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Preparation method of aluminum for new energy battery box

A battery box and new energy technology, which is applied in the field of preparation of aluminum for new energy battery boxes, can solve the problems of high cost, immature technology, and inability to make major changes in the structure, and achieve weight reduction, high strain hardening index, The effect of low yield ratio

Inactive Publication Date: 2018-11-23
中铝东南材料院(福建)科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are three main ways to reduce the weight of the battery box: first, through the optimized design of the battery box structure, due to the arrangement or assembly of the batteries inside the battery pack, the structure generally cannot be greatly changed; the second is to adopt new processing and manufacturing technologies, such as aluminum profile Friction stir method and thermoforming method, but they are faced with problems such as high cost and immature technology; the third is to use new materials, such as replacing steel plates with aluminum plates. Since the density of aluminum is only 1 / 3 of steel, it has strong corrosion resistance and Good heat dissipation, is the best choice for new energy vehicle battery box material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) After smelting, refining, and online deslagging and degassing of aluminum alloy raw materials, semi-continuous casting produces AL-Mg aluminum alloy flat ingots with specifications of 600×1850×6500;

[0021] (2) After sawing and milling the flat ingot, it is heated at 500°C for 3 hours and rolled out of the furnace. The thickness of the hot rolling exit is 2.6mm, and the final hot rolling temperature is 320°C;

[0022] (3) After rolling the formed hot-rolled coil to an intermediate thickness of 1.14mm on a cold rolling mill, enter an annealing furnace with nitrogen protection for intermediate annealing at 320°C for 2 hours;

[0023] (4) After the 1.14mm annealed coil is cold-rolled to a finished product thickness of 0.8mm, it enters the nitrogen protection annealing furnace again, and the finished product is annealed at 320°C for 2 hours, and the processing rate between the middle thickness and the finished product thickness is 29.82%;

[0024] (5) Finally, it is st...

Embodiment 2

[0027] (1) After smelting, refining, and online deslagging and degassing of aluminum alloy raw materials, semi-continuous casting produces AL-Mg aluminum alloy flat ingots with specifications of 550×1450×7500;

[0028] (2) After sawing and milling the slab, it is heated at 480°C for 2 hours and rolled out of the furnace. The thickness of the hot rolling exit is 4.0mm, and the final hot rolling temperature is 300°C;

[0029] (3) After rolling the formed hot-rolled coil to an intermediate thickness of 1.67mm on a cold rolling mill, enter an annealing furnace with nitrogen protection for intermediate annealing at 340°C for 3 hours;

[0030] (4) After the 1.67mm annealed coil is cold-rolled to a finished product thickness of 1.0mm, it enters the nitrogen protection annealing furnace again, and the finished product is annealed at 340°C for 3 hours, and the processing rate between the middle thickness and the finished product thickness is 40%;

[0031] (5) Finally, it is straightene...

Embodiment 3

[0034] (1) After smelting, refining, and online deslagging and degassing of aluminum alloy raw materials, semi-continuous casting produces AL-Mg aluminum alloy flat ingots with specifications of 580×1900×6200;

[0035] (2) After sawing and milling the flat ingot, it is heated at 510°C for 2 hours and rolled out of the furnace. The thickness of the hot-rolled exit is 3.5mm, and the final hot-rolling temperature is 320°C;

[0036] (3) After the formed hot-rolled coil is rolled to an intermediate thickness of 1.5mm on a cold rolling mill, it enters an annealing furnace under nitrogen protection for intermediate annealing at 320°C for 2 hours;

[0037] (4) After the 1.5mm annealed coil is cold-rolled to a finished product thickness of 1.2mm, it enters the nitrogen protection annealing furnace again, and the finished product is annealed at 320°C for 2 hours, and the processing rate between the middle thickness and the finished product thickness is 20%;

[0038] (5) Finally, it is s...

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Abstract

The invention relates to a preparation method of aluminum for a new energy battery box. The preparation method comprises the following steps: (1) smelting and refining aluminum alloy raw materials, carrying out de-slagging and degassing on line, and then carrying out semi-continuous casting to obtain an AL-Mg-based aluminum alloy slab; (2) sawing and milling the slab, and then heating to 480-520 DEG C and preserving heat for 1 to 5 hours; (3) hot-rolling the slab discharged, wherein the hot rolling thickness is 2.0-6.0 mm, and the finishing rolling temperature is controlled at 280-360 DEG C; (4) coiling and rolling the hot rolling product formed in step (3) to an intermediate thickness on a cold rolling mill, and carrying out intermediate annealing in a nitrogen protective annealing furnace; (5) cooling the product discharged, rolling to the thickness of a finished product, and then carrying out finishing annealing in the nitrogen protective annealing furnace again; and (6) After the finishing annealing, straightening and filming on a transverse cutting machine, and then cutting into aluminum plates. The preparation method fulfills the purpose of reducing the weight of the new energy battery box by replacing steel with aluminum.

Description

technical field [0001] The invention relates to a method for preparing aluminum for new energy battery boxes. Background technique [0002] Due to the arrangement of multiple sets of battery packs in new energy vehicles, the weight of the vehicle will increase significantly. The design of the battery pack should not only consider sealing, waterproof, dustproof, corrosion resistance, and insulation, but also consider the heat dissipation and electrostatic shielding of the battery box. Therefore, the selection and lightweight of the materials used in the battery box are particularly important. New energy vehicles actively use lightweight materials to reduce the weight of the vehicle so that more battery modules can be assembled to increase the cruising range. [0003] There are three main ways to reduce the weight of the battery box: first, through the optimized design of the battery box structure, due to the arrangement or assembly of the batteries inside the battery pack, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047C22F1/02
CPCC22F1/047C22F1/02
Inventor 黄瑞银阙石生朱晓振冉继龙刘旺杨本勇
Owner 中铝东南材料院(福建)科技有限公司