Aluminum battery box body for electric vehicle and manufacturing method of aluminum battery box body

Abstract

The invention discloses an aluminum battery box body for an electric vehicle and a manufacturing method of the aluminum battery box body. A split assembly and combination design is adopted by a battery box body structure, and the battery box body structure comprises a battery box shell, a battery box cover, a suspension scrolling box, brackets, inner brackets and reinforcing rib plates. Through the arrangement of convex ring blocks of the battery box shell, a heat emission hole in a side plate and the inner brackets, the internal heat dissipation effect of the battery box body is improved; through a bracket design of the rib plate structure, the load capacity and the reliability of the battery box body are improved; and a lightweight high-strength improved aluminum alloy is adopted as the material, so that the strength of the plate and the stamping property are improved while the weight of a product is reduced through optimizing aluminum alloy components. A stamping and integral forming structure is adopted by the battery box shell, the battery box cover, the suspension scrolling box and the brackets, so that the problems of multiple casting defects, poor quality, high welding cost, a difficulty in deformation control and the like of the aluminum battery box body in the prior art are solved. The aluminum battery box body has the characteristics of light weight of the product, high overall strength, a good heat dissipation effect, few welding procedures, long service life and the like.

Description

technical field [0001] The invention relates to an electric vehicle battery box, in particular to an electric vehicle aluminum battery box and a manufacturing method thereof. Background technique [0002] The power battery system is a key component of a pure electric vehicle. Its safety, reliability and durability are crucial and determine the performance of the vehicle. The power battery system of pure electric vehicles is mostly arranged under the vehicle body floor, which has a relatively cruel installation environment. The battery box is used as the carrier of the power battery. Vibration in motion and the impact of foreign objects such as sand and gravel, while replacing the chassis of traditional electric vehicles, the battery box needs to be well sealed and waterproof. How to reduce the weight and improve the battery life of the car while ensuring the strength and sealing has become the development direction of the comprehensive performance of the battery box. [00...

AI Technical Summary

Problems solved by technology

[0006] Among them, in terms of overall casting process: since the battery box plate is usually thin, defects such as pores, pinholes, cracks, shrinkage cavities, looseness, deformation, cold shut, and insufficient pouring will inevitably occur during the casting process, resulting in product quality failure rate Low, and at the same time pose a hidden danger to the safety performance of pure electric vehicles

[0007] Among them, the overall welding process: during the welding of aluminum alloy, the temperature of the weld seam and its vicinity is very high. After cooling, the weld seam produces different degrees of shrinkage and internal stress, which causes various deformations of the welded components, resulting in deformation after welding. The battery case cannot install the battery

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