Electrode assembly, battery cell, battery, and electrical apparatus

An electrode assembly comprising:

• a first electrode sheet and a second electrode sheet having opposite polarities;
• and
• a first separator configured to separate the first electrode sheet and the second electrode sheet;
• wherein:
• the first electrode sheet, the second electrode sheet, and the first separator are wound in a winding direction;
• the electrode assembly has a bending region, the bending region being provided with a second separator that is laminated with the first separator and configured to separate the first electrode sheet and the second electrode sheet adjacent to each other;
• at least part of ions deintercalated from the first electrode sheet are able to pass through the first separator and the second separator and be intercalated in the second electrode sheet;
• the second separator comprises a plurality of separation layers, the plurality of separation layers being laminated in a thickness direction of the second separator;
• and
• a material of the separation layers is same as a material of the first separator, and a thickness of one of the separation layers is equal to a thickness of the first separator.

An electrode assembly comprising:

• a first electrode sheet and a second electrode sheet having opposite polarities;
• and
• a first separator configured to separate the first electrode sheet and the second electrode sheet;
• wherein:
• the first electrode sheet, the second electrode sheet, and the first separator are wound in a winding direction;
• the electrode assembly has a bending region, the bending region being provided with a second separator that is laminated with the first separator and configured to separate the first electrode sheet and the second electrode sheet adjacent to each other;
• at least part of ions deintercalated from the first electrode sheet are able to pass through the first separator and the second separator and be intercalated in the second electrode sheet;
• and
• a porosity of the second separator is greater than or equal to a porosity of the first separator.