Winding shaft structure and winding apparatus

Patent metadata

Field	Value
Publication number	US-11996508-B2
Application number	US-202318326322-A
Country	US
Kind code	B2
Filing date	May 31, 2023
Priority date	Sep 17, 2021
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A winding shaft structure includes a winding shaft holder rotatable around an axial direction of the winding shaft structure, a first shaft group connected to one side of the winding shaft holder in the axial direction and configured to rotate together with the winding shaft holder, a second shaft group disposed on a side of the first shaft group in a radial direction of the winding shaft structure, a connecting member connected between the first shaft group and the second shaft group such that the second shaft group is movable with respect to the first shaft group in the radial direction via the connecting member, and a piezoelectric adjustment member disposed between the first shaft group and the second shaft group and deformable in the radial direction to adjust a distance between the first shaft group and the second shaft group.

First claim

What is claimed is:

1. A winding shaft structure, comprising:
a winding shaft holder, rotatable around an axial direction of the winding shaft structure;
a first shaft group, connected to one side of the winding shaft holder in the axial direction and configured to rotate together with the winding shaft holder;
a second shaft group, disposed on one side of the first shaft group in a radial direction of the winding shaft structure;
a connecting member, connected between the first shaft group and the second shaft group, wherein the second shaft group is movable with respect to the first shaft group in the radial direction via the connecting member; and
a piezoelectric adjustment member, disposed between the first shaft group and the second shaft group, wherein the piezoelectric adjustment member is deformable in the radial direction to adjust a distance between the first shaft group and the second shaft group;
wherein:
the first shaft group has a first surface on a side facing towards the second shaft group and recessing to form a first connecting hole, the first connecting hole is a step-like hole and comprises a recess;
the second shaft group has a second surface on a side facing towards the first shaft group and having a second connecting hole running through in the radial direction and communicating with the first connecting hole; and
the connecting member comprises:
a connecting rod, configured to run through the first connecting hole and the second connecting hole;
a stopping part, disposed on a side of the connecting rod away from the first shaft group, the recess being on a side of the stopping part facing towards the first surface; and
a resetting member stopped between the stopping part and the recess, the resetting member providing a reset force in the radial direction.

2. The winding shaft structure according to claim 1 , wherein:
the connecting member is one of at least two connecting members;
the first shaft group comprises at least two inner shafts, wherein the at least two inner shafts are distributed around an axis extending in the axial direction and the winding shaft holder is rotatable around the axis; and
the second shaft group comprises at least two outer shafts, wherein the outer shafts are each disposed on a side of the respective inner shaft away from the axis, each of the outer shafts is connected to a corresponding one of the at least two inner shafts via a corresponding one of the at least two connecting members, and the piezoelectric adjustment member is disposed between each of the outer shafts and the corresponding inner shaft.

3. The winding shaft structure according to claim 1 , wherein:
at least one of the first surface or the second surface recesses to form an accommodating chamber, and at least part of the piezoelectric adjustment member is disposed in the accommodating chamber.

4. The winding shaft structure according to claim 3 , wherein:
the second surface recesses to form the accommodating chamber; and
the first shaft group comprises a mounting hole running through in the radial direction and a mounting boss disposed in the mounting hole, wherein the mounting hole communicates with the accommodating chamber, the mounting boss is formed by the first shaft group protruding towards an inner surface of the mounting hole, and the piezoelectric adjustment member is disposed on the mounting boss.

5. The winding shaft structure according to claim 3 , wherein the second shaft group has a locking hole in communication with the accommodating chamber and the piezoelectric adjustment member is connected to the second shaft group via the locking hole.

6. The winding shaft structure according to claim 1 , further comprising:
a spacer disposed between the piezoelectric adjustment member and the second shaft group;
wherein the piezoelectric adjustment member drives, via the spacer, the second shaft group to move in the radial direction.

7. The winding shaft structure according to claim 1 , further comprising:
a distance sensor configured to obtain the distance between the first shaft group and the second shaft group in the radial direction.

8. The winding shaft structure according to claim 7 , wherein the distance sensor comprises a sensing piece and a receiver, one of the sensing piece and the receiver is disposed at the second shaft group and another one of the sensing piece and the receiver is disposed at the winding shaft holder.

9. The winding shaft structure according to claim 1 , further comprising:
a first connecting lead, connected to the piezoelectric adjustment member;
a second connecting lead, configured to connect an external electric device; and
an electric slip ring, connecting the first connecting lead and the second connecting lead so that the first connecting lead is rotatable around the axis with respect to the second connecting lead via the slip ring structure.

10. A winding apparatus, comprising:
a detection component, configured to detect misalignment information of an electrode plate;
a winding shaft structure, comprising:
a winding shaft holder, rotatable around an axial direction of the winding shaft structure;
a first shaft group, connected to one side of the winding shaft holder in the axial direction and configured to rotate together with the winding shaft holder;
a second shaft group, disposed on one side of the first shaft group in a radial direction of the winding shaft structure;
a connecting member, connected between the first shaft group and the second shaft group, wherein the second shaft group is movable with respect to the first shaft group in the radial direction via the connecting member; and
a piezoelectric adjustment member, disposed between the first shaft group and the second shaft group, wherein the piezoelectric adjustment member is deformable in the radial direction to adjust a distance between the first shaft group and the second shaft group;
wherein:
the first shaft group has a first surface on a side facing towards the second shaft group and recessing to form a first connecting hole, the first connecting hole is a step-like hole and comprises a recess;
the second shaft group has a second surface on a side facing towards the first shaft group and having a second connecting hole running through in the radial direction and communicating with the first connecting hole; and
the connecting member comprises:
a connecting rod, configured to run through the first connecting hole and the second connecting hole;
a stopping part, disposed on a side of the connecting rod away from the first shaft group, the recess being on a side of the stopping part facing towards the first surface; and
a resetting member stopped between the stopping part and the recess, the resetting member providing a reset force in the radial direction; and

a processing component, communicatively connected to the detection component and the piezoelectric adjustment member, and configured to control deformation of the piezoelectric adjustment member based on the misalignment information.

11. The winding apparatus according to claim 10 , wherein the detection component comprises at least one of:
a first detection part, configured to detect the misalignment information of the electrode plate; or
a second detection part, configured to:
detect thickness information of at least one of the electrode plate or a separator that are being wound by the winding apparatus to form a cell; and
verify the misalignment information based on the thickness information.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Zhang Xiaowei
• Ni Jun
• Wang Zhiwen
• Wen Yuqian
• Tang Minghao
• Xie Chao

Classifications

• H01M10/0409 Primary

  for cells with wound electrodes · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title