CELL INTERNAL SHORTCIRCUIT DETECTION DEVICE, METHOD, BATTERY PACK, AND ELECTRONIC DEVICE SYSTEM

摘要

A battery internal short-circuit detecting device has: a battery temperature detection unit for detecting a battery temperature Tr; an ambient temperature detection unit for detecting an ambient temperature Te; an average heating value detection unit for detecting an average value Pav of battery heating values per predetermined first period ”W1, which are generated by discharging or charging the battery; a battery temperature estimation unit for obtaining a battery temperature Tp estimated to be reached after a lapse of a predetermined second period ”W2 since the detection of the average value Pav of the heating values, based on the average value Pav of the heating values and the ambient temperature Te; and an internal short-circuit determination unit for determining that an internal short circuit has occurred when the actual battery temperature Tr after the lapse of the second period ”W2 is equal to or greater than the sum of the estimated battery temperature Tp and a predetermined coefficient ±.