Tempering element in a battery pack

The pack has a set of individually rechargeable battery cells (5) i.e. rechargeable battery flat cells (6), provided with a cathode arrestor and an anode arrestor, where the arrestors of the neighboring cells are electrically connected with one another. The arrestors are arranged at moderate temperature keeping element that is made from an electrical conductive material i.e. aluminum. A contact bridge is formed as an electrical interconnection between the arrestors, where the element is connected with a flowing medium e.g. gas or liquid, in a heat transfer manner.