Preparing method for battery box cover

Abstract

The invention provides a preparing method for a battery box cover. The preparing method comprises the following steps that firstly, continuous fiber reinforced thermosetting resin prepreg and SMC sheets are provided; secondly, a prepreg layer, an SMC layer and a prepreg layer are sequentially laid on a die core, and a prefabricated body is obtained; thirdly, the die core and the prefabricated bodyare placed in vacuum pumping equipment together, and vacuum pumping pre-compacting is conducted; fourthly, the die core and the pre-compacted prefabricated body are arranged on a preheated male die,and die assembly and curing are conducted; and fifthly, after curing sizing, the die core and a cured and formed product are taken out of the die, a sizing tool is adopted for pressing the product, and cooling is conducted. The battery box cover obtained through the preparing method can meet the high mechanical performance requirement for the box cover, and meanwhile the product appearance and airtightness are optimized. Compared with a traditional box cover, the mechanical performance, impact resistance, burning resistance and other performance of the battery box cover are improved, meanwhile, through the preparing method, the material cost is further reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method for preparing a battery case cover. Background technique [0002] With the continuous development of new energy electric vehicles, the energy density of batteries and the cruising range of electric vehicles have always been important factors restricting their rapid promotion. Therefore, the lightweight of power batteries and automobile bodies has also received extensive attention in the industry. As an important part of the power battery pack, the battery box is also constantly developing and updating in terms of materials and processes. [0003] At present, the existing metal battery boxes such as stainless steel and light aluminum alloy also have many shortcomings, the most notable ones are low fire resistance, poor corrosion resistance, heavy weight, and no insulation. Therefore, in view of the above problems, it is necessary to propose a further solution. ...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing metal battery boxes such as stainless steel and light aluminum alloy also have many shortcomings, the most notable ones are low fire resistance, poor corrosion resistance, heavy weight, no insulation, etc.

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