I just had something similar…
I just had something similar happen. I hit what I think was a chunk of ice that fell off a car in front of me. It broke through the plastic barrier on the bottom of my Model 3 and sheared off the coolant line. It didn't damage the actual battery, but Tesla told me they had to replace the whole battery and housing, $14,000. Tesla repaired it in their service center very quickly and my insurance paid for it. Now I'm waiting to see if they raise my insurance. They said it was an "At Fault" accident because I should have seen the ice and avoided it. It was dark when it happened.
Also, they put a "remanufactured" battery in it, which cut the life of the remaining warranty on my battery.