CN202004069U - Power lithium ion battery diaphragm preparation system - Google Patents
Power lithium ion battery diaphragm preparation system Download PDFInfo
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- CN202004069U CN202004069U CN2011201138449U CN201120113844U CN202004069U CN 202004069 U CN202004069 U CN 202004069U CN 2011201138449 U CN2011201138449 U CN 2011201138449U CN 201120113844 U CN201120113844 U CN 201120113844U CN 202004069 U CN202004069 U CN 202004069U
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- Prior art keywords
- ion battery
- barrier film
- processing line
- preparation system
- power lithium
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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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- Secondary Cells (AREA)
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Abstract
The utility model discloses a power lithium ion battery diaphragm preparation system, which comprises a stirring device, an extrusion device, a first processing line subsystem and a second processing line subsystem. After the extrusion device is connected with the stirring device, the first and second processing line subsystems are connected behind the extrusion device respectively. The first and second processing line subsystems are the same, and comprise a cooling molding device, a two-way stretching device, an extraction device, a horizontal stretching device and a heat treatment device respectively. The cooling molding device is connected behind the extrusion device. The cooling molding device, the two-way stretching device, the extraction device, the horizontal stretching device and the heat treatment device are sequentially connected. The power lithium ion battery diaphragm preparation system solves the technical problems of intensive equipment usage and relatively higher equipment cost in the production of a lithium ion battery diaphragm in the prior art.
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.
China Patent No. 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 this 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, extrusion device, the first processing line subsystem and the second processing line subsystem, described extrusion device is connected after the agitating device, described first processing line subsystem and the described second processing line subsystem are connected to after the described extrusion device, the described first processing line subsystem is identical with the described second processing line subsystem, comprise cooling forming device respectively, the biaxial tension device, extraction equipment, the cross directional stretch device, annealing device, described cooling forming device is connected after the described extrusion device, described cooling forming device, the biaxial tension device, extraction equipment, the cross directional stretch device, annealing device connects successively.
Preferably, the strutting piece that described 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, described cooling forming device comprises some groups of refrigerating modules, and every pack module comprises two chill rolls.
Preferably, described cooling forming device comprises 6 groups of refrigerating modules, under the operating state, and the temperature difference of every group of refrigerating module.
Preferably, described annealing device back also connects crimping device and cuts packing device.
With respect to prior art, the utlity model has following advantage:
1, the utility model is processed simultaneously at extruder back two identical processing lines of connection, and promptly the front of two processing lines is used mixer and extruder 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, by 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 the preparation connection diagram of a kind of power lithium-ion battery barrier film of the utility model;
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.
Please refer to Fig. 1, the utility model provides a kind of preparation system of power lithium-ion battery barrier film, comprise agitating device 1, extrusion device 2, the first processing line subsystem and the second processing line subsystem, extrusion device 2 is connected after the agitating device 1, the first processing line subsystem and the second processing line subsystem are connected to after the extrusion device 2, the first processing line subsystem is identical with the second processing line subsystem, comprise cooling forming device 3 respectively, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7, cooling forming device 3 is connected after the extrusion device 2, cooling forming device 3, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7 connects successively.
Be that this preparation system comprises agitating device 1, extrusion device 2, extrusion device 2 is connected agitating device 1 back, extrusion device 2 back connect 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 cooling forming device 3 respectively, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7, cooling forming device 3, biaxial tension device 4, extraction equipment 5, cross directional stretch device 6, annealing device 7 connects successively, and cooling forming device 3 is connected after the extrusion device.
Processing technology below in conjunction with the preparation of power lithium-ion battery barrier film is described in detail.
When the preparation system work of power lithium-ion battery barrier film of the present utility model, 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 utilized viscosity grade of mineral oil is between 30～60.
Through after the abundant stirring of agitating device 1, its mixture is added extrusion device 2 at ultra high molecular polyethylene, antioxidant and mineral oil, 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.
After extrusion device 2 is extruded substrate, substrate after these are extruded is split into two-way by two conveyer belts, be the first via substrate and the second roadbed sheet, first via substrate enters the first processing line subsystem, the second roadbed sheet enters the second processing line subsystem, the process equipment of the first processing line subsystem and the second processing line subsystem is identical with processing technology, below is that example is described with first processing line: first via substrate carries out cooling forming by cooling forming device 3 to substrate.Cooling forming device 3 can be made up of six groups of refrigerating modules, and every pack module has two chill rolls, the temperature difference of every group of refrigerating module, 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 by biaxial tension device 4 again, making substrate be drawn into thickness is 10～150 μ m.Biaxial tension device 4 stretches simultaneously for transverse and longitudinal, can regulate hot strength by 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 enters 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 are supported.After barrier film entered cross directional stretch device 6, left clamping unit 601 and right clamping unit clamped the both sides of barrier film.After the clamping, barrier film is along with clamping device 601 speed with 5 ~ 50 meters/minute under guide rail 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 601 and the right clamping unit increases gradually, and barrier film is launched by cross directional stretch gradually, and this process has been finished the correction and the typing of barrier film.Simultaneously, the length setting of guide rail is 20 ~ 30 meters, remains in extractant on the barrier film and can access volatilization more fully in the process of whole motion, and the thickness homogeneity by the cross directional stretch barrier film is controlled better.
By annealing device 7 it is carried out heat treatment in 6～12 minutes at last.
As long as to the barrier film after handling curl, cut and operation such as packing after just can obtain the finished product of power lithium-ion battery barrier film, promptly barrier film also need by curl subsystem with cut and packing device.
The utility model connects two identical processing lines to be processed simultaneously in the extruder back, and promptly the front of two processing lines is used mixer and extruder jointly, has reduced the use amount of equipment, has reduced the cost of equipment.
More than disclosed only be a specific embodiment of the present 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 present utility model.
Claims (6)
1. the preparation system of a power lithium-ion battery barrier film, it is characterized in that, comprise agitating device, extrusion device, the first processing line subsystem and the second processing line subsystem, described extrusion device is connected after the agitating device, described first processing line subsystem and the described second processing line subsystem are connected to after the described extrusion device, the described first processing line subsystem is identical with the described second processing line subsystem, comprise cooling forming device respectively, the biaxial tension device, extraction equipment, the cross directional stretch device, annealing device, described cooling forming device is connected after the described extrusion device, described cooling forming device, the biaxial tension device, extraction equipment, the cross directional stretch device, annealing device connects 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 described 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, described 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, described cooling forming device comprises 6 groups of refrigerating modules, under the operating state, and the temperature difference of every group of refrigerating module.
6. the preparation system of power lithium-ion battery barrier film as claimed in claim 1 is characterized in that, described annealing device back also connects crimping device and cuts packing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201138449U CN202004069U (en) | 2011-04-18 | 2011-04-18 | Power lithium ion battery diaphragm preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201138449U CN202004069U (en) | 2011-04-18 | 2011-04-18 | Power lithium ion battery diaphragm preparation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004069U true CN202004069U (en) | 2011-10-05 |
Family
ID=44706796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201138449U Expired - Fee Related CN202004069U (en) | 2011-04-18 | 2011-04-18 | Power lithium ion battery diaphragm preparation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202004069U (en) |
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2011
- 2011-04-18 CN CN2011201138449U patent/CN202004069U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20170418 |