CN203631639U - Polyethylene lithium battery multilayer composite polyethylene diaphragm with micro-pores - Google Patents
Polyethylene lithium battery multilayer composite polyethylene diaphragm with micro-pores Download PDFInfo
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- CN203631639U CN203631639U CN201320728143.5U CN201320728143U CN203631639U CN 203631639 U CN203631639 U CN 203631639U CN 201320728143 U CN201320728143 U CN 201320728143U CN 203631639 U CN203631639 U CN 203631639U
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- polyethylene
- film
- multilayer composite
- lithium battery
- 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 utility model relates to a polyethylene lithium battery multilayer composite polyethylene diaphragm with micro-pores. The polyethylene lithium battery multilayer composite polyethylene diaphragm with the micro-pores comprises double base films; both the double base films are polyethylene high molecular diaphragms; a plurality of micro-pores are uniformly distributed in each polyethylene high molecular diaphragm; a fluorinated ethylene propylene film is sandwiched between the two polyethylene high molecular diaphragms; a polyester non-woven fabric film is attached to the outer surface of each polyethylene high molecular diaphragm; and through holes are uniformly distributed in both the fluorinated ethylene propylene film and the polyester non-woven fabric film. The fluorinated ethylene propylene film and the polyester non-woven fabric film are additionally arranged, so that the polyethylene lithium battery multilayer composite polyethylene diaphragm with the micro-pores has high strength, high ductility, and stable radiating performance; and heat is conducted out rapidly in an environment with high heat production rate. The polyethylene lithium battery multilayer composite polyethylene diaphragm with the micro-pores has high strength, high ductility and stable radiating performance, is widely applied to various lithium batteries, and is particularly suitable for high-energy small-size lithium battery configurations.
Description
Technical field
The utility model relates to a kind of macromolecular material barrier film, particularly a kind of polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore that has good strength, ductility and heat dispersion concurrently being applied on lithium battery.
Background technology
Lithium battery owing to having advantages of that voltage is high, energy is high, have extended cycle life and free from environmental pollution, become the battery of new generation of extensive use.Owing to using, constantly miniaturization of electronic product and the application of lithium battery are more and more universal, lithium battery small product size also inevitably reduces thereupon, the thing followed is but that fault and rate of failure are more and more higher, trace it to its cause, after smaller volume, the a large amount of integrated and compression of lithium battery structure and parts is actual, the variation of the intensity of lithium battery diaphragm and ductility relativity, be subject to easily distortion in external force situation, in the situation that rate of rise in temperature accelerates, it is loose that heat is difficult for row, cause barrier film to occur distortion, micropore dwindles the even phenomenon such as closed pore, long-term accumulation makes the stability in use of lithium battery and fail safe all have hidden danger.
Utility model content
The technical problems to be solved in the utility model is the above-mentioned defect that how to overcome prior art, and a kind of polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore is provided.
For solving the problems of the technologies described above, this polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore comprises double-deck basement membrane, described double-deck basement membrane is vinyl polymer barrier film, uniform some micropores on this vinyl polymer barrier film, between two layers of polyethylene polymer separators, accompany one deck perfluoroethylene-propylene film, vinyl polymer barrier film outer surface, with one deck polyester non-woven fabric film, is laid with through hole on described perfluoroethylene-propylene film and polyester non-woven fabric film.So design, serve as fid by polyester non-woven fabric film, perfluoroethylene-propylene film serves as heat dissipating layer, not only make this polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore there is high strength and good ductility, make it be subject to the not yielding or micropore of External Force Acting and dwindle even closed pore, and there is stable heat dispersion, in the fireballing environment of heat production, rapidly heat is conducted.
As optimization, described perfluoroethylene-propylene film is provided with subregion heat conduction parting bead, and perfluoroethylene-propylene film is divided into some completely independently radiating areas by it.So design, the convenient heat dissipation capacity for different regions needs, and different radiating areas thickness and area is set, and heat is delivered to rapidly to adjacent area, the heat radiation of fast uniform.
As optimization, described vinyl polymer membrane thicknesses is 20～60 μ m, and the thickness of described perfluoroethylene-propylene film and subregion heat conduction parting bead is 5～10 μ m, and described polyester non-woven fabric film thickness is 40～80 μ m.So design, makes this high performance lithium battery diaphragm keep frivolous characteristic.
As optimization, the aperture of described micropore is 0.02～0.6 μ m; The aperture of described through hole is 1～3 μ m.So design, can provide mechanical isolation, guarantees the electronic isolation between both positive and negative polarity, utilizes again the pore structure of micropore and through hole to match, and guarantees smooth smooth the seeing through of lithium battery electrolyte inside ion.
A kind of polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene membrane configuration with micropore of the utility model is simple, with low cost, reasonable in design, have high strength, high ductibility and good heat dispersion concurrently, be widely used in various lithium batteries, be particularly useful for the lithium battery configuration of high-energy small size.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, a kind of polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore of the utility model is described further:
Fig. 1 is the structural representation of the execution mode 1 of this polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore;
Fig. 2 is the structural representation of the execution mode 2 of this polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore.
In figure: 1-vinyl polymer barrier film, 2-micropore, 3-perfluoroethylene-propylene film, 4-polyester non-woven fabric film, 5-subregion heat conduction parting bead.
Embodiment
Execution mode 1: as shown in Figure 1, this polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore comprises double-deck basement membrane, described double-deck basement membrane is vinyl polymer barrier film 1, uniform some micropores 2 on this vinyl polymer barrier film 1, between two layers of polyethylene polymer separators 1, accompany one deck perfluoroethylene-propylene film 3, vinyl polymer barrier film 1 outer surface, with one deck polyester non-woven fabric film 4, is laid with through hole on described perfluoroethylene-propylene film 3 and polyester non-woven fabric film 4.Described vinyl polymer barrier film 1 thickness is 60 μ m, and the thickness of described perfluoroethylene-propylene film 3 and subregion heat conduction parting bead 5 is 5 μ m, and described polyester non-woven fabric film 4 thickness are 80 μ m.The aperture of described micropore 2 is 0.6 μ m; The aperture of described through hole is 1 μ m.
Execution mode 2: as shown in Figure 2, described perfluoroethylene-propylene film 3 is provided with subregion heat conduction parting bead 5, and perfluoroethylene-propylene film 3 is divided into some completely independently radiating areas by it.Described vinyl polymer barrier film 1 thickness is 20 μ m, and the thickness of described perfluoroethylene-propylene film 3 and subregion heat conduction parting bead 5 is 10 μ m, and described polyester non-woven fabric film 4 thickness are 40 μ m.The aperture of described micropore 2 is 0.02 μ m; The aperture of described through hole is 3 μ m.All the other structures and parts as tdescribed in embodiment 1, omit.
The utility model includes but not limited to above-mentioned execution mode, and any product that meets the description of these claims, within all falling into protection range of the present utility model.
Claims (4)
1. the polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore, comprise double-deck basement membrane, it is characterized in that: described double-deck basement membrane is vinyl polymer barrier film (1), the upper uniform some micropores (2) of this vinyl polymer barrier film (1), between two layers of polyethylene polymer separators (1), accompany one deck perfluoroethylene-propylene film (3), vinyl polymer barrier film (1) outer surface, with one deck polyester non-woven fabric film (4), is laid with through hole on described perfluoroethylene-propylene film (3) and polyester non-woven fabric film (4).
2. the polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore according to claim 1, it is characterized in that: described perfluoroethylene-propylene film (3) is provided with subregion heat conduction parting bead (5), perfluoroethylene-propylene film (3) is divided into some completely independently radiating areas by it.
3. the polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore according to claim 2, it is characterized in that: described vinyl polymer barrier film (1) thickness is 20～60 μ m, the thickness of described perfluoroethylene-propylene film (3) and subregion heat conduction parting bead (5) is 5～10 μ m, and described polyester non-woven fabric film (4) thickness is 40～80 μ m.
4. according to the arbitrary described polyethylene lithium electricity MULTILAYER COMPOSITE polyethylene barrier film with micropore of claims 1 to 3, it is characterized in that: the aperture of described micropore (2) is 0.02～0.6 μ m; The aperture of described through hole is 1～3 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320728143.5U CN203631639U (en) | 2013-11-15 | 2013-11-15 | Polyethylene lithium battery multilayer composite polyethylene diaphragm with micro-pores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320728143.5U CN203631639U (en) | 2013-11-15 | 2013-11-15 | Polyethylene lithium battery multilayer composite polyethylene diaphragm with micro-pores |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203631639U true CN203631639U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320728143.5U Expired - Fee Related CN203631639U (en) | 2013-11-15 | 2013-11-15 | Polyethylene lithium battery multilayer composite polyethylene diaphragm with micro-pores |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203631639U (en) |
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2013
- 2013-11-15 CN CN201320728143.5U patent/CN203631639U/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 |
Granted publication date: 20140604 Termination date: 20181115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |