Definitely get him some kind of medical help as soon as possible. He's probably not doing it intentionally. It's amazing what we do when fully asleep and have no idea what we're doing!
Over the years, my beloved hubby, who is also my carer, has accidentally clobbered me in his sleep! He's NOT abusive, I'm NOT a battered wife, he's the most gentle and caring hubby I could ever have, I worship him and he knows it,
There was one time we were both asleep and all of a sudden I screamed out as excruciating pain shot into my left eye and around that part of the face. As I screamed he woke up. Apparently he was dreaming he was in a boxing match, which is weird as he's not a boxing fan at all, gave his opponent a good right hander and it was me that got a huge black eye and swollen face! He immediately rushed me to the fridge when he stuck a frozen bag of peas on it, apologizing profusely! He's 5'9 and 18 stone so packs a good punch! Once the pain started easing we had a jolly good laugh about it!
A few other times too over the years where he's accidentally hit me.
But the strange thing is, in November 2022 we rescued a cat from the streets, she was abused and neglected, scared and starving, she's still with us, happy and content and well fed, we both love her to bits and you know what? Hubby has had no more ''violent sleep episodes'' since we got her! She sleeps with us every night, snuggled in his arms with his beard! I'm batter free now!