Winding needle assembly and winding device

A winding device, comprising:

• a winding needle assembly, the winding needle assembly comprising:
• a first winding needle;
• and
• a second winding needle, wherein the first winding needle and the second winding needle are configured to clamp a separator, and the second winding needle comprises a rolling member on a side of the second winding needle toward the first winding needle;
• and
• a driving mechanism configured to drive the winding needle assembly to rotate,
• wherein the rolling member comprises:
• a fixed shaft with two ends, each of the two ends fixed to the second winding needle;
• and
• a rolling body rotatably connected to the fixed shaft.

A winding needle assembly, comprising

• a first winding needle;
• and
• a second winding needle, wherein the first winding needle and the second winding needle are configured to clamp a separator, and the second winding needle comprises a rolling member on a side of the second winding needle toward the first winding needle,
• wherein both a side of the second winding needle toward the first winding needle and a side of the first winding needle toward the second winding needle are planar,
• wherein at least a portion of the rolling member protrudes from the side of the second winding needle toward the first winding needle,
• wherein a first groove is provided on the side of the first winding needle toward the second winding needle, and the first groove is configured to avoid the rolling member.