CN202888296U - Ultra-high-molecular-weight polyethylene composite diaphragm for high-performance lithium battery - Google Patents
Ultra-high-molecular-weight polyethylene composite diaphragm for high-performance lithium battery Download PDFInfo
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- CN202888296U CN202888296U CN2012205236873U CN201220523687U CN202888296U CN 202888296 U CN202888296 U CN 202888296U CN 2012205236873 U CN2012205236873 U CN 2012205236873U CN 201220523687 U CN201220523687 U CN 201220523687U CN 202888296 U CN202888296 U CN 202888296U
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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
Abstract
The utility model discloses an ultra-high-molecular-weight polyethylene composite diaphragm for a high-performance lithium battery. The composite diaphragm comprises an ultra-high-molecular-weight polyethylene diaphragm, micro holes, polyoxyethylene hydrophilic layers and polyvinylidene fluoride coating layers, wherein the micro holes are formed in the ultra-high-molecular-weight polyethylene diaphragm, the polyoxyethylene hydrophilic layers are arranged at the upper surface and the lower surface of the ultra-high-molecular-weight polyethylene diaphragm, and the polyvinylidene fluoride coating layers are arranged at the surfaces of the polyoxyethylene hydrophilic layers. According to the ultra-high-molecular-weight polyethylene composite diaphragm for the high-performance lithium battery, the ultra-high-molecular-weight polyethylene composite diaphragm for a high-temperature lithium battery is prepared by uniformly coating polyvinylidene fluoride and polyoxyethylene onto the diaphragm, the temperature tolerance and the security of the diaphragm are improved, and the performance of the lithium battery is further improved.
Description
Technical field
The utility model belongs to polymeric material field, relates in particular to a kind of high-performance lithium battery ultra high molecular polyethylene composite diaphragm.
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 battery diaphragm 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
The purpose of this utility model is to utilize at a kind of high-performance lithium battery ultra high molecular polyethylene composite diaphragm, and it is relatively poor to be intended to solve the stability in use that has lithium battery diaphragm now, is unfavorable for the problem of use of the long-term stability of battery.
The purpose of this utility model is to provide a kind of high-performance lithium battery ultra high molecular polyethylene composite diaphragm, and described composite diaphragm comprises: ultra high molecular polyethylene barrier film, micropore, polyoxyethylene hydrophilic layer, Kynoar coat; On the described ultra high molecular polyethylene barrier film described micropore is set, described ultra high molecular polyethylene barrier film upper and lower surface arranges described polyoxyethylene hydrophilic layer, and described polyoxyethylene hydrophilic layer surface arranges described Kynoar coat.
Further, the aperture of described micropore is 0.026-0.038 μ m.
Further, described ultra high molecular polyethylene membrane thicknesses is 12-38 μ m.
High-performance lithium battery ultra high molecular polyethylene composite diaphragm of the present utility model, this composite diaphragm comprises: ultra high molecular polyethylene barrier film, micropore, polyoxyethylene hydrophilic layer, Kynoar coat; On the ultra high molecular polyethylene barrier film micropore is set, ultra high molecular polyethylene barrier film upper and lower surface arranges the polyoxyethylene hydrophilic layer, and polyoxyethylene hydrophilic layer surface arranges the Kynoar coat.High-performance lithium battery of the present utility model adopts the Kynoar coat can make barrier film have heat-resisting quantity and fail safe (barrier film holes temperature＞200 degrees centigrade) with the ultra high molecular polyethylene composite diaphragm, hot strength (＞150Mpa), make the working temperature of the applicable High Temperature Lithium Cell of barrier film; But the hydrophilic nmature of the polyoxyethylene coat Effective Raise membrane surface that adopts, simultaneously Kynoar (PVDF) is again auxiliary material in the battery core processing procedure and compatible with the lithium cell chemical system, apply barrier film and can not affect the general charge-discharge performance of lithium battery, and can adsorb electrolyte, these characteristics can further wetting barrier films and are increased the barrier film liquid absorption, promote the lithium battery performance.
Description of drawings
Fig. 1 is the high-performance lithium battery that provides of the utility model with the structural representation of ultra high molecular polyethylene composite diaphragm.
Among the figure: 1, ultra high molecular polyethylene barrier film; 11, micropore; 2, polyoxyethylene hydrophilic layer; 3, Kynoar coat.
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 high-performance lithium battery ultra high molecular polyethylene composite diaphragm, and this composite diaphragm comprises: ultra high molecular polyethylene barrier film, micropore, polyoxyethylene hydrophilic layer, Kynoar coat; On the ultra high molecular polyethylene barrier film micropore is set, ultra high molecular polyethylene barrier film upper and lower surface arranges the polyoxyethylene hydrophilic layer, and polyoxyethylene hydrophilic layer surface arranges the Kynoar coat.
As the prioritization scheme of the utility model embodiment, the aperture of micropore is 0.026-0.038 μ m.
As the prioritization scheme of the utility model embodiment, the ultra high molecular polyethylene membrane thicknesses is 12-38 μ m.
Referring to accompanying drawing 1, the utility model high-performance lithium battery is described in further detail with the ultra high molecular polyethylene composite diaphragm.
The high-performance lithium battery of this programme invention utilizes Kynoar and polyoxyethylene evenly to be coated on the barrier film with ultra high molecular polyethylene composite diaphragm 1, makes High Temperature Lithium Cell ultra high molecular polyethylene composite diaphragm 1.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 polyethylene barrier film 1 thickness adopts 12-38 μ m; Upper and lower surface at ultra high molecular polyethylene barrier film 1 is respectively arranged with polyoxyethylene hydrophilic layer 2; Be provided with Kynoar coat 3 on polyoxyethylene hydrophilic layer 2 surfaces, coat adopts poly-inclined to one side fluorine more than 300,000.
High-performance lithium battery ultra high molecular polyethylene composite diaphragm of the present utility model, this composite diaphragm comprises: ultra high molecular polyethylene barrier film, micropore, polyoxyethylene hydrophilic layer, Kynoar coat; On the ultra high molecular polyethylene barrier film micropore is set, ultra high molecular polyethylene barrier film upper and lower surface arranges the polyoxyethylene hydrophilic layer, and polyoxyethylene hydrophilic layer surface arranges the Kynoar coat.High-performance lithium battery of the present utility model adopts the Kynoar coat can make barrier film have heat-resisting quantity and fail safe (barrier film holes temperature＞2000 degrees centigrade with the ultra high molecular polyethylene composite diaphragm, hot strength (＞150Mpa), make the working temperature of the applicable High Temperature Lithium Cell of barrier film; But the hydrophilic nmature of the polyoxyethylene coat Effective Raise membrane surface that adopts, simultaneously Kynoar (PVDF) is again auxiliary material in the battery core processing procedure and compatible with the lithium cell chemical system, apply barrier film and can not affect the general charge-discharge performance of lithium battery, and can adsorb electrolyte, these characteristics can further wetting barrier films and are increased the barrier film liquid absorption, promote the lithium 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-performance lithium battery ultra high molecular polyethylene composite diaphragm is characterized in that described composite diaphragm comprises: ultra high molecular polyethylene barrier film, micropore, polyoxyethylene hydrophilic layer, Kynoar coat;
On the described ultra high molecular polyethylene barrier film described micropore is set, described ultra high molecular polyethylene barrier film upper and lower surface arranges described polyoxyethylene hydrophilic layer, and described polyoxyethylene hydrophilic layer surface arranges described Kynoar coat.
2. high-performance lithium battery ultra high molecular polyethylene composite diaphragm as claimed in claim 1 is characterized in that, the aperture of described micropore is 0.026-0.038 μ m.
3. high-performance lithium battery ultra high molecular polyethylene composite diaphragm as claimed in claim 1 is characterized in that, described ultra high molecular polyethylene membrane thicknesses is 12-38 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205236873U CN202888296U (en) | 2012-10-15 | 2012-10-15 | Ultra-high-molecular-weight polyethylene composite diaphragm for high-performance lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012205236873U CN202888296U (en) | 2012-10-15 | 2012-10-15 | Ultra-high-molecular-weight polyethylene composite diaphragm for high-performance lithium battery |
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| CN202888296U true CN202888296U (en) | 2013-04-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124415A (en) * | 2013-04-28 | 2014-10-29 | 深圳华粤宝电池有限公司 | Composite gel polymer electrolyte as well as preparation method and application thereof |
| CN109546058A (en) * | 2017-09-22 | 2019-03-29 | 丰田自动车株式会社 | Nonaqueous electrolytic solution secondary battery partition |
| WO2019091462A1 (en) * | 2017-11-13 | 2019-05-16 | 比亚迪股份有限公司 | Polymer membrane, manufacturing method therefor, and lithium-ion battery |
| CN110120485A (en) * | 2018-02-06 | 2019-08-13 | 比亚迪股份有限公司 | Membrane for polymer and its preparation method and application and lithium ion battery and preparation method thereof |
| CN110416467A (en) * | 2018-04-28 | 2019-11-05 | 比亚迪股份有限公司 | Membrane for polymer and its preparation method and application and lithium ion battery and preparation method thereof |
-
2012
- 2012-10-15 CN CN2012205236873U patent/CN202888296U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124415A (en) * | 2013-04-28 | 2014-10-29 | 深圳华粤宝电池有限公司 | Composite gel polymer electrolyte as well as preparation method and application thereof |
| CN109546058A (en) * | 2017-09-22 | 2019-03-29 | 丰田自动车株式会社 | Nonaqueous electrolytic solution secondary battery partition |
| CN109546058B (en) * | 2017-09-22 | 2021-08-13 | 丰田自动车株式会社 | Separator for non-aqueous electrolyte secondary battery |
| WO2019091462A1 (en) * | 2017-11-13 | 2019-05-16 | 比亚迪股份有限公司 | Polymer membrane, manufacturing method therefor, and lithium-ion battery |
| CN109786629A (en) * | 2017-11-13 | 2019-05-21 | 比亚迪股份有限公司 | Membrane for polymer and its preparation method and application and lithium ion battery and preparation method thereof |
| CN109786629B (en) * | 2017-11-13 | 2021-06-18 | 比亚迪股份有限公司 | Polymer diaphragm and preparation method and application thereof, and lithium ion battery and preparation method thereof |
| CN110120485A (en) * | 2018-02-06 | 2019-08-13 | 比亚迪股份有限公司 | Membrane for polymer and its preparation method and application and lithium ion battery and preparation method thereof |
| CN110120485B (en) * | 2018-02-06 | 2021-06-18 | 比亚迪股份有限公司 | Polymer diaphragm and preparation method and application thereof, and lithium ion battery and preparation method thereof |
| US11824225B2 (en) | 2018-02-06 | 2023-11-21 | Byd Company Limited | Separator including substrate, hydrophilic blocking layer, and polar polymer bonding with nodal structure, and method of preparing the same |
| CN110416467A (en) * | 2018-04-28 | 2019-11-05 | 比亚迪股份有限公司 | Membrane for polymer and its preparation method and application and lithium ion battery and preparation method thereof |
| CN110416467B (en) * | 2018-04-28 | 2021-06-18 | 比亚迪股份有限公司 | Polymer diaphragm and preparation method and application thereof, and lithium ion battery and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20181015 |
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| CF01 | Termination of patent right due to non-payment of annual fee |