Manufacture process of automobile power battery enclosure

Abstract

The invention provides a manufacture process of an automobile power battery enclosure, which comprises the following main steps of: (1) manufacturing aluminum alloy for the automobile power battery enclosure, wherein the aluminum alloy comprises the following components by weight percent: 0.10%<Si<0.60%, 0.40%<Fe<0.70%, 0.05%<Cu<0.20%, Mg<0.05%, 1.05%<Mn<1.25%, 0.15%<RE<0.40%, and 0.05<Ti<0.1, each of other elements is at most 0.05%, the total content of other elements is at most 0.15%, and the balance is aluminum; and (2) smelting the aluminum alloy proportioned by the step (1), casting the smelted aluminum alloy into a billet, and then sequentially carrying out four processes of homogenization, hot extrusion, heat treatment as well as punching and drawing on the billet to manufacture the automobile power battery enclosure. The automobile power battery enclosure manufactured through the process has excellent corrosion resistance, favorable high temperature creep property, and excellent punching-ironing processability and laser welding property, and is suitable for a square-shaped or box-shaped lithium ion battery case.

Description

technical field [0001] The invention relates to the technical field of battery casing manufacturing technology, in particular to a manufacturing technology of an automobile power battery casing. Background technique [0002] Environmental pollution and energy crisis have attracted widespread attention from all over the world. At present, automobiles consume about 45% of crude oil production and release a large amount of greenhouse gas CO2. Automobile exhaust also contains other polluting gases such as SO2 and NOX. The development of electric vehicles (EV) has become an urgent task recognized by all countries in the world. Many automobile manufacturers, battery manufacturers, chemical reagent companies and the governments of various countries have invested a lot of money and manpower to accelerate the research and development of EVs. [0003] Among the currently used batteries, lithium-ion batteries have high capacity density and energy density, and are recognized as the mos...

AI Technical Summary

Problems solved by technology

Compared with stainless steel, aluminum alloy has better mechanical properties such as ductility, and it is easier to process a flat square container with one end and the bottom through deep drawing deformation. More importantly, it is light in weight, good in corrosion resistance, suitable in strength, With the characteristics of high heat dissipation, recycling performance, and good explosion-proof performance, all relevant scientific research units and production companies are rushing to research and produce aluminum alloy battery casings. Due to the lack of production experience and technology, a complete aluminum alloy battery casing has been produced. Not only does it require a lot of equipment and manpower, but the output is also limited

There are many punching processes, and the punching, thinning and deep-drawing process is complicated, and the performance of stamping and thinning and deep-drawing is related to the material performance and forming process. The performance of the material is one of the very important factors for the success of the deformation. one