CN206703652U - A kind of compound lithium battery diaphragm - Google Patents
A kind of compound lithium battery diaphragm Download PDFInfo
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- CN206703652U CN206703652U CN201720296222.1U CN201720296222U CN206703652U CN 206703652 U CN206703652 U CN 206703652U CN 201720296222 U CN201720296222 U CN 201720296222U CN 206703652 U CN206703652 U CN 206703652U
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- layer
- outer layer
- micropore
- internal layer
- lithium battery
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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
A kind of compound lithium battery diaphragm is the utility model is related to, is made up of outer layer, sandwich layer and internal layer, sandwich layer is provided between outer layer and internal layer.Outer layer and internal layer are polyolefin porous membrane, truncated cone shape micropore are evenly provided with outer layer and internal layer, sandwich layer is microporous cellulose membrane, uniformly over using cylindrical micropore.The both ends of cylindrical micropore are connected with two truncated cone shape micropores respectively.The beneficial effects of the utility model are：This compound lithium battery diaphragm is made up of outer layer, sandwich layer and internal layer, and mechanical strength is big, and service life length, chemical stability will get well, and has a high ionic conductivity, heat endurance with to automatically shut down protective value good.
Description
Technical field
Microporous barrier field is the utility model is related to, more particularly to a kind of compound lithium battery diaphragm.
Background technology
The diaphragm material commonly used in battery is usually the microporous membrane made from cellulose or braid, synthetic resin.Lithium
Ion battery typically has polypropylene (PP) and polyethylene using high intensity, the polyolefin-based porous film of filming, conventional barrier film
(PE) micro-pore septum, and the copolymer of propylene and ethene, Natene etc., wherein with Celgard companies production every
Film is representative.In recent years, polymer dielectric is had been achieved with into commercialization for lithium ion battery, polymer dielectric lithium from
It is both the passage of Ion transfer in sub- battery, plays the barrier film effect between positive and negative pole material again.In the structure of lithium battery, barrier film is
One of crucial interior layer assembly.The performance of barrier film determines the interfacial structure of battery, internal resistance etc., directly affect battery capacity,
Circulation and the characteristic such as security performance, the barrier film of excellent performance have the function that important to the combination property for improving battery.Barrier film
Main function be that the positive and negative electrode for making battery is separated, prevent the two poles of the earth contact and it is short-circuit, additionally with can make electrolyte from
The function that son passes through.Barrier film material is nonconducting, and its physicochemical properties has a great impact to the performance of battery.Battery
Species is different, and the barrier film of use is also different.For lithium battery series, because electrolyte is organic solvent system, thus need
The diaphragm material of organic solvent-resistant, the general polyolefin porous membrane for using high-strength thin-film.
The content of the invention
It is big that the purpose of this utility model is to provide a kind of mechanical strength, and service life length, chemical stability will get well, and have height
Ionic conductivity compound lithium battery diaphragm.
Technical scheme is used by the utility model solves its technical problem：
A kind of compound lithium battery diaphragm, is made up of outer layer, sandwich layer and internal layer, and sandwich layer is provided between outer layer and internal layer.
Outer layer and internal layer are polyolefin porous membrane, and truncated cone shape micropore is evenly provided with outer layer and internal layer, and sandwich layer is microporous fire-retardant
Cellulosic separator, uniformly over using cylindrical micropore, the electrolyte imbibition characteristic having had, high ionic conductivity and excellent
Different electrochemical interface performance, drastically increase the high rate performance, long circulation life and security performance of lithium battery.On sandwich layer
The both ends of cylindrical micropore are connected with the truncated cone shape micropore on outer layer, internal layer respectively, both with high ionic conductivity, have again
High electrochemical stability.
The beneficial effects of the utility model are：This compound lithium battery diaphragm is made up of outer layer, sandwich layer and internal layer, and machinery is strong
Degree is big, and service life length, chemical stability will get well, and has a high ionic conductivity, heat endurance with automatically shut down protective value
It is good.
Brief description of the drawings：
Fig. 1 is structural representation of the present utility model.
In figure：1 outer layer, 2 sandwich layers, 3 internal layers, 4 truncated cone shape micropores, 5 truncated cone shape micropores, 6 cylindrical micropores.
Embodiment：
As shown in figure 1, a kind of compound lithium battery diaphragm, by outer layer（1）, sandwich layer（2）And internal layer（3）Composition, in outer layer
（1）And internal layer（3）Between be provided with sandwich layer（2）, outer layer（1）And internal layer（3）For polyolefin porous membrane.The outer layer（1）It is upper uniform
Ground is provided with truncated cone shape micropore（4）, internal layer（3）On be evenly provided with truncated cone shape micropore（5）, sandwich layer（2）For microporous fire-retardant fibre
Plain barrier film is tieed up, uniformly over using cylindrical micropore（6）.With good electrolyte imbibition characteristic, high ionic conductivity and
Excellent electrochemical interface performance, drastically increase the high rate performance, long circulation life and security performance of lithium battery.Sandwich layer
（2）On cylindrical micropore（6）One end and outer layer（1）On truncated cone shape micropore（4）It is connected, the other end and internal layer（3）On
Truncated cone shape micropore（5）It is connected.Both there is high ionic conductivity, there is high electrochemical stability again.
Claims (2)
- A kind of 1. compound lithium battery diaphragm, by outer layer（1）, sandwich layer（2）And internal layer（3）Composition, in outer layer（1）And internal layer（3） Between be provided with sandwich layer（2）, outer layer（1）And internal layer（3）For polyolefin porous membrane, it is characterized in that：The outer layer（1）On equably set There is truncated cone shape micropore（4）, internal layer（3）On be evenly provided with truncated cone shape micropore（5）, sandwich layer（2）For microporous fire-retardant cellulose Barrier film, uniformly over using cylindrical micropore（6）.
- 2. compound lithium battery diaphragm according to claim 1, it is characterized in that：The sandwich layer（2）On cylindrical micropore （6）One end and outer layer（1）On truncated cone shape micropore（4）It is connected, the other end and internal layer（3）On truncated cone shape micropore（5）Phase Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720296222.1U CN206703652U (en) | 2017-03-24 | 2017-03-24 | A kind of compound lithium battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720296222.1U CN206703652U (en) | 2017-03-24 | 2017-03-24 | A kind of compound lithium battery diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206703652U true CN206703652U (en) | 2017-12-05 |
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ID=60467108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720296222.1U Active CN206703652U (en) | 2017-03-24 | 2017-03-24 | A kind of compound lithium battery diaphragm |
Country Status (1)
| Country | Link |
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| CN (1) | CN206703652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109148801A (en) * | 2018-09-20 | 2019-01-04 | 南京世界村汽车动力有限公司 | A kind of lithium ion battery separator of composite battery core |
-
2017
- 2017-03-24 CN CN201720296222.1U patent/CN206703652U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109148801A (en) * | 2018-09-20 | 2019-01-04 | 南京世界村汽车动力有限公司 | A kind of lithium ion battery separator of composite battery core |
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