Visual detection equipment and detection method for battery pole piece coating

Abstract

The invention discloses battery pole piece coating visual detection equipment and a detection method, and relates to the technical field of lithium battery detection. An electrical room is arranged on one side of the main frame, a power supply box is installed on one side of the electrical room, an operation room is arranged on the side, away from the electrical room, of the main frame, two inner plates are fixedly connected to the middle of the main frame, a roll control mechanism is installed between the two inner plates, a deviation rectifying assembly is installed on one side of one inner plate, and an inspection assembly is installed on one side of the top of the inner plate. Observation doors are installed on the two sides of the operation room. The winding structure and the inspection structure of the battery pole piece are integrated in the main frame, so that the battery pole piece inspection device is suitable for detection of small and micro units, the winding control mechanism and the correction assembly are matched with the inspection assembly to accurately detect the electrode piece, and the detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery detection, and in particular to a battery pole piece coating visual detection device and a detection method. Background Art

[0002] The inspection of battery pole piece coating is an important part of ensuring the quality and performance of lithium batteries. The uniformity, adhesion and presence of defects of the coating directly affect the electrochemical performance and safety of the battery. Therefore, the corresponding inspection equipment is required to inspect the pole piece quality before installation.

[0003] The patent specification with publication number CN113522764A discloses a lithium battery pole piece coating distribution detection device, which includes two groups of support seats, each group of support seats is provided with multiple groups of driving teeth in the middle, and each group of driving teeth is rotatably connected to the support seat through a connecting shaft, and a detection camera is installed above the two groups of support seats, and multiple groups of transmission plates are sleeved on the outer side of the driving teeth, and a connecting shaft is fixed to the bottom end of each group of transmission plates; When the device is testing, the detection method adopted is to use a conveyor belt to convey each cut battery electrode one by one to the bottom of a fixed-point camera. The shortcomings of this technical solution are that, first, this detection method is only suitable for large enterprises with large production plants. Its winding, cutting, and testing all require a large production site. At this stage, lithium battery electrodes are common components and their production sites are diverse. When faced with the needs of small enterprise testing, university laboratory demonstration testing, etc., this detection method is not applicable, that is, this detection method cannot realize the integrated function of winding and testing in a small space; secondly, the camera used by the device during testing is fixed-point detection, and fixed-point detection with a fixed position and fixed angle has the problem of missing the detection position, resulting in low accuracy of the detection result. Summary of the invention

[0004] The purpose of the present invention is to provide a battery pole piece coating visual inspection device and inspection method. The technical problems to be solved are as follows: When inspecting existing battery pole pieces, the inspection position is fixed, resulting in inaccurate inspection results and inability to adapt to the inspection needs of smaller places.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A battery pole piece coating visual inspection device comprises a main frame, an electrical room is arranged on one side of the main frame, a power supply box is installed on one side of the electrical room, an operation room is arranged on the side of the main frame away from the electrical room, two inner plates are fixedly connected to the middle of the main frame, a winding control mechanism is installed between the two inner plates, a deviation correction component is installed on one side of one of the inner plates, the deviation correction component is used to correct the position of the battery pole piece, and an inspection component is installed on one side of the top of the inner plate, the inspection component is used to inspect the battery pole piece at multiple angles; a control component is arranged at the bottom of the operation room, the control component is used to electrically control the winding control mechanism, the deviation correction component and the inspection component, and observation doors are installed on both sides of the operation room.

[0006] As a further solution of the present invention: an inspection door is provided on a side of the electrical room away from the observation door, visual panels are installed on both sides and the top of the observation door that are perpendicular to each other and are rotatably connected to the main frame, and a handle is installed on one side of the observation door.

[0007] As a further solution of the present invention: the winding control mechanism includes a motor installed on the inner plate at the bottom, the output end of the motor passes through the inner plate and extends to one side of the operating room where a main winding wheel is installed, the other inner plate is installed with a magnetic powder brake on the same side of the motor, the output end of the magnetic powder brake is installed with an auxiliary winding wheel on the same side of the main winding wheel, and multiple guide wheels are installed between the main winding wheel and the auxiliary winding wheels on the two inner plates.

[0008] As a further solution of the present invention: a tension sensor is installed on one side of the top inner plate close to the electrical room, electrode sheets are installed between the main reel, the auxiliary reel and each guide wheel, and the motor, the magnetic powder brake and the tension sensor are all electrically connected to the control component.

[0009] As a further solution of the present invention: the correction component includes a correction sensor installed between the two inner plates, the electrode sheet passes through the middle of the correction sensor, and a positioning cylinder is installed on the side close to the guide wheel of the magnetic powder brake.

[0010] As a further solution of the present invention: the inspection component includes an adjustment groove arranged on one side of the top inner plate, and an adjustment member is installed on the side of the adjustment groove close to the operating room, and the adjustment member is provided with straight slots in the horizontal and vertical directions, and a frame is installed at one of the straight slots, and a micro motor is installed on one side of the top of the frame, and an inspection camera is rotatably connected between the output end of the micro motor and the frame, and the micro motor is electrically connected to the control component.

[0011] A detection method for a battery pole piece coating visual detection device comprises the following steps: S1. Install the electrode sheet between the main reel and the auxiliary reel, and pass through each guide wheel in turn; S2, place the electrode sheet against the tension sensor and pass it through the middle of the deviation correction sensor; S3. Adjust the position of the inspection camera on the rack, close the two observation doors, and start the power supply box to supply power; S4. According to the display data on the display screen of the control component, the tension of the electrode sheet is adjusted, the edge position of the electrode sheet is stably controlled, and the inspection result of the inspection camera during the winding process is read; S5. Turn off the power supply box, open the two observation doors, reinstall the electrode sheet, change the position of the inspection camera on the rack, inspect the electrode sheet for a second time and change the inspection angle of the inspection camera, and read the inspection result on the control component again.

[0012] Beneficial effects of the present invention: 1. In the present invention, an electrical room is installed on one side of the main frame, an operating room is installed on the other side, a control assembly is arranged at the bottom of the operating room, a main reel, an auxiliary reel and guide wheels are arranged on the inner plate in the middle of the main frame, and an inspection assembly is installed on one side of the electrode sheet installed on the main reel. The main structure of the electrode sheet detection is centrally arranged in the entire frame of the main frame, and the daily operation side and the control side are facing the staff, and the unused side is concentrated inside the equipment and blocked from the operation side and the control side, so that the equipment has the function of being suitable for the detection of small and micro unit electrode sheets; 2. In the present invention, by installing a magnetic powder brake on one side of the auxiliary reel and installing a tension sensor to abut against the electrode sheet, the device can stably regulate the tension of the electrode sheet during the retraction and release process. By installing a position adjustment cylinder on one side of the guide wheel and installing a deviation correction sensor on one side of the electrode sheet, the device can dynamically adjust the edge position of the electrode sheet to make the winding of the electrode sheet more regular. The purpose is to enable the device to have the ability to stably rewind the electrode sheet. Furthermore, since the electrode sheet is in a stable state with uniform tension and no lateral position deviation during winding, an inspection component is installed on the top side of the inner plate, and the inspection camera installed on the inspection component can perform multi-dimensional adjustments in angle and position. Therefore, during the inspection process, multiple interferences such as winding vibration, winding position deviation, inspection angle deviation and single position inspection can be eliminated, thereby effectively improving the accuracy of electrode sheet inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the back structure of the present invention in an open state; Figure 3 It is a schematic diagram of the internal structure of the front side of the present invention; Figure 4 The present invention Figure 3 A magnified detail of the center point A; Figure 5 It is a schematic diagram of the structure of the back of the present invention; Figure 6 It is a partial enlarged view of the inspection component of the present invention.

[0015] In the figure: 1. main frame; 2. electrical room; 3. power supply box; 4. operating room; 5. inner plate; 6. reel control mechanism; 61. motor; 62. main reel; 63. magnetic powder brake; 64. auxiliary reel; 65. guide wheel; 66. tension sensor; 67. electrode sheet; 7. deviation correction component; 71. deviation correction sensor; 72. adjustment cylinder; 8. inspection component; 81. adjustment slot; 82. adjustment piece; 83. straight slot; 84. frame; 85. micro motor; 86. inspection camera; 9. control component; 10. observation door; 11. inspection door; 12. handle. DETAILED DESCRIPTION

[0016] 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.

[0017] like Figures 1 to 6 As shown, a battery pole piece coating visual inspection equipment comprises a main frame 1, an electrical room 2 is arranged on one side of the main frame 1, a power supply box 3 is installed on one side of the electrical room 2, an operation room 4 is arranged on the side of the main frame 1 away from the electrical room 2, two inner plates 5 are fixedly connected to the operation room 4 in the middle of the main frame 1, a control and rolling mechanism 6 is installed between the two inner plates 5, a correction component 7 is installed on one side of the top inner plate 5 to adapt to the control and rolling mechanism 6, and is used to correct the position of the battery pole piece, an inspection component 8 is installed on one side of the top of the top inner plate 5, and is used to perform multi-angle inspection on the battery pole piece, a control component 9 is arranged at the bottom of the operation room 4, and is used to electrically control the control and rolling mechanism 6, the correction component 7 and the inspection component 8, and observation doors 10 are installed on both sides of the operation room 4; It should be noted that the main frame 1 is constructed of channel steel to improve the overall structural strength of the equipment. One side of the electrical room 2 is made of steel sheet metal between the channel steel frames, and an inspection door 11 is set on the outside of the electrical room 2 for the installation of part of the electrical structure and subsequent maintenance and repair. The power supply box 3 is installed on one side of the electrical room 2, and the box door can be opened from the outside of the equipment to facilitate the overall electrical control of the equipment; the control component 9 in the operating room 4 is set on an inclined plane on the outside of the equipment, and a bottom plate is set on the ground part of the operating room 4 inside the observation door 10 to block the contact between the electrical components inside the control component 9 and the staff. At the same time, the electrical components of the control component 9 installed inside the bottom plate are also convenient for connection with the power supply box 3 on the back side; Furthermore, since the equipment is structurally divided into an electrical room 2 and an operating room 4 on the left and right sides, an inspection door 11 is provided on the side where the electrical room 2 is located, so that the equipment has the function of regulating the overall power supply of the device and installing and repairing the main driving equipment. The operating room 4 is used for the specific installation of the battery poles to be tested, and an inspection component 8 and a correction component 7 are installed for comprehensive assistance in the detection process. At the same time, a control component 9 is arranged at the bottom in the vertical direction. The control component 9 includes multiple control knobs and a display screen to complete the actual control and status display during the maintenance process, that is, the equipment as a whole has all the functions of winding and unwinding and maintenance, and is highly integrated. At the same time, the electrical room 2 integrates permanent electrical equipment that is not suitable for manual contact, and the operating room 4 integrates structural parts that require frequent manual assistance to maintain safety during use. The integrated, stable and safe equipment structure is suitable for small and micro units to carry out maintenance of battery poles.

[0018] The observation door 10 is provided with visual panels on both sides and the top thereof which are perpendicular to each other, and one side is rotatably connected to the main frame 1, and a handle 12 is provided on one side of the observation door 10; It should be noted that the visual panel of the observation door 10 is preferably made of brown PVC material, which is used to prevent external stray light from affecting visual detection, while also allowing for partial light transmittance to facilitate staff observation of internal mechanisms and equipment. The handle 12 facilitates staff to open and close the operating room 4.

[0019] like Figures 3 to 5As shown, the reel control mechanism 6 includes a motor 61 installed on the bottom inner plate 5, the motor 61 is close to the electrical room 2, the output end of the motor 61 penetrates the bottom inner plate 5 and extends to the side of the operating room 4, and a main reel 62 is installed, the top inner plate 5 is installed on the same side of the motor 61, and the output end of the magnetic powder brake 63 is installed on the same side of the main reel 62. Five guide wheels 65 are installed between the main reel 62 and the auxiliary reel 64 on the two inner plates 5, and a tension sensor 66 is installed on the side of the inner plate 5 close to the electrical room 2. Electrode sheets 67 are installed between the main reel 62 and the auxiliary reel 64 and each guide wheel 65. The motor 61, the magnetic powder brake 63 and the tension sensor 66 are all electrically connected to the control component 9; It should be noted that the motor 61 is preferably a servo motor, the tension sensor 66 is installed on one side of the electrical room 2, and its sensing part passes through the two inner plates 5 and contacts the electrode sheet 67 to sense the tension level of the electrode sheet 67 in real time, and the tension level of the tension sensor 66 is displayed on the display screen on one side of the control component 9. Specifically, the magnetic powder brake 63 has the characteristics of accurately controlling the braking effect and torque size, fast response speed, high control accuracy, no wear, strong adaptability, etc. During the process of winding and unwinding, the equipment uses the magnetic powder brake 63 as a damping source. The tension sensor 66 is combined to detect the tension of the electrode sheet 67 during winding and unwinding, and the detection result is fed back to the brake control of the magnetic powder brake 63. The tension stability control function of the electrode sheet 67 during winding and unwinding is realized through fine regulation of the braking force, thereby maintaining the stability of the electrode sheet 67 during winding and unwinding, which aims to improve the regularity of the final electrode sheet roll after winding and unwinding. Furthermore, the interference of the inspection component 8 on the detection result due to tension changes during the detection process is eliminated, thereby improving the accuracy of the inspection result; in addition, the aforementioned battery electrode is the electrode sheet 67.

[0020] The deviation correction component 7 includes a deviation correction sensor 71 installed on one side of the two inner plates 5, an electrode sheet 67 passes through the middle of the deviation correction sensor 71, and a positioning cylinder 72 is installed on one side of the guide wheel 65 close to the magnetic powder brake 63; It should be noted that the deflection correction sensor 71 is U-shaped as a whole, and its sensor is arranged inside the U-shaped part. When the electrode sheet 67 passes through the position of the U-shaped detection part, the side position of the electrode sheet 67 can be detected. Specifically, its detection accuracy is ±0.02mm, and the detection range is 5mm. The deflection correction sensor 71 is also electrically connected to the display screen of the control component 9, and the positioning cylinder 72 is electrically connected to the control knob of the control component 9. In the winding process, the deflection correction sensor 71 detects the side position, and the detection result is fed back to the positioning cylinder 72. The positioning cylinder 72 then adjusts the lateral position of the guide wheel 65 close to the magnetic powder brake 63, so as to realize real-time adjustment of the winding position of the electrode sheet 67, so as to achieve the function of further regularizing the winding accuracy. Furthermore, through the cooperation of the winding control mechanism 6 and the deviation correction component 7, the electrode sheet 67 can maintain the accuracy of the winding position and the stability of its own shape during the winding and unwinding process, which is convenient for eliminating the interference of position changes and tension changes for subsequent inspection, and effectively improves the accuracy of the inspection results.

[0021] like Figure 3 and Figure 6 As shown, the inspection assembly 8 includes an adjustment slot 81 arranged on the top inner plate 5, a T-shaped adjustment member 82 is installed on the side of the adjustment slot 81 close to the operating room 4, and the adjustment member 82 is provided with straight slots 83 in the horizontal and vertical directions, a frame 84 is installed at one of the straight slots 83, a micro motor 85 is installed on one side of the top of the frame 84, an inspection camera 86 is rotatably connected between the output end of the micro motor 85 and the frame 84, and the micro motor 85 is electrically connected to the control assembly 9; It should be noted that, preferably, the adjustment groove 81 is installed on the top side of the upper inner plate 5, so that the lens of the inspection camera 86 can completely capture the lateral format of the entire electrode sheet 67. Since the adjustment member 82 is provided with straight slots 83 in the lateral and longitudinal directions, the inspection camera 86 can be installed on the adjustment member 82 for multi-position adjustment. At the same time, after installation and fixation, the control component 9 can control the rotation of the output end of the micro motor 85, so as to adjust the shooting angle of the lens. With the help of multi-faceted control of the shooting position and shooting angle, combined with the stable state of the electrode sheet 67 during winding, the interference of factors such as winding vibration, winding position offset, inspection angle deviation and single position inspection on the inspection result is effectively eliminated, thereby effectively improving the comprehensiveness and accuracy of the detection result.

[0022] A detection method for a battery pole piece coating visual detection device, the steps of which are as follows: S1, install the electrode sheet 67 between the main reel 62 and the auxiliary reel 64, and pass through each guide wheel 65 in sequence; this step is used to install the electrode sheet 67 to be tested; S2, the electrode sheet 67 abuts against the tension sensor 66 and passes through the middle of the deviation correction sensor 71; this step is used for the subsequent deviation correction component 7 to adjust the lateral position of the electrode sheet 67, and the winding control mechanism 6 to control the tension of the electrode sheet 67; S3, adjust the position of the inspection camera 86 on the rack 84, close the two observation doors 10, and start the power supply of the power supply box 3; this step is used to enter the detection stage; S4, according to the display data on the display screen of the control component 9, the tension of the electrode sheet 67 is adjusted, and the edge position of the electrode sheet 67 is stably controlled, and the inspection result of the inspection camera 86 during the winding process is read; this step is used for preliminary inspection of the electrode sheet 67 to be inspected, and the specific inspection contents include but are not limited to pinholes, scratches and particles, etc.; S5. Close the power supply box 3, open the two observation doors 10, reinstall the electrode sheet 67, change the position of the inspection camera 86 on the frame 84, inspect the electrode sheet 67 for a second time and change the inspection angle of the inspection camera 86, and read the inspection result on the control component 9 again; this step is used for rechecking the inspection.

[0023] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A battery pole piece coating visual inspection device, comprising a main frame (1), an electrical room (2) being arranged on one side of the main frame (1), a power supply box (3) being installed on one side of the electrical room (2), characterized in that: An operating room (4) is arranged on a side of the main frame (1) away from the electrical room (2); two inner plates (5) are fixedly connected to the middle of the main frame (1); a control roll mechanism (6) is installed between the two inner plates (5); a deviation correction component (7) is installed on one side of one of the inner plates (5); the deviation correction component (7) is used to correct the position of the battery pole piece; and an inspection component (8) is installed on one side of the top of the inner plate (5); the inspection component (8) is used to perform multi-angle inspection on the battery pole piece; a control component (9) is arranged at the bottom of the operating room (4); the control component (9) is used to electrically control the control roll mechanism (6), the deviation correction component (7) and the inspection component (8); and observation doors (10) are installed on both sides of the operating room (4).

2. A battery pole piece coating visual inspection device according to claim 1, characterized in that: An inspection door (11) is provided on a side of the electrical room (2) away from the observation door (10); visual panels are installed on both sides and the top of the observation door (10) that are perpendicular to each other and are rotatably connected to the main frame (1); and a handle (12) is installed on one side of the observation door (10).

3. A battery pole piece coating visual inspection device according to claim 1, characterized in that: The reel control mechanism (6) comprises a motor (61) mounted on the inner plate (5) at the bottom, the output end of the motor (61) passes through the inner plate (5) and extends to one side of the operating room (4) and is equipped with a main reel (62), the other inner plate (5) is equipped with a magnetic powder brake (63) on the same side of the motor (61), the output end of the magnetic powder brake (63) is equipped with an auxiliary reel (64) on the same side of the main reel (62), and a plurality of guide wheels (65) are installed between the main reel (62) and the auxiliary reel (64) on the two inner plates (5).

4. A battery pole piece coating visual inspection device according to claim 3, characterized in that: A tension sensor (66) is installed on one side of the top inner plate (5) close to the electrical chamber (2), and electrode sheets (67) are installed between the main reel (62), the auxiliary reel (64) and each of the guide wheels (65). The motor (61), the magnetic powder brake (63) and the tension sensor (66) are all electrically connected to the control component (9).

5. A battery pole piece coating visual inspection device according to claim 4, characterized in that: The deflection correction component (7) includes a deflection correction sensor (71) installed between the two inner plates (5), the electrode sheet (67) passes through the middle of the deflection correction sensor (71), and a positioning cylinder (72) is installed on one side of the guide wheel (65) close to the magnetic powder brake (63).

6. A battery pole piece coating visual inspection device according to claim 5, characterized in that: The inspection component (8) comprises a positioning groove (81) arranged on one side of the top inner plate (5); a positioning member (82) is installed on the side of the positioning groove (81) close to the operating room (4); the positioning member (82) is provided with straight slots (83) in the horizontal direction and in the vertical direction; a frame (84) is installed at one of the straight slots (83); a micro motor (85) is installed on one side of the top of the frame (84); an inspection camera (86) is rotatably connected between the output end of the micro motor (85) and the frame (84); and the micro motor (85) is electrically connected to the control component (9).

7. The detection method of a battery pole piece coating visual detection device according to claim 6, characterized in that: The following steps are involved: S1, installing the electrode sheet (67) between the main reel (62) and the auxiliary reel (64), and passing through each guide wheel (65) in sequence; S2, placing the electrode sheet (67) against the tension sensor (66) and passing through the middle of the deviation correction sensor (71); S3, adjusting the position of the inspection camera (86) on the frame (84), closing the two observation doors (10), and starting the power supply box (3) to supply power; S4, adjusting the tension of the electrode sheet (67) according to the display data on the display screen of the control component (9), stably controlling the edge position of the electrode sheet (67), and reading the inspection result of the inspection camera (86) during the winding process; S5, close the power supply box (3), open the two observation doors (10), reinstall the electrode sheet (67), change the position of the inspection camera (86) on the frame (84), inspect the electrode sheet (67) for a second time and change the inspection angle of the inspection camera (86), and read the inspection result on the control component (9) again.

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