SAFE STATE DETECTION METHOD FOR LITHIUM-ION SECONDARY BATTERY, SAFE STATE DETECTION APPARATUS, POWER STORAGE DEVICE, SAFE STATE DETECTION SYSTEM, AND RECORDING MEDIUM

A safe state detection method for a lithium-ion secondary battery, includes: calculating an absolute value of a differential coefficient of a discharge curve from which a voltage equivalent to a voltage drop of the lithium-ion secondary battery is removed; determining a first battery voltage when th...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	NOZU, Ryutaro
Format:	Patent
Sprache:	eng
Schlagworte:	CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS SYSTEMS FOR STORING ELECTRIC ENERGY TESTING
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A safe state detection method for a lithium-ion secondary battery, includes: calculating an absolute value of a differential coefficient of a discharge curve from which a voltage equivalent to a voltage drop of the lithium-ion secondary battery is removed; determining a first battery voltage when the degree of increase in the absolute value of the differential coefficient is greater than a threshold value; determining a second battery voltage at a start of an increase in oxidation heat in response to the first battery voltage, the oxidation heat being heat generated inside the lithium-ion secondary battery when the lithium-ion secondary battery is overcharged; and detecting a safe state of the lithium-ion secondary battery, based on the determined second battery voltage.