CN207474559U - A kind of lithium ion battery separator with high-liquid absorbing rate - Google Patents
A kind of lithium ion battery separator with high-liquid absorbing rate Download PDFInfo
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- CN207474559U CN207474559U CN201721527683.1U CN201721527683U CN207474559U CN 207474559 U CN207474559 U CN 207474559U CN 201721527683 U CN201721527683 U CN 201721527683U CN 207474559 U CN207474559 U CN 207474559U
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- Prior art keywords
- lithium ion
- liquid absorbing
- ion battery
- gel coat
- absorbing rate
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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 belongs to technical field of lithium ion, more particularly to a kind of lithium ion battery separator with high-liquid absorbing rate, including porous basement membrane and coated in the gel coat being made of copolymer polypropylene acid esters particle and bonding agent in the porous basement membrane at least one side, the imbibition rate of the gel coat is the 1000 ~ 5000% of dry mass.Compared with the prior art, the utility model is by having the gel coat of high-liquid absorbing rate in porous coating on base films, on the one hand, gel coat significantly improves the absorptivity of electrolyte, make to remain without liquid electrolyte in battery, so as to effectively improve the imbibition of battery and water retainability, and then improve the cycle life of battery；On the other hand, battery can be effectively improved by the security performance under the abuse conditions such as high temperature, puncture, shock, extruding by coating the gel coat being made of copolymer polypropylene acid esters particle and bonding agent.
Description
Technical field
The utility model belongs to technical field of lithium ion more particularly to a kind of lithium ion battery with high-liquid absorbing rate
Diaphragm.
Background technology
Lithium ion battery is since commercialization, since its energy density is high, operating voltage is big, memory-less effect, recycles the longevity
It orders the advantages that long and is widely used as the power supply of various mobile equipment.Wherein, the critical piece of lithium ion battery includes anode, bears
Pole, isolation film and electrolyte, isolation film are spaced between positive and negative anodes, major function：On the one hand, it is physically isolated lithium ion battery
Positive and negative anodes, prevent short circuit occurred inside；On the other hand, ensure lithium ion by electrolyte uniformly, freely travel to and fro between positive and negative anodes
Between.
Wherein, the existing diaphragm liquid absorption amount containing ceramic coating or PVDF coatings is less, and general liquid absorption amount can only achieve pottery
The 30% ~ 60% of porcelain dry coating weight amount so that also have the residual of liquid electrolyte in battery, so as to cause battery safety and follow
Ring performance cannot ensure.
Utility model content
The purpose of this utility model is that：In view of the deficiencies of the prior art, it provides a kind of with high-liquid absorbing rate, high guarantor's liquid
Performance, while can effectively ensure that the lithium ion battery separator of battery safety under abuse.
To achieve these goals, the utility model is adopted the following technical scheme that：
A kind of lithium ion battery separator with high-liquid absorbing rate, including porous basement membrane and coated in the porous basement membrane at least
The gel coat being made of copolymer polypropylene acid esters particle and bonding agent on one side, the imbibition rate of the gel coat is itself
The 1000 ~ 5000% of dry weight.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the porous base
Ceramic coating is additionally provided between film and the gel coat.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the ceramics apply
The thickness of layer is 1 ~ 15 μm.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the porous base
The thickness of film is 5 ~ 30 μm.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the gel applies
The thickness of layer is 1 ~ 15 μm.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the porous base
The porosity of film is 30~60%.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the gel applies
The porosity of layer is 40~80%.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the porous base
Film is polyolefin film or polyimide film.
As a kind of improvement of the lithium ion battery separator described in the utility model with high-liquid absorbing rate, the ceramics apply
Layer is silica dioxide coating, aluminum oxide coating, zirconia coating, beryllium oxide coating, aluminium nitride coating, silicon nitride apply
Layer, coat of silicon carbide or vanadium trioxide coating.
The beneficial effects of the utility model are：A kind of lithium ion battery separator with high-liquid absorbing rate of the utility model,
Including porous basement membrane and coated in being made of copolymer polypropylene acid esters particle with bonding agent in the porous basement membrane at least one side
Gel coat, the imbibition rate of the gel coat is the 1000 ~ 5000% of dry mass.Compared with the prior art, this practicality
It is novel by porous coating on base films have high-liquid absorbing rate gel coat, on the one hand, absorption of the gel coat to electrolyte
Rate significantly improves, and makes to remain without liquid electrolyte in battery, so as to effectively improve the imbibition of battery and water retainability, and then improve
The cycle life of battery；On the other hand, coating the gel coat being made of copolymer polypropylene acid esters particle with bonding agent can have
Effect improves battery by the security performance under the abuse conditions such as high temperature, puncture, shock, extruding.
Description of the drawings
Fig. 1 is one of structure diagram of the utility model.
Fig. 2 is the second structural representation of the utility model.
In figure：The porous basement membranes of 1-；2- gel coats；3- ceramic coatings.
Specific embodiment
With reference to embodiment and Figure of description, the utility model is described in further detail, but this practicality
Novel embodiment is without being limited thereto.
As shown in Figure 1, a kind of lithium ion battery separator with high-liquid absorbing rate, including porous basement membrane 1 and coated in porous
The gel coat 2 being made of copolymer polypropylene acid esters particle and bonding agent in 1 at least one side of basement membrane, the imbibition of gel coat 2
Rate is the 1000 ~ 5000% of dry mass.
Wherein, porous basement membrane 1 is polyolefin film or polyimide film；Copolymer polypropylene acid esters particle is a kind of cross-linking type third
Olefin(e) acid lipin polymer particle, acrylic acid esters co-polymer particle can be polymethyl acrylate, polyethyl acrylate, polypropylene
One or more of acid butyl ester, polymethyl methacrylate, polyethyl methacrylate；Wherein acrylic acid esters co-polymer
The degree of cross linking of grain is 5 ~ 40%, and grain diameter is 0.1 ~ 10 μm.
Compared with the prior art, the utility model on porous basement membrane 1 by coating the gel coat with high-liquid absorbing rate
2, on the one hand, gel coat 2 significantly improves the absorptivity of electrolyte, makes to remain without liquid electrolyte in battery, so as to effectively
Imbibition and the water retainability of battery are improved, and then improves the cycle life of battery；On the other hand, it coats by copolymer polypropylene acid esters
The gel coat 2 of particle and bonding agent composition can effectively improve battery by abuse conditions such as high temperature, puncture, shock, extruding
Under security performance.
In an embodiment of the lithium ion battery separator according to the present utility model with high-liquid absorbing rate, as shown in Fig. 2,
Ceramic coating 3 is additionally provided between porous basement membrane 1 and gel coat 2, ceramic coating 3 can be silica dioxide coating, three oxidations
Two aluminized coatings, zirconia coating, beryllium oxide coating, aluminium nitride coating, silicon nitride coating, coat of silicon carbide or vanadium trioxide
Coating；By setting ceramic coating 3, the mechanical performance and heat resistance of diaphragm entirety can be effectively improved, so as to further carry
The safety of high battery and cycle performance.
In an embodiment of the lithium ion battery separator according to the present utility model with high-liquid absorbing rate, ceramic coating 3
Thickness be 1 ~ 15 μm.
In an embodiment of the lithium ion battery separator according to the present utility model with high-liquid absorbing rate, porous basement membrane 1
Thickness for 5 ~ 30 μm, the thickness of gel coat 2 is 1 ~ 15 μm.
In an embodiment of the lithium ion battery separator according to the present utility model with high-liquid absorbing rate, porous basement membrane 1
Porosity for 30~60%, the porosity of gel coat 2 is 40~80%.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is changed.Therefore, the utility model is not limited to specific embodiment disclosed and described above, right
Some modifications and changes of the utility model should also be as falling into the scope of the claims of the utility model.In addition, to the greatest extent
Some specific terms are used in pipe this specification, but these terms are merely for convenience of description, not to the utility model
Form any restrictions.
Claims (8)
1. a kind of lithium ion battery separator with high-liquid absorbing rate, it is characterised in that：Including porous basement membrane and coated in described more
The gel coat being made of copolymer acrylate particle and bonding agent in the basement membrane at least one side of hole, the imbibition of the gel coat
Rate is the 1000 ~ 5000% of dry mass.
2. the lithium ion battery separator according to claim 1 with high-liquid absorbing rate, it is characterised in that：The porous basement membrane
Ceramic coating is additionally provided between the gel coat.
3. the lithium ion battery separator according to claim 2 with high-liquid absorbing rate, it is characterised in that：The ceramic coating
Thickness be 1 ~ 15 μm.
4. the lithium ion battery separator according to claim 1 with high-liquid absorbing rate, it is characterised in that：The porous basement membrane
Thickness be 5 ~ 30 μm.
5. the lithium ion battery separator according to claim 1 with high-liquid absorbing rate, it is characterised in that：The gel coat
Thickness be 1 ~ 15 μm.
6. the lithium ion battery separator according to claim 1 with high-liquid absorbing rate, it is characterised in that：The porous basement membrane
Porosity be 30~60%.
7. the lithium ion battery separator according to claim 1 with high-liquid absorbing rate, it is characterised in that：The gel coat
Porosity be 40~80%.
8. the lithium ion battery separator according to claim 1 with high-liquid absorbing rate, it is characterised in that：The porous basement membrane
For polyolefin film or polyimide film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721527683.1U CN207474559U (en) | 2017-11-16 | 2017-11-16 | A kind of lithium ion battery separator with high-liquid absorbing rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721527683.1U CN207474559U (en) | 2017-11-16 | 2017-11-16 | A kind of lithium ion battery separator with high-liquid absorbing rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207474559U true CN207474559U (en) | 2018-06-08 |
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ID=62260868
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721527683.1U Active CN207474559U (en) | 2017-11-16 | 2017-11-16 | A kind of lithium ion battery separator with high-liquid absorbing rate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933875A (en) * | 2020-06-29 | 2020-11-13 | 宁波新思创机电科技股份有限公司 | Ternary soft-package polymer automobile start-stop battery |
| CN112599841A (en) * | 2020-12-15 | 2021-04-02 | 厦门海辰新能源科技有限公司 | Liquid storage membrane, preparation method thereof and lithium ion battery with liquid storage membrane |
| WO2023273652A1 (en) * | 2021-07-02 | 2023-01-05 | 宁德时代新能源科技股份有限公司 | Diaphragm, lithium-ion battery, battery module, battery pack and power device |
-
2017
- 2017-11-16 CN CN201721527683.1U patent/CN207474559U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933875A (en) * | 2020-06-29 | 2020-11-13 | 宁波新思创机电科技股份有限公司 | Ternary soft-package polymer automobile start-stop battery |
| CN112599841A (en) * | 2020-12-15 | 2021-04-02 | 厦门海辰新能源科技有限公司 | Liquid storage membrane, preparation method thereof and lithium ion battery with liquid storage membrane |
| CN112599841B (en) * | 2020-12-15 | 2022-02-22 | 厦门海辰新能源科技有限公司 | Liquid storage membrane, preparation method thereof and lithium ion battery with liquid storage membrane |
| WO2023273652A1 (en) * | 2021-07-02 | 2023-01-05 | 宁德时代新能源科技股份有限公司 | Diaphragm, lithium-ion battery, battery module, battery pack and power device |
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