material layer are located between the main body and the constraining portion. The tab is electrically connected to the current collector.
    Type: Application
    Filed: July 10, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Chu HUANG, Sen LIN, Wu MA
  • Publication number: 20250023110
    Abstract: A battery cell includes an electrode assembly, where the electrode assembly is configured as a wound structure; and an accommodating component, where an installation space for accommodating the electrode assembly is provided in the accommodating component; where the electrode assembly includes a positive electrode plate and a negative electrode plate. The negative electrode plate includes a negative electrode terminating section. The negative electrode terminating section is disposed at an outermost circle of the electrode assembly, an insulating layer is provided on an outer side surface of the negative electrode terminating section, and the insulating layer is adhesively fixed to the accommodating component.
    Type: Application
    Filed: July 10, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Chenchen Li
  • Publication number: 20250023042
    Abstract: A positive electrode material, including a substrate and a first region located on a surface of the substrate, where a molar ratio of iodine element to nickel element in the first region is 0.25 to 1.5. In this application, iodine ion lattice doping is introduced into the surface layer of the positive electrode material, so that the structural stability of the positive electrode material under high temperatures and high voltages and the kinetic performance under large-rate charge/discharge conditions are effectively improved, thereby reducing gas production in high-temperature and high-voltage storage and temperature rise under large-rate charge/discharge conditions of the electrochemical device, and improving the comprehensive performance of the electrochemical device.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Shiyang Cheng, Jumpei Shitaba, Jianglin Wu, Qi Wu
  • Publication number: 20250023102
    Abstract: An electrolyte includes fluoroethylene carbonate, where a percentage a of the fluoroethylene carbonate is 0.01% to 5% based on mass of the electrolyte; the positive electrode includes a positive electrode active material, where the positive electrode active material contains element Mn, and a percentage of the element Mn is greater than or equal to 15% based on mass of the positive electrode active material; and the positive electrode active material has a unit reaction area c measured in m2/cm2, where a and c satisfy the following relationship: 0.0006?a/c?6.25, and the unit reaction area is a product of a weight W of the positive electrode active material per unit area and a specific surface area BET of the positive electrode active material.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Junfei LIU, Disheng LAN, Chao TANG, Xiexue PENG
  • Publication number: 20250023018
    Abstract: An electrochemical apparatus, including a positive electrode plate, where the positive electrode plate includes a positive electrode active material layer, and the positive electrode active material layer includes a first material and a second material; and in a fully charged state of the electrochemical apparatus, an XRD diffraction pattern of the positive electrode plate has a diffraction peak A1 of (003) crystal plane of the second material within a range of 18° to 20° and a diffraction peak C1 of (311) crystal plane of the first material within a range of 35° to 37°. The electrochemical apparatus can have prolonged high-temperature cycle life.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Molin Zhou
  • Publication number: 20250023200
    Abstract: An electrode assembly of a battery cell includes a first electrode plate and a first tab. The first tab is electrically connected to the first electrode plate. The first tab is located in a straight region. The first tab at least partially protrudes from a surface of the first electrode plate in a second direction. The first electrode plate includes a first winding terminating section located in the straight region and a first bending section located in a bending region. One end of the first winding terminating section is connected to the first bending section, and another end of the first winding terminating section is a first winding terminating end of the first electrode plate. When viewed in the second direction, the first tab and the first winding terminating section do not overlap.
    Type: Application
    Filed: July 10, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Ning LIU, Fang LV, Jianhui YANG, Chenchen LI
  • Publication number: 20250023090
    Abstract: A battery includes a wound body, and the wound body includes a first electrode plate, a separator, and a second electrode plate that are stacked and wound. The first electrode plate includes a first current collector and a first active material layer provided on the first current collector. The first current collector includes, along a width direction of the first current collector, a first portion provided with a first active material layer and a second portion not provided with the first active material layer. The second portion is located on a side of the first portion perpendicular to a winding direction and forms a plurality of layers of first tab rolls around a central axis of the wound body. At least one layer of the first tab rolls includes a plurality of first tab plates separated from each other.
    Type: Application
    Filed: September 27, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventors: Jing TIAN, Shenzhao QIU
  • Publication number: 20250023029
    Abstract: A positive electrode material, including a matrix and a coating material located on at least a portion of a surface of the matrix. The matrix includes a first compound having a P63mc structure, and the coating material includes a second compound having an R-3m structure. The positive electrode material can have a high gram capacity and cycling stability at a high voltage.
    Type: Application
    Filed: September 27, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Xiaolang LIU
  • Publication number: 20250023026
    Abstract: A positive electrode of an electrochemical device includes a positive current collector and a positive active material layer located on one surface or both surfaces of the positive current collector. The positive active material layer includes a positive electrode material. The positive electrode material includes lithium manganese oxide and lithium iron phosphate. Based on a total mass of the positive electrode material, a mass percent of the lithium iron phosphate is denoted as a, satisfying: 5 wt %?a?20 wt %. Dv50 of the lithium iron phosphate is 0.8 ?m to 2.0 ?m. Dn10 of the lithium iron phosphate is 0.2 ?m to 0.5 ?m. A specific surface area of the lithium iron phosphate is not less than 5 m2/g.
    Type: Application
    Filed: September 26, 2024
    Publication date: January 16, 2025
    Applicant: Ningde Amperex Technology Limited
    Inventor: Xianglong HAN