| 主权项 |
1. An equalization device for equalizing cell voltages of a plurality of battery cells of an assembled battery, the number of the plurality of battery cells being n which is a positive integer, the plurality of battery cells being connected in series in such a manner that a first terminal of the k+1th battery cell is connected to a second terminal of the kth battery cell, where k is a positive integer less than n, the equalization device comprising:
a plurality of equalization switches, each equalization switch being provided for a corresponding one of the plurality of battery cells, each equalization switch having energization terminals, control terminals, and a threshold voltage, a current path between the energization terminals being interposed between the first terminal and the second terminal of the corresponding battery cell, the current path conducting when a control voltage not less than the threshold voltage is applied between the control terminals; a plurality of resistors, each resistor being connected between the control terminals of a corresponding one of the plurality of equalization switches; and a control circuit that switches an equalization execution state and an equalization stop state in accordance with an equalization signal provided for each battery cell, wherein in the equalization execution state, the control circuit generates the control voltage not less than the threshold voltage by passing an electric current through the resistor provided for the battery cell corresponding to the equalization signal, and in the equalization stop state, the control circuit causes the resistor provided for the battery cell corresponding to the equalization signal to generate the control voltage less than the threshold voltage. |
