CN2932631Y - Polymer lithium ion battery diaphragm - Google Patents
Polymer lithium ion battery diaphragm Download PDFInfo
- Publication number
- CN2932631Y CN2932631Y CNU2006201025261U CN200620102526U CN2932631Y CN 2932631 Y CN2932631 Y CN 2932631Y CN U2006201025261 U CNU2006201025261 U CN U2006201025261U CN 200620102526 U CN200620102526 U CN 200620102526U CN 2932631 Y CN2932631 Y CN 2932631Y
- Authority
- CN
- China
- Prior art keywords
- battery
- diaphragm
- polymer lithium
- lithium ion
- conducting hole
- 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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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
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- Cell Separators (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to a polymer lithium ion battery diaphragm which has a conducting hole. The utility model is characterized in that the conducting hole on the diaphragm surface of the polymer lithium ion battery diaphragm is a conducting hole which is homogeneously distributed and similar to a round. In the technical projects of the battery diaphragm the conducting hole on the diaphragm surface of the battery is similar to a round and distributes homogeneously. The conducting hole has the advantages that firstly, the permeability is good and the value of the permeating degree Gurley is less than 40S, and secondly, the mechanical strength is high, the mechanics capability is perfect, the tear resistance capacity is strong so that the diaphragm is not easy to be tore when winding the battery, thereby being able to avoid the micro short circuit phenomenon inside the battery and simultaneously be convenient to assemble the battery.
Description
Technical field
The utility model relates to polymer lithium cell diaphragm.
Background technology
Lithium ion battery has the specific energy height, and it is long to recycle the life-span, and characteristics such as volume is little, light weight, security performance height, is used widely at aspects such as mobile communication, notebook computers.Along with the development of material science, lithium battery can reduce cost, and further can use in electric motor car.Polymer Li-ion battery adopts stacked system assembled battery, polymer Li-ion battery yin, yang pole piece and electrolyte membrance are by the compound integral body that becomes of heat, therefore, barrier film is the key component in the lithium ion battery, and the via in the barrier film plays an important role to the performance of battery again.It is long and narrow etc. irregular that the barrier film via pass of existing lithium ion battery is, exist inhomogeneous, reason such as the transverse and longitudinal ratio is 1: 10, and voidage is low, and pore-size distribution is wider, not only poor performance, and intensity is low, has influenced being extensive use of of entire cell.
Summary of the invention
The purpose of this utility model is in order to overcome the shortcoming of prior art, a kind of size shape rule of barrier film via to be provided, respectively to intensity homogeneous polymer lithium ion battery separator.
The technical scheme of the utility model polymer lithium cell diaphragm is: via is arranged in the barrier film, it is characterized in that via on the polymer lithium cell diaphragm face is the via of sub-circular of evenly distributing.
Polymer lithium cell diaphragm of the present utility model, the pass sub-circular of via and even on the face, the advantage of sub-circular via is: one, permeability is good, and air permeability Gurley value is less than 40S; Two: the mechanical strength height, mechanical property is good, and lear energy is strong, is difficult for tearing in battery winding, can avoid the micro-short circuit phenomenon of inside battery, is convenient to the assembling of battery simultaneously.
Description of drawings
Fig. 1 is the structural representation of the utility model polymer lithium cell diaphragm.
Embodiment
The utility model relates to polymer lithium cell diaphragm, make battery diaphragm by polyolefine material for the base-material drawn, via is arranged in the barrier film, its major technology is characterised in that the via on polymer lithium cell diaphragm 1 face is the via 2 of sub-circular of evenly distributing, as shown in Figure 1.Because when producing, in polyolefine material, add 1%-5% nanometer SiO
2Powder, unidirectional stretching is made under 0.5-6 rice/minute speed, and the via 2 of sub-circular not only is evenly distributed on the face, and pass is also even, and permeability is good, and electric conductivity is good.This via is good in the mechanical property of all directions, and hot strength can be difficult for tearing in battery winding more than 120Mpa, thereby can avoid the short circuit that therefore causes, the security performance height, and cycle performance is good.Polyolefine material belongs to prior art, as polypropylene, polyethylene etc., 1%～5% nanometer SiO of adding
2Powder fully mixes with polyolefine material as filler, is distributed in the barrier film SiO
2Adding the space between the fiber in the barrier film is filled, the aperture improves, porosity increases, and does not change film strength, improves the performance of barrier film.
Below be the parameter index of this battery diaphragm:
| Project | Unit | Numerical value | Scope |
| Thickness | μm | 28 | 20-35 |
| Quality | g/m 2 | 15 | 12-18 |
| Voidage | ％ | 45 | 36-50 |
| Air permeability | L/(s·m 2) | 475 | 300-650 |
Claims (1)
1, polymer lithium cell diaphragm has via in the barrier film, it is characterized in that via on polymer lithium cell diaphragm (1) face is the via (2) of sub-circular of evenly distributing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201025261U CN2932631Y (en) | 2006-04-06 | 2006-04-06 | Polymer lithium ion battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201025261U CN2932631Y (en) | 2006-04-06 | 2006-04-06 | Polymer lithium ion battery diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2932631Y true CN2932631Y (en) | 2007-08-08 |
Family
ID=38349124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201025261U Expired - Fee Related CN2932631Y (en) | 2006-04-06 | 2006-04-06 | Polymer lithium ion battery diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2932631Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163704A (en) * | 2011-03-24 | 2011-08-24 | 中山国安火炬科技发展有限公司 | Lithium battery diaphragm and production method thereof |
| CN104362276A (en) * | 2014-10-27 | 2015-02-18 | 中国乐凯集团有限公司 | Polyethylene microporous membrane, preparation method and lithium ion battery |
-
2006
- 2006-04-06 CN CNU2006201025261U patent/CN2932631Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163704A (en) * | 2011-03-24 | 2011-08-24 | 中山国安火炬科技发展有限公司 | Lithium battery diaphragm and production method thereof |
| CN102163704B (en) * | 2011-03-24 | 2013-08-28 | 中山国安火炬科技发展有限公司 | Lithium battery diaphragm and production method thereof |
| CN104362276A (en) * | 2014-10-27 | 2015-02-18 | 中国乐凯集团有限公司 | Polyethylene microporous membrane, preparation method and lithium ion battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |