CN219187518U

CN219187518U - Intelligent back suction system and coating equipment

Info

Publication number: CN219187518U
Application number: CN202223033937.8U
Authority: CN
Inventors: 朱高稳; 万斌; 解健; 蒋磊
Original assignee: Guangdong Jiatuo Automation Technology Co ltd
Current assignee: Guangdong Jiatuo Automation Technology Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-06-16
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses an intelligent back suction system and coating equipment, which comprises a die head, a feeding pipeline and a back flow pipeline, wherein a coating valve is further arranged on the feeding pipeline, a screw valve is further arranged on the back flow pipeline, the screw valve is used for controlling the back flow of the back flow pipeline, and the coating valve is used for controlling the die head to coat on a pole piece; the control system is used for controlling the die head and valves on the feeding pipeline and the backflow pipeline, and a first pressure sensor is further arranged on the backflow pipeline and used for sensing the pressure in the backflow pipeline when the die head is coated. A pressure sensor is arranged between the screw valve and the die head, and the amount of paint in the coating process is detected by the pressure sensor and is transmitted to a control system. And then, confirming the real-time pressure in the pipeline and the die cavity through three pressure sensors, controlling the flow of the slurry through the positive and negative rotation of the motor, and adjusting the parameters of the motor, thereby achieving the size requirement of head and tail thinning and realizing the digital fine control of the head and tail thinning size.

Description

Intelligent back suction system and coating equipment

Technical Field

The utility model relates to the field of pole piece coating, in particular to an intelligent back suction system and coating equipment.

Background

Pole piece coating generally refers to a process of uniformly coating a uniformly stirred slurry on a current collector and drying an organic solvent in the slurry. The coating effect has important influence on the capacity, internal resistance, cycle life and safety of the battery, and ensures that the pole pieces are uniformly coated. The choice of coating mode and control parameters have important influence on the performance of the lithium ion battery. The coating system commonly used at the present stage is simpler, the thickness sizes of the head and the tail of the gap coating pole piece are not well controlled, but the size requirements of the battery industry on the head and the tail thinning of the pole piece are higher and higher, and the existing coating system cannot meet the size requirements.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides an intelligent back suction system and coating equipment, wherein the intelligent back suction system is provided with a back suction valve and a pressure sensor and used for controlling the coating quantity at a die head.

The technical scheme adopted for solving the technical problems is as follows: the intelligent back suction system comprises a die head, a feeding pipeline and a back flow pipeline, wherein a coating valve is further arranged on the feeding pipeline, a screw valve is further arranged on the back flow pipeline and used for controlling back flow of the back flow pipeline, and the coating valve is used for controlling the die head to coat on the pole piece; the die head, the feeding pipeline and the backflow pipeline are all connected with a control system, the control system is used for controlling the die head, the feeding pipeline and valves on the backflow pipeline, a first pressure sensor is further arranged on the backflow pipeline, and the first pressure sensor is used for sensing pressure in the backflow pipeline during die head coating.

As an improvement of the above technical solution, the first pressure sensor is located at a position between the screw valve and the die head.

As a further improvement of the above technical solution, a screw valve is also provided on the feed pipe, said screw valve being located between the coating valve and the die head and being used for controlling the feed and return flow in the feed pipe.

As a further improvement of the technical scheme, a second pressure sensor is arranged between the screw valve on the feeding pipe and the die head, and the second pressure sensor is used for sensing the pressure between the die head and the screw valve.

As a further improvement of the technical scheme, the screw valve is also connected with a storage tank, and the screw valves on the feeding pipeline and the return pipeline are both connected with the storage tank.

As a further improvement of the technical scheme, the screw valve comprises a stator, a rotor and a motor, wherein the rotor is connected with the motor, a connecting structure is further arranged between the rotor and the motor, and a shell is further arranged outside the stator, the rotor and the motor.

As a further improvement of the above technical solution, the housing includes a bearing housing, a suction chamber, and a stator cavity disposed in the suction chamber, the stator being located in the stator cavity.

As a further improvement of the technical scheme, the outside of the stator cavity is also provided with a discharge body, the discharge body is used for discharging the glue leakage, the bearing seat is also provided with a glue leakage observation hole, and the glue leakage observation hole is used for observing the glue leakage condition in the screw valve.

As a further improvement of the technical scheme, the connecting structure comprises a connecting shaft and a coupler, wherein the connecting shaft is a flexible shaft, and a sealing structure is further arranged on the connecting shaft and is used for sealing between the suction chamber and the bearing seat.

And a coating device, which is manufactured by adopting the intelligent back suction system.

The beneficial effects are that: the back suction coating system and the coating equipment are provided with the screw valve and the back flow pipeline, redundant coating in the coating process is refluxed, and the pressure sensor is arranged between the screw valve and the die head, and the coating quantity in the coating process is detected through the pressure sensor and is transmitted to the control system. And then, confirming the real-time pressure in the pipeline and the die cavity through three pressure sensors, controlling the flow of the slurry through the positive and negative rotation of the motor, and adjusting the parameters of the motor, thereby achieving the size requirement of head and tail thinning and realizing the digital fine control of the head and tail thinning size.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic illustration of the structure of a screw valve of the present utility model;

FIG. 3 is a schematic cross-sectional view of a screw valve according to the present utility model.

1. A die head; 2. a feed conduit; 3. a return line; 4. a coating valve; 5. a first pressure sensor; 6. a second pressure sensor; 7. a screw valve; 71. a bearing seat; 72. a stator cavity; 73. a suction chamber.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all the coupling/connection relationships referred to in the patent are not direct connection of the single-finger members, but rather, it means that a better coupling structure can be formed by adding or subtracting coupling aids depending on the specific implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

Referring to fig. 1, an intelligent back suction system is provided with a die head 1, a feeding pipeline 2 and a back flow pipeline 3, wherein a coating valve 4 is further arranged on the feeding pipeline 2, a screw valve 7 is further arranged on the back flow pipeline 3, the screw valve 7 is used for controlling back flow of the back flow pipeline 3, and the coating valve 4 is used for controlling coating of the die head 1 on a pole piece. The die head 1, the feeding pipeline 2 and the reflux pipeline 3 are all connected with a control system, the control system is used for controlling the die head 1, the feeding pipeline 2 and the valves on the reflux pipeline 3, the die head 1 is equivalent to a small container for storing slurry, the slurry is sprayed out from the lip of the die head 1, and the slurry is uniformly coated on copper foil or aluminum foil to form a positive pole piece or a negative pole piece. The cavity slurry in the die head 1 can be discharged from the reflux port and the lip. The feeding pipeline 2 and the reflux pipeline 3 are respectively arranged at two sides of the die head 1, the feed cylinder is connected with the feeding pipeline 2, when the pole piece needs to be coated, the coating valve 4 is opened through the control system, slurry flows from the feeding pipeline 2 to the die head 1, and the pole piece is coated through the die head. The slurry flowing out of the feeding pipeline 2 in the coating process can not be fully coated on the pole piece, and at the moment, the screw valve 7 on the return pipeline 3 can have a back suction effect on the slurry on the die head 1, so that the redundant slurry at the die head 1 flows back through the return pipeline 3.

In addition, when the excessive slurry on the die head 1 is recovered, it is difficult to control the recovery amount, so that the slurry at the die head 1 is more, resulting in thicker pole piece coating. Therefore, the first pressure sensor 5 is further arranged on the return pipe 3, and the first pressure sensor 5 is used for sensing the pressure in the return pipe 3 when the die head 1 is coated. The first pressure sensor 5 is located at a position between the screw valve 7 and the die head 1. The pressure sensor provided on the suck-back system can cause a current change by a pressure change, and is converted from an analog quantity to a digital quantity to be displayed on a control system (PLC). Therefore, the pressure sensor can display whether the pressure at the die head 1 meets the head-tail thinning requirement in the current die head coating state, if not, the control system controls the back suction valve to fill or back suck the slurry into the pipeline slurry, so that the pressure is changed, the changed pressure is transmitted to the control system, and compared with the preset pressure and then the pressure is adjusted, so that the purpose of thinning or thickening during coating at the die head 1 is achieved. In addition, when the adjustment is carried out, the back suction valve is switched along with the coating action, and the signal point is taken as the signal point for switching the coating action, so that the coating back flow is consistent with the back suction valve action.

For cooperation with the screw valve 7 and the pressure sensor on the return line 3, the screw valve 7 is also arranged on the feed line 2, which screw valve 7 is located between the coating valve 4 and the die head 1 and is used for controlling the feed and return in the feed line 2. A second pressure sensor 6 is also arranged between the screw valve 7 on the feeding pipe and the die head 1, and the second pressure sensor 6 is used for sensing the pressure between the die head 1 and the screw valve 7. The screw valve 7 on the feeding pipeline 2 not only can suck the slurry in the feed cylinder into the feeding pipeline 2, but also can play a role in sucking back the redundant slurry in the coating process, and by detecting through the second sensor, the screw valve 7 on the return pipeline 3 is matched with the slurry, so that a space with stable pressure intensity is formed, and the two pressure sensors detect simultaneously, so that the pressure balance at two sides of the die head 1 is ensured, and the coating quantity can be better and more accurately controlled.

Referring to fig. 2 and 3, the screw valve 7 includes a stator, a rotor and a motor, the rotor is connected with the motor, a connection structure is further provided between the rotor and the motor, and a housing is further provided outside the stator, the rotor and the motor. The screw valve 7 is suitable for small flow medium transportation, adopts an eccentric spiral structure design, and continuously, uniformly and constantly discharges glue in a closed cavity formed between the screw and the stator along a rotor spiral line through planetary rotation of the rotor around an axis in a stator cavity. The conveying process does not have shearing action on the medium, so that the property of the medium is not affected. Meanwhile, the back suction function of the medium can be easily realized through the reverse rotation of the motor, the cleanliness of the medium and the material is ensured, and the problems of dripping and wiredrawing of the medium are completely solved.

In addition, the housing of the screw valve 7 comprises a bearing housing 71, a suction chamber 73 and a stator chamber 72, the stator chamber 72 being arranged in the suction chamber 73, the stator being located in the stator chamber 72. The interior gripping of stator chamber 72 is used for installing stator and rotor, the outside of stator chamber 72 still is provided with the discharge body, the discharge body is used for leaking the discharge of gluing, still be provided with on the bearing frame 71 and leak the gluey observation hole, leak the gluey condition of leaking that the observation hole is used for observing in the screw valve 7, be convenient for observe and detect the screw valve 7 like this, in time handle the hourglass and glue.

Since the screw valve 7 of the present application is an elongated screw valve 7, the distance between the motor and the rotor is long, and therefore, a connecting shaft needs to be provided between the motor shaft of the motor and the rotor. The connecting structure comprises a connecting shaft and a coupler, and the connecting shaft is a flexible shaft. The flexible shaft is a shaft having an operating speed above a first threshold speed and below a second threshold speed. There is also an axis above the second threshold rotational speed. The flexible shaft is convenient to install, compact in structure, capable of transmitting motion and power in a longer distance, convenient to move and suitable for the screw valve 7. The connecting shaft is also provided with a sealing structure for sealing between the suction chamber 73 and the bearing housing 71. The sealing structure comprises a sealing ring, a sealing gasket and a sealing ring, wherein the sealing ring is arranged at one end of the bearing, the sealing gasket is arranged on the sealing ring, and the double-layer sealing can achieve a better sealing effect.

In addition, when the coating equipment adopting the back suction system is used for coating pole pieces, the flow of slurry can be controlled through the positive and negative rotation of the motor, the motor parameters are adjusted, the size requirement of head and tail thinning is met, the digital fine control of the head and tail thinning size is realized, the use is more convenient, and the production quality of the equipment is higher.

While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications or substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims

1. An intelligent suck-back system, which is characterized in that: the device comprises a die head, a feeding pipeline and a backflow pipeline, wherein a coating valve is further arranged on the feeding pipeline, a screw valve is further arranged on the backflow pipeline and used for controlling backflow of the backflow pipeline, and the coating valve is used for controlling the die head to coat on the pole piece; the die head, the feeding pipeline and the backflow pipeline are all connected with a control system, the control system is used for controlling the die head, the feeding pipeline and valves on the backflow pipeline, a first pressure sensor is further arranged on the backflow pipeline, and the first pressure sensor is used for sensing pressure in the backflow pipeline during die head coating.

2. An intelligent suck-back system according to claim 1, wherein: the first pressure sensor is located at a position between the screw valve and the die head.

3. An intelligent suck-back system according to claim 1, wherein: the feed line is also provided with a screw valve located between the coating valve and the die head and used to control feed and return flow within the feed line.

4. An intelligent suck-back system according to claim 3, wherein: and a second pressure sensor is arranged between the screw valve on the feeding pipe and the die head and is used for sensing the pressure between the die head and the screw valve.

5. An intelligent suck-back system according to claim 3, wherein: the screw valve is also connected with a storage tank, and the screw valves on the feeding pipeline and the return pipeline are both connected with the storage tank.

6. An intelligent suck-back system according to claim 1, wherein: the screw valve comprises a stator, a rotor and a motor, wherein the rotor is connected with the motor, a connecting structure is further arranged between the rotor and the motor, and a shell is further arranged outside the stator, the rotor and the motor.

7. The intelligent suck-back system of claim 6, wherein: the housing comprises a bearing seat, a suction chamber and a stator cavity, wherein the stator cavity is arranged in the suction chamber, and the stator is positioned in the stator cavity.

8. The intelligent suck-back system of claim 7, wherein: the outside in stator chamber still is provided with the discharge body, the discharge body is used for leaking the discharge of gluing, still be provided with on the bearing frame and leak the gluey observation hole, leak the gluey observation hole and be used for observing the circumstances of leaking the gluey in the screw valve.

9. The intelligent suck-back system of claim 7, wherein: the connecting structure comprises a connecting shaft and a coupling, wherein the connecting shaft is a flexible shaft, a sealing structure is further arranged on the connecting shaft and used for sealing between the suction chamber and the bearing seat.

10. A coating apparatus characterized in that: a smart back suction system comprising any of claims 1-9.