VEHICLE BATTERY SYSTEM AND METHOD FOR DETECTING AND COPING WITH SWELLING PHENOMENON

According to an aspect of the present disclosure, there may be provided a battery system including a plurality of battery cells, polyurethane (PU) foam arranged between the plurality of battery cells, a strain gauge disposed on a side surface of the battery cell, a cell management controller (CMC) that converts a signal received from the strain gauge and transmits the converted signal to a battery management system (BMS), and the BMS that determines a state of the battery cell through the signal received from the CMC, wherein the BMS determines that a swelling phenomenon occurs when the signal input to the CMC is transmitted to the BMS and a time during which a value of the signal exceeds a set limit value continues for a set time or more due to a resistance value converted by the strain gauge, and thus an automatic coping operation is implemented, and the BMS is normally operated when the time during which the value of the signal transmitted to the BMS exceeds the set limit value is not greater than the set time.