Battery system

A battery system, comprising:

• a first battery subpack having a subpack microprocessor operably coupled to a first electrical connector;
• a first switch circuit being electrically coupled to the first battery subpack, the first switch circuit applying an operational voltage to the subpack microprocessor of the first battery subpack when the first switch circuit receives a first control signal from a master controller;
• the subpack microprocessor of the first battery subpack determining voltages at a plurality of ports coupled to the first electrical connector to determine a first address associated with the first battery subpack when receiving the operational voltage;
• the first battery subpack having first and second battery cells electrically coupled in series to one another, a cell monitoring circuit, and the subpack microprocessor;
• the cell monitoring circuit of the first battery subpack being operably coupled to the first and second battery cells thereof, the subpack microprocessor of the first battery subpack operably communicating with the cell monitoring circuit thereof;
• the cell monitoring circuit of the first battery subpack measuring first and second voltages of the first and second battery cells, respectively, thereof to obtain first and second voltage values, respectively;
• the first switch circuit being electrically coupled to the subpack microprocessor of the first battery subpack, the first switch circuit applying the operational voltage to the subpack microprocessor of the first battery subpack when the first switch circuit receives the first control signal from the master controller;
• the subpack microprocessor of the first battery subpack sending a first message with the first address to the master controller;
• the master controller sending a second message that requests the first and second voltage values from the subpack microprocessor of the first battery subpack;
• the subpack microprocessor of the first battery subpack sending a third message having the first and second voltage values of the first battery subpack to the master controller;
• the master controller stopping a generation of the first control signal to induce the first switch circuit to remove the operational voltage from the subpack microprocessor of the first battery subpack when the master controller does not receive the third message having the first and second voltage values from the subpack microprocessor of the first battery subpack within a first predetermined amount of time after sending the second message;
• the master controller sending a fourth message to a vehicle controller requesting that the vehicle controller reduce an electrical load of a vehicle powertrain when the master controller does not receive the third message having the first and second voltage values of the first battery subpack within a second predetermined amount of time after sending the second message.