CN206370459U - A kind of lithium ion battery separator - Google Patents
A kind of lithium ion battery separator Download PDFInfo
- Publication number
- CN206370459U CN206370459U CN201720022498.0U CN201720022498U CN206370459U CN 206370459 U CN206370459 U CN 206370459U CN 201720022498 U CN201720022498 U CN 201720022498U CN 206370459 U CN206370459 U CN 206370459U
- Authority
- CN
- China
- Prior art keywords
- staple fibers
- lithium ion
- hollow core
- core staple
- hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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 provides a kind of lithium ion battery separator, is made up of the hollow core staple fibers of many parallel arrangements, the length direction of hollow core staple fibers is perpendicular to the surface of barrier film.The utility model proposes membrane configuration, due to the presence of chopped fiber, increased considerably the mechanical degree of barrier film, compressive resistance is increased substantially；Hollow core staple fibers structure is employed, lithium ion diffusional resistance reduces, and effectively reduces the internal resistance of battery；The regularity of this membrane configuration can be achieved effective control, it is to avoid the formation of Micro porosity, be conducive to preventing both positive and negative polarity short circuit, improved the level of security of battery.
Description
Technical field
The utility model belongs to secondary cell field, and in particular to a kind of membrane configuration of lithium ion battery.
Background technology
The application of lithium ion battery is increasingly extensive.Barrier film is one of important component of lithium ion battery.In recent years, it is domestic
Barrier film increasingly instead of into diaphragma of mouth, the rising of occupation rate of market year by year.Lithium ion battery separator has a large amount of tortuous insertions
Micropore, ensure that electrolyte ion passes freely through to form charging and discharging circuit, and the positive pole of battery and negative pole by barrier film separate with
Prevent it from directly contacting and short-circuit.
The manufacturing process of barrier film has dry method, wet method and non-woven fabrics craft etc..Wherein, dry method is the method using mechanical stretching
Micropore is formed, wet method is to carry out pore-creating, the lithium battery of current commercialization by adding pore-creating material re-evaporation or the method washed off
Barrier film is mainly MIcroporous polyolefin film.Non-woven fabrics is that barrier film is made using unordered fiber stack.The barrier film that process above is made
Simple, the low cost and other advantages with technique.But there is also some problems, such as mechanical strength and heat-resisting quantity are poor, it is impossible to keep away
Exempt from large-scale through hole, the danger that there is both positive and negative polarity short circuit.
Utility model content
In place of in view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of lithium ion of new structure
Battery diaphragm, using hollow core staple fibers, with binding agent formation network structure.Hollow core staple fibers length is membrane thicknesses.
The concrete technical scheme for realizing the utility model purpose is：
A kind of lithium ion battery separator, is made up of, the length side of hollow core staple fibers the hollow core staple fibers of many parallel arrangements
To the surface perpendicular to barrier film.
Further, the hollow core staple fibers are hollow polyethylene fibre or hollow polypropylene fibres, the hollow short fibre
The length of dimension is 5-40 microns.
Wherein, it is bonded between the hollow core staple fibers of many parallel arrangements by bonding agent, the bonding agent is poly- four
One kind in PVF, Kynoar, butadiene-styrene rubber.
The beneficial effects of the utility model are：
The utility model proposes membrane configuration,
1, due to the presence of chopped fiber, the mechanical degree of barrier film is increased considerably, compressive resistance is increased substantially；
2, hollow core staple fibers structure is employed, lithium ion diffusional resistance reduces, and effectively reduces the internal resistance of battery；
3, the regularity of this structure can be achieved effective control, it is to avoid the formation of Micro porosity, be conducive to preventing just
Negative pole short circuit, improves the level of security of battery.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the structure of lithium ion battery separator of the utility model.
Fig. 2 is a kind of dimensional structure diagram of the structure of lithium ion battery separator of the utility model.
In figure, 1. hollow core staple fibers, the hollow space of 2. chopped fibers, 3. binding agents.
Embodiment
Now illustrate the utility model with following most preferred embodiment, but be not limited to scope of the present utility model.
With reference to the accompanying drawings and examples, embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not limited to scope of the present utility model.
, it is necessary to explanation, term " transverse direction ", " vertical ", " level ", " top ", " bottom " in description of the present utility model
The orientation or position relationship of the instructions such as " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be for only for ease of and retouch
State the utility model and simplify and describe, rather than indicate or imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
Embodiment 1
Such as Fig. 1 and Fig. 2, a kind of lithium ion battery separator is made up of the hollow core staple fibers 1 of many parallel arrangements, hollow short
The length direction of fiber is perpendicular to the surface of barrier film.(vertical arrow represents the thickness direction of barrier film in Fig. 1).With hollow knot
The chopped fiber of structure, to be arranged perpendicular to the direction of membrane surface.The hollow space 2 of chopped fiber, can play conducting lithium ions and
The effect of electrolyte.Binding agent 3 is used to connect chopped fiber, forms network structure.
The hollow core staple fibers are hollow polypropylene fibres, and the length of fiber is 20 microns (i.e. thickness of barrier film).It is described
It is bonded between the hollow core staple fibers of many parallel arrangements by bonding agent, the bonding agent is Kynoar.
The preparation process of this membrane configuration is：By many hollow long fibres combination arrangements, with nozzle by bonding agent equably
Fiber surface is sprayed on, the position of spraying is as shown in Figure 1, it is ensured that there are two adhesive spots on every fiber；It is many that the second layer is put again
The hollow long fibre of root.So it is bonded layer by layer, makes to be evenly distributed bonding agent between fiber, the fiber group needed for being formed
It is fit.After being spontaneously dried Deng assembly, cut in vertical fibers length direction, the film of thickness needed for obtaining.
Embodiment 2
A kind of lithium ion battery separator, is made up of the hollow core staple fibers 1 of many parallel arrangements, and the hollow core staple fibers are poly- second
Alkene fiber.The length direction of hollow core staple fibers 1 is perpendicular to the surface of barrier film.(vertical arrow represents the thickness side of barrier film in Fig. 1
To).Chopped fiber with hollow structure, to be arranged perpendicular to the direction of membrane surface.The hollow space 2, Ke Yiqi of chopped fiber
To the effect of conducting lithium ions and electrolyte.Binding agent 3 is used to connect chopped fiber, forms network structure.
The length of the hollow core staple fibers is 9 microns (i.e. thickness of barrier film).The hollow short fibre of many parallel arrangements
It is bonded between dimension by bonding agent, the bonding agent is polytetrafluoroethylene (PTFE).
The preparation process of this membrane configuration is：The preparation process of this membrane configuration is：By many hollow long fibre combination rows
Cloth, is uniformly coated to fiber surface, then put many hollow long fibres of the second layer with brush by bonding agent.So in layer
Ground is bonded, and makes to be evenly distributed bonding agent between fiber, the fibre assemblies needed for being formed.After being spontaneously dried Deng assembly,
Cut in vertical fibers length direction, the film of thickness needed for obtaining.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and replacement can also be made, these change
Enter and replace and also should be regarded as protection domain of the present utility model.
Claims (3)
1. a kind of lithium ion battery separator, it is characterised in that be made up of the hollow core staple fibers of many parallel arrangements, hollow core staple fibers
Length direction perpendicular to the surface of barrier film.
2. lithium ion battery separator according to claim 1, it is characterised in that the hollow core staple fibers are hollow polyethylene
Fiber or hollow polypropylene fibres, the length of the hollow core staple fibers is 5-40 microns.
3. lithium ion battery separator according to claim 1, it is characterised in that the hollow short fibre of many parallel arrangements
It is bonded between dimension by bonding agent, the bonding agent is one kind in polytetrafluoroethylene (PTFE), Kynoar, butadiene-styrene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720022498.0U CN206370459U (en) | 2017-01-09 | 2017-01-09 | A kind of lithium ion battery separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720022498.0U CN206370459U (en) | 2017-01-09 | 2017-01-09 | A kind of lithium ion battery separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206370459U true CN206370459U (en) | 2017-08-01 |
Family
ID=59390700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720022498.0U Expired - Fee Related CN206370459U (en) | 2017-01-09 | 2017-01-09 | A kind of lithium ion battery separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206370459U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341977A (en) * | 2020-03-23 | 2020-06-26 | 成都新柯力化工科技有限公司 | Diaphragm for new energy automobile power lithium battery and preparation method |
-
2017
- 2017-01-09 CN CN201720022498.0U patent/CN206370459U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341977A (en) * | 2020-03-23 | 2020-06-26 | 成都新柯力化工科技有限公司 | Diaphragm for new energy automobile power lithium battery and preparation method |
| CN111341977B (en) * | 2020-03-23 | 2021-08-27 | 李龙德 | Diaphragm for new energy automobile power lithium battery and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311486A (en) | Organic-inorganic composite membrane as well as preparation and application thereof | |
| CN101913862B (en) | Composite membrane for lithium ion battery and lithium ion battery using same | |
| CN103603178B (en) | Coating for flexible lithium-ion battery membrane, membrane containing same and preparation method thereof | |
| CN103560219B (en) | A kind of with the preparation method of the poly-dopamine ceramic diaphragm that is binding agent | |
| CN106784624B (en) | A kind of based lithium-ion battery positive plate and preparation method thereof | |
| CN208706747U (en) | A kind of lithium ion battery ceramic coating membrane | |
| CN102468494A (en) | All-vanadium redox flow battery electrode and preparation method thereof, and all-vanadium redox flow battery | |
| CN105568555A (en) | Preparation method of air filtering graphene fiber membrane | |
| CN111192994A (en) | Heat-shrinkage-resistant polyethylene lithium battery diaphragm and preparation method thereof | |
| CN206370459U (en) | A kind of lithium ion battery separator | |
| CN206059487U (en) | A kind of MULTILAYER COMPOSITE AGM dividing plate | |
| CN109817869A (en) | A kind of lithium ion battery separator and preparation method thereof | |
| CN206401415U (en) | A kind of diaphragm of power lithium ion battery | |
| US2810775A (en) | Plate separator for storage batteries | |
| CN106981607A (en) | A kind of lithium ion battery separator and preparation method thereof | |
| CN106257708A (en) | A kind of anti-short circuit AGM dividing plate | |
| CN108695473A (en) | Lithium ion battery separator and preparation method thereof | |
| CN104377329B (en) | Heat-resistant flame-retardant diaphragm and preparing method thereof | |
| CN105355981A (en) | Manufacturing method for lithium-sulfur battery | |
| CN203967160U (en) | A kind of novel lithium battery barrier film | |
| CN207572441U (en) | Ceramic coated composite diaphragm for lithium battery | |
| CN204289580U (en) | A kind of nonwoven fabrics macromolecular material structure of composite membrane | |
| CN109860489A (en) | A kind of lithium ion battery separator, preparation method and lithium ion battery | |
| CN205723721U (en) | A kind of from fire-retardant lithium ion battery separator | |
| CN103972448A (en) | Electrochemical power supply diaphragm and preparation method thereof, and electrochemical battery or capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170801 Termination date: 20200109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |