METHOD FOR DETECTING LITHIUM PLATING, AND METHOD AND DEVICE FOR MANAGING BATTERY BY USING SAME

Provided are a method for detecting lithium plating, which can be used even when it is impossible to separately measure the potential of the negative electrode of a vehicle battery, for example, during use, and which does not require battery disassembly, and a method and a device for managing a batt...

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Bibliographic Details
Main Authors JOE, Won-Tae, NAM, Gi-Min
Format Patent
LanguageEnglish
French
Korean
Published 12.08.2021
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Summary:Provided are a method for detecting lithium plating, which can be used even when it is impossible to separately measure the potential of the negative electrode of a vehicle battery, for example, during use, and which does not require battery disassembly, and a method and a device for managing a battery, wherein the method for detecting lithium plating can be used to identify whether lithium plating occurs in a battery, thereby making a safety diagnosis. A method for detecting lithium plating according to the present invention comprises the steps of: detecting an open circuit voltage (OCV) after the full-charge of the battery and an OCV after the full-discharge of the battery for every charge/discharge cycle of the battery, and accumulating and tracking each of the OCVs; and determining whether lithium plating occurs in the battery on the basis of a result of the tracking of the OCV after the full-charge and the OCV after the full-discharge. It is determined that, among the tracking result, an interval satisfying the condition that the OCV after the full-charge decreases and the OCV after the full-discharge decreases is an interval in which lithium plating starts to occur. L'invention concerne un procédé de détection de placage de lithium, qui peut être utilisé même lorsqu'il est impossible de mesurer séparément le potentiel de l'électrode négative d'une batterie de véhicule, par exemple, pendant son utilisation, et qui ne nécessite pas de démontage de batterie, et un procédé et un dispositif de gestion d'une batterie, le procédé de détection de placage de lithium pouvant être utilisé pour identifier si un placage de lithium se produit dans une batterie, ce qui permet de réaliser un diagnostic de sécurité. Un procédé de détection de placage de lithium selon la présente invention comprend les étapes consistant : à détecter une tension de circuit ouvert (OCV) après la pleine charge de la batterie et une OCV après la décharge complète de la batterie pour chaque cycle de charge/décharge de la batterie, à et accumuler et à suivre chacune des OCV ; et à déterminer si un placage de lithium se produit dans la batterie sur la base d'un résultat du suivi de l'OCV après la pleine charge et de l'OCV après la décharge complète. Il est déterminé que, parmi le résultat de suivi, un intervalle satisfaisant la condition selon laquelle l'OCV après la pleine charge diminue et l'OCV après la décharge complète diminue est un intervalle dans lequel le placage de lithium commence à se produire. 차량용 배터리와 같이 사용 중 음극의 전위만 따로 잴 수 없는 경우에도 이용할 수 있고, 배터리 해체가 필요하지 않은, 리튬 플레이팅 검출 방법과, 이러한 리튬 플레이팅 검출 방법을 이용해 배터리에서 리튬 플레이팅 발생 여부를 확인하고 이에 따라 안전 진단을 할 수 있는 배터리 관리 방법 및 장치를 제공한다. 본 발명에 따른 리튬 플레이팅 검출 방법은 배터리의 매 충/방전 사이클마다 상기 배터리 만충전 후 개방회로전압(OCV: open circuit voltage)과 만방전 후 OCV를 검출하고 각각 누적해 트래킹하는 단계; 및 상기 만충전 후 OCV 및 만방전 후 OCV 트래킹 결과를 가지고 상기 배터리에서의 리튬 플레이팅 발생 여부를 판정하는 단계를 포함하며, 상기 트래킹 결과 중 만충전 후 OCV가 감소되고 만방전 후 OCV가 감소되는 조건을 만족하는 구간을 리튬 플레이팅이 발생하기 시작하는 구간이라고 판단한다.
Bibliography:Application Number: WO2020KR16037