Machining technology method of magnesium alloy battery shell

Abstract

The invention provides a machining technology method of a magnesium alloy battery shell. The method comprises the following steps that, a Zn ingot, an Al ingot, an Mn ingot, an RE ingot, Zr powder and the balance of Mg ingot are mixed and fused, different machining is carried out according to the thickness of the battery shell, magnesium alloy melt in the step 3 is poured into a metal mold when the thickness of the shell of the battery shell is less than 1mm, a required casting is cast and formed by adopting a metal hot mold die-casting forming process, and when the thickness size of the battery shell is larger than 1 mm, and when the magnesium alloy melt in the step 3 is in a molten state, the battery shell is formed and machined by adopting semi-solid injection forming of a cold chamber die-casting method. According to the method, the defects in the prior art are overcome, the design is reasonable, the structure is compact, the performance of the battery shell is improved through the combination of various metals, and meanwhile, different machining technologies are adopted for shells with different thicknesses, so that the machining efficiency is greatly improved, the product quality is improved, and the practicability is very high.

Description

technical field [0001] The invention relates to the technical field of battery casing processing, in particular to a processing method for a magnesium alloy battery casing. Background technique [0002] At present, large-capacity lithium-ion secondary batteries are widely used in new energy vehicles, grid energy storage and other fields due to their high energy density, high safety and stable cycle performance, among which the capacity of a single cell can reach more than 230Ah. In the case of such a high-capacity cell, due to the consideration of battery heat dissipation characteristics, the thickness of the single battery is limited, so the volume and weight of the external battery case will increase accordingly. Therefore, the traditional battery case can no longer meet the market demand. [0003] To this end, we propose a processing method for magnesium alloy battery case. Contents of the invention [0004] The purpose of the present invention is to solve or at least ...

AI Technical Summary

Problems solved by technology

In the case of such a high-capacity battery, due to the consideration of the battery heat dissipation characteristics, the thickness of the single battery is limited, so the volume and weight of the external battery case will increase accordingly, so the traditional battery case can no longer meet the market demand.