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Processing method for power battery aluminum-plastic film aluminum foil

A power battery and processing method technology, applied in metal rolling and other directions, can solve the problems of aluminum foil ductility, surface compactness and internal stress, etc., to control thickness uniformity and surface compactness, and improve elongation And the effect of surface compactness and ductility is good

Active Publication Date: 2020-12-25
GUANGDONG ANDELI NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the existing solutions can simultaneously solve the problems of aluminum foil ductility, surface compactness and internal stress

Method used

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  • Processing method for power battery aluminum-plastic film aluminum foil
  • Processing method for power battery aluminum-plastic film aluminum foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An aluminum-plastic film aluminum foil for power batteries:

[0031] (1) put the 8079 aluminum alloy plate and metal additives into the melting furnace for melting at 650°C, then add metal zirconium powder into the melting furnace, and carry out secondary melting at 720°C to obtain an aluminum melt;

[0032] The mass ratio of aluminum alloy plate to Fe, Cu, Mn, Mg, Zn, Cr, Ti is 100:1.2:0.05:0.08:0.02:0.03:0.08:0.08;

[0033] The mass ratio of metal zirconium powder to aluminum alloy plate is 0.1:100;

[0034] (2) Add silicon oxide to the aluminum melt, stir it evenly, and cast and roll it through a casting rolling machine, and cast and roll the melt into a cast rolling coil with a thickness of 6mm through a casting roll, with a casting temperature of 650°C and a casting speed of 700mm / min;

[0035] (3) A multi-roll reversible rolling mill is used to carry out reciprocating multi-pass cold rolling 3 times to a thickness of 0.5mm for cast-rolled coils, and higher alcoho...

Embodiment 2

[0039] An aluminum-plastic film aluminum foil for power batteries:

[0040] (1) put the 8021 aluminum alloy plate and metal additives into the melting furnace for melting at 720°C, then add metal zirconium powder into the melting furnace, and carry out secondary melting at 650°C to obtain an aluminum melt;

[0041] The mass ratio of aluminum alloy plate to Fe, Cu, Mn, Mg, Zn, Cr, Ti is 100:1.5:0.1:0.03:0.01:0.08:0.03:0.03;

[0042] The mass ratio of metal zirconium powder to aluminum alloy plate is 0.15:100;

[0043] (2) Add silicon oxide to the aluminum melt, stir evenly, cast and roll through a casting and rolling machine, and cast and roll the melt into a cast and rolled coil with a thickness of 4mm through a casting and rolling roll, with a casting and rolling temperature of 620°C and a casting and rolling speed of 800mm / min;

[0044] (3) Using a multi-roll reversible rolling mill to carry out reciprocating multi-pass cold rolling 5 times to a thickness of 0.3mm for the c...

Embodiment 3

[0048] An aluminum-plastic film aluminum foil for power batteries:

[0049] (1) put the 8021 aluminum alloy plate and the metal additive material into the melting furnace for melting at 700°C, then add metal zirconium powder into the melting furnace, and carry out secondary melting at 700°C to obtain an aluminum melt;

[0050] The mass ratio of aluminum alloy plate to Fe, Cu, Mn, Mg, Zn, Cr, Ti is 100:1.3:0.08:0.05:0.01:0.05:0.04:0.04;

[0051] The mass ratio of metal zirconium powder to aluminum alloy plate is 0.12:100;

[0052] (2) Add silicon oxide to the aluminum melt, stir it evenly, and cast and roll it through a casting rolling machine, and cast and roll the melt into a cast rolling coil with a thickness of 5mm through a casting roll, with a casting temperature of 630°C and a casting speed of 750mm / min;

[0053] (3) A multi-roll reversible rolling mill is used to carry out reciprocating multi-pass cold rolling 4 times to a thickness of 0.4mm for the cast-rolled coil, a...

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Abstract

The invention discloses a processing method for a power battery aluminum-plastic film aluminum foil. The method comprises the steps that an aluminum alloy plate and a metal additive material are placed into a smelting furnace for smelting, metal zirconium powder is added, and secondary smelting is carried out to obtain an aluminum melt; silicon oxide is added into the aluminum melt, cast rolling is carried out by using a cast rolling machine after uniform stirring, and a cast rolling roller is used for performing cast rolling on the melt to form a cast-rolled coil; reciprocating multi-pass cold rolling is performed on the cast-rolled coil by adopting a multi-roll reversible rolling mill; intermediate annealing is performed on a cold-rolled coil; and after annealing, and multi-pass finish rolling is carried out to prepare an aluminum foil coil. According to the method, the aluminum foil is prepared by adjusting the proportional relation of all elements in an alloy and through two timesof smelting, cast rolling, cold rolling, annealing and finish rolling processes, the prepared aluminum foil is good in ductility, meanwhile, the thickness uniformity and the surface compactness of thealuminum foil can be effectively controlled, meanwhile, a cast rolling method is adopted for processing, complex technological processes such as ingot casting and hot rolling compounding in a conventional production process can be omitted, and energy conservation and consumption reduction are achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum foil processing, in particular to a processing method for an aluminum-plastic film aluminum foil of a power battery. Background technique [0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and uses a non-aqueous electrolyte solution. It has the advantages of high energy, long service life, light weight, strong temperature adaptability, and environmental protection, and is widely used in electronic fields such as mobile phones, notebook computers, and electric vehicles. [0003] Aluminum-plastic film aluminum foil is an important material for packaging soft-pack lithium batteries, and plays a vital role in the quality of soft-pack batteries. Due to the characteristics of lithium batteries, the working environment of aluminum foil for lithium-ion batteries is relatively harsh. During use, the aluminum foil with the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22F1/04C22C1/10B22D11/06B21B1/46B21B1/40B21B3/00
CPCC22C21/00C22C32/0036C22F1/04C22C1/1036B22D11/06B21B1/463B21B1/40B21B3/00B21B2003/001Y02E60/10
Inventor 陈汉城王桂彬熊泽民
Owner GUANGDONG ANDELI NEW MATERIALS CO LTD
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