Battery pack, treatment system and method for the production of a battery pack

A battery pack for supplying an electrically driven treatment apparatus with an electric driving power, the battery pack comprising:

• a plurality of accumulator cells having cell contacts;
• at least one circuit board electrically connected to the cell contacts;
• and
• a battery pack housing, wherein
• the battery pack housing has a first battery pack housing part and a second battery pack housing part,
• the first battery pack housing part and the second battery pack housing part are closed by each other, and
• the accumulator cells are disposed within the battery pack housing and the at least one circuit board is disposed within the battery pack housing, wherein
• the second battery pack housing part is a housing cover, the second battery pack housing part having at least one thread,
• the first battery pack housing part is a housing container, the first battery pack housing part having at least one head abutment surface,
• the head abutment surface is disposed on an end adjacent to and within 20 millimeters or less of the second battery pack housing part,
• the battery pack has at least one screw,
• the screw is screwed into the thread for mechanical connection of the second battery pack housing part and the first battery pack housing part to each other,
• a screw head bears on the head abutment surface,
• the first battery pack housing part has at least one groove to guide the battery pack in mechanical connection to the treatment apparatus, and
• the groove extends on the head abutment surface in prolongation of the thread.