There's a lot to charging a battery with a wind generator besides the obvious components. What kind of battery are you charging? What are you using for a generator and what is the output?
Different battery types must be charged in a certain way, and having a good charge controller set up for the proper battery type is imperative.
Here is a good source for DIY wind and solar battery charging. It may not fit what you are trying to do, but there is a lot of good information here from someone who has been through this and had good success.
http://mdpub.com/
This setup is for charging Lead Acid batteries. There are two controller designs this gentleman has come up with. They are easy to build and have worked for him for several years charging a "Deep Cycle" Lead Acid Battery.