公开(公告)号：US20230295410A1

公开(公告)日：2023-09-21

申请号：US18324741

申请日：2023-05-26

Applicant: BYD COMPANY LIMITED

Inventor： Jixiang YANG ,  Yongkun CHEN ,  Fulan TANG ,  Rong HAO

IPC: C08L33/26 ,  H01M10/0525 ,  H01M4/04 ,  C08L47/00 ,  C08L39/06

CPC classification number: C08L33/26 ,  H01M10/0525 ,  H01M4/0416 ,  H01M4/0404 ,  C08L47/00 ,  C08L39/06 ,  H01M2004/028

Abstract: A dispersant for a lithium ion battery and a preparation method thereof, a positive slurry, and a lithium ion battery are provided. The dispersant includes a structural unit A derived from a solvophilic monomer, a structural unit B derived from a conjugated diene monomer, and a structural unit C derived from a high-adhesion monomer. The solvophilic monomer includes one or both of N-vinylpyrrolidone and an acrylamide monomer. The high-adhesion monomer includes one or both of an unsaturated nitrile monomer and an acrylate monomer.

公开(公告)号：US20230327118A1

公开(公告)日：2023-10-12

申请号：US18324736

申请日：2023-05-26

Applicant: BYD COMPANY LIMITED

Inventor： Jixiang YANG ,  Yongkun CHEN ,  Fulan TANG ,  Yanan ZHANG ,  Rong HAO

IPC: C08F26/10 ,  C08F36/06 ,  C08F20/06 ,  C08F28/02 ,  H01M4/62 ,  H01M10/0525 ,  C08F36/04 ,  C08F30/02

CPC classification number: H01M4/62 ,  C08F20/06 ,  C08F26/10 ,  C08F28/02 ,  C08F30/02 ,  C08F36/04 ,  C08F36/06 ,  H01M4/623 ,  H01M4/624 ,  H01M10/0525 ,  H01M2004/028

Abstract: A dispersant for a lithium ion battery and a preparation method thereof, a positive slurry, and a lithium ion battery are provided. The dispersant includes a structural unit A derived from N-vinylpyrrolidone, a structural unit B derived from a conjugated diene monomer, and a structural unit C derived from an organic acid monomer. The organic acid monomer includes one or more of an unsaturated sulfonic acid monomer, an unsaturated phosphoric acid monomer, and an unsaturated carboxylic acid monomer.

公开(公告)号：US20210210823A1

公开(公告)日：2021-07-08

申请号：US17059459

申请日：2019-05-17

Applicant: BYD COMPANY LIMITED

Inventor： Wansong YUAN ,  Yi PAN ,  Guihai LIANG ,  Fulan TANG

IPC: H01M50/536 ,  H01M10/0525 ,  H01M50/586 ,  H01M50/59

Abstract: An electrode assembly for a lithium-ion secondary battery and a preparation method thereof, and a lithium-ion secondary battery are disclosed. The electrode assembly comprises an electrode and an electrode post, where an electrode tab is extended from the electrode; a welding connection portion is formed by welding between the electrode tab and the electrode post; the welding connection portion has a bulge welding defect; the surface of the welding connection portion is covered with a polymer protective layer, and the thickness of the polymer protective layer is greater than or equal to the thickness of the bulge welding defect; and the bulge welding defect is embedded in the polymer protective layer.