AFAIK no. Maybe the app developer can add code to exclude it from reporting as device battery, because it’s a car battery.
I also would like to recommend to report to Athom homey.app/support, because for users, it should be possible to exclude home- & car batteries and the like, from the default low battery warning system.
For my vacuum cleaner, I ended up with using Timeline Wrangler script, to remove low battery warnings on the minute they’re sent:
