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Aluminum alloy strip for integrated battery cover plate and preparing method of aluminum alloy strip

A technology for aluminum alloy strips and battery cover plates, which is applied in battery pack parts, circuits, electrical components, etc., can solve the problems of unspecified casting process and processing softening characteristics, and achieve excellent laser welding performance, stable blasting pressure, The effect of cost advantage

Inactive Publication Date: 2018-01-19
CHINALCO RUIMIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only applicable to the production method of continuous annealing furnace, and does not explain the casting process and processing softening characteristics.

Method used

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  • Aluminum alloy strip for integrated battery cover plate and preparing method of aluminum alloy strip
  • Aluminum alloy strip for integrated battery cover plate and preparing method of aluminum alloy strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The composition of the aluminum alloy strip is calculated by mass fraction: Fe 1.3%, Mn 0.38%, Si 0.1%, Ti 0.008%, Cu 0.002%, Mg 0.006%, Zn 0.003%, and the balance is aluminum and unavoidable impurities.

[0037] A method for preparing the aluminum alloy strip for the integrated battery cover as described above, the specific steps are:

[0038] (1) Cast aluminum alloy flat ingots with specifications of 500mm*1350mm*5800mm by semi-continuous casting method, and the casting speed is 50mm / min;

[0039] (2) After the slab is milled with 12mm / large surface, it enters the vertical pusher furnace for homogenization heat treatment, the heating temperature is 580°C, the holding time is 10 hours, and it is hot-rolled to a hot-rolled coil with a thickness of 8mm, and the final rolling temperature is 320°C;

[0040] (3) The hot-rolled coils are cold-rolled in the cold-rolling mill to a finished product thickness of 1.5mm, and the total processing rate of cold-rolling is 81.25%;

...

Embodiment 2

[0045] The composition of the aluminum alloy strip is calculated by mass fraction: Fe 1.3%, Mn 0.3%, Si 0.12%, Ti 0.008%, Cu 0.003%, Mg 0.002%, Zn 0.004%, and the balance is aluminum and unavoidable impurities.

[0046] A method for preparing the aluminum alloy strip for the integrated battery cover as described above, the specific steps are:

[0047] (1) Cast aluminum alloy flat ingots with specifications of 560mm*1300mm*6000mm by semi-continuous casting method, and the casting speed is 55mm / min;

[0048] (2) The slab enters the vertical pusher furnace for homogenization heat treatment through milling of 15mm / large surface, the heating temperature is 620°C, the holding time is 8 hours, and it is hot-rolled to a hot-rolled coil with a thickness of 4.0mm, and the final rolling temperature is 280°C;

[0049] (3) The hot-rolled coils are cold-rolled in the cold-rolling mill to a finished product thickness of 1.0mm, and the total processing rate of cold-rolling is 75%;

[0050] (...

Embodiment 3

[0054] The composition of the aluminum alloy strip is calculated by mass fraction: Fe 1.32%, Mn 0.48%, Si 0.12%, Ti 0.007%, Cu 0.003%, Mg 0.002%, Zn 0.003%, and the balance is aluminum and unavoidable impurities.

[0055] A method for preparing the aluminum alloy strip for the integrated battery cover as described above, the specific steps are:

[0056] (1) Cast aluminum alloy flat ingots with specifications of 560mm*1300mm*5800mm by semi-continuous casting method, and the casting speed is 60mm / min;

[0057] (2) Flat ingot The flat ingot is milled with 18mm / large surface and enters the vertical pusher furnace for homogenization heat treatment. The heating temperature is 610°C, the holding time is 15 hours, and it is hot-rolled to a hot-rolled coil with a thickness of 6.0mm. The final rolling temperature is 320 ℃;

[0058] (3) The hot-rolled coils are cold-rolled in the cold-rolling mill to a finished product thickness of 1.2mm, and the total processing rate of cold-rolling is...

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Abstract

The invention discloses an aluminum alloy strip for an integrated battery cover plate and a preparing method of the aluminum alloy strip. The aluminum alloy strip comprises components including 1.2%-1.5% of Fe, 0.25%-0.5% of Mn, 0.05%-0.2% of Si, 0.005%-0.1% of Ti, smaller than or equal to 0.05% of Cu, smaller than or equal to 0.05% of Mg, smaller than or equal to 0.05% of Zn and the balance aluminum and inevitable impurities. Through component design and technology control, the characteristics that when an Al-Fe-Mn alloy is machined to a certain degree, softening happens, and a high laser absorbing rate and a low heat conductivity coefficient are achieved are utilized, during downstream manufacturing, the battery cover plate and an anti-explosion port are directly integrally punched and formed, annealing and welding are avoided, an anti-explosion sheet is uniform in thickness and stable in performance, the anti-explosion sheet and cover plate welding procedure and leakage, instable detonation pressure and other hidden danger caused by welding are reduced, and the preparing method of the aluminum alloy strip for the battery cover plate is novel.

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 integrated battery cover plate and a preparation method thereof. Background technique [0002] As one of the important structural parts of the battery, the battery cover and explosion-proof sheet directly affect the key indicator of battery performance-safety. Therefore, the stability of the performance of the battery cover plate and the explosion-proof disc is very important, not only requiring good welding performance and corrosion resistance, but also a stable burst pressure. [0003] At present, domestic battery cover plates and explosion-proof disc products are mainly combined, and individual manufacturers try to conduct research and development on the integration of cover plates and explosion-proof vents. The combination method is specifically that the explosion-proof sheet is annealed after thinning and deep dr...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03C22F1/04H01M2/04H01M50/155
CPCY02E60/10
Inventor 黄瑞银阙石生徐始祥廖明顺
Owner CHINALCO RUIMIN
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