bidirectional ac-dc converter
I think, there are contributions related to hybrid drive concepts in automotive electronics professional journals. Obviously, many major automotive companies are already working with prototype designs of high voltage hybrid drive.
Generally, you didn't clarify, if you are doing research at the system concept level or are also involved in inverter circuit design. Simulink simulation e.g. may be helpful in evaluating the overall system behaviour but can't give answers to circuit design questions.
As you mentioned isolated DC/DC. I think, I won't be used in automotive unless explicitely required by safety concepts or resulting in efficiency or weight/volume advantages, which probably isn't the case, either.