9 Apparatus, instruments and cables for electricity, in particular cooling parts, structural parts, fixation and electronic isolation parts for use in relation to batteries and battery systems; cell holders for batteries and battery systems, in particular for batteries for vehicles and for vehicle battery systems; spacers for batteries and battery systems, in particular for batteries for vehicles and for vehicle battery systems; covers, for batteries and battery systems, in particular for batteries for vehicles and for vehicle battery systems; electric cables for batteries and battery systems, in particular for batteries for vehicles and for vehicle battery systems; holders adapted for battery modules and battery systems, in particular for batteries for vehicles and for vehicle battery systems; housings, for batteries and battery systems, in particular for batteries for vehicles and for vehicle battery systems; stands adapted for batteries and battery systems in the form of supporting rails, in particular for batteries for vehicles and for vehicle battery systems; holders in the form of holding profiles adapted for battery modules and battery systems, in particular for batteries for vehicles and for vehicle battery systems; interconnectors for batteries and battery systems, in particular for batteries for vehicles and for vehicle battery systems; structural components for mechanical integration for battery modules and battery systems for vehicles, in particular battery holders, fixation parts, electronic isolation parts, battery case covers, battery case troughs, reinforcement profiles; structural components with cooling function for batteries and battery systems for vehicles, in particular battery holders, fixation parts, electronic isolation parts, battery case covers, battery case troughs, reinforcement profiles; parts for batteries and battery systems having electrical insulating properties for vehicles; stands in the form of supporting rails adapted for electric conductors; stands with insulating function in the form of insulating rails for electric conductors, in particular stands in the form of electroconductive rails and sliding rails; measuring devices, namely linear distance measuring devices, light grid sensors, light sensors, and extruded plastic components being parts of said measuring devices; monitoring instruments, namely meters for monitoring electricity, light grid sensors, and extruded plastic components being parts of said monitoring instruments; sensors and detectors for proximity detection, leakage detection, fluid flow detection and extruded plastic components being parts of said sensors and detectors; electrical switch cabinets; electric coils, and structural components of plastic for holding electric coils, for fixing windings; electrical rotary converters, and structural components of plastic for use in relation to electrical rotary converters