Rust saw 94 minutes on the floor in 2024-25.
Dane Dowiak earned Most Outstanding Player for his performances.
This marks Battle's second stint as an assistant coach as he previously served on Penn State's coaching staff from 2020-21.
Brown is transferring from Temple, where he played eight games for the Owls in the 2024-25 season.
Penn State was previously ranked 13th in the USA Hockey Poll.
The announcement comes after the Nittany Lions secured a spot in the Frozen Four on Sunday.