Looking under the hood of my Volvo V50, I noticed there's a small air duct in the hood's sound-proofing that force-feeds fresh air from behind the grill to the largely enclosed battery.
For me, it's the first time I've seen anything like this on any car.
Why would Volvo do that ?
If I block the grill, that'll also bock the air to the battery.
What effects are to be expected ?