公开(公告)号：US20190326577A1

公开(公告)日：2019-10-24

申请号：US16474992

申请日：2017-12-01

Applicant: BYD COMPANY LIMITED

Inventor： Jialing HU ,  Jun SHAN ,  Long HE

IPC: H01M2/16 ,  H01M10/0525 ,  H01M2/14 ,  B01D69/14 ,  B01D71/34 ,  B01D71/40

Abstract: A polymer composite membrane, a method for fabricating same, and a lithium-ion battery including same are provided. The polymer composite membrane includes a porous base membrane and a heat-resistant layer covering at least one side surface of the porous base membrane, the heat-resistant layer includes a plurality of heat-resistant sub-layers sequentially stacked, and pore-blocking temperatures of the heat-resistant sub-layers are sequentially increased from inside to outside; each of the heat-resistant sub-layers includes at least one of a first heat-resistant polymer material and a second heat-resistant polymer material, and each of the heat-resistant sub-layers is separately configured as a fiber network structure; the melting point of the first heat-resistant polymer material is not less than 200° C.; and the melting point of the second heat-resistant polymer material is not less than 100° C.

公开(公告)号：US20210280946A1

公开(公告)日：2021-09-09

申请号：US16319602

申请日：2017-08-15

Applicant: BYD COMPANY LIMITED

Inventor： Lina JIN ,  Jun SHAN ,  Gang HU ,  Long HE

IPC: H01M50/451 ,  H01M50/403 ,  H01M10/0525

Abstract: The present disclosure relates to the field of lithium-ion batteries, and discloses a battery separator and a lithium-ion battery, and preparation methods thereof. The battery separator includes a porous base membrane and a bonding layer attached to at least one side surface of the porous base membrane, wherein the bonding layer contains an acrylate crosslinked polymer and a styrene-acrylate crosslinked copolymer and/or a vinylidene fluoride-hexafluoropropylene copolymer, and the porosity of the bonding layer is 40-65%.

公开(公告)号：US20210218113A1

公开(公告)日：2021-07-15

申请号：US16967398

申请日：2019-01-31

Applicant: BYD COMPANY LIMITED

Inventor： Lina JIN ,  Bowen XUAN ,  Xiaodong CAO ,  Jinxiang WU ,  Jun SHAN ,  Gang HU ,  Long HE

IPC: H01M50/457 ,  H01M50/403 ,  H01M50/446 ,  H01M50/451 ,  H01M50/414 ,  H01M50/434

Abstract: The present disclosure provides a polymer separator and preparation method thereof, and a lithium-ion battery including the polymer separator and preparation method thereof. The polymer separator includes a porous substrate, a hydrophilic blocking layer, and a porous polar polymer bonding layer. The hydrophilic blocking layer is disposed between the porous substrate and the porous polar polymer bonding layer. Pore walls in the porous polar polymer bonding layer are provided with node structures.

公开(公告)号：US20190207190A1

公开(公告)日：2019-07-04

申请号：US16328993

申请日：2017-08-14

Applicant: BYD COMPANY LIMITED

Inventor： Jialing HU ,  Jun SHAN ,  Gang HU ,  Long HE

IPC: H01M2/16 ,  H01M2/14

CPC classification number: H01M2/1666 ,  H01M2/145 ,  H01M2/162 ,  H01M2/1646 ,  H01M2/1653 ,  H01M2/168 ,  H01M2/1686 ,  H01M10/052 ,  H01M10/0525

Abstract: The disclosure provides a polymer composite membrane, a method for preparing same, and a lithium-ion battery including same. The polymer composite membrane includes a polymer base membrane, where the polymer base membrane includes a first surface and a second surface disposed opposite to each other, and the polymer composite membrane further includes a first ceramic layer, a first heat-resistant fiber layer, and a first bonding layer disposed sequentially from inside out on the first surface of the polymer base membrane, where materials of the first heat-resistant fiber layer contain a first polymeric material and a second polymeric material.

公开(公告)号：US20210288381A1

公开(公告)日：2021-09-16

申请号：US16328601

申请日：2017-08-14

Applicant: BYD Company Limited

Inventor： Jialing HU ,  Jun SHAN ,  Jinxiang WU ,  Long HE

IPC: H01M50/417 ,  H01M50/434 ,  H01M50/491 ,  H01M50/454 ,  H01M50/42 ,  H01M50/426

Abstract: The disclosure relates to the field of lithium-ion batteries, and discloses a polymer composite membrane and a method for preparing same. The disclosure further includes a lithium-ion battery for which the foregoing polymer composite membrane is used. The polymer composite membrane includes a porous base membrane and a heat-resistant fiber layer covering at least one side surface of the porous base membrane, where materials of the heat-resistant fiber layer contain a first polymeric material and a second polymeric material.

公开(公告)号：US20190237732A1

公开(公告)日：2019-08-01

申请号：US16319911

申请日：2017-08-14

Applicant: BYD COMPANY LIMITED

Inventor： Jialing HU ,  Ronghua LIU ,  Jun SHAN ,  Long HE

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/0525

CPC classification number: H01M2/1633 ,  B32B2305/30 ,  H01M2/145 ,  H01M2/1653 ,  H01M2/1666 ,  H01M2/168 ,  H01M2/1686 ,  H01M10/052 ,  H01M10/0525

Abstract: The disclosure relates to the field of lithium-ion batteries, and discloses a lithium-ion battery separator, a method for preparing same, and a lithium-ion battery. The lithium-ion battery separator includes: a porous basement membrane, and a heat-resistant layer covering at least one side surface of the porous basement membrane, where the heat-resistant layer contains a high-temperature-resistant polymer and inorganic nanometer particles; and the heat-resistant layer has a fiber-network shaped structure.