BATTERY PACK MANAGEMENT DEVICE, BATTERY PACK MANAGEMENT METHOD, AND BATTERY PACK SYSTEM

摘要

PROBLEM TO BE SOLVED: To accurately grasp abnormality of a single battery pack such as an internal short circuit and wire disconnection when a plurality of single battery packs are used as a battery pack.SOLUTION: When a single battery pack 3 is constituted by connecting a plurality of single cells 2 in series, and the plurality of the single battery packs 3 are connected in parallel to each other to be used as a battery pack 3A, charge current values Iof the respective single battery packs 3 are measured, and the abnormality of the specific single battery pack 3 is determined based on the relative comparison of the charge current values Iof the respective measured single battery packs 3 or the difference between the charge current value Iat the initial stage of use and the charge current value Iafter use passage.