Battery aluminum foil with high mechanical property and high conductivity and production method thereof

A technology of electrical conductivity and mechanical properties, which is applied in the field of battery aluminum foil and its production, can solve the problems of high strength and other contradictions, and achieve the goals of improving electrical conductivity and surface wetting performance, improving tensile strength, improving mechanical properties and stability Effect

Pending Publication Date: 2022-07-22
神隆宝鼎新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high surface dyne value control is contradictory to high strength, and extremely high shape requirements and thickness differences are contradictory to high-strength ultra-thin rolling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a. Smelting: Smelting the following battery aluminum foil alloy components, the mass percentage of each element in the battery aluminum foil alloy components is: Si: 0.07%, Fe: 0.05%, Cu: 0.3%, Mn: 0.03%, Zn: 0.01 %, Ti: 0.02%, Ce: 0.02%, others 0.001%, Al: 99.60%.

[0022] b. Casting and rolling: the thickness of casting and rolling is 6.0mm.

[0023] c. Cold rolling: rolling from 6.0mm thickness to 1.8mm, heating the 1.8mm thickness aluminum coil to 500~550℃ in an annealing furnace and holding it for 12h for intermediate annealing, and then rolling to 0.2mm thickness after intermediate annealing and cooling. During the cold rolling process, the pass distribution is 6mm→3.5mm→1.8mm→0.9mm→0.45mm→0.2mm, the speed is controlled at 200m / min~500m / min, the oil temperature is kept at 50~60℃, and the rolling force is 250~320t.

[0024] d. Foil rolling: starting from 0.2mm thickness, the finished product thickness of foil rolling is 0.013mm; the pass distribution is 0.2mm→0.1m...

Embodiment 2

[0029] a. Smelting: Smelting the following battery aluminum foil alloy components, the mass percentage of each element in the battery aluminum foil alloy components is: Si: 0.02%, Fe: 0.18%, Cu: 0.02%, Mn: 0.03%, Zn: 0.01 %, Ti: 0.03%, Ce: 0.02%, others 0.001%, Al: 99.60%.

[0030] b. Casting and rolling: the thickness of casting and rolling is 7.0mm.

[0031] c. Cold rolling: rolling from 7.0mm thickness to 2.0mm, heating the 2.0mm thickness aluminum coil to 500~550℃ in an annealing furnace and holding it for 15h for intermediate annealing, and then rolling to 0.3mm thickness after intermediate annealing and cooling. The pass distribution in the cold rolling process is 7mm→4mm→2.0mm→1.1mm→0.55mm→0.3mm, the speed is controlled at 200m / min~450m / min, the oil temperature is kept at 50~60℃, and the rolling force is 250~300t.

[0032] d. Foil rolling: starting from the thickness of 0.3mm, the thickness of the finished product is rolled to a thickness of 0.013mm. The pass distribu...

Embodiment 3

[0037] a. Smelting: Smelting the following battery aluminum foil alloy components, the mass percentage of each element in the battery aluminum foil alloy components is: Si: 0.07%, Fe: 0.05%, Cu: 0.3%, Mn: 0.03%, Zn: 0.01 %, Ti: 0.02%, Ce: 0.02%, others 0.001%, Al: 99.60%.

[0038] b. Casting and rolling: the thickness of casting and rolling is 6.0mm.

[0039] c. Cold rolling: rolling from 6.0mm thickness to 3.8mm, heating the 3.8mm thickness aluminum coil to 500~550℃ in an annealing furnace and holding it for 10h for intermediate annealing, after intermediate annealing, rolling to 0.45mm thickness for two For the second annealing, the temperature was raised to 200~300 °C and kept for 12h during the second annealing, and the thickness was rolled to 0.2mm after the second annealing and cooling. The pass distribution in the cold rolling process is 6mm→3.8mm→1.8mm→0.9mm→0.45mm→0.2mm, the speed is controlled at 200m / min~500m / min, the oil temperature is kept at 50~60℃, and the roll...

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Abstract

The invention belongs to the technical field of aluminum foil processing, and discloses a battery aluminum foil with high mechanical property and high conductivity, and 0.01-0.05% by mass of cerium element is added into alloy components of the battery aluminum foil. The invention also discloses a production method of the battery aluminum foil with high mechanical property and high conductivity. The production method comprises the following steps: smelting: smelting battery aluminum foil alloy components added with cerium element; casting and rolling, wherein the casting and rolling thickness is 6.0-7.0 mm; cold rolling: multi-pass cold rolling and intermediate annealing are performed, and the thickness of 0.2-0.3 mm is rolled after annealing and cooling; foil rolling is conducted, specifically, foil rolling is conducted from the thickness of 0.2-0.3 mm to the finished product thickness of 0.009-0.02 mm; performing recovery annealing and oil removal; and slitting, inspecting and warehousing. According to the invention, the rare earth element cerium is added into the alloy components of the battery aluminum foil, and the cold rolling process is adjusted, so that finer crystal grains can be obtained, the mechanical property of the battery foil is improved, and meanwhile, the conductivity, the stability and the surface wettability of the battery foil are improved by adding high-vacuum low-temperature recovery annealing oil removal.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil processing, and relates to a battery aluminum foil with high mechanical properties and high electrical conductivity and a production method thereof. Background technique [0002] Battery aluminum foil is a deep-processed product of aluminum foil, so it is much more difficult to produce than ordinary aluminum foil, and there are many key technologies. With the continuous development of battery technology, due to various considerations, many users are constantly improving the strength requirements of battery foil products. At present, the requirements for strength above 200MPa are very common, and some users even require strengths above 270MPa or even 300MPa. The strength limit of cold hardening of aluminum foil products has been reached. At the same time, when the strength reaches a certain level, it is difficult to ensure the corresponding elongation rate, and its production is extremely dif...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22F1/04B21B1/40
CPCC22C1/026C22F1/04B21B1/40Y02E60/10
Inventor 陈忠德陈凯曹晶
Owner 神隆宝鼎新材料有限公司
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