Use of 7zip "exclude wildcards" in batch file - batch-file

Question

I have a batch file for project backup, that i want to modify to exclude unnecessary files.
My current file uses simple 7z command to pack whole folder into one archive:
!7zipPath! a -t7z "archive_name" "path_to_add".
From what i found in other people questions, to exclude given files, i can use flag, for example -x!.txt, or -xr!.txt if path consist subfolders.
!7zipPath! a -t7z "archive_name" "path_to_add" -xr!*.jt
This should exclude all files with .jt extension (software specific extension), but -x!*.jt returns "incorrect wildcard typemaker *.jt
So from what i understand 7zip does not know this extension so i can not use it (is that correct thinking?)
So instead i tried to use include only. Answers from other question says that it should be simply added like this:
!7zipPath! a -t7z "archive_name" "path_to_add" ./*.xml
In my understanding this should create archive that includes only .xml files while keeping structure, but it just ignores that wildcard and put all the files from the path. It does not return any kind of error.
How can i use 7zip command options in batch file 7z command to get expected results?
PS; Will it work with extension on a folder? So that it would include whole folder.cojt for example?
EDIT: Full code
#echo off
setlocal EnableDelayedExpansion
SETLOCAL ENABLEEXTENSIONS
rem Get the time from WMI - at least that's a format we can work with
set X=
for /f "skip=1 delims=" %%x in ('wmic os get localdatetime') do if not defined X set X=%%x
rem dissect into parts
set DATE.YEAR=%X:~0,4%
set DATE.MONTH=%X:~4,2%
set DATE.DAY=%X:~6,2%
echo Today is: %DATE.YEAR%-%DATE.MONTH%-%DATE.DAY%
if not exist %DATE.YEAR%-%DATE.MONTH%-%DATE.DAY% (
echo Making Backup
For /F "Delims=" %%A In ('where /r "C:\Program Files\7-Zip" /f 7z.exe') do Set zipPath=%%A
IF NOT DEFINED zipPath (
echo Extending search range for 7zip...
For /F "Delims=" %%A In ('where /r C:\ /f 7z.exe') do Set zipPath=%%A
)
IF NOT DEFINED zipPath (
echo Extending search range for 7zip...
For /F "Delims=" %%A In ('where /r D:\ /f 7z.exe') do Set zipPath=%%A
)
IF NOT DEFINED zipPath (
echo 7zip not found on this PC
echo You can close this window now
cmd /k
)
md %DATE.YEAR%-%DATE.MONTH%-%DATE.DAY%
cd %DATE.YEAR%-%DATE.MONTH%-%DATE.DAY%
!zipPath! a -t7z "%DATE.YEAR%-%DATE.MONTH%-%DATE.DAY%_TuneCells" "M:\01\TuneCells\"
)
if exist %DATE.YEAR%-%DATE.MONTH%-%DATE.DAY% (
echo Backup already created %DATE.YEAR%-%DATE.MONTH%-%DATE.DAY%
)
PAUSE
As mentioned in one of commends, the search for 7z is there so that multiple people can easily use the code regardless of their installation path preferences (which are surprisingly wide)