公开(公告)号：US20250070256A1

公开(公告)日：2025-02-27

申请号：US18804403

申请日：2024-08-14

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Hui CUI ,  Lilan ZHANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, a separator, and an electrolyte. The electrolyte includes a diluent, an electrolytic salt, and a compound of formula III. The diluent is selected from a group consisting of a compound of formula I and a compound of formula II. A molar mass of the diluent is Mz, and based on a total weight of the electrolyte, a percentage of the diluent is z wt %; a molar mass of the electrolytic salt is Mx, and based on the total weight of the electrolyte, a percentage of the electrolytic salt is x wt %; and a molar mass of the compound of formula III is My, and based on the total weight of the electrolyte, a percentage of the compound of formula III is y wt %, satisfying: 0.4 : 1 ≤ y M ⁢ y : x M ⁢ x ≤ 4 : 1 ; and z M ⁢ z y M ⁢ y + x M ⁢ x ≥ 1.5 .

公开(公告)号：US12237504B2

公开(公告)日：2025-02-25

申请号：US17312208

申请日：2019-12-17

Applicant: Ningde Amperex Technology Limited

Inventor： Daoyi Jiang ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/48 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/583 ,  H01M10/0525

Abstract: An anode material includes a silicon compound SiOx, where x is about 0.5 to 1.5; an oxide MeOy layer, the MeOy layer coating the silicon compound SiOx, where y is about 0.5 to 3; and a carbon layer, the carbon layer coating the MeOy layer. Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co, and Zr. The surface of the MeOy layer adjacent to the carbon layer has an open pore structure, and at least part of the open pore structure is filled with the carbon layer. The anode material improves the cycle performance of the electrochemical device and significantly reduce the impedance of the electrochemical device.

公开(公告)号：US20250062496A1

公开(公告)日：2025-02-20

申请号：US18938632

申请日：2024-11-06

Applicant: Ningde Amperex Technology Limited

Inventor： Chenchen LI ,  Ping HE ,  Daolin LIU

IPC: H01M50/48 ,  H01M50/112 ,  H01M50/141 ,  H01M50/193 ,  H01M50/198

Abstract: An electrochemical device, including a first housing, a second housing, and a first separation piece. The first separation piece is disposed between the first housing and the second housing. A first cavity and a second cavity are disposed on two sides of the first separation piece of the electrochemical device respectively. The first separation piece includes a first substrate layer and a first sealing material layer located on a surface of the first substrate layer. The electrochemical device satisfies: 1.2≤Fs11/F11≤15, where F11 is a peel force between the first sealing material layer and the first substrate layer, and Fs11 is a peel force between the first housing and the first sealing material layer. This arrangement can reduce the risk of bursting the seal interface when the electrochemical device is impacted such as dropped, thereby improving the safety and reliability of the electrochemical device.

公开(公告)号：US20250038367A1

公开(公告)日：2025-01-30

申请号：US18912866

申请日：2024-10-11

Applicant: Ningde Amperex Technology Limited

Inventor： Hongwei HU ,  Xiulan YUAN ,  Jiao TIAN

IPC: H01M50/531 ,  H01M10/04 ,  H01M50/528 ,  H01M50/586

Abstract: A battery cell includes a battery cell body, at least two tabs, a first connector and at least two insulators. The first connector is configured to fasten a tail end of an electrode assembly to an outer surface of the battery cell body; the at least two tabs include a first tab and a second tab, and the at least two insulators include a first insulator and a second insulator, where first ends of the first insulator and the second insulator are all provided on the battery cell body, a second end of the first insulator covers part of the first tab, and a second end of the second insulator covers part of the second tab; and in a width direction of the battery cell body, the first insulator is provided close to the first connector, where at least part of the first insulator is located outside the first connector.

公开(公告)号：US20250038322A1

公开(公告)日：2025-01-30

申请号：US18908904

申请日：2024-10-08

Applicant: Ningde Amperex Technology Limited

Inventor： Xiaofeng LI ,  Zhanyong WANG ,  Peipei GUO ,  Sen LIN

IPC: H01M50/184 ,  H01M10/04 ,  H01M50/105 ,  H01M50/178 ,  H01M50/186

Abstract: An electrochemical device includes a tab, a housing having a main body, and an electrode assembly accommodated in the main body. One end of the tab is connected to the electrode assembly. Another end of the tab extends out from a first lateral face of the main body. The housing includes a tail seal portion and a first side seal portion connected to a second lateral face and a third lateral face of the main body respectively; and a first connecting portion connecting the first side seal portion to the tail seal portion. The third lateral face is located between the second lateral face and the first lateral face. The tail seal portion and the first side seal portion are configured to be folded in a first direction and a second direction respectively.

公开(公告)号：US20250038275A1

公开(公告)日：2025-01-30

申请号：US18784140

申请日：2024-07-25

Applicant: Ningde Amperex Technology Limited

Inventor： Juntao Zhang ,  Xiulan Yuan ,  Shiwei Su ,  Jiao Tian

IPC: H01M10/0587 ,  H01M50/474

Abstract: A secondary battery includes an electrode assembly. Along a winding direction of the electrode assembly, a distance between a first winding start end of a first electrode plate and a first tab is L1, and a distance between a second winding start end of a second electrode plate and a second tab is L2, satisfying: 0.8≤L1/L2≤1.2. The first electrode plate includes a first blank foil region. The first blank foil region is a winding end section of the first electrode plate. The second electrode plate includes a second blank foil region. The second blank foil region is a winding end section of the second electrode plate. The first tab is connected to the first blank foil region, and the second tab is connected to the second blank foil region. A first insulation layer is provided on the first blank foil region.

公开(公告)号：US20250029998A1

公开(公告)日：2025-01-23

申请号：US18897304

申请日：2024-09-26

Applicant: Ningde Amperex Technology Limited

Inventor： Pengyang FENG ,  Jia TANG

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/133 ,  H01M4/66 ,  H01M4/75 ,  H01M10/0525

Abstract: An electrochemical device includes a negative electrode. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer includes a negative active material. The negative active material layer satisfies 0.1≤SA/S002≤0.3, where SA is a peak area value of an A peak corresponding to a diffraction angle 2θ of 42.4° to 43.6° in an XRD pattern of the negative active material layer, and S002 is a peak area value of a 002 peak in the XRD pattern of the negative active material layer. The electrochemical device has excellent cycle performance and kinetic performance in addition to a high gravimetric capacity.

公开(公告)号：US20250029986A1

公开(公告)日：2025-01-23

申请号：US18901353

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Gang PENG ,  Ye LANG ,  Wenyuan LIU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/525 ,  H01M4/58

Abstract: A positive electrode material, including: a matrix and a first coating layer located on surface of the matrix, where based a molar content of metal elements other than Li in the first coating layer, a molar percentage of element Co in the first coating layer is W1; and based on a molar content of metal elements other than Li in the matrix, a molar percentage of element Co in the matrix is W2, where W1>W2; and the first coating layer includes a first region having a spinel phase structure.

公开(公告)号：US20250023205A1

公开(公告)日：2025-01-16

申请号：US18768575

申请日：2024-07-10

Applicant: Ningde Amperex Technology Limited

Inventor： Liujun HUANG

IPC: H01M50/538 ,  H01M10/04 ,  H01M50/105 ,  H01M50/178

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.

公开(公告)号：US20250023106A1

公开(公告)日：2025-01-16

申请号：US18899505

申请日：2024-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Junfei LIU ,  Chao TANG ,  Junqiang HAN

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0568

Abstract: An electrochemical apparatus includes a positive electrode and an electrolyte. The electrolyte includes ethylene carbonate (EC), propylene carbonate (PC), and succinonitrile (SN). The positive electrode includes a positive electrode active material, where the positive electrode active material includes metal element A, and the metal element A includes at least one of the following elements: Mg, Zr, or Al. Based on a mass of the electrolyte, a mass percentage of SN is a %, a mass percentage of EC is b %, and a mass percentage of PC is c %, where k=b/c, 1.25≤k≤6, and a/k≥0.2. Based on a mass of the positive electrode active material, a mass percentage of the metal element A is x %, where 0.01≤x≤1. The foregoing electrochemical apparatus exhibits excellent high-temperature cycling performance and high-temperature interval cycling performance.