Method for determining state of health of a lithium-sulfur battery

The present invention provides a method of estimating a state of health (SoH) of a lithium-sulfur battery. The method includes the steps of: a) maintaining a SoH confirmation target battery in a rest state for 0.01 seconds or more in a state in which the SoH confirmation target battery is fully char...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KIM BONG SOO, AHN JI HOON, HAN DONG HYEOP
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BASIC ELECTRIC ELEMENTS 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 PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TESTING
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Beschreibung
Zusammenfassung:	The present invention provides a method of estimating a state of health (SoH) of a lithium-sulfur battery. The method includes the steps of: a) maintaining a SoH confirmation target battery in a rest state for 0.01 seconds or more in a state in which the SoH confirmation target battery is fully charged; b) measuring OCV_(det) in a state in which a voltage drop is made during the rest state; c) calculating ΔOCV by subtracting the OCV_(det) from OCV_(ini) previously measured in the same manner as in steps a) and b) at an initial stage of use of the SoH confirmation target battery; and d) estimating a SoH (%) of the battery from a magnitude of the ΔOCV. The present invention provides the method which can reliably estimate the SoH of the lithium-sulfur battery in a simple way. 본 발명은 전지의 건강상태(SoH, state of health)를 추정하는 방법으로서, a) 건강상태 확인 대상 전지를 완전히 충전시킨 상태에서 0.01초 이상 휴지 상태로 유지하는 단계; b) 상기 휴지 상태 동안 전압강하가 이루어진 상태에서 OCV(det)를 측정하는 단계; c) 상기 건강상태 확인 대상 전지의 사용 초기에 상기 a) 및 b)와 동일한 방법으로 미리 측정해 둔 OCV(ini)로부터 상기 OCV(det)를 빼서 △OCV 를 구하는 단계; 및 d) 상기 △OCV의 크기로부터 전지의 건강상태(%)를 추정하는 단계;를 포함하는 리튬-황 전지의 건강상태 추정 방법을 제공한다.