CN204348832U - A kind of extended-life lithium ion battery - Google Patents
A kind of extended-life lithium ion battery Download PDFInfo
- Publication number
- CN204348832U CN204348832U CN201420823486.4U CN201420823486U CN204348832U CN 204348832 U CN204348832 U CN 204348832U CN 201420823486 U CN201420823486 U CN 201420823486U CN 204348832 U CN204348832 U CN 204348832U
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- CN
- China
- Prior art keywords
- barrier film
- ion battery
- lithium ion
- macromolecule polypropylene
- polypropylene barrier
- 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
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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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- Secondary Cells (AREA)
- Cell Separators (AREA)
Abstract
The utility model discloses a kind of long-life lithium ion battery, this lithium ion battery comprises housing and is packaged in the lithium cell in described housing, the macromolecule polypropylene barrier film that described lithium cell comprises a positive plate, a negative plate and is arranged between described positive plate and negative plate, wherein, the thickness of described macromolecule polypropylene barrier film is 20 ~ 30 μm, described macromolecule polypropylene barrier film is distributed with the micropore in 0.03 ~ 0.1 μm, aperture, its porosity is 30% ~ 40%; The both sides of described macromolecule polypropylene barrier film are respectively arranged with the Al that a layer thickness is 2 ~ 4 μm
2o
3/ SiO
2composite ceramic coat; Described lithium cell is formed by described positive plate, negative plate and macromolecule polypropylene membrane winding.There is ceramic-coated separator there is superior thermal stability, effectively can improve the thermal safety energy of lithium ion battery, extend the life-span of lithium ion battery.
Description
Technical field
The utility model relates to secondary battery technology, is specifically related to a kind of long-life lithium ion battery.
Background technology
Serondary lithium battery has the advantages such as high-energy-density because of it, has become one of electric motor car main energy sources.Along with electrical vehicular power demand improves, electrokinetic cell energy density improves, and the power of battery exports demand and size also increases thereupon, causes and can produce more substantial heat when high-power battery operates.Due to the solvent that electrolyte is non-aqueous and inflammable, therefore, the lifting of inside battery part fail safe has absolute necessity, if cannot be got rid of by heat energy efficiently, battery temperature will be caused to rise.
How to prevent battery from causing solvent fires to be blasted because of overheated, safety assurance be one of important topic, therefore, each side make great efforts research pursue target be design a kind of lithium battery diaphragm.The major function of barrier film isolates both positive and negative polarity to prevent the problem such as battery self discharging and the two poles of the earth short circuit, and owing to being filled with the corrosion of electrolyte and the change of temperature in the operational environment of battery, therefore, the barrier film of lithium ion battery should have superior thermal stability.
Summary of the invention
In view of this, the utility model provides a kind of long-life lithium ion battery, this lithium ion battery comprises housing and is packaged in the lithium cell in described housing, the macromolecule polypropylene barrier film that described lithium cell comprises a positive plate, a negative plate and is arranged between described positive plate and negative plate, wherein, the thickness of described macromolecule polypropylene barrier film is 20 ~ 30 μm, described macromolecule polypropylene barrier film is distributed with the micropore in 0.03 ~ 0.1 μm, aperture, and its porosity is 30% ~ 40%; The both sides of described macromolecule polypropylene barrier film are respectively arranged with the Al that a layer thickness is 2 ~ 4 μm
2o
3/ SiO
2composite ceramic coat; Described lithium cell is formed by described positive plate, negative plate and macromolecule polypropylene membrane winding.
Preferably, described micropore is uniformly distributed on described macromolecule polypropylene barrier film.
Preferably, described micropore is the little symmetric shape in two broad in the middle.
Preferably, in described micropore, the diameter at maximum diameter of hole place is 0.06 ~ 0.1 μm, and the diameter at minimum-value aperture place is 0.03 ~ 0.06 μm.
Preferably, the thickness of described macromolecule polypropylene barrier film is 20 μm; The both sides of described macromolecule polypropylene barrier film are respectively arranged with the Al that a layer thickness is 4 μm
2o
3/ SiO
2composite ceramic coat.
Preferably, the thickness of described macromolecule polypropylene barrier film is 40 μm; The both sides of described macromolecule polypropylene barrier film are respectively arranged with the Al that a layer thickness is 2 μm
2o
3/ SiO
2composite ceramic coat.
Long-life lithium ion battery that the utility model provides, battery diaphragm wherein includes composite ceramic coat, there is ceramic-coated separator there is superior thermal stability, effectively can improve the thermal safety energy of lithium ion battery, extend the life-span of lithium ion battery.In addition, the ceramic coating of nano-scale particle, has higher specific area, makes the barrier film after applying have good wetability and water retainability to electrolyte, effectively can improve the capacity retention energy of lithium ion battery.In an embodiment wherein, the micropore that battery diaphragm distributes is the little symmetric shape in two broad in the middle, increases the volume of micropore, further increases the water retainability of battery diaphragm to electrolyte.
Accompanying drawing explanation
Fig. 1 is the structural representation of the lithium ion battery that the utility model embodiment provides.
Fig. 2 is the structural representation of the lithium cell that the utility model embodiment provides.
Fig. 3 is the structural representation of the macromolecule polypropylene barrier film that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be described in detail the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part example, instead of whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the utility model protection range.
Embodiment 1
Consult Fig. 1 and Fig. 2, present embodiments provide a kind of extended-life lithium ion battery, comprise housing 1 and be packaged in the lithium cell 2 in described housing 1.Wherein, the macromolecule polypropylene barrier film 23 that described lithium cell 2 comprises positive plate 21, negative plate 22 and is arranged between described positive plate 21 and negative plate 22, lithium cell 2 is reeled by described positive plate 21, negative plate 22 and macromolecule polypropylene barrier film 23 and is formed.
Wherein, macromolecule polypropylene barrier film 23 is evenly distributed with columned micropore, porosity is 30% ~ 40%; The scope that the thickness of macromolecule polypropylene barrier film 23 can be selected is 20 ~ 30 μm, and the aperture of micropore is 0.03 ~ 0.1 μm.
As shown in Figure 2, in the present embodiment, the both sides of macromolecule polypropylene barrier film 23 are respectively arranged with one deck Al
2o
3/ SiO
2composite ceramic coat 24.That is, one deck Al is provided with between positive plate 21 and macromolecule polypropylene barrier film 23
2o
3/ SiO
2composite ceramic coat 24, is also provided with one deck Al between negative plate 22 and macromolecule polypropylene barrier film 23
2o
3/ SiO
2composite ceramic coat 24.The comparatively preferred scope of thickness of composite ceramic coat 24 is 2 ~ 4 μm.
The lithium ion battery that the present embodiment provides, the both sides of macromolecule polypropylene barrier film are respectively arranged with one deck Al
2o
3/ SiO
2composite ceramic coat, has ceramic-coated separator and has superior thermal stability, effectively can improve the thermal safety energy of lithium ion battery, extend the life-span of lithium ion battery.In addition, the ceramic coating of nano-scale particle, has higher specific area, makes the barrier film after applying have good wetability and water retainability to electrolyte, effectively can improve the capacity retention energy of lithium ion battery, extend the life-span of lithium ion battery further.
Embodiment 2
The lithium ion battery that the present embodiment provides, as different from Example 1, consults Fig. 3, and the micropore 231 be distributed on macromolecule polypropylene barrier film 23 is the little symmetric shape in two broad in the middle.In micropore 231, the diameter of maximum diameter of hole place (in the middle of micropore) can be chosen as 0.06 ~ 0.1 μm, and the diameter at minimum-value aperture place (micropore two ends) can be chosen as 0.03 ~ 0.06 μm.
In the lithium ion battery that the present embodiment provides, on barrier film, micropore is the little symmetric shape in two broad in the middle, increases the volume of micropore, further increases the water retainability of battery diaphragm to electrolyte.
The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection range of the application.
Claims (6)
1. an extended-life lithium ion battery, comprise housing (1) and be packaged in the lithium cell (2) in described housing (1), described lithium cell (2) comprises a positive plate (21), one negative plate (22) and the macromolecule polypropylene barrier film (23) be arranged between described positive plate (21) and negative plate (22), it is characterized in that, the thickness of described macromolecule polypropylene barrier film (23) is 20 ~ 30 μm, described macromolecule polypropylene barrier film (23) is distributed with the micropore (231) in 0.03 ~ 0.1 μm, aperture, its porosity is 30% ~ 40%, the both sides of described macromolecule polypropylene barrier film (23) are respectively arranged with the Al that a layer thickness is 2 ~ 4 μm
2o
3/ SiO
2composite ceramic coat (24), described lithium cell (2) is reeled by described positive plate (21), negative plate (22) and macromolecule polypropylene barrier film (23) and is formed.
2. extended-life lithium ion battery according to claim 1, is characterized in that, described micropore (231) is uniformly distributed on described macromolecule polypropylene barrier film (23).
3. extended-life lithium ion battery according to claim 2, is characterized in that, the symmetric shape that described micropore (231) is little in two broad in the middle.
4. extended-life lithium ion battery according to claim 3, is characterized in that, in described micropore (231), the diameter at maximum diameter of hole place is 0.06 ~ 0.1 μm, and the diameter at minimum-value aperture place is 0.03 ~ 0.06 μm.
5., according to the arbitrary described extended-life lithium ion battery of claim 1-4, it is characterized in that, the thickness of described macromolecule polypropylene barrier film (23) is 20 μm; The both sides of described macromolecule polypropylene barrier film (23) are respectively arranged with the Al that a layer thickness is 4 μm
2o
3/ SiO
2composite ceramic coat (24).
6., according to the arbitrary described extended-life lithium ion battery of claim 1-4, it is characterized in that, the thickness of described macromolecule polypropylene barrier film (23) is 40 μm; The both sides of described macromolecule polypropylene barrier film (23) are respectively arranged with the Al that a layer thickness is 2 μm
2o
3/ SiO
2composite ceramic coat (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420823486.4U CN204348832U (en) | 2014-12-23 | 2014-12-23 | A kind of extended-life lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420823486.4U CN204348832U (en) | 2014-12-23 | 2014-12-23 | A kind of extended-life lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204348832U true CN204348832U (en) | 2015-05-20 |
Family
ID=53232083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420823486.4U Expired - Fee Related CN204348832U (en) | 2014-12-23 | 2014-12-23 | A kind of extended-life lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204348832U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183231A (en) * | 2017-11-30 | 2018-06-19 | 深圳市卓能新能源股份有限公司 | Lithium ion battery with high charging upper limit voltage and preparation method thereof |
| CN110265611A (en) * | 2018-03-12 | 2019-09-20 | 江苏海基新能源股份有限公司 | High-multiplying-power battery diaphragm and lithium ion secondary battery |
-
2014
- 2014-12-23 CN CN201420823486.4U patent/CN204348832U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183231A (en) * | 2017-11-30 | 2018-06-19 | 深圳市卓能新能源股份有限公司 | Lithium ion battery with high charging upper limit voltage and preparation method thereof |
| CN110265611A (en) * | 2018-03-12 | 2019-09-20 | 江苏海基新能源股份有限公司 | High-multiplying-power battery diaphragm and lithium ion secondary battery |
| CN110265611B (en) * | 2018-03-12 | 2024-03-08 | 江苏海基新能源股份有限公司 | High-rate battery diaphragm and lithium ion secondary battery |
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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: 20160606 Address after: Guangming Gongming street Shenzhen city Guangdong province 518000 water port industrial zone sixth xufa Science Park Building 7, building 3 floor 3A Patentee after: SHENZHEN RED FAIRY PRECISION TECHNOLOGY CO., LTD. Address before: 518109, Guangdong, Longhua Province, Shenzhen New District, big wave street, the same wins community, Cloth Dragon Road, Baiyun Mountain village, elephant company, plant No. 1-4, 4, 5, 1-5 Patentee before: SHENZHEN TIANSHENG WEIYE TECHNOLOGY 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: 20150520 Termination date: 20171223 |