A kind of composite material battery box manufacturing process

Abstract

The invention relates to a manufacturing process of a composite material battery box, comprising the following steps: manufacturing a battery box skeleton, the battery box skeleton includes flanges around it, and the inner side of the flange is connected with a facade R through a flange R corner with a gradual thickness corner parts; sandblast the battery box skeleton, then clean and dry it for use; prepare a paving jig; lay a large fabric on the paving jig, then put the battery box skeleton into the paving jig and Press tightly; lay the remaining large fabric on the battery box skeleton, and press it again to form a battery box preform; transfer the paving jig with the paved material to low temperature refrigeration for 2~15min; complete the preform Demoulding, and quickly placing it into the high-temperature product mold to solidify the product; after the mold is opened, the final battery box is obtained after post-processing. The process is not limited by the size of the battery box product, has high feasibility, strong versatility, and high production efficiency;

Description

technical field [0001] The invention relates to a manufacturing process of a composite material battery box. Background technique [0002] The battery box is the outer cover of the new energy vehicle power battery pack. It plays a waterproof, dustproof, support and insulation protection function for the cells and accessory systems in the battery pack. It is one of the important parts of the new energy vehicle. [0003] At present, new energy battery boxes are mainly divided into steel components (sheet metal parts), aluminum alloy parts and polymer composite materials due to different needs. Among them, polymer composite components are favored by the new energy vehicle market due to their advantages of light weight and high strength, large freedom of structural design, simple and efficient molding process, and excellent shock absorption effect. [0004] PCM (Prepreg Compression Molding), namely (polymer composite material) prepreg molding process. Due to the use of continu...

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Problems solved by technology

[0013] However, from the content disclosed in this patent, it can be known that: (1) Compared with the "preform direct transfer molding method", the material is directly in contact with the upper and lower high-temperature molds, and the metal bushing method has a metal bushing interlayer. The heating efficiency of the material during the molding process is lower; (2) Although the metal bushing greatly reduces the weight of the male mold, the metal bushing itself still has a certain weight, so it is necessary to use a mechanical arm to transfer it in and out of the mold

When the size of the battery box (battery case) product increases, the size and weight of the metal bushing will increase, and may exceed the handling weight and load range of automation equipment such as robotic arms, thus restricting the metal bushing forming method Application in the production of large-size battery box products

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