SET srcdir=C:\test\
SET dstdir=C:\ZipBackups\

SET datenow=%date:~-4,4%%date:~-7,2%%date:~-10,2%

CD /d %srcdir%

"C:\Program Files\7-Zip\7z.exe" a -r -bd -y  "%dstdir%\archive_%datenow%.zip" "%srcdir%\*"

forfiles /S /D -7 /P %dstdir% /M *.zip /C "cmd /c del /F @path"