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Aluminum plate and strip for power battery case and production method thereof

A technology of power battery and production method, which is applied in the direction of battery pack parts, battery case/cover, battery case/cover material, etc., which can solve the problems of poor deep-drawing and tensile properties, uneven structure, and coarse grains of products, etc. Achieve the effects of increasing elongation, preventing coarsening, and improving toughness

Active Publication Date: 2017-11-10
HENAN MINGTAI AL INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, aluminum sheets and strips made of common 3003 standard aluminum alloy formulations and production methods often have uneven structures and coarse grains, resulting in poor deep drawing and tensile properties of the products, and it is difficult to meet the production requirements of electric vehicle power battery cases.

Method used

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  • Aluminum plate and strip for power battery case and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033]An aluminum plate and aluminum strip for a power battery case, the mass percentage of its chemical composition is: the composition contains Si0.1%, Fe0.45%, Cu0.09%, Mn1.05%, Zn0.04%, Ti0.04%, The total of impurity elements is ≤0.10%, and the rest is Al.

[0034] A production method of an aluminum plate and an aluminum strip for a power battery case, comprising the following steps:

[0035] (1) Melting: Add 16 tons of pure aluminum ingots and 24 tons of 3-series aluminum alloy waste into the melting furnace, melt for 6 hours to obtain a molten aluminum alloy matrix with a melt temperature of 720-750°C; scrape out the surface of the molten aluminum alloy For scum, take samples to analyze the chemical composition of the aluminum alloy melt matrix, compare the chemical composition requirements of the aluminum plates and strips used for power battery shells, and add aluminum alloy additives to the aluminum alloy melt matrix: 15Kg of titanium additives, 20Kg of iron additives...

Embodiment 2

[0052] An aluminum plate and aluminum strip for a power battery case, the mass percentage of its chemical composition is: the composition contains Si0.15%, Fe0.45%, Cu0.1%, Mn1.1%, Zn0.03%, Ti0.05%, The total of impurity elements is ≤0.10%, and the rest is Al.

[0053] A production method of an aluminum plate and an aluminum strip for a power battery case, comprising the following steps:

[0054] (1) Melting: Add 20 tons of pure aluminum ingots and 20 tons of 3-series aluminum alloy waste into the melting furnace, and melt for 7 hours to obtain a molten aluminum alloy matrix with a melt temperature of 720-750°C; scrape out the surface of the molten aluminum alloy For dross, take samples to analyze the chemical composition of the aluminum alloy melt matrix, compare the chemical composition requirements of the aluminum plates and strips used for power battery shells, and add aluminum alloy additives to the aluminum alloy melt matrix: 21g of titanium additives, 43Kg of iron addit...

Embodiment 3

[0071] An aluminum plate and aluminum strip for a power battery case, the mass percentage of its chemical composition is: the composition contains Si0.13%, Fe0.5%, Cu0.12%, Mn1.1%, Zn0.02%, Ti0.04%, The total of impurity elements is ≤0.10%, and the rest is Al.

[0072] A production method of an aluminum plate and an aluminum strip for a power battery case, comprising the following steps:

[0073] (1) Melting: Add 18 tons of pure aluminum ingots and 22 tons of 3-series aluminum alloy scraps to the melting furnace, and melt for 8 hours to obtain an aluminum alloy melt matrix with a melt temperature of 720-750°C; scrape out the surface of the aluminum alloy melt For scum, take samples to analyze the chemical composition of the aluminum alloy melt matrix, compare the chemical composition requirements of the aluminum plates and strips used for power battery shells, and add aluminum alloy additives to the aluminum alloy melt matrix: 16Kg of titanium additives, 58Kg of iron additives...

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Abstract

The invention relates to an aluminum plate, an aluminum strip for a power battery case and a production method thereof. The invention controls the percentages of Si, Fe, Cu, Mn, Zn, and Ti in the aluminum alloy to increase useful components and reduce harmful components; And in the smelting section of the production process, large-scale permanent magnetic stirring equipment is used. The casting process adopts a casting machine with automatic speed regulation system. The uniform heat treatment adopts segmental soaking, strictly controls the temperature of aluminum alloy ingots, hot rough rolling for 11 passes, and the finished product is annealed. The electric annealing furnace is used in the workshop; during the whole production stage, the temperature of the aluminum alloy is strictly controlled to prevent the coarse grain of the material during the production process, and the aluminum plate and aluminum strip produced have good deep drawing and tensile properties.

Description

technical field [0001] The invention relates to an aluminum alloy and a production method thereof, in particular to an aluminum plate and aluminum strip for a power battery case and a production method thereof. Background technique [0002] With the development of science and technology, the improvement of people's living standards and the country's vigorous promotion of green and environmentally friendly travel, electric vehicles, motorcycles and other vehicles suitable for battery drive have exploded, driving a substantial increase in the demand for deep-drawn aluminum sheets and strips for batteries. The power battery is one of the core components of new energy electric vehicles. The battery packaging process is very important in the production process of the power battery. Good battery packaging determines the safety and life of the battery. Therefore, it is necessary to choose an excellent battery shell material , and select the optimal packaging process according to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/02C22C1/06C22F1/04H01M2/02H01M50/119H01M50/131
CPCC22C1/026C22C1/06C22C21/00C22F1/04H01M50/116Y02E60/10
Inventor 李国锋
Owner HENAN MINGTAI AL INDUSTRIAL CO LTD
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