Patent ID: 9726731
Date: 2017-08-08
CPC Classifications: G01R,H01M,H02J,Y02E

Claim:
1. A battery pack comprising: a plurality of series connection units connected in series, each of the plurality of series connection units comprising a plurality of battery cells, the plurality of battery cells in each of the plurality of series connection units connected in parallel; a voltage detector that detects a voltage signal of a high-voltage side of each of the plurality of series connection units; and a battery controller that receives the voltage signal detected by the voltage detector and determines a voltage of each of the plurality of series connection units, wherein the battery controller determines whether the plurality of battery cells in each of the plurality of series connection units has been disconnected based on the change of voltage of each of the plurality of series connection units, by determining a time based slope in the change of the voltage of each of the plurality of series connection units and determining whether the plurality of battery cells in each of plurality of series connection units has been disconnected based on the determined slope of each of the plurality of series connection units.