| 主权项 |
1. A protective device for a battery assembly, wherein the battery assembly comprises N cells, N is an integer greater than 2, and the protective device comprises:
a constant current source module comprising M first constant current sources, the M first constant current sources being connected in parallel with M cells in the N cells respectively, and configured to generate an output current according to a voltage of the connected cell, wherein M is a positive integer smaller than N; a voltage sampling module comprising N voltage sampling units, the N voltage sampling units being connected in parallel with the N cells respectively and configured to output a sampling voltage; a determining module connected with the voltage sampling module and configured to generate a first disconnection signal when the sampling voltage outputted from any one of the N voltage sampling units reaches a predetermined value; and a protective control module, connected with the determining module and configured to control the battery assembly to turn off according to the first disconnection signal. |
