Pole piece labeling control method and device, electronic equipment, and storage medium

Patent metadata

Field	Value
Publication number	US-2024199267-A1
Application number	US-202318362330-A
Country	US
Kind code	A1
Filing date	Jul 31, 2023
Priority date	Dec 15, 2022
Publication date	Jun 20, 2024
Grant date	—

Abstract

Disclosed are a pole piece labeling control method and device, electronic equipment, and a storage medium. The method includes: acquiring a pole piece image, including a pole piece mark hole image, of a target pole piece; determining a defect detection result according to the pole piece image; determining a first distance according to the pole piece mark hole image; determining a second distance according to the first distance; determining a labeling delay of the target pole piece according to the second distance; and controlling the labeling of the target pole piece according to the labeling delay and the defect detection result. The real-time position of the pole piece transferred on a compression roller is identified through the pole piece mark hole image, so that the accuracy of the labeling delay is improved, and the labeling position based on the labeling delay is more accurate.

First claim

What is claimed is:

1 . A method for pole piece labeling control, comprising:
acquiring a pole piece image of a target pole piece, wherein the pole piece image comprises a pole piece mark hole image; determining a defect detection result according to the pole piece image; determining a first distance according to the pole piece mark hole image, wherein the first distance characterizes a distance from a mark hole in the pole piece mark hole image to an image edge, close to a labeling position, of the pole piece mark hole image; determining a second distance according to the first distance, wherein the second distance comprises a distance from the mark hole in the pole piece mark hole image to the labeling position; determining a labeling delay of the target pole piece according to the second distance; and controlling labeling of the target pole piece according to the labeling delay and the defect detection result.

2 . The method according to claim 1 , wherein determining the second distance according to the first distance comprises:
acquiring a third distance between a first camera and the labeling position, wherein the first camera is a camera that shoots the pole piece image of the target pole piece; and determining the second distance according to the third distance and the first distance.

3 . The method according to claim 2 , wherein determining the second distance according to the third distance and the first distance comprises:
acquiring a length of the pole piece image; and determining the second distance according to the third distance, the first distance, and the length of the pole piece image.

4 . The method according to claim 3 , wherein determining the second distance according to the third distance, the first distance, and the length of the pole piece image comprises:
calculating the second distance L 2 according to a first formula,
wherein the first formula is:

L
⁢
2

=

L
⁢
3

-

2
*
L
⁢
0

+

L
⁢
1

,

wherein L 1 is the first distance, L 2 is the second distance, L 3 is the third distance, L 0 is a length distance of the pole piece image in a pole piece transporting direction, and the labeling delay is generated when the first camera completes collection of a next image of the pole piece mark hole image.

5 . The method according to claim 1 , wherein determining the labeling delay of the target pole piece according to the second distance comprises:
acquiring a camera frequency division parameter, a camera frequency multiplication parameter, and a visual detection precision; and determining the labeling delay of the target pole piece according to the second distance, the camera frequency division parameter, the camera frequency multiplication parameter, and the visual detection precision.

6 . The method according to claim 5 , wherein determining the labeling delay of the target pole piece according to the second distance, the camera frequency division parameter, the camera frequency multiplication parameter, and the visual detection precision comprises:
calculating the labeling delay X according to a second formula, wherein the second formula is:

X
=

(

L
⁢
2
*
U

)

/

(

P
*
M

)

,

wherein L 2 is the second distance, U is the camera frequency division parameter, M is the camera frequency multiplication parameter, and P is the visual detection precision.

7 . The method according to claim 1 , wherein controlling labeling of the target pole piece according to the labeling delay and the defect detection result comprises:
under a condition that the defect detection result shows that the target pole piece has defects, controlling a labeling machine at the labeling position to label the target pole piece after the labeling delay, so that the target pole piece is cut according to the labeling in a winding stage of a cell.

8 . The method according to claim 1 , wherein determining the defect detection result according to the pole piece image comprises:
detecting whether a pole piece image having defects on the target pole piece is present in the pole piece image or not; under a condition that the pole piece image having defects on the target pole piece is present in the pole piece image, determining whether the pole piece image having defects is the pole piece mark hole image or not; and under a condition that the pole piece image having defects is the pole piece mark hole image, determining the defect detection result of the target pole piece according to a defect position in the pole piece mark hole image.

9 . The method according to claim 8 , wherein determining the defect detection result of the target pole piece according to the defect position in the pole piece mark hole image comprises:
determining whether a distance from the defect position to a first edge of the pole piece mark hole image is greater than that from the mark hole to the first edge or not, wherein the first edge is an image edge, close to a laser, of the pole piece mark hole image; under a condition that it is determined that the distance from the defect position to the first edge of the pole piece mark hole image is greater than that from the mark hole to the first edge, generating a defect detection result that the target pole piece has no defect and a previous pole piece of the target pole piece has defects; and under a condition that it is determined that the distance from the defect position to the first edge of the pole piece mark hole image is not greater than the distance from the mark hole to the first edge, generating a defect detection result that the target pole piece has defects.

10 . The method according to claim 8 , wherein after detecting whether a pole piece image having defects on the target pole piece is present in the pole piece image or not, the method further comprises:
under a condition that it is determined that the pole piece image having defects on the target polar piece is not present in the pole piece image, generating a defect detection result that the target pole piece has no defect.

11 . The method according to claim 8 , wherein after determining whether the pole piece image having defects is the pole piece mark hole image or not, the method further comprises:
under a condition that it is determined that the pole piece image having defects is not the pole piece mark hole image, generating a de

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Ma Lin
• Wu Chunxu
• Li Hongyuan
• Jiang Ping
• Lu Gaofeng

Classifications

• G06V2201/06

  Recognition of objects for industrial automation · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• G06T7/70

  Determining position or orientation of objects or cameras (camera calibration G06T7/80) · CPC title

• G06T7/13

  Edge detection · CPC title

• G06T7/00

  Image analysis · CPC title