Well, charging the battery increases heat in the battery pack, so overnight charging will help reverse the overnight cooling. In most EVs in the UK this is a good thing because you start the next day with a warmer pack that is holding more charge. If you’re driving a Nissan Leaf though you want the battery pack to start the day as cool as possible in summer else it will charge more slowly at each charge on a long journey and it’s difficult to disperse that pack temperature as it’s air cooled.
If you only ever do short journeys though it simply won’t matter to you. Those of us who often do over 300 miles in a day will be affected though & it should affect choice of car & charging strategy.
Some of us are probably also trying to heat the battery pack up just before rapid charging so that charge speed is higher, a winter trick, and that involves using lots of acceleration in the last few miles before charging, the so called “yo-yo-ing” technique, or, simply speeding up at the end of each leg of the journey. As EVs evolve & battery packs are bigger and faster charging, these techniques become less important. Battery pack management has also improved so batteries can be cooled & heated without needing to resort to these techniques.
So, my advice is to simply charge & drive without worrying about the battery degredation.