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1. CN111933877 - High-roughness base film for coating and preparation method of base film

Office
China
Application Number 202010612486.X
Application Date 30.06.2020
Publication Number 111933877
Publication Date 13.11.2020
Grant Number 111933877
Grant Date 21.12.2021
Publication Kind B
IPC
H01M 50/434
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
431Inorganic material
434Ceramics
H01M 50/417
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
411Organic material
414Synthetic resins, e.g. .thermoplastics or thermosetting resins
417Polyolefins
H01M 50/491
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
489Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
491Porosity
H01M 50/403
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
403Manufacturing processes of separators, membranes or diaphragms
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
CPC
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
Y02E 60/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
60Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
10Energy storage using batteries
Applicants JIANGSU HOUSHENG NEW ENERGY TECHNOLOGY CO., LTD.
江苏厚生新能源科技有限公司
Inventors WANG CHENGHAO
王成豪
LI ZHENGLIN
李正林
ZHANG LIBIN
张立斌
CHEN ZHAOHUI
陈朝晖
GONG JINGJING
贡晶晶
Agents 常州市科谊专利代理事务所 32225
Title
(EN) High-roughness base film for coating and preparation method of base film
(ZH) 一种涂覆用高粗糙度基膜及其制备方法
Abstract
(EN) The invention discloses a high-roughness base film for coating and a preparation method of the base film. The average pore diameter of the base film ranges from 1nm to 85nm, the porosity ranges from 10% to 85%, the film thickness ranges from 1mu m to 27mu m, and the roughness Ra of the base film is greater than or equal to 0.05 mu m. According to the invention, in the manufacturing process of thebase materia, white oil with branched chains is adopted in the sheet casting process, polyolefin macromolecules are linear molecules, so that after the white oil solvent with the branched chain is mixed with the linear macromolecules, the smoothness of the surface of the diaphragm can be reduced, the roughness of the surface of the diaphragm base material is further improved, the coating performance of the coating surface of the base material is improved, and after ceramic coating, the stripping force of a ceramic coating is greatly improved, and the safety performance of the battery is ensured.
(ZH) 本发明公开了一种涂覆用高粗糙度基膜及其制备方法,该基膜的平均孔径范围:1nm至85nm,孔隙率的范围:10%至85%,膜厚范围:1μm至27μm,其粗糙度Ra≥0.05μm。本发明通过在基材的制作过程中,在铸片工序采用带有支链的白油,由于聚烯烃高分子为线性分子,而带支链的白油溶剂与线性高分子进行混合之后,可以降低隔膜表面的顺滑度,进而提升隔膜基材表面的粗糙度,提高基材涂覆面的涂覆性能,再经过陶瓷涂覆之后,使陶瓷涂层的剥离力得到大幅度的提升,确保了电池的安全性能。
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