A kind of battery aluminum alloy foil and its preparation method, battery current collector

A technology of aluminum alloy foil and battery collector, which is applied in battery electrodes, metal rolling, electrode carrier/current collector, etc., to achieve the effect of refining the casting structure and grain, good plate shape, and improving mechanical properties

Active Publication Date: 2022-03-29
滨州宏展铝业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1100H18 ordinary battery foil of the prior art, thickness > 0.015mm, tensile strength > 180MPa, elongation > 2.0%

Method used

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  • A kind of battery aluminum alloy foil and its preparation method, battery current collector
  • A kind of battery aluminum alloy foil and its preparation method, battery current collector
  • A kind of battery aluminum alloy foil and its preparation method, battery current collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Produce 1100H18 high-performance single-sided photocell foil, the finished product thickness is 0.012mm, and the finished product width is 1060mm.

[0069] Its production process includes: smelting→casting→sawing and milling→homogenization treatment→hot rolling→cold rolling→intermediate annealing→cold rolling→rough rolling→intermediate rolling→coiling→finish rolling→slitting.

[0070] Melting: Melting 90 tons of pure aluminum ingots (purity 99.7%), 900kg iron powder (Al-Fe80%), 135kg copper powder (Al-Cu80%) ​​and 16kg titanium powder (Al-Ti80%) as raw materials, the melting temperature 730~750℃, through 3 times of electromagnetic stirring, each time through three rotation cycles of forward, reverse and forward, each cycle is 8min.

[0071] Casting: The starting temperature of the holding furnace is 690~710°C, the heating temperature of the filter plate is 760~790°C, the casting melt temperature of the T-shaped launder is 680~700°C, and the casting speed is 60mm / min. T...

Embodiment 2

[0083] Similar to Example 1, the only difference is:

[0084] a. Homogenization treatment: the first-stage homogenization heating temperature is 550°C, and the holding time is 8h; the second-stage homogenization heating temperature is 440°C, and the holding time is 0.5h.

[0085] b. Hot rolling: the rolling speed of the last pass of rough rolling is 2m / s, and the processing rate of the last pass is 40%. The thickness of the hot-rolled coil is 5.0mm, and the hot-rolled coiling temperature is 250°C.

[0086] c. After intermediate annealing, the cold rolling roll has a crown of 28%, a roughness of Ra 0.28um, a processing rate of 50% per pass, and a metal temperature of 110°C after curling.

[0087] d. Foil rolling: 1st and 2nd pass of foil rolling (rough rolling) roll crown 35%, roughness Ra 0.20um; foil rolling 3rd, 4th pass (intermediate rolling) roll crown 50%, roughness Ra 0.16um ; Foil rolling 5 passes (finish rolling) roll crown 60%, roughness Ra 0.12um.

[0088] e. Spec...

Embodiment 3

[0093] Similar to Example 1, the only difference is:

[0094] a. Homogenization treatment: the first homogenization heating temperature is 540°C, and the holding time is 6h; the second homogenization heating temperature is 420°C, and the holding time is 2h.

[0095] b. Hot rolling: the rolling speed of the last pass of rough rolling is 1m / s, and the processing rate of the last pass is 60%. The thickness of the hot-rolled coil is 4.0mm, and the hot-rolled coiling temperature is 280°C.

[0096] c. After intermediate annealing, the cold rolling roll has a crown of 25%, a roughness of Ra 0.2um, a processing rate of 50% per pass, and a metal temperature of 100°C after curling.

[0097] d. Foil rolling: 1st and 2nd pass of foil rolling (rough rolling) roll crown 35%, roughness Ra 0.17um; foil rolling 3rd, 4th pass (intermediate rolling) roll crown 45%, roughness Ra 0.14um ; Foil rolling 5 passes (finish rolling) roll crown 55%, roughness Ra 0.12um.

[0098] e. Spectral analysis i...

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Abstract

The application discloses a battery aluminum alloy foil, a preparation method and a battery current collector, belonging to the technical field of nonferrous metallurgy. The composition and mass percentage of the battery aluminum alloy foil in this patent are: Si: 0~0.10%, Fe: 0.75%~0.85%, Cu: 0.10%~0.20%, Mn: 0~0.03%, Mg: 0~ 0.03%, Zn: 0~0.03%, Ti: 0.01%~0.02%, Al≥99.00%, and the rest are impurity elements; the hydrogen content is controlled below 0.12ml / 100gAl. The aluminum foil has a thickness of 0.010-0.015mm, a tensile strength greater than 260MPa, an elongation greater than 4.0%, and a good plate shape, meeting the requirements of high-performance collector battery foils for power batteries.

Description

technical field [0001] The present application relates to the technical field of nonferrous metallurgy, to the production of aluminum foil, and in particular to a 1100H18 battery aluminum alloy foil, a preparation method thereof, and a battery current collector. Background technique [0002] 1100 alloy belongs to the 1000 series of pure aluminum alloys, which has good ductility, formability, corrosion resistance, electrical conductivity and flexibility, high oxidation potential, and the dense oxide film on the surface plays a protective role. Therefore, the single-sided photovoltaic aluminum foil made of 1100 alloy It is widely used as the positive electrode collector of lithium-ion batteries. The 1100H18 ordinary battery foil in the prior art has a thickness > 0.015mm, a tensile strength > 180MPa, and an elongation > 2.0%. However, with the continuous development of new energy vehicles, it is required to increase the energy density of the battery. The thickness of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22F1/04B21B1/40B21B3/00H01M4/66
CPCC22C21/00C22F1/04B21B1/40B21B3/00H01M4/662B21B2003/001Y02E60/10
Inventor 杨新涛张飞飞尹世峰王新建叶俊
Owner 滨州宏展铝业科技有限公司
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