CN202905830U - Lithium ion power battery isolating membrane - Google Patents
Lithium ion power battery isolating membrane Download PDFInfo
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- CN202905830U CN202905830U CN2012203423926U CN201220342392U CN202905830U CN 202905830 U CN202905830 U CN 202905830U CN 2012203423926 U CN2012203423926 U CN 2012203423926U CN 201220342392 U CN201220342392 U CN 201220342392U CN 202905830 U CN202905830 U CN 202905830U
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- power battery
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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 discloses a lithium ion power battery isolating membrane, which comprises a microporous base membrane layer (1) and is characterized in that the upper surface and the lower surface of the microporeous base membrane layer (1) are respectively coated with barium sulfate ceramic coatings (2). After the isolating membrane disclosed by the utility model, a positive pole material and a negative pole material are laminated, an electrolytic solution is filled, the isolating membrane has good MD/TD extension and high puncture strength when being applied to the lithium ion power battery, no micro short circuit is formed, high electrolytic solution saturation amount can be formed in the lithium ion battery, 3-10% of electrolytic solution can be added additionally, the service life of the lithium ion power battery is significantly improved, the cycle life is prolonged, the charge-discharge ratio is increased, and the service life of a lithium ion power battery produced by the same process can be prolonged by 40%; and the hole-closing temperature of the lithium ion power battery is increased, and the safety of the battery is improved.
Description
Technical field
The utility model relates to a kind of barrier film, especially a kind of lithium-ion-power cell barrier film.Belong to the battery isolating film preparing technical field.
Background technology
Along with the progress of electronic industry, battery also is widely used in every aspect, such as mobile phone, notebook computer etc.Therefore, the demand of battery is increasing continuously, and fail safe also has been subject to attention in enhancing efficiency.And lithium-ion-power cell mainly partly is comprised of both positive and negative polarity, electrolyte, barrier film etc., and it is outstanding that it has high-energy-density etc., now become one of main energy source of electric motor car.But the lithium-ion-power cell running time can produce a large amount of heat energy, can't effectively heat energy be discharged, and causes battery temperature to rise and the problem of short, poor stability of life-span occurs.Therefore, barrier film plays vital effect to lithium-ion-power cell, and it avoids two electrodes to produce the contact of physical property between both positive and negative polarity, can promote battery security.
The utility model content
The purpose of this utility model is in order to solve above-mentioned the deficiencies in the prior art, but provides a kind of extending battery life, increase the lithium-ion-power cell barrier film of battery security.
The purpose of this utility model can reach by the following technical programs:
The lithium-ion-power cell barrier film comprises the micropore basal membrane layer, and its design feature is: upper surface and lower surface at described micropore basal membrane layer are coated with respectively the barium sulfate ceramic coating.
A kind of embodiment of the present utility model is: described micropore basal membrane layer can be the film layer structure of porous polyethylene layer, porous polypropylene layer, superelevation porous polypropylene layer or porous polyvinylidene fluoride layer.
A kind of embodiment of the present utility model is: the thickness of described porous polyethylene layer, porous polypropylene layer, superelevation porous polypropylene layer or porous polyvinylidene fluoride layer can be 20 μ m, 25 μ m, 30 μ m or 40 μ m.
A kind of embodiment of the present utility model is: the composite film structure that described micropore basal membrane layer can be comprised of two-layer porous polyethylene layer and porous polypropylene layer or superelevation porous polypropylene layer, described two-layer porous polyethylene layer sticks on respectively upper surface and the lower surface of porous polypropylene layer or superelevation porous polypropylene layer.
A kind of embodiment of the present utility model is: the thickness of described porous polyethylene layer can be 5 μ m, and the thickness of described porous polypropylene layer or superelevation porous polypropylene layer is 10 μ m, 15 μ m, 20 μ m or 30 μ m.
A kind of embodiment of the present utility model is: the thickness of described barium sulfate ceramic coating can be 3 μ m～5 μ m.
The utlity model has following outstanding beneficial effect:
1, behind barrier film of the present utility model and positive electrode and the negative material lamination, filling electrolyte, being applied to have in the lithium-ion-power cell good MD/TD extends and high puncture intensity, form without micro-short circuit, in lithium ion battery, can form the full liquid measure of high electrolyte, can add 3～10% electrolyte more, significantly improve the lithium-ion-power cell life-span, prolong cycle life, improve charge-discharge magnification, can be so that the lithium ion battery that same process is produced prolongs for 40% life-span; The closed pore temperature of lithium-ion-power cell is improved, increase the fail safe of battery.
2, barrier film of the present utility model is produced yield because the low surface tension of barium sulfate improves the coiling of battery, and coating raw material major part to make land used be domestic raw materials, will greatly reduce the cost of domestic lithium-ion-power cell.
Description of drawings
Fig. 1 is the structure cutaway view of the utility model specific embodiment 1.
Fig. 2 is the structure cutaway view of the utility model specific embodiment 3.
Embodiment
Specific embodiment 1:
With reference to Fig. 1, the present embodiment comprises micropore basal membrane layer 1, is coated with respectively barium sulfate ceramic coating 2 at upper surface and the lower surface of described micropore basal membrane layer 1.
In the present embodiment, described micropore basal membrane layer 1 is the film layer structure of porous polyethylene layer, porous polypropylene layer, superelevation porous polypropylene layer or porous polyvinylidene fluoride layer.The thickness of described porous polyethylene layer, porous polypropylene layer, superelevation porous polypropylene layer or porous polyvinylidene fluoride layer is 20 μ m.The thickness of described barium sulfate ceramic coating 2 is 3 μ m～5 μ m.
Specific embodiment 2:
The main feature of the present embodiment is: the thickness of described porous polyethylene layer, porous polypropylene layer, superelevation porous polypropylene layer or porous polyvinylidene fluoride layer is 25 μ m, 30 μ m or 40 μ m.All the other are with specific embodiment 1.
Specific embodiment 3:
With reference to Fig. 2, the composite film structure that described micropore basal membrane layer 1 is comprised of two-layer porous polyethylene layer and porous polypropylene layer, described two-layer porous polyethylene layer sticks on respectively upper surface and the lower surface of porous polypropylene layer or superelevation porous polypropylene layer.
In the present embodiment, the thickness of described porous polyethylene layer is 5 μ m, and the thickness of described porous polypropylene layer is 10 μ m.
Specific embodiment 4:
The main feature of the present embodiment is: described micropore basal membrane layer 1 is by the composite film structure of two-layer porous polyethylene layer and superelevation porous polypropylene layer, and described two-layer porous polyethylene layer sticks on respectively upper surface and the lower surface of superelevation porous polypropylene layer.All the other are with specific embodiment 3.
Specific embodiment 5:
Main feature in the present embodiment is: the composite film structure that described micropore basal membrane layer 1 is comprised of two-layer porous polyethylene layer and porous polypropylene layer or superelevation porous polypropylene layer.The thickness of described porous polypropylene layer or superelevation porous polypropylene layer is 15 μ m, 20 μ m or 25 μ m.All the other are with specific embodiment 3 or 4.
Behind the barrier film of the present embodiment and positive electrode and the negative material lamination, filling electrolyte, being applied to have in the lithium-ion-power cell good MD/TD extends and high puncture intensity, form without micro-short circuit, in lithium ion battery, can form the full liquid measure of high electrolyte, can add 3～10% electrolyte more, significantly improve the lithium-ion-power cell life-span, prolong cycle life, improve charge-discharge magnification, can be so that the lithium ion battery that same process is produced prolongs for 40% life-span; The closed pore temperature of lithium-ion-power cell is improved, increase the fail safe of battery.
The above; it only is the better specific embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, all belonged to protection range of the present utility model.
Claims (6)
1. a lithium-ion-power cell barrier film comprises micropore basal membrane layer (1), it is characterized in that: upper surface and lower surface at described micropore basal membrane layer (1) respectively are coated with a barium sulfate ceramic coating (2).
2. a kind of lithium-ion-power cell barrier film according to claim 1 is characterized in that: described micropore basal membrane layer (1) is the film layer structure of porous polyethylene layer, porous polypropylene layer, superelevation porous polypropylene layer or porous polyvinylidene fluoride layer.
3. a kind of lithium-ion-power cell barrier film according to claim 2, it is characterized in that: the thickness of described micropore basal membrane layer (1) is 20 μ m, 25 μ m, 30 μ m or 40 μ m.
4. a kind of lithium-ion-power cell barrier film according to claim 1, it is characterized in that: the composite film structure of described micropore basal membrane layer (1) for being comprised of two-layer porous polyethylene layer and porous polypropylene layer or superelevation porous polypropylene layer, described two-layer porous polyethylene layer sticks on respectively upper surface and the lower surface of porous polypropylene layer or superelevation porous polypropylene layer.
5. a kind of lithium-ion-power cell barrier film according to claim 4, it is characterized in that: the thickness of described porous polyethylene layer is 5 μ m, the thickness of described porous polypropylene layer or superelevation porous polypropylene layer is 10 μ m, 15 μ m, 20 μ m or 30 μ m.
6. the described a kind of lithium-ion-power cell barrier film of arbitrary claim according to claim 1-5, it is characterized in that: the thickness of described barium sulfate ceramic coating (2) is 3 μ m～5 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203423926U CN202905830U (en) | 2012-07-15 | 2012-07-15 | Lithium ion power battery isolating membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203423926U CN202905830U (en) | 2012-07-15 | 2012-07-15 | Lithium ion power battery isolating membrane |
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| Publication Number | Publication Date |
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| CN202905830U true CN202905830U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012203423926U Expired - Fee Related CN202905830U (en) | 2012-07-15 | 2012-07-15 | Lithium ion power battery isolating membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11264677B2 (en) | 2018-06-06 | 2022-03-01 | Ningde Amperex Technology Limited | Separator and electrochemical device |
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2012
- 2012-07-15 CN CN2012203423926U patent/CN202905830U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11264677B2 (en) | 2018-06-06 | 2022-03-01 | Ningde Amperex Technology Limited | Separator and electrochemical device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20170715 |
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| CF01 | Termination of patent right due to non-payment of annual fee |