Lithium battery pole piece surface defect detection equipment

Abstract

The invention belongs to the technical field of battery pole piece processing, and particularly relates to lithium battery pole piece surface defect detection equipment which comprises a workbench, an industrial camera and an irradiation lamp, the industrial camera and the irradiation lamp are arranged on the workbench, a supporting assembly is installed in the workbench, and an air bag protection assembly is installed on the supporting assembly. The air bag protection assembly comprises a pump body box, a high-elasticity bag body, a fixed base table, an air inlet, an air outlet and an air pressure sensor. According to the invention, air is introduced into the high-elasticity capsule body, so that the high-elasticity capsule body expands and fits the pole piece body, and when the tension of the pole piece body changes, the pole piece body starts to apply pressure to the high-elasticity capsule body and controls the exhaust port to be opened, so that air in the high-elasticity capsule body is exhausted from the exhaust port, and the volume of the high-elasticity capsule body is reduced; the high-elasticity capsule is arranged on the pole piece body to provide a buffer space for the pole piece body, and meanwhile, the high-elasticity capsule is shrunk to tighten the skin of the high-elasticity capsule, so that pole powder on the pole piece body is effectively gathered, and cracks between the pole powder on the pole piece body and a current collector due to tightening of the pole piece body are avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery pole piece processing, and specifically relates to a lithium battery pole piece surface defect detection device. Background Art

[0002] In the battery production process, in order to ensure the quality and safety of the battery, the quality inspection of the battery is very demanding. If defective battery products enter the market, it may cause very serious consequences. On the traditional production line, the manual sampling method is not only inefficient, but also has a high defective rate. On the modern automatic production line, machine vision inspection has obvious advantages, including high accuracy, high efficiency, and strong stability.

[0003] When using the existing pole piece detection device, the pole piece needs to be attached to the roller, and then the pole piece defects are found through a suitable light source and an industrial line scan camera. The pole piece detection device may cause damage to the pole piece during the detection process. The reasons for the damage to the pole piece are as follows: First, there are hard particles between the pole piece and the roller, which causes the hard objects to scratch the pole piece and increase the pole piece damage rate; second, during the winding process of the pole piece, if the traction force of the traction device on the pole piece changes, the pole piece may be tightened, and the pressure of the roller on the pole piece increases, which will cause cracks between the pole powder on the pole piece and the current collector. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium battery pole piece surface defect detection device to solve the technical problems in the prior art in view of the shortcomings of the prior art.

[0005] The object of the present invention can be achieved by the following technical solutions: a lithium battery pole piece surface defect detection device, which includes a workbench and an industrial camera and an irradiation lamp thereon, wherein a rotating roller and a supporting assembly are installed inside the workbench, and a pole piece body is attached to the rotating roller and the supporting assembly, and the pole piece body passes through the bottom of the industrial camera and the irradiation lamp; The support assembly is provided with an airbag protection assembly, which includes a pump box and a highly elastic bladder. A plurality of fixed bases are provided on the pump box, each of which is connected to the highly elastic bladder, and the highly elastic bladder contacts the pole piece body. The pump box is connected to each of the fixed bases through an air inlet and an air outlet, and air pressure sensors are provided in the plurality of fixed bases. A dust collector is installed inside the workbench, and a dust suction port of the dust collector is located on the top of the supporting component.

[0006] As a further optimization or improvement of the present solution, the supporting assembly includes a roller and a fixed frame, the fixed frame is installed on the roller, a retractable upper perforated arc plate is installed in the fixed frame, a lower perforated arc plate is slidably installed on the bottom of the upper perforated arc plate, and the meshes of the upper perforated arc plate and the lower perforated arc plate are staggered; when the upper perforated arc plate is squeezed, the lower perforated arc plate moves laterally along the upper perforated arc plate, so that the meshes of the upper perforated arc plate and the lower perforated arc plate overlap one another.

[0007] As a further optimization or improvement of the present solution, a ventilation mesh is installed on the fixed base, and the fixed base is connected to the high-elasticity bladder through the ventilation mesh.

[0008] As a further optimization or improvement of the present solution, an arc-shaped slide groove is provided in the fixed frame, and the lower perforated arc plate is slidably matched with the arc-shaped slide groove.

[0009] As a further optimization or improvement of the present solution, a sliding sleeve is fixedly installed at the bottom of the upper perforated arc plate, and the sliding sleeve is slidably matched with the lower perforated arc plate.

[0010] As a further optimization or improvement of the present solution, guide pillars are installed in the fixed frame, both ends of the upper perforated arc plate are slidably matched with the guide pillars, and the upper perforated arc plate is connected to the fixed frame via a lightweight spring.

[0011] As a further optimization or improvement of the present solution, a U-shaped frame is installed on the workbench, and the industrial camera and the irradiation lamp are installed on the U-shaped frame.

[0012] Beneficial effects of the present invention: (1) The present invention ventilates the fixed base and the interior of the high-elastic capsule through the air inlet, so that the high-elastic capsule expands and fits the electrode body. When the tension of the electrode body changes, the electrode body begins to tighten and exerts pressure on the high-elastic capsule. At this time, the air pressure sensor senses the increase in air pressure inside the high-elastic capsule and controls the exhaust port to open, so that the gas inside the high-elastic capsule is discharged from the exhaust port. The volume of the high-elastic capsule is reduced, providing a buffer space for the electrode body. At the same time, because the high-elastic capsule fits the surface of the electrode body, when the high-elastic capsule shrinks, the surface of the high-elastic capsule is tightened, thereby effectively gathering the electrode powder on the electrode body, avoiding cracks between the electrode powder and the collector due to the tightening of the electrode body.

[0013] (2) If there are hard particles between the high-elastic capsule and the pole piece body, the pole piece body will press the hard particles into the high-elastic capsule because the material of the high-elastic capsule itself is relatively soft, preventing the hard particles from piercing the foil of the pole piece body and embedding the hard particles into the high-elastic capsule. At this time, the corresponding air pressure sensor can sense the increase in air pressure inside the high-elastic capsule, and then the exhaust port opens, and the gas inside the high-elastic capsule is exhausted from the exhaust port. At this time, the surface of the high-elastic capsule gradually tightens and wrinkles, and the hard particles are wrapped by the high-elastic capsule. As the gas in the high-elastic capsule is discharged, the high-elastic capsule drives the hard particles to separate from the pole piece body, preventing the hard particles from scratching the pole piece body as the support assembly rotates.

[0014] (3) When the present invention is in use, the support assembly rotates to drive the upper perforated arc plate to gradually fit the pole piece body, so that the pole piece body presses against the upper perforated arc plate, and the upper perforated arc plate is pressed until it is flush with the fixed frame. During this process, the lower perforated arc plate slides relatively along the upper perforated arc plate under the action of the arc-shaped slide groove, so that the mesh holes on the upper perforated arc plate and the lower perforated arc plate gradually overlap; if there are debris attached to the surface of the pole piece body, the debris attached to the surface of the pole piece body will pass through the upper perforated arc plate and the lower perforated arc plate. The mesh of the arc plate rotates with the support assembly. When the pole piece body is separated from the upper perforated arc plate, the lightweight spring rebounds to drive the upper perforated arc plate to reset. At the same time, the lower perforated arc plate moves relatively, and the mesh holes on the lower perforated arc plate and the upper perforated arc plate are staggered, so that the mesh holes on the lower perforated arc plate and the upper perforated arc plate can shear the debris adhered to the pole piece body, separate the debris from the pole piece body, avoid the debris adhered to the pole piece body from piercing the pole piece body, and realize the removal of the debris on the pole piece body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a cross-sectional view of the internal structure of the workbench.

[0018] Figure 3 Schematic diagram of the internal structure of the workbench.

[0019] Figure 4 It is a schematic diagram of the structure of the support component and the airbag protection component.

[0020] Figure 5 It is a cross-sectional view of the rolled structure.

[0021] Figure 6 It is a schematic diagram of the connection structure between the support component and the airbag protection component.

[0022] Figure 7 A schematic diagram of the supporting component structure.

[0023] Figure 8 for Figure 7 Schematic diagram of the A part structure.

[0024] Fig. 9 It is a schematic diagram of the airbag protection component structure.

[0025] Fig.10 for Fig. 9 Schematic diagram of the structure of part B.

[0026] The following are marked in the figure: 1. Workbench; 2. U-shaped frame; 3. Industrial camera; 4. Rotating roller; 5. Pole piece body; 6. Support assembly; 601. Roller; 602. Fixed frame; 603. Arc slide; 604. Sleeve; 605. Upper perforated arc plate; 606. Lower perforated arc plate; 607. Guide column; 608. Light spring; 7. Dust collector; 8. Illumination lamp; 9. Air bag protection assembly; 901. Pump box; 902. Fixed base; 903. High elastic bladder; 904. Ventilation mesh; 905. Air pressure sensor; 906. Air inlet; 907. Exhaust port. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 10 , a lithium battery pole piece surface defect detection device, comprising a workbench 1 and an industrial camera 3 and an irradiation lamp 8 thereon, wherein a rotating roller 4 and a supporting assembly 6 are installed inside the workbench 1, and a pole piece body 5 is attached to the rotating roller 4 and the supporting assembly 6, and the pole piece body 5 passes through the bottom of the industrial camera 3 and the irradiation lamp 8; The support assembly 6 is provided with an airbag protection assembly 9, which includes a pump box 901 and a high elastic capsule 903. A plurality of fixed bases 902 are provided on the pump box 901, each of which is connected to the high elastic capsule 903, and the high elastic capsule 903 contacts the pole piece body 5. The pump box 901 is connected to each of the fixed bases 902 through an air inlet 906 and an air outlet 907, and air pressure sensors 905 are provided in the plurality of fixed bases 902. A dust collector 7 is installed inside the workbench 1 , and a dust suction port of the dust collector 7 is located on the top of the supporting assembly 6 .

[0029] Specifically, a U-shaped frame 2 is installed on the workbench 1 , and the industrial camera 3 and the irradiation lamp 8 are installed on the U-shaped frame 2 .

[0030] It should be noted that when all the air pressure sensors 905 on the pump box 901 sense an increase in the air pressure inside the high elastic capsule 903, it may indicate a change in the tension of the pole piece body 5; if individual air pressure sensors 905 sense an increase in the air pressure inside the high elastic capsule 903, it may be that there are hard particles between the high elastic capsule 903 and the pole piece body 5. Since the material of the high elastic capsule 903 is highly elastic and relatively soft, it is difficult to provide support for the rotation of the pole piece body 5. Therefore, the roller 601 and the fixed frame 602 provide rotation support for the pole piece body 5, and the high elastic capsule 903 is inflated to make the high elastic capsule 903 fit the pole powder on the pole piece body 5.

[0031] The highly elastic capsule 903 is made of a latex material with relatively high elasticity. The present invention mainly ventilates the fixed base 902 and the highly elastic capsule 903 through the air inlet 906, so that the highly elastic capsule 903 expands and fits the pole piece body 5. When the tension of the pole piece body 5 changes, the pole piece body 5 begins to tighten and exerts pressure on the highly elastic capsule 903. At this time, the air pressure sensor 905 senses the increase in the internal air pressure of the highly elastic capsule 903 and controls the exhaust port 907 to open, so that the internal gas of the highly elastic capsule 903 is discharged from the exhaust port 907, and the volume of the highly elastic capsule 903 is reduced, providing a buffer space for the pole piece body 5. At the same time, because the highly elastic capsule 903 fits the surface of the pole piece body 5, when the highly elastic capsule 903 shrinks, the epidermis of the highly elastic capsule 903 is tightened, thereby effectively gathering the pole powder on the pole piece body 5, and avoiding the formation of cracks between the pole powder and the collector due to the tightening of the pole piece body 5.

[0032] If there are hard particles between the highly elastic capsule 903 and the pole piece body 5, since the material of the highly elastic capsule 903 itself is relatively soft, the pole piece body 5 will press the hard particles into the highly elastic capsule 903 to prevent the hard particles from piercing the foil of the pole piece body 5. At this time, the hard particles are embedded in the corresponding air pressure sensor 905, which can sense the increase in air pressure inside the highly elastic capsule 903. Then the exhaust port 907 opens, and the gas inside the highly elastic capsule 903 is exhausted from the exhaust port 907. At this time, the surface of the highly elastic capsule 903 gradually tightens and wrinkles, and the hard particles are wrapped by the highly elastic capsule 903. As the gas in the highly elastic capsule 903 is discharged, the highly elastic capsule 903 drives the hard particles to separate from the pole piece body 5, to prevent the hard particles from scratching the pole piece body 5 as the support assembly 6 rotates.

[0033] It should be noted that the dust collector 7 is used to absorb debris on the high-elastic capsule 903, and the dust suction port of the dust collector 7 cannot be directly aimed at the pole piece body 5. Since the inspection of the pole piece body 5 is an operation immediately after the coating of the pole piece body 5, if the dust suction port of the dust collector 7 is aimed at the pole piece body 5, it is very likely that the pole powder coated on the pole piece body 5 will be sucked away, resulting in uneven pole powder on the surface of the pole piece body 5, seriously affecting the quality of the pole piece body 5.

[0034] See also Figure 4-Figure 8 The supporting assembly 6 includes a roller 601 and a fixed frame 602. The fixed frame 602 is installed on the roller 601. A retractable upper perforated arc plate 605 is installed in the fixed frame 602. A lower perforated arc plate 606 is slidably installed at the bottom of the upper perforated arc plate 605. The meshes of the upper perforated arc plate 605 and the lower perforated arc plate 606 are staggered; when the upper perforated arc plate 605 is squeezed, the lower perforated arc plate 606 moves laterally along the upper perforated arc plate 605, so that the meshes of the upper perforated arc plate 605 and the lower perforated arc plate 606 gradually overlap.

[0035] Specifically, an arc-shaped slide groove 603 is provided in the fixing frame 602 , and the lower perforated arc plate 606 is slidably matched with the arc-shaped slide groove 603 .

[0036] Specifically, a sliding sleeve 604 is fixedly installed at the bottom of the upper perforated arc plate 605 , and the sliding sleeve 604 is slidably matched with the lower perforated arc plate 606 .

[0037] In the initial state, the mesh holes on the lower perforated arc plate 606 and the upper perforated arc plate 605 are staggered. When the upper perforated arc plate 605 is pressed, the lower perforated arc plate 606 at the bottom of the upper perforated arc plate 605 slides relatively, so that the mesh holes on the upper perforated arc plate 605 and the lower perforated arc plate 606 gradually overlap.

[0038] When the present invention is in use, the support assembly 6 rotates to drive the upper perforated arc plate 605 to gradually fit the pole piece body 5, so that the pole piece body 5 presses the upper perforated arc plate 605, and presses the upper perforated arc plate 605 to a state flush with the fixed frame 602. During this process, the lower perforated arc plate 606 slides relatively along the upper perforated arc plate 605 under the action of the arc-shaped slide groove 603, so that the mesh holes on the upper perforated arc plate 605 and the lower perforated arc plate 606 gradually overlap; if there are debris attached to the surface of the pole piece body 5, the debris attached to the surface of the pole piece body 5 will pass through the upper perforated arc plate 605 and the lower perforated arc plate 606. The mesh of plate 606 rotates with the support assembly 6. When the pole piece body 5 is separated from the upper perforated arc plate 605, the lightweight spring 608 rebounds and drives the upper perforated arc plate 605 to reset. At the same time, the lower perforated arc plate 606 moves relatively, and the meshes on the lower perforated arc plate 606 and the upper perforated arc plate 605 are staggered, so that the meshes on the lower perforated arc plate 606 and the upper perforated arc plate 605 can shear the debris adhered to the pole piece body 5, separate the debris from the pole piece body 5, avoid the debris adhered to the pole piece body 5 from piercing the pole piece body 5, and realize the removal of the debris on the pole piece body 5.

[0039] See also Fig.10 A ventilation mesh plate 904 is installed on the fixed base 902 , and the fixed base 902 is connected to the high elastic capsule 903 through the ventilation mesh plate 904 .

[0040] It should be noted that the function of the ventilation mesh plate 904 is to protect the high elastic bladder 903 and prevent the high elastic bladder 903 from over-contracting, which would cause the high elastic bladder 903 to deform when the high elastic bladder 903 is inflated again.

[0041] See also Figure 8 , guide pillars 607 are installed in the fixed frame 602, and both ends of the upper perforated arc plate 605 are slidably matched with the guide pillars 607, and the upper perforated arc plate 605 is connected to the fixed frame 602 through a light spring 608. It should be noted that the elastic coefficient of the light spring 608 is small, and the upper perforated arc plate 605 and the lower perforated arc plate 606 are made of light materials. Therefore, when the pole piece body 5 presses the upper perforated arc plate 605, it can be easily pressed to a flush state with the fixed frame 602, reducing the influence of the pole piece body 5 pressing the upper perforated arc plate 605 on its own material.

[0042] The implementation principle of the present invention is: When all the air pressure sensors 905 on the pump body box 901 sense an increase in the air pressure inside the highly elastic bladder 903, it is possible that the tensioning force of the pole piece body 5 has changed; if individual air pressure sensors 905 sense an increase in the air pressure inside the highly elastic bladder 903, it is possible that there are hard particles between the highly elastic bladder 903 and the pole piece body 5.

[0043] The present invention ventilates the interior of the fixed base 902 and the high-elastic capsule 903 through the air inlet 906, so that the high-elastic capsule 903 expands and fits the pole piece body 5. When the tension of the pole piece body 5 changes, the pole piece body 5 begins to tighten and exerts pressure on the high-elastic capsule 903. At this time, the air pressure sensor 905 senses the increase in the air pressure inside the high-elastic capsule 903 and controls the exhaust port 907 to open, so that the gas inside the high-elastic capsule 903 is discharged from the exhaust port 907, and the volume of the high-elastic capsule 903 is reduced, providing a buffer space for the pole piece body 5. At the same time, because the high-elastic capsule 903 fits the surface of the pole piece body 5, when the high-elastic capsule 903 shrinks, the skin of the high-elastic capsule 903 is tightened, thereby effectively gathering the pole powder on the pole piece body 5 to avoid cracks between the pole powder and the collector due to the tightening of the pole piece body 5.

[0044] If there are hard particles between the high elastic capsule 903 and the pole piece body 5, since the material of the high elastic capsule 903 itself is relatively soft, the pole piece body 5 presses the hard particles into the high elastic capsule 903 to prevent the hard particles from piercing the foil of the pole piece body 5, so that the hard particles are embedded in the high elastic capsule 903. At this time, the corresponding air pressure sensor 905 can sense the increase in air pressure inside the high elastic capsule 903, and then the exhaust port 907 is opened, and the gas inside the high elastic capsule 903 is exhausted from the exhaust port 907. At this time, the high elastic capsule 903 is The surface of the body 903 gradually tightens and wrinkles, and the hard particles are wrapped by the high-elastic capsule 903. As the gas in the high-elastic capsule 903 is discharged, the high-elastic capsule 903 drives the hard particles to separate from the electrode body 5, so as to prevent the hard particles from scratching the electrode body 5 as the support component 6 rotates. As the support component 6 rotates, when the high-elastic capsule 903 wrapping the hard particles is about to approach the dust collector 7, air is inflated into the high-elastic capsule 903 through the air inlet 906, so that the hard particles are separated from the high-elastic capsule 903 and absorbed by the dust collector 7.

[0045] Specifically, the support assembly 6 rotates to drive the upper perforated arc plate 605 to gradually fit the pole piece body 5, so that the pole piece body 5 presses the upper perforated arc plate 605, and presses the upper perforated arc plate 605 to a state flush with the fixed frame 602. In this process, the lower perforated arc plate 606 slides relatively along the upper perforated arc plate 605 under the action of the arc-shaped slide groove 603, so that the mesh holes on the upper perforated arc plate 605 and the lower perforated arc plate 606 gradually overlap; if there are debris attached to the surface of the pole piece body 5, the debris attached to the surface of the pole piece body 5 will pass through the upper perforated arc plate 605 and the lower perforated arc plate 6 06, as the support assembly 6 rotates, when the pole piece body 5 is separated from the upper perforated arc plate 605, the lightweight spring 608 rebounds and drives the upper perforated arc plate 605 to reset. At the same time, the lower perforated arc plate 606 moves relatively, and the mesh holes on the lower perforated arc plate 606 and the upper perforated arc plate 605 are staggered, so that the mesh holes on the lower perforated arc plate 606 and the upper perforated arc plate 605 can shear the debris adhered to the pole piece body 5, separate the debris from the pole piece body 5, avoid the debris adhered to the pole piece body 5 from piercing the pole piece body 5, and realize the removal of the debris on the pole piece body 5.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A lithium battery pole piece surface defect detection device, characterized in that: It comprises a workbench (1) and an industrial camera (3) and an irradiation lamp (8) thereon, wherein a rotating roller (4) and a support assembly (6) are installed inside the workbench (1), a pole piece body (5) is attached to the rotating roller (4) and the support assembly (6), and the pole piece body (5) passes through the bottom of the industrial camera (3) and the irradiation lamp (8); An airbag protection assembly (9) is installed on the support assembly (6), the airbag protection assembly (9) comprising a pump body box (901) and a high elastic capsule (903), a plurality of fixed bases (902) are installed on the pump body box (901), each fixed base (902) is connected to the high elastic capsule (903), the high elastic capsule (903) contacts the pole piece body (5), the pump body box (901) is connected to each fixed base (902) via an air inlet (906) and an air outlet (907), and air pressure sensors (905) are installed in the plurality of fixed bases (902); A dust collector (7) is installed inside the workbench (1), and a dust suction port of the dust collector (7) is located on the top of the support assembly (6).

2. The lithium battery pole piece surface defect detection device according to claim 1, characterized in that: The support assembly (6) comprises a roller (601) and a fixed frame (602), the fixed frame (602) being mounted on the roller (601), a retractable upper perforated arc plate (605) being mounted in the fixed frame (602), a lower perforated arc plate (606) being slidably mounted on the bottom of the upper perforated arc plate (605), and meshes of the upper perforated arc plate (605) and the lower perforated arc plate (606) being staggered; When the upper perforated arc plate (605) is squeezed, the lower perforated arc plate (606) moves laterally along the upper perforated arc plate (605), so that the meshes of the upper perforated arc plate (605) and the lower perforated arc plate (606) gradually overlap.

3. The lithium battery pole piece surface defect detection device according to claim 1, characterized in that: A ventilation mesh plate (904) is installed on the fixed base (902), and the fixed base (902) is connected to the high-elasticity bladder (903) through the ventilation mesh plate (904).

4. The lithium battery pole piece surface defect detection device according to claim 2, characterized in that: An arc-shaped slide groove (603) is provided in the fixing frame (602), and the lower perforated arc plate (606) is slidably matched with the arc-shaped slide groove (603).

5. The lithium battery pole piece surface defect detection device according to claim 4, characterized in that: A sliding sleeve (604) is fixedly mounted on the bottom of the upper perforated arc plate (605), and the sliding sleeve (604) is slidably matched with the lower perforated arc plate (606).

6. A lithium battery pole piece surface defect detection device according to claim 5, characterized in that: A guide column (607) is installed in the fixed frame (602), and both ends of the upper perforated arc plate (605) are slidably matched with the guide column (607). The upper perforated arc plate (605) is connected to the fixed frame (602) via a light spring (608).

7. The lithium battery pole piece surface defect detection device according to claim 1, characterized in that: A U-shaped frame (2) is installed on the workbench (1), and an industrial camera (3) and an irradiation lamp (8) are installed on the U-shaped frame (2).

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