One way (the simplest) is to create Tools -> External Tool menu item to call build bat. After than you simply edit files as normal in VS. Note that intellisense will probably freak out and not work because there is not project set up, so it does not know about your defines or compiler options.
Another option is create VS makefile project, and set "build.bat" as make command. Then running "do build", "run debugger" keyboard shortcuts will work as usual. But same issues with intellisense.