Patent ID: 9711977
Date: 2017-07-18
CPC Classifications: B60L,G01R,H01M,H02J,H04J,H04Q,Y02E,Y02T

Claim:
1. A battery management system for managing a battery pack, the battery management system comprising: a plurality of groups of secondary batteries series connected and included in the battery pack; two or more battery management devices each being electrically connected to a corresponding group of the secondary batteries and configured to generate at least two signals including at least two pieces of data using time division; a signal mixer configured to sequentially receive, via a corresponding communication line, the at least two pieces of data generated by each of the two or more battery management devices, and mix, into a single signal, each of the received at least two pieces of data, wherein the data mixed into the single signal includes both the at least two pieces of data received from a first battery management device among the two or more battery management devices, and the at least two pieces of data received from each of the remaining battery management devices; a master device directly electrically connected to the first battery management device, wherein the first battery management device is directly electrically connected to both the signal mixer and the master unit, and each of the remaining battery management devices is directly electrically connected to the signal mixer but not the master device; and an insulation element electrically connected to the signal mixer and configured to transmit the mixed single signal to an external device while electrically disconnecting the external device from the battery management system to protect the external device from damage by preventing a high voltage current from being input to the external device from the battery pack.