CN204857823U - Lithium battery separator - Google Patents
Lithium battery separator Download PDFInfo
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- CN204857823U CN204857823U CN201520518218.6U CN201520518218U CN204857823U CN 204857823 U CN204857823 U CN 204857823U CN 201520518218 U CN201520518218 U CN 201520518218U CN 204857823 U CN204857823 U CN 204857823U
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- polyolefin porous
- lithium battery
- thickness
- inorganic
- porous separator
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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 provides a lithium battery separator belongs to lithium battery technology field. It has solved not high temperature resistance problem of current lithium battery separator. This lithium battery separator includes that polyolefin porous septum, coating are platelike inorganic particle sublayer at the inorganic coating and the coating of polyolefin porous septum lower surface at polyolefin porous septum upper surface, the thickness that inorganic coating's material is ceramic material and inorganic coating is 3um, and the thickness of polyolefin porous septum is 8um, and the thickness that is stained with gel micropore polymer film and inorganic particle sublayer on inorganic particle sublayer be 2um, and a cross -section in hole is wavy line on the polyolefin porous septum. The utility model has the advantages of simple structure, high temperature resistant.
Description
Technical field
The utility model belongs to technical field of lithium batteries, particularly a kind of lithium battery diaphragm.
Background technology
In the structure of lithium battery, barrier film is one of interior layer assembly of key.The performance of barrier film determines the interfacial structure, internal resistance etc. of battery, directly affects the characteristics such as the capacity of battery, circulation and security performance, and the barrier film of excellent performance has important effect to the combination property improving battery.The Main Function of barrier film is that the positive and negative electrode of battery is separated, and prevents the two poles of the earth from contacting and short circuit, has the function that electrolyte ion can be made to pass through in addition.Barrier film material is nonconducting, and the performance of its physicochemical properties to battery has a great impact.The kind of battery is different, and the barrier film of employing is also different.Lithium battery isolation membrane of the prior art, often because technology is not mature enough, usually can go out the problem of lithium battery blast, and its main cause is that lithium battery exists very large deficiency in high temperature resistant.
Summary of the invention
The purpose of this utility model there are the problems referred to above for existing technology, proposes simple, the resistant to elevated temperatures lithium battery diaphragm of a kind of structure.
The purpose of this utility model realizes by following technical proposal: a kind of lithium battery diaphragm, it is characterized in that, comprise polyolefin porous separator, be coated on the inorganic coating of polyolefin porous separator lower surface and be coated on the inorganic particles sublayer that polyolefin porous separator upper surface is tabular, the material of described inorganic coating is ceramic material and the thickness of inorganic coating is 3um, the thickness of polyolefin porous separator is 8um, inorganic particles sublayer is stained with gel microporous polymer membranes and the thickness of inorganic particles sublayer is 2um, on polyolefin porous separator, the shaft section in hole is wave.
Compared with prior art, the utility model comprises polyolefin porous separator, the upper surface of polyolefin porous separator is coated with the inorganic particles sublayer of tabular, the lower surface of polyolefin porous separator is coated with the inorganic coating that ceramic material is made, even so at high temperature this barrier film thermal expansion phenomenon very little, still its shape can be kept, the hidden danger of blast can not be there is, improve the security performance of lithium battery, the inorganic coating thickness of 3um significantly can improve thermal stability and the mechanical performance of barrier film simultaneously, inorganic coating one-tenth-value thickness 1/10 is too little, be unfavorable for the thermal stability improving barrier film, inorganic coating one-tenth-value thickness 1/10 is too high, the energy density of battery can be reduced.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1, gel microporous polymer membranes; 2, inorganic particles sublayer; 3, polyolefin porous separator; 4, inorganic coating.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, this lithium battery diaphragm comprises polyolefin porous separator 3, is coated on the inorganic coating 4 of polyolefin porous separator 3 lower surface and is coated on the inorganic particles sublayer 2 that polyolefin porous separator 3 upper surface is tabular, the material of described inorganic coating 4 is ceramic material and the thickness of inorganic coating 4 is 3um, the thickness of polyolefin porous separator 3 is 8um, inorganic particles sublayer 2 is stained with gel microporous polymer membranes 1 and the thickness of inorganic particles sublayer 2 is 2um, on polyolefin porous separator 3, the shaft section in hole is wave.
The upper surface of polyolefin porous separator 3 is coated with the inorganic particles sublayer 2 of tabular, the lower surface of polyolefin porous separator 3 is coated with the inorganic coating 4 that ceramic material is made, even so at high temperature this barrier film thermal expansion phenomenon very little, still its shape can be kept, the hidden danger of blast can not be there is, improve the security performance of lithium battery, barrier film has superior heat-stability and mechanical performance simultaneously, significantly can improve the hardness of battery, energy density and security performance.
Inorganic coating 4 thickness of 3um significantly can improve thermal stability and the mechanical performance of barrier film, and inorganic coating 4 one-tenth-value thickness 1/10 is too little, is unfavorable for the thermal stability improving barrier film, and inorganic coating 4 one-tenth-value thickness 1/10 is too high, can reduce the energy density of battery.
The inorganic ceramic material be coated on polyolefin porous separator 3 can improve thermal stability and the mechanical performance of barrier film.
This lithium battery diaphragm of making of apertured polymeric film is adopted not only to have the feature of the high voltage of liquid lithium battery battery core, long circulation life, discharging voltage balance and cleanliness without any pollution.And eliminating the potential safety hazard of the blast that liquid lithium battery exists, profile is more flexibly simultaneously, conveniently, weight is lighter and handier.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (1)
1. a lithium battery diaphragm, it is characterized in that, comprise polyolefin porous separator, be coated on the inorganic coating of polyolefin porous separator lower surface and be coated on the inorganic particles sublayer that polyolefin porous separator upper surface is tabular, the material of described inorganic coating is ceramic material and the thickness of inorganic coating is 3um, the thickness of polyolefin porous separator is 8um, inorganic particles sublayer is stained with gel microporous polymer membranes and the thickness of inorganic particles sublayer is 2um, on polyolefin porous separator, the shaft section in hole is wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520518218.6U CN204857823U (en) | 2015-07-16 | 2015-07-16 | Lithium battery separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520518218.6U CN204857823U (en) | 2015-07-16 | 2015-07-16 | Lithium battery separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204857823U true CN204857823U (en) | 2015-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520518218.6U Active CN204857823U (en) | 2015-07-16 | 2015-07-16 | Lithium battery separator |
Country Status (1)
| Country | Link |
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| CN (1) | CN204857823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953058A (en) * | 2017-04-10 | 2017-07-14 | 天津中科先进技术研究院有限公司 | Lithium ion battery diaphragm |
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2015
- 2015-07-16 CN CN201520518218.6U patent/CN204857823U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953058A (en) * | 2017-04-10 | 2017-07-14 | 天津中科先进技术研究院有限公司 | Lithium ion battery diaphragm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |