Electrode assembly having stepped portion, as well as battery cell, battery pack, and device including the electrode assembly

摘要

There is provided an electrode assembly. The electrode assembly includes a stack of unit cells respectively including at least one negative electrode and at least one positive electrode, alternately stacked, wherein at least one separator is placed on each of both sides of the electrodes, and at least one of the unit cells has an area different from that of an adjacent unit cell to form at least one stepped portion on the electrode assembly. In addition, there are also provided a battery cell, a battery pack, and a device that include the electrode assembly.

主权项

1. An electrode assembly comprising a stack of unit cells, each of the unit cells comprising at least one negative electrode and at least one positive electrode, alternately stacked in a stacking direction,
wherein at least one separator is located on each of both sides of the electrodes, and at least one of the unit cells has an area different from that of an adjacent one of the unit cells to define a first stepped portion of the electrode assembly, the electrode assembly further comprising at least one single electrode having negative or positive polarity, the single electrode disposed along an upper surface or a lower surface of the electrode assembly in the stacking direction, such that the single electrode is adjacent to a first one of the unit cells, and the single electrode having an area different from that of the first unit cell so as to define a second stepped portion of the electrode assembly.