A punching method for new energy vehicle battery aluminum box

Abstract

The invention relates to a punching method for a new energy vehicle battery aluminum box, the steps are as follows: 1) Material selection: Al-Fe aluminum alloy plate is used as the raw material, the elongation of the plate is ≥ 35%, the plate width is 800-900mm, and the length is 1000- 1300mm, thickness ≥ 0.6mm; 2) Laminating film: Cover both sides of the aluminum alloy plate with deep-drawn protective film; 3) Chamfering: Invert the four corners of the coated aluminum alloy plate by 1 / 4 circle; 4) Upper die: place the rounded aluminum alloy plate on the punch surface of the stamping die, and spray stretching oil on the four sides of the aluminum alloy plate or the stamping die; 5) Stamping: make the die of the stamping die face down, The punch is punched upwards, the blank-holding force on the aluminum alloy plate is 20-40t, the punching speed is ≤60mm / s, and the punching depth is ≥100mm; 6) Shaping: after punching, carry out shaping, trimming, and flanging And assembly, and finally form the new energy vehicle battery aluminum box. The method is simple, realizes replacing steel with aluminum, and makes the battery aluminum box achieve the purpose of lightening.

Description

technical field [0001] The invention relates to a punching method for an aluminum case 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. The dimensions of the upper and lower boxes are basically the same, but due to unfavorable factors such as large size, deep depth, steep slope, small chamfer, and easy cracking, punching is more difficult. At present, ultra-low carbon and superplastic deep-drawing DC06 steel is basically used for punching, but there are 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 and improve battery energy densit...

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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