Secondary battery resistance factor determination method, charging output estimation apparatus and method using the resistance factor

摘要

The method for determining a resistance factor of a secondary battery according to the present invention includes a boundary line in which a charge termination IV profile due to a change in the magnitude of a charging current is set as a charge upper limit when the secondary battery has a predetermined temperature and state of charge. A first derivative value with respect to the initial charge IV profile calculated by the current value at the intersection intersecting with is determined as a resistance factor corresponding to the temperature and the state of charge. In addition, the charging output estimation apparatus and method according to the present invention corresponds to the temperature and the charging state of the secondary battery during the charging of the secondary battery using the resistance factor defined in advance for the charging state and temperature of the secondary battery. Estimate charging output. [Selection] Figure 3