CN202888297U - Ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries - Google Patents
Ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries Download PDFInfo
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- CN202888297U CN202888297U CN2012204879048U CN201220487904U CN202888297U CN 202888297 U CN202888297 U CN 202888297U CN 2012204879048 U CN2012204879048 U CN 2012204879048U CN 201220487904 U CN201220487904 U CN 201220487904U CN 202888297 U CN202888297 U CN 202888297U
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- barrier film
- weight polyethylene
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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 discloses an ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries. Micropores are formed in an ultra-high molecular-weight polyethylene diaphragm, the diameter of the micropores is 0.026-0.038 mu m, and the thickness of the polyethylene membrane is 12-38 mu m; the upper and lower surfaces of the ultra-high molecular-weight polyethylene diaphragm are respectively provided with polypropylene; the surface of the polypropylene is provided with an alumina coating layer, and because alumina has chemical properties and has oxidation resistance, the chemical stability of the diaphragm can be effectively improved, and the performance stability of the diaphragm can be ensured. According to the utility model, an adopted polypropylene coating layer can effectively improve the crack resistance of the diaphragm and improve the mechanical properties of the diaphragm, the alumina coating layers can obviously improve the corrosion resistance, high temperature resistance, chemical stability and stability of the diaphragm. When the composite diaphragm works in an electrolyte corrosion environment of batteries, the stability of high temperature resistance of the diaphragm can be kept; and because the strength of the diaphragm is increased, the service life of batteries is prolonged, and the battery performances are improved.
Description
Technical field
The utility model belongs to technical field of lithium batteries, relates in particular to a kind of High Temperature Lithium Cell ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film.
Background technology
Polyethylene is one of maximum, most widely used plastics variety of current production rate, accounts for 30% of world's plastics total output.Wherein, LDPE, HDPE and be called as the poly LLDPE of the third generation etc. and all belong to the thermoplasticity general-purpose plastics have molecular weight only up to the UHMWPE more than 1,500,000, use as engineering plastics because physical and mechanical property is excellent.The high molecular weight (molecular weight of HDPE only has 2～300,000 usually) of UHMWPE is given its excellent serviceability, and belong to thermoplastic engineering plastic moderate, function admirable, it has almost concentrated the advantage of various plastics, has unrivaled wear-resisting, shock-resistant, the self-lubricating of common polythene and other engineering plastics, corrosion-resistant, impact-absorbing energy, low temperature resistant, the combination property such as health is nontoxic, be difficult for adhering to, be difficult for suction, density is less.In fact, also there is not a kind of simple macromolecular material to have so numerous excellent properties concurrently at present.Ultra-high molecular weight polyethylene has been applied to numerous areas at present, but not yet is applied on the lithium battery diaphragm, and except hydrophily was not good, every characteristic of ultra-high molecular weight polyethylene all was applicable to lithium battery diaphragm.Barrier film main function in battery material is that isolated both positive and negative polarity is to prevent the problems such as battery self discharging and the two poles of the earth short circuit, the lithium ion battery separator material can be divided into: weave film, nowoven membrane (nonwoven fabrics), microporous barrier, composite membrane, diaphragm paper, several classes such as laminate, but owing to be full of the corrosion of electrolyte and the variation of temperature in the operational environment of battery, so when long-term the use, the stability in use of above-mentioned various lithium battery diaphragms is relatively poor, is unfavorable for the use of the long-term stability of battery.
The utility model content
For overcoming the above problems, present case adopts paint-on technique to make a kind of High Temperature Lithium Cell ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film.Aluminium oxide and polypropylene evenly are coated on the barrier film, and the control coating thickness is beneficial to the application of heavy-duty battery, makes the high-performance lithium battery with high temperature resistant ultra high molecular polyethylene composite diaphragm.
The utility model is to realize like this, a kind of High Temperature Lithium Cell ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film, it is characterized in that, be provided with micropore on the ultra high molecular polyethylene barrier film, ultra high molecular polyethylene barrier film upper and lower surface is provided with polypropylene layer, and the polypropylene layer surface is provided with the alumina coated layer.
Further, described micropore size adopts 0.026-0.038 μ m.
Further, described polyethylene membrane thicknesses adopts 12-38 μ m.
But the cracking resistance of the polypropylene coat Effective Raise barrier film that the utility model adopts improves its mechanical performance, and the alumina coated layer can improve corrosion-resistant, resistance to elevated temperatures, chemical stability and the stability of barrier film.When this composite diaphragm is worked, can keep the stability of good heat-resisting quantity in the electrolyte corrosive environment of battery, and because the strength increase of barrier film, thereby prolong the useful life of battery, improve battery performance.
Description of drawings
Fig. 1 is the High Temperature Lithium Cell that provides of the utility model with the structural representation of ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The High Temperature Lithium Cell that Fig. 1 shows the utility model the to be provided structure of ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film.For convenience of explanation, only show the part relevant with the utility model.
Be provided with micropore 11 on the ultra high molecular polyethylene barrier film 1, ultra high molecular polyethylene barrier film 1 upper and lower surface is provided with polypropylene 2, and polypropylene 2 surfaces are provided with alumina coated layer 3.
Be provided with micropore 11 at ultra high molecular polyethylene barrier film 1,0.026-0.038 μ m is adopted in micropore 11 apertures, and the polyethylene membrane thicknesses adopts 12-38 μ m; Upper and lower surface at ultra high molecular polyethylene barrier film 1 is respectively arranged with polypropylene 2; Be provided with alumina coated layer 3 on polypropylene 2 surfaces, because aluminium oxide is a chemistry character tool non-oxidizability, but the chemical stability of Effective Raise barrier film guarantees that membrane properties is stable.
A kind of High Temperature Lithium Cell of this programme invention is provided with micropore 11 with ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film at ultra high molecular polyethylene barrier film 1, and 0.026-0.038 μ m is adopted in micropore 11 apertures, and the polyethylene membrane thicknesses adopts 12-38 μ m; Upper and lower surface at ultra high molecular polyethylene barrier film 1 is respectively arranged with polypropylene 2; Be provided with alumina coated layer 3 on polypropylene 2 surfaces, because aluminium oxide is a chemistry character tool non-oxidizability, but the chemical stability of Effective Raise barrier film guarantees that membrane properties is stable.
But the cracking resistance of the polypropylene coat Effective Raise barrier film that adopts improves its mechanical performance, and the alumina coated layer can improve corrosion-resistant, resistance to elevated temperatures, chemical stability and the stability of barrier film.When this composite diaphragm is worked, can keep the stability of good heat-resisting quantity in the electrolyte corrosive environment of battery, and because the strength increase of barrier film, thereby prolong the useful life of battery, improve battery performance.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (3)
1. a High Temperature Lithium Cell is with ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film, it is characterized in that, be provided with micropore on the ultra high molecular polyethylene barrier film, ultra high molecular polyethylene barrier film upper and lower surface is provided with polypropylene layer, and the polypropylene layer surface is provided with the alumina coated layer.
2. High Temperature Lithium Cell as claimed in claim 1 is characterized in that with ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film, and described micropore size adopts 0.026-0.038 μ m.
3. High Temperature Lithium Cell as claimed in claim 1 is characterized in that with ultra high molecular polyethylene MULTILAYER COMPOSITE barrier film, and described polyethylene membrane thicknesses adopts 12-38 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204879048U CN202888297U (en) | 2012-09-24 | 2012-09-24 | Ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012204879048U CN202888297U (en) | 2012-09-24 | 2012-09-24 | Ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries |
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| Publication Number | Publication Date |
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| CN202888297U true CN202888297U (en) | 2013-04-17 |
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| CN2012204879048U Expired - Fee Related CN202888297U (en) | 2012-09-24 | 2012-09-24 | Ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377331A (en) * | 2014-11-19 | 2015-02-25 | 新乡市中科科技有限公司 | Separator for lithium ion battery and preparation method of separator |
| CN108448035A (en) * | 2018-03-08 | 2018-08-24 | 广东蒙泰高新纤维股份有限公司 | A kind of lithium ion battery separator and its manufacturing method |
| CN110400961A (en) * | 2018-04-25 | 2019-11-01 | 银隆新能源股份有限公司 | High temperature resistant type lithium ion battery and preparation method thereof |
| CN115458342A (en) * | 2022-09-30 | 2022-12-09 | 浙江海滨薄膜科技有限公司 | BOPP (biaxially-oriented Polypropylene) capacitor film and preparation process thereof |
-
2012
- 2012-09-24 CN CN2012204879048U patent/CN202888297U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377331A (en) * | 2014-11-19 | 2015-02-25 | 新乡市中科科技有限公司 | Separator for lithium ion battery and preparation method of separator |
| CN108448035A (en) * | 2018-03-08 | 2018-08-24 | 广东蒙泰高新纤维股份有限公司 | A kind of lithium ion battery separator and its manufacturing method |
| WO2019169774A1 (en) * | 2018-03-08 | 2019-09-12 | 广东蒙泰高新纤维股份有限公司 | Lithium ion battery separator and manufacturing method therefor |
| US11189882B2 (en) | 2018-03-08 | 2021-11-30 | Guangdong Modern High-Tech Fiber Co., Ltd. | Lithium ion battery separator manufactured from composite fibers composed of polypropylene core and alkali-soluble polyester with polyethylene skin and manufacturing method of the same |
| CN110400961A (en) * | 2018-04-25 | 2019-11-01 | 银隆新能源股份有限公司 | High temperature resistant type lithium ion battery and preparation method thereof |
| CN115458342A (en) * | 2022-09-30 | 2022-12-09 | 浙江海滨薄膜科技有限公司 | BOPP (biaxially-oriented Polypropylene) capacitor film and preparation process thereof |
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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: 20130417 Termination date: 20180924 |