Battery case for electric vehicle and manufacturing method thereof

Abstract

The invention discloses a battery box of an electric vehicle and a manufacturing method thereof. The battery box includes a frame and a bottom plate fixed on the frame. The battery box is an integral molding. The manufacturing method includes the following steps: using cast aluminum 102 as The casting raw material of the battery box is formed by gravity casting; the battery box is clamped in the CNC machine tool, the mounting surface is processed, drilled and tapped; the shape of the battery box is corrected; through electrophoresis Processing Surface treatment and coating of the battery case. Its beneficial effects are: using cast aluminum 102 as the raw material to cast the battery box as a whole, which not only reduces its weight significantly, but also helps to improve its integrity, water resistance, impact resistance and yield resistance, processing accuracy and product batch Compared with traditional manufacturing methods, the consistency is much higher, which is convenient for future interchange with vehicle installation and maintenance; the simplified process can also greatly reduce costs.

Description

technical field [0001] The invention relates to the field of electric vehicle manufacturing, in particular to a battery box of an electric vehicle and a manufacturing method thereof. Background technique [0002] With the development of the economy, people's concept of environmental protection has gradually improved, and energy conservation and emission reduction have become a social consensus. With the widespread use of pure electric vehicles with outstanding environmental protection characteristics, the processing of battery boxes for electric vehicles has also become a technical difficulty that the industry urgently needs to overcome. The pure electric vehicle battery box, in addition to containing all the batteries and management systems, must also bear the weight of the battery box itself and the vibration of the car at high speed and the impact of foreign objects such as sand and gravel. At the same time, it replaces the chassis of traditional electric vehicles. The b...

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Problems solved by technology

[0003] In the prior art, battery boxes are all processed by sheet metal or stamping. Such battery boxes generally have defects such as heavy weight, complicated processing technology, unguaranteed accuracy, poor consistency, long production cycle, poor strength, and poor sealing. These defects cause great inconvenience to the manufacture of products, and at the same time cause hidden dangers to the safety performance of pure electric vehicles.

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