how to find the battery model for macbook pro 13-inch, 2017

Apple does not sell replacement batteries for end-user installation, and most aftermarket batteries are not very good.

The battery is glued in place and requires toxic and highly flammable solvents to remoce, with risk of fatal damge to the logic board.

Have Apple to the work for you. Their charge includes parts and labor. This page give you a cost estimator:

Mac Repair & Service - Apple Support

It looks like US$199.

Some independent service providers are charging close to US$500 to do the job because they don't know how to deal with the solvent issue, and simply replace other perfectly good like the deck, keyboard and trackpad.