Induction-Heated Rolling Roll for Wrinkle-Free Electrode Calendering
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Solution Overview
Problem
The rolling process of electrode sheets at high pressure leads to severe wrinkling or ruptures in the uncoated portions, which is a challenge in increasing the loading amount of electrode active materials without increasing the electrode volume.
Innovation Solution
A rolling roll with an induction heating mechanism that applies heat to the uncoated portions of the electrode sheet during the rolling process, using an induction heating roll and a pair of roll members to prevent wrinkling by forced stretching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high pressure rolling is applied to increase electrode density and reduce volume, then the loading amount of electrode active material can be increased, but the uncoated portion of the electrode sheet develops severe wrinkles or ruptures
Solution Approach 1:
The patent applies local heating to the uncoated portion of the electrode sheet before rolling, changing the temperature parameter of the material. This thermal treatment modifies the mechanical properties of the uncoated portion, making it more flexible and resistant to wrinkling and rupture during high-pressure rolling, thus resolving the contradiction between achieving high electrode density and maintaining the integrity of the uncoated portion
Solution Approach 2:
The patent performs preliminary heating of the uncoated portion before the rolling process. This preliminary thermal treatment prepares the material by increasing its ductility and reducing its stiffness, so that when high pressure is subsequently applied during rolling, the uncoated portion can deform without developing wrinkles or ruptures, thereby maintaining structural integrity while achieving the desired density increase
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents wrinkling of the uncoated portions by applying heat, allowing for effective rolling without damage, thus maintaining the integrity of the electrode sheet.
Implementation Method 1
an induction coil provided to be inductively heated upon rotation of the rotating shaft
Implementation Method 2
an induction coil provided to generate heat upon alternate current application
Implementation Method 3
the main body of the induction heating roll has a heating roll surface which is heated by heat transferred from the induction coil. The heat may be transferred to the outside through the heating roll surface
Data Source
AI summary
The present invention relates to a rolling roll and an electrode rolling device comprising the same. The rolling roll according to one example of the present invention comprises a rotating shaft, a pair of roll members mounted apart from each other at a predetermined interval on the rotating shaft, and an induction heating roll disposed between the pair of roll members, mounted on the rotation shaft, and including an induction coil provided to be inductively heated upon rotation of the rotating shaft, and a main body surrounding the induction coil.