A battery module 100 includes a lithium ion secondary battery 200 and a control circuit 300. The control circuit 300 includes a measurement unit 310 which measures a voltage, a current, and a time of charge/discharge of the lithium ion secondary battery 200, an operation unit 320 which calculates a capacity Q on the basis of the voltage, the current, and the time and calculates a differential value dQ/dV by differentiating the capacity Q with a voltage V, a threshold voltage setting unit 330 which specifies a peak of a low capacity side of the differential value dQ/dV generated on the basis of a stage structure of graphite and sets a voltage at the peak to a threshold voltage, a cutoff voltage setting unit 340 which sets a discharge cutoff voltage of the lithium ion secondary battery 200 on the basis of the threshold voltage, and a charge/discharge control unit 360 which controls the charge/discharge of the lithium ion secondary battery 200 on the basis of the discharge cutoff voltage.
BATTERY MODULE AND ASSEMBLED BATTERY
BATTERIEMODUL UND ZUSAMMENGESETZTE BATTERIE
MODULE DE BATTERIE ET BATTERIE ASSEMBLÉE
2019-06-05
Patent
Electronic Resource
English
IPC: | 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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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