Is it necessary to limit a battery's current output?
In general, a load will draw only as much current as it "needs".  See Ohm's Law.

HOWEVER,  LiPo, batteries ALWAYS require load limiting and charge limiting to prevent them from catastrophic failure and danger. LiPo batteries are NOT safe or stable on their own without protective circuits around them. There are many spectacular failures related to faulty LiPo protection. This is not something to be taken casually.