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Aluminum foil for 1070 high-performance lithium ion battery and preparation method of aluminum foil

A lithium-ion battery, high-performance technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of low strength and elongation of 1070 aluminum alloy

Active Publication Date: 2020-10-20
NORTH CHINA ALUMINUM
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a 1070 high-performance aluminum foil for lithium-ion batteries to solve the problems of low strength and elongation of the existing 1070 aluminum alloy

Method used

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  • Aluminum foil for 1070 high-performance lithium ion battery and preparation method of aluminum foil
  • Aluminum foil for 1070 high-performance lithium ion battery and preparation method of aluminum foil
  • Aluminum foil for 1070 high-performance lithium ion battery and preparation method of aluminum foil

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preparation example Construction

[0035] The preparation method of the above-mentioned 1070 high-performance aluminum foil for lithium-ion batteries comprises the following steps:

[0036] S1. Ingredients, weigh the corresponding raw materials according to the composition design. The raw materials include scraps of the 1070 aluminum alloy with a mass percentage not higher than 15%, and the remaining aluminum is pure aluminum ingots. The use of the aluminum alloy scrap can realize the reuse of the scrap and reduce the material cost.

[0037] S2. Smelting: Put the prepared raw materials into the melting furnace for melting, and refine the aluminum alloy liquid after the raw materials are completely melted; add the Al-Ti intermediate alloy into the melting furnace during the melting. During smelting, the charge should be kept clean, and the quality of the melt should be good to meet the production requirements of aluminum foil. The hydrogen content is ≤0.12ml / 100Al, the refining temperature is ≥730°C, the refin...

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Abstract

The invention discloses an aluminum foil for a 1070 high-performance lithium ion battery, and belongs to the technical field of aluminum foils for lithium ion batteries. The aluminum foil comprises the following components of, in percentage by mass, 0.01%-0.2% of Si, 0.01%-0.25% of Fe, 0.02%-0.05% of Cu, 0.01%-0.03% of Mn, 0.001%-0.03% of Mg, 0.001%-0.05% of Zn, 0.001%-0.05% of V, 0.01%-0.03% of Ti, less than or equal to 0.03% of other single impurity elements and the balance aluminum. The preparation method of the aluminum foil for the 1070 high-performance lithium ion battery comprises the following steps of burdening, smelting, filtering, cast rolling, cold rolling, foil rolling, slitting and packaging. The tensile strength of the 1070 high-performance aluminum foil for the lithium ionbattery prepared by the method is greater than or equal to 210 MPa, and the elongation is greater than or equal to 2.5%, therefore, by adopting the aluminum foil for the 1070 high-performance lithiumion battery and the preparation method of the aluminum foil, the problems of low strength and elongation of the existing 1070 aluminum alloy can be solved.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil for lithium ion batteries, and in particular relates to a 1070 high-performance aluminum foil for lithium ion batteries and a preparation method thereof. Background technique [0002] Due to the advantages of high working voltage, light weight, large specific energy, long cycle life, safety, no memory effect, and no pollution to the environment, lithium-ion batteries have developed rapidly in recent years and become ideal for mobile communications, notebook computers, and digital products. power supply. With the continuous improvement of people's calls for energy conservation, environmental protection and green economy, especially the rapid improvement of new energy vehicles, lithium-ion batteries are also playing an increasingly important role in automotive power batteries and large-scale energy storage batteries. Lithium-ion batteries are being improved and developed in the direction of h...

Claims

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Application Information

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IPC IPC(8): C22C21/00B21B1/40B22D11/119C22C1/03C22F1/04H01M4/66H01M4/70H01M10/0525
CPCB21B1/40B22D11/119C22C1/026C22C1/03C22C21/00C22F1/04H01M4/662H01M4/70H01M10/0525Y02E60/10
Inventor 温倩曹建峰张深阳高景忠佟颖夏卫华刘建星李晋王进卫杨翠琢孟庆伟
Owner NORTH CHINA ALUMINUM
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