公开(公告)号：US20250096226A1

公开(公告)日：2025-03-20

申请号：US18469759

申请日：2023-09-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Daniel Ryan ,  Xiaosong Huang ,  Joel G. Toner ,  Anil K. Sachdev ,  Nicole Ellison

IPC: H01M4/04 ,  H01M4/02

Abstract: Aspects of the disclosure include a roll press design for manufacturing tailored porosity electrodes. An exemplary roll press includes a top roller and a bottom roller separated from the top roller by a gap. At least one of the top roller and the bottom roller includes a raised region and an indented region. The raised region includes a first radius and the indented region includes a second radius less than the first radius. The gap includes a distance selected to accommodate a current collector. The current collector includes a bare portion and a coated portion having thereon an electrode material of a first thickness. A difference between the first radius and the second radius is selected, based on the first thickness, to evenly distribute stress across the bare portion and the coated portion of the current collector during a calendering process for forming a tailored porosity electrode.

公开(公告)号：US20250096225A1

公开(公告)日：2025-03-20

申请号：US18469720

申请日：2023-09-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Nicole Ellison ,  Joel G. Toner ,  Xiaosong Huang ,  Daniel Ryan

IPC: H01M4/04

Abstract: Aspects of the disclosure include an electrode calendering system for manufacturing electrodes with enhanced edge quality. An exemplary system includes an active material supply including an electrode material and a coating roll coupled to the active material supply. The coating roll is positioned to coat a current collector with the electrode material. A back roll is positioned to transfer the current collector to the coating roll. The system includes at least one of a bare foil supporting material roll and a coated foil supporting material roll. The bare foil supporting material roll is positioned to apply a support material onto a first portion of the current collector prior to the current collector being coated with the electrode material. The coated foil supporting material roll is positioned to apply the support material onto the first portion of the current collector after the current collector is coated with the electrode material.