write a bat file with %xxx% content with by using a bat file

I want to use my batch file which I converted to an exe file to create another batch file that has the content %key% in it. When I try to execute the exe file, the %key% is ignored/deleted. same happens when using %random%.... how can I prevent my 1st batch file with which i create the 2nd one to delete %xxx% expressions? I want the the 1st batch just ignores the %xxx% expression and just copy it into the 2nd bat file without executing anything