Punching method of new energy vehicle battery aluminum box

Abstract

The invention relates to a punching method of a new energy vehicle battery aluminum box. The punching method includes the following steps that firstly, material selection is conducted, wherein an Al-Fe series aluminum alloy plate is used as a raw material, the plate elongation is larger than or equal to 35%, the plate width ranges from 800 mm to 900 mm, length ranges from 1000 mm to 1300 mm, and thickness is larger than or equal to 0.6 mm; secondly, film pasting is conducted, wherein the two faces of the aluminum alloy plate are covered with deep-draw protection films correspondingly; thirdly,chamfering is conducted, wherein the four corners of the aluminum alloy plate covered with the films are chamfered to form 1 / 4 circles correspondingly; fourthly, placement on a die is conducted, wherein the chamfered aluminum alloy plate is placed on the surface of a male die of the punching die, and stretching oil is sprayed on the four edges of the aluminum alloy plate or the punching die; fifthly, punching is conducted, punching is conducted with a female die of the punching die facing downwards and the male die of the punching die facing upwards, the blank holder force of the aluminum alloy plate ranges from 20 t to 40 t, the punching speed is smaller than or equal to 60 mm / s, and the punching depth is larger than or equal to 100 mm; and sixthly, shaping is conducted, wherein shaping,edge trimming, flanging and assembling are conducted after punching, and finally the new energy vehicle battery aluminum box is formed. The method is simple and convenient, steel is replaced with aluminum, and the aim of decreasing the weight of the battery aluminum box is achieved.

Description

technical field [0001] The invention relates to a punching method of an aluminum box for a battery of a new energy vehicle. Background technique [0002] With the rapid development of new energy vehicles, the demand for battery boxes continues to increase. The battery box includes an upper box cover, a lower box body, a battery module and a heat exchange device, etc. The size of the upper and lower boxes is basically the same, but punching is more difficult due to unfavorable factors such as large size, deep depth, steep slope, small chamfer, and easy cracking. At present, DC06 steel for ultra-low carbon superplastic deep drawing is basically used for punching, which has problems such as heavy weight and easy corrosion. Some manufacturers try to replace steel with aluminum profiles, but the production is complicated, the efficiency is low, and the cost is not advantageous. At the same time, in order to pursue longer cruising range for new energy vehicles, improving battery...

AI Technical Summary

Problems solved by technology

The size of the upper and lower boxes is basically the same, and punching is more difficult due to unfavorable factors such as large size, deep depth, steep slope, small chamfer, and easy cracking

At present, DC06 steel for ultra-low carbon superplastic deep drawing is basically used for punching, which has problems such as heavy weight and easy corrosion. Some manufacturers try to replace steel with aluminum profiles, but the production is complicated, the efficiency is low, and the cost is not advantageous.

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