Battery pack

Abstract

A battery pack includes a battery module (3010) and lid modules. The battery module (3010) comprises a liquid-limiting casing (0080) having a peripheral wall (0090) that includes a module-wall-vertical-channel (3098). A circuit board is disposed within the module-wall-vertical-channel (3098). A flexible circuit member is electrically connected to the circuit board and extends laterally into the battery-pack space (3032) to connect to battery-cell-connecting members (0026). The flexible circuit member performs at least one of sensing a state of battery cells and heating the battery cells. This configuration maximizes internal volume utilization by integrating electronic components into the peripheral wall (0090) of the liquid-limiting casing (0080) and utilizes the flexible circuit member to reliably manage thermal and mechanical stress within the immersion environment.