Wound-type cell
AssigneeNingde Amperex Technology Limited
InventorsQiao Zeng, Kefei Wang, Jiacai Cai, Yu Luo
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Abstract
A wound-type cell includes a first electrode plate; a second electrode plate; a separator, disposed between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate, in which the separator includes a third winding start end, the third winding start end is folded back to an inner side in a thickness direction and is disposed between the first electrode tab and the second electrode tab in a length direction.
Claims18
A wound-type cell, comprising:
- a first electrode plate;
- a second electrode plate;
- a separator, disposed between the first electrode plate and the second electrode plate;
- a first electrode tab electrically connected to the first electrode plate;
- and
- a second electrode tab electrically connected to the second electrode plate;
- wherein
- the first electrode tab and the second electrode tab are positioned on a same side relative to a central line of the wound-type cell, the first electrode tab is electrically connected to one surface of the first electrode plate facing away from the central line of the wound-type cell, the second electrode tab is electrically connected to one surface of the second electrode plate facing away from the central line of the wound-type cell, and the central line is perpendicular to a thickness direction of the wound-type cell;
- and
- the separator comprises a third winding start end having a U-shaped portion, the U-shaped portion of the third winding start end is folded back to an inner side towards the central line of the wound-type cell in a slant angle relative to the thickness direction and is disposed between the first electrode tab and the second electrode tab in a length direction of the wound-type cell.
A wound-type cell, comprising:
- a first electrode plate;
- a second electrode plate;
- a separator, disposed between the first electrode plate and the second electrode plate;
- a first electrode tab electrically connected to the first electrode plate;
- and
- a second electrode tab electrically connected to the second electrode plate;
- wherein
- the first electrode tab and the second electrode tab are positioned on a same side relative to a central line of the wound-type cell, and the central line is perpendicular to a thickness direction of the wound-type cell;
- and
- the separator comprises a third winding start end having a U-shaped portion, the U-shaped portion of the third winding start end is folded back to an inner side towards the central line of the wound-type cell in the thickness direction and is disposed between the first electrode tab and the second electrode tab in a length direction of the wound-type cell and the U-shaped portion of the third winding start end has a tilted acute angle between 20 degrees and 70 degrees relative to an inner end of the second electrode plate near the central line of the wound-type cell.
Dependencies are inferred from the claim text.