You might have more luck leaving out "volt" and including "chev" (because people use "Chevrolet", "Chevy", or just "Chev" in the name). Still, it's a challenge. 
I would suggest using the standard term "module" for a group of cells; "pack" is usually the whole battery, or the entire portion contained within one outer housing.
Also, the first-generation Chevrolet Volt modules have 6 or 12 cells in series, for a nominal 22.5 V or 45 V... not quite 24 V and 48 V.
I would suggest using the standard term "module" for a group of cells; "pack" is usually the whole battery, or the entire portion contained within one outer housing.
Also, the first-generation Chevrolet Volt modules have 6 or 12 cells in series, for a nominal 22.5 V or 45 V... not quite 24 V and 48 V.