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Battery aluminum alloy foil, preparation method thereof and battery current collector

A technology of aluminum alloy foil and battery assembly, applied in the direction of battery electrodes, metal rolling, electrode carriers/collectors, etc., to achieve the effects of refining the casting structure grains, good plate shape, and improving mechanical properties

Active Publication Date: 2021-12-14
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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  • Battery aluminum alloy foil, preparation method thereof and battery current collector
  • Battery aluminum alloy foil, preparation method thereof and battery current collector
  • Battery aluminum alloy foil, preparation method thereof and battery current collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1100H18 produce high-performance single light cell foil, thickness 0.012 mm finished, finished width 1060mm.

[0069] Its production process comprising: melting → casting → sawing and milling treatment → hot rolling → homogenizing → cold rolling → annealing → cold rolling → intermediate → rough rolling in finishing rolling → → → bonding roll slitting.

[0070] Melting: The raw material 90 tons pure aluminum ingot (purity 99.7%), 900kg iron (Al-Fe80%), 135kg agent copper (Al-Cu80%) ​​and titanium 16kg agent (Al-Ti80%), smelting, melting temperature 730 ~ 750 ℃, by electromagnetic stirring three times, each time through positive and negative, positive rotation of three cycles, each cycle 8min.

[0071] Casting: casting from the holding furnace the temperature of 690 ~ 710 ℃, the filter plate heating temperature 760 ~ 790 ℃, T-type casting launder melt temperature of 680 ~ 700 ℃, the casting speed of 60mm / min. Semi-continuous casting of flat ingot specifications for 560mm * ...

Embodiment 2

[0083] Similar to Example 1, except that only:

[0084] a, the equalization process: the first uniform heating temperature 550 ℃, 8H holding time; second stage homogenization heating temperature 440 ℃, incubated 0.5h.

[0085] b, hot rolling: rough rolling final pass rolling speed of 2m / s, final pass processing rate of 40%. HRC thickness of 5.0mm, coiling temperature 250 ℃.

[0086] C, chill roll crown 28% after the intermediate annealing roughness Ra 0.28um, per pass working ratio of 50%, the temperature of the metal crimp 110 ℃.

[0087] d, foil rolling: rolling foil 2 passes (roughing) roll crown 35%, the roughness Ra 0.20um; 3,4 foil pass rolling (intermediate rolling) roll crown 50%, the roughness Ra 0.16um ; 5 times the foil rolling (finishing) roll crown 60%, the roughness Ra 0.12um.

[0088] e, spectral component alloy foil as the content percentage: Si: 0.04%, Fe: 0.75%, Cu: 0.17%, Mn: 0.008%, Mg: 0.005%, Zn: 0.005%, Ti: 0.017%, Al: 99.00% the rest is impurity elements....

Embodiment 3

[0093] Similar to Example 1, except that only:

[0094] a, the equalization process: the first uniform heating temperature 540 ℃, holding time 6H; second stage homogenization heating temperature 420 ℃, incubated 2h.

[0095] b, hot rolling: rough rolling final pass rolling speed 1m / s, final pass processing was 60%. HRC thickness of 4.0mm, coiling temperature 280 ℃.

[0096] C, chill roll crown 25% after the intermediate annealing roughness Ra 0.2um, per pass working ratio of 50%, the temperature of the metal crimp 100 ℃.

[0097] d, foil rolling: rolling foil 2 passes (roughing) roll crown 35%, the roughness Ra 0.17um; 3,4 foil pass rolling (intermediate rolling) roll crown 45%, the roughness Ra 0.14um ; 5 times the foil rolling (finishing) roll crown 55%, the roughness Ra 0.12um.

[0098] e, spectral content of the ingot alloy composition percentages: Si: 0.03%, Fe: 0.84%, Cu: 0.10%, Mn: 0.005%, Mg: 0.003%, Zn: 0.003%, Ti: 0.016%, Al: 99.00 %, the remainder being impurities.

...

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Abstract

The invention discloses a battery aluminum alloy foil, a preparation method and a battery current collector, and belongs to the technical field of nonferrous metallurgy. The battery aluminum alloy foil comprises the following components in percentage by mass: 0 to 0.10 percent of Si, 0.75 to 0.85 percent of Fe, 0.10 to 0.20 percent of Cu, 0 to 0.03 percent of Mn, 0 to 0.03 percent of Mg, 0 to 0.03 percent of Zn, 0.01 to 0.02 percent of Ti, more than or equal to 99.00 percent of Al and the balance of impurity elements; and the hydrogen content is controlled below 0.12 ml / 100g Al. The thickness of the aluminum foil is 0.010-0.015 mm, the tensile strength is greater than 260 MPa, the elongation is greater than 4.0%, the plate shape is good, and the requirement of a high-performance current collector battery foil for a power battery is met.

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 Applications(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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