Power supply apparatus and components thereof (thermal exchange)

A battery assembly comprising a thermal exchange device and a plurality of batteries arranged into a plurality of battery groups, wherein the battery group comprises a plurality of batteries in parallel connection and the battery groups are connected in series by a plurality of inter-battery connectors, wherein the thermal exchange device comprises a thermal contact surface which is in thermal contact with a heat transfer network, and a thermal exchange surface which is configured to perform heat exchange;

• wherein the heat transfer network comprises the plurality of inter-battery connectors which are in electrical contact with battery terminals of the batteries forming the battery assembly, wherein the inter-battery connectors are in physical and thermal contact with the thermal contact surface of the thermal exchange device to facilitate transfer of heat from the battery terminals to the thermal contact surface and are electrically insulated from the thermal exchange surface or the thermal exchange device;
• and wherein the inter-battery connector comprises a first terminal tab which is physically joined to a first battery terminal of a battery, a second terminal tab which is physically joined to a second battery terminal of another battery, and an inter-terminal tab electrically interconnecting the first terminal tab and the second terminal tab;
• and wherein the first battery terminal and the second battery terminal are battery terminals of opposite electrical polarity.