Battery Can Crimping Jigs for High-Capacity Cylindrical Cells

The patent divides the shaping force application into multiple segments by using a plurality of jigs (at least three, preferably four or more) distributed around the can. Each jig applies force to a specific sector, segmenting the total shaping load. This segmentation allows the battery to be shaped with larger diameter and thickness without concentrating excessive force on a single point, preventing jig damage while achieving high capacity.

The patent introduces a radial dimension to force distribution by arranging multiple jigs circumferentially around the can at different angular positions. Instead of applying shaping force from a single direction, the force is distributed across multiple radial directions, creating a balanced three-dimensional shaping process that handles thick-walled, high-capacity batteries effectively.

The shaping process is segmented into multiple independent contact points around the can circumference. Each jig independently supports and shapes a portion of the can, distributing the mechanical stress. This prevents any single jig from bearing excessive load that could cause damage to either the jig or the battery, thereby maintaining reliability for high-capacity, thick-walled batteries.

The patent changes the geometric parameters of the jigs, specifically designing support tips with optimized curvature radii and contact surface areas. The support tip curvature radius is set to be 0.5mm to 2mm, and the contact surface area is optimized to distribute pressure evenly. These parameter changes allow the jigs to effectively shape thick-walled cans without concentrating stress, preventing damage and maintaining battery quality.

The shaping apparatus is segmented into multiple identical or symmetric jigs, each performing the same shaping function on a different sector of the can. This modular segmentation maintains process simplicity while improving precision, as each jig can be independently optimized and replaced if needed, ensuring consistent appearance quality for high-capacity batteries.

The patent optimizes specific geometric parameters of the jigs, including the support tip curvature radius (0.5mm to 2mm) and the contact surface area, to achieve precise shaping of the can's outer peripheral surface. These parameter changes enable high manufacturing precision for battery appearance while keeping the overall shaping process relatively simple through standardized jig design.