Winding shaft, cell manufacturing apparatus, and cell manufacturing method

Patent metadata

Field	Value
Publication number	US-12002919-B2
Application number	US-202318353896-A
Country	US
Kind code	B2
Filing date	Jul 18, 2023
Priority date	Jul 16, 2021
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

Provided are a winding shaft, a cell manufacturing apparatus, and a cell manufacturing method. The winding shaft is used for winding plates and includes: a winding shaft body including a first winding surface; an adjustment member configured to be mounted to the winding shaft body and movable simultaneously in an axial direction of the winding shaft and in a radial direction of the winding shaft, where the adjustment member includes a second winding surface, and the first winding surface and the second winding surface are configured to wind the plates jointly; and an actuator configured to drive the adjustment member to move to change a relative position of the second winding surface with respect to the first winding surface, so as to change a winding circumference of the winding shaft. The winding shaft of the present application can reduce the possibility of or the amount of misalignment between the tabs.

First claim

The invention claimed is:

1. A winding shaft, used for winding plates and comprising:
a winding shaft body comprising a first winding surface;
an adjustment member configured to be mounted on the winding shaft body and movable simultaneously in an axial direction of the winding shaft and in a radial direction of the winding shaft, wherein the adjustment member comprises a second winding surface, and the first winding surface and the second winding surface are configured to wind the plates jointly; and
an actuator configured to drive the adjustment member to move to change a relative position of the second winding surface with respect to the first winding surface to change a winding circumference of the winding shaft; and, wherein the winding shaft body comprises an accommodating portion, the accommodating portion comprising an opening located in the first winding surface, at least part of the adjustment member being arranged in the accommodating portion through the opening, wherein the actuator is configured to drive the adjustment member to extend out of or retract into the accommodating portion; and
the winding shaft further comprises a guide rail, the guide rail is arranged at the accommodating portion, the guide rail extends in an axial direction of the winding shaft and intersects with the axial direction of the winding shaft, and the adjustment member is movably connected to the guide rail.

2. The winding shaft according to claim 1 , wherein the accommodating portion comprises an inclined surface intersecting with the axial direction of the winding shaft, and the adjustment member is arranged at the inclined surface.

3. The winding shaft according to claim 1 , wherein the actuator is movably connected to the winding shaft body in the axial direction of the winding shaft, the actuator is connected to an end of the adjustment member in the axial direction of the winding shaft, and the actuator is configured to apply a driving force to the adjustment member in the axial direction of the winding shaft.

4. The winding shaft according to claim 1 , further comprising an elastic member, wherein the elastic member is for connecting the winding shaft body and the adjustment member, and the elastic member is configured to be compressed or stretched to apply an acting force to the adjustment member in the axial direction of the winding shaft and/or the radial direction of the winding shaft.

5. The winding shaft according to claim 4 , wherein the adjustment member comprises a first end and a second end that are opposite each other in the axial direction of the winding shaft;
wherein in the axial direction of the winding shaft, at least part of the elastic member is located between the first end and the winding shaft body, the actuator is connected to the second end, the elastic member is compressed or released during movement of the adjustment member, and the elastic member is configured to apply an acting force to the adjustment member in the axial direction of the winding shaft during movement of the adjustment member; or
in the axial direction of the winding shaft, at least part of the elastic member is located between the second end and the winding shaft body, the actuator is connected to the second end, the elastic member is stretched or released during movement of the adjustment member, and the elastic member is configured to apply an acting force to the adjustment member in the axial direction of the winding shaft during movement of the adjustment member.

6. The winding shaft according to claim 1 , wherein the winding shaft body comprises a first half shaft and a second half shaft, the first half shaft and the second half shaft are arranged side by side in the radial direction of the winding shaft, at least one said adjustment member is arranged at the first half shaft and/or at least one said adjustment member is arranged at the second half shaft.

7. A cell manufacturing apparatus, comprising:
the winding shaft according to claim 1 ; and
a driving device configured to drive the adjustment member by means of the actuator, to move the adjustment member simultaneously in the axial direction of the winding shaft and the radial direction of the winding shaft.

8. The cell manufacturing apparatus according to claim 7 , wherein the driving device comprises a base, a driver and an adapter, the driver and the adapter are arranged on the base, and the driver drives the adjustment member by means of the adapter.

9. The cell manufacturing apparatus according to claim 8 , further comprising a translation device, wherein the translation device comprises a rail and a deployment assembly, the base is movably connected to the rail, and the deployment assembly is configured to drive the base to move translationally along the rail so as to cause the adapter to move toward or away from the adjustment member.

10. The cell manufacturing apparatus according to claim 8 , further comprising a tab detection sensor and a winding shaft angle gauge, wherein the tab detection sensor is arranged upstream of the winding shaft, and the winding shaft angle gauge is configured to obtain a corresponding rotation angle of the winding shaft when the tab detection sensor detects an entry of an i th tab into the winding shaft, i being an integer greater than or equal to 1.

11. A cell manufacturing method, comprising:
providing a winding shaft, wherein the winding shaft comprises a winding shaft body, an adjustment member and an actuator, the winding shaft body comprises a first winding surface, the adjustment member is configured to be mounted on the winding shaft body and movable simultaneously in an axial direction of the winding shaft and in a radial direction of the winding shaft, the adjustment member comprises a second winding surface, the first winding surface and the second winding surface are configured to wind plates jointly, and the plates comprise tabs; and obtaining a magnitude of misalignment between adjacent tabs of i tabs wound around the winding shaft, wherein i≥2;
obtaining a maximum value from the magnitudes of misalignment, and computing a winding circumference adjustment amount of the winding shaft according to the maximum value; and
driving the adjustment member to move by means of the actuator according to the winding circumference adjustment amount to change a relative position of the second winding surface with respect to the first winding surface, so as to adjust a winding circumference of the winding shaft.

12. The cell manufacturing method according to claim 11 , wherein the winding circumference adjustment amount ΔL is: ΔL=KX/Z, wherein X is the maximum value, Z is the number of turns of a sheet wound around the winding shaft, wherein K is a tab misalignment adjustment factor, and 0.2<K<1.

13. A cell manufacturing method, comprising:
providing a winding shaft, wherein the winding shaft comprises a winding shaft body, an adjustment member and an actuator, the winding shaft body comprises a first winding surface, the adjustment member is configured to be mounted on the winding shaft body and movable simultaneously in an axial direction of the winding shaft and in a radial direction of the winding shaft, the adjustment member comprises a second winding surface, the first winding surface and the second winding surface are configured to wind plates jointly, and the plates comprise tabs; and obtaining a magnitude of misalignment between adjacent tabs in an n th cell wound around the winding shaft, wherein n≥1;
obtaining a maximum value from the magnitudes of misalignment;
computing a winding circumference adjustment amount of the winding shaft according to the maximum value

Assignees

• Jiangsu Contemporary Amperex Tech Ltd

Inventors

• Zhang Xiaowei
• Lin Jiang
• Tang Minghao
• Lin Wenfa
• Cui Zhenqiang
• Zhang Shengwu

Classifications

• H01M10/0409 Primary

  for cells with wound electrodes · CPC title

• B65H75/2484

  movable actuator including wedge-like or lobed member · CPC title

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• B65H2511/212

  Rotary position · CPC title

• B65H2511/416

  of material · CPC title