Aluminum foil for high performance 1100 alloy lithium ion battery and preparation method thereof

A lithium-ion battery, high-performance technology, applied in the field of aluminum alloy materials, can solve the problems of reducing the rate of broken belts in downstream processes, reducing battery production efficiency, and insufficient strength of aluminum foil substrates, etc., to achieve optimized pass allocation, efficiency improvement, and reliability. Strong processing effect

Inactive Publication Date: 2020-03-06
山东德利铝业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventional production of aluminum foil is usually difficult to stabilize the tensile strength of more than 190MPa. It is coated and rolled in the downstream battery production process. However, in this process, the insufficient strength of the foil often leads to tape breakage, which reduces the battery production efficiency. , leading to an increase in waste products in the downstream process and an increase in the failure rate. In order to solve the above problems, the patent of the present invention mainly solves the problem of broken tape in the downstream process caused by insufficient strength of the aluminum foil base material. Its tensile strength can be increased from the original 190MPa to more than 250MPa. Greatly reduce the rate of broken belts in downstream processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] High-performance 1100 alloy aluminum foil for lithium-ion batteries is made of the following raw materials in mass percentage: Fe: 0.4%; Si: 0.1%; Cu: 0.11%; Mn: 0.05%; Mg: 0.05%; Zn: 0.02% ; Ti: 0.01%; Al: 99.00%, and the rest are unavoidable impurities.

[0027] The above-mentioned high-performance 1100 alloy lithium-ion battery preparation method includes the steps of smelting, casting, cold rolling and foil rolling, wherein the distribution of cold rolling passes is as follows: the first pass is pressed from 7.0 mm to 5.0 mm, and the second pass is pressed from 7.0 mm to 5.0 mm. The second pass is pressed from 5.0mm to 3.8mm, the third pass is pressed from 3.8mm to 1.8mm, the fourth pass is pressed from 1.8mm to 1.1mm, the fifth pass is pressed from 1.1mm to 0.6mm, the sixth pass The first time is pressed from 0.6mm to 0.35mm, and the seventh time is pressed from 0.35mm to 0.22mm. In the second pass, heat treatment is carried out. The furnace gas temperature is cont...

Embodiment 2

[0038] High-performance 1100 alloy aluminum foil for lithium-ion batteries is made of the following raw materials in mass percentage: Fe: 0.6%; Si: 0.2%; Cu: 0.17%; Mn: 0.04%; Mg: 0.04%; Zn: 0.01% ; Ti: 0.03%; Al: 99.10%, and the rest are unavoidable impurities.

[0039]The above-mentioned high-performance 1100 alloy lithium-ion battery preparation method includes the steps of smelting, casting, cold rolling and foil rolling, wherein the distribution of cold rolling passes is as follows: the first pass is pressed from 7.0 mm to 5.0 mm, and the second pass is pressed from 7.0 mm to 5.0 mm. The second pass is pressed from 5.0mm to 3.8mm, the third pass is pressed from 3.8mm to 1.8mm, the fourth pass is pressed from 1.8mm to 1.1mm, the fifth pass is pressed from 1.1mm to 0.6mm, the sixth pass The first time is pressed from 0.6mm to 0.35mm, the seventh time is pressed from 0.35mm to 0.22mm, heat treatment is carried out in the second pass, the temperature of the furnace gas is con...

Embodiment 3

[0050] High-performance 1100 alloy aluminum foil for lithium-ion batteries is made of the following raw materials in mass percentage: Fe: 0.52%; Si: 0.12%; Cu: 0.16%; Mn: 0.05%; Mg: 0.05%; Zn: 0.02% ; Ti: 0.015%; Al: 99.00%, and the rest are unavoidable impurities.

[0051] The above-mentioned high-performance 1100 alloy lithium-ion battery preparation method includes the steps of smelting, casting, cold rolling and foil rolling, wherein the distribution of cold rolling passes is as follows: the first pass is pressed from 7.0 mm to 5.0 mm, and the second pass is pressed from 7.0 mm to 5.0 mm. The second pass is pressed from 5.0mm to 3.8mm, the third pass is pressed from 3.8mm to 1.8mm, the fourth pass is pressed from 1.8mm to 1.1mm, the fifth pass is pressed from 1.1mm to 0.6mm, the sixth pass The first time is pressed from 0.6mm to 0.35mm, and the seventh pass is pressed from 0.35mm to 0.22mm. In the second pass, heat treatment is carried out. The temperature of the furnace g...

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Abstract

The invention discloses an aluminum foil for a high performance 1100 alloy lithium ion battery and a preparation method thereof. The aluminum foil is prepared from the following raw materials in percent by mass: 0.4-0.6% of Fe, 0.1-0.2% of Si, 0.11-0.17% of Cu, less than or equal to 0.05% of Mn, less than or equal to 0.05% of Mg, less than or equal to 0.02% of Zn, 0.01-0.03% of Ti, greater than orequal to 99.00% of Al and the balance inevitable impurities. The components and a thermal treatment process of the alloy are adjusted, so that the mechanical property (over 260 MPa) of a product is improved greatly. The tensile strength and the ductility reach the top level. The rate of strip breakage in a downstream step (coating and roll extruding) of the alloy is reduced greatly, so that purposes of improving the efficiency and stabilizing the quality are achieved. By adopting the novel thermal treatment process, the inner structure of an aluminum alloy material is improved, and the mechanical property is optimized, so that the machinability of the aluminum foil in a follow-up production process is better. Pass distribution is optimized, so that the mechanical property of the materialis improved effectively. The shape of the panel is optimized, so that the production efficiency of the product is improved.

Description

technical field [0001] The invention relates to an aluminum foil for a high-performance 1100 alloy lithium ion battery and a preparation method thereof. The invention belongs to the technical field of aluminum alloy materials. Background technique [0002] Conventional production of aluminum foil is usually difficult to stabilize the tensile strength of more than 190MPa. It is coated and rolled in the downstream battery production process. However, in this process, the insufficient strength of the foil often leads to tape breakage, which reduces the battery production efficiency. , leading to an increase in waste products in the downstream process and an increase in the failure rate. In order to solve the above problems, the patent of the present invention mainly solves the problem of broken tape in the downstream process caused by insufficient strength of the aluminum foil base material. Its tensile strength can be increased from the original 190MPa to more than 250MPa. Gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C21D9/46C22C21/00C22C1/02
CPCC21D9/46C22C1/026C22C21/00C22F1/04
Inventor 高森李贻成郭峰阴建香史久华刘欢欢王猛
Owner 山东德利铝业科技有限公司
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