BATTERY ABNORMALITY DETECTION SYSTEM, BATTERY ABNORMALITY DETECTION METHOD, AND BATTERY ABNORMALITY DETECTION PROGRAM
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United States of America
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Issued Date -
Mar 6, 2025
app pub date -
Jan 6, 2023
filing date -
Jan 6, 2023
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Abstract
A data acquirer acquires voltage data and current data of a plurality of cells in a battery pack including the plurality of cells connected in series, or voltage data and current data of a plurality of parallel cell blocks in a battery pack including the plurality of parallel cell blocks each including a plurality of cells connected in parallel. Based on the voltage data and the current data of each of the cells or each of the parallel cell blocks, a dV/dQ estimator estimates dV/dQ indicating a differential value of the voltage with respect to the capacity of each of the cells or each of the parallel cell blocks. A determiner determines whether or not a micro-short circuit has occurred in the battery pack based on a change in variation of characteristic points of dV/dQ between the plurality of cells or the plurality of parallel cell blocks.
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