Pole piece extension consistency control method and control system

A technology of control system and control method, which is applied in the direction of electrode manufacturing, rolling mill control device, electrode rolling/calendering, etc., can solve the problems of inability to ensure the consistency of pole piece extension and inability to realize online foil extension measurement, so as to ensure the extension Effect

Active Publication Date: 2022-06-03
楚能新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Based on the technical problems existing in the background technology, the present invention proposes a method and control system for the uniformity of pole piece extension to solve the problem that online foil extension measurement cannot be realized , so that it is impossible to ensure the consistency of the extension of the pole piece

Method used

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  • Pole piece extension consistency control method and control system
  • Pole piece extension consistency control method and control system
  • Pole piece extension consistency control method and control system

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment is a pole piece extension consistency control system for realizing one-level closed-loop control of online extension. like figure 1 and figure 2As shown, PLC12 controls inkjet 1 to spray code to pole piece 2, denoted as inkjet 1, and uses the method of ink spraying as the sampling reference, while PLC12 controls the encoder to record the length of the pole piece 2 to travel, until the encoder records When the length of the running tape reaches the preset value L, a feedback signal is sent to the PLC12. At this time, the PLC12 controls the inkjet 1 to spray code to the pole piece 2, which is recorded as inkjet 2. The image information collected by the first camera 4, the second camera 6, and the third camera 10 respectively identifies the distance between the inkjet 1 and the inkjet 2 on the upper surface of the pole piece 2 to judge the extension state of the pole piece in real time, and the online measurement data is fed back to the PLC12, The on-lin...

Embodiment 2

[0044] The present embodiment is a pole piece extension consistency control method for realizing one-level closed-loop control of online extension, including the following steps:

[0045] S1 controls the ink jet 1 to print the ink on the upper surface of the pole piece 2, the pole piece 2 produces the ink jet 1, the pole piece 2 runs in the direction of the roller 3, and the encoder of the pole piece roll tension control system records the pole piece Chip coding position;

[0046] S2 When the distance between the travel distance of the pole piece and the coding position of the pole piece reaches the preset value L, the ink jet 1 is controlled to print the code on the upper surface of the pole piece 2 again, and the ink jet code is generated on the pole piece 2 2;

[0047] S3 The first camera 4 collects the image signal of the pole piece 2 passing between the front pass roller 3 and the front tension roller 5, and identifies the position information of the inkjet 1 and the ink...

Embodiment 3

[0073] This embodiment is a pole piece extension consistency control system that realizes two-level closed-loop control of online extension. Compared with Embodiment 1, the linear motors provided in this embodiment include left linear motors respectively arranged on the left and right sides of the front tension roller 5 . 13. The right linear motor 14, the left linear motor 13 and the right linear motor 14 are respectively arranged on the left and right sides of the rear tension roller 9, such as Figure 4 As shown, the left linear motor 13 and the right linear motor 14 are respectively used to control the left and right tension of the tension roller, so as to adjust the elongation ratios of the left and right sides of the pole piece 2 respectively. The PLC12 compares the extension difference between the left and right sides of the foil, and feeds the signal to the linear motor through the control logic, adjusts the tension roller gap through the linear motor, changes the tensi...

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Abstract

The invention discloses a pole piece extension consistency control method and a control system, the system comprises a code sprayer, a first camera, a second camera, a third camera and a PLC which are sequentially arranged along a pole piece belt conveying direction, a code spraying port of the code sprayer is vertically downward and is opposite to the upper surface of a pole piece which is ready to enter a front passing roller, lenses of the first camera, the second camera and the third camera are vertically arranged downwards and are sequentially positioned between the front passing roller and the front tension roller, between the front tension roller and the upper and lower rollers and between the rear tension roller and the rear passing roller; the PLC receives the image information collected by the first camera, the second camera and the third camera, identifies the code spraying position on the upper surface of the pole piece, judges the extension state of the pole piece in real time, and sends a control instruction; and the pole piece rolling tension control system adjusts the stretching tension according to the control instruction to keep the extension consistency state of the pole piece. According to the invention, sufficient extension of the tab region can be ensured, and the problem of snake-shaped bending of the pole piece caused by insufficient extension of the tab region or wrinkling of the foil region caused by over-stretching of the tab can be avoided.

Description

technical field [0001] The invention relates to the technical field of lithium battery pole piece rolling, in particular to a method and a control system for controlling the extension consistency of a pole piece in a rolling process. Background technique [0002] In the lithium battery production process, after the pole piece is coated, the main material particles are in a free stacking state. At this time, the pole piece energy density is very small and does not meet the industrial needs. It is necessary to increase the pole piece compaction density by means of roller pressure. Due to the thickness difference between the coating area and the foil area during the rolling process, there will be a problem of inconsistency in the extension after rolling. The thicker coating area can be fully extended. Insufficient extension of the foil area causes the pole pieces to wrinkle or break. [0003] At present, employees in the industry use a steel ruler to measure the offline extens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/48B21B37/00H01M4/04H01M4/08H01M4/139
CPCB21B37/48B21B37/00H01M4/0435H01M4/139H01M4/08Y02E60/10
Inventor 代德明付强矫贺东胡奇智钟祥龙张恒徐强
Owner 楚能新能源股份有限公司
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