ASSEMBLED BATTERY AND BATTERY PACK

Provided are an assembled battery and battery pack which are easy to design and assemble, and are capable of inhibiting the occurrence of thermal runaway by inhibiting the propagation of heat between battery cells and efficiently cooling the battery cells during normal operations and abnormal operations. Battery cells (2) each have an electrode surface (2a) having an electrode (3) and an outer peripheral surface (2b), which is the surface orthogonal to the electrode surface (2a). The battery cells (2) respectively have the outer peripheral surfaces (2b) disposed so as to face each other, and are connected in series or in parallel via an electrode (3) and a connector (not shown), etc. The outer peripheral surface of the battery cell (2) is covered with a flame proof material (4) and the outer peripheral surface of the flame proof material (4) is further covered with a heat dissipating member (8), thereby forming an assembled battery (10). The heat dissipating member (8), for example, is a tubular body that is open on both ends thereof, and covers the battery cell (2) and the outer peripheral surface of the flame proof material (4).