Battery management system, calculation system, battery degradation prediction method, and battery degradation prediction program

A vehicle comprising:

• a battery;
• one or more memories;
• a vehicle controller;
• and
• at least one processor each coupled to at least one of the one or more memories and configured to perform operations comprising:
• obtaining at least a voltage and a current of the battery;
• estimating a state of health of the battery based on measurement data of the battery;
• performing curve regression on a plurality of states of health identified in time series for the battery to generate a deterioration regression curve of the battery, wherein the plurality of states of health includes the state of health, and the deterioration regression curve is expressed by a formula:
• SOH=w0+w1√t,
• where SOH represents the state of health, w0 represents an initial value, w1 represents a deterioration coefficient, t represents the time series, and the curve regression is performed to determine w1;
• determining whether or not rapid deterioration has occurred in the battery based on a difference or a ratio between a first value of w1 corresponding to the deterioration regression curve of the battery generated based on the plurality of states of health in a first data section and a second value of w1 corresponding to the deterioration regression curve of the battery generated based on the plurality of states of health in a second data section, the plurality of the states of health in the first data section and the plurality of the states of health in the second data section being included in the states of health specified in time series for the battery;
• generating a signal for turning on a warning lamp in response to determining that the rapid deterioration has occurred in the battery;
• and
• transmitting the signal to the vehicle controller, wherein
• the vehicle controller is configured to turn on the warning lamp indicating an abnormality of the battery in response to receiving the signal.