Abstract: A traction battery pack operating method includes charging a traction battery pack of an electrified vehicle. The charging includes charging a first subpack of battery cells together with a second subpack of battery cells. The method can discharge the first subpack separately from the second subpack. The method can include during the discharging, maintaining at least one switch in an open state to electrically isolate the first subpack from the second subpack.

Abstract: A traction battery assembly includes a plurality of battery cells disposed along an array axis, a rounded endplate at an axial end of the plurality of battery cells, and a wrap spanning the rounded endplate. A method of securing a battery array includes positioning a plurality of battery cells between along an array axis between a first rounded endplate and a second rounded endplate, and compressing the plurality of battery cells between the first and second rounded endplates by winding a wrap around the first rounded endplate, the plurality of battery cells, and the second rounded endplate.

Abstract: An electrochemical assembly is comprised of dry electrochemical powder layers (e.g., anode layer, separator layer, cathode layer, and/or current collector layer) that are substantially free of solvent and/or binder. The electrochemical assembly is produced by directly disposing (e.g., printing/spraying) dry powder layers into a non-conductive frame.

Abstract: According to one or more embodiments, a lithium-ion battery includes an anode including lithium titanate (LTO) particles and solid electrolyte particles configured to form an interphase layer therebetween, a cathode including an active material, electronic conductor, and a non-solid electrolyte; and an ionically conductive and liquid-impermeable solid electrolyte separator. The solid electrolyte separator is in direct contact with and between the anode and cathode, and is configured to prevent reduction of the non-solid electrolyte by isolating the non-solid electrolyte from the LTO particles.

Abstract: According to one or more embodiments, a lithium-ion battery includes an anode including lithium titanate (LTO) particles and solid electrolyte particles configured to form an interphase layer therebetween, a cathode including an active material, electronic conductor, and a non-solid electrolyte; and an ionically conductive and liquid-impermeable solid electrolyte separator. The solid electrolyte separator is in direct contact with and between the anode and cathode, and is configured to prevent reduction of the non-solid electrolyte by isolating the non-solid electrolyte from the LTO particles.