CN101051681A - Polymer lithium cell diaphragm and processing method - Google Patents
Polymer lithium cell diaphragm and processing method Download PDFInfo
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- CN101051681A CN101051681A CNA2006100502906A CN200610050290A CN101051681A CN 101051681 A CN101051681 A CN 101051681A CN A2006100502906 A CNA2006100502906 A CN A2006100502906A CN 200610050290 A CN200610050290 A CN 200610050290A CN 101051681 A CN101051681 A CN 101051681A
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- lithium cell
- polymer lithium
- cell diaphragm
- diaphragm
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- 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
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Abstract
The diaphragm is made from main material of polyolefin with 1%-5% Nano powder of SiO2 being added to. Conduction holes near to roundness are distributed on diaphragm face of polymer lithium ion battery formed after one-way stretch evenly. The method includes steps: under control of program setup in advance, hoisting system adds polyolefin and 1%-5% Nano powder of SiO2 (in mass ratio); adding the mixed materials to extruder; extruding the mixed materials under temperature of melting materials at 180-290 deg.C; after cooling to 60-120 deg.C, rolling it to the original flat film, which is sent to one-way stretch machine for stretch formability; speed of one-way stretch is 0.5-0.6 m/min, thickness of diaphragm is 20-35 micros; finally, at 90 deg.C, heat fixing operation is carried out for 15 min.
Description
Technical field
The present invention relates to the processing method of polymer lithium cell diaphragm and polymer lithium cell diaphragm.
Background technology
Lithium ion battery has the specific energy height, and it is long to recycle the life-span, and volume is little, light weight, and characteristics such as security performance height are used widely at aspects such as mobile communication, notebook computers.Along with the development of material science, reduce the cost of lithium ion battery, further promote being expected to go up application in electric motor car (as electric bicycle, battery-operated motor cycle).Polymer Li-ion battery adopts stacked system assembled battery, polymer Li-ion battery yin, yang pole piece and electrolyte membrance are by the compound integral body that becomes of heat, therefore, barrier film is the key component in the lithium ion battery, and the composition and the via in the barrier film of barrier film play an important role to the performance of battery again.But the production ubiquity of existing polymer lithium cell diaphragm complex process, it is long and narrow etc. irregular that production cost height, the via shape of barrier film are, and the transverse and longitudinal ratio is 1: 10, reasons such as voidage is low, pore-size distribution is wider, thus being extensive use of of entire cell influenced.
Summary of the invention
The purpose of this invention is to provide a kind of inserts that in base-material, adds, make the improved polymer lithium cell diaphragm of pass of via.
It is simple that another object of the present invention provides a kind of production process, and cost is economized, and not only is used for mobile communication, and the processing method of the polymer lithium cell diaphragm that can use in electric motor car.
The technical scheme of polymer lithium cell diaphragm of the present invention is: by polyolefine material is that primary raw material is made barrier film, it is characterized in that adding in the polyolefine material 1%-5% nanometer SiO
2Powder is evenly distributed with the via of sub-circular on the face that forms polymer lithium cell diaphragm after the simple tension.The technical program polymer lithium cell diaphragm adds the nanometer SiO according to mass ratio 1%-5% in polyolefine material
2Powder is because SiO
2Adding the space between the fiber in the barrier film is filled, long and narrow aperture is improved, porosity increases, and do not change film strength, the via of even distribution sub-circular on the barrier film face after the simple tension, its advantage is: one, permeability is good, and air permeability Gurley value is less than 40S; Two, mechanical property is good, and lear energy is strong, is difficult for tearing in battery winding, can avoid the micro-short circuit phenomenon of inside battery, is convenient to the assembling of battery simultaneously.
Polymer lithium cell diaphragm of the present invention adds 1%-5% nanometer SiO in its polyolefin raw material
2The shared ratio of powder is a mass ratio.
The processing method of polymer lithium cell diaphragm of the present invention at first under the control of setting program, is added polyolefin and is contained mass ratio 1%-5% nanometer SiO by feeding system
2The mixed material of powder adds in the extruder, when being issued to the raw materials melt temperature, 180 ℃ of-290 ℃ of temperature extrude, and temperature is rolled into original flat film under 60 ℃-120 ℃ after cooling off, again flat film is delivered to drawing and forming in the one-way stretcher, simple tension speed is 0.5 meter-6 meters/minute, membrane thicknesses is the 20-35 micron, carries out thermal finalization 15 minutes at last under 90 ℃ of temperature.
Description of drawings
Fig. 1 is a polymer lithium cell diaphragm structural representation of the present invention.
Embodiment
The present invention relates to the processing method of a kind of polymer lithium cell diaphragm and battery diaphragm, is that primary raw material is made barrier film with the polyolefine material, and its major technology is characterised in that and adds 1%-5% nanometer SiO in the polyolefine material
2Powder is evenly distributed with the via 2 of sub-circular on the face that forms polymer lithium cell diaphragm 1 after the simple tension.Polyolefin such as polypropylene, polyethylene etc. are identical with prior art, as the basis material of system film, nanometer SiO
2Powder is as inorganics filled dose, the via 2 of sub-circular on the face behind the simple tension system film, as shown in Figure 1.Add 1%-5% nanometer SiO in its polyolefin raw material
2The shared ratio of powder is a mass ratio.Press mass ratio and calculate, so the raw material of polyolefine material is 95%-99% relatively.The equipment of concrete system barrier film belongs to prior art, under the control of setting program, is added polyolefin and is contained mass ratio 1%-5% nanometer SiO by feeding system
2The mixed material of powder adds in the extruder, when being issued to the raw materials melt temperature, 180 ℃ of-290 ℃ of temperature extrude, extruded stock temperature after cooling off is rolled into original flat film under 60 ℃-120 ℃, again flat film (temperature also is in 60 ℃ of-120 ℃ of scopes) is sent into drawing and forming in the one-way stretcher that configures successively, simple tension speed is 0.5 meter-6 meters/minute, membrane thicknesses is the 20-35 micron, carries out thermal finalization 15 minutes at last under 90 ℃ of temperature.The processing of barrier film mainly contains feeding system, extrudes, roll-in, simple tension, typing, and temperature requirement is held in support when extruding with roll-in and typing, and temperature requirement and control rate requirement are arranged when simple tension.Production equipments such as described feeding system, extruder, flat film roller press mechanism, one-way stretcher belong to prior art.In polyolefine material, add SiO
2Powder is filled space between the fiber in the barrier film, improves the aperture, changes pass, increases porosity, adds 0.5 meter-6 meters/minute of simple tension speed, just obtains the via of sub-circular.
Below be the parameter index of this battery diaphragm:
| Project | Unit | Numerical value | Scope |
| Thickness | μm | 28 | 20-35 |
| Quality | g/m 2 | 15 | 12-18 |
| Voidage | ％ | 45 | 36-50 |
| Air permeability | L/(s·m 2) | 475 | 300-650 |
Claims (3)
1, polymer lithium cell diaphragm is that primary raw material is made barrier film by polyolefine material, it is characterized in that adding in the polyolefine material 1%-5% nanometer SiO
2Powder is evenly distributed with the via (2) of sub-circular on the face that forms polymer lithium cell diaphragm (1) after the simple tension.
2, polymer lithium cell diaphragm as claimed in claim 1 is characterized in that adding in the polyolefin raw material 1%-5% nanometer SiO
2The shared ratio of powder is a mass ratio.
3, the processing method of polymer lithium cell diaphragm as claimed in claim 1 is characterized in that under the control of setting program, is added polyolefin and is contained mass ratio 1%-5% nanometer SiO by feeding system
2The mixed material of powder adds in the extruder, when being issued to the raw materials melt temperature, 180 ℃ of-290 ℃ of temperature extrude, and temperature is rolled into original flat film under 60 ℃-120 ℃ after cooling off, again flat film is delivered to drawing and forming in the one-way stretcher, simple tension speed is 0.5 meter-6 meters/minute, membrane thicknesses is the 20-35 micron, carries out thermal finalization 15 minutes at last under 90 ℃ of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100502906A CN101051681A (en) | 2006-04-06 | 2006-04-06 | Polymer lithium cell diaphragm and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100502906A CN101051681A (en) | 2006-04-06 | 2006-04-06 | Polymer lithium cell diaphragm and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101051681A true CN101051681A (en) | 2007-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100502906A Pending CN101051681A (en) | 2006-04-06 | 2006-04-06 | Polymer lithium cell diaphragm and processing method |
Country Status (1)
| Country | Link |
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| CN (1) | CN101051681A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367172A (en) * | 2011-10-17 | 2012-03-07 | 中科院广州化学有限公司 | Modified silicon dioxide and high-property lithium ion battery diaphragm and application thereof |
| WO2013159256A1 (en) * | 2012-04-27 | 2013-10-31 | 南通天丰电子新材料有限公司 | Unidirectional stretching method for inducing and producing safety diaphragm with microporous composite structure |
| CN103384936A (en) * | 2011-02-28 | 2013-11-06 | 三洋电机株式会社 | Nonaqueous electrolyte secondary battery |
| CN103427060A (en) * | 2012-05-22 | 2013-12-04 | 颖台科技股份有限公司 | Production method for porous composite membrane |
| CN111883721A (en) * | 2020-07-01 | 2020-11-03 | 湖南翰墨新材料有限公司 | Inorganic nano polymer modified polyolefin lithium battery diaphragm and preparation method thereof |
| CN113659285A (en) * | 2018-07-17 | 2021-11-16 | 河南义腾新能源科技有限公司 | Polypropylene diaphragm for lithium ion battery and preparation method thereof |
-
2006
- 2006-04-06 CN CNA2006100502906A patent/CN101051681A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384936A (en) * | 2011-02-28 | 2013-11-06 | 三洋电机株式会社 | Nonaqueous electrolyte secondary battery |
| CN103384936B (en) * | 2011-02-28 | 2015-10-21 | 三洋电机株式会社 | Nonaqueous electrolytic solution secondary battery |
| CN102367172A (en) * | 2011-10-17 | 2012-03-07 | 中科院广州化学有限公司 | Modified silicon dioxide and high-property lithium ion battery diaphragm and application thereof |
| WO2013159256A1 (en) * | 2012-04-27 | 2013-10-31 | 南通天丰电子新材料有限公司 | Unidirectional stretching method for inducing and producing safety diaphragm with microporous composite structure |
| CN103427060A (en) * | 2012-05-22 | 2013-12-04 | 颖台科技股份有限公司 | Production method for porous composite membrane |
| CN103427060B (en) * | 2012-05-22 | 2015-07-08 | 颖台科技股份有限公司 | Production method for porous composite membrane |
| CN113659285A (en) * | 2018-07-17 | 2021-11-16 | 河南义腾新能源科技有限公司 | Polypropylene diaphragm for lithium ion battery and preparation method thereof |
| CN111883721A (en) * | 2020-07-01 | 2020-11-03 | 湖南翰墨新材料有限公司 | Inorganic nano polymer modified polyolefin lithium battery diaphragm and preparation method thereof |
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Open date: 20071010 |