CN202205831U - Preparation system of diaphragm of power lithium ion battery - Google Patents
Preparation system of diaphragm of power lithium ion battery Download PDFInfo
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- CN202205831U CN202205831U CN2011203199786U CN201120319978U CN202205831U CN 202205831 U CN202205831 U CN 202205831U CN 2011203199786 U CN2011203199786 U CN 2011203199786U CN 201120319978 U CN201120319978 U CN 201120319978U CN 202205831 U CN202205831 U CN 202205831U
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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 utility model provides a preparation system of a diaphragm of a power lithium ion battery, which comprises a mixing device, a first production line subsystem and a second production line subsystem. When the first production line subsystem and the second production line subsystem are connected with the mixing device respectively, the first production line subsystem and the second production line subsystem are the same and respectively comprise an extrusion device, a cooling molding device, a bidirectional stretching device, an extraction device, a transverse stretching device, a hot processing device and a wrap-up device. When the extrusion device is connected with the mixing device, the extrusion device, the cooling molding device, the bidirectional stretching device, the extraction device, a transverse stretching device, the hot processing device and the wrap-up device are connected sequentially. The technical problems of big usage amount and high cost of equipment for producing the diaphragm of the lithium ion battery in the prior art are solved.
Description
Technical field
The utility model relates to a kind of preparation system, relates in particular to a kind of preparation system of power lithium-ion battery barrier film.
Background technology
The chargeable lithium ion secondary cell has the characteristic of high-energy-density, long circulation life, memory-less effect, have again safety, reliable and can fast charging and discharging etc. advantage, thereby become the focus of novel power supply technical research in recent years.Because lithium ion battery is the free of contamination secondary cell of environmental type, meet the big growth requirement in countries nowadays energy environment protection aspect, increase sharply in the use amount of all trades and professions.Secondary lithium battery is also being brought into use aspect some high power batteries such as electric motor car, electric bicycle except that being widely used in digital electronic goods such as the daily mobile phone of knowing, notebook computer and MP3 in recent years at present.From calendar year 2001, global lithium ion battery output is increasing progressively rapidly with annual 40% speed.
Barrier film is the important component part of lithium ion battery, and its performance has determined interfacial structure, internal resistance of battery etc., directly influences the characteristic such as capacity, cycle performance of battery.The barrier film of excellent performance has important effect to the combination property that improves battery.But preparation technology in the past can cause the inhomogeneous and membrane thickness unevenness of lithium ion battery separator pore-forming, thereby influences the quality of lithium ion battery.
Chinese patent number is that 200810042043.0 utility model patent has been announced a kind of lithium ion battery separator preparation system, and the preparation system of this lithium ion battery separator comprises agitating device, extrusion device, cooling forming device, biaxial tension device, extraction equipment, annealing device, cuts packing device.And agitating device, extrusion device, cooling forming device, biaxial tension device, extraction equipment, annealing device, cut packing device and connect successively, this system adopts the system of processing of one continuous line, can increase the quantity and the cost of process equipment like this.
The utility model content
The purpose of the utility model is to provide a kind of preparation system of power lithium-ion battery barrier film, to solve big, the equipment cost technical problems of high of the equipment use amount of producing lithium ion battery separator in the prior art.
In order to achieve the above object; The utility model provides a kind of preparation system of power lithium-ion battery barrier film; Comprise agitating device, the first processing line subsystem and the second processing line subsystem; Said first processing line subsystem and the said second processing line subsystem are connected to after the said agitating device; The said first processing line subsystem is identical with the said second processing line subsystem; Comprise extrusion device, cooling forming device, biaxial tension device, extraction equipment, cross directional stretch device, annealing device and wrap-up respectively, said extrusion device is connected after the said agitating device, and said extrusion device, cooling forming device, biaxial tension device, extraction equipment, cross directional stretch device, annealing device, wrap-up connect successively.Preferably; The strutting piece that said cross directional stretch equipment comprises in order to the clamping device that clamps the barrier film after the extraction, make track that clamping device moves forward and clamping device and track are supported, clamping device comprises left clamping unit and the right clamping unit that is positioned at the barrier film both sides.
Preferably, track length is 20 ~ 30 meters, and track becomes an oblique angle less than 5 ° outwards to depart from the diaphragm movement direction.
Preferably, said cooling forming device comprises some groups of refrigerating modules, and every pack module comprises two chill rolls.
Preferably, said cooling forming device comprises 6 groups of refrigerating modules, and under the operating state, the temperature of every group of refrigerating module is different.
With respect to prior art, the utlity model has following advantage:
1, the utility model connects two identical processing lines at the back at agitating device and processes simultaneously, and promptly the front of two processing lines is used agitating device such as mixer jointly, has reduced the use amount of equipment, has reduced the cost of equipment;
2, behind the use cross directional stretch equipment, heat treated temperature also will reduce, and heat treatment temperature can be reduced to 60～150 ℃ by original 100～160 ℃, save energy consumption, reduces cost;
3, through adding after the cross directional stretch process stretches to barrier film, can produce the wideer lithium battery diaphragm of width.
Description of drawings
Fig. 1 is that the preparation of a kind of power lithium-ion battery barrier film of the utility model connects sketch map;
Fig. 2 is the cross directional stretch structure drawing of device.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
At first, the preparation method of the power lithium-ion battery barrier film that the utility model is corresponding is described once, the preparation method may further comprise the steps:
One, with in ultra high molecular polyethylene, antioxidant and the mineral oil proportioning adding by a certain percentage mixer raw material fully being stirred;
Two, flow into first processing line and second processing line is processed respectively simultaneously by the step 1 mixture after being mixed through dividing;
Get into the processing of the mixture of first processing line:
(1) the mixture input double screw extruder heating that gets into first processing line is extruded continuously, forms substrate;
(2) substrate of extruding from double screw extruder carries out cooling forming through one group of chill roll group;
(3) carry out horizontal stroke, indulge the two-way simultaneous stretching through the substrate of biaxial tension equipment, make substrate be drawn into barrier film cooling forming;
(4) use the alkanes extractant, barrier film is extracted the mineral oil in the barrier film through extraction tank;
(5) barrier film after will extracting is finalized the design, stretches, is rectified a deviation barrier film, and guarantee the volatilization of the remaining extract on the barrier film through cross directional stretch equipment;
(6) barrier film is heat-treated;
(7) the finished product barrier film after the heat treatment is carried out rolling;
At last, the finished product barrier film is cut and packed.
Get into the processing of the mixture of second processing line:
(1) the mixture input double screw extruder heating that gets into second processing line is extruded continuously, forms substrate;
(2) substrate of extruding from double screw extruder carries out cooling forming through one group of chill roll group;
(3) carry out horizontal stroke, indulge the two-way simultaneous stretching through the substrate of biaxial tension equipment, make substrate be drawn into barrier film cooling forming;
(4) use the alkanes extractant, barrier film is extracted the mineral oil in the barrier film through extraction tank;
(5) barrier film after will extracting is finalized the design, stretches, is rectified a deviation barrier film, and guarantee the volatilization of the remaining extract on the barrier film through cross directional stretch equipment;
(6) barrier film is heat-treated;
(7) the finished product barrier film after the heat treatment is carried out rolling.
At last, the finished product barrier film is cut and packed.
Please refer to Fig. 1; Preparation method corresponding to above-mentioned power lithium-ion battery barrier film; The utility model provides a kind of preparation system of power lithium-ion battery barrier film; Comprise agitating device 1, the first processing line subsystem and the second processing line subsystem; The first processing line subsystem and the second processing line subsystem are connected to after the agitating device 1, and the first processing line subsystem is identical with the second processing line subsystem, comprises extrusion device 2, cooling forming device 3, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7 and wrap-up 8 respectively; Extrusion device 2 is connected after the agitating device 1, and extrusion device 2, cooling forming device 3, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7, wrap-up 8 connect successively.
Be that this preparation system comprises agitating device 1; Agitating device 1 back connects two identical apparatus processing lines; The i.e. first processing line subsystem and the second processing line subsystem; The first processing line subsystem and the second processing line subsystem comprise extrusion device 2, cooling forming device 3, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7 and wrap-up 8 respectively; Extrusion device 2, cooling forming device 3, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7 and wrap-up 8 are connected successively, and extrusion device 2 is connected after the agitating device 1.
Processing technology below in conjunction with the preparation of power lithium-ion battery barrier film is described in detail.
A kind of lithium ion battery separator preparation method's concrete steps are following:
One, with in ultra high molecular polyethylene, antioxidant and the mineral oil proportioning adding by a certain percentage mixer raw material fully being stirred; Wherein, The mass ratio of mineral oil and antioxidant is 1000 ~ 2000: 1, and the mass ratio of mineral oil and ultra high molecular polyethylene is 2 ~ 10: 1.
The molecular weight of the molecule of the ultra high molecular polyethylene in the present embodiment is more than 1,000,000.
Two, will flow into first processing line and second processing line is processed respectively simultaneously through dividing by the step 1 mixture after being mixed.
Get into the processing of the mixture of first processing line:
(1) the mixture input double screw extruder heating that gets into first processing line is extruded continuously, forms substrate.
Here the screw diameter of double screw extruder is 10 ~ 150 millimeters, and its extrusion capacity greater than 200 kilograms per hour.
(2) substrate of extruding from double screw extruder carries out cooling forming through one group of chill roll group;
(3) through biaxial tension equipment substrate is carried out horizontal stroke, vertical two-way simultaneous stretching, make substrate be drawn into barrier film, the membrane thicknesses of drawing and forming reaches 10～150 μ m.
(4) using 80% ~ 99.9% high concentration alkanes extractant, is that 1000～3000 barrier film extracts the mineral oil in the barrier film through extraction tank with width, and one-step pore-creating.
(5) barrier film after will extracting is finalized the design, stretches, is rectified a deviation barrier film with 5 ~ 50 meters/minute speed, and guarantee the volatilization of the remaining extract on the barrier film through cross directional stretch equipment.
(6) barrier film is carried out 3～15 minutes heat treatment.
(7) after barrier film is accomplished the heat treatment of (5), carry out rolling through 8 pairs of finished product barrier films of wrap-up, and then cut and pack.
Get into the processing of the substrate of second processing line:
(1) the mixture input double screw extruder heating that gets into second processing line is extruded continuously, forms substrate.
Here the screw diameter of double screw extruder is 10 ~ 150 millimeters, and its extrusion capacity greater than 200 kilograms per hour.
(2) substrate of extruding from double screw extruder carries out cooling forming through one group of chill roll group;
(3) through biaxial tension equipment substrate is carried out horizontal stroke, vertical two-way simultaneous stretching, make substrate be drawn into barrier film, the membrane thicknesses of drawing and forming reaches 10～150 μ m.
(4) using 80% ~ 99.9% high concentration alkanes extractant, is that 1000～3000 barrier film extracts the mineral oil in the barrier film through extraction tank with width, and one-step pore-creating.
(5) barrier film after will extracting is finalized the design, stretches, is rectified a deviation barrier film with 5 ~ 50 meters/minute speed, and guarantee the volatilization of the remaining extract on the barrier film through cross directional stretch equipment.
(6) barrier film is carried out 3～15 minutes heat treatment.
(7) after barrier film is accomplished the heat treatment of (5), carry out rolling through 8 pairs of finished product barrier films of wrap-up, and then cut and pack.
Therefore, during the work of the preparation system of power lithium-ion battery barrier film, at first a certain proportion of ultra high molecular polyethylene, antioxidant and mineral oil are added in the agitating device 1 and fully stir.Wherein, the mass ratio of mineral oil and antioxidant is 1000 ~ 2000: 1, and the mass ratio of mineral oil and ultra high molecular polyethylene is 2 ~ 10: 1.The molecular weight of ultra high molecular polyethylene is more than 1,000,000.The viscosity grade capable of using of mineral oil is between 30～60.
After ultra high molecular polyethylene, antioxidant and the abundant stirring of agitating device 1 of mineral oil process; Obtain mixture; These a little mixtures are through being divided into the first via mixture and the second road mixture, and first via mixture joins first processing line, and the second road mixture joins second processing line; The process equipment of first processing line and second processing line is identical with processing technology, below is that example is described with first processing line:
First via mixture is added extrusion device 2, and heat and extrude continuously, form substrate, the thickness of this substrate is 0.1～15mm.Wherein extrusion device 2 can be a double screw extruder, and its screw diameter is 10 ~ 150 millimeters, and extrusion capacity greater than 200 kilograms per hour.
The first via substrate of extruding from extrusion device 2 carries out cooling forming through cooling forming device 3.Wherein, cooling forming device 3 comprises some groups of refrigerating modules, and every pack module comprises two chill rolls.In the present embodiment, cooling forming device 3 can be made up of six groups of refrigerating modules, and every pack module has two chill rolls, and the temperature of every group of refrigerating module is different, and cooling forming can make in the substrate ultra high molecular polyethylene non-crystallizable, reaches the purpose of film thickness homogeneous.
Behind substrate process cooling forming device 3 cooling formings, carry out horizontal stroke, vertical two-way simultaneous stretching through biaxial tension device 4 again, making substrate be drawn into thickness is 10～150 μ m.Biaxial tension device 4 stretches for transverse and longitudinal simultaneously, can regulate hot strength through regulating stretch ratio, can guarantee that like this film thickness is even, and the transverse and longitudinal stretch ratio can be adjusted according to the thickness degree.
Behind barrier film process biaxial tension device 4 drawing and formings, carry out single extraction through extraction equipment 5 again, and extract the mineral oil in the barrier film.Extraction equipment 5 can be an extraction tank.Extractant in the extraction equipment 5 can be positive flow silane, normal heptane, carrene etc., and wherein the extractant of alkanes can make the mineral oil in the barrier film separate out fully.
Barrier film gets into cross directional stretch device 6 after extracting through extraction equipment 5.Please refer to Fig. 2, the strutting piece 603 that cross directional stretch equipment comprises in order to the clamping device 601 that clamps the barrier film after the extraction, make track 602 that clamping device moves forward and clamping device and track 602 are supported.After barrier film got into cross directional stretch device 6, left clamping unit 601 clamped with the both sides of right clamping unit with barrier film.After the clamping, barrier film is along with clamping device 601 speed with 5 ~ 50 meters/minute under track 602 effects travels forward.Because track 602 becomes an oblique angle less than 5 ° outwards to depart from the diaphragm movement direction; Along with travelling forward of barrier film; Distance between left side clamping unit and the right clamping unit increases gradually, and barrier film is launched by cross directional stretch gradually, and this process has been accomplished the correction and the typing of barrier film.Simultaneously, the length setting of guide rail is 20 ~ 30 meters, in the process of whole motion, remains in extractant on the barrier film and can access volatilization more fully, and the thickness homogeneity through the cross directional stretch barrier film is controlled better.
Through annealing device 7 it is carried out heat treatment in 6～12 minutes at last.
Just become the finished product barrier film after barrier film is heat-treated, the finished product barrier film is through wrap-up 8 rolling of curling, and then through cutting and operation such as packing after just can obtain the finished product of power lithium-ion battery barrier film.
The utility model connects two identical processing lines at the back at mixer to be processed simultaneously, and promptly the front of two processing lines is used mixer jointly, has reduced the use amount of equipment, has reduced the cost of equipment.
More than a disclosed specific embodiment that is merely the utility model, but the utility model is not limited thereto, any those skilled in the art can think variation, all should drop in the protection range of the utility model.
Claims (5)
1. the preparation system of a power lithium-ion battery barrier film; It is characterized in that; Comprise agitating device, the first processing line subsystem and the second processing line subsystem; Said first processing line subsystem and the said second processing line subsystem are connected to after the said agitating device; The said first processing line subsystem is identical with the said second processing line subsystem; Comprise extrusion device, cooling forming device, biaxial tension device, extraction equipment, cross directional stretch device, annealing device and wrap-up respectively, said extrusion device is connected after the said agitating device, and said extrusion device, cooling forming device, biaxial tension device, extraction equipment, cross directional stretch device, annealing device, wrap-up connect successively.
2. the preparation system of power lithium-ion battery barrier film as claimed in claim 1; It is characterized in that; The strutting piece that said cross directional stretch equipment comprises in order to the clamping device that clamps the barrier film after the extraction, make track that clamping device moves forward and clamping device and track are supported, clamping device comprises left clamping unit and the right clamping unit that is positioned at the barrier film both sides.
3. the preparation system of power lithium-ion battery barrier film as claimed in claim 2 is characterized in that, track length is 20 ~ 30 meters, and track becomes an oblique angle less than 5 ° outwards to depart from the diaphragm movement direction.
4. the preparation system of power lithium-ion battery barrier film as claimed in claim 1 is characterized in that, said cooling forming device comprises some groups of refrigerating modules, and every pack module comprises two chill rolls.
5. the preparation system of power lithium-ion battery barrier film as claimed in claim 4 is characterized in that, said cooling forming device comprises 6 groups of refrigerating modules, and under the operating state, the temperature of every group of refrigerating module is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203199786U CN202205831U (en) | 2011-08-30 | 2011-08-30 | Preparation system of diaphragm of power lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203199786U CN202205831U (en) | 2011-08-30 | 2011-08-30 | Preparation system of diaphragm of power lithium ion battery |
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| Publication Number | Publication Date |
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| CN202205831U true CN202205831U (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203199786U Expired - Fee Related CN202205831U (en) | 2011-08-30 | 2011-08-30 | Preparation system of diaphragm of power lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315404A (en) * | 2011-08-30 | 2012-01-11 | 上海乾呈玩具科技有限公司 | Preparation method and system for power lithium ion battery diaphragm |
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2011
- 2011-08-30 CN CN2011203199786U patent/CN202205831U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315404A (en) * | 2011-08-30 | 2012-01-11 | 上海乾呈玩具科技有限公司 | Preparation method and system for power lithium ion battery diaphragm |
| CN102315404B (en) * | 2011-08-30 | 2014-04-09 | 上海乾呈玩具科技有限公司 | Preparation method and system for power lithium ion battery diaphragm |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20150830 |
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| EXPY | Termination of patent right or utility model |