CN117369547B

CN117369547B - Speed control system, method and pole piece production equipment integrated device

Info

Publication number: CN117369547B
Application number: CN202311640077.0A
Authority: CN
Inventors: 吴其明; 袁浩森; 彭建林
Original assignee: Shenzhen Manst Technology Co Ltd
Current assignee: Shenzhen Manst Technology Co Ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-03-29
Anticipated expiration: 2043-12-04
Also published as: CN117369547A

Abstract

The invention provides a speed control system, a speed control method and a pole piece production equipment integrated device, which are applied to the pole piece production equipment integrated device, wherein the pole piece production equipment integrated device comprises a plurality of single-machine equipment, and every two single-machine equipment are connected through a buffer device; the system comprises: the system comprises a first-stage control module, a second-stage control module and a third-stage control module which are in communication connection. In the mode, the third-stage control module is used for controlling and acquiring the adjusting position of the buffer device, and when the adjusting position reaches the preset adjusting position, the second-stage control module is used for adjusting the shaft speed of the single-machine device, so that the speeds of the single-machine devices in the production process of the battery pole piece are matched, the tension of the pole piece is kept within the preset tension range, and the normal production of the pole piece is ensured.

Description

Speed control system, method and pole piece production equipment integrated device

Technical Field

The invention relates to the technical field of lithium battery production, in particular to a speed control system and method and pole piece production equipment integrated device.

Background

In the new energy lithium battery industry, the production of lithium ion batteries is a complex system, and the lithium battery manufacturing process can be divided into a front-stage process (pole piece manufacturing), a middle-stage process (battery cell synthesis) and a back-stage process (formation packaging) as a whole. The main process flow of the front-stage procedure is as follows: stirring, coating, rolling, slitting, tabletting and die cutting, wherein the related equipment mainly comprises: a stirrer, a coating machine, a roller press, a slitting machine, a pelleter, a die cutting machine and the like.

At present, a coating machine, a roller press, a die cutting machine and a winding machine are independent single-machine equipment, and a pole piece needs to be wound, stored, carried and unreeled for multiple times, so that a large amount of production space is occupied, and the quality control difficulty of the pole piece is increased. If all the single-machine devices are directly connected, tension fluctuation of the pole piece can be caused due to speed mismatch among the single-machine devices in the process of winding from a coating die to a battery cell in a large span, and when the fluctuation of the pole piece exceeds a preset fluctuation range, a phenomenon of pole segment bands can be generated.

Disclosure of Invention

Therefore, the invention aims to provide a speed control system, a speed control method and an integrated device of pole piece production equipment, so that the speeds of all single-machine equipment in the production process of the battery pole piece are matched, the tension of the pole piece is kept within a preset tension range, and the normal production of the pole piece is further ensured.

In a first aspect, an embodiment of the present invention provides a speed control system, which is applied to an integrated device of a pole piece production device, where the integrated device of the pole piece production device includes a plurality of single-machine devices, and each two single-machine devices are connected through a buffer device; the system comprises: the first-stage control module, the second-stage control module and the third-stage control module are in communication connection; the third-level control module is used for acquiring the adjustment position of each buffer device in real time after the pole piece production device integrated device starts to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjusting position is reached, generating a first feedback speed according to the adjusting position and the first preset adjusting position, and sending the first feedback speed to a corresponding second-stage control module so that the second-stage control module generates the current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to the first-stage control module; the adjusting position is a position of the buffer equipment according to tension adjustment of the pole piece; the first-stage control module is used for adjusting the initial speed according to the second feedback speed and sending the adjusted initial speed to the corresponding second-stage control module so that the second-stage control module generates the corresponding current single machine equipment shaft speed according to the adjusted initial speed; and the second-stage control module is used for controlling the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range.

Further, the first-stage control module comprises a speed setting module and a speed distribution module which are in communication connection; the second-stage control module comprises a plurality of second-stage sub-control modules; each secondary sub-control module comprises a speed acquisition module and a speed control module which are in communication connection; the speed distribution module is in communication connection with the speed acquisition module; the speed setting module is in communication connection with the upper computer; the speed control module is in communication connection with corresponding single-machine equipment; the speed setting module is used for acquiring the set speed sent by the upper computer and sending the set speed to the speed distribution module; the speed distribution module is used for generating an initial speed according to the set speed and sending the initial speed to each secondary sub-control module; the speed acquisition module is used for transmitting the acquired initial speed to the speed control module; and the speed control module is used for generating the initial single machine equipment shaft speed corresponding to the current secondary sub-control module according to the initial speed and the preset linear speed-shaft speed corresponding relation, and sending all the initial single machine equipment shaft speeds to the corresponding single machine equipment so that the single machine equipment operates according to the initial single machine equipment shaft speed.

Further, the secondary sub-control module also comprises a tension control module and a shaft speed detection module, and the tension control module and the shaft speed detection module are respectively connected with the single machine equipment; the shaft speed detection module is used for acquiring the shaft speed of the main shaft and the shaft speed of the single machine equipment; the tension control module is used for acquiring the pole piece tension of the pole piece passing through the single machine equipment, and adjusting the shaft speed of the single machine equipment until the pole piece tension is in a preset tension range when the pole piece tension is not in the preset tension range and the adjusting position of the buffer equipment adjacent to the single machine equipment is not in a first preset adjusting position.

Further, the third level control module comprises a plurality of third level sub-control modules; the three-level sub-control module is in communication connection with the corresponding cache equipment; the three-level sub-control module comprises a shaft speed acquisition module and a tension feedback module; each three-level sub-control module is in communication connection with a two-level sub-control module corresponding to single-machine equipment, and buffer equipment corresponding to the three-level sub-control modules is connected with the single-machine equipment; the shaft speed acquisition module is used for acquiring the shaft speed of the main shaft and the shaft speed of the slave shaft sent by the adjacent two-stage sub-control module in real time;

and the tension feedback module is used for acquiring the adjustment position of the buffer equipment in real time.

Further, the first preset adjustment bit comprises a tape elimination safety bit and a tape storage safety bit; the secondary sub-control module further comprises a secondary speed feedback module and a secondary speed adjusting module which are in communication connection, and the tertiary sub-control module further comprises a tertiary speed and position feedback module; the three-stage speed and position feedback module is used for calculating the position difference between the adjusting position of the cache device and a preset middle position; when the adjustment position reaches the elimination safety position, determining a first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second-level speed feedback module corresponding to the first-level sub-control module; when the adjustment position reaches the storage safety position, determining a first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second-stage speed feedback module corresponding to a second-stage sub-control module; the single machine equipment for transmitting the pole piece to the cache equipment is first single machine equipment, and the first secondary sub-control module is in communication connection with the first single machine equipment; the single machine equipment for receiving the pole piece transmitted by the buffer equipment is second single machine equipment, and the second level sub-control module is in communication connection with the second single machine equipment; the second speed adjusting module is used for acquiring the first feedback speed sent by the second speed feedback module and generating the current single machine equipment shaft speed according to a preset conversion method, the first feedback speed and the main shaft speed.

Further, the second preset adjustment bit comprises a tape elimination fault bit and a tape storage fault bit; the first-stage control module comprises a first-stage speed feedback module; the primary speed feedback module is respectively in communication connection with each secondary speed feedback module and each tertiary speed and position feedback module; the three-stage speed and position feedback module is used for determining the real-time spindle shaft speed corresponding to the first secondary sub-control module as a second feedback speed when the adjustment position reaches the elimination fault position, and sending the second feedback speed to the first-stage speed feedback module; when the adjustment position reaches the storage fault position, determining the real-time spindle shaft speed corresponding to the second-stage sub-control module as a second feedback speed, and sending the second feedback speed to the first-stage speed feedback module; the first-stage speed feedback module is used for adjusting the initial speed according to the second feedback speed; when the adjusting position is the elimination fault position, the adjusted initial speed is sent to a second-stage speed feedback module corresponding to the first single machine equipment to be adjusted; when the adjusting position is the fault position of the storage belt, the adjusted initial speed is sent to a second-stage speed feedback module corresponding to the second single machine equipment to be adjusted; in the pole piece production equipment integrated device, each single machine equipment in front of the buffer equipment is first single machine equipment to be adjusted along the running direction of the pole piece; in the pole piece production equipment integrated device, each single machine equipment behind the buffer equipment is second single machine equipment to be adjusted along the running direction of the pole piece; the secondary speed adjusting module is used for acquiring the adjusted initial speed sent by the secondary speed feedback module and generating the current single machine equipment shaft speed according to a preset conversion method, the adjusted initial speed and the main shaft speed.

Further, the second-stage control module also comprises a shaft speed buffer module; and the shaft speed buffer module is used for storing the shaft speed of the main shaft of the single machine equipment.

In a second aspect, an embodiment of the present invention provides a speed control method applied to the speed control system of any one of the above-mentioned aspects; the method comprises the following steps: the third-level control module acquires the adjustment positions of all the cache devices in real time after the pole piece production device integrated device starts to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjusting position is reached, generating a first feedback speed according to the adjusting position and the first preset adjusting position, and sending the first feedback speed to a corresponding second-stage control module so that the second-stage control module generates the current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to the first-stage control module; the adjusting position is a position automatically adjusted by the buffer equipment according to the tension of the pole piece; the first-stage control module adjusts the initial speed according to the second feedback speed, and sends the adjusted initial speed to a corresponding second-stage control module, so that the second-stage control module generates a corresponding current single machine equipment shaft speed according to the adjusted initial speed; and the second-stage control module controls the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range.

In a third aspect, an embodiment of the present invention provides an integrated apparatus for pole piece production equipment, including a plurality of stand-alone devices, a cache device, and a speed control system of any one of the above devices; the speed control system is in communication connection with the single machine equipment; every two single devices are connected through a buffer device.

Further, the buffer device is a floating roller assembly.

The embodiment of the invention provides a speed control system, a speed control method and a pole piece production equipment integrated device, wherein the pole piece production equipment integrated device comprises a plurality of single-machine equipment, and every two single-machine equipment are connected through a buffer device; the system comprises: the first-stage control module, the second-stage control module and the third-stage control module are in communication connection; the third-level control module is used for acquiring the adjustment position of each buffer device in real time after the pole piece production device integrated device starts to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjusting position is reached, generating a first feedback speed according to the adjusting position and the first preset adjusting position, and sending the first feedback speed to a corresponding second-stage control module so that the second-stage control module generates the current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to the first-stage control module; the adjusting position is a position of the buffer equipment according to tension adjustment of the pole piece; the first-stage control module is used for adjusting the initial speed according to the second feedback speed and sending the adjusted initial speed to the corresponding second-stage control module so that the second-stage control module generates the corresponding current single machine equipment shaft speed according to the adjusted initial speed; and the second-stage control module is used for controlling the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range. In the mode, the third-stage control module is used for controlling and acquiring the adjusting position of the buffer device, and when the adjusting position reaches the preset adjusting position, the second-stage control module is used for adjusting the shaft speed of the single-machine device, so that the speeds of the single-machine devices in the production process of the battery pole piece are matched, the tension of the pole piece is kept within the preset tension range, and the normal production of the pole piece is ensured.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a speed control system according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of a first stage control module according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a second stage control module according to a first embodiment of the present invention;

FIG. 4 is a schematic diagram of a third stage control module according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a connection relationship of a speed control system according to a first embodiment of the present invention;

FIG. 6 is a flow chart of a speed control method according to a second embodiment of the present invention;

fig. 7 is a schematic diagram of an integrated device of a pole piece production apparatus according to a third embodiment of the present invention;

fig. 8 is a schematic diagram of an integrated entity device of a pole piece production apparatus according to a third embodiment of the present invention.

Icon: 1-a first stage control module; 11-a speed setting module; 12-a speed distribution module; 13-a primary speed feedback module; 2-a second stage control module; a 21-two-stage sub-control module; 22-a speed acquisition module; 23-a speed control module; 24-a tension control module; 25-a shaft speed detection module; a 26-second stage speed feedback module; a 27-axis speed cache module; 28-a secondary speed adjustment module; 3-a third stage control module; 31-three-level sub-control modules; a 32-axis speed acquisition module; 33-a tension feedback module; 34-three stage speed and position feedback module; 4-stand-alone equipment; 5-caching the device; 6-speed control system.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The new energy lithium battery industry, the anterior segment process of lithium battery production is used for the pole piece to make, and the equipment that relates to mainly includes: coating machine, roller press, die cutting machine and winding machine. Each single machine device works independently, so that the pole piece production process is low in efficiency, the pole piece needs to be wound, stored, carried and unreeled for multiple times, a large amount of production space is occupied, the quality control difficulty of the pole piece is increased, and the production beat can not be improved. In the process from coating of the coating machine to battery winding of the winding machine, the span of the pole piece is too large, and if the speeds of the single machine equipment are not matched, tension fluctuation of the pole piece can be caused, so that frequent pole piece breakage can be caused.

Based on the above, the application provides a speed control system, a speed control method and a pole piece production equipment integrated device, which are applied to the pole piece production equipment integrated device. Therefore, the speeds of the single-machine devices in the production process of the battery pole piece are matched, the tension of the pole piece is kept within a preset tension range, and the normal production of the pole piece is further ensured.

In order to facilitate understanding of the present embodiment, the following describes embodiments of the present invention in detail.

Embodiment one:

fig. 1 is a schematic structural diagram of a speed control system according to an embodiment of the present invention.

The speed control system is applied to an integrated device of the pole piece production equipment, and the integrated device of the pole piece production equipment comprises a plurality of single-machine equipment, and every two single-machine equipment are connected through a buffer device. The stand-alone device comprises a main shaft and a slave shaft, wherein the slave shaft comprises a winding shaft and a unwinding shaft. The buffer device comprises a winding shaft and a unwinding shaft. When the pole piece production device is integrated into a whole device for pole piece production, the pole piece is input into the winding shaft of the buffer device after being output from the unwinding shaft of the single machine device, and is input into the winding shaft of the next single machine device after being output from the unwinding shaft of the buffer device.

According to the running direction of the pole piece, the shaft speed of the winding shaft of the buffer device is equal to that of the unwinding shaft of the former single machine device, and the shaft speed of the unwinding shaft of the buffer device is equal to that of the winding shaft of the latter single machine device.

Referring to fig. 1, the system includes: the system comprises a first-stage control module 1, a second-stage control module 2 and a third-stage control module 3 which are in communication connection.

Here, the second-stage control module 2 is in communication connection with all the stand-alone devices; the third-level control module is in communication connection with all the cache devices.

In one embodiment, referring to fig. 2, the first-stage control module 1 includes a speed setting module 11 and a speed distribution module 12 that are communicatively connected; the second-stage control module 2 includes a plurality of second-stage sub-control modules 21; each secondary sub-control module 21 comprises a speed acquisition module 22 and a speed control module 23 which are in communication connection; the speed distribution module 12 is in communication with the speed acquisition module 22; the speed setting module 11 is in communication connection with the upper computer; the speed control module 23 is communicatively connected to a corresponding stand-alone device.

Speed of speedA setting module 11 for obtaining a set speed sent by the upper computerAnd will set the speed +.>To the speed distribution module 12.

Here, the set speed is preset by the user through the upper computer. The set speed is a linear speed.

The speed distribution module 12 is configured to generate an initial speed according to the set speed, and send the initial speed to each secondary sub-control module 21.

Here, the initial speed is equal to the set speed when starting the operation. The initial speed of each secondary sub-control module 21 is the same.

The speed acquisition module 22 is configured to send the acquired initial speed to the speed control module 23.

The speed control module 23 is configured to generate an initial single machine shaft speed corresponding to the current secondary sub-control module 21 according to the initial speed and the preset linear speed-shaft speed correspondence, and send all the initial single machine shaft speeds to the corresponding single machine so that the single machine operates according to the initial single machine shaft speed.

Here, the preset linear velocity-axis velocity correspondence is set according to the tension condition of the actual single machine equipment, so as to ensure that the pole piece arrangement when the pole piece passes through all the single machine equipment is kept within the preset tension range.

The preset corresponding relation between the linear speed and the shaft speed is thatWherein->For the initial stand-alone device shaft speed, < >>Numbering for stand-alone devices>Is a reduction ratio->Is the radius of the main shaft. Each secondary sub-control module 21 calculates the corresponding initial single machine equipment shaft speed, and converts the linear speed of pole piece tape to the rotating speed of each shaft, so that the synchronous command speed can be realized.

Specifically, the pole piece production equipment integrated device comprises a coating machine, a roller press, a die cutting machine and a winding machine which are sequentially connected through a buffer equipment. Assume that the set speed set by the user on the human-computer interface is60m/min.

The first-stage control module 1 sets the speedConversion to initial speed +.>60m/min, and sent to the speed control module 23 of the corresponding secondary sub-control module 21 of each stand-alone device. The first stage system distributes the 60m/min speed to the second stage sub-control module 21. For example: in the coating machine numbering, a coating traction shaft is a main shaft, and the reduction ratio k is 5:1, the traction axis radius R is 50mm. The speed control module 23 calculates the spindle speed V of the coater ₁ Is->. The roll-in axle of roll squeezer is the main shaft, and gear reduction ratio k is 20:1, the rolling radius is 1000mm. The speed control module 23 calculates the spindle shaft speed V of the roll squeezer ₂ Is->。

When the device starts to work, the spindle shaft speed, the unreeling shaft speed and the reeling shaft speed in each single machine device are equal.

The third-stage control module 3 is used for acquiring the adjustment position of each buffer device in real time after the pole piece production device integrated device begins to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjustment position is reached, generating a first feedback speed according to the adjustment position and the first preset adjustment position, and sending the first feedback speed to a corresponding second-stage control module 2, so that the second-stage control module 2 generates the current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to the first-stage control module 1; the adjusting position is a position of the buffer device according to tension adjustment of the pole piece.

Here, the buffer device is a take-up shaft, a dancer roller assembly, and a pay-off shaft connected in order. The floating roller assembly consists of a fixed roller and a floating roller, the floating roller is arranged in the tracks on two sides, the shaft ends on two sides of the floating roller are connected with sliding blocks, and the self position of the floating roller assembly is regulated through the balance of tension and self gravity of the roller during working.

In the pole piece production equipment integrated device, along the running direction of the pole piece, single-machine equipment in front of the buffer equipment is front single-machine equipment, and single-machine equipment behind the buffer equipment is rear single-machine equipment. The speed of the winding shaft of the buffer device is equal to that of the unwinding shaft of the front single machine device, and the speed of the unwinding shaft of the buffer device is equal to that of the winding shaft of the rear single machine device. When a speed difference exists between the speed of the unwinding shaft of the front single machine and the speed of the winding shaft of the rear single machine, the tension of the pole piece can be changed, and the floating roller assembly can adjust the position according to the tension and self gravity balance to keep the tension of the pole piece within a preset tension range when the tension is not within the preset tension range, wherein the adjusted position is an adjusting position.

The cache device comprises a preset middle position, a first preset adjusting position and a second preset adjusting position which are preset according to actual conditions. The preset middle bit is in the middle of the cache device. When the buffer storage equipment is between the preset middle position and the first preset adjusting position, the pole piece production equipment integrated device normally operates. And when the cache equipment is between the first preset adjusting position and the second preset adjusting position, adjusting the running speeds of two single-machine equipment connected with the cache equipment front and back. When the buffer memory device reaches a second preset adjustment position, the initial speed is adjusted.

The first feedback speed is the difference between the adjustment position and the preset middle position, and the second feedback speed is the current spindle shaft speed of the single-machine equipment with low speed.

Specifically, assume that the preset middle position of the buffer device between the coater and the roller press isThe adjustment position is +.>Position adjustment +.>And preset intermediate bit->Difference between->The unwinding shaft speed of the coater>And the speed of the reel shaft of the roller press>There is a speed difference->. When adjusting position +>In the preset middle bit->And a first preset adjustment position, and +.>The dancer roll assembly in the buffering device between the coater and the roll squeezer is directed in the direction of web removal (bufferingAbove the storage device); when adjusting position +>In the preset middle bit->And a first preset adjustment position, and +.>The dancer assembly between the coater and the calender moves in the tape storage direction (below the buffer). At this time, the buffer device moves to automatically balance tension fluctuation through physical adjustment so as to keep the tension within a preset tension range.

The first-stage control module 1 is configured to adjust an initial speed according to the second feedback speed, and send the adjusted initial speed to the corresponding second-stage control module 2, so that the second-stage control module 2 generates a corresponding current stand-alone equipment shaft speed according to the adjusted initial speed.

Specifically, when the buffer device reaches the second preset adjustment position, the third-stage control module sends the current spindle speed of the single-machine device with low speed to the first-stage control module 1, so that the first-stage control module 1 adjusts the initial speed according to the current spindle speed of the single-machine device with low speed, and the adjusted initial speedTo the second-stage control module 2.

And the second-stage control module 2 is used for controlling the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range.

Here, the preset tension range is set according to the actual situation, and the preset tension range is a tension range value for ensuring that the pole piece is continuously kept. When the tension of the pole piece is in the preset tension range, the adjusting position of the buffer storage device is between the preset middle position and the first preset adjusting position.

When the second-stage control module 2 adjusts the initial speedAfter the corresponding single machine equipment is controlled to run and the adjusting position of the buffer equipment is separated from the second preset adjusting position, the second-stage control module 2 sends feedback information to the first-stage adjusting module, and the first-stage adjusting module is used for adjusting the initial speed +.>Restoring to the original speed +. >。

In an embodiment, referring to fig. 3, the secondary sub-control module 21 further includes a tension control module 24 and a shaft speed detection module 25, where the tension control module 24 and the shaft speed detection module 25 are respectively connected to a stand-alone device.

The spindle speed detection module 25 is used for acquiring the spindle speed and the spindle speed of the stand-alone equipment.

Here, the spindle shaft speed and the spindle shaft speed are obtained by reading an encoder in a stand-alone device. The spool shaft speed includes a take-up spool shaft speed and a pay-off spool shaft speed.

And the tension control module 24 is used for acquiring the pole piece tension of the pole piece passing through the single machine equipment, and adjusting the shaft speed of the single machine equipment until the pole piece tension is in a preset tension range when the pole piece tension is not in a preset tension range and the adjusting position of the buffer equipment adjacent to the single machine equipment is not in a first preset adjusting position.

Here, when the change of the pole piece tension of the pole piece passing through the single machine device is not within the preset tension range, but the current tension change does not cause the adjusting position of the adjacent buffer device to reach the first preset adjusting position, the single machine device internally adjusts the speed of the shaft so as to restore the pole piece tension to be within the preset tension range.

Specifically, if the tension of the pole piece passing through the coater becomes large, but the adjusting position of the buffer equipment connected with the tension does not reach the first preset adjusting position, the speed of the unwinding shaft of the coater is increased by a controller in the coater until the tension of the pole piece is restored to be within the preset tension range.

If the tension of the pole piece passing through the roller press is increased, but the adjusting positions of the two buffer devices connected with the roller press do not reach the first preset adjusting position, the speed of the unwinding shaft of the roller press is increased or the speed of the winding shaft of the roller press is reduced by a controller in the roller press until the tension of the pole piece is recovered to be within a preset tension range. And the adjusting position of the buffer equipment between the coating machine and the roller press and the adjusting position of the buffer equipment between the roller press and the die cutting machine are obtained, and a first distance difference between the adjusting position of the buffer equipment between the coating machine and the roller press and a first preset adjusting position and a second distance difference between the adjusting position of the buffer equipment between the roller press and the die cutting machine and the first preset adjusting position are calculated respectively. If the first distance difference is greater than the second distance difference, slowing down the speed of the rolling shaft of the roller press by a controller in the roller press until the tension of the pole piece is restored to be within a preset tension range. If the second distance difference is larger than the first distance difference, the speed of the unreeling shaft of the roller press is increased through a controller in the roller press until the tension of the pole piece is restored to be within a preset tension range.

In one embodiment, referring to FIG. 4, the third level control module 3 includes a plurality of third level sub-control modules 31; the three-level sub-control module 31 is in communication connection with the corresponding cache device; the three-stage sub-control module 31 includes a shaft speed acquisition module 32 and a tension feedback module 33.

Each tertiary sub-control module 31 is in communication connection with the secondary sub-control module 21 corresponding to the single-machine device, and the buffer device corresponding to the tertiary sub-control module 31 is connected with the single-machine device.

Here, each of the three-stage sub-control modules 31 is communicatively connected to two of the two-stage sub-control modules 21, respectively.

And the shaft speed acquisition module 32 is used for acquiring the shaft speed of the main shaft and the shaft speed of the main shaft sent by the adjacent secondary sub-control modules in real time.

Here, the unreeling shaft speed sent by the previous two-stage sub-control module is determined as the reeling shaft speed of the cache device. And determining the speed of the winding shaft sent by the secondary sub-control module as the speed of the unwinding shaft of the caching device. The speed of the winding shaft and the speed of the unwinding shaft of the buffer equipment are automatically changed according to the speed of the unwinding shaft sent by the two secondary sub-control modules.

And the tension feedback module 33 is used for acquiring the adjustment position of the buffer equipment in real time.

Here, when there is a speed difference between the unwinding shaft speed sent by the front secondary sub-control module and the winding shaft speed sent by the rear secondary sub-control module (i.e., there is a speed difference between the winding shaft speed and the unwinding shaft speed of the buffer device), the pole piece tension of the pole piece passing through the buffer device is within a preset tension range by moving up and down the dancer roller assembly. And determining the adjusting position of the buffer device by determining the position of the floating roller assembly.

In one embodiment, the first preset adjustment bits include a nullband security bit and a memory band security bit. The second preset adjustment bits include a tape elimination fault bit and a tape storage fault bit.

Here, the line between the extinction and storage safety bits is the y-axis with the preset middle bit of the cache device as the origin. The tape elimination safety bit and the tape elimination fault bit are positioned above the preset intermediate bit, and the tape storage safety bit and the tape storage fault bit are positioned below the preset intermediate bit. The buffer device moves along the y-axis direction of the tape elimination fault bit to eliminate tape, and the buffer device moves along the y-axis direction of the tape storage fault bit to store tape.

Referring to FIG. 5, the secondary sub-control module 21 further includes a communicatively coupled secondary speed feedback module 26 and secondary speed adjustment module 28, and the tertiary sub-control module 31 further includes a tertiary speed and position feedback module 34.

A three-stage speed and position feedback module 34 for calculating a position difference between the adjusted position and the intermediate position of the caching device; when the adjustment position reaches the elimination safety position, determining a first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second-level speed feedback module 26 corresponding to the first-level sub-control module; when the adjustment position reaches the storage safety position, determining a first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second-stage speed feedback module 26 corresponding to the second-stage sub-control module; the single machine equipment for transmitting the pole piece to the cache equipment is first single machine equipment, and the first secondary sub-control module is in communication connection with the first single machine equipment; the single machine equipment for receiving the pole piece transmitted by the buffer equipment is second single machine equipment, and the second level sub-control module is in communication connection with the second single machine equipment.

The preset feedback speed determining method is preset according to actual conditions, and the first feedback speed is obtained through calculation of the preset feedback speed determining method and the position difference value.

The secondary speed adjustment module 28 is configured to obtain the first feedback speed sent by the secondary speed feedback module 26, and generate the current stand-alone device spindle speed according to the preset conversion method, the first feedback speed and the spindle speed.

Here, the secondary speed feedback module 26 sends the acquired first feedback speed to the secondary speed adjustment module 28.

The preset conversion method is preset according to actual conditions. And converting the first feedback speed into the additional speed of the main shaft through a preset conversion method. And acquiring the real-time spindle shaft speed of the single machine equipment, wherein the current spindle shaft speed of the single machine equipment is the sum of the real-time spindle shaft speed and the additional spindle speed. When the additional speed of the main shaft is calculated, the first feedback speed takes an absolute value, and the additional speed of the main shaft is always positive. The real-time spindle speed is equal to the real-time spindle speed.

Specifically, the coater is assumed to be a first stand-alone device, the roll squeezer is assumed to be a second stand-alone device, and the buffer storage device is assumed to be a buffer storage device between the coater and the roll squeezer. Unwinding shaft speed of coater And the speed of the reel shaft of the roller press>There is a speed difference->. When->When the adjusting position of the buffer device is between the extinction safety position and the extinction fault position, the buffer device performs extinction operation, and the speed difference is adopted>And calculating a first feedback speed by a preset feedback speed determining method>First feedback speed +.>To the secondary speed feedback module 26, the secondary speed adjustment module 28 adjusts the first feedback speed according to a preset transition method>And converting the speed into the spindle additional speed, acquiring the real-time spindle shaft speed of the coating machine, wherein the current single machine equipment shaft speed of the coating machine is the sum of the real-time spindle shaft speed and the spindle additional speed, and accelerating the coating machine.

When (when)When the adjusting position of the buffer memory device is between the memory safety bit and the memory fault bit, the memory band of the buffer memory device runs, and the speed difference is adopted>And calculating a first feedback speed by a preset feedback speed determining method>First feedback speed +.>To the secondary speed feedback module 26, the secondary speed adjustment module 28 adjusts the first feedback speed according to a preset transition method>Converting into additional speed of main shaft, obtaining real-time main shaft speed of roller press, and obtaining the real-time main shaft speed of roller pressThe current shaft speed of the single machine equipment is the sum of the real-time shaft speed of the main shaft and the additional speed of the main shaft, and the roller press is accelerated.

In one embodiment, referring to fig. 5, the first stage control module 1 includes a first stage speed feedback module 13; the primary speed feedback module 13 is communicatively coupled to each of the secondary speed feedback modules 26 and each of the tertiary speed and position feedback modules 34, respectively.

Here, when the adjustment position reaches the second preset adjustment position, the primary speed feedback module 13 issues a deceleration warning alert.

The third-stage speed and position feedback module 34 is configured to determine, when the adjustment position reaches the elimination fault position, the real-time spindle speed corresponding to the first secondary sub-control module 21 as a second feedback speed, and send the second feedback speed to the first-stage speed feedback module 13; when the adjustment position reaches the tape fault position, the real-time spindle shaft speed corresponding to the second-stage sub-control module 21 is determined to be a second feedback speed, and the second feedback speed is sent to the first-stage speed feedback module 13.

A first-stage speed feedback module 13, configured to adjust an initial speed according to the second feedback speed; when the adjustment position is the elimination fault position, the adjusted initial speed is sent to a second-stage speed feedback module 26 corresponding to the first single-machine equipment to be adjusted; when the adjustment position is the fault position of the storage belt, the adjusted initial speed is sent to a second-stage speed feedback module 26 corresponding to the second single machine equipment to be adjusted; in the pole piece production equipment integrated device, each single machine equipment in front of the buffer equipment is first single machine equipment to be adjusted along the running direction of the pole piece; in the pole piece production equipment integrated device, along the running direction of the pole piece, each single machine equipment behind the buffer equipment is second single machine equipment to be adjusted.

Here, the adjusted initial speed is a difference between the initial speed and the second feedback speed.

The secondary speed adjusting module 28 is configured to obtain the adjusted initial speed sent by the secondary speed feedback module 26, and generate the current stand-alone device shaft speed according to the preset conversion method, the adjusted initial speed, and the spindle shaft speed.

Here, the current stand-alone equipment shaft speed is the sum of the spindle shaft speed and the adjusted initial speed.

Specifically, the coater is assumed to be a first stand-alone device, the roll squeezer is assumed to be a second stand-alone device, and the buffer storage device is assumed to be a buffer storage device between the coater and the roll squeezer. Unwinding shaft speed of coaterAnd the speed of the reel shaft of the roller press>There is a speed difference->. When->When the adjusting position of the buffer device reaches the eliminating fault position, the buffer device is in eliminating operation, and the three-stage speed and position feedback module 34 determines the main shaft speed of the coating machine>For the second feedback speed->Second feedback speed +.>To the primary speed feedback module 13. The primary speed feedback module 13 is based on the second feedback speedCalculating to obtain the adjusted initial speed +.>Is->. The first single machine to be adjusted is determined to be a coating device, and the secondary speed feedback module 26 acquires the spindle shaft speed of the coating machine in real time >According to the preset switching method, the adjusted initial speed and the spindle shaft speed +.>Current stand-alone equipment shaft speed of the production coater>Is->. And simultaneously, the current main shaft speed value and the current shaft speed adjustment value are converted into the current stand-alone equipment shaft speed value.

When (when)When the adjusting position of the buffer device has a tape fault position, the buffer device is in tape operation, and the three-stage speed and position feedback module 34 determines the main shaft speed of the roller press>For the second feedback speed->Second feedback speed +.>To the primary speed feedback module 13. The primary speed feedback module 13 is based on the second feedback speed +.>Calculating to obtain the adjusted initial speed +.>Is->. The first single machine to be adjusted is determined to be a roller press, a die cutting machine and a winding machine, and the secondary speed feedback module 26 acquires the main shaft speed of the roller press and the main shaft of the die cutting machine in real timeAnd respectively generating the current single machine shaft speeds of the roller press, the die cutting machine and the winding machine according to the preset conversion method, the adjusted initial speed and the main shaft speed of the winding machine.

In one embodiment, referring to fig. 3, the second stage control module 2 further includes a shaft speed buffer module 27.

And the spindle speed buffer module 27 is used for storing the spindle speed of the stand-alone equipment.

The embodiment of the invention provides a speed control system, which comprises a plurality of single-machine devices, wherein each two single-machine devices are connected through a buffer device; the system comprises: the first-stage control module, the second-stage control module and the third-stage control module are in communication connection; the third-level control module is used for acquiring the adjustment position of each buffer device in real time after the pole piece production device integrated device starts to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjusting position is reached, generating a first feedback speed according to the adjusting position and the first preset adjusting position, and sending the first feedback speed to a corresponding second-stage control module so that the second-stage control module generates the current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to the first-stage control module; the adjusting position is a position of the buffer equipment according to tension adjustment of the pole piece; the first-stage control module is used for adjusting the initial speed according to the second feedback speed and sending the adjusted initial speed to the corresponding second-stage control module so that the second-stage control module generates the corresponding current single machine equipment shaft speed according to the adjusted initial speed; and the second-stage control module is used for controlling the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range. In the mode, the third-stage control module is used for controlling and acquiring the adjusting position of the buffer device, and when the adjusting position reaches the preset adjusting position, the second-stage control module is used for adjusting the shaft speed of the single-machine device, so that the speeds of the single-machine devices in the production process of the battery pole piece are matched, the tension of the pole piece is kept within the preset tension range, and the normal production of the pole piece is ensured.

Embodiment two:

fig. 6 is a flowchart of a speed control method according to a second embodiment of the present invention.

Referring to fig. 6, the speed flow method applied to the above speed control system includes:

step S101, a third-level control module acquires the adjustment positions of all the cache devices in real time after a pole piece production device integrated device begins to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjustment position is reached, generating a first feedback speed according to the first preset adjustment position, and sending the first feedback speed to a corresponding second-stage control module so that the second-stage control module generates the current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to the first-stage control module; the adjusting position is a position automatically adjusted by the buffer device according to the tension of the pole piece.

Step S102, the first-stage control module adjusts the initial speed according to the second feedback speed, and sends the adjusted initial speed to the corresponding second-stage control module, so that the second-stage control module generates the corresponding current single-machine equipment shaft speed according to the adjusted initial speed.

Step S103, the second-stage control module controls the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range.

The embodiment of the invention provides a speed control method, wherein a pole piece production equipment integrated device comprises a plurality of single-machine equipment, and every two single-machine equipment are connected through a buffer equipment; in the mode, the third-stage control module is used for controlling and acquiring the adjusting position of the buffer device, and when the adjusting position reaches the preset adjusting position, the second-stage control module is used for adjusting the shaft speed of the single-machine device, so that the speeds of the single-machine devices in the production process of the battery pole piece are matched, the tension of the pole piece is kept within the preset tension range, and the normal production of the pole piece is ensured.

Embodiment III:

fig. 7 is a schematic diagram of an integrated device of pole piece production equipment according to a third embodiment of the present invention.

Referring to fig. 7 and 8, the pole piece production device integrated device comprises a plurality of single-machine devices 4, a buffer device 5 and the speed control system 6; the speed control system 6 is in communication connection with the stand-alone equipment 4; every two single devices 4 are connected through a buffer device 5.

Here, the stand-alone equipment 4 includes a coater, a roll press, a die cutter, and a winder.

In one embodiment, the buffering device 5 is a dancer assembly.

Here, the buffer device 5 is a take-up shaft, a dancer roller assembly, and a pay-off shaft connected in order. The floating roller assembly consists of a fixed roller and a floating roller, the floating roller is arranged in the tracks on two sides, the shaft ends on two sides of the floating roller are connected with sliding blocks, and the self position of the floating roller assembly is regulated through the balance of tension and self gravity of the roller during working.

The speed of the buffer device 5 is regulated, the buffer device 5 is designed to be driven by a servo motor, and a torque control mode is adopted for servo.

The embodiment of the invention provides an integrated device for pole piece production equipment, which can ensure that the speeds of all single equipment are matched in the production process of a battery pole piece by adjusting the shaft speed of the single equipment, so that the tension of the pole piece is kept within a preset tension range, and the normal production of the pole piece is further ensured.

The computer program product provided by the embodiment of the present invention includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to perform the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment and will not be described herein.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.

In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The speed control system is characterized by being applied to a pole piece production equipment integrated device, wherein the pole piece production equipment integrated device comprises a plurality of single-machine equipment, and every two single-machine equipment are connected through a buffer device; the system comprises: the first-stage control module, the second-stage control module and the third-stage control module are in communication connection;

the third-stage control module is used for acquiring the adjustment position of each buffer device in real time after the pole piece production device integrated device starts to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjusting position is reached, generating a first feedback speed according to the adjusting position and the first preset adjusting position, and sending the first feedback speed to the corresponding second-stage control module so that the second-stage control module generates a current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to the first-stage control module; the adjusting position is a position of the buffer device according to tension adjustment of the pole piece;

The first-stage control module is used for adjusting the initial speed according to the second feedback speed and sending the adjusted initial speed to the corresponding second-stage control module so that the second-stage control module generates the corresponding current single-machine equipment shaft speed according to the adjusted initial speed;

the second-stage control module is used for controlling the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range;

the second-stage control module comprises a plurality of second-stage sub-control modules; the third-level control module comprises a plurality of third-level sub-control modules;

the first preset adjustment position comprises a tape elimination safety position and a tape storage safety position;

the secondary sub-control module further comprises a secondary speed feedback module and a secondary speed adjusting module which are in communication connection, and the tertiary sub-control module further comprises a tertiary speed and position feedback module;

the three-stage speed and position feedback module is used for calculating a position difference value between the adjusting position of the cache device and a preset middle position; when the adjustment position reaches the elimination safety position, determining the first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second speed feedback module corresponding to a first second sub-control module; when the adjustment position reaches the belt storage safety position, determining the first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second-stage speed feedback module corresponding to a second-stage sub-control module; the single machine equipment for transmitting the pole piece to the cache equipment is first single machine equipment, and the first secondary sub-control module is in communication connection with the first single machine equipment; the single-machine equipment for receiving the pole piece transmitted by the buffer equipment is second single-machine equipment, and the second-stage sub-control module is in communication connection with the second single-machine equipment;

The secondary speed adjusting module is used for acquiring the first feedback speed sent by the secondary speed feedback module and generating the current shaft speed of the single machine equipment according to a preset conversion method, the first feedback speed and the shaft speed of the main shaft of the single machine equipment;

the second preset adjustment bit comprises a tape elimination fault bit and a tape storage fault bit;

the first-stage control module comprises a first-stage speed feedback module; the primary speed feedback module is respectively in communication connection with each secondary speed feedback module and each tertiary speed and position feedback module;

the three-stage speed and position feedback module is used for determining the real-time spindle speed corresponding to the first secondary sub-control module as the second feedback speed when the adjustment position reaches the elimination fault position, and sending the second feedback speed to the primary speed feedback module; when the adjustment position reaches the storage fault position, determining that the real-time spindle shaft speed corresponding to the second secondary sub-control module is the second feedback speed, and sending the second feedback speed to the primary speed feedback module;

the primary speed feedback module is used for adjusting the initial speed according to the second feedback speed; when the adjustment position is the elimination fault position, the adjusted initial speed is sent to the second-stage speed feedback module corresponding to the first single-machine equipment to be adjusted; when the adjustment position is the storage fault position, the adjusted initial speed is sent to the second speed feedback module corresponding to the second single machine equipment to be adjusted; in the pole piece production equipment integrated device, each single machine equipment in front of the buffer equipment is the first single machine equipment to be adjusted along the running direction of the pole piece; in the pole piece production equipment integrated device, along the running direction of the pole piece, each single equipment behind the buffer equipment is the second single equipment to be adjusted;

The secondary speed adjusting module is used for acquiring the adjusted initial speed sent by the secondary speed feedback module and generating the current single machine equipment shaft speed according to a preset conversion method, the adjusted initial speed and the main shaft speed.

2. The speed control system according to claim 1, wherein the first stage control module comprises a speed setting module and a speed distribution module in communication; the second-stage control module comprises a plurality of second-stage sub-control modules; each secondary sub-control module comprises a speed acquisition module and a speed control module which are in communication connection; the speed distribution module is in communication connection with the speed acquisition module; the speed setting module is in communication connection with the upper computer; the speed control module is in communication connection with the corresponding single-machine equipment;

the speed setting module is used for obtaining the set speed sent by the upper computer and sending the set speed to the speed distribution module;

the speed distribution module is used for generating the initial speed according to the set speed and sending the initial speed to each secondary sub-control module;

The speed acquisition module is used for sending the acquired initial speed to the speed control module;

the speed control module is used for generating the initial single machine equipment shaft speed corresponding to the current secondary sub-control module according to the initial speed and the preset linear speed-shaft speed corresponding relation, and sending all the initial single machine equipment shaft speeds to the corresponding single machine equipment so that the single machine equipment can operate according to the initial single machine equipment shaft speed.

3. The speed control system according to claim 2, wherein the secondary sub-control module further comprises a tension control module and a shaft speed detection module, the tension control module and the shaft speed detection module being respectively connected to the stand-alone device;

the shaft speed detection module is used for acquiring the main shaft speed and the slave shaft speed of the single-machine equipment;

the tension control module is used for acquiring the pole piece tension of the pole piece passing through the single machine equipment, and adjusting the shaft speed of the single machine equipment until the pole piece tension is in the preset tension range when the pole piece tension is not in the preset tension range and the adjusting position of the buffer equipment adjacent to the single machine equipment is not in the first preset adjusting position.

4. A speed control system according to claim 3, wherein the third level control module comprises a plurality of third level sub-control modules; the three-level sub-control module is in communication connection with the corresponding cache equipment; the three-level sub-control module comprises a shaft speed acquisition module and a tension feedback module;

each third-level sub-control module is in communication connection with a second-level sub-control module corresponding to the single-machine equipment, and the buffer equipment corresponding to the third-level sub-control module is connected with the single-machine equipment;

the shaft speed acquisition module is used for acquiring the shaft speed of the main shaft and the shaft speed of the slave shaft, which are sent by the adjacent secondary sub-control module, in real time;

the tension feedback module is used for acquiring the adjustment position of the buffer equipment in real time.

5. The speed control system of claim 1 wherein the second level control module further comprises a shaft speed buffer module;

and the shaft speed buffer module is used for storing the shaft speed of the main shaft of the single-machine equipment.

6. A speed control method, characterized by being applied to the speed control system according to any one of the preceding claims 1-5; the method comprises the following steps:

The third-level control module acquires the adjustment positions of all the cache devices in real time after the pole piece production device integrated device begins to work; judging whether any adjusting position reaches a first preset adjusting position or a second preset adjusting position; if the first preset adjusting position is reached, generating a first feedback speed according to the adjusting position and the first preset adjusting position, and transmitting the first feedback speed to a corresponding second-stage control module, so that the second-stage control module generates a current single-machine equipment shaft speed according to the first feedback speed; if the second preset adjustment position is reached, generating a second feedback speed according to the second preset adjustment position, and sending the second feedback speed to a first-stage control module; the adjusting position is a position automatically adjusted by the buffer equipment according to the tension of the pole piece;

the first-stage control module adjusts the initial speed according to the second feedback speed and sends the adjusted initial speed to the corresponding second-stage control module so that the second-stage control module generates the corresponding current single-machine equipment shaft speed according to the adjusted initial speed;

The second-stage control module controls the corresponding single machine equipment to operate according to the current single machine equipment shaft speed so as to keep the tension of the pole piece within a preset tension range;

calculating a position difference value between the adjusting position of the cache device and a preset middle position through the three-stage speed and position feedback module; when the adjustment position reaches the elimination safety position, determining the first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second speed feedback module corresponding to a first second sub-control module; when the adjustment position reaches the belt storage safety position, determining the first feedback speed according to the position difference value and a preset feedback speed determining method, and sending the first feedback speed to a second-stage speed feedback module corresponding to a second-stage sub-control module; the single machine equipment for transmitting the pole piece to the cache equipment is first single machine equipment, and the first secondary sub-control module is in communication connection with the first single machine equipment; the single-machine equipment for receiving the pole piece transmitted by the buffer equipment is second single-machine equipment, and the second-stage sub-control module is in communication connection with the second single-machine equipment;

Acquiring the first feedback speed sent by the secondary speed feedback module through the secondary speed adjustment module, and generating the current shaft speed of the single machine equipment according to a preset conversion method, the first feedback speed and the shaft speed of the main shaft of the single machine equipment;

when the adjustment position reaches the elimination fault position, determining that the real-time spindle shaft speed corresponding to the first secondary sub-control module is the second feedback speed through the three-stage speed and position feedback module, and sending the second feedback speed to the primary speed feedback module; when the adjustment position reaches the storage fault position, determining that the real-time spindle shaft speed corresponding to the second secondary sub-control module is the second feedback speed, and sending the second feedback speed to the primary speed feedback module;

adjusting the initial speed according to the second feedback speed through the primary speed feedback module; when the adjustment position is the elimination fault position, the adjusted initial speed is sent to the second-stage speed feedback module corresponding to the first single-machine equipment to be adjusted; when the adjustment position is the storage fault position, the adjusted initial speed is sent to the second speed feedback module corresponding to the second single machine equipment to be adjusted; in the pole piece production equipment integrated device, each single machine equipment in front of the buffer equipment is the first single machine equipment to be adjusted along the running direction of the pole piece; in the pole piece production equipment integrated device, along the running direction of the pole piece, each single equipment behind the buffer equipment is the second single equipment to be adjusted;

7. An integrated pole piece production device, comprising a plurality of stand-alone devices, a buffer device and a speed control system according to any one of claims 1-5; the speed control system is in communication connection with the single-machine equipment; every two single devices are connected through the cache device.

8. The pole piece production facility integrated apparatus of claim 7 wherein the buffer facility is a dancer roll assembly.