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Method and device for calculating backflow pressure of extrusion type coating machine, and storage medium

A calculation method and coating device technology, applied in the field of lithium ions, can solve problems such as lack of closed-loop control logic, lack of head weight adjustment, and impact on production efficiency, so as to achieve the effects of improving production efficiency, speed, and consistency

Active Publication Date: 2021-01-05
东莞维科电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is little research on the control and adjustment method of the coating head weight of the pole piece, and the guidance method of the head weight adjustment is lacking in the whole industry. The adjustment of the coating weight often takes a long time, which seriously affects the production Efficiency, adjustment loss is also very large, and the coating process naturally lacks closed-loop control logic

Method used

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  • Method and device for calculating backflow pressure of extrusion type coating machine, and storage medium
  • Method and device for calculating backflow pressure of extrusion type coating machine, and storage medium
  • Method and device for calculating backflow pressure of extrusion type coating machine, and storage medium

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Embodiment 1

[0036] Such as figure 1As shown, the embodiment of the present invention provides a partial structural schematic diagram of an extrusion coating machine, including a slurry delivery pump 110, a return valve 120, a coating device 130, a return pipe 140, a buffer tank 11, a filter 12, a return Regulating valve 13, first hydraulic pressure sensor 15, second hydraulic pressure sensor 16 and third hydraulic pressure sensor 17, buffer tank 11, slurry delivery pump 110, filter 12, return valve 120, coating valve 14 and coating device 130 in sequence One end of the backflow regulating valve 13 is connected with the backflow valve 120 through the backflow pipe 140 through the pipeline, the other end of the backflow regulating valve 13 is connected with the buffer tank 11 through the pipeline, and the coating device 130 is connected with the buffer tank 11 through the pipeline. The first hydraulic sensor 15 is arranged at the pump port of the slurry delivery pump 110 for monitoring the ...

Embodiment 2

[0042] Such as image 3 As shown, the embodiment of the present invention also provides a method for calculating the return pressure of an extrusion coater described in Embodiment 1, including:

[0043] Step 310, obtaining slurry and coating related parameters;

[0044] Extrusion coating machines are widely used in the coating production of lithium-ion batteries, especially for the coating of lithium-ion battery electrodes. According to the needs of actual battery electrodes, the coated slurry has different parameters, for example, for positive and negative electrodes, slurry related parameters such as slurry density, slurry solid content and slurry thixotropy may be different. Similarly, according to the needs of actual battery electrodes, coating related parameters, such as the coating speed of the coating device and the length of the coating gap. The return pressure of the extrusion coater determines the head coating weight of the electrode. The slurry parameters and coat...

Embodiment 3

[0050] The embodiment of the present invention also provides a device for calculating the backflow pressure of an extrusion coater, Figure 4 It is a schematic structural diagram of the extrusion coating machine backflow pressure calculation device provided in the embodiment of the present invention, and the extrusion coating machine backflow pressure calculation device can perform the extrusion coating machine backflow pressure calculation provided in Embodiment 2 of the present invention Method, the extrusion coating machine backflow pressure calculation device comprises:

[0051] Acquisition module 410, for obtaining slurry and coating related parameters:

[0052] The relationship determining module 420 is used for determining the return pressure Py of the return pipe, the determined first feed pressure Px1 of the slurry delivery pump, the determined first feed pressure Px1 of the slurry delivery pump according to the slurry parameters and coating parameters The second fee...

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Abstract

The invention belongs to the technical field of lithium ions, and particularly relates to a method for calculating backflow pressure of an extrusion type coating machine. The extrusion type coating machine comprises a slurry conveying pump, a backflow valve, a coating device and a backflow pipe, wherein the slurry conveying pump communicates with the coating device through the backflow valve, andthe backflow pipe communicates with the backflow valve. The method for calculating the backflow pressure of the extrusion type coating machine comprises the following steps: acquiring slurry and coating related parameters; acquiring a coefficient k value and a coefficient b value in a relational expression Py=k*(Px2-Px1)+b according to determined backflow pressure Py of the backflow pipe, determined first feeding pressure Px1 of the slurry conveying pump and determined second feeding pressure Px2 of the slurry conveying pump under the slurry parameters and the coating parameters; and calculating the backflow pressure of the backflow pipe according to the slurry parameters, the coating parameters, the coefficient k value, the coefficient b value, the first feeding pressure Px1 and the second feeding pressure Px2. With the technical scheme, online closed-loop adjustment of the head weight is realized.

Description

technical field [0001] The invention belongs to the field of lithium ions, and in particular relates to a calculation method, device and storage medium for the backflow pressure of an extrusion coating machine. Background technique [0002] At present, lithium-ion batteries are widely used in various digital products, power vehicles, drones, energy storage and other fields. Electrode coating is a key part of lithium battery production. Due to the high coating accuracy, extrusion coating is widely used in lithium ion battery coating production. In the production process of lithium-ion batteries, the coating weight of pole pieces is a key part of process control. The consistency of coating weight not only affects the capacity distribution, but also has an important impact on battery matching and safety. [0003] Gap coating is a common coating method. In gap coating, the weight control of the coating part (ie head) of the pole piece is often different from that of the middle...

Claims

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Application Information

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IPC IPC(8): B05C11/10B05C5/02
CPCB05C11/1013B05C11/10B05C11/1002B05C5/02
Inventor 刘碧辉楚英李万亮袁成龙王鑫
Owner 东莞维科电池有限公司