CN202042538U - Novel ultra-high molecular polyethylene lithium battery composite diaphragm - Google Patents
Novel ultra-high molecular polyethylene lithium battery composite diaphragm Download PDFInfo
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- CN202042538U CN202042538U CN2011200736676U CN201120073667U CN202042538U CN 202042538 U CN202042538 U CN 202042538U CN 2011200736676 U CN2011200736676 U CN 2011200736676U CN 201120073667 U CN201120073667 U CN 201120073667U CN 202042538 U CN202042538 U CN 202042538U
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- high molecular
- molecular polyethylene
- lithium battery
- diaphragm
- composite 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 lithium battery composite diaphragm, in particular to a multilayer composite diaphragm. The lithium battery diaphragm is an ultra-high molecular polyethylene composite diaphragm, micro holes are distributed on the diaphragm, and the upper surface and the lower surface of the ultra-high molecular polyethylene composite diaphragm are provided with hydrophilic material coating layers. The ultra-high molecular polyethylene lithium battery composite diaphragm is made of ultra-high molecular polyethylene materials, has good corrosion resistance and thermostability, and has using characteristic of keeping stable in corrosion environment of electrolyte in batteries and temperature change. Therefore, using stability of the batteries is prolonged, and battery performance is improved. Moreover, the surface of the ultra-high molecular polyethylene lithium battery composite diaphragm is provided with the polyethylene hydrophilic material layers, thereby improving hydrophilism of the surface of the diaphragm.
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 weightpolyethylene.Polyethylene is one of current production rate maximum, most widely used plastics variety, 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, 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 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, non-woven film (nonwoven fabrics), microporous barrier, composite membrane, diaphragm paper, several classes such as laminate, 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 novel ultra high molecular polyethylene lithium battery composite 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: described lithium battery diaphragm is the ultra high molecular polyethylene barrier film, is distributed with micropore on described barrier film, is respectively equipped with one deck water wetted material coating layer at least in the upper and lower surface of ultra high molecular polyethylene barrier film.
Preferably, described micropore size is 0.026-0.038 μ m.
Preferably, the thickness of described ultra high molecular polyethylene barrier film is 12-38 μ m.
Owing to adopted said structure, ultra high molecular polyethylene lithium battery composite diaphragm use ultra high molecular polyethylene material of the present utility model is made lithium battery diaphragm and is had good corrosion-resistant and resistance to elevated temperatures in use, keep stable operating characteristic in the corrosive environment of electrolyte that can be in battery and the variations in temperature when using, thereby prolonged the stability of the use of battery, improved battery performance, and the water wetted material coating layer is set on the surface, has improved the hydrophily of membrane surface.
Description of drawings
Fig. 1 is a cross section structure schematic diagram of the present utility model.
The utility model purpose, function and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
As shown in Figure 1, embodiment of the present utility model comprises ultra high molecular polyethylene barrier film 1, is distributed with micropore 11 on described barrier film, is respectively equipped with water wetted material coating layer 2 in the upper and lower surface of ultra high molecular polyethylene barrier film 1; Described 11 micropore sizes are 0.026-0.038 μ m; The thickness of described ultra high molecular polyethylene barrier film 1 is 12-38 μ m.
Water wetted material coating layer in the present embodiment adopts coating machine to coat the ultra high molecular polyethylene membrane surface after can adopting coating material commonly used on the market to make slurry.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; 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 present utility model.
Claims (3)
1. novel ultra high molecular polyethylene lithium battery composite diaphragm, described lithium battery diaphragm is the ultra high molecular polyethylene barrier film, is distributed with micropore on described barrier film, is respectively equipped with one deck water wetted material coating layer at least in the upper and lower surface of ultra high molecular polyethylene barrier film.
2. novel ultra high molecular polyethylene lithium battery composite diaphragm as claimed in claim 1 is characterized in that: described micropore size is 0.026-0.038 μ m.
3. novel ultra high molecular polyethylene lithium battery composite diaphragm as claimed in claim 2 is characterized in that: the thickness of described ultra high molecular polyethylene barrier film is 12-38 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200736676U CN202042538U (en) | 2011-03-18 | 2011-03-18 | Novel ultra-high molecular polyethylene lithium battery composite diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200736676U CN202042538U (en) | 2011-03-18 | 2011-03-18 | Novel ultra-high molecular polyethylene lithium battery composite diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202042538U true CN202042538U (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200736676U Expired - Lifetime CN202042538U (en) | 2011-03-18 | 2011-03-18 | Novel ultra-high molecular polyethylene lithium battery composite diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202042538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288685A (en) * | 2017-12-29 | 2018-07-17 | 界首市天鸿新材料股份有限公司 | Air compressing device is tried out in a kind of utilization prepares lithium battery diaphragm processing technology |
-
2011
- 2011-03-18 CN CN2011200736676U patent/CN202042538U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288685A (en) * | 2017-12-29 | 2018-07-17 | 界首市天鸿新材料股份有限公司 | Air compressing device is tried out in a kind of utilization prepares lithium battery diaphragm processing technology |
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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 ultra-high molecular weight polyethylene lithium battery composite diaphragm Granted publication date: 20111116 License type: Exclusive License Record date: 20111208 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |
|
| CX01 | Expiry of patent term |