Story where child is raised by robots and 'rescued' by humans

I'm trying to remember what book this was. Think it was a scene in a full length novel. Might have been adult sci-fi or young adult. The bits I remember clearly:

• There was an 'orphanage' where children were raised by robots without human contact


• The main character (almost certain it was a female human) attacks the orphanage at some point and rescues the children or one particular child


• The child was scared of the humans because it had only ever had robot contact


• After they attacked the orphanage there was a battle

I can't quite remember!