Method, device, and system for detecting size of battery composite surface

Patent metadata

Field	Value
Publication number	US-12444071-B2
Application number	US-202418592881-A
Country	US
Kind code	B2
Filing date	Mar 1, 2024
Priority date	Apr 6, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A dimension detection method for a battery composite surface includes: acquiring image information of a cathode sheet, the image information including an image of a first surface of the cathode sheet and an image of a second surface opposite to the first surface; acquiring image information of a composite sheet which includes a non-composite surface and a composite surface, the non-composite surface being formed by compounding the first surface of the cathode sheet, an anode, and a separator, the composite surface being formed by compounding the second surface of the cathode sheet, the anode, and the separator, and the image information of the composite sheet including image information of the non-composite surface; and calculating dimension information of the composite surface by an image processing algorithm, according to the image information of the cathode sheet and the image information of the composite sheet.

First claim

What is claimed is:

1. A dimension detection method for a composite surface of a battery, comprising:
acquiring image information of a cathode sheet, wherein the image information of the cathode sheet comprises an image of a first surface of the cathode sheet and an image of a second surface opposite to the first surface;
acquiring image information of a composite sheet, wherein the composite sheet comprises a non-composite surface and the composite surface, the non-composite surface is formed by compounding the first surface of the cathode sheet, an anode and a separator, the composite surface is formed by compounding the second surface of the cathode sheet, the anode and the separator, and the image information of the composite sheet comprises image information of the non-composite surface; and
calculating, through an image processing algorithm, dimension information of the composite surface according to the image information of the cathode sheet and the image information of the composite sheet, wherein the dimension information of the composite surface comprises a distance from a cathode edge to an anode edge in the composite surface, and calculating the dimension information of the composite surface comprises:
calculating, through the image processing algorithm, misalignment amount according to the image of the first surface of the cathode sheet and the image of the second surface, wherein the misalignment amount indicates a difference between a distance from a cathode edge to a ceramic edge of the first surface of the cathode sheet and a distance from a cathode edge to a ceramic edge of the second surface of the cathode sheet;
calculating a distance from a cathode edge to an anode edge in the non-composite surface according to the image information of the composite sheet; and
calculating the distance from the cathode edge to the anode edge in the composite surface according to the misalignment amount and the distance from the cathode edge to the anode edge in the non-composite surface.

2. The method according to claim 1 , wherein calculating through the image processing algorithm misalignment amount according to the image of the first surface of the cathode sheet and the image of the second surface comprises:
identifying and calculating, through the image processing algorithm, a first distance from the cathode edge to the ceramic edge of the first surface of the cathode sheet according to the image of the first surface of the cathode sheet;
identifying and calculating a second distance from the cathode edge to the ceramic edge of the second surface of the cathode sheet according to the image of the second surface of the cathode sheet; and
calculating a difference between the first distance and the second distance to obtain the misalignment amount.

3. The method according to claim 2 , wherein identifying and calculating through the image processing algorithm the first distance from the cathode edge to the ceramic edge of the first surface of the cathode sheet according to the image of the first surface of the cathode sheet comprises:
identifying the cathode edge and the ceramic edge in the image of the first surface of the cathode sheet through the image recognition algorithm; and
calculating a distance from the identified cathode edge to the ceramic edge to obtain the first distance.

4. The method according to claim 1 , wherein:
the image information of the composite sheet comprises multiple composite sheet images, each of the composite sheet images comprises one corner of the composite sheet, and different composite sheet images contain different corners of the composite sheet;
calculating the distance from the cathode edge to the anode edge in the non-composite surface according to the image information of the composite sheet comprises:
calculating, according to the each composite sheet image, the distance from the cathode edge to the anode edge in the non-composite surface in a corresponding comprises sheet image; and

calculating the distance from the cathode edge to the anode edge in the composite surface according to the misalignment amount and the distance from the cathode edge to the anode edge in the non-composite surface comprises:
calculating a difference between the misalignment amount and the distance from the cathode edge to the anode edge of the non-composite surface corresponding to the each composite sheet image, and obtaining the distance from the cathode edge to the anode edge of the composite surface in the each composite sheet image.

5. The method according to claim 1 , further comprising, after calculating through the image processing algorithm the dimension information of the composite surface according to the image information of the cathode sheet and the image information of the composite sheet:
judging whether the dimension information of the composite surface satisfies a preset standard; and
generating a re-inspection reminder of the composite sheet when the dimension information of the composite surface does not meet the preset standard.

6. The method according to claim 1 , wherein:
acquiring the image information of the cathode sheet comprises:
controlling a first camera and a second camera to shoot the first surface and the second surface of the cathode sheet to obtain the image of the first surface of the cathode sheet and the image of the second surface opposite to the first surface;

positions where the first camera and the second camera are provided comprise: two sides of a cathode sheet conveying device.

7. The method according to claim 1 , wherein acquiring the image information of the composite sheet comprises:
acquiring a serial number of the cathode sheet;
determine number of a to-be-triggered camera module according to the serial number of the cathode sheet; and
controlling, according to the number of the to-be-triggered camera module, a corresponding camera module to shoot the composite sheet to obtain multiple composite sheet images, wherein multiple groups of camera modules are provided, and the multiple groups of camera modules are provided at two sides of a composite sheet conveying device, the numbers of the camera modules corresponding to the different groups of cameral modules are different, and each groups of camera modules comprises at least two third cameras.

8. An electronic device, comprising:
a processor; and
a memory storing computer programs that, when executed by the processor, cause the processor to implement the method according to claim 1 .

9. A non-transitory computer-readable storage medium storing computer programs that, when executed by a processor, cause the method according to claim 1 to be implemented.

10. A dimension detection device for a composite surface of a battery, comprising:
an acquisition module configured to:
acquire image information of a cathode sheet, wherein the image information of the cathode sheet comprises an image of a first surface of the cathode sheet and an image of a second surface opposite to the first surface; and
acquire image information of a composite sheet, wherein the composite sheet comprises a non-composite surface and a composite surface, the non-composite surface is formed by compounding the first surface of the cathode sheet, an anode and a separator, the composite surface is formed by compounding the second surface of the cathode sheet, the anode and the separator, and the image information of the composite sheet comprises image information of the non-composite surface; and

an image processing module configured to calculate, through an image processing algorithm, dimension information of the composite surface according to the image information of the cathode sheet and the i

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Duan Pengfei
• Ni Dajun
• Hu Jun
• Li Hongyuan
• Feng Shiping

Classifications

• G06T7/001

  using an image reference approach · CPC title

• H04N23/60

  Control of cameras or camera modules · CPC title

• H04N23/90

  Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums · CPC title

• G06T7/337

  involving reference images or patches · CPC title

• G06T7/13

  Edge detection · CPC title