Detection method, terminal device, and computer-readable storage medium

Patent metadata

Field	Value
Publication number	US-12254610-B2
Application number	US-202318229330-A
Country	US
Kind code	B2
Filing date	Aug 2, 2023
Priority date	Dec 12, 2022
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A detection method includes acquiring a first shot image of a long-side weld of a battery cell under detection by using a first structured light camera on a long side of the battery cell under detection, acquiring a second shot image of a short-side weld of the battery cell under detection by using a second structured light camera on the short side of the battery cell under detection, detecting a defect of the long-side weld of the battery cell under detection based on the first shot image, and detecting a defect of the short-side weld of the battery cell under detection based on the second shot image.

First claim

What is claimed is:

1. A detection method, applied to a detection device, wherein the detection device comprises 2N first structured light cameras and 2M second structured light cameras, N first structured light cameras are disposed on each long side of a battery cell under detection, and M second structured light cameras are disposed on each short side of the battery cell under detection, wherein N and M are both positive integers; the N first structured light cameras on each long side of the battery cell under detection are mounted symmetrically about an axis that is a long-side perpendicular bisector of the battery cell under detection; and the M second structured light cameras on each short side of the battery cell under detection are mounted symmetrically about an axis that is a short-side perpendicular bisector of the battery cell under detection; the detection method comprising:
acquiring a first shot image of a long-side weld of the battery cell under detection by using a first structured light camera on the long side of the battery cell under detection;
acquiring a second shot image of a short-side weld of the battery cell under detection by using a second structured light camera on the short side of the battery cell under detection;
detecting a defect of the long-side weld of the battery cell under detection based on the first shot image; and
detecting a defect of the short-side weld of the battery cell under detection based on the second shot image;
when N is an integer greater than 1, acquiring the first shot image of the long-side weld of the battery cell under detection by using the first structured light camera on the long side of the battery cell under detection comprises:
controlling, for each long side of the battery cell under detection, at least one first camera among the N first structured light cameras on the long side to expose simultaneously, so as to acquire a first shot image captured by the first camera, wherein fields-of-view do not overlap between the first cameras;
controlling, after acquiring the first shot image captured by the first camera, at least one second camera among the N first structured light cameras on the long side to expose simultaneously, so as to acquire a first shot image captured by the second camera, wherein fields-of-view do not overlap between the second cameras, and the second camera is a structured light camera other than the first camera among the N first structured light cameras on the long side;
controlling a third camera and a fourth camera among the 2N first structured light cameras of the detection device to expose simultaneously, wherein the third camera and the fourth camera are located on different long sides of the battery cell under detection respectively, and a mounting position of the third camera is not symmetric to a mounting position of the fourth camera around the short-side perpendicular bisector of the battery cell under detection; and
controlling, after acquiring the first shot image captured by the third camera and the first shot image captured by the fourth camera, a fifth camera and a sixth camera to expose simultaneously, wherein the fifth camera and the sixth camera are located on different long sides of the battery cell under detection respectively, a mounting position of the fifth camera is not symmetric to a mounting position of the sixth camera around the short-side perpendicular bisector of the battery cell under detection, and the fifth camera and the sixth camera are the first structured light cameras other than the third camera and the fourth camera.

2. The detection method according to claim 1 , wherein, when N is equal to 2, the detection device comprises 4 first structured light cameras, and 2 first structured light cameras are disposed on each long side of the battery cell under detection; and
acquiring the first shot image of the long-side weld of the battery cell under detection by using the first structured light camera on the long side of the battery cell under detection comprises:
controlling a seventh camera and an eight camera among the 4 first structured light cameras of the detection device to expose simultaneously, wherein the seventh camera and the eighth camera are located on different long sides of the battery cell under detection respectively and located on two sides of the long-side perpendicular bisector of the battery cell under detection respectively; and
controlling, after acquiring the first shot image captured by the seventh camera and the first shot image captured by the eighth camera, a ninth camera and a tenth camera among the 4 first structured light cameras of the detection device to expose simultaneously, so as to acquire a first shot image captured by the ninth camera and a first shot image captured by the tenth camera, wherein the ninth camera and the tenth camera are located on different long sides of the battery cell under detection respectively and located on the two sides of the long-side perpendicular bisector of the battery cell under detection respectively, and the ninth camera and the tenth camera are the first structured light cameras other than the seventh camera and the eighth camera.

3. A terminal device, comprising:
a memory storing a computer program; and
a processor configured to execute the computer program to implement the detection method according to claim 1 .

4. A computer-readable storage medium, storing a computer program that, when executed by a processor, causes the processor to implement the detection method according to claim 1 .

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Ma Lin
• Shen Ziyang
• Zhang Zhipeng
• Jiang Ping
• Lu Gaofeng

Classifications

• H04N23/73

  by influencing the exposure time · CPC title

• B23K31/125

  Weld quality monitoring · CPC title

• H01M10/42

  Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence) · CPC title

• H04N23/951 Primary

  by using two or more images to influence resolution, frame rate or aspect ratio · CPC title

• H01M50/169

  by welding, brazing or soldering · CPC title