Battery cell, battery, and electric apparatus

A battery cell, comprising:

• a packaging bag comprising a first portion and a second portion, wherein the second portion is connected to the first portion, and the second portion is recessed in a first direction with respect to the first portion to form a first concave portion on an outer surface of the packaging bag;
• and
• a first electrode plate and a second electrode plate that are accommodated within the packaging bag, wherein the first electrode plate comprises a first coating zone and a first tab connected to the first coating zone;
• the second electrode plate comprises a second coating zone, the second coating zone comprises a first zone and a second zone, and the second zone is recessed in the first direction with respect to the first zone to form a second concave portion on the second electrode plate;
• a second tab is connected to the first zone;
• and the first tab is connected to a first conductive member, the second tab is connected to a second conductive member, the first portion contains a first sealing portion, the second portion contains a second sealing portion, and the first conductive member and the second conductive member come out through the first sealing portion;
• wherein in an extending direction of the first tab, an orthographic projection of the first zone is located within a projection of the first portion;
• in the extending direction of the first tab, a dimension by which the first zone extends beyond the first electrode plate is denoted as a1, and a dimension by which the second zone extends beyond the first electrode plate is denoted as a2;
• and in the extending direction of the first tab, a distance from the second coating zone to the first portion is denoted as b1, and a distance from the second coating zone to the second portion is denoted as b2, satisfying:
• 0.2 mm≤a1−a2≤4 mm, 0.1 mm≤a2, 0.3 mm≤b1−b2≤7 mm, and b2≤3 mm;
• wherein the extending direction of the first tab is opposite to the first direction.