公开(公告)号：US11598815B2

公开(公告)日：2023-03-07

申请号：US16236879

申请日：2018-12-31

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Xiaoqing Yu ,  Shi Tan ,  Zhu Feng ,  Zhiwen Xiao

IPC: G01R31/385 ,  G01R31/3835 ,  G01R31/378

Abstract: This application relates to a battery test system and a battery test method. The battery test system according to an embodiment comprises: an extrusion apparatus configured to be disposed on a first surface of a battery; and a pressure apparatus, disposed above the extrusion apparatus, where the pressure apparatus is configured to apply a predetermined force to the battery in predetermined duration through the extrusion apparatus. The battery test system and the battery test method provided in this application are able to more reasonably evaluate the safety of the soft package battery and identify the risk caused by the defect of the soft package battery.

公开(公告)号：US20230049766A1

公开(公告)日：2023-02-16

申请号：US17963564

申请日：2022-10-11

Applicant: Ningde Amperex Technology Limited

Inventor： Jia Tang ,  Lihong He ,  Pengyang Feng ,  Yuansen Xie

IPC: H01M4/04 ,  H01M50/46

Abstract: A negative electrode active material having a specific aspect ratio and sphericity in a cumulative particle volume distribution. When tested by using a dynamic particle image analyzer, when a cumulative particle volume distribution of the negative electrode active material is 10%, an aspect ratio AR10 of the negative electrode active material satisfies 0.4≤AR10≤0.55, and a sphericity S10 of the negative electrode active material satisfies 0.48≤S10≤0.60. The negative electrode active material improves rate performance, dynamics performance, and a deformation problem of the electrochemical apparatus.

公开(公告)号：US20230042859A1

公开(公告)日：2023-02-09

申请号：US17957002

申请日：2022-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Jun He ,  Hui Cui ,  Qiang Zheng ,  Zhanzhao Fang

IPC: H01M10/44 ,  H01M10/42 ,  H01M50/491 ,  H02J7/00

Abstract: A method for enhancing battery cycle performance. The method is applied in a battery and includes: charging, at a first stage, the battery at a first-stage current until reaching a first-stage voltage; and charging, at a second stage, the battery at a second-stage current until reaching a second-stage voltage. The second-stage voltage is greater than the first-stage voltage, and the second-stage current is less than the first-stage current. The battery includes an electrolytic solution containing an organic solvent. The organic solvent includes a chain carboxylate compound. A weight percent of the chain carboxylate compound in the organic solvent is 10% to 70%. This application further provides an electronic device. The method can enhance high-temperature cycle and storage performance of the battery.

公开(公告)号：US20230024456A1

公开(公告)日：2023-01-26

申请号：US17953656

申请日：2022-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Ying SHAO ,  Yibo ZHANG

IPC: H01M50/474 ,  H01M50/486 ,  H01M50/483 ,  H01M50/491 ,  H01M50/536

Abstract: An electrode assembly includes an electrode plate and an embedded tab provided on the electrode plate. A spinning layer is provided on a surface of the electrode plate, the spinning layer covers the surface of the electrode plate and is in contact with the surface of the electrode plate, and the surface of the electrode plate includes a surface of the tab. The spinning layer replaces a conventional separator, and the spinning layer and the electrode plate are integrated as a whole. Especially in a battery structure with the embedded tabs, because the spinning layer is able to isolate metal burrs. The spinning layer replaces the green glue originally affixed on the tab region, thereby eliminating the glue affixed on the tab region.

公开(公告)号：US20230020115A1

公开(公告)日：2023-01-19

申请号：US17953223

申请日：2022-09-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Junhui HOU

IPC: H01M50/536 ,  H01M50/533 ,  H01M4/70 ,  H01M50/172

Abstract: An electrochemical apparatus includes a first electrode plate and a first tab. The first electrode plate includes a current collector and an active material layer disposed on the current collector. The current collector includes a first surface, a first side and a second side opposite to the first side; the first surface is provided with a first blank region and the first tab is electrically connected to the first blank region and protrudes from the first side. A first tab adhesive is provided on the first tab, where the first tab adhesive includes a first adhesive layer, and the first adhesive layer includes a third side facing toward the second side. A minimum distance D1 mm between the third side and the second side and a distance W mm between the first side and the second side satisfy D1

公开(公告)号：US20220416331A1

公开(公告)日：2022-12-29

申请号：US17707314

申请日：2022-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Gang Dong ,  Kai Wu ,  Peipei Guo

IPC: H01M50/102 ,  H01M50/202 ,  H01M50/588 ,  H01M50/136 ,  H01M50/531

Abstract: A battery including a housing assembly, an electrode assembly, and a conductive assembly. The housing assembly includes a first housing fixed on a second housing. The second housing is provided with a cavity and includes a bottom plate. The electrode assembly is disposed in the cavity. The bottom plate contains an elastic portion protruding toward the first housing. The electrode assembly includes a first electrode plate and a second electrode plate stacked together. A surface of the first electrode plate facing back from a center of the electrode assembly contains a first blank foil region uncoated with a first active material and electrically connected to the conductive assembly. A surface of the second electrode plate facing back from the center of the electrode assembly contains a second blank foil region uncoated with a second active material. The elastic portion is electrically connected to the second blank foil region.

公开(公告)号：US11522222B2

公开(公告)日：2022-12-06

申请号：US17064782

申请日：2020-10-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

IPC: H01M10/0566 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %≤(X+Y)≤about 11 wt % . . . (1), about 0.1≤(X/Y)≤about 8 . . . (2)}. The electrolyte further includes at least one selected from the group consisting of a cyclic carbonate ester having a carbon-carbon double bond, a fluorinated chain carbonate ester, a fluorinated cyclic carbonate ester, and a compound having a sulfur-oxygen double bond. The electrolyte is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

公开(公告)号：US20220344646A1

公开(公告)日：2022-10-27

申请号：US17858850

申请日：2022-07-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Tianjun LI

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/04

Abstract: An electrochemical device includes: a positive electrode; a separator; and a negative electrode. The negative electrode includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer includes a negative electrode active material. The negative electrode active material layer includes a first negative electrode active material layer. When the electrochemical device is at a fully discharged state (0% SOC), the first negative electrode active material layer includes a first region and at least one second region. The first region is continuous as a whole, and at least a part of the second region is surrounded by the first region.

公开(公告)号：US20220328832A1

公开(公告)日：2022-10-13

申请号：US17708115

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Hanxiang Zhang

IPC: H01M4/587 ,  H01M10/0569 ,  H01M10/0568

Abstract: An electrochemical device includes a negative active material layer and an electrolyte. The negative active material layer comprises hard carbon. The negative active material layer has a porosity of 20% to 60%. The electrolyte has a conductivity of 8 mS/cm to 14 mS/cm.

公开(公告)号：US20220328828A1

公开(公告)日：2022-10-13

申请号：US17705633

申请日：2022-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Jian WU

IPC: H01M4/583 ,  H01M4/505 ,  H01M4/525

Abstract: An electrochemical device includes an electrode assembly. The electrode assembly includes a positive electrode plate. The positive electrode plate includes a positive current collector and a positive active material layer disposed on the positive current collector. The positive active material layer includes a positive active material and graphene. At least a part of the graphene is disposed on surfaces of particles of the positive active material. The technical solution of this application not only increases a compacted density of the positive active material layer and an energy density of the electrochemical device, but also reduces polarization and increases charging speed of the electrochemical device.