公开(公告)号：US20250167365A1

公开(公告)日：2025-05-22

申请号：US18514429

申请日：2023-11-20

Applicant: GM Global Technology Operations LLC

Inventor： Nikhil Mone ,  Srikant Karunakaran Nambiar ,  Umamaheswari Viswanathan ,  Subrahmanyam Goriparti ,  Raghavendra Keerthi Manda ,  Suryanarayana Kolluri

IPC: H01M50/242 ,  H01M50/249

Abstract: A battery cell includes a cell can having a base, a plurality of side walls connected to the base, the base and the plurality of side walls defining a cell stack receiving zone. A battery cell stack arranged in the battery stack receiving zone. A resilient expansion limiter is arranged at one of the plurality of side walls in the cell stack receiving zone. The resilient expansion limiter controlling expansion of the battery cell stack.

公开(公告)号：US20250125510A1

公开(公告)日：2025-04-17

申请号：US18485493

申请日：2023-10-12

Applicant: GM Global Technology Operations LLC

Inventor： Subrahmanyam Goriparti ,  Raghavendra Keerthi Manda

IPC: H01M50/645 ,  H01M50/103 ,  H01M50/184 ,  H01M50/186 ,  H01M50/193 ,  H01M50/325

Abstract: A prismatic battery cell has a cell case, an electrolyte, and a sealing member. The cell case has an interior cavity and a fill port. The fill port has an inner surface. The fill port is in fluid communication with an ambient environment and the interior cavity. The electrolyte is disposed in the interior cavity through a one-way valve in the sealing member. The sealing member is disposed in the fill port. The sealing member has an exterior sealing surface that forms a fluid seal with the inner surface of the fill port. The sealing member has a valve formed therein. The valve has an open position for allowing the electrolyte to enter the interior cavity and a closed position to prevent the electrolyte from exiting the interior cavity. Moreover, the valve allows for degassing of the battery cell after the formation process.

公开(公告)号：US20250132470A1

公开(公告)日：2025-04-24

申请号：US18490179

申请日：2023-10-19

Applicant: GM Global Technology Operations LLC

Inventor： Stephanie Girges ,  Wai Ping Gloria Tam ,  David F. Titmuss ,  Daniel Gerardo Gonzalez ,  Christopher D. James Megdanoff ,  Teresa J. Rinker ,  Jared Matthew Satkowiak ,  Raghavendra Keerthi Manda

IPC: H01M50/54 ,  H01M4/66 ,  H01M50/533 ,  H01M50/534 ,  H01M50/536

Abstract: A battery cell stack assembly for a prismatic battery includes a plurality of monocells and two current collector bracket assemblies. Each monocell includes an anode electrode sheet having an outer perimeter and an anode cell tab and a cathode electrode sheet having a cathode cell tab. One of the current collector bracket assemblies electrically connect each of the anode cell tabs with one another and a remaining current collector bracket assembly electrically connects each of the cathode cell tabs with one another, and each current collect bracket assembly includes at least one arm that is positioned to electrically connect either two or more of the anode cell tabs or two or more of the cathode cell tabs to one another.

公开(公告)号：US20250141037A1

公开(公告)日：2025-05-01

申请号：US18499622

申请日：2023-11-01

Applicant: GM Global Technology Operations LLC

Inventor： Hwanchul Kim ,  Raghavendra Keerthi Manda ,  Subrahmanyam Goriparti ,  Vincent Edward Herrman ,  Fengkun Wang

IPC: H01M50/367 ,  B60L50/50 ,  H01M50/209 ,  H01M50/249 ,  H01M50/289

Abstract: A battery cell includes a gas flow vent system including a cell can having a plurality of walls that define a cell stack receiving zone. The plurality of walls include a vent surface including a vent opening and a gas flow guide surface. A cell stack is arranged in the cell stack receiving zone. A spacer is arranged in the cell stack receiving zone adjacent the gas flow guide surface. The spacer includes a first surface facing the cell stack and a second surface spaced from the gas flow guide surface so as to define a gas flow duct that channels gases from the cell stack to the vent opening.

公开(公告)号：US20250140781A1

公开(公告)日：2025-05-01

申请号：US18494853

申请日：2023-10-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Raghavendra Keerthi Manda

IPC: H01M4/04

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.