公开(公告)号：US20240356023A1

公开(公告)日：2024-10-24

申请号：US18758089

申请日：2024-06-28

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M4/525 ,  H01M4/623 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2004/021 ,  H01M2004/028

Abstract: An electrochemical device includes: a positive electrode, a negative electrode, and an electrolyte solution. The positive electrode includes a positive current collector and a positive active material layer formed on the positive current collector. The positive active material layer includes a positive active material and a low-density binder. The positive active material includes a first element. The first element includes at least one of aluminum, magnesium, titanium, zirconium, or tungsten. The electrochemical device of this application exhibits improved high-temperature cycle performance and safety.

公开(公告)号：US20240339667A1

公开(公告)日：2024-10-10

申请号：US18748455

申请日：2024-06-20

Applicant: Ningde Amperex Technology Limited

Inventor： Qiao ZENG ,  Jing JIANG ,  Kefei WANG

IPC: H01M10/0585 ,  H01M10/0525 ,  H01M10/0587

CPC classification number: H01M10/0585 ,  H01M10/0525 ,  H01M10/0587

Abstract: A battery cell, including a first electrode plate, a second electrode plate, a separator, and a first electrode tab. The separator is disposed between the first electrode plate and the second electrode plate. The first electrode plate, the second electrode plate, and the separator are wound along a length direction of the first electrode plate. The first electrode tab is located at an end in a width direction of the first electrode plate. In the length direction of the first electrode plate, the first electrode plate includes a first edge, and a first notch is disposed at the first edge.

公开(公告)号：US20240266540A1

公开(公告)日：2024-08-08

申请号：US18618173

申请日：2024-03-27

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG

IPC: H01M4/62 ,  H01M10/0567

CPC classification number: H01M4/62 ,  H01M10/0567

Abstract: An electrochemical device includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive electrode current collector and a positive electrode active material region, an insulation region, and an interaction region, where the positive electrode active material region, the insulation region, and the interaction region are located on the positive electrode current collector. The interaction region is located between the positive electrode active material region and the insulation region and connects to the positive electrode active material region and the insulation region. The positive electrode active material region includes a positive electrode active material. The insulation region includes an inorganic filler. The interaction region includes both the positive electrode active material and the inorganic filler. The electrolyte includes at least one of a cyano-containing compound or a sulfur-oxygen double bond containing compound.

公开(公告)号：US20240258565A1

公开(公告)日：2024-08-01

申请号：US18626447

申请日：2024-04-04

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

IPC: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %≤(X+Y)≤about 11 wt %, about 1≤(X/Y)≤about 6, about 40 wt %≤Z≤about 50 wt %, and about 0.01

公开(公告)号：US20240136535A1

公开(公告)日：2024-04-25

申请号：US18539272

申请日：2023-12-14

Applicant: Ningde Amperex Technology Limited

Inventor： Changchao DU ,  Kefei WANG ,  Feng ZHOU ,  Qingwen ZHANG

IPC: H01M4/66 ,  H01M4/133 ,  H01M10/0525

CPC classification number: H01M4/663 ,  H01M4/133 ,  H01M4/667 ,  H01M10/0525 ,  H01M2004/027

Abstract: An electrochemical device includes a negative electrode sheet. The negative electrode sheet includes a current collector, a first coating layer, and a second coating layer. The first coating layer is located between the current collector and the second coating layer. The second coating layer includes a negative active material. The first coating layer includes a conductive carbon material. The conductive carbon material includes at least one of carbon nanotubes or graphene. Based on a mass of the first coating layer, a mass percent of the conductive carbon material is 20% to 60%. The main material of the first coating layer is at least one of carbon nanotubes or graphene.

公开(公告)号：US20240006597A1

公开(公告)日：2024-01-04

申请号：US18467973

申请日：2023-09-15

Applicant: Ningde Amperex Technology Limited

Inventor： Dou YING ,  Shengqi LIU ,  Kefei WANG

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/62 ,  H01M50/124 ,  H01M50/122

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M4/623 ,  H01M50/124 ,  H01M50/122 ,  H01M2004/021

Abstract: An electrochemical device includes an electrode plate, the electrode plate includes: a first current collector; a first tab protruding from the first current collector; a first active material layer disposed on at least one surface of the first current collector; and an insulation layer disposed along a side edge of the first current collector towards the first tab and abutted against the first active material layer. The insulation layer includes a first region and a second region, the first region is disposed towards the first tab, the second region is disposed away from the first tab and abutted against the first active material layer, and a thickness of the first region of the insulation layer is less than a thickness of the second region of the insulation layer.

公开(公告)号：US20230335794A1

公开(公告)日：2023-10-19

申请号：US17990641

申请日：2022-11-18

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

IPC: H01M10/0566 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/64 ,  H01M4/13

CPC classification number: H01M10/0566 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/64 ,  H01M4/13 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2.2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 2.3, about 5 wt %≤Z≤about 50 wt %, 1 wt %

公开(公告)号：US20230275323A1

公开(公告)日：2023-08-31

申请号：US18300713

申请日：2023-04-14

Applicant: Ningde Amperex Technology Limited

Inventor： Bing JIANG ,  Kefei WANG

IPC: H01M50/491 ,  H01M10/0525 ,  H01M4/64 ,  H01M4/38 ,  H01M4/62 ,  H01M4/58

CPC classification number: H01M50/491 ,  H01M10/0525 ,  H01M4/64 ,  H01M4/386 ,  H01M4/625 ,  H01M4/58 ,  H01M4/622 ,  H01M2004/027

Abstract: An electrode plate includes a current collector and a membrane, where the membrane includes a primer layer provided on a surface of the current collector and an active substance layer provided on a surface of the primer layer, and the primer layer includes a first binder and a first conductive agent; where adhesion between the membrane and the current collector is greater than or equal to 20 N/m. This electrode plate can alleviate problems in the prior art such as easy film fall-off of the electrode plate due to low adhesion of part of the active material close to the surface of the electrode current collector.

公开(公告)号：US20230275226A1

公开(公告)日：2023-08-31

申请号：US18300794

申请日：2023-04-14

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Bing JIANG ,  Qingwen ZHANG ,  Changchao DU

IPC: H01M4/583 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/38

CPC classification number: H01M4/583 ,  H01M4/0404 ,  H01M4/622 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/38 ,  H01M2004/027

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, and an electrolyte, the negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode mixture layer includes a negative electrode active substance, there is specific adhesion strength for the negative electrode active substance, and the electrolyte includes propionate. The electrochemical apparatus has improved high-temperature storage performance and overcharge protection performance.

公开(公告)号：US20220407109A1

公开(公告)日：2022-12-22

申请号：US17885920

申请日：2022-08-11

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 electrochemical device, including an electrode and an electrolyte. The electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z. Wherein about 2 wt %≤(X+Y)≤about 11 wt %, about 0.1≤(X/Y)≤about 8. The electrode including a coating, which including a single-sided sub-coating and a double-sided coating, the electrode with the single-sided sub-coating has an electrode compaction density D1, and the electrode with the double-sided coating has an electrode compaction density D2, where about 0.8≤D1/D2≤about 1.2. The electrolyte and D1/D2 of the electrodes has a significant effect on the cycle performance of the electrochemical device.