Invention Grant
- Patent Title: Polymer composite membrane, fabrication method therefor, and lithium-ion battery
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Application No.: US16474992Application Date: 2017-12-01
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Publication No.: US11133559B2Publication Date: 2021-09-28
- Inventor: Jialing Hu , Jun Shan , Long He
- Applicant: BYD COMPANY LIMITED
- Applicant Address: CN Guangdong
- Assignee: BYD COMPANY LIMITED
- Current Assignee: BYD COMPANY LIMITED
- Current Assignee Address: CN Guangdong
- Priority: CN201611262160.9 20161230
- International Application: PCT/CN2017/114316 WO 20171201
- International Announcement: WO2018/121180 WO 20180705
- Main IPC: H01M50/44
- IPC: H01M50/44 ; B01D69/14 ; B01D71/34 ; B01D71/40 ; H01M10/0525 ; H01M50/411 ; H01M50/403

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.
Public/Granted literature
- US20190326577A1 POLYMER COMPOSITE FILM, PREPARATION METHOD THEREFOR, AND LITHIUM-ION BATTERY Public/Granted day:2019-10-24
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