A winding battery cell core extraction and detection device

Abstract

This utility model relates to a device for detecting the extraction of bare battery cells, belonging to the field of battery cell testing technology. It includes a frame, a testing bracket mounted on the frame, a testing camera mounted on the testing bracket, and a conveying component positioned below the testing camera. One end of the conveying component is an input end, and the other end is an output end. The conveying component is used to move bare battery cells from the input end to the output end. A correction component is positioned above the conveying component, between the input end and the testing camera, and is used to correct the deviation of the bare battery cells. This application has the effect of improving the accuracy of bare battery cell extraction detection.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, and in particular to a device for detecting the core extraction of wound battery cells. Background Technology

[0002] With the rapid development of lithium-ion battery technology, the quality requirements for bare battery cells have become increasingly stringent. Among these requirements, the process of extracting bare cells is one of the factors that affects the quality of bare battery cells.

[0003] In the current production process, after the bare cells are wound into shape by a winding machine, it is usually necessary to rely on visual inspection of the bare cells to identify and detect the cell removal situation in order to assess the quality of the bare cells. This makes it difficult to control the accuracy of battery cell removal inspection. Utility Model Content

[0004] In order to achieve the desired effect of bare cell extraction and improve the accuracy of battery cell extraction, this application provides a winding cell extraction and inspection device.

[0005] The winding cell core extraction and detection device provided in this application adopts the following technical solution:

[0006] A winding battery cell core extraction and inspection device includes a frame, an inspection bracket mounted on the frame, an inspection camera mounted on the inspection bracket, a conveying component positioned below the inspection camera, one end of the conveying component being an input end and the other end being an output end, the conveying component being used to move bare battery cells from the input end to the output end, and a correction component positioned above the conveying component, located between the input end and the inspection camera, the correction component being used to correct the deviation of the bare battery cells.

[0007] By adopting the above technical solution, after the bare battery cell undergoes the cold pressing process of the winding machine, it enters the conveying assembly from the input end. The conveying assembly moves the bare battery cell from the input end to the output end. During the movement of the bare battery cell, it first passes through the correction assembly, which corrects the deviation of the bare battery cell. After correction, the bare battery cell passes under the detection camera, which takes a picture of the bare battery cell to obtain an appearance image. After the bare battery cell has been corrected by the correction assembly, the left edge and the right edge of the bare battery cell in the appearance image are perpendicular to the top edge and the bottom edge of the image, respectively. Then, based on the obtained appearance image of the bare battery cell, the height of the middle position of the tab side edge, the height of the left position of the tab side edge, and the height of the right position of the tab side edge are obtained. The heights at the middle, left, and right positions of the non-tab edge are calculated. The height differences between the middle and left positions of the tab edge, the middle and right positions of the tab edge, the middle and left positions of the non-tab edge, and the middle and right positions of the non-tab edge are also calculated. If any of these height differences exceeds a set value, the bare cell is considered unqualified. If all the height differences do not exceed the set value, the bare cell is considered qualified. This achieves the effect of bare cell sampling inspection, reduces inspection errors caused by visual observation, and improves the accuracy of battery cell sampling inspection.

[0008] Preferably, the conveying assembly includes an input roller, an output roller, several support rollers, and a conveyor belt. The input roller, output roller, and support rollers are all rotatably connected to the frame. The input roller, output roller, and support rollers are arranged in parallel. The support rollers are located between the input roller and the output roller. The conveyor belt is sleeved on the input roller, output roller, and support rollers. The end of the conveyor belt near the input roller is the input end, and the end of the conveyor belt near the output roller is the output end.

[0009] By adopting the above technical solution, the support roller provides support for the conveyor belt. When the input roller and output roller rotate, the conveyor belt drives the bare battery cells to move.

[0010] Preferably, a conveyor motor is fixedly mounted on the frame, and the output shaft of the conveyor motor is fixedly connected to one end wall of the input roller.

[0011] By adopting the above technical solution, the transmission motor drives the input roller to rotate.

[0012] Preferably, the correction assembly includes a correction bracket and several guide rollers. The correction bracket is fixedly mounted on the frame. A stop block is provided at the top of each guide roller. The guide rollers are rotatably connected to the stop block. The stop block is slidably mounted on the correction bracket. The guide rollers are located between the input end and the detection camera. The side of the guide rollers away from the detection camera is used to contact the bare battery cell.

[0013] By adopting the above technical solution, when correcting the bare battery cell, the guide roller moves down to block the movement of the bare battery cell. Under the obstruction of the guide roller and the driving force of the conveying component, the side of the bare battery cell close to the guide roller gradually comes into contact with the guide roller. After the side of the bare battery cell close to the guide roller comes into contact with the guide roller, the guide roller moves up to make room for movement. The bare battery cell then moves towards the output end under the guidance of the conveying component.

[0014] Preferably, a piston cylinder is fixedly mounted on the correction bracket, and a lifting bracket is fixedly mounted on the output shaft of the piston cylinder, with the bottom of the lifting bracket being fixedly connected to the top of the stop block.

[0015] By adopting the above technical solution, the guide roller achieves the lifting and lowering effect using a piston cylinder.

[0016] Preferably, the correction assembly further includes several push rollers, with a push block commonly provided at the top of each push roller. The push rollers and push blocks are rotatably connected. The push blocks are slidably disposed at the bottom of the lifting bracket. The push rollers are located on the side of the stop roller away from the detection camera. The push rollers are arranged parallel to the stop rollers. The side of the push rollers facing the stop rollers is used to contact the bare battery cells.

[0017] By adopting the above technical solution, when correcting the bare battery cell, the guide roller moves down to block the movement of the bare battery cell, and the push roller pushes the bare battery cell to deflect. Under the obstruction of the guide roller and the push of the push roller, the bare battery cell gradually comes into contact with the guide roller on the side closest to the guide roller. When the bare battery cell comes into contact with the guide roller on the side closest to the guide roller, the push roller resets and the guide roller moves up to make room for movement. The bare battery cell then moves towards the output end under the use of the conveying assembly.

[0018] Preferably, a movable motor is fixedly installed at the bottom of the lifting bracket, a lead screw is fixedly installed on the output shaft of the movable motor, the lead screw is threadedly connected to the push block, a slide rod is threaded through the push block, the push block and the slide rod are slidably connected, the slide rod is fixedly connected to the bottom of the lifting bracket, and the slide rod is arranged parallel to the lead screw.

[0019] By adopting the above technical solution, the moving motor starts and drives the lead screw to rotate. The rotation of the lead screw drives the push block to move along the slide bar, thereby achieving the effect of pushing the roller to move.

[0020] Preferably, both the outer wall of the guide roller and the outer wall of the push roller are provided with a rubber layer.

[0021] By adopting the above technical solution, the rubber layer makes flexible contact with the battery cell, reducing the possibility of scratching the battery cell.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting up a frame, a testing bracket, a testing camera, a transmission component, an input terminal, an output terminal, and a correction component, the bare cell extraction testing effect can be achieved, reducing the testing error caused by visual observation and improving the accuracy of battery cell extraction testing;

[0024] 2. By setting up an input roller, an output roller, several support rollers, and a conveyor belt, the bare battery cell can be moved from the input end to the output end;

[0025] 3. By setting up a correction bracket, several guide rollers and several push rollers, the bare battery cells can be corrected. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a winding cell core extraction and detection device according to an embodiment of this application.

[0027] Figure 2 This is a schematic diagram illustrating the positional relationship between the input roller and the output roller in an embodiment of this application.

[0028] Figure 3 This is a schematic diagram illustrating the positional relationship between the push roller and the stop roller in the embodiments of this application.

[0029] Figure 4 This is a schematic diagram illustrating the connection between the push block and the lifting bracket in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram illustrating the positional relationship between the tab side edge and the non-tab side edge in the embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Detection camera; 21. Detection bracket; 3. Conveyor assembly; 31. Conveyor belt; 32. Input roller; 33. Output roller; 34. Support roller; 4. Conveyor motor; 41. Input end; 42. Output end; 5. Correction assembly; 51. Correction bracket; 52. Stop roller; 521. Stop block; 53. Push roller; 531. Push block; 6. Piston cylinder; 61. Lifting bracket; 7. Moving motor; 71. Lead screw; 72. Slide rod; 8. Rubber layer; 9. Image; 91. Edge of the tab side; 92. Edge of the non-tab side. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a winding cell core extraction and detection device. (Refer to...) Figures 1 to 5The system includes a frame 1, a detection bracket 21 mounted on the frame 1, and a detection camera 2 mounted on the detection bracket 21. A conveying assembly 3 is mounted directly below the camera of the detection camera 2. One end of the conveying assembly 3 is an input terminal 41, and the other end is an output terminal 42. The conveying assembly 3 is used to move bare battery cells from the input terminal 41 to the output terminal 42. A correction assembly 5 is mounted above the conveying assembly 3, located between the input terminal 41 and the detection camera 2. The correction assembly 5 is used to correct the deviation of the bare battery cells. After the bare battery cells undergo the cold pressing process of the winding machine, they enter the conveying assembly 3 from the input terminal 41. The conveying assembly 3 moves the bare battery cells from the input terminal 41 to the output terminal 42. During the movement of the bare battery cells, they first pass through the correction assembly 5, which corrects their deviation. The corrected bare battery cells then pass under the detection camera 2, which captures an image 9 of the bare battery cells' appearance. After the bare cell is corrected by the correction component 5, the left edge and the right edge of the bare cell in appearance image 9 are both perpendicular to the upper edge and the lower edge of image 9. Then, based on the obtained bare cell appearance image 9, the following heights are obtained: h2 (center position of tab side edge 91), h1 (left side position of tab side edge 91), h3 (right side position of tab side edge 91), h5 (center position of non-tab side edge 92), h4 (left side position of non-tab side edge 92), and h6 (right side position of non-tab side edge 92). The height differences |h2-h1| between the center and left sides of tab side edge 91, |h2-h3| between the center and right sides of tab side edge 91, |h5-h4| between the center and left sides of non-tab side edge 92, and |h5-h6| between the center and right sides of non-tab side edge 92 are calculated. If any of these height differences exceeds a set value, the bare cell is considered unqualified; if all of these height differences do not exceed the set value, the bare cell is considered qualified. This achieves the effect of cell extraction and inspection of bare battery cells, reduces inspection errors caused by visual observation, and improves the accuracy of battery cell extraction and inspection.

[0034] To achieve the effect of moving the bare battery cell from input terminal 41 to output terminal 42, refer to... Figure 1 and Figure 2The conveying assembly 3 includes an input roller 32, an output roller 33, several support rollers 34, and a conveyor belt 31. The input roller 32, output roller 33, and support rollers 34 are arranged in parallel and are all rotatably connected to the frame 1. The support rollers 34 are located between the input roller 32 and the output roller 33. The conveyor belt 31 is fitted onto the input roller 32, output roller 33, and support rollers 34, providing support for the conveyor belt 31. The end of the conveyor belt 31 closest to the input roller 32 is the input end 41, and the end of the conveyor belt 31 closest to the output roller 33 is the output end 42. A conveyor motor 4 is mounted on the frame 1, and the output shaft of the conveyor motor 4 is fixedly connected to one end wall of the input roller 32. When the conveyor motor 4 drives the input roller 32 to rotate, the conveyor belt 31 moves the bare battery cells.

[0035] To achieve the effect of correcting the polarity of bare cells, refer to Figure 1 and Figure 3 The correction assembly 5 includes a correction bracket 51, several guide rollers 52, and several push rollers 53. The correction bracket 51 is welded to the frame 1. A piston cylinder 6 is mounted on the correction bracket 51, and a lifting bracket 61 is mounted on the output shaft of the piston cylinder 6. The lifting bracket 61 moves up and down in the height direction. A stop block 521 is mounted on the top of each guide roller 52. The stop block 521 is rotatably connected to the guide roller 52 and welded to the bottom of the lifting bracket 61. A push block 531 is mounted on the top of each push roller 53. The push block 531 is rotatably connected to the push roller 53 and slidably disposed at the bottom of the lifting bracket 61. Both the guide rollers 52 and the push rollers 53 are located between the input end 41 and the detection camera 2, with the push roller 53 located on the side of the guide roller 52 away from the detection camera 2. The push rollers 53 are arranged parallel to the guide rollers 52, and the opposing surfaces of the push rollers 53 and guide rollers 52 are used to contact the bare battery cells. When correcting the bare battery cell, the lifting bracket 61 moves the stop roller 52 and the push roller 53 downwards. The stop roller 52 blocks the movement of the bare battery cell, while the push roller 53 pushes the bare battery cell to deflect it, causing the side of the bare battery cell closest to the stop roller 52 to gradually come into contact with the stop roller 52. Once the side of the bare battery cell closest to the stop roller 52 is in contact with the stop roller 52, the lifting bracket 61 moves the stop roller 52 and the push roller 53 upwards. The push roller 53 resets, and the stop roller 52 moves upwards to clear the movement path, allowing the bare battery cell to move towards the output end 42 under the guidance of the conveying assembly 3.

[0036] refer to Figure 3 and Figure 4 A movable motor 7 is installed at the bottom of the lifting bracket 61. A lead screw 71 is installed on the output shaft of the movable motor 7, and the lead screw 71 is threadedly connected to the push block 531. A slide rod 72 is installed at the bottom of the lifting bracket 61, and the slide rod 72 is arranged parallel to the lead screw 71. The slide rod 72 passes through the push block 531, and the push block 531 is slidably connected to the slide rod 72. When the movable motor 7 is started, it drives the lead screw 71 to rotate. The rotation of the lead screw 71 drives the push block 531 to move along the slide rod 72, thereby achieving the effect of moving the push roller 53.

[0037] refer to Figure 3 Both the outer wall of the guide roller 52 and the outer wall of the push roller 53 are wrapped with a rubber layer 8. The rubber layer 8 is in flexible contact with the battery cell, reducing the possibility of scratching the battery cell.

[0038] The implementation principle of the winding battery cell extraction and detection device in this application embodiment is as follows: During the movement of the bare battery cell, the bare battery cell first passes through the correction component 5. The correction component 5 corrects the bare battery cell, and the corrected bare battery cell passes under the detection camera 2. The detection camera 2 takes a picture of the bare battery cell to obtain an appearance image 9 of the bare battery cell. After the bare battery cell is corrected by the correction component 5, the left edge and the right edge of the bare battery cell in the appearance image 9 are both perpendicular to the upper edge and the lower edge of the image 9. Then, based on the obtained bare cell appearance image 9, the following heights are obtained: h2 (center position of tab side edge 91), h1 (left side position of tab side edge 91), h3 (right side position of tab side edge 91), h5 (center position of non-tab side edge 92), h4 (left side position of non-tab side edge 92), and h6 (right side position of non-tab side edge 92). The height differences |h2-h1| between the center and left sides of tab side edge 91, |h2-h3| between the center and right sides of tab side edge 91, |h5-h4| between the center and left sides of non-tab side edge 92, and |h5-h6| between the center and right sides of non-tab side edge 92 are calculated. If any of these height differences exceeds a set value, the bare cell is considered unqualified; if all of these height differences do not exceed the set value, the bare cell is considered qualified. This achieves the effect of cell extraction and inspection of bare battery cells, reduces inspection errors caused by visual observation, and improves the accuracy of battery cell extraction and inspection.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A winding cell core extraction and detection device, comprising a frame, characterized in that: A testing bracket is mounted on the frame, and a testing camera is mounted on the testing bracket. A conveying component is mounted below the testing camera. One end of the conveying component is an input end, and the other end is an output end. The conveying component is used to move bare cells from the input end to the output end. A correction component is mounted above the conveying component and is located between the input end and the testing camera. The correction component is used to correct the deviation of the bare cells.

2. The winding cell core extraction and detection device according to claim 1, characterized in that: The conveying assembly includes an input roller, an output roller, several support rollers, and a conveyor belt. The input roller, output roller, and support rollers are all rotatably connected to the frame. The input roller, output roller, and support rollers are arranged in parallel. The support rollers are located between the input roller and the output roller. The conveyor belt is sleeved on the input roller, output roller, and support rollers. The end of the conveyor belt closer to the input roller is the input end, and the end of the conveyor belt closer to the output roller is the output end.

3. The winding cell core extraction and detection device according to claim 2, characterized in that: A conveyor motor is fixedly mounted on the frame, and the output shaft of the conveyor motor is fixedly connected to one end wall of the input roller.

4. The winding cell core extraction and detection device according to claim 1, characterized in that: The correction assembly includes a correction bracket and several guide rollers. The correction bracket is fixedly mounted on the frame. A stop block is provided at the top of each guide roller. The guide rollers are rotatably connected to the stop block. The stop block is slidably mounted on the correction bracket. The guide rollers are located between the input end and the detection camera. The side of the guide rollers away from the detection camera is used to contact the bare battery cell.

5. The winding cell core extraction and detection device according to claim 4, characterized in that: A piston cylinder is fixedly mounted on the correction bracket, and a lifting bracket is fixedly mounted on the output shaft of the piston cylinder. The bottom of the lifting bracket is fixedly connected to the top of the stop block.

6. The winding cell core extraction and detection device according to claim 5, characterized in that: The correction assembly also includes several push rollers, with a push block commonly provided at the top of each push roller. The push rollers and push blocks are rotatably connected. The push blocks are slidably disposed at the bottom of the lifting bracket. The push rollers are located on the side of the stop roller away from the detection camera. The push rollers are arranged parallel to the stop rollers. The side of the push rollers facing the stop rollers is used to contact the bare battery cells.

7. The winding cell core extraction and detection device according to claim 6, characterized in that: A movable motor is fixedly installed at the bottom of the lifting bracket. A lead screw is fixedly installed on the output shaft of the movable motor. The lead screw is threadedly connected to a push block. A slide rod is threaded through the push block. The push block and the slide rod are slidably connected. The slide rod is fixedly connected to the bottom of the lifting bracket. The slide rod is parallel to the lead screw.

8. The winding cell core extraction and detection device according to claim 6, characterized in that: Both the outer walls of the retaining roller and the outer walls of the push roller are provided with rubber layers.

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