BATTERY PACK DEVICE, METHOD FOR CHECKING BATTERY PACK DEVICE, AND COMPUTER READABLE MEDIUM

According to an embodiment, a battery pack device includes a plurality of battery modules, a cell detector, and a determiner. Each of the plurality of battery modules stores a plurality of cells. The cell detector detects a cell detection signal representing whether a cell is present or absent at each of a plurality of positions in each battery module. The determiner determines the arrangement state of the cells in each battery module based on the cell detection signal detected by the cell detector, determines the presence/absence of an abnormality from the determined arrangement state of the cells and the connection state of each battery module, and outputs an abnormal signal in case of the abnormality.