CN203746951U - Lithium battery composite diaphragm - Google Patents
Lithium battery composite diaphragm Download PDFInfo
- Publication number
- CN203746951U CN203746951U CN201320864754.2U CN201320864754U CN203746951U CN 203746951 U CN203746951 U CN 203746951U CN 201320864754 U CN201320864754 U CN 201320864754U CN 203746951 U CN203746951 U CN 203746951U
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- China
- Prior art keywords
- layer
- reinforcement
- lithium battery
- layers
- polypropylene
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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 composite diaphragm which comprises an inorganic material layer, two polypropylene layers, reinforcement layers and magnetic material layers, wherein the inorganic material layer is sandwiched between the two polypropylene layers; one reinforcement layer is respectively arranged at the outer side of each polypropylene layer, and each reinforcement layer comprises a plurality of first reinforcing ribs arranged in parallel; and one magnetic material layer is respectively at the outer side of each reinforcement layer. According to the utility model, one reinforcement layer is respectively arranged at both sides of the two polypropylene layers, for example, the reinforcement layers may be made of a polyethylene material and be subjected to integral molding with the corresponding polypropylene layers. Thus, through the reinforcement layers, the strength of the lithium battery composite diaphragm is further improved. Meanwhile, by arranging the magnetic material layers, the hydrophilicity of the lithium battery composite diaphragm is also improved.
Description
Technical field
The utility model relates to lithium battery field, particularly a kind of composite diaphragm for lithium battery.
Background technology
Polypropylene diaphragm is the membrane manufacture that a kind of hot strength is high, resistance to elevated temperatures is good, is widely used in industrial production, for example composite diaphragm for lithium battery.This membrane manufacture need to have the ability that hinders electrical conductivity, prior art is normally added inorganic particulate material in polypropylene material, as titanium dioxide and earth silicon material, the ability that can reduce inside battery electric leakage under battery normal condition is general, runs under the emergency of high temperature or ambient pressure both positive and negative polarity short circuit easily occurs at battery.Reason is that the inorganic particulate of said polyolefins membrane configuration is generally distributed in membrane surface, is not distributed in barrier film inside, easily comes off in use.After improving in above-mentioned prior art, polyalkene diaphragm adopts nano aluminium oxide ceramic material as inorganic adding materials, has strengthened the intensity of membrane manufacture itself.
In addition, existing polyalkene diaphragm stretches inhomogeneous in process of production, causes barrier film intensity prepared by simple tension technique to decline, and affects the mechanical property of polyalkene diaphragm.
Utility model content
The utility model provides the composite diaphragm for lithium battery that a kind of intensity is high.
For addressing the above problem, as an aspect of the present utility model, provide a kind of composite diaphragm for lithium battery, comprising: inorganic material layer; Two polypropylene layers, inorganic material layer is clamped between two polypropylene layers; Reinforced layer, the outside of each polypropylene layer is provided with a reinforced layer, and each reinforced layer comprises multiple the first reinforcements that be arranged in parallel; Magnetic material layer, the outside of each reinforced layer is respectively arranged with a magnetic material layer.
Further, reinforced layer also comprises multiple the second reinforcements that be arranged in parallel, and the second reinforcement is vertical with the first reinforcement to be arranged.
Further, the part being exposed in the grid that the first reinforcement and the second reinforcement form of polypropylene layer offers multiple holes.
Further, the aperture in hole is 0.01 to 0.02 micron.
The utility model is provided with respectively a reinforced layer in the both sides of two polypropylene layers, and for example, this reinforced layer can be that polythene material is made, and one-body molded with corresponding described polypropylene layer.Like this, by reinforced layer, further improved the intensity of composite diaphragm for lithium battery.
Brief description of the drawings
Fig. 1 schematically shows structural representation of the present utility model.
Reference numeral in figure: 1, inorganic material layer; 2, polypropylene layer; 3, reinforced layer; 4, the first reinforcement; 5, the second reinforcement.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Please refer to Fig. 1, the utility model provides a kind of composite diaphragm for lithium battery, comprising: inorganic material layer 1; Two polypropylene layers 2, inorganic material layer 1 is clamped between two polypropylene layers 2; Reinforced layer 3, the outside of each polypropylene layer 2 is provided with a reinforced layer 3, and each reinforced layer 3 comprises multiple the first reinforcements 4 that be arranged in parallel; Magnetic material layer, the outside of each reinforced layer is respectively arranged with a magnetic material layer, for example, can be the outside that is coated in reinforced layer.
The utility model is provided with respectively a reinforced layer 3 in the both sides of two polypropylene layers 2, and for example, this reinforced layer 3 can be that polythene material is made, and one-body molded with corresponding described polypropylene layer 2.Like this, by reinforced layer 3, further improved the intensity of composite diaphragm for lithium battery.
Preferably, reinforced layer 3 also comprises multiple the second reinforcement 5, the second reinforcements 5 that be arranged in parallel and the vertical setting of the first reinforcement 4.Preferably, the part being exposed in the grid that the first reinforcement 4 and the second reinforcement 5 form of polypropylene layer 2 offers multiple holes.Preferably, the aperture in hole is 0.01 to 0.02 micron.
Preferably, reinforced layer 3 forms by etching.By the method for etching, can avoid using the problem of the demoulding difficulty that mould causes, the damage while having avoided the demoulding, has reduced cost.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. a composite diaphragm for lithium battery, is characterized in that, comprising:
Inorganic material layer (1);
Two polypropylene layers (2), described inorganic material layer (1) is clamped between described two polypropylene layers (2);
Reinforced layer (3), the outside of each described polypropylene layer (2) is provided with a described reinforced layer (3), and each described reinforced layer (3) comprises multiple the first reinforcements (4) that be arranged in parallel;
Magnetic material layer, the outside of each described reinforced layer is respectively arranged with a described magnetic material layer.
2. composite diaphragm for lithium battery according to claim 1, is characterized in that, described reinforced layer (3) also comprises multiple the second reinforcements (5) that be arranged in parallel, described the second reinforcement (5) setting vertical with described the first reinforcement (4).
3. composite diaphragm for lithium battery according to claim 1, is characterized in that, the part being exposed in the grid that described the first reinforcement (4) and the second reinforcement (5) form of described polypropylene layer (2) offers multiple holes.
4. composite diaphragm for lithium battery according to claim 3, is characterized in that, the aperture in described hole is 0.01 to 0.02 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320864754.2U CN203746951U (en) | 2013-12-24 | 2013-12-24 | Lithium battery composite diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320864754.2U CN203746951U (en) | 2013-12-24 | 2013-12-24 | Lithium battery composite diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203746951U true CN203746951U (en) | 2014-07-30 |
Family
ID=51346713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320864754.2U Expired - Fee Related CN203746951U (en) | 2013-12-24 | 2013-12-24 | Lithium battery composite diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203746951U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563666A (en) * | 2020-12-18 | 2021-03-26 | 芯科众联新材料(常州)有限公司 | Mixed amphiprotic agent of small-particle alumina powder and large-particle alumina powder and process flow |
-
2013
- 2013-12-24 CN CN201320864754.2U patent/CN203746951U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563666A (en) * | 2020-12-18 | 2021-03-26 | 芯科众联新材料(常州)有限公司 | Mixed amphiprotic agent of small-particle alumina powder and large-particle alumina powder and process flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151215 Address after: 332000 Chengxi port area, Jiujiang Development Zone, Jiangxi Patentee after: Jiujiang Lixin New Material Co., Ltd. Address before: 518000 Guangdong, Longgang, Buji Street Gan hang community Gan Eru No. 1 Giant silver science and Technology Industrial Park, plant No. 301, No. 2 Patentee before: ATOP New Materials Co., Ltd. |
|
| 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: 20140730 Termination date: 20191224 |