Exact knowledge of thermal behavior and temperature curves is particularly important for the further development of high-voltage battery systems. The acquisition of temperatures between cells and other vital points throughout the battery must be done safely to protect personnel and equipment. Often this is done at several hundred points at the same time. The HV DTemp measurement system was developed for the accurate, digital and thus interference-free acquisition of up to 512 measurement points for temperature or humidity. The sensors are connected via a single cable connection to the HV DTemp-P central unit, with only one pass-through of the battery housing.