Secondary battery charger, temperature information acquisition device, secondary battery charging method, and in-situ measurement method of electrochemical impedance spectrum

摘要

The secondary battery charging device includes a charge control device 30 that controls a charging current for charging the secondary battery 20, and a temperature information acquisition device 40 that acquires the internal temperature of the secondary battery 20. The acquisition device 40 collects a plurality of charging current data and charging voltage data in time series during charging of the secondary battery, and determines the internal temperature of the secondary battery based on the collected charging current data and charging voltage data. The charging control device 30 controls the charging current for charging the secondary battery 20 so that the internal temperature of the secondary battery acquired by the temperature information acquisition device 40 falls within a predetermined temperature range. The secondary battery 20 is charged.