BATTERY MODULE AND ASSEMBLED BATTERY

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...

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Bibliographische Detailangaben
Hauptverfasser:	TANAKA, Akihide, YAGI, Yohshin
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	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.