Foil blank for new energy battery and preparation method of foil blank

Abstract

The invention provides a foil blank for a new energy battery and a preparation method of the foil blank. The foil blank comprises the following components, by mass, less than or equal to 0.1% of Si, 0.1-0.25% of Fe, 0.03-0.05% of Cu, less than or equal to 0.05% of Mn, less than or equal to 0.05% of Zn, less than or equal to 0.05% of Ti and the balance Al. The preparation method comprises the steps of (1) smelting, (2) turning down, (3) degassing, (4) deslagging, (5) cast rolling, (6) plate shape control and (7) quality inspection. According to the prepared foil blank for the new energy battery, the tensile strength is larger than or equal to 260 MPa, the ductility is larger than 3%, and the number of pinholes is smaller than or equal to 100 / m < 2 >; while the mechanical performance of the blank is guaranteed, the number of pinholes is small, the strip breakage rate is low, the machining performance is excellent, and the quality of a finished product can be remarkably improved; and compared with a traditional hot-rolled material, the production process is short, and the cost is low, so that resources and energy are saved, and the machining efficiency of products is improved.

Description

technical field [0001] The invention relates to an aluminum foil blank and a preparation method thereof, and more particularly to a foil blank used for a new energy battery and a preparation method thereof. Background technique [0002] Aluminum foil is widely used and has penetrated into all walks of life, from household, pharmaceutical, living packaging paper to the electronics industry. In recent years, with the rapid development of industries such as electric vehicles and power tools, the demand for various battery materials has continued to increase, and battery foils have also attracted much attention. Battery foil refers to aluminum foil products used in the production of various batteries. Battery foil is mainly used in electric vehicles, electric bicycles and other fields. Due to the extremely high requirements for battery foils in subsequent processing, battery foils need to have high surface quality, high extension, High tensile strength and other characteristics...

AI Technical Summary

Problems solved by technology

[0003] At present, the defects of battery foil are as follows: the battery foil is delivered to downstream customers. During the production process of power batteries, the main technical problem of battery aluminum foil is broken tape, which greatly reduces the processing efficiency of new energy batteries; The pinhole of aluminum foil exceeds the standard, which also seriously affects the product quality of new energy batteries