The test stand consists of a special foundation with air springs, a mounting bracket for the test sample machine, the load machine and battery simulator. Operation with a real high-voltage battery is optional. The conditioning system for the cooling liquid ensures reproducible conditions in the cooling circuit depending on the load status. On request the test stand can be equipped with a climatic chamber for simulating ambient conditions. Our flexibly configurable PAtools TX automation system controls and regulates the test stand with its auxiliary equipment and acquires all measuring and computing quantities.