Electrode foils for vehicle batteries
AssigneeGM Global Technology Operations LLC
InventorsHui-ping WANG, Hui WANG, Masound MOHAMMADPOUR, Lu HUANG, Jing GAO, Brian J. KOCH
Life of this patent
Estimating the term…
Abstract
A vehicle battery includes a pouch cell configured to provide power to at least one power system of a vehicle, and multiple electrode foils stacked together at least partially within the pouch cell. Each of the multiple electrode foils includes a foil extension at an end of the electrode foil, a first group of foil extensions are connected together via a first ultrasonic weld to define a first foil extension weld portion, and a second group of foil extensions are connected together via a second ultrasonic weld to define a second foil extension weld portion.
Claims20
A vehicle battery comprising:
- a pouch cell configured to provide power to at least one power system of a vehicle;
- and
- multiple electrode foils stacked together at least partially within the pouch cell, wherein:
- each of the multiple electrode foils includes a foil extension at an end of the electrode foil;
- a first group of foil extensions are connected together via a first ultrasonic weld to define a first foil extension weld portion;
- and
- a second group of foil extensions are connected together via a second ultrasonic weld to define a second foil extension weld portion.
A method of manufacturing a vehicle battery, the method comprising:
- stacking multiple electrode foils together, each electrode foil configured to operate as a current collector of a vehicle battery;
- inserting a stack of the multiple electrode foils at least partially within a pouch cell, each of the multiple electrode foils including a foil extension at an end of the electrode foil;
- pressing the foil extensions to define a wrinkle pattern in each foil extension, the wrinkle pattern including multiple wave oscillations of a surface of the foil extension;
- performing a first ultrasonic weld on a first group of foil extensions to define a first foil extension weld portion;
- and
- performing a second ultrasonic weld on a second group of foil extensions to define a second foil extension weld portion.
A method of manufacturing a vehicle battery, the method comprising:
- stacking multiple electrode foils together, each electrode foil configured to operate as a current collector of a vehicle battery;
- inserting a stack of the multiple electrode foils at least partially within a pouch cell, each of the multiple electrode foils including a foil extension at an end of the electrode foil;
- curling a portion of a lead tab around a curved surface of a clamp, the lead tab configured to electrically connect the electrode foils with at least one power system of a vehicle via the bus bar;
- fusion welding the lead tab to the bus bar while the lead tab is curled around at least a portion of the clamp;
- and
- removing the clamp after fusion welding the lead tab to the bus bar, to relieve tension in the foil extensions.
Dependencies are inferred from the claim text.