Aluminum alloy battery box body for new energy automobile and preparation method of aluminum alloy battery box body

Abstract

The invention provides an aluminum alloy battery box body for a new energy automobile and a preparation method of the aluminum alloy battery box body. The aluminum alloy battery box body comprises a plurality of combined box bodies and a box cover, wherein the combined box bodies and the box cover are assembled through the matching of mounting holes in box walls of the combined box bodies and bolts; each combined box body is of a structure which is defined by a bottom plate and a box wall and is provided with an opening at one end, wherein each bottom plate is fixedly provided with a plurality of bottom supporting beams; each box wall comprises a box wall main body and transvers ribs located at the top and bottom of the box wall main body; each box wall main body is of a flat plate structure which is internally provided with a cavity; each cavity is internally provided with a reinforcing rib. The battery box body produced by the method provided by the invention has the advantages of light weight, good sealing performance, excellent heat dissipation effect and high anti-collision impact force.

Description

technical field [0001] The invention belongs to the field of new energy vehicle manufacturing, and in particular relates to an aluminum alloy battery box for a new energy vehicle and a preparation method thereof. Background technique [0002] With the development of new energy electric vehicles, power batteries are the core components of new energy vehicles. environment, the battery box, as the carrier of the power battery, plays a key role in the safe operation and protection of the battery pack. Its safety, reliability and durability are crucial and determine the performance of the vehicle. [0003] In the domestic prior art, the traditional battery case is welded by steel plate and processed by casting aluminum. Steel plate battery boxes generally have defects such as heavy weight, complex processing technology, low thermal conductivity, poor sealing, and low crash strength, which cannot realize the lightweight of the car; and the aluminum casting process is prone to ca...

AI Technical Summary

Problems solved by technology

Steel plate battery boxes generally have defects such as heavy weight, complex processing technology, low thermal conductivity, poor sealing, and low crash strength, which cannot realize the lightweight of the car; and the aluminum casting process is prone to casting defects such as pores and sand holes due to poor casting fluidity , high scrap rate, poor surface roughness and corrosion resistance, not suitable for safety

[0004] Shortcomings of the prior art: 1, the weight of the steel sheet metal box causes the energy efficiency ratio of the battery box to be low; 2, the corrosion resistance of the steel sheet metal box is poor, and the battery box is easy to corrode; 3, the steel sheet metal electric box box The poor sealing performance of the battery case will cause the battery box to be immersed in water and short-circuit the battery; 4. Due to the poor casting fluidity of the cast aluminum process, the thickness of the box wall cannot be designed too thin, so the weight will be heavier compared to extrusion; 5. The mold cost of the cast aluminum process High, high R&D cost and long time; 6. Due to the limitation of the process itself, the casting aluminum process is prone to casting defects such as pores and sand holes

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