CN202178310U - Composite polypropylene diaphragm for ultrahigh-molecular-weight polyethylene lithium batteries - Google Patents
Composite polypropylene diaphragm for ultrahigh-molecular-weight polyethylene lithium batteries Download PDFInfo
- Publication number
- CN202178310U CN202178310U CN2011200793611U CN201120079361U CN202178310U CN 202178310 U CN202178310 U CN 202178310U CN 2011200793611 U CN2011200793611 U CN 2011200793611U CN 201120079361 U CN201120079361 U CN 201120079361U CN 202178310 U CN202178310 U CN 202178310U
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- Prior art keywords
- diaphragm
- lithium battery
- ultrahigh
- molecular
- 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 relates to a lithium battery diaphragm, in particular to a multilayer composite diaphragm, which comprises a lithium battery diaphragm, specifically an ultrahigh-molecular-weight polyethylene diaphragm. Micropores are distributed on the diaphragm, and polypropylene material layers are respectively arranged on the upper surface and the lower surface of the ultrahigh-molecular-weight polyethylene diaphragm. The lithium battery diaphragm made from the ultrahigh-molecular-weight polyethylene material has favorable corrosion resistance and high-temperature resistance when in use, and can maintain stable operational performance in the corrosive environment of electrolyte in batteries and in case of temperature variation when in use, thereby improving the service stability of the batteries and improving the performance of the batteries; and as the polyoxyethylene hydrophilic material layers are arranged on the surfaces of the diaphragm, the hydrophilcity of the surfaces of the diaphragm is improved.
Description
Technical field
The utility model relates to a kind of lithium battery diaphragm, especially a kind of MULTILAYER COMPOSITE barrier film.
Background technology
Ultra-high molecular weight polyethylene is called for short UHMWPE, English name ultra-high molecular weight polyethylene.Polyethylene is one of plastics variety that current production rate is maximum, application is the widest, 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 UHMEPE more than 1,500,000, use as engineering plastics because of physical and mechanical property is excellent.The high molecular weight (molecular weight of HDPE has only 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, have unrivaled wear-resisting, shock-resistant, the self-lubricating of common polythene and other engineering plastics, corrosion-resistant, absorb impact energy, low temperature resistant, 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 is not applied to as yet on the lithium battery diaphragm, and except hydrophily was not good, each item characteristic of ultra-high molecular weight polyethylene all was applicable to lithium battery diaphragm.Barrier film main function in battery material is to completely cut off both positive and negative polarity to prevent problems such as battery self discharging and the two poles of the earth short circuit, and the lithium ion battery separator material can be divided into: weave film, non-woven film (nonwoven fabrics); Microporous barrier, composite membrane, diaphragm paper; Several types of laminate etc., but owing to be full of the corrosion and the variation of temperature of electrolyte 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
It is a kind of corrosion-resistant good with resistance to elevated temperatures that the utility model provides, and possess the ultra high molecular polyethylene lithium battery diaphragm of good hydrophilicity.
To achieve these goals, the utility model adopts following technical scheme:
It comprises a lithium battery diaphragm, and its improvement is: said lithium battery diaphragm is the ultra high molecular polyethylene barrier film, on said barrier film, is distributed with micropore, is respectively equipped with the polypropylene material bed of material at the upper and lower surfaces of ultra high molecular polyethylene barrier film.
Preferably, said micropore size is 0.026-0.038 μ m.
Preferably, the thickness of said ultra high molecular polyethylene barrier film is 12-38 μ m.
Owing to adopted said structure; The ultra high molecular polyethylene lithium battery composite polypropylene barrier film use ultra high molecular polyethylene material of the utility model is processed lithium battery diaphragm and is had good corrosion-resistant and resistance to elevated temperatures in use; Keep stable operating characteristic in the variations in temperature of the corrosive environment of electrolyte that can be in battery when using; Thereby prolonged the stability of the use of battery; Improved battery performance, and polyoxyethylene water wetted material layer has been set, improved the hydrophily of membrane surface on the surface.
Description of drawings
Fig. 1 is the cross section structure sketch map of the utility model.
The utility model purpose, function and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
As shown in Figure 1, the embodiment of the utility model comprises ultra high molecular polyethylene barrier film 1, on said barrier film, is distributed with micropore 11, is respectively equipped with polypropylene (PP) material layer 2 at the upper and lower surfaces of ultra high molecular polyethylene barrier film 1; Said micropore 11 apertures are 0.026-0.038 μ m; The thickness of said ultra high molecular polyethylene barrier film 1 is 12-38 μ m.
In the present embodiment, be mixed with nano silicon in the said polyoxyethylene water wetted material layer.
The above is merely the preferred embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.
Claims (3)
1. ultra high molecular polyethylene lithium battery composite polypropylene barrier film; Comprise a lithium battery diaphragm; It is characterized in that: said lithium battery diaphragm is the ultra high molecular polyethylene barrier film; On said barrier film, be distributed with micropore, be respectively equipped with the polypropylene material bed of material at the upper and lower surfaces of ultra high molecular polyethylene barrier film.
2. ultra high molecular polyethylene lithium battery composite polypropylene barrier film as claimed in claim 1 is characterized in that: said micropore size is 0.026-0.038 μ m.
3. ultra high molecular polyethylene lithium battery composite polypropylene barrier film as claimed in claim 2 is characterized in that: the thickness of said ultra high molecular polyethylene barrier film is 12-38 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200793611U CN202178310U (en) | 2011-03-23 | 2011-03-23 | Composite polypropylene diaphragm for ultrahigh-molecular-weight polyethylene lithium batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200793611U CN202178310U (en) | 2011-03-23 | 2011-03-23 | Composite polypropylene diaphragm for ultrahigh-molecular-weight polyethylene lithium batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202178310U true CN202178310U (en) | 2012-03-28 |
Family
ID=45868178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200793611U Expired - Lifetime CN202178310U (en) | 2011-03-23 | 2011-03-23 | Composite polypropylene diaphragm for ultrahigh-molecular-weight polyethylene lithium batteries |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202178310U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910860A (en) * | 2017-03-28 | 2017-06-30 | 欣旺达电子股份有限公司 | Lithium battery diaphragm coating, barrier film and barrier film preparation method |
-
2011
- 2011-03-23 CN CN2011200793611U patent/CN202178310U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910860A (en) * | 2017-03-28 | 2017-06-30 | 欣旺达电子股份有限公司 | Lithium battery diaphragm coating, barrier film and barrier film preparation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ATOP New Materials Co., Ltd. Assignor: Shen Dan Contract record no.: 2011440020456 Denomination of utility model: Novel ultrahigh-molecular-weight-polyethylene composite polypropylene diaphragm for lithium battery Granted publication date: 20120328 License type: Exclusive License Record date: 20111208 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |
|
| CX01 | Expiry of patent term |