The state of internal resistance is appropriately expressed for a battery being energized. A battery management system includes a battery information acquisition section, a voltage calculation section, a current fluctuation amount calculation section 109 and a resistance correction amount calculation section. The battery information acquisition section acquires a voltage value V of a storage battery being energized. The voltage calculation section acquires a predicted battery voltage value Vmodel of the storage battery being energized by a method different from that of the battery information acquisition section. The current fluctuation amount calculation section calculates a current fluctuation amount dI/dt of the storage battery per unit time. Based on the comparison result of the voltage value V and the predicted battery voltage value Vmodel and the current fluctuation amount dI/dt, the resistance correction amount calculation section corrects an equivalent circuit model expressing the internal state of the storage battery including a DC resistance component R0 and a polarization resistance component Rp.
Battery Management System, Battery System and Hybrid Vehicle Control System
2019-01-24
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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