It seems to me that your solution lies not in adding a command to close the data in your batch file, but instead to append a "Quit" command to the end of your Access macro "Macro1". The default option for the Quit command is "Save All". This will save any changes and close Access.
If you use Macro1 at other times and don't want the macro to always close Access, make a duplicate of Macro1 and add the "Quit" command to that macro. Then change your BAT file to call that macro instead of Macro1.