Square energy storage battery pack blue film appearance defect detection device

Abstract

This invention relates to a device for detecting appearance defects. To address the problems of high labor intensity, low efficiency, poor compatibility, large footprint, and low safety in existing battery testing methods, this invention provides a device for detecting appearance defects in the blue film of a square energy storage battery pack. The device includes, in sequence, a dust removal module, a bottom horizontal movement component, a bottom defect detection component, a first alternating up-and-down module, a side defect detection module, a horizontal movement and rotation component, a second alternating up-and-down module, a large-area defect detection module, a top defect detection component, and a material unloading module. Both the first and second alternating up-and-down modules include a secondary positioning component. The side defect detection module and the large-area defect detection module each include a fixed side and an adjustable side arranged opposite each other. The adjustable side, through an adjusting component located at the bottom, adjusts the working distance between the detection component mounted on the adjustable side and the product defect detection surface. This invention features high automation, high efficiency, high safety, strong compatibility, and a small footprint.

Description

Technical Field

[0001] This invention relates to a device for detecting appearance defects, and more particularly to a device for detecting appearance defects of the blue film in a square energy storage battery pack. Background Technology

[0002] Square energy storage batteries are increasingly being produced as a crucial component of current energy storage devices. To ensure high-quality products are installed in these devices, each square battery requires surface cleaning to remove dirt. Finally, a six-sided visual inspection of the square battery is an important method for battery testing. Due to the significant weight of energy storage batteries, manual inspection requires lifting a 6kg battery, wiping it with a cloth, and then flipping it over for inspection. During this process, the battery electrodes are exposed, posing a safety hazard due to contact with metal components. Therefore, manual battery inspection is extremely labor-intensive. Using equipment to inspect all six sides of the battery greatly reduces the risk of accidents caused by manual labor and significantly increases product testing capacity.

[0003] However, current mechanical inspection also has the following problems: 1. Low equipment continuity, requiring manual intervention during operation; 2. Poor compatibility of continuous lines, requiring equipment debugging every time a new product is changed, resulting in extremely low inspection efficiency for large-volume, small-scale product inspections, even higher than manual inspection; 3. Large inspection errors, firstly relying on manual dust removal with generally poor results, and secondly lacking secondary positioning during inspection, leading to discrepancies between the captured images and the actual situation; 4. Excessively long production lines, resulting in a huge footprint.

[0004] In summary, existing battery testing methods suffer from problems such as high labor intensity, low efficiency, poor compatibility, large footprint, and low safety. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a device for detecting defects in the blue film of a square energy storage battery pack, in order to address the problems of high labor intensity, low efficiency, poor compatibility, large footprint and low safety in existing battery testing.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a square energy storage battery pack blue film appearance defect detection device, comprising a dust removal module, a bottom surface transverse moving component, a bottom surface defect detection component, a first vertical alternating module, a side surface defect detection module, a transverse moving and rotating component, a second vertical alternating module, a large surface defect detection module, a top surface defect detection component, and a material unloading module arranged in sequence.

[0007] Both the first and second alternating up-down modules include two parallel moving components that move alternately, and each moving component is provided with a secondary positioning component for secondary positioning of the product.

[0008] Both the side defect detection module and the large surface defect detection module include a fixed side and an adjustable side arranged opposite to each other. The adjustable side adjusts the working distance between the detection component installed on the adjustable side and the product defect detection surface through an adjustment component set at the bottom.

[0009] Furthermore, the side defect detection module includes a right side detection component and a left side detection component, and the large surface defect detection module includes a front side detection component and a rear side detection component; the right side detection component and the front side detection component are sequentially arranged on the fixed side, and the left side detection component and the rear side detection component are sequentially arranged on the adjustable side. The right side detection component and the left side detection component are arranged opposite to each other and are distributed in a cross shape with the product's forward direction.

[0010] The front-side inspection component and the rear-side inspection component are parallel to each other and are set at an angle to the product's direction of travel. When the product passes the front-side inspection component and the rear-side inspection component, the front-side inspection component inspects the front-side defects of the product from right to left, and the rear-side inspection component inspects the rear-side defects of the product from left to right.

[0011] Furthermore, the front face detection component and the rear face detection component are parallel to each other and are inclined to the forward direction of the product. When the product passes the front face detection component and the rear face detection component, the front face detection component detects the left side defect and the front face defect of the product from right to left, and the rear face detection component detects the right side defect and the rear face defect of the product from left to right.

[0012] Furthermore, the dust removal module includes a bottom cleaning component, a side cleaning component, a top cleaning component, a side and front and rear cleaning component, a top secondary cleaning component, and a bottom blowing component arranged in sequence.

[0013] The bottom cleaning component and the bottom blowing component are respectively installed at the rear end and the front end of the conveyor belt, and the air outlet of the bottom blowing component is aligned with the contact position between the conveyor belt and the product on the conveyor belt.

[0014] Furthermore, the side and front / rear cleaning components include a first air knife component and a second air knife component. The first air knife component and the second air knife component are respectively installed on the left and right sides of the conveyor belt. The air outlets of the first air knife component and the second air knife component are parallel to each other and are inclined to the conveyor belt. When the product passes through the first air knife component and the second air knife component, the first air knife component blows the front, left and rear faces of the product, and the second air knife component blows the front, right and rear faces of the product.

[0015] Furthermore, the secondary positioning assembly includes a base plate, a first rotating clamping roller, a second rotating clamping roller, a first positioning cylinder, and a second positioning cylinder;

[0016] The substrate has a through hole, and a first rotating clamping roller and a second rotating clamping roller are installed on the upper and lower sides of the substrate below the through hole.

[0017] The first positioning cylinder and the second positioning cylinder are installed opposite each other on the left and right sides of the base plate, and the first positioning cylinder and the second positioning cylinder are arranged in a cross shape with the first rotating clamping roller and the second rotating clamping roller.

[0018] Furthermore, when the first and second rotary clamping rollers flip upward from the underside of the substrate, they clamp the energy storage battery pack located on the upper side of the substrate through the through holes. When the first and second rotary clamping rollers flip downward, they are submerged in the underside of the substrate or flush with the upper side of the substrate.

[0019] Furthermore, the clamping force of the first rotating clamping roller is greater than the clamping force of the second rotating clamping roller.

[0020] Furthermore, the thrust of the first positioning cylinder is greater than the thrust of the second positioning cylinder.

[0021] Furthermore, the unloading module includes an unloading robot and an NG channel and at least one OK channel located below the unloading robot.

[0022] The beneficial effects of this invention are as follows: The blue film appearance defect detection device for a square energy storage battery pack addresses the issue that dust on the surface of the square energy storage battery primarily originates from airborne dust and dust within the workshop. A dust removal device (USC) simultaneously blows and sucks the dust into the atmosphere; this process is fine dust removal. Then, an air knife blows ion air to lift dust from the sides of the product. A large panel is equipped with a dust suction device to remove all surface dust and discharge it into the atmosphere. This effectively cleans the dust from the six-sided surface of the product. A barcode scanner transmits QR code data to the MES system for real-time tracking. A lateral movement picking and placing robot picks up the product for bottom surface defect detection. Simultaneously, the device incorporates a first alternating up-and-down module for detecting side defects through line scanning and area scanning. Lateral movement and rotation further enhance the detection capabilities. The equipment places the product into the second alternating up-and-down module, where large-area defects are detected using line scanning and area array scanning. Based on the detection results, a four-axis robot sequentially places the inspected products into OK and NG conveyor belts. The entire process requires no manual intervention, achieving automatic inspection of the six sides of the blue film battery. Due to the large weight of the energy storage battery, manual inspection would require lifting a 6KG battery, wiping it with a cloth, and then flipping it over for inspection. During this process, the battery electrodes are exposed, posing a safety hazard if they come into contact with metal parts. This demonstrates the high workload of manual battery inspection. Using equipment to inspect the six sides of the battery greatly avoids safety accidents caused by manual labor, significantly increases product inspection capacity, and solves the problems of high labor intensity, low efficiency, and low safety.

[0023] When detecting side defects and large surface defects, the detection equipment is installed on the fixed side and the adjustable side, respectively. The adjustable side can be adjusted manually or automatically according to the parameter settings to adaptively adjust the working distance between the detection equipment and the detection surface, thereby solving the problem of poor compatibility.

[0024] By adjusting and repositioning the product through the bottom horizontal movement component, the horizontal movement rotation component, the first vertical alternation module, and the second vertical alternation module, the length of the equipment is shortened and the floor space occupied by the equipment is reduced.

[0025] In summary, this invention features high automation, high efficiency, high security, strong compatibility, and small footprint. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a partial structural schematic diagram of the present invention.

[0029] Figure 3This is a schematic diagram of the top surface defect detection component and the transverse rotation component of the present invention.

[0030] Figure 4 This is a schematic diagram of the material feeding module of the present invention.

[0031] Figure 5 This is a schematic diagram of the structure of the large-area defect detection module of the present invention.

[0032] Figure 6 This is a schematic diagram of the dust removal module of the present invention.

[0033] Figure 7 This is a schematic diagram of the structure of the first or second alternating up and down module of the present invention.

[0034] Figure 8 This is a schematic diagram of the secondary positioning component in the first or second alternating up and down module of the present invention.

[0035] In the diagram: 1. Product, 2. Dust removal module, 3. Bottom lateral movement component, 4. Bottom defect detection component, 5. First alternating up and down module, 6. Side defect detection module, 7. Lateral rotation component, 8. Second alternating up and down module, 9. Large surface defect detection module, 10. Top surface defect detection component, 11. Unloading module, 12. Fixed side, 13. Adjustable side, 14. QR code detection, 15. Three-axis robot;

[0036] 21. Bottom surface cleaning assembly; 22. Conveyor belt; 23. Side cleaning assembly; 24. Top surface cleaning assembly; 25. First air knife assembly; 26. Second air knife assembly; 27. Top surface secondary cleaning assembly; 28. Bottom surface blowing assembly;

[0037] 51. Z-axis moving component; 52. X-axis moving component; 53. Substrate; 54. First rotary clamping roller; 55. Second rotary clamping roller; 56. First positioning cylinder; 57. Second positioning cylinder; 58. Through hole;

[0038] 61. Right side detection component, 62. Left side detection component, 91. Front side detection component, 92. Rear side detection component. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0040] like Figures 1 to 8The device shown is a blue film appearance defect detection device for a square energy storage battery pack, which includes a dust removal module 2, a bottom horizontal movement component 3, a bottom defect detection component 4, a first vertical alternation module 5, a side defect detection module 6, a horizontal movement and rotation component 7, a second vertical alternation module 8, a large surface defect detection module 9, a top surface defect detection component 10, and a material unloading module 11 arranged in sequence.

[0041] Step 1: The three-axis robot arm 15 picks up one product 1 (battery) at a time from the docking pull belt and cleans the dust on the bottom surface.

[0042] Step 2: After cleaning the bottom surface of Product 1, place it on the pull strap and clean the dust on the remaining five sides.

[0043] Step 3: After cleaning all six sides of the product, perform product QR code detection 14, and transmit the detection data to the MES system for real-time data management and tracking.

[0044] Step 4: The bottom surface transverse component 3 clamps up the product 1, and the bottom surface defect detection component 4, which is set below the bottom surface transverse component 3, performs bottom surface defect detection on the product 1 and saves the detection results to the PLC.

[0045] Step 5: The bottom transverse component 3 places the product 1, after the bottom surface inspection is completed, into the first vertical alternation module 5. The first vertical alternation module 5 positions the product 1 and moves the product 1 through the side defect detection module 6 to perform side defect detection on the side of the product 1.

[0046] Step 6: After the side defect detection, product 1 is transferred to the second up-down alternating module 8 by the transverse rotation component 7. The second up-down alternating module 8 positions product 1 and drives product 1 to pass through the large surface defect detection module 9 and the top surface defect detection component 10 in sequence to detect defects on the large surface and top surface of product 1.

[0047] Step 7: The four-axis robot in the unloading module 11 places the inspected product 1 into the OK or NG conveyor belts in sequence according to the inspection results. The ends of the OK and NG conveyor belts are connected to the subsequent packaging machine or receiving machine.

[0048] in

[0049] Three-axis robotic arm 15: This is a commercially available product and its grasping action is a standard action, so the description is omitted.

[0050] Dust Removal Module 2: The three-axis robot 15 transfers product 1 to the top of the bottom cleaning component 21. The bottom cleaning component 21 is installed at the rear end of the conveyor belt 22 (pulling belt). The air blades of the bottom blowing component are vertically upward, and the top end face of the bottom air blades is flush with the conveyor belt 22. When product 1 passes through the bottom cleaning component 21, the bottom cleaning component 21 removes dust and blows it away from the bottom of product 1. Then product 1 is placed on the conveyor belt 22, and the conveyor belt 22 carries product 1 forward in sequence through the side cleaning component 23, the top cleaning component 24, the side and front and rear cleaning components 6, the top secondary cleaning component 27, and the bottom cleaning component 24. The blowing assembly 28; a pair of blowing assemblies of the side cleaning assembly 23 are installed opposite each other on both sides of the conveyor belt 22, blowing the left and right sides of product 1 from front to back as product 1 passes by; the top cleaning assembly 24 is vertically installed above the conveyor belt 22 by a mounting bracket, with the top air knife blade facing the conveyor belt 22, blowing the top surface of product 1 from front to back as product 1 passes by; the side and front and rear cleaning assembly 6 includes a first air knife assembly 25 and a second air knife assembly 26, which are respectively installed on the left and right sides of the conveyor belt 22, and the air outlets of the first air knife assembly 25 and the second air knife assembly 26 are... The components are installed parallel to each other and at an angle to the conveyor belt 22. When product 1 passes through the first air knife assembly 25 and the second air knife assembly 26, the first air knife assembly 25 blows on the front, left, and rear faces of product 1, while the second air knife assembly 26 blows on the front, right, and rear faces of product 1. The top surface secondary cleaning assembly 27 is vertically installed above the conveyor belt 22, with the top surface secondary air knife nozzles tilted at a certain angle towards the rear of the bottom surface cleaning assembly 21, blowing on the top surface of product 1 from front to back as product 1 passes by. The bottom surface blowing assembly 28 is a commercially available universal air hose, which is installed on the conveyor belt. At the very front of the conveyor belt 22, the air outlet of the bottom cleaning component 28 is aligned with the contact surface of the conveyor belt 22 and the product 1 on the conveyor belt 22. The bottom cleaning component 21, the side cleaning component 23, the top cleaning component 24, the side and front and rear cleaning components 6, the top secondary cleaning component 27, and the bottom cleaning component 28 have been patented for their air duct and air blade structure, and are existing structures, so the description of their internal structure is omitted. Furthermore, a fan adsorption device is installed above these components. The fan adsorption device is also an existing device. The dust blown down by the above components is adsorbed by the fan adsorption device, filtered, and discharged into the atmosphere.

[0051] Bottom lateral movement component 3 and lateral rotation component 7: These are existing conventional transfer structures.

[0052] Bottom surface defect detection component 4 and top surface defect detection component 10 are the same as the visual defect detection device previously applied for by the applicant, mainly composed of a light source and a camera. In this application, the camera is a line scan camera.

[0053] The first alternating up-and-down module 5 and the second alternating up-and-down module 8 have the same structure, both including two parallel moving modules. These two modules move alternately up, down, left, and right. Both modules have identical structures, including a Z-axis moving component 51 and an X-axis moving component 52. The Z-axis moving component 51 is vertically mounted on the X-axis moving component 52 and is driven to move forward and backward by the X-axis moving component 52. A secondary positioning component is mounted on the Z-axis moving component 51 and drives the secondary positioning component to move up and down. Product 1 moves up and down via the Z-axis moving component 51, and the X-axis moving component 52 drives the entire Z-axis moving component 51 to move, achieving alternating up-and-down movement of the two products 1 without interference or influence. The secondary positioning component includes a base plate 53. The system comprises a first rotary clamping roller 54, a second rotary clamping roller 55, a first positioning cylinder 56, and a second positioning cylinder 57. Firstly, a through hole 58 is formed on the substrate. The first rotary clamping roller 54 and the second rotary clamping roller 55 are installed on the upper and lower sides of the substrate below the through hole 58. Both the first rotary clamping roller 54 and the second rotary clamping roller 55 are commercially available rotary clamping roller products, differing only in their model number. The clamping force of the first rotary clamping roller 54 is greater than that of the second rotary clamping roller 55. Secondly, a precision pressure regulating valve controls the clamping force of the first rotary clamping roller 54 and the second rotary clamping roller 55 to prevent damage to the product. The first rotary clamping roller 54 serves as a reference point for the visual imaging point and is replaceable. During product manufacturing, this edge is used as a reference. Simultaneously, planar friction is transformed into rolling friction, reducing wear on product 1. The second rotating clamping roller clamps product 1, further reducing wear by converting planar friction into rolling friction. The first rotating clamping roller 54 and the second rotating clamping roller 55 rotate 90° upwards from the underside of the substrate 53, clamping product 1 located on the upper side of the substrate 53 through the through-hole 58. When the first rotating clamping roller 54 and the second rotating clamping roller 55 rotate downwards, they are either submerged in the underside of the substrate 53 or flush with the upper side of the substrate 53, preventing them from being captured in the image during the subsequent visual imaging stage. As shown in the test results; the first positioning cylinder 56 and the second positioning cylinder 57 are installed opposite each other on the left and right sides of the upper side of the base plate 53. The first positioning cylinder 56 and the second positioning cylinder 57 are arranged in a cross shape with the first rotating clamping roller 54 and the second rotating clamping roller 55 on the upper and lower sides. The first positioning cylinder 56 and the second positioning cylinder 57 are both commercially available products. The difference is that the thrust of the first positioning cylinder 56 is greater than that of the second positioning cylinder 57. The first positioning cylinder 56 can be used as the positioning edge of product 1. The second positioning cylinder 57 can be used as the main driving force of product 1. The second positioning cylinder 57 has a small thrust. After pushing product 1 against the first positioning cylinder 56, it cannot push the first positioning cylinder 56. Therefore, the first positioning cylinder 56 is used as the positioning edge of product 1.

[0054] Side defect detection module 6: includes a right side detection component and a left side detection component. The right side detection component is installed at the front end of the fixed side 12, and the left side detection component is installed at the front end of the adjustable side 13. The right side detection component and the left side detection component are arranged opposite to each other and are distributed in a cross shape with the forward direction of product 1. The right side detection component and the left side detection component are both visual defect detection devices previously applied for by the applicant, mainly composed of a light source and a camera. In this application, a line scan camera is used.

[0055] Large-area defect detection module 9 includes a front-side detection component and a rear-side detection component. The front-side detection component is installed at the rear end of the fixed side 12, and the rear-side detection component is installed at the rear end of the adjustable side 13. The front-side and rear-side detection components are parallel to each other and are inclined to the forward direction of product 1. When product 1 passes the front-side and rear-side detection components, the front-side detection component detects the front-side defects of product 1 from right to left, and the rear-side detection component detects the rear-side defects of product 1 from left to right. By adjusting the angle of the front-side and rear-side detection components, it is also possible to realize that when product 1 passes the front-side and rear-side detection components, the front-side detection component detects the left-side and front-side defects of the product sequentially from right to left, and the rear-side detection component detects the right-side and rear-side defects of the product sequentially from left to right. The front-side and rear-side detection components are both visual defect detection devices previously applied for by the applicant, mainly composed of a light source and a camera. In this application, a line scan camera is used.

[0056] Material unloading module 11: includes a four-axis robot as a material unloading manipulator, and an NG channel and two OK channels below the material unloading manipulator. NG products are placed in the NG channel and OK products are placed in the OK channel.

[0057] The above description is only a specific embodiment of the present invention. Various examples and illustrations do not constitute a limitation on the substantive content of the present invention. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the specification without departing from the substance and scope of the invention.

Claims

1. A device for detecting appearance defects of the blue film in a square energy storage battery pack, characterized in that: It includes a dust removal module, a bottom horizontal movement component, a bottom defect detection component, a first vertical alternation module, a side defect detection module, a horizontal movement and rotation component, a second vertical alternation module, a large surface defect detection module, a top surface defect detection component, and a material unloading module, arranged sequentially. Both the first and second alternating up-down modules include two parallel moving components that move alternately, and each moving component is provided with a secondary positioning component for secondary positioning of the product. Both the side defect detection module and the large surface defect detection module include a fixed side and an adjustable side arranged opposite to each other. The adjustable side adjusts the working distance from the detection component installed on the adjustable side to the product defect detection surface through an adjustment component set at the bottom. The secondary positioning assembly includes a base plate, a first rotary clamping roller, a second rotary clamping roller, a first positioning cylinder, and a second positioning cylinder; The substrate has a through hole, and a first rotating clamping roller and a second rotating clamping roller are installed on the upper and lower sides of the substrate below the through hole. The first positioning cylinder and the second positioning cylinder are installed opposite each other on the left and right sides of the base plate, and the first positioning cylinder and the second positioning cylinder are arranged in a cross shape with the first rotating clamping roller and the second rotating clamping roller. When the first and second rotary clamping rollers flip upward from the underside of the substrate, they clamp the energy storage battery pack located on the upper side of the substrate through the through hole. When the first and second rotary clamping rollers flip downward, they are submerged in the underside of the substrate or flush with the upper side of the substrate.

2. The device for detecting appearance defects of the blue film in a square energy storage battery pack as described in claim 1, characterized in that: The side defect detection module includes a right side detection component and a left side detection component, and the large surface defect detection module includes a front side detection component and a rear side detection component; the right side detection component and the front side detection component are arranged sequentially on the fixed side, and the left side detection component and the rear side detection component are arranged sequentially on the adjustable side. The right side detection component and the left side detection component are arranged opposite to each other and are distributed in a cross shape with the product's forward direction. The front-side inspection component and the rear-side inspection component are parallel to each other and are set at an angle to the product's direction of travel. When the product passes by the front-side inspection component and the rear-side inspection component, the front-side inspection component inspects the front-side defects of the product from right to left, and the rear-side inspection component inspects the rear-side defects of the product from left to right.

3. The device for detecting appearance defects of the blue film in a square energy storage battery pack as described in claim 2, characterized in that: The front face detection component and the rear face detection component are parallel to each other and are inclined to the direction of the product's movement. When the product passes the front face detection component and the rear face detection component, the front face detection component detects the left side defect and the front face defect of the product from right to left, and the rear face detection component detects the right side defect and the rear face defect of the product from left to right.

4. The device for detecting appearance defects of the blue film in a square energy storage battery pack as described in claim 1, characterized in that: The dust removal module includes, in sequence, a bottom cleaning component, a side cleaning component, a top cleaning component, a side and front and rear cleaning component, a top secondary cleaning component, and a bottom blowing component; The bottom cleaning component and the bottom blowing component are respectively installed at the rear end and the front end of the conveyor belt, and the air outlet of the bottom blowing component is aligned with the contact position between the conveyor belt and the product on the conveyor belt.

5. The device for detecting appearance defects of the blue film in a square energy storage battery pack as described in claim 4, characterized in that: The side and front / rear cleaning components include a first air knife component and a second air knife component. The first air knife component and the second air knife component are respectively installed on the left and right sides of the conveyor belt. The air outlets of the first air knife component and the second air knife component are parallel to each other and are inclined to the conveyor belt. When the product passes through the first air knife component and the second air knife component, the first air knife component blows the front, left and rear faces of the product, and the second air knife component blows the front, right and rear faces of the product.

6. The device for detecting appearance defects of the blue film in a square energy storage battery pack as described in claim 1, characterized in that: The clamping force of the first rotating clamping roller is greater than the clamping force of the second rotating clamping roller.

7. The device for detecting appearance defects of the blue film in a square energy storage battery pack as described in claim 1, characterized in that: The thrust of the first positioning cylinder is greater than the thrust of the second positioning cylinder.

8. The device for detecting appearance defects of the blue film in a square energy storage battery pack as described in claim 1, characterized in that: The unloading module includes an unloading robot and an NG channel and at least one OK channel located below the unloading robot.

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