CN111740044A - Composite foil and production process thereof - Google Patents
Composite foil and production process thereof Download PDFInfo
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- CN111740044A CN111740044A CN202010658765.XA CN202010658765A CN111740044A CN 111740044 A CN111740044 A CN 111740044A CN 202010658765 A CN202010658765 A CN 202010658765A CN 111740044 A CN111740044 A CN 111740044A
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- Prior art keywords
- layer
- composite foil
- composite
- foil layer
- base material
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- 239000011888 foil Substances 0.000 title claims abstract description 74
- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 22
- 239000002585 base Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000001755 magnetron sputter deposition Methods 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000009713 electroplating Methods 0.000 claims abstract description 8
- 230000008719 thickening Effects 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 4
- 239000003513 alkali Substances 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 239000011889 copper foil Substances 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 230000037452 priming Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 5
- 239000010949 copper Substances 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a composite foil and a production process thereof, wherein the composite foil comprises a composite foil layer and a substrate layer, the composite foil layer comprises an upper composite foil layer and a lower composite foil layer, and the upper composite foil layer and the lower composite foil layer are respectively connected to two surfaces of the substrate layer; the production process comprises the steps of uncoiling and drying the base material, manufacturing a base layer on the base material by using a magnetron sputtering process, manufacturing a thickening layer on the base layer by using an alkali liquor electroplating process, forming a secondary base layer on the thickening layer by using a secondary magnetron sputtering process, manufacturing a metal layer on the secondary base layer by using an acid liquor electroplating process, and slitting and packaging the composite foil after stress release. The invention relates to the technical field of batteries, and particularly provides a composite foil and a production process thereof, wherein the composite foil can reduce the thickness of copper/aluminum foil, reduce the ratio of copper/aluminum in a base material, delay or prevent a battery from igniting when a battery pack is short-circuited, and prolong the cycle life of the battery.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a composite foil and a production process thereof.
Background
With the development of lithium battery technology, high energy density, light weight and flexibility of lithium ion batteries are pursued by people, and the reduction of copper can realize the light weight of the lithium ion batteries, improve the energy density and reduce the cost, so that a new reduction technology needs to be developed.
Disclosure of Invention
In order to solve the existing problems, the invention provides the composite foil and the production process thereof, wherein the thickness of the copper/aluminum foil can be reduced, the ratio of the copper/aluminum in a base material is reduced, the battery is delayed or prevented from being ignited when a short circuit occurs in a battery pack, and the cycle life of the battery is prolonged.
The technical scheme adopted by the invention is as follows: the composite foil comprises an upper composite foil layer and a lower composite foil layer, the upper composite foil layer and the lower composite foil layer are respectively connected to two sides of the base material layer, the upper composite foil layer and the lower composite foil layer are respectively independent bodies, and current on two sides of the base material layer can be effectively and equally divided during charging and discharging, so that reaction substances on two sides of the upper composite foil layer and the lower composite foil layer are uniformly and synchronously charged and discharged, and the cycle life of a battery is greatly prolonged.
Further, the composite foil layer is a composite copper foil layer or a composite aluminum foil layer.
Further, the substrate layer includes but is not limited to PP, PET plastic film.
A process for producing a composite foil, comprising the steps of:
(1) preparing a base material with the thickness of 2-4 microns, uncoiling and drying the base material, and filling gas while drying to form a rough surface on the surface of the base material;
(2) manufacturing a priming layer on a substrate by utilizing a magnetron sputtering process;
(3) manufacturing a thickening layer on the bottom layer by using an alkali liquor electroplating process;
(4) the secondary magnetron sputtering process is carried out on the thickening layer to form a secondary bottom layer, so that the whole ductility can be increased;
(5) manufacturing a metal layer on the secondary bottom layer by using an acid electroplating process to form a composite foil;
(6) and performing stress release treatment on the composite foil at the temperature of 60-80 ℃, and then slitting and packaging.
The invention with the structure has the following beneficial effects: this scheme composite foil and production technology, the substrate has strengthened the cohesive force on surface through strong oxygen processing, mode through magnetron sputtering deposits the metal level on non-metallic film, make through sedimentary non-metallic film show the metallic characteristic, reach the electrically conductive effect in surface, take electrically conductive non-metallic film through the compound foil layer of electrochemistry principle bodiness, finally reach the thickness that needs, go up composite foil layer and lower composite foil layer and be independent individuality respectively, can effectually equally divide the electric current on substrate layer two sides when charging and discharging, make the even synchronous charge-discharge that carries out of reaction material of going up composite foil layer and lower composite foil layer both sides, very big improvement the cycle life of battery.
Drawings
Fig. 1 is a schematic view of the overall structure of a composite foil and a process for producing the same according to the present invention.
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
The composite foil layer comprises 1 composite foil layer, 2 base material layer, 3 upper composite foil layer, 4 lower composite foil layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the composite foil of the present invention includes a composite foil layer 1 and a substrate layer 2, wherein the composite foil layer 1 includes an upper composite foil layer 3 and a lower composite foil layer 4, and the upper composite foil layer 3 and the lower composite foil layer 4 are respectively connected to two sides of the substrate layer 2.
Wherein the composite foil layer 1 is a composite copper foil layer or a composite aluminum foil layer; the thickness of the composite copper foil layer is 1 mu m; the substrate layer 2 includes but is not limited to PP, PET plastic film.
A process for producing a composite foil, comprising the steps of:
(1) preparing a base material with the thickness of 2-4 microns, uncoiling and drying the base material, and filling gas while drying to form a rough surface on the surface of the base material;
(2) manufacturing a priming layer on a substrate by utilizing a magnetron sputtering process;
(3) manufacturing a thickening layer on the bottom layer by using an alkali liquor electroplating process;
(4) the secondary magnetron sputtering process is carried out on the thickening layer to form a secondary bottom layer, so that the whole ductility can be increased;
(5) manufacturing a metal layer on the secondary bottom layer by using an acid electroplating process to form a composite foil;
(6) and performing stress release treatment on the composite foil at the temperature of 60-80 ℃, and then slitting and packaging.
The substrate has strengthened the cohesive force on surface through strong oxygen processing, mode through magnetron sputtering deposits the metal level on non-metallic film, make through the non-metallic film of deposit show the metallic characteristic, reach the effect that the surface can electrically conduct, take electrically conductive non-metallic film through the compound foil layer of electrochemistry principle bodiness, finally reach the thickness that needs, go up compound foil layer and lower compound foil layer and be independent individuality respectively, can effectually equally divide the electric current of substrate layer two sides when charging and discharging, make the even synchronous charge-discharge that carries out of reaction material of going up compound foil layer and lower compound foil layer both sides, very big improvement the cycle life of battery.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (5)
1. A composite foil, characterized in that: the composite foil layer comprises an upper composite foil layer and a lower composite foil layer, and the upper composite foil layer and the lower composite foil layer are respectively connected to two sides of the substrate layer.
2. A composite foil according to claim 1, characterised in that: the composite foil layer is a composite copper foil layer.
3. A composite foil according to claim 1, characterised in that: the composite foil layer is a composite aluminum foil layer.
4. A composite foil according to claim 1, characterised in that: the substrate layer includes but is not limited to PP, PET plastic film.
5. A process for producing a composite foil, comprising the steps of:
(1) preparing a base material, uncoiling and drying the base material, and filling gas while drying to form a matte surface on the surface of the base material;
(2) manufacturing a priming layer on a substrate by utilizing a magnetron sputtering process;
(3) manufacturing a thickening layer on the bottom layer by using an alkali liquor electroplating process;
(4) performing a secondary magnetron sputtering process on the thickening layer to form a secondary bottom layer, so that the overall ductility is increased;
(5) manufacturing a metal layer on the secondary bottom layer by using an acid electroplating process to form a composite foil;
(6) and performing stress release treatment on the composite foil at the temperature of 60-80 ℃, and then slitting and packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658765.XA CN111740044A (en) | 2020-07-09 | 2020-07-09 | Composite foil and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658765.XA CN111740044A (en) | 2020-07-09 | 2020-07-09 | Composite foil and production process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111740044A true CN111740044A (en) | 2020-10-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010658765.XA Pending CN111740044A (en) | 2020-07-09 | 2020-07-09 | Composite foil and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111740044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188543A (en) * | 2021-11-15 | 2022-03-15 | 深圳市宝明科技股份有限公司 | Composite conductive copper foil and preparation method thereof |
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| CN106981665A (en) * | 2017-04-14 | 2017-07-25 | 深圳鑫智美科技有限公司 | A kind of negative current collector, its preparation method and its application |
| CN107779833A (en) * | 2017-11-07 | 2018-03-09 | 重庆大学 | A kind of composite film coating technique |
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| CN109097749A (en) * | 2017-12-15 | 2018-12-28 | 深圳科诺桥科技股份有限公司 | The preparation method of flexibility coat copper plate |
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| CN111180736A (en) * | 2019-05-31 | 2020-05-19 | 宁德时代新能源科技股份有限公司 | Positive current collector, positive pole piece and electrochemical device |
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2020
- 2020-07-09 CN CN202010658765.XA patent/CN111740044A/en active Pending
Patent Citations (11)
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| US20090291319A1 (en) * | 2006-05-19 | 2009-11-26 | Mitsui Mining & Smelting Co., Ltd. | Copper foil with carrier sheet, method for manufacturing copper foil with carrier sheet, surface-treated copper foil with carrier sheet and copper-clad laminate using the surface-treated copper foil with carrier sheet |
| CN106981665A (en) * | 2017-04-14 | 2017-07-25 | 深圳鑫智美科技有限公司 | A kind of negative current collector, its preparation method and its application |
| CN207097948U (en) * | 2017-04-14 | 2018-03-13 | 安徽金美新材料科技有限公司 | A kind of sandwich construction collector |
| CN107779833A (en) * | 2017-11-07 | 2018-03-09 | 重庆大学 | A kind of composite film coating technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114188543A (en) * | 2021-11-15 | 2022-03-15 | 深圳市宝明科技股份有限公司 | Composite conductive copper foil and preparation method thereof |
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Application publication date: 20201002 |