一种铸轧8006合金制备高强高韧超薄动力电池用铝箔的方法

By using the 8006 alloy casting and rolling process, combined with high-temperature recrystallization annealing and multi-stage filtration, a high-strength, high-toughness, and ultra-thin aluminum foil material was prepared. This solved the problem of insufficient creep resistance of existing aluminum foil for lithium-ion batteries under high-temperature conditions, and achieved the high energy density and long life requirements of high-end batteries.

CN122128584BActive Publication Date: 2026-07-17HENAN UNIV OF SCI & TECH +1
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HENAN UNIV OF SCI & TECH
Filing Date
2026-05-07
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing aluminum foil materials for lithium-ion batteries are prone to problems such as strip breakage, tensile deformation, and poor plate shape during ultra-thinning and high-speed coating processes, making it difficult to meet the requirements of high-end power batteries and energy storage batteries for high stiffness and high resistance to deformation. In addition, the 8021 alloy has insufficient creep resistance under high temperature conditions and poor microstructure uniformity, which affects the consistency and service life of the battery foil.

Method used

A method for preparing high-strength, high-toughness, ultra-thin aluminum foil for power batteries using cast-rolled 8006 alloy is proposed. This method involves producing 8006 alloy billets through a casting-rolling process, combined with high-temperature recrystallization annealing, cold rolling, edge trimming, and foil rolling. The alloy composition is controlled to be Si 0.2%–0.3%, Fe 1.2%–1.4%, Cu 0.05%–0.07%, and Mn 0.3%–0.5%. Ceramic aluminum seed crystals, aluminum-titanium-carbon grain refiners, and aluminum-titanium-boron grain refiners are used. An electromagnetic casting crystallizer and multi-stage filters are employed, and the rolling oil formula is optimized to ensure the uniformity and consistent performance of the aluminum foil.

Benefits of technology

It has achieved high strength, good toughness, ultra-thin and easy rolling, and excellent corrosion resistance aluminum foil, which can meet the needs of high-end batteries, improve the energy density and cycle life of batteries, reduce the risk of pinholes and breakage, and improve the safety and performance consistency of batteries.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

本发明公开了一种铸轧8006合金制备高强高韧超薄动力电池用铝箔的方法，属于铝合金材料技术领域。该方法以质量百分比20%～30%的重熔用铝锭和70%～80%的8021合金铸轧卷废料为原料，加入陶瓷铝晶种，调整合金成分至Si 0.2%～0.3%，Fe 1.2%～1.4%，Cu 0.05%～0.07%，Mn 0.3%～0.5%，Mg≤0.02%，Zn≤0.05%，Ti 0.01%～0.02%，余量为Al；经熔炼、加入铝钛碳和铝钛硼晶粒细化剂、除气、双级过滤、管式过滤箱过滤后，采用电磁能铸造结晶器进行铸造，再经高温再结晶退火、冷轧、纵剪切边、箔轧、检验包装，得到成品铝箔。本发明制备的铝箔厚度达0.008mm，抗拉强度≥310MPa，屈服强度≥280MPa，延伸率≥4.0%，具有高强度、高延伸率、低针孔率、低带油量等优点。
Need to check novelty before this filing date? Find Prior Art