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Aluminum alloy strip for explosion-proof valve of new energy battery cover and preparation method thereof

A technology of aluminum alloy strip and battery cover, which is applied in the field of aluminum alloy strip for explosion-proof valve of new energy battery cover and its preparation, to achieve excellent laser welding performance and reduce leakage

Active Publication Date: 2019-02-22
CHINALCO RUIMIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not suitable for the production of ordinary box annealing furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The composition of the aluminum alloy strip is calculated by mass fraction: Fe 1.5%, Mn 0.33%, Si 0.16%, Ti 0.009%, Cu 0.006%, Mg 0.007%, Zn 0.006%, and the balance is Al and unavoidable impurities.

[0037] Its manufacturing method, concrete steps are:

[0038] (1) After smelting, refining, deslagging and degassing, semi-continuous casting is cast into aluminum alloy flat ingots with specifications of 560mm*1350mm*5800mm;

[0039] (2) After the slab is sawed and milled, it enters the vertical furnace for homogenization heat treatment. The heating temperature is 580°C and the holding time is 10 hours. Then through hot finish rolling and continuous rolling to a hot-rolled coil with a thickness of 6mm, the final rolling temperature is 320°C;

[0040] (3) Cold-roll the hot-rolled coils in the cold-rolling mill to a finished product thickness of 0.8mm;

[0041] (4) After the cold-rolled coil is cleaned and straightened, the finished product is annealed, the annealing temp...

Embodiment 2

[0045] The composition of the aluminum alloy strip is calculated by mass fraction: Fe 1.32%, Mn 0.46%, Si 0.16%, Ti 0.015%, Cu 0.008%, Mg 0.003%, Zn 0.004%, and the balance is Al and unavoidable impurities.

[0046] Its manufacturing method, concrete steps are:

[0047] (1) After smelting, refining, deslagging and degassing, semi-continuous casting is cast into aluminum alloy flat ingots with specifications of 500mm*1500mm*6500mm;

[0048] (2) After the slab is sawed and milled, it enters the vertical furnace for homogenization heat treatment. The heating temperature is 610°C and the holding time is 6 hours. Then through hot finish rolling and continuous rolling to a hot-rolled coil with a thickness of 5mm, the final rolling temperature is 320°C;

[0049] (3) Cold-roll the hot-rolled coils in the cold-rolling mill to a finished product thickness of 0.5 mm;

[0050] (4) After the cold-rolled coil is cleaned and straightened, the finished product is annealed, the annealing tempe...

Embodiment 3

[0054] The composition of the aluminum alloy strip is calculated by mass fraction: Fe 1.25%, Mn 0.41%, Si 0.09%, Ti 0.006%, Cu 0.009%, Mg 0.008%, Zn 0.006%, and the balance is Al and unavoidable impurities.

[0055] Its manufacturing method, concrete steps are:

[0056] (1) After smelting, refining, deslagging and degassing, semi-continuous casting is cast into aluminum alloy flat ingots with specifications of 600mm*1600mm*5500mm;

[0057] (2) After the slab is sawed and milled, it enters the vertical furnace for homogenization heat treatment. The heating temperature is 600°C and the holding time is 20 hours. Then through hot finish rolling and continuous rolling to a hot-rolled coil with a thickness of 8mm, the final rolling temperature is 360°C;

[0058] (3) Cold-roll the hot-rolled coils in the cold-rolling mill to a finished product thickness of 1.2 mm;

[0059] (4) After the cold-rolled coil is cleaned and straightened, the finished product is annealed, the annealing te...

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Abstract

The invention belongs to the field of aluminum alloy strip preparation, and particularly relates to an aluminum alloy strip for an explosion-proof valve of a new energy battery cover and a preparation method of the aluminum alloy strip. The components of the aluminum alloy strip include 1.2%-1.8% of Fe, 0.25%-0.6% of Mn, 0.05%-0.25% of Si, 0.005%-0.1% of Ti, less than or equal to 0.2% of the sum of Cu, Mg and Zn, and the balance Al and unavoidable impurities. The average grain size of a finished product is controlled within 25 microns, and the maximal size of a metal compound is controlled within 25 microns. The thickness tolerance of the aluminum alloy strip is controlled within the range of +2% to -2%. According to the aluminum alloy strip for the explosion-proof valve of the new energy battery cover and the preparation method of the aluminum alloy strip, by optimizing the components and controlling the technology, the aluminum alloy strip for the explosion-proof valve of the new energy battery cover which has stable explosion pressure and excellent laser welding properties is developed, and suitable for production requirements and production modes of current explosion-proof sheets of battery covers.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum alloy strips, and in particular relates to an aluminum alloy strip for an explosion-proof valve of a new energy battery cover and a preparation method thereof. Background technique [0002] With the rapid development of new energy vehicles, batteries are widely used in new energy buses, passenger cars and logistics vehicles. As an important part of the battery, the explosion-proof valve on the battery cover directly affects the key indicator of battery performance - safety. Therefore, the stability of the performance of the rupture disc is very important, and the rupture disc is required to have a stable burst pressure, excellent welding performance and deep drawing performance. [0003] At present, the aluminum strips used for battery cover explosion-proof valves are basically imported from Japan and the United States, and the country is still in the research and development stage. The ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/02C22C1/03C22F1/04B21C37/04
CPCB21C37/04C22C1/026C22C1/03C22C21/00C22F1/04
Inventor 阙石生黄瑞银徐始祥廖明顺吴建新钟森源
Owner CHINALCO RUIMIN