Link between bipolar and psychopathy

That's not exactly true. All psychopaths are not bipolar, and all bipolar people are not psychopaths, but there is a statistical correlation between bipolar and psychopathy. 16% of adult onset bipolar people are also sociopathic/psychopathic. The percentage gets much higher the younger the onset of bipolar, with childhood onset bipolar having a 37% correlation. The baseline is that 4% of the general population is sociopathic/psychopathic

I think the gist of this is, and I'm pretty much repeating what a lot of other posters have already said, the guy is an asshole. Whether it is because he is bipolar or psychopathic or both is moot, he's still an asshole and you can't do anything about that. Leave, sooner rather than later, and don't look back.

I *do* hope you are able to eventually extricate yourself from this abusive relationship, both for your sake and that of your child.

I don't think his behavior is necessarily related to bipolar (how was he diagnosed, by the way, is it a sure thing?). I do not think he is beating on you and manipulating you, etc. because he is bipolar. Maybe he is antisocial. But whatever label he has given himself *is no excuse* for his behavior.

Please try to think of him as someone with *no* diagnosis. None. He is responsible for this behavior and it is up to him to do something about it. His diagnosis(es) don't matter, his behavior does, and your safety and wellbeing does. I hope you keep you and your child safe, as best you can.