BATTERY MONITORING DEVICE AND BATTERY SYSTEM

To provide a battery monitoring device allowing for reduction of the number of battery cells to be replaced as much as possible by effectively utilizing the battery cells as compared with the conventional case in a battery system including the plurality of battery cells.SOLUTION: A battery monitoring device comprising a central processing unit and a storage device is provided. The central processing unit determines whether each battery group 212 needs to be replaced on the basis of the degree of deterioration of the battery group 212 calculated on the basis of the detection results of a current sensor 213 and a battery management device 214 as a voltage sensor. Further, when the central processing unit determines that the battery group 212 needs to be replaced, the central processing unit identifies a battery group 212 to be replaced on the basis of the degree of deterioration of the battery group 212. Further, the central processing unit calculates a parameter or the number of replacements of a new battery group 212 to be replaced with the battery group 212 to be replaced on the basis of the permissible current value of the new battery group 212.SELECTED DRAWING: Figure 3 【課題】複数の電池セルを備える電池システムにおいて、電池セルを従来よりも有効に活用して、電池セルの交換数を可及的に削減可能な電池監視装置を提供する。【解決手段】中央処理装置および記憶装置を備えた電池監視装置。中央処理装置は、電流センサ２１３および電圧センサとしての電池管理装置２１４の検知結果に基づいて算出された各々の電池群２１２の劣化度に基づいて、電池群２１２の交換の要否を判定する。また、中央処理装置は、電池群２１２の交換が必要と判定した場合に、電池群２１２の劣化度に基づいて交換対象の電池群２１２を特定する。さらに、中央処理装置は、その交換対象の電池群２１２と交換される新たな電池群２１２のパラメータまたは交換数を新たな電池群２１２の許容電流値に基づいて算出する。【選択図】図３