CONTROL METHOD OF BATTERY SYSTEM, AND BATTERY CONTROL DEVICE AND BATTERY SYSTEM PERFORMING THE SAME

An embodiment of the present disclosure provides a battery control device of a battery system including at least one battery module, including: a storage device configured to store a safety limit range for a parameter related to a state of the at least one battery module and a threshold setting value for the parameter; a communication device configured to communicate with a test device; and a controller configured to operate a protection function of the battery system based on the threshold setting value, to change the threshold setting value based on a change value received from the test device if a change of the threshold setting value is requested, and to limit the change of the threshold setting value if the change value is out of the safety limit range.