Battery Control System and Battery Control Method

A battery control system includes: pressure application means that applies pressure to a battery module by pressing the battery module along a stacking direction of battery cells having a negative electrode including a solid electrolyte and lithium; a controller that adjusts the value of the pressure by controlling the pressure application means; and discharge means that executes balancing of remaining discharge capacities among the battery cells in the battery module; wherein the controller starts a first pressurization control for increasing the pressure by the pressure application means to a predetermined pressure or higher before the balancing is started.