CN213459794U - Current collector composite material for anti-needling lithium battery - Google Patents
Current collector composite material for anti-needling lithium battery Download PDFInfo
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- CN213459794U CN213459794U CN202022478901.5U CN202022478901U CN213459794U CN 213459794 U CN213459794 U CN 213459794U CN 202022478901 U CN202022478901 U CN 202022478901U CN 213459794 U CN213459794 U CN 213459794U
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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 relates to an anti acupuncture mass flow body combined material for lithium cell. The current collector composite material has a multilayer structure and comprises a film adhesive layer, wherein an aluminum foil layer and an anti-oxidation layer are sequentially compounded on the upper surface and the lower surface of the film adhesive layer. The utility model adopts the composite aluminum foil material to increase the toughness of the current collector after double-layer compounding, thereby obviously improving the needling strength; simultaneously, after the middle high-temperature-resistant insulating glue layer or the middle high-temperature-resistant film layer is compounded, after the single-side needling or the double-side needling of the battery is performed, the battery can still be kept from short circuit due to the insulating property of the middle layer, and therefore the safety of the battery is greatly improved.
Description
Technical Field
The utility model relates to a lithium cell field, in particular to anti acupuncture mass flow body combined material for lithium cell.
Background
The electrode material of the lithium ion battery comprises a positive electrode material and a negative electrode material, wherein the positive electrode material and the negative electrode material are composed of a tab material, a current collector material and an electrode material on a current collector, wherein the current collector refers to a matrix metal for attaching an active substance to a positive electrode or a negative electrode of the battery, the current collector mainly plays a role of leading current to the active substance during charging and leading current of the active substance to a load during discharging, and generally, the positive electrode is made of aluminum foil, and the negative electrode is made of copper foil.
The positive current collector of the traditional lithium ion battery adopts a mode of coating an aluminum layer to form the positive current collector, the thickness of the coated aluminum layer is generally in a nanometer level, a puncture phenomenon can occur under a needling test, a short circuit occurs in the battery, the battery can be possibly heated or failed, and how to realize the safety and the high efficiency of the lithium ion battery current collector is also an important factor for determining the electrode quality of the battery and the safety of the battery.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an anti acupuncture mass flow combined material for lithium cell, this combined material make up through two-sided aluminium foil, two-sided oxidation barrier, can improve the resistant acupuncture intensity of material, improve the security of electrode and battery.
The technical scheme of the utility model is that: a current collector composite material for a needling-resistant lithium battery. The current collector composite material has a multilayer structure and comprises a film adhesive layer, wherein an aluminum foil layer and an anti-oxidation layer are sequentially compounded on the upper surface and the lower surface of the film adhesive layer.
As a preferred scheme of the utility model, the thickness of the film adhesive layer is 1-10 μm, and the material is high temperature resistant insulating glue.
As an optimized proposal of the utility model, the organic glue in the high temperature resistant insulating glue is generally selected from one of organic silicon glue, phenolic resin glue, urea-formaldehyde resin glue, temperature resistant epoxy glue or polyimide glue.
As a preferred scheme of the utility model, the thickness of the aluminum foil layer is 2-16 μm, and the material is aluminum foil alloy.
As a preferred scheme of the utility model, the material of the anti-oxidation layer is non-metal SiC or Si3N4And Al2O3A combination of two or three of them is subjected to evaporation.
As a preferred scheme of the utility model, the thickness of the anti-oxidation layer is 200-1000 nm.
After the technical scheme is adopted, the beneficial effects of the utility model are that: firstly, the high-temperature-resistant insulating glue not only realizes strong adhesion between aluminum foils, but also realizes the heat generation process of the battery during operation, and the high-temperature-resistant insulating glue is unlikely to flow when the traditional resin reaches the vitrification temperature, so that the stability of the electrode is enhanced; and secondly, the needling resistance strength of the current collector can be improved through the compounding of the double-layer aluminum foils, and the battery electrode can be kept from short circuit under needling because the insulating glue layers are arranged between the aluminum foils, so that the safety of the electrode and the battery can be ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1, a first oxidation resistant layer; 2. a first aluminum foil layer; 3. a film adhesive layer; 4. a second aluminum foil layer; 5. second oxidation preventing layer
Detailed Description
The invention will be further elucidated with reference to the embodiments described hereinafter.
Examples
As shown in fig. 1, the utility model provides an anti acupuncture is mass flow body combined material for lithium cell, this mass flow body combined material it has multilayer structure, including membrane adhesive layer 3(adhesive abbreviation is AD) the surface has compound aluminium foil layer (AL) (2,4) and anti-oxidation coating (abbreviation AC) (1,5) in proper order about the membrane adhesive layer.
The composite material is sequentially provided with 1 first anti-oxidation layer (AC) from inside to outside; 2 is a first aluminium foil layer AL); 3 is a film adhesive layer; 4 is a second aluminium foil layer (AL); and 5 is a second oxidation preventing layer (AC).
The thickness of the film adhesive layer is 1-10 mu m, and the material is high-temperature-resistant insulating glue.
The organic glue in the high-temperature-resistant insulating glue is generally one of organic silicon glue, phenolic resin glue, urea-formaldehyde resin glue, temperature-resistant epoxy glue or polyimide glue.
The thickness of the aluminum foil layer is 2-16 mu m, and the material is aluminum foil alloy.
The material of the anti-oxidation layer is non-metal SiC or non-metal Si3N4And Al2O3A combination of two or three of them is subjected to evaporation.
The thickness of the anti-oxidation layer is 200-1000 nm.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a current collector composite material for anti-acupuncture lithium cell which characterized in that, this current collector composite material has multilayer structure, including membrane adhesive layer (3) first aluminium foil layer (2) and first anti oxidation coating (1) have been compounded in proper order to membrane adhesive layer (3) upper surface second aluminium foil layer (4) and second anti oxidation coating (5) have been compounded in proper order to membrane adhesive layer (3) lower surface.
2. The current collector composite material for a lithium battery with resistance to needle punching as claimed in claim 1, wherein the thickness of the film adhesive layer is 1-10 μm, and the material is a high temperature resistant insulating adhesive.
3. The current collector composite for lithium battery resistant to needle punching as claimed in claim 1, characterized in that said first layer of aluminium foil (2) and said second layer of aluminium foil (4) have a thickness comprised between 2 and 16 μm.
4. The current collector composite material for the lithium battery with the resistance to the needle punching as recited in claim 1, wherein the thickness of the first oxidation prevention layer (1) and the second oxidation prevention layer (5) is 200-1000 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022478901.5U CN213459794U (en) | 2020-10-30 | 2020-10-30 | Current collector composite material for anti-needling lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022478901.5U CN213459794U (en) | 2020-10-30 | 2020-10-30 | Current collector composite material for anti-needling lithium battery |
Publications (1)
| Publication Number | Publication Date |
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| CN213459794U true CN213459794U (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022478901.5U Active CN213459794U (en) | 2020-10-30 | 2020-10-30 | Current collector composite material for anti-needling lithium battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112201794A (en) * | 2020-10-30 | 2021-01-08 | 浙江锂盾新能源材料有限公司 | Current collector composite material for anti-needling lithium battery and manufacturing method thereof |
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2020
- 2020-10-30 CN CN202022478901.5U patent/CN213459794U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112201794A (en) * | 2020-10-30 | 2021-01-08 | 浙江锂盾新能源材料有限公司 | Current collector composite material for anti-needling lithium battery and manufacturing method thereof |
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