APPARATUS FOR WAKING UP MULTI-BMS

摘要

Disclosed is an apparatus for waking up a multi-BMS of a battery pack. The apparatus for waking up a multi-BMS of a battery pack according to the present disclosure transmits a wakeup signal outputted from a master BMS to N slave BMSs to wake up the N slave BMSs managing each battery module in the battery pack, and an isolator is connected on a series line used to the wakeup signal, and turns on by the wakeup signal outputted from the master BMS and enables N-1 transistors each connected on the series line to turn on. According to the present disclosure, the signal for waking up the plurality of slave BMSs may be transmitted by using a small number of isolators. Therefore, the BMS or the battery pack may reduce in costs.

主权项

1. An apparatus for waking up a multi-BMS of a battery pack including N battery modules (N is an integer greater than or equal to 2) that transmits a wakeup signal outputted from a master BMS to N slave BMSs to wake up the N slave BMSs managing each battery module in the battery pack, the apparatus comprising:
a series line connected between a high potential terminal and a low potential terminal of the battery pack to transmit the wakeup signal; an isolator connected on the series line and configured to turn on by the wakeup signal outputted from the master BMS; N−1 transistors connected to a higher potential than the isolator on the series line, each having two terminals other than a base terminal being connected on the series line and the base terminal being connected to each low potential terminal of N−1 battery modules among the N battery modules; and a switch unit connected between the isolator and the high potential terminal of the battery module or between each transistor and each high potential terminal of the battery modules, and configured to transmit the wakeup signal to wake up the N slave BMSs by the turn-on operation of each transistor or the isolator.