CN207338502U - A kind of modified lithium battery diaphragm - Google Patents
A kind of modified lithium battery diaphragm Download PDFInfo
- Publication number
- CN207338502U CN207338502U CN201721317331.3U CN201721317331U CN207338502U CN 207338502 U CN207338502 U CN 207338502U CN 201721317331 U CN201721317331 U CN 201721317331U CN 207338502 U CN207338502 U CN 207338502U
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- China
- Prior art keywords
- lithium battery
- wedge
- material layer
- polyolefin layers
- shaped micropore
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Abstract
The utility model discloses a kind of modified lithium battery diaphragm, including：Polyolefin layers, polyoxyethylene material layer, wedge-shaped micropore, the polyolefin layers upper and lower surface is provided with polystyrene material layer, wedge-shaped micropore is uniformly provided with polyolefin layers, the polyolefine material layer thickness is 9 20 μm, and the wedge-shaped micropore is in hourglass shape.The macromolecule polyolefin layers of the utility model improve the imbibition rate and guarantor's liquid rate to electrolyte using wedge-shaped micropore.The stability of lithium battery performance is improved using macromolecule polyolefin layers, and polystyrene material layer is set on surface, the migration rate of lithium ion is improved, further improves the charging and discharging capabilities of lithium battery, is very helpful to lithium battery integrated performance boost tool.
Description
Technical field
Lithium battery diaphragm technical field is the utility model is related to, is specially a kind of modified lithium battery diaphragm.
Background technology
Membrane is one of lithium battery main material, and the material being currently mainly used is simple polyolefin, including poly- second
Alkene (PE), polypropylene (PP) or the two is compound, have certain tensile strength, and have preferable heat resistance, and PP materials melt
Up to 165 DEG C of point, PE materials can also the long-time service under the environment below 130 DEG C；The two by solvent extraction or can blow heat
Stretching forms micropore in the case of wind；Also have the advantages that good electrical insulating property, easy processing are molded, are cheap at the same time.Lithium
Battery diaphragm production is mainly had using method：1st, blowing hot-air pulling method (dry method)：The method hole density and pore size control are more difficult, micro-
The hole uniformity is not good enough.2nd, solution extraction (wet method)：The method speed of production is slow, and cost is higher, and extractant residual is not easy
Remove clean influence diaphragm electrochemical performance.Both microporous barrier extension liquid (electrolyte of film absorption) abilities are general, therefore to electricity
It is also general to solve imbibition rate and the guarantor's liquid rate of liquid, is unfavorable for the high rate performance and service life cycle of battery.
Utility model content
The purpose of this utility model is to provide a kind of modified lithium battery diaphragm, to solve to propose in above-mentioned background technology
The problem of.Aim to solve the problem that microporous barrier present in existing lithium battery diaphragm hangs liquid (electrolyte of film absorption) scarce capacity, lifting
Imbibition rate and guarantor's liquid rate to electrolyte, lift the high rate performance and service life cycle of battery.
To achieve the above object, the utility model provides following technical solution：A kind of modified lithium battery diaphragm, including：
Polyolefin layers, polyoxyethylene material layer, wedge-shaped micropore, the polyolefin layers upper and lower surface are provided with polystyrene
Material layer, is uniformly provided with wedge-shaped micropore on polyolefin layers.
Further, the polyolefine material layer thickness is 9-20 μm.
Further, the wedge-shaped micropore is in hourglass shape.
Compared with prior art, the beneficial effects of the utility model are：The lithium battery diaphragm of the utility model, there is provided wedge
Shape micropore, improves the extension liquid energy power of membrane, imbibition rate and guarantor's liquid rate to electrolyte is improved, so as to improve times of battery
Rate performance and service life cycle.There is good mechanical strength and resistance to elevated temperatures, energy using macromolecule polyolefin layers
Stable use characteristic is kept in temperature change when the corrosive environment of enough electrolyte in the battery and use, so as to improve
The stability of lithium battery performance, and polystyrene material layer is set on surface, the lipophile of membrane surface is improved, is expanded
The contact interface of membrane and electrolyte, improves the migration rate of lithium ion, further improves the charge and discharge electric energy of lithium battery
Power, is very helpful lithium battery integrated performance boost tool.With good market popularization value.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
In figure：1- polyolefin layers；2- polystyrene material layers；3- wedge shape micropores.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the utility model provides a kind of modified lithium battery diaphragm, including：Polyolefin layers 1, gather
Ethylene oxide material layer 2, wedge-shaped micropore 3,1 upper and lower surface of polyolefin layers are provided with polystyrene material layer 2, polyene
Wedge-shaped micropore 3 is uniformly provided with hydrocarbon material layer 1.
Further, 1 thickness of polyolefin layers is 9-20 μm.
Further, the wedge-shaped micropore 3 is in hourglass shape.
Operation principle：The lithium battery diaphragm of the utility model, there is provided wedge-shaped micropore, improves the extension liquid energy power of membrane,
The imbibition rate and guarantor's liquid rate to electrolyte are improved, so as to improve the high rate performance and service life cycle of battery.Use height
Molecule polyolefin layers have good mechanical strength and resistance to elevated temperatures, the corrosive environment of electrolyte that can be in the battery
The stable use characteristic with holding in temperature change when using, so that the stability of lithium battery performance is improved, and
Surface sets polystyrene material layer, improves the lipophile of membrane surface, expands the contact interface of membrane and electrolyte, carry
The migration rate of lithium ion has been risen, has further improved the charging and discharging capabilities of lithium battery, has been had to lithium battery integrated performance boost
Very big help.
While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from the principle of the utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of modified lithium battery diaphragm, including：Polyolefin layers (1), polyoxyethylene material layer (2), wedge-shaped micropore
(3), it is characterised in that：Described polyolefin layers (1) upper and lower surface is provided with polystyrene material layer (2), polyolefin material
Wedge-shaped micropore (3) is uniformly provided with the bed of material (1).
A kind of 2. modified lithium battery diaphragm according to claim 1, it is characterised in that：The polyolefin layers
(1) thickness is 9-20 μm.
A kind of 3. modified lithium battery diaphragm according to claim 1, it is characterised in that：The wedge-shaped micropore (3) is in
Hourglass shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721317331.3U CN207338502U (en) | 2017-10-12 | 2017-10-12 | A kind of modified lithium battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721317331.3U CN207338502U (en) | 2017-10-12 | 2017-10-12 | A kind of modified lithium battery diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207338502U true CN207338502U (en) | 2018-05-08 |
Family
ID=62367966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721317331.3U Expired - Fee Related CN207338502U (en) | 2017-10-12 | 2017-10-12 | A kind of modified lithium battery diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207338502U (en) |
-
2017
- 2017-10-12 CN CN201721317331.3U patent/CN207338502U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180508 Termination date: 20191012 |