First, create a folder for your JPG's.
Then go back into Photoshop, open the "Actions" panel and create a new action. Open up one of the `PSD` files and go through the motions of saving it as a `JPG` into that `JPG` folder you just created earlier. After saving it, close your file (do not save) and Stop the Action. Now that you have that action saved, you can go into "Batch" which is located here (File > Automate > Batch). 

[![Batch Dialog box][1]][1]

  [1]: https://i.sstatic.net/yYnII.png

This method is good if you intend to do this often. Hope this helps.