Laminated cell, prismatic lithium battery and battery pack

A prismatic lithium battery, wherein the prismatic lithium battery comprises one or more laminated cells, each of the one or more laminated cells comprises a plurality of cell units stacked in sequence along a first direction, each of the cell units comprises a positive electrode plate, a separator and a negative electrode plate that are stacked in sequence, and a separator is disposed between two adjacent ones of the cell units, the first direction is perpendicular to a first surface of the positive electrode plate close to the separator, the positive electrode plate of each of the cell units is provided with a sub-tab, and the negative electrode plate of each of the cell units is provided with a sub-tab;

• a plurality of sub-tabs of a plurality of positive electrode plates of the plurality of cell units are connected in sequence to form a positive electrode tab, and a plurality of sub-tabs of a plurality of negative electrode plates of the plurality of cell units are connected in sequence to form a negative electrode tab;
• and
• wherein a ratio of a length to a thickness of the positive electrode plate and a ratio of a length to a thickness of the negative electrode plate are respectively and independently selected from 6.3×102 to 9.4×102, and a ratio of a width to the thickness of the positive electrode plate and a ratio of a width to the thickness of the negative electrode plate are respectively and independently selected from 6.3×102 to 9.4×102.

A battery pack, wherein the battery pack comprises a box and a plurality of prismatic lithium batteries, the box is provided with an accommodating space, and the plurality of prismatic lithium batteries are arranged in sequence in the accommodating space;

• wherein each of the prismatic lithium batteries comprises one or more laminated cells, each of the one or more laminated cells comprises a plurality of cell units stacked in sequence along a first direction, each of the cell units comprises a positive electrode plate, a separator and a negative electrode plate that are stacked in sequence, and a separator is disposed between two adjacent ones of the cell units, the first direction is perpendicular to a first surface of the positive electrode plate close to the separator, the positive electrode plate of each of the cell units is provided with a sub-tab, and the negative electrode plate of each of the cell units is provided with a sub-tab;
• a plurality of sub-tabs of a plurality of positive electrode plates of the plurality of cell units are connected in sequence to form a positive electrode tab, and a plurality of sub-tabs of a plurality of negative electrode plates of the plurality of cell units are connected in sequence to form a negative electrode tab;
• and
• wherein a ratio of a length to a thickness of the positive electrode plate and a ratio of a length to a thickness of the negative electrode plate are respectively and independently selected from 6.3×102 to 9.4×102, and a ratio of a width to the thickness of the positive electrode plate and a ratio of a width to the thickness of the negative electrode plate are respectively and independently selected from 6.3×102 to 9.4×102.