Aluminum foil for power battery and preparation process of aluminum foil

A technology of power battery and preparation process, which is applied in metal rolling and other directions, can solve the problems of low dyne value of aluminum foil and affect product quality, etc., and achieve the effect of large surface tension coefficient, reasonable proportion and beautiful surface

Inactive Publication Date: 2021-04-16
郑州金辉新能源电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an aluminum foil for a power battery and its preparation process to so...

Method used

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  • Aluminum foil for power battery and preparation process of aluminum foil

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Embodiment 1

[0039] An aluminum foil for a power battery, the percentage by weight of each raw material in the aluminum foil is as follows: Si 0.05%, Fe 0.2%, Cu 0.2%, Mn 0.05%, Mg 0.05%, Zn 0.05%, Ti 0.01%, and the balance is Al.

[0040] The preparation process of the aluminum foil for the power battery comprises the following steps:

[0041] Step (1) Melting and casting: Weigh and mix each raw material according to the weight percentage, first smelt to obtain a melt, and then cast and roll the melt to form a 7mm thick cast-rolled coil; the smelting process includes melting, standing, refining, slag removal and deslagging After degassing, the hydrogen content of the melt is controlled below 0.10ml / 100gAl;

[0042] Step (2) First cold rolling: Cool the cast-rolled coil obtained in step (1) to room temperature, and then undergo the first cold rolling treatment to obtain a cold-rolled billet; the uncoiling tension of cold rolling is 20N / mm 2 , take-up tension is 30N / mm 2 , the rolling spe...

Embodiment 2

[0048] An aluminum foil for a power battery, the weight percentage of each raw material in the aluminum foil is as follows: Si 0.2%, Fe 0.7%, Cu 0.2%, Mn 0.05%, Mg 0.05%, Zn 0.05%, Ti 0.06%, and the balance is Al.

[0049] The preparation process of the aluminum foil for the power battery comprises the following steps:

[0050] Step (1) Melting and casting: Weigh and mix each raw material according to the weight percentage, first smelt to obtain a melt, and then cast and roll the melt to form a 7mm thick cast-rolled coil; the smelting process includes melting, standing, refining, slag removal and deslagging After degassing, the hydrogen content of the melt is controlled below 0.10 ml / 100gAl;

[0051] Step (2) First cold rolling: Cool the cast-rolled coil obtained in step (1) to room temperature, and then undergo the first cold rolling treatment to obtain a cold-rolled billet; the uncoiling tension of cold rolling is 25N / mm 2 , take-up tension is 35N / mm 2 , the rolling speed ...

Embodiment 3

[0057] An aluminum foil for a power battery, the weight percentage of each raw material in the aluminum foil is as follows: Si 0.1%, Fe 0.3%, Cu 0.2%, Mn 0.05%, Mg 0.05%, Zn 0.05%, Ti 0.02%, and the balance is Al.

[0058] The preparation process of the aluminum foil for the power battery comprises the following steps:

[0059] Step (1) Melting and casting: Weigh and mix each raw material according to the weight percentage, first smelt to obtain a melt, and then cast and roll the melt to form a 7mm thick cast-rolled coil; the smelting process includes melting, standing, refining, slag removal and deslagging After degassing, the hydrogen content of the melt is controlled below 0.10 ml / 100gAl;

[0060] Step (2) First cold rolling: Cool the cast-rolled coil obtained in step (1) to room temperature, and then undergo the first cold rolling treatment to obtain a cold-rolled billet; the uncoiling tension of cold rolling is 22N / mm 2 , take-up tension is 31N / mm 2 , the rolling speed ...

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Abstract

The invention relates to an aluminum foil for a power battery and a preparation process of the aluminum foil. The aluminum foil is prepared from the following raw materials in percentage by weight: 0.05-0.2% of Si, 0.2-0.7% of Fe, 0.2% of Cu, 0.05% of Mn, 0.05% of Mg, 0.05% of Zn, 0.01-0.06% of Ti and the balance of Al. The preparation process of the aluminum foil comprises six steps of casting, primary cold rolling, annealing, secondary cold rolling, foil rolling and slitting. The prepared aluminum foil is large in surface tension coefficient, the surface tension of the aluminum foil can reach 31 dynes or above without subsequent oil removal treatment, usage requirement of a user is met, technological process is simplified, production cost is reduced, the surface is attractive and fine, the preparation technology is simple, the route is mature, and wide industrial application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of power battery production, and in particular relates to an aluminum foil for a power battery and a preparation process thereof. Background technique [0002] The power battery is the power source that provides the power source for the tool, and mostly refers to the battery that provides power for electric vehicles, electric trains, electric bicycles, etc. As a commonly used power battery, lithium battery has the characteristics of high charging density, long life and high unit cost. In the structure of lithium batteries, aluminum foil is one of the important inner components. Aluminum foil is used as the current collector of lithium-ion batteries. Its surface properties affect the interface structure and internal resistance of the positive electrode, which directly affects the rate performance and capacity of the battery. , cycle performance and other characteristics. [0003] Alloys such as 1060 and 107...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22F1/04B21B1/40C22C1/02
Inventor 韩山时新举
Owner 郑州金辉新能源电子材料有限公司
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