CN111668432B - Lithium ion battery coating diaphragm and processing technology thereof - Google Patents
Lithium ion battery coating diaphragm and processing technology thereof Download PDFInfo
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- CN111668432B CN111668432B CN202010532511.3A CN202010532511A CN111668432B CN 111668432 B CN111668432 B CN 111668432B CN 202010532511 A CN202010532511 A CN 202010532511A CN 111668432 B CN111668432 B CN 111668432B
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- 239000011248 coating agent Substances 0.000 title claims abstract description 30
- 238000000576 coating method Methods 0.000 title claims abstract description 30
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 20
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000001035 drying Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 18
- -1 polypropylene Polymers 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 7
- 239000004743 Polypropylene Substances 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 7
- 229920000573 polyethylene Polymers 0.000 claims abstract description 7
- 229920001155 polypropylene Polymers 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000013329 compounding Methods 0.000 claims abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000003892 spreading Methods 0.000 claims abstract description 4
- 230000007480 spreading Effects 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 24
- 239000012528 membrane Substances 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000002356 single layer Substances 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Cell Separators (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a lithium ion battery coating diaphragm and a processing technology thereof, comprising a separation diaphragm and a separation layer, wherein the separation diaphragm is made of polypropylene or polyethylene, the separation layer is a coating of dioxide or aluminum oxide, and the processing technology of the lithium ion battery coating diaphragm comprises the following steps of; step two, thermal compounding; step three, film spreading; fourthly, heat treatment; step five, stretching the coiled film; step six, cleaning the diaphragm; step seven, spraying and drying; according to the invention, the traditional mode of heat treatment of the diaphragm is changed, the single-layer diaphragm is subjected to heat treatment, so that uniform heat treatment of the diaphragm is facilitated, and meanwhile, the diaphragm is stretched for multiple times in the process of stretching, so that the rupture of the diaphragm in the process of stretching is avoided, the waste of raw materials for producing the diaphragm is reduced, and the residual dust on the diaphragm before the coating is sprayed is cleaned, so that the falling rate of the coating is reduced, and the quality of the diaphragm is improved.
Description
Technical Field
The invention relates to the technical field of battery coating diaphragms, in particular to a lithium ion battery coating diaphragm and a processing technology thereof.
Background
In the construction of lithium batteries, the separator is one of the critical inner layer components. The performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, directly influences the capacity, circulation, safety performance and other characteristics of the battery, and the diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery. The separator has the main effects of separating the positive electrode from the negative electrode of the battery, preventing the two electrodes from being contacted to form a short circuit, and also has the function of enabling electrolyte ions to pass through, wherein in the process of processing and producing the separator, the separator is usually subjected to heat treatment, but the traditional task treatment process is usually used for carrying out heat treatment on the coiled separator, the mode is unfavorable for carrying out heat treatment on the inside of the coiled separator, in the process of stretching the separator, the traditional mode is usually used for carrying out one-time stretching treatment, the stretching mode is easy to lead to rupture of the separator to cause waste of raw materials, and meanwhile, dust remained on the separator in the process of spraying the separator is easy to lead to falling of spraying paint, so that the quality of the separator is reduced.
Disclosure of Invention
The invention aims to provide a lithium ion battery coating diaphragm and a processing technology thereof, which are used for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the lithium ion battery coating diaphragm comprises a separation diaphragm and a separation layer, wherein the separation diaphragm is made of polypropylene or polyethylene, and the separation layer is a coating of dioxide or aluminum oxide.
A processing technology of a lithium ion battery coating diaphragm comprises the following steps of firstly, forming a sheet; step two, thermal compounding; step three, film spreading; fourthly, heat treatment; step five, stretching the coiled film; step six, cleaning the diaphragm; step seven, spraying and drying;
in the first step, polypropylene or polyethylene is put into an extruder for extrusion, the extrusion temperature is 210-230 ℃, a hanger-shaped vertical die head is adopted for conveying a cooling roller, the extruded raw material is collected by the cooling roller, the temperature of the cooling roller is 90 ℃, the distance between the die head and the cooling roller is 3-6mm, the collected film is blown by cold air at 25 ℃, and then the film is wound at a linear speed of 32 m/min;
in the second step, unreeling the rolled film coiled in the first step onto a heating roller at a speed of 5m/min, hot-pressing the rolled film under the condition of linear pressure of 2kg/cm, and unreeling the rolled film after hot-pressing onto a cooling roller at a speed of 5.4m/min for reeling;
in the third step, the rolled film wound by the cooling roller in the second step is S-shaped wound by the winding roller;
in the fourth step, the rolled film treated in the third step is transported in a hot air circulation furnace to be subjected to heat treatment for 6 hours, the treatment temperature is 125 ℃, and after the treatment is finished, the temperature is reduced to normal temperature at a cooling speed of 20 ℃/h;
in the fifth step, the rolled film after the treatment in the fourth step is stretched by two heating rollers, the temperature of the heating rollers is 45 ℃, the distance between the two heating rollers is 350-400mm, the roller speed of the heating rollers at the supply side is 1.6m/min, the stretched rolled film is then placed in a hot air circulation furnace at 110-125 ℃ and is stretched in a reciprocating manner for three times by the two heating rollers, the temperature of the heating rollers for each stretching is 60 ℃, 80 ℃ and 100 ℃, and then the stretched rolled film is placed on a heating roller at 125-135 ℃ to stay for 25 seconds, and then a diaphragm is obtained;
in the sixth step, the diaphragm obtained in the fifth step is subjected to static electricity removal treatment by a plasma fan to avoid dust residue on the diaphragm, then the treated diaphragm is placed in an atmospheric plasma cleaner for cleaning, and CO is introduced into the atmospheric plasma cleaner 2 ；
In the seventh step, the membrane processed in the sixth step is sprayed with paint through a coater, then the coated membrane is placed in air for drying, then the membrane is transferred to an ultraviolet drying box for drying, then the other surface of the membrane is coated by a coater, then the membrane is transferred to the ultraviolet drying box for re-drying, and the re-drying temperature is 40-50 ℃ and the re-drying time is 20min.
According to the technical scheme, in the first step, the width of the clothes hanger-shaped vertical die head is 1000mm, the gap width is 3mm, and the temperature is 200-210 ℃.
According to the technical scheme, in the second step, the temperature of the heating roller is 125-130 ℃.
According to the technical scheme, in the second step, the temperature of the cooling roller is 50 ℃.
According to the technical scheme, in the third step, the distance between the adjacent coiled films is 5-10mm.
According to the technical scheme, in the fourth step, the heating speed of the hot air circulating furnace is 20 ℃/h.
According to the above technical solution, in the sixth step, CO 2 The gas flow is 15-25ml/min, and the cleaning time is 2-3min.
According to the technical scheme, in the step seven, the air drying time is 10-20min.
According to the technical scheme, in the step seven, the drying temperature is 40-50 ℃ and the drying time is 20min.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the traditional mode of heat treatment of the whole roll of diaphragm is changed into the mode of heat treatment of a single-layer diaphragm, so that uniform heat treatment of the diaphragm is facilitated; meanwhile, the diaphragm is stretched for multiple times in the process of stretching the diaphragm, so that the single stretching mode of the diaphragm in the prior art is changed, the diaphragm is prevented from being broken due to direct stretching, waste of diaphragm production raw materials is reduced, dust remained on the diaphragm before the coating is sprayed is cleaned, the falling rate of the coating is reduced, and the quality of the diaphragm is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a process flow diagram of the present invention;
in the figure: 1. a separation membrane; 2. a separation layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the present invention provides a technical solution: a lithium ion battery coating diaphragm comprises a separation diaphragm 1 and a separation layer 2, wherein the separation diaphragm 1 is made of polypropylene or polyethylene, and the separation layer 2 is a coating of dioxide or aluminum oxide.
A processing technology of a lithium ion battery coating diaphragm comprises the following steps of firstly, forming a sheet; step two, thermal compounding; step three, film spreading; fourthly, heat treatment; step five, stretching the coiled film; step six, cleaning the diaphragm; step seven, spraying and drying;
in the first step, polypropylene or polyethylene is put into an extruder for extrusion, the extrusion temperature is 210-230 ℃, a hanger-shaped vertical die head is adopted for conveying a cooling roller, the width of the hanger-shaped vertical die head is 1000mm, the gap width is 3mm, the temperature is 200-210 ℃, the extruded raw materials are collected by the cooling roller, the temperature of the cooling roller is 90 ℃, the distance between the die head and the cooling roller is 3-6mm, the collected film is blown by cold air at 25 ℃, and then the film is wound at the linear speed of 32 m/min;
in the second step, unreeling the rolled film coiled in the first step onto a heating roller at 5m/min, wherein the temperature of the heating roller is 125-130 ℃, hot-pressing is performed under the condition of linear pressure of 2kg/cm, and then unreeling the rolled film after hot-pressing onto a cooling roller at 5.4m/min for reeling, wherein the temperature of the cooling roller is 50 ℃;
in the third step, the coiled film coiled by the cooling roller in the second step is coiled in an S-shaped mode by the coiling roller, and the distance between the adjacent coiled films is 5-10mm;
in the fourth step, the rolled film treated in the third step is transported in a hot air circulation furnace to be subjected to heat treatment for 6 hours, the treatment temperature is 125 ℃, the heating rate of the hot air circulation furnace is 20 ℃/h, and after the treatment is finished, the rolled film is cooled to the normal temperature at the cooling rate of 20 ℃/h;
in the fifth step, the rolled film after the treatment in the fourth step is stretched by two heating rollers, the temperature of the heating rollers is 45 ℃, the distance between the two heating rollers is 350-400mm, the roller speed of the heating rollers at the supply side is 1.6m/min, the stretched rolled film is then placed in a hot air circulation furnace at 110-125 ℃ and is stretched in a reciprocating manner for three times by the two heating rollers, the temperature of the heating rollers for each stretching is 60 ℃, 80 ℃ and 100 ℃, and then the stretched rolled film is placed on a heating roller at 125-135 ℃ to stay for 25 seconds, and then a diaphragm is obtained;
wherein the above stepsIn the sixth step, the diaphragm obtained in the fifth step is subjected to static electricity removal treatment through a plasma fan, dust residue on the diaphragm is avoided, the treated diaphragm is then placed in an atmospheric plasma cleaning machine for cleaning, and CO is introduced into the atmospheric plasma cleaning machine 2 And CO 2 The gas flow is 15-25ml/min, and the cleaning time is 2-3min;
in the seventh step, the membrane processed in the sixth step is sprayed with paint through a coater, then the coated membrane is placed in air for drying, the air drying time is 10-20min, then the membrane is transferred to an ultraviolet drying box for drying, the drying temperature is 40-50 ℃ and the drying time is 20min, then the other surface of the membrane is coated through the coater, and then the membrane is transferred to the ultraviolet drying box for re-drying, the re-drying temperature is 40-50 ℃ and the re-drying time is 20min.
Based on the above, the invention has the advantages that the diaphragm is stretched for multiple times by changing the single stretching mode of the diaphragm in the prior art, the rupture of the diaphragm caused by directly stretching the diaphragm is avoided, the waste rate of raw materials is reduced, the heat treatment is carried out on a single-layer diaphragm, the non-uniform heat treatment of the diaphragm caused by the heat treatment of the whole-roll diaphragm is avoided, meanwhile, the diaphragm between spray coating layers is cleaned, the falling of the coating layers caused by dust remained on the surface of the diaphragm is avoided, and the quality of the diaphragm is improved.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present invention is not intended to be limiting, but rather, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A processing technology of a lithium ion battery coating diaphragm comprises the following steps of firstly, forming a sheet; step two, thermal compounding; step three, film spreading; fourthly, heat treatment; step five, stretching the coiled film; step six, cleaning the diaphragm; step seven, spraying and drying; the lithium ion battery coating diaphragm comprises a separation diaphragm (1) and a separation layer (2), wherein the separation diaphragm (1) is made of polypropylene or polyethylene, and the separation layer (2) is a coating of dioxide or aluminum oxide, and is characterized in that:
in the first step, polypropylene or polyethylene is put into an extruder for extrusion, the extrusion temperature is 210-230 ℃, a hanger-shaped vertical die head is adopted for conveying a cooling roller, the extruded raw material is collected by the cooling roller, the temperature of the cooling roller is 90 ℃, the distance between the die head and the cooling roller is 3-6mm, the collected film is blown by cold air at 25 ℃, and then the film is wound at a linear speed of 32 m/min;
in the second step, unreeling the rolled film coiled in the first step onto a heating roller at a speed of 5m/min, hot-pressing the rolled film under the condition of linear pressure of 2kg/cm, and unreeling the rolled film after hot-pressing onto a cooling roller at a speed of 5.4m/min for reeling;
in the third step, the rolled film wound by the cooling roller in the second step is S-shaped wound by the winding roller;
in the fourth step, the rolled film treated in the third step is transported in a hot air circulation furnace to be subjected to heat treatment for 6 hours, the treatment temperature is 125 ℃, and after the treatment is finished, the temperature is reduced to normal temperature at a cooling speed of 20 ℃/h;
in the fifth step, the rolled film after the treatment in the fourth step is stretched by two heating rollers, the temperature of the heating rollers is 45 ℃, the distance between the two heating rollers is 350-400mm, the roller speed of the heating rollers at the supply side is 1.6m/min, the stretched rolled film is then placed in a hot air circulation furnace at 110-125 ℃ and is stretched in a reciprocating manner for three times by the two heating rollers, the temperature of the heating rollers for each stretching is 60 ℃, 80 ℃ and 100 ℃, and then the stretched rolled film is placed on a heating roller at 125-135 ℃ to stay for 25 seconds, and then a diaphragm is obtained;
in the sixth step, the diaphragm obtained in the fifth step is subjected to static electricity removal treatment by a plasma fan to avoid dust residue on the diaphragm, then the treated diaphragm is placed in an atmospheric plasma cleaner for cleaning, and CO is introduced into the atmospheric plasma cleaner 2 ；
In the seventh step, the membrane processed in the sixth step is sprayed with paint through a coater, then the coated membrane is placed in air for drying, then the membrane is transferred to an ultraviolet drying box for drying, then the dried membrane is used for coating the other surface of the membrane through the coater, then the membrane is transferred to the ultraviolet drying box for re-drying, the re-drying temperature is 40-50 ℃, and the re-drying time is 20min.
2. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the first step, the width of the clothes hanger-shaped vertical die head is 1000mm, the gap width is 3mm, and the temperature is 200-210 ℃.
3. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the second step, the temperature of the heating roller is 125-130 ℃.
4. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the second step, the temperature of the cooling roller is 50 ℃.
5. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the third step, the distance between the adjacent coiled films is 5-10mm.
6. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the fourth step, the temperature rising speed of the hot air circulating furnace is 20 ℃/h.
7. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the sixth step, CO 2 The gas flow is 15-25ml/min, and the cleaning time is 2-3min.
8. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the seventh step, the air drying time is 10-20min.
9. The process for manufacturing the lithium ion battery coating diaphragm according to claim 1, wherein the process comprises the following steps: in the seventh step, the drying temperature is 40-50 ℃ and the drying time is 20min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010532511.3A CN111668432B (en) | 2020-06-11 | 2020-06-11 | Lithium ion battery coating diaphragm and processing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010532511.3A CN111668432B (en) | 2020-06-11 | 2020-06-11 | Lithium ion battery coating diaphragm and processing technology thereof |
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| CN111668432B true CN111668432B (en) | 2023-05-19 |
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| CN112133870A (en) * | 2020-09-24 | 2020-12-25 | 湖南省凯纳方科技有限公司 | Preparation process of battery diaphragm for increasing ion exchange capacity |
| CN112216931A (en) * | 2020-09-30 | 2021-01-12 | 广东嘉尚新能源科技有限公司 | Lithium ion battery diaphragm with hydrophilic surface layer and preparation method thereof |
| CN111978580B (en) * | 2020-10-23 | 2021-01-08 | 河南银金达新材料股份有限公司 | Polyethylene film without coating fragments and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103753936A (en) * | 2014-01-17 | 2014-04-30 | 成都芝田高分子材料有限公司 | Lithium battery diaphragm compound device and compound method thereof |
| WO2019169210A1 (en) * | 2018-03-02 | 2019-09-06 | Celgard, Llc | Microporous membranes, battery separator, and methods for making and using the same |
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| DE102011122658A1 (en) * | 2011-12-30 | 2013-07-04 | Li-Tec Battery Gmbh | Process and system for the production of electrochemical cells for electrochemical energy storage |
| CN103811704B (en) * | 2014-02-28 | 2016-03-09 | 苏州捷力新能源材料有限公司 | A kind of preparation method of temp. resistance microporous film |
| CN203983415U (en) * | 2014-03-27 | 2014-12-03 | 合肥国轩高科动力能源股份公司 | In a kind of electric core winding process, remove barrier film electrostatic equipment |
| CN106784530A (en) * | 2017-01-13 | 2017-05-31 | 中国科学技术大学 | A kind of polyethylene micropore barrier film and preparation method thereof |
| CN107180938B (en) * | 2017-04-18 | 2020-01-17 | 上海大学 | Method for forming lithium ion battery diaphragm nano coating |
| CN210676215U (en) * | 2019-10-18 | 2020-06-05 | 江苏安瑞达新材料有限公司 | Dust removal system for lithium battery diaphragm multilayer compound machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753936A (en) * | 2014-01-17 | 2014-04-30 | 成都芝田高分子材料有限公司 | Lithium battery diaphragm compound device and compound method thereof |
| WO2019169210A1 (en) * | 2018-03-02 | 2019-09-06 | Celgard, Llc | Microporous membranes, battery separator, and methods for making and using the same |
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