Is it possible for a man to have bladder infection without symptoms but pass it on to his partner?

Bladder infection ? "Possible", but unlikely for a male to be asymptomatic with a verifiable "bladder infection". More likely is intercourse may have inoculated the female urethra or simply caused irritation by friction, giving symptoms of cystitis in the female. If unsure, get a uring clean catch specimen at your PMP office with a culture to establish the diagnosis.