CN202888280U - High liquid adsorbing capacity composite diaphragm of ultra high molecular weight polyethylene (UHMWPE) lithium battery - Google Patents
High liquid adsorbing capacity composite diaphragm of ultra high molecular weight polyethylene (UHMWPE) lithium battery Download PDFInfo
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- CN202888280U CN202888280U CN2012204970342U CN201220497034U CN202888280U CN 202888280 U CN202888280 U CN 202888280U CN 2012204970342 U CN2012204970342 U CN 2012204970342U CN 201220497034 U CN201220497034 U CN 201220497034U CN 202888280 U CN202888280 U CN 202888280U
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- high molecular
- lithium battery
- composite diaphragm
- uhmwpe
- micropore
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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 a high liquid adsorbing capacity composite diaphragm of an ultra high molecular weight polyethylene (UHMWPE) lithium battery. The composite diaphragm comprises UHMWPE, micropores A, polyoxyethylene hydrophilic layers and micropores B, wherein the UHMWPE is provided with the micropores A; and the polyoxyethylene hydrophilic layers are arranged on the upper and lower surfaces of the UHMWPE and are provided with the micropores B. The composite diaphragm has the beneficial effects that the micropores are funnel-shaped and are butt-jointed with the micropores on the UHMWPE, thus improving the liquid adsorbing capacity of the diaphragm, prolonging the life of the lithium battery, improving the properties of the lithium battery and ensuring that the lithium battery can work efficiently and stably.
Description
Technical field
The utility model belongs to polymeric material field, relates in particular to a kind of ultra-high molecular polyethylene lithium battery composite diaphragm of high extension liquid ability.
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, the combination property such as have unrivaled wear-resisting, shock-resistant, the self-lubricating of common polythene and other engineering plastics, corrosion-resistant, impact-absorbing energy, low temperature resistant, 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 owing to its hydrophily is not good.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.And the microporous barrier of lithium battery adopts cylindrical hole more at present, and the extension liquid of film (electrolyte of film absorption) ability is general, is unfavorable for that ion passes through.
The utility model content
The purpose of this utility model is to utilize the ultra-high molecular polyethylene lithium battery composite diaphragm in a kind of high extension liquid ability, is intended to solve the stability in use that has lithium battery diaphragm now relatively poor, is unfavorable for the use of the long-term stability of battery.And the microporous barrier of lithium battery adopts cylindrical hole more, and the extension liquid of film (electrolyte of film absorption) ability is general, is unfavorable for the problem that ion passes through.
The purpose of this utility model is to provide a kind of ultra-high molecular polyethylene lithium battery composite diaphragm of high extension liquid ability, and described composite diaphragm comprises: ultra high molecular polyethylene, micropore A, polyoxyethylene hydrophilic layer, micropore B; Described micropore A is set on the described ultra high molecular polyethylene, and described ultra high molecular polyethylene upper and lower surface arranges described polyoxyethylene hydrophilic layer, and described micropore B is set on the described polyoxyethylene hydrophilic layer.
Further, described micropore B is infundibulate.
The high ultra-high molecular polyethylene lithium battery composite diaphragm of hanging the liquid ability of the present utility model, this composite diaphragm comprises: ultra high molecular polyethylene, micropore A, polyoxyethylene hydrophilic layer, micropore B; Micropore A is set on the ultra high molecular polyethylene, and the ultra high molecular polyethylene upper and lower surface arranges the polyoxyethylene hydrophilic layer, and micropore B is set on the polyoxyethylene hydrophilic layer.When composite diaphragm of the present utility model is worked in the electrolyte corrosive environment of battery, can keep good heat-resisting quantity and stability, thereby prolong the useful life of battery.Owing to hanging the raising of liquid ability, strengthened the performance of battery simultaneously, made the operation of lithium ion battery efficient stable.
Description of drawings
Fig. 1 is the structural representation that the height that provides of the utility model is hung the ultra-high molecular polyethylene lithium battery composite diaphragm of liquid ability.
Among the figure: 1, ultra high molecular polyethylene; 11, micropore A; 2, polyoxyethylene hydrophilic layer; 21, micropore B.
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 utility model embodiment provides a kind of ultra-high molecular polyethylene lithium battery composite diaphragm of high extension liquid ability, and this composite diaphragm comprises: ultra high molecular polyethylene, micropore A, polyoxyethylene hydrophilic layer, micropore B; Micropore A is set on the ultra high molecular polyethylene, and the ultra high molecular polyethylene upper and lower surface arranges the polyoxyethylene hydrophilic layer, and micropore B is set on the polyoxyethylene hydrophilic layer.
As the prioritization scheme of the utility model embodiment, micropore B is infundibulate.
Referring to accompanying drawing 1, the high ultra-high molecular polyethylene lithium battery composite diaphragm of hanging the liquid ability of the utility model is described in further detail.
The ultra-high molecular polyethylene lithium battery composite diaphragm of a kind of high extension liquid ability of we's case invention arranges micropore A11 at ultra high molecular polyethylene 1, and 0.026-0.038 μ m is adopted in micropore A11 aperture, and the thickness of polyethylene barrier film is 12-38 μ m; And utilize paint-on technique that polyoxyethylene hydrophilic layer 2 is set in ultra high molecular polyethylene 1 upper and lower surface, improve the water-wet behavior of barrier film, at polyoxyethylene hydrophilic layer 2 micropore B21 is set, the shape of micropore B21 is adopted infundibulate, dock with micropore (1) at the path place, funnel shaped maximum gauge is 3: 1 to 10: 1 with the minimum diameter ratio.Micro-pore shape adopts infundibulate to consist of, and when identical porosity, the extension liquid ability of this lithium ion battery separator is 2-4 times of common micro-pore septum.
The high ultra-high molecular polyethylene lithium battery composite diaphragm of hanging the liquid ability of the present utility model, this composite diaphragm comprises: ultra high molecular polyethylene, micropore A, polyoxyethylene hydrophilic layer, micropore B; Micropore A is set on the ultra high molecular polyethylene, and the ultra high molecular polyethylene upper and lower surface arranges the polyoxyethylene hydrophilic layer, and micropore B is set on the polyoxyethylene hydrophilic layer.When composite diaphragm of the present utility model is worked in the electrolyte corrosive environment of battery, can keep good heat-resisting quantity and stability, thereby prolong the useful life of battery.Owing to hanging the raising of liquid ability, strengthened the performance of battery simultaneously, made the operation of lithium ion battery efficient stable.
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 (2)
1. the ultra-high molecular polyethylene lithium battery composite diaphragm of one kind high extension liquid ability is characterized in that, described composite diaphragm comprises: ultra high molecular polyethylene, micropore A, polyoxyethylene hydrophilic layer, micropore B;
Described micropore A is set on the described ultra high molecular polyethylene, and described ultra high molecular polyethylene upper and lower surface arranges described polyoxyethylene hydrophilic layer, and described micropore B is set on the described polyoxyethylene hydrophilic layer.
2. the high ultra-high molecular polyethylene lithium battery composite diaphragm of hanging the liquid ability as claimed in claim 1 is characterized in that, described micropore B is infundibulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204970342U CN202888280U (en) | 2012-09-24 | 2012-09-24 | High liquid adsorbing capacity composite diaphragm of ultra high molecular weight polyethylene (UHMWPE) lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204970342U CN202888280U (en) | 2012-09-24 | 2012-09-24 | High liquid adsorbing capacity composite diaphragm of ultra high molecular weight polyethylene (UHMWPE) lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202888280U true CN202888280U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012204970342U Expired - Fee Related CN202888280U (en) | 2012-09-24 | 2012-09-24 | High liquid adsorbing capacity composite diaphragm of ultra high molecular weight polyethylene (UHMWPE) lithium battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113764827A (en) * | 2021-09-07 | 2021-12-07 | 广东九彩新材料有限公司 | Microporous modified polypropylene lithium battery diaphragm and preparation method thereof |
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2012
- 2012-09-24 CN CN2012204970342U patent/CN202888280U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113764827A (en) * | 2021-09-07 | 2021-12-07 | 广东九彩新材料有限公司 | Microporous modified polypropylene lithium battery diaphragm and preparation method thereof |
| CN113764827B (en) * | 2021-09-07 | 2022-08-23 | 广东九彩新材料有限公司 | Microporous modified polypropylene lithium battery diaphragm and preparation method 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 |