公开(公告)号：US20190393467A1

公开(公告)日：2019-12-26

申请号：US16202346

申请日：2018-11-28

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kebing GUO ,  Dongyang GUO ,  Gengjin KONG ,  Xinghua TAO

IPC: H01M2/16 ,  H01M10/0525

Abstract: The present application relates to a separator and an electrochemical device. The present application provides a separator comprising: a porous substrate and a porous layer, wherein the porous layer is disposed on a surface of the porous substrate and comprises inorganic particles and a binder. The porous substrate has an absolute plastic deformation rate in a first direction ranging from about 40% to about 1800%. By using the separator provided in the present application, the safety performance of lithium ion batteries is improved.

公开(公告)号：US20230327290A1

公开(公告)日：2023-10-12

申请号：US18328218

申请日：2023-06-02

Applicant: Ningde Amperex Technology Limited

Inventor： Dongyang GUO ,  Gengjin KONG ,  Kebing GUO ,  Xinghua TAO

IPC: H01M50/46 ,  C08G69/26 ,  H01M50/42 ,  H01M10/0565 ,  H01M50/457 ,  H01M50/434 ,  H01M50/431 ,  H01M50/426 ,  H01M50/423 ,  H01M10/0525 ,  C09D177/10 ,  C09D177/06 ,  C08L77/06 ,  H01M50/451 ,  C08L77/10 ,  C08L77/12

CPC classification number: H01M50/461 ,  C08G69/26 ,  H01M50/42 ,  H01M10/0565 ,  H01M50/457 ,  H01M50/434 ,  H01M50/431 ,  H01M50/426 ,  H01M50/423 ,  H01M10/0525 ,  C09D177/10 ,  C09D177/06 ,  C08L77/06 ,  H01M50/451 ,  C08L77/10 ,  C08L77/12 ,  H01M2300/0082 ,  C08L2203/20

Abstract: A separator and a lithium-ion battery. The separator includes a porous substrate, and a first coating layer arranged on at least one surface of the porous substrate, wherein the first coating layer includes an aromatic polyamide. An aramid coating layer is used; the aromatic polyamide in the aramid coating layer swells or plasticizes under the action of a solvent and a lithium salt in the electrolyte at high temperature or normal temperature, to increase the elongation of the separator, while improving the safety performance of the lithium-ion battery by interaction between the aramid coating layer and the electrode active material or the binder.

公开(公告)号：US20250062497A1

公开(公告)日：2025-02-20

申请号：US18806974

申请日：2024-08-16

Applicant: Ningde Amperex Technology Limited

Inventor： Gengjin KONG ,  Zengbin WEI ,  Xinghua TAO

IPC: H01M50/491 ,  H01M10/42 ,  H01M50/417

Abstract: A secondary battery includes a positive electrode plate, a negative electrode plate, an electrolyte, and a separator. The separator includes a base film, where a pore size distribution of the base film is a bimodal distribution. A pore size on a side of the base film facing the negative electrode plate is larger than a pore size on a side of the base film facing the positive electrode plate. The pore size on the side of the base film facing the negative electrode plate is 60 nm to 500 nm, and the pore size on the side of the base film facing the positive electrode plate is 5 nm to 55 nm. This can improve the fast charging performance of the secondary battery and alleviate lithium precipitation.

公开(公告)号：US20190267595A1

公开(公告)日：2019-08-29

申请号：US16178406

申请日：2018-11-01

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Gengjin KONG ,  Dongyang Guo ,  Xinghua Tao

IPC: H01M2/16 ,  H01M10/0525

Abstract: The present disclosure provides a separator and a lithium ion battery. The separator includes a porous substrate; and a porous layer disposed on at least one surface of the porous substrate. The porous layer includes inorganic particles and a binder, and an iron content in the porous layer is not more than 2100 ppm.