Preparation method of high-strength aluminum foil used for lithium ion battery

A lithium-ion battery, high-strength technology, applied in the direction of metal rolling, etc., can solve the problems that have not been reported, and achieve the effect of increasing the standing time, low and low temperature intermediate annealing temperature, and reducing power consumption

Active Publication Date: 2017-08-29
LUOYANG LONGDING ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] In summary, the research and development process of aluminum foil for lithium-ion batteries is almost at a standstill, and no relevant reports have been seen.

Method used

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  • Preparation method of high-strength aluminum foil used for lithium ion battery
  • Preparation method of high-strength aluminum foil used for lithium ion battery
  • Preparation method of high-strength aluminum foil used for lithium ion battery

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Embodiment Construction

[0042] The present invention is a method for preparing high-strength aluminum foil for lithium ion batteries. The present invention firstly melts electrolytic aluminum liquid and aluminum ingots into aluminum melt and directly casts them into 6.95mm thick cast-rolled coils, and then passes the cold rolling of the present invention. , The reasonable setting of technical parameters such as low-temperature intermediate annealing and foil rolling, so as to realize the direct preparation of cast-rolled coils from aluminum melt, greatly shortening the process flow and reducing the power consumption of the annealing furnace.

[0043] The preparation method of the present invention firstly melts electrolytic aluminum liquid and aluminum ingots into aluminum melt and directly casts them into 6.95mm thick cast-rolled coils, and then undergoes cold rolling→longitudinal shearing→low-temperature intermediate annealing→foil rolling→finished product slitting →Check the packaging process to prepa...

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Abstract

The invention relates to a preparation method of a high-strength aluminum foil used for a lithium ion battery. The preparation method comprises the following steps: firstly smelting electrolytic aluminum liquid and an aluminum ingot into an aluminum melt, directly casting and rolling to obtain a cast-rolling roll with the thickness of 6.95mm, and then carrying out cold rolling, longitudinal edge shearing, low temperature intermediate annealing, foil rolling, finished product slitting, inspection and packaging, thereby obtaining the high-strength aluminum foil used for the lithium ion battery. The aluminum melt is directly prepared into the cast-rolling roll, so that a technological process is greatly shortened, the low temperature intermediate annealing reduces power consumption of an annealing furnace, and the high-strength aluminum foil used for the lithium ion battery has the tensile strength higher than or equal to 175MPa and the surface wettability tension higher than or equal to 32 dynes.

Description

Technical field [0001] The invention belongs to the technical field of aluminum foil processing, in particular to a method for preparing high-strength aluminum foil for lithium ion batteries. Background technique [0002] Generally speaking, the aluminum or aluminum alloy strip formed by rolling the aluminum strip with a thickness of less than or equal to 0.2mm is called aluminum foil. Aluminum foil is widely used in various fields of the national economy, such as packaging, electrical appliances, radiators, and construction due to its light weight, good airtightness, good covering properties, and environmental protection. [0003] Aluminum foil for lithium ion batteries is currently used mostly in alloys such as 1060 and 1070. The commonly used thickness is 12-25μm and delivered in H18 state. Take 1070 alloy to prepare aluminum foil for lithium ion batteries as an example. The conventional process is: melting→casting Rolling→cold rolling→longitudinal cutting edge→high temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/04B21B1/40
CPCB21B1/40C22C1/026C22C21/00C22F1/04
Inventor 韩成艺张安乐程远鹏
Owner LUOYANG LONGDING ALUMINUM
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