Does my husband need to know where am I taking our kid?

Hopefully by now, you would've had enough time to consult with a family law attorney.  You may want to seek a protective order.  It may be difficult to charge rape againsts you husband as you both are still married and it'll be difficult to prove the difference between consensual and nonconsensual sex.  If you want to remain in the home where you both reside, then you can consider seeking a kick out order in your application for protective order while simultaneously filing a separate divorce action against him.  These are two separate lawsuits, so you will most like have to pay your attorney for two separate cases.  In some cases involving family violence, the courts may allow for the nondisclosure of private address information, but you have to make a compelling case for it.