Electrode plate slitting method and apparatus, electronic device, and storage medium

Patent metadata

Field	Value
Publication number	US-2025070217-A1
Application number	US-202418942785-A
Country	US
Kind code	A1
Filing date	Nov 11, 2024
Priority date	May 11, 2022
Publication date	Feb 27, 2025
Grant date	—

Abstract

This application provides an electrode plate slitting method and apparatus, an electronic device, and a storage medium. The method includes: obtaining a length of an electrode plate to be cut; and when it is determined that a slitting parameter meeting a preset condition exists based on the length of the electrode plate, cutting the electrode plate to be cut based on the slitting parameter to obtain the electrode plate after cutting. The preset condition includes: the slitting parameter is able to be used for cutting the electrode plate to be cut and a length of each electrode plate roll obtained after cutting is within a preset range. This decreases the probability of obtaining an electrode plate roll with an inappropriate length at the end of the cutting, reducing the waste in the electrode plate.

First claim

What is claimed is:

1 . An electrode plate slitting method, the method comprising:
obtaining a length of an electrode plate to be cut; and when a slitting parameter meets a preset condition, cutting the electrode plate to be cut based on the slitting parameter; wherein the preset condition comprises: the slitting parameter is able to be used for cutting the electrode plate to be cut and a length of each electrode plate roll obtained after cutting is within a preset range.

2 . The method according to claim 1 , wherein a situation that a slitting parameter meeting the preset condition exists comprises:
starting with an initial value of the slitting parameter, determining whether the slitting parameter meets the preset condition; and if not, updating the slitting parameter until the obtained slitting parameter meets the preset condition, and determining that a slitting parameter meeting the preset condition exists.

3 . The method according to claim 1 , wherein a situation that a slitting parameter meeting the preset condition exists comprises:
starting with an initial value of the slitting parameter, determining whether the slitting parameter meets the preset condition; and if not, and a length of an electrode plate after cutting calculated based on the current slitting parameter is greater than a lower limit of the preset range, progressively increasing the slitting parameter until the obtained slitting parameter meets the preset condition, and determining that a slitting parameter meeting the preset condition exists.

4 . The method according to claim 1 , wherein the cutting the electrode plate to be cut based on the slitting parameter comprises:
if a plurality of slitting parameters meeting the preset condition exist, cutting the electrode plate to be cut based on a slitting parameter with a smallest value.

5 . The method according to claim 1 , wherein the cutting the electrode plate to be cut based on the slitting parameter comprises:
if a plurality of slitting parameters meeting the preset condition exist, obtaining the number of cells of the electrode plate after cutting corresponding to each slitting parameter, wherein the number of cells is used for representing the number of cells that are able to be wound by using the electrode plate after cutting; and cutting the electrode plate to be cut based on a slitting parameter corresponding to the number of cells with a smallest decimal part value.

6 . The method according to claim 1 , wherein a difference in lengths of the electrode plate rolls obtained by cutting the electrode plate to be cut based on the slitting parameter is less than a preset threshold.

7 . The method according to claim 1 , wherein the cutting the electrode plate to be cut based on the slitting parameter comprises:
monitoring an actual winding length; correcting the actual winding length by using a compensation parameter to obtain a corrected actual winding length; and if the corrected actual winding length is equal to the length of the electrode plate roll, performing cutting one time.

8 . The method according to claim 7 , wherein the method further comprises:
obtaining a constant plate moving speed and a recorded constant speed winding length during a slitting process; and determining the compensation parameter based on the constant plate moving speed and the constant speed winding length.

9 . The method according to claim 1 , wherein when a slitting parameter meeting the preset condition does not exist, cutting the electrode plate to be cut based on an upper limit of the preset range.

10 . An electrode plate slitting apparatus, characterized by comprising:
an obtaining module, configured to obtain a length of an electrode plate to be cut; and a cutting module, configured to, when a slitting parameter meeting a preset condition exists, cut the electrode plate to be cut based on the slitting parameter; wherein the preset condition comprises: the slitting parameter is able to be used for cutting the electrode plate to be cut and a length of each electrode plate roll obtained after cutting is within a preset range.

11 . The apparatus according to claim 10 , wherein a situation that a slitting parameter meeting the preset condition exists comprises:
starting with an initial value of the slitting parameter, determining whether the slitting parameter meets the preset condition; and if not, updating the slitting parameter until the obtained slitting parameter meets the preset condition, and determining that a slitting parameter meeting the preset condition exists.

12 . The apparatus according to claim 10 , wherein a situation that a slitting parameter meeting the preset condition exists comprises:
starting with an initial value of the slitting parameter, determining whether the slitting parameter meets the preset condition; and if not, and a length of an electrode plate after cutting calculated based on the current slitting parameter is greater than a lower limit of the preset range, progressively increasing the slitting parameter until the obtained slitting parameter meets the preset condition, and determining that a slitting parameter meeting the preset condition exists.

13 . The apparatus according to claim 10 , wherein the cutting module is specifically configured to:
if a plurality of slitting parameters meeting the preset condition exist, cut the electrode plate to be cut based on a slitting parameter with a smallest value.

14 . The apparatus according to claim 10 , wherein the cutting module is specifically configured to:
if a plurality of slitting parameters meeting the preset condition exist, obtain the number of cells of the electrode plate after cutting corresponding to each slitting parameter, wherein the number of cells is used for representing the number of cells that are able to be wound by using the electrode plate after cutting; and cut the electrode plate to be cut based on a slitting parameter corresponding to the number of cells with a smallest decimal part value.

15 . The apparatus according to claim 10 , wherein a difference in lengths of the electrode plate rolls obtained by cutting the electrode plate to be cut based on the slitting parameter is less than a preset threshold.

16 . The apparatus according to claim 10 , wherein the cutting module is specifically configured to:
monitor an actual winding length; correct the actual winding length by using a compensation parameter to obtain a corrected actual winding length; and if the corrected actual winding length is equal to the length of the electrode plate roll, perform cutting one time.

17 . The apparatus according to claim 16 , wherein the apparatus further comprises:
a parameter determining module, configured to obtain a constant plate moving speed and a recorded constant speed winding length during a slitting process; and determine the compensation parameter based on the constant plate moving speed and the constant speed winding length.

18 . The apparatus according to claim 10 , characterized in that the cutting module is further configured to:
if a slitting parameter meeting the preset condition does not exist, cut the electrode plate to be cut based on an upper limit of the preset range.

19 . An electronic device, comprising a processor, a memory, and a bus, wherein
the processor and the memory communicate with each other through the bus; and the memory stores program instructions executable by the processor, and when invoking the program instructions, the pr

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Fan Xiaoyun
• Wang Yuanxin
• Xie Guotao
• Wang Yuan
• Han Wucun
• Lin Deming
• Hu Zhipeng
• Cheng Tao

Classifications

• H01M10/0409

  for cells with wound electrodes · CPC title

• G01B21/06

  specially adapted for measuring length or width of objects while moving · CPC title

• B26D1/14

  with a circular cutting member, e.g. disc cutter · CPC title

• B26D1/143

  rotating about a stationary axis (B26D1/20 - B26D1/24 take precedence) · CPC title

• B26D1/035

  for thin material, e.g. for sheets, strips or the like · CPC title