Method and device for controlling misalignment of electrode plates, electrode plates, electrochemical cell, and battery

Patent metadata

Field	Value
Publication number	US-12175707-B2
Application number	US-202418733897-A
Country	US
Kind code	B2
Filing date	Jun 5, 2024
Priority date	Jan 14, 2022
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

The present application discloses a method and device for controlling misalignment of electrode plates, electrode plates, an electrochemical cell, and a battery. The method includes: acquiring cut hole position information of an anode electrode plate, and calculating a first width deviation value corresponding to the anode electrode plate according to the cut hole position information and a calibration width of the anode electrode plate; acquiring tab position information of a cathode electrode plate, and calculating a second width deviation value corresponding to the cathode electrode plate according to the tab position information and a calibration width of the cathode electrode plate; and when the anode electrode plate and the cathode electrode plate are stacked, adjusting a feed position of the cathode electrode plate according to the first width deviation value, and compensating for a cut width of the cathode electrode plate according to the second width deviation value.

First claim

What is claimed is:

1. A method for controlling misalignment of electrode plates, comprising:
acquiring cut hole position information of an anode electrode plate, and calculating a first width deviation value corresponding to the anode electrode plate according to the cut hole position information and a calibration width of the anode electrode plate;
acquiring tab position information of a cathode electrode plate, and calculating a second width deviation value corresponding to the cathode electrode plate according to the tab position information and a calibration width of the cathode electrode plate; and
when the anode electrode plate and the cathode electrode plate are stacked, adjusting a feed position of the cathode electrode plate according to the first width deviation value, and compensating for a cut width of the cathode electrode plate according to the second width deviation value, such that a preset distance is kept between edges of the cathode electrode plate and the anode electrode plate overlapping with each other.

2. The method according to claim 1 , wherein the calculating a first width deviation value corresponding to the anode electrode plate according to the cut hole position information and a calibration width of the anode electrode plate comprises:
when a sensor detects a cut hole of the anode electrode plate, acquiring a detection width of a previous anode electrode plate adjacent to the anode electrode plate according to a distance between cut holes of the anode electrode plate and the previous anode electrode plate adjacent to the anode electrode plate, and calculating a width deviation value of the previous anode electrode plate according to the detection width and the calibration width of the anode electrode plate.

3. The method according to claim 2 , further comprising:
acquiring a calibration position deviation value corresponding to a calibration position of a cut hole photographed by a camera;
when the sensor does not detect the cut hole of the anode electrode plate and the currently detected anode electrode plate meets photographing conditions of the camera, acquiring a cut mark image of the currently detected anode electrode plate, and acquiring a detection width deviation value of the currently detected anode electrode plate according to the cut mark image; and
calculating a difference between the detection width deviation value and the calibration position deviation value, wherein the difference is a width deviation value of the currently detected anode electrode plate.

4. The method according to claim 3 , wherein the acquiring a calibration position deviation value corresponding to a calibration position of a cut hole photographed by a camera comprises:
when the sensor detects the cut hole of the anode electrode plate for a first time and the photographing conditions of the camera are met, acquiring a cut mark image corresponding to the cut hole, and acquiring the calibration position deviation value according to the cut mark image and a calibration position of the cut hole of the anode electrode plate.

5. The method according to claim 4 , wherein when the sensor detects the cut hole of the anode electrode plate for a first time, that the photographing conditions of the camera are met specifically comprises:
acquiring a first distance between the sensor and the camera;
acquiring position information of the cut hole of the anode electrode plate detected by the sensor for the first time, wherein the position information comprises a second distance; and
when a distance corresponding to position information of a cut hole photographed currently by the camera is equal to a sum of the first distance and the second distance, determining that the photographing conditions of the camera are met.

6. The method according to claim 3 , wherein when the sensor detects the cut hole of the anode electrode plate not for the first time, that the photographing conditions of the camera are met specifically comprises:
acquiring a cut mark image of a cut hole that is of a previously detected anode electrode plate and corresponds to the cut hole of the anode electrode plate, wherein the cut mark image of the cut hole of the previously detected anode electrode plate comprises a first cut mark distance;
acquiring a cut mark image of the cut hole of the anode electrode plate, wherein the cut mark image of the cut hole of the anode electrode plate comprises a second cut mark distance; and
when the second cut mark distance is equal to a sum of the first cut mark distance and the calibration width of the anode electrode plate, determining that the photographing conditions of the camera are met.

7. The method according to claim 1 , wherein the calculating a second width deviation value corresponding to the cathode electrode plate according to the tab position information and a calibration width of the cathode electrode plate comprises:
when the sensor detects tabs of the cathode electrode plate, recording position information of each of the tabs;
when a number of the tabs detected by the sensor is greater than a preset threshold, calculating an average width of a preset threshold number of the cathode electrode plates according to the recorded position information of the tabs; and
calculating a difference between the calibration width of the cathode electrode plate and the average width, wherein the difference is the width deviation value of the cathode electrode plate.

8. A device for controlling misalignment of electrode plates, comprising:
a first calculation module configured to acquire cut hole position information of an anode electrode plate and calculate a first width deviation value corresponding to the anode electrode plate according to the cut hole position information and a calibration width of the anode electrode plate;
a second calculation module configured to acquire tab position information of a cathode electrode plate and calculate a second width deviation value corresponding to the cathode electrode plate according to the tab position information and a calibration width of the cathode electrode plate; and
an electrode plate misalignment handling module configured to: when the anode electrode plate and the cathode electrode plate are stacked, adjust a feed position of the cathode electrode plate according to the first width deviation value, and compensate for a cut width of the cathode electrode plate according to the second width deviation value, such that a preset distance is kept between edges of the cathode electrode plate and the anode electrode plate overlapping with each other.

9. The device according to claim 8 , wherein the first calculation module comprises:
a first calculation unit configured to: when a sensor detects a cut hole of the anode electrode plate, acquire a detection width of a previous anode electrode plate adjacent to the anode electrode plate according to a distance between cut holes of the anode electrode plate and the previous anode electrode plate adjacent to the anode electrode plate, and calculate a width deviation value of the previous anode electrode plate according to the detection width and the calibration width of the anode electrode plate.

10. The device according to claim 9 , wherein the first calculation module further comprises:
a first acquisition unit configured to acquire a calibration position deviation value corresponding to a calibration position of a cut hole photographed by a camera;
a second acquisition unit configured to: when the sensor does not detect the cut hole of the anode electrode plate and the currently detected anode electrode plate meets photographing conditions of the camera, acquire a cut mark image of the currently dete

Assignees

• Contemporary Amperex Technology Hong Kong Ltd
• Contemporary Amperex Tech Co Hong Kong Limited

Inventors

• Chen Canbin
• Hu Jun
• Feng Shiping
• Zheng Qiuhui
• Chang Wen
• Wu Qing
• Lu Haoran

Classifications

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M10/0413

  Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes · CPC title

• H01M10/0404

  Machines for assembling batteries · CPC title

• H01M4/04 Primary

  Processes of manufacture in general · CPC title

• G06T2207/30164

  Workpiece; Machine component · CPC title