Calendering Roll Oil Path Layout for Dry Electrode Rigidity
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Solution Overview
Problem
The calendering rolls in dry electrode manufacturing processes experience deformation deviations due to static pressure, leading to defects in the dry electrode sheets, and existing solutions complicate the equipment configuration and increase costs.
Innovation Solution
The calendering roll design features oil paths that are widest at the sides and narrowest at the center, allowing for increased bending rigidity by optimizing the oil path intervals relative to the roll driving shafts, thereby reducing deformation and preventing buckling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the calendering roll uses a conventional oil path design, then the equipment configuration remains simple, but the bending rigidity is insufficient causing deformation deviation under static pressure
Solution Approach 1:
The oil path interval is designed to be non-uniform, specifically widest at the sides and narrowest at the center of the calendering roll. This local variation in oil path configuration optimizes the distribution of oil pressure to enhance bending rigidity where needed (at the sides) while maintaining structural integrity (at the center), resolving the contradiction between simplicity and performance.
2Manufacturing precision
If the calendering roll is designed with uniform oil path intervals, then the manufacturing process is simple, but deformation deviation occurs under static pressure leading to dry electrode sheet defects
Solution Approach 1:
The oil path interval is deliberately made asymmetric with respect to position - widest at the sides and narrowest at the center - rather than uniform throughout. This asymmetric design compensates for the non-uniform stress distribution under static pressure, preventing deformation deviation and improving manufacturing precision of the dry electrode sheet.
3Reliability
If the calendering roll uses standard oil path spacing, then the structural design remains simple, but buckling occurs under repeated static pressure application
Solution Approach 1:
The oil path interval parameter is changed from a uniform value to a position-dependent value that varies across the calendering roll width. By making the oil path spacing a variable parameter (widest at sides, narrowest at center) rather than a constant, the structure gains enhanced resistance to buckling under repeated static pressure while maintaining reasonable design simplicity.
Data Source
AI summary
A calendering roll of a calendering roll press for manufacturing a dry electrode disposed as a pair to press and elongate an electrode sheet in both directions includes: a cylindrical roll main body installed to extend in a width direction of the electrode sheet; a roll driving shaft installed to pass through a center portion of the roll main body in a longitudinal direction; and a plurality of oil paths formed outside the roll driving shaft to form a flow path through which oil flows, and formed to pass through the roll main body in the longitudinal direction. An interval between the oil path and the roll driving shaft is formed to be largest at both sides of the roll main body in the longitudinal direction, and is formed to be smallest at the center portion of the roll main body.