Cylindrical lithium ion power battery shell and manufacturing method thereof

Abstract

The invention discloses a cylindrical lithium ion power battery shell and a manufacturing method thereof, and aims to provide the cylindrical lithium ion power battery shell and the manufacturing method which have good safety performance and have the advantage that the waste battery shell does not cause serious environmental pollution after the produced battery is discarded. In the technical scheme, the manufacturing method comprises the steps of (A) pressing a metal plate with a thickness of 1-5 mm into a cylindrical outer-layer shell; (B) cutting the metal plate with the thickness of 0.1-0.5mm into the required size, pressing 2-4 Z-shaped folding parts with a width of 1-5 mm, rolling or welding a seam to prepare the cylindrical inner-layer shell; (C) pressing the metal plate with a thickness of 0.1-0.5 mm into S-shaped connecting parts, wherein one ends of the 2-4 S-shaped connecting parts are bonded to an outer side of the inner-layer shell by using a conductive adhesive; (D) welding the bottom edge of the inner-layer shell to the bottom of the outer-layer shell, wherein the other ends of the S-shaped connecting parts in the step (3) are bonded to an inner side of the outer-layer shell by using the conductive adhesive; and (E) injecting a foam filling layer between the inner-layer shell and the outer-layer shell. The cylindrical lithium ion power battery shell and the manufacturing method thereof belong to the technical field of chemical power supply.

Description

technical field [0001] The invention relates to a method for manufacturing a battery case, in particular to a method for manufacturing a cylindrical lithium-ion power battery case, and belongs to the technical field of chemical power sources. Background technique [0002] With the development and application of new energy technologies, especially the widespread promotion and application of all-electric vehicles and hybrid vehicles, the safety of lithium-ion power batteries has become an important issue for the whole society, especially for new energy vehicle manufacturers and new energy vehicles. One of the important hotspots of concern to readers. [0003] As we all know, the safety essence of lithium-ion batteries is determined by the characteristics of the existing lithium-ion generation raw materials, mainly due to the oxygen released by the decomposition of the positive active material of lithium-ion batteries and the flammable electrolyte, followed by the structure of ...

AI Technical Summary

Problems solved by technology

There are significant deficiencies in these two structures of lithium-ion power batteries: First, because the battery case is made of single-layer stainless steel, the mechanical strength is low, and it is easy to be inflated and deformed, squeezed and deformed, or even explode in extreme cases. Safety accidents; second, the hard plastic battery case has poor thermal conductivity and little room fo...

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