Sorry, I don't know much about PS3 controllers ha. Ask me anything about xbox controllers and I could tell you, but PS3 is an entirely different story.
If that is the case and PS3 controllers are battery powered then you would possibly encounter issues with trickle charging. Battery companies warn not to try to recharge disposable batteries in any way, and for good reason too. I guess you could probably counter that issue by using rechargeable batteries.