Electrode foil wrinkle remover band
AssigneeGM Global Technology Operations LLC
InventorRaghavendra Keerthi Manda
Life of this patent
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Abstract
Aspects of the disclosure include an electrode calendering system having an electrode foil wrinkle remover band and a process for manufacturing electrodes using the same. An exemplary system includes a top roll press and a bottom roll press separated from the top roll press by a gap. The gap includes a distance selected to accommodate a current collector having a bare portion and a coated portion having thereon an active electrode material of a first thickness. The system further includes a wrinkle remover band having a second thickness 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 pressed electrode.
Claims15
A system for manufacturing electrodes, the system comprising:
- a top roll press;
- a bottom roll press separated from the top roll press by a gap, the gap comprising a distance selected to accommodate a current collector, the current collector comprising a bare portion and a coated portion having thereon an active electrode material of a first thickness;
- and
- a wrinkle remover band comprising a second thickness 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 pressed electrode;
- wherein the second thickness of the wrinkle remover band is tapered;
- wherein the wrinkle remover band is positioned over a top surface of the bare portion of the current collector and the second thickness of the wrinkle remover band comprises a positive taper that increases towards an edge of the current collector.
A system for manufacturing electrodes, the system comprising:
- a top roll press;
- a bottom roll press separated from the top roll press by a gap, the gap comprising a distance selected to accommodate a current collector, the current collector comprising a bare portion and a coated portion having thereon an active electrode material of a first thickness;
- and
- a wrinkle remover band comprising a second thickness 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 pressed electrode;
- wherein the second thickness of the wrinkle remover band is tapered;
- wherein the wrinkle remover band is positioned over a bottom surface of the bare portion of the current collector and the second thickness of the wrinkle remover band comprises a positive taper that increases towards an edge of the current collector.
A method comprising:
- providing a top roll press;
- providing a bottom roll press separated from the top roll press by a gap, the gap comprising a distance selected to accommodate a current collector, the current collector comprising a bare portion and a coated portion having thereon an active electrode material of a first thickness;
- and
- providing a wrinkle remover band comprising a second thickness 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 pressed electrode;
- wherein the second thickness of the wrinkle remover band is tapered;
- wherein the wrinkle remover band is positioned over a top surface of the bare portion of the current collector and the second thickness of the wrinkle remover band comprises a positive taper that increases towards an edge of the current collector.
Dependencies are inferred from the claim text.