Stamping die for bottom plate of battery chamber

Abstract

The invention discloses a stamping die for a bottom plate of a battery chamber. The stamping die comprises an upper die unit, a lower die unit and a lower die unit driving device; the upper die unit comprises an upper die supporting base; at least two upper die bumps are installed at the bottom end of the upper die supporting base; the area between every two adjacent upper die bumps is an inward-concave reserved area; the upper die supporting base comprises a hollow upper die mounting chamber; the part, positioned in the inward-concave reserved area, of the bottom end of the upper die supporting base is provided with a plurality of upper die reserved openings which are arranged at intervals and communicate with the upper die mounting chamber; the plurality of upper die reserved openings are arranged on the upper die supporting base from front to back; an inward-concave reserved assembly corresponding to the inward-concave reserved area is further installed on the upper die supporting base; the inward-concave reserved assembly further comprises a height locking assembly capable of locking the height position of a plurality of reserved ejector rods. Compared with a traditional die, the stamping die disclosed by the invention is designed with the inward-concave reserved assembly; the inward-concave reserved assembly can be used for reserving enough to-be-stamped materials for a concave-convex structure of the bottom plate in advance so as to reduce tensile deformation of plates in a reinforcing rib area, thus increasing the strength of the bottom plate.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicle power, and in particular relates to a stamping die for a bottom plate of a battery compartment. Background technique [0002] The battery compartment is mainly responsible for carrying and protecting the battery module, circuit equipment and electronic accessories. It is usually composed of three parts: the upper case assembly, the sealing system and the lower case assembly. In order to meet the requirements of high safety and high reliability, the battery compartment should have strong impact resistance, anti-collision and anti-extrusion performance; at the same time, in order to increase the cruising range, the battery compartment should also meet the requirements of lightweight design. The lower shell assembly, as the main bearing part, can be made by sheet metal welding, and the bottom plate of the lower shell assembly can be stamped from sheet metal. [0003] In practical applicat...

AI Technical Summary

Problems solved by technology

[0004] When the existing stamping device is applied to the bottom plate of the battery compartment, the following problems will occur: 1. Since there is no auxiliary structure for the reserved concave area, when stamping the rib area, it is very easy to cause the plate to be stretched and deformed to adapt to the concave-convex structure , in this way, the deformed and thinned plate will instead affect the stiffness of the bottom plate, which in turn will affect the impact resistance, collision resistance and extrusion resistance of the battery compartment

2. When the forming position of the reinforcing rib is deep or narrow, the semi-finished bottom plate is easily stuck on the mold and it is difficult to remove the mold

3. In order to facilitate welding or connection, the bottom plate usually has a hemming design, and the existing stamping device cannot simultaneously perform the forming operations of stamping and hemming

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