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A kind of preparation method of high strength aluminum foil 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, ensuring quality, and low and low temperature intermediate annealing temperature

Active Publication Date: 2018-08-31
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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  • A kind of preparation method of high strength aluminum foil for lithium ion battery
  • A kind of preparation method of high strength aluminum foil for lithium ion battery
  • A kind of preparation method of high strength aluminum foil for lithium ion battery

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Embodiment Construction

[0042]The present invention is a preparation method of high-strength aluminum foil for lithium-ion batteries. In the present invention, electrolytic aluminum liquid and aluminum ingots are first smelted into aluminum melt, which is directly cast-rolled into 6.95mm-thick cast-rolled rolls, and then passed through the cold rolling process of the present invention. 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] In the preparation method of the present invention, electrolytic aluminum liquid and aluminum ingots are first smelted into aluminum melt, which is directly cast and rolled into 6.95mm thick cast-rolled coils, and then cold-rolled→longitudinal shearing→low temperature intermediate annealing→foil rolling→finished product slitting →...

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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 preparation method of high-strength aluminum foil for lithium ion batteries. Background technique [0002] In general, aluminum strips with a thickness less than or equal to 0.2 mm formed after rolling aluminum or aluminum alloy coils are called aluminum foils. Aluminum foil is widely used in various fields of the national economy such as packaging, electrical appliances, radiators and construction because of its light weight, good airtightness, good covering performance, and environmental protection. [0003] Aluminum foil for lithium-ion batteries is currently used more alloys such as 1060 and 1070. The common thickness is 12-25 μm and delivered in H18 state. Taking 1070 alloy as an example to prepare aluminum foil for lithium-ion batteries, the conventional process is: melting→casting Rolling→cold rolling→longitudinal shearing→high temperature intermediate ...

Claims

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Application Information

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Patent Type & Authority Patents(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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