Battery assembly with temperature control mechanism

A battery assembly comprising:

• a stacked array of closely spaced unit batteries having first side walls disposed in mutually facing relation and second side walls facing outwardly of said battery assembly;
• a plurality of heat-transfer plates each composed of a first heat-exchange planar member sandwiched between, and held against, first side walls of an adjacent pair of the unit batteries, and a second heat-exchange planar member integrally joined to said first heat-exchange planar member and projecting outwardly from the second side wall of at least one of the adjacent pair of the unit batteries;
• holding means for holding said array of closely positioned unit batteries and said heat-transfer plates together;
• and
• a temperature control mechanism for controlling a temperature of the unit batteries through a heat exchange carried out by said first heat-exchange planar members and said second heat-exchange planar members.