CN207250624U - A kind of lithium ion battery double face binding membrane and lithium ion battery - Google Patents
A kind of lithium ion battery double face binding membrane and lithium ion battery Download PDFInfo
- Publication number
- CN207250624U CN207250624U CN201720563948.7U CN201720563948U CN207250624U CN 207250624 U CN207250624 U CN 207250624U CN 201720563948 U CN201720563948 U CN 201720563948U CN 207250624 U CN207250624 U CN 207250624U
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- Prior art keywords
- lithium ion
- ion battery
- membrane
- coated
- basement membrane
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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 provides a kind of lithium ion battery double-sided adhesive membrane and lithium ion battery, the lithium ion battery includes basement membrane with double face binding membrane, the one side of the basement membrane is coated with the gluing oxidant layer of water system PVDF, and the another side of the basement membrane is coated with acrylate resin layer.Using the technical solution of the utility model, the short circuit ratio of core is reduced, improves product qualification rate；And battery core hardness is obviously improved, positive flatulence ratio greatly reduces；Big multiplying power discharging property, the cycle performance of lithium ion battery are improved, service life is longer, relatively reliable.
Description
Technical field
The utility model belongs to field of lithium ion battery, more particularly to a kind of lithium ion battery double face binding membrane and lithium
Ion battery.
Background technology
The membrane with adhesive effect mainly has two categories below currently on the market：
1st, solvent is water-based PVDF, and the one side or two-sided of basement membrane is coated uniformly on by way of intaglio printing；
2nd, solvent is the PVDF of oil system, and the two-sided of basement membrane is coated in using dip coating manner；
Above-mentioned membrane there are problems that.The first, it is poor to apply water-based PVDF membranes and cathode adhesive effect, and cathode holds
Easy dry linting, be easy to cause short circuit, flatulence, and the cycle performance of lithium ion battery being fabricated to is bad, big multiplying power discharging property compared with
Difference.Second, the membrane of oiling system PVDF is two-sided due to that using dip coating manner, can only coat, and electrostatic is big, is made in battery
During be easily absorbing dust, on the one hand cause battery to have security risk, core is easily short-circuit, and the cycle performance of battery
It is bad, on the other hand reduce qualification rate, increase manufacture cost.
Utility model content
For above technical problem, the utility model discloses a kind of lithium ion battery double face binding membrane and lithium ion
Battery, reduces core short circuit ratio, improves product qualification rate, improves big multiplying power discharging property, the cyclicity of lithium ion battery
Energy.
In this regard, the technical solution adopted in the utility model is：
A kind of lithium ion battery double face binding membrane, it includes basement membrane, and the one side of the basement membrane is coated with water system PVDF
Gluing oxidant layer can be with any material coating including binding agent generation glue in the cathode batch mixing even material of reaction, the basement membrane
Another side be coated with acrylate resin layer.Using this technical solution, during with having adhesive effect during positive and negative electrodes in same, significantly
The battery core hardness of raising, increases CSAT；Reduce core short circuit ratio at the same time, improve product qualification rate, improve lithium from
Big multiplying power discharging property, the cycle performance of sub- battery.
As further improvement of the utility model, the thickness of the gluing oxidant layer of water system PVDF is 0.5 ~ 7 μm.
Further, the thickness of the gluing oxidant layer of water system PVDF is 1 ~ 3 μm.
As further improvement of the utility model, the thickness of the acrylate resin layer is 0.5 ~ 7 μm.
Further, the thickness of the acrylate resin layer is 1 ~ 3 μm.
As further improvement of the utility model, the material of the basement membrane is PP or PE.
As further improvement of the utility model, the material of the gluing oxidant layer of water system PVDF is PVDF and Al2O3It is mixed
Compound.Using this technical solution, add ceramics in the water-based PVDF adhesive of the one side of basement membrane and carry out mixed painting, reduce electrostatic, side
Just process makes, while reduces the absorption of dust, advantageously reduces core short circuit ratio, improves product qualification rate.
Preferably, the PVDF and Al2O3Mass ratio be (80:20)~(40:60).
The invention also discloses a kind of lithium ion battery, it includes cathode, anode and as above described in any one
Membrane, the cathode is opposite with one side of the membrane coated with the gluing oxidant layer of water system PVDF, and the anode is coated with poly- third with membrane
The one side of olefin(e) acid ester gum adhesive layer is opposite.
Compared with prior art, the beneficial effects of the utility model are：
Using the technical solution of the utility model, battery core hardness is obviously improved, and the two sides of membrane has viscous at the same time with positive and negative electrode
When connecing effect, battery core hardness can greatly improve, and flatulence ratio greatly reduces, and increase CSAT.Meanwhile also improve lithium from
Big multiplying power discharging property, the cycle performance of sub- battery, particularly after the circulation of more than 300 times, capacity attenuation is small, still ties up
Very high battery capacity is held, service life is longer, relatively reliable.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of embodiment of the utility model.
Fig. 2 is double face binding membrane and cathode and the anode structural representation when assembled of a kind of embodiment of the utility model
Figure.
Fig. 3 is a kind of knot of the double face binding membrane of embodiment of the utility model with being coiled into core after cathode and anode assembling
Structure schematic diagram.
Embodiment
The preferably embodiment of the utility model is described in further detail below.
Embodiment 1
As shown in Figure 1, a kind of lithium ion battery double face binding membrane, it includes basement membrane 1, and the basement membrane 1 simultaneously coats
There is the gluing oxidant layer 2 of water system PVDF, form the A faces of membrane, the another side of the basement membrane 1 is coated with acrylate resin layer 3,
Form the B faces of membrane.The thickness of the gluing oxidant layer 2 of water system PVDF is 0.5 ~ 2 μm, the acrylate resin layer 3
Thickness is 0.5 ~ 2 μm.
Wherein, the material of the gluing oxidant layer of water system PVDF is PVDF and Al2O3Mixture.The polyacrylic acid ester gum
For the active component that the adhesive that adhesive layer uses includes for 100% polyacrylate, solvent is water.The material of the basement membrane is PE.
Embodiment 2
Lithium ion battery, such as Fig. 2 are assembled into using the membrane of embodiment 1 and lithium cobaltate cathode, the Carbon anode of identical component
Shown in Fig. 3, the A faces 20 of 10 and one membrane of cathode are opposite, and the anode 30 is opposite with the B faces 40 of another membrane, then
Hot pressing and cold pressing are carried out respectively.Then it is one layer of membrane, one layer of cathode, 10, one layers of membrane, one layer of anode according to the order of such as Fig. 2
30 order stacks, wherein, the A faces 20 of membrane correspond to cathode 10, and the B faces 40 of membrane correspond to anode 30, are then wound into battery core
Rectangular lithium ion battery is prepared into, as shown in Figure 3.Preferably, the material of the membrane is PE.
The lithium ion battery is tested for the property, the gluing oxidant layer of water system PVDF is coated with membrane, the single side being not coated by
Membrane, single side coat membrane of acrylic tackifier layer etc. and compare, and have more preferable hardness and resistance to bend(ing) energy, flatulence ratio
Greatly reduce, improve big multiplying power discharging property, the cycle performance of battery.
Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded
To belong to the scope of protection of the utility model.
Claims (5)
- A kind of 1. lithium ion battery double face binding membrane, it is characterised in that：It includes basement membrane, and the one side of the basement membrane is coated with The gluing oxidant layer of water system PVDF, the another side of the basement membrane are coated with acrylate resin layer；The water system PVDF adhesive The thickness of layer is 0.5 ~ 7 μm；The thickness of the acrylate resin layer is 0.5 ~ 7 μm.
- 2. lithium ion battery according to claim 1 double face binding membrane, it is characterised in that：The water system PVDF is gluing The thickness of oxidant layer is 1 ~ 3 μm；The thickness of the acrylate resin layer is 1 ~ 3 μm.
- 3. lithium ion battery according to claim 1 double face binding membrane, it is characterised in that：The material of the basement membrane is PP or PE.
- 4. lithium ion battery according to claim 1 double face binding membrane, it is characterised in that：The water system PVDF is gluing The material of oxidant layer is PVDF and Al2O3Mixture.
- A kind of 5. lithium ion battery, it is characterised in that：It includes cathode, anode and as described in claim 1 ~ 4 any one Membrane, the cathode is opposite with one side of the membrane coated with the gluing oxidant layer of water system PVDF, and the anode is coated with poly- third with membrane The one side of olefin(e) acid ester gum adhesive layer is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720563948.7U CN207250624U (en) | 2017-05-19 | 2017-05-19 | A kind of lithium ion battery double face binding membrane and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720563948.7U CN207250624U (en) | 2017-05-19 | 2017-05-19 | A kind of lithium ion battery double face binding membrane and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207250624U true CN207250624U (en) | 2018-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720563948.7U Expired - Fee Related CN207250624U (en) | 2017-05-19 | 2017-05-19 | A kind of lithium ion battery double face binding membrane and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207250624U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107275552A (en) * | 2017-05-19 | 2017-10-20 | 深圳瑞隆新能源科技有限公司 | A kind of lithium ion battery double-sided adhesive barrier film and lithium ion battery |
| CN109935761A (en) * | 2018-11-13 | 2019-06-25 | 万向一二三股份公司 | A kind of lithium ion battery composite pole piece and preparation method thereof |
-
2017
- 2017-05-19 CN CN201720563948.7U patent/CN207250624U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107275552A (en) * | 2017-05-19 | 2017-10-20 | 深圳瑞隆新能源科技有限公司 | A kind of lithium ion battery double-sided adhesive barrier film and lithium ion battery |
| CN109935761A (en) * | 2018-11-13 | 2019-06-25 | 万向一二三股份公司 | A kind of lithium ion battery composite pole piece and preparation method thereof |
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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: 20180417 Termination date: 20200519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |