Tab detection device

Abstract

The utility model relates to the technical field of batteries, and discloses a tab detection device which is used for detecting the tab state of a battery cell so as to avoid the short circuit of the battery cell. The tab detection device comprises a clamping module, a photographing module, two light source modules and an image processing module. The clamping module is used for clamping two large surfaces of a battery cell, the photographing module comprises two image collectors which are oppositely arranged, the two image collectors are located on the two sides of the battery cell, and the arrangement direction of the two image collectors is perpendicular to the arrangement direction of the two large surfaces of the battery cell and perpendicular to the height direction of the battery cell; therefore, the two image collectors shoot the images of the two side surfaces of the battery cell. The two light source modules are respectively used for providing light sources for the two image collectors. And the image processing module is used for processing the image shot by the image collector so as to detect the state of the tab on the side surface of the battery cell.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a pole lug detection device. BACKGROUND

[0002] At present, in the assembling process of some batteries, after the pole lug is connected with the main body of the battery cell, the pole lug will be bent to the side of the main body of the battery cell, and then welded with the adapter sheet on the side. In this process, the pole lug may have adverse conditions such as tearing, bending, lifting, and mispositioning of welding. If not handled in time, the pole lug is likely to contact the top cover metal part on the top of the main body of the battery cell in the subsequent assembly process, thereby causing the battery cell to short circuit. SUMMARY

[0003] The utility model provides a kind of pole lug detection device, for detecting the pole lug state of the side of battery cell, to prevent pole lug and top cover metal part contact, avoid battery cell short circuit.

[0004] The utility model provides a kind of pole lug detection device, comprising:

[0005] Clamping module, the clamping module is used to clamp the two big faces of battery cell;

[0006] Photographing module, the photographing module includes two image collectors oppositely arranged, the two image collectors are located at the two sides of the battery cell, the arrangement direction of the two image collectors is perpendicular to the arrangement direction of the two big faces of the battery cell and is perpendicular to the height direction of the battery cell, so that the two image collectors shoot the image of the two sides of the battery cell;

[0007] Two light source modules, the two light source modules are used to provide light source for the two image collectors respectively;

[0008] Image processing module, the image processing module is used to process the image shot by the image collector, to detect the pole lug state of the side of the battery cell.

[0009] The pole lug detection device provided by the utility model clamps the two big faces of battery cell by clamping module, so that the two sides of the battery cell with pole lug welded are exposed. Two image collectors are used to shoot the two sides of the battery cell for image acquisition, and then image processing module is used to process the image to detect the state of the pole lug on the side of the battery cell. When detecting that the pole lug is in adverse state, the battery cell can be taken off from production line in time to avoid the battery cell from being assembled, so that the pole lug of the battery cell can be prevented from contacting the cover metal part of the top cover to cause battery cell short circuit. In addition, by setting light source module, light source can be provided for image collector to ensure that image collector can shoot clear image, so that detection accuracy can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structure schematic view of the lug detection device in the embodiment of the utility model;

[0011] Figure 2 It is a structure schematic view of the clamping module clamping the battery cell in the embodiment of the utility model;

[0012] Figure 3 It is a structure schematic view of the driving module in the embodiment of the utility model;

[0013] Figure 4 It is a structure schematic view of the two driving modules in the embodiment of the utility model;

[0014] Figure 5 It is another structure schematic view of the lug detection device in the embodiment of the utility model.

[0015] In the drawing,

[0016] 10-battery cell; 100-carrier plate; 110-avoidance hole; 200-photographing module; 210-image collector; 300-clamping module; 310-clamping plate; 311-first connecting plate; 312-second connecting plate; 3121-waist-shaped hole; 320-cushion pad; 400-light source module; 500-lifting mechanism; 510-bottom plate; 520-driving assembly; 600-driving module; 610-mounting seat; 620-guide rail; 630-driving motor; 640-mounting plate; 700-sliding rail; 800-light shield. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Reference Figure 1 The lug detection device in the embodiments of the utility model can include a carrier plate 100, a photographing module 200, a clamping module 300, a light source module 400 and an image processing module (not shown in the drawing), wherein the photographing module 200, the light source module 400 and the clamping module 300 can be arranged on the carrier plate 100.

[0019] Specifically, the clamping module 300 can be used to clamp the battery cell 10, so that the battery cell 10 is fixed relative to the carrier plate 100. When clamping the battery cell 10, the clamping module 300 is used to clamp two large faces of the battery cell 10, so that two side faces of the battery cell 10 can be exposed. It should be noted that in the present embodiment, when the battery cell 10 is detected, the top of the battery cell 10 faces upwards, and the tab is welded to the side face of the battery cell 10.

[0020] The photographing module 200 includes two image collectors 210 arranged oppositely, and the two image collectors 210 can be located at two sides of the battery cell 10. At this time, the arrangement direction of the two image collectors 210 is perpendicular to the arrangement direction of the two large faces of the battery cell 10 and perpendicular to the height direction of the battery cell 10. That is, the image collector 210 is arranged at the side of the battery cell 10 where the tab is welded, so that the image collector 210 can photograph the image of the side face of the battery cell 10.

[0021] In a specific implementation, the image collector 210 can be a CCD camera.

[0022] The image processing module can be used to process the image photographed by the image collector 210, so as to detect the state of the tab in the image. In the present embodiment, the state of the tab can be understood as the welding state of the tab. Specifically, when the tab is in a poor state, it can be manifested as one or more of the following situations: tab bending, tab tearing, tab lifting, and tab welding misplacement. The working personnel can understand whether the tab of the battery cell 10 under detection is in a poor state according to the analysis result of the image processing module, so that the battery cell 10 can be processed in time to avoid causing the battery cell 10 to be short-circuited.

[0023] The light source module 400 can be two, and the two light source modules 400 can provide light sources for the two image collectors 210, so that the image collector 210 can perform image collection in an environment with sufficient light, and the photographed image is clear, which is conducive to accurate identification by the image processing module.

[0024] It can be understood that the tab detection device in the present embodiment is provided with two image collectors 210, which respectively collect images of two side faces of the battery cell 10, and the image processing module is used for processing and analyzing the collected images, so as to identify the state of the tab in the collected images. In this way, the battery cell 10 with hidden dangers can be found in time, so that the battery cell 10 can be removed from the production line, and the battery cell 10 can be prevented from being short-circuited in the subsequent assembly process.

[0025] In addition, when the image collector 210 photographs the image of the side face of the battery cell 10, the image processing module can also process and analyze the image to detect the condition of the adhesive tape on the side face of the battery cell 10. When it is detected that the adhesive tape on the side face of the battery cell 10 is damaged, wrinkled, or not properly attached, the working personnel can also understand the situation in time, so that the battery cell 10 can be processed.

[0026] In some embodiments, as shown in Figure 1 , the arrangement direction of the two light source modules 400 is the same as that of the two image collectors 210, and the light source modules 400 are arranged on the side of the image collectors 210 away from the battery cell 10. When the image collectors 210 take images, the light source modules 400 emit light sources towards the image collectors 210, so as to make the images taken by the image collectors 210 clear and avoid misjudgment of the image processing module when processing and analyzing images.

[0027] As an optional implementation, the light source module 400 can include a plurality of lamp beads, which can be arranged around the optical axis of the image collector 210. In this way, the plurality of lamp beads can light the image collector 210 from different angles. When a plurality of lamp beads are arranged, the reflection phenomenon caused by the adhesive on the surface of the battery cell 10 can be avoided, so as to ensure that the image collector 210 takes clear images, thereby facilitating the improvement of detection accuracy.

[0028] In some embodiments, continuing to refer to Figure 1 , the tab detection device can further include a jacking mechanism 500, and the clamping module 300 can be arranged on the jacking mechanism 500, so that the jacking mechanism 500 can drive the clamping module 300 to move along the height direction of the battery cell 10. When the clamping module 300 clamps the battery cell 10, the jacking mechanism 500 can drive the battery cell 10 to move between the two image collectors 210, thereby completing image collection. Subsequently, the jacking mechanism 500 can also drive the battery cell 10 to move away from the two image collectors 210, so as to take out the battery cell 10 that has completed detection from the clamping module 300.

[0029] Based on this, as shown in Figure 1 , the jacking mechanism 500 can include a bottom plate 510 and a driving assembly 520, and the clamping module 300 is arranged on the bottom plate 510, and the driving assembly 520 is used to drive the bottom plate 510 to move along the height direction of the battery cell 10. The main body of the driving assembly 520 can be arranged on the side of the carrier plate 100 away from the photographing module, and correspondingly, the carrier plate 100 is provided with a relief hole 110, so that part of the driving assembly 520 can pass through the relief hole 110 and be located on the side of the carrier plate 100 facing the image collector 210.

[0030] The driving assembly 520 can be a pneumatic cylinder, for example. When the driving assembly 520 drives the bottom plate 510 to move along the height direction of the battery cell 10, the bottom plate 510 can run in parallel, thereby ensuring that the clamping module 300 and the battery cell 10 located on the bottom plate 510 can remain stable. In this way, when the battery cell 10 moves to a predetermined position, it can be ensured that the image collector 210 can face the side of the battery cell 10, thereby collecting clear images.

[0031] It can be understood that in the embodiment, the image collector 210 can be kept stationary relative to the carrier plate 100, and only the jacking mechanism 500 needs to be operated to replace the battery cell 10 being detected when different battery cells 10 are continuously detected. By adjusting the position between the bottom plate 510 and the image collector 210, the position of the bottom plate 510 does not need to be adjusted in the horizontal direction during detection, which is beneficial to improve the detection efficiency. In addition, the main body of the driving assembly 520 is arranged below the carrier plate 100, the adjustable space between the bottom plate 510 and the image collector 210 is increased, and the replacement of the battery cell 10 for detection is more convenient.

[0032] Reference Figure 2 The clamping module 300 can include two clamping plates 310 arranged oppositely, and the two clamping plates 310 can be respectively moved along the arrangement direction of the two clamping plates 310 relative to the bottom plate 510, so that the two clamping plates 310 are cooperatively clamped on the battery cell 10 or the gap between the two clamping plates 310 is increased, and the battery cell 10 can be taken out from between the two clamping plates 310.

[0033] As an optional embodiment, as shown in Figure 2 The clamping plate 310 can include a first connecting plate 311 and a second connecting plate 312, and the first connecting plate 311 is perpendicular to the second connecting plate 312, so that the clamping plate 310 as a whole can have an L-shaped structure. The second connecting plate 312 is arranged parallel to the bottom plate 510, and the second connecting plate 312 is located on the side of the first connecting plate 311 away from the battery cell 10. When the two clamping plates 310 clamp the battery cell 10, the two first connecting plates 311 can abut against the two large faces of the battery cell 10 respectively, so that the battery cell 10 cannot move relative to the clamping plate 310. At this time, the second connecting plate 312 can be relatively fixed with the bottom plate 510 to realize the relative fixation between the battery cell 10 and the bottom plate 510.

[0034] The second connecting plate 312 is provided with a waist-shaped hole 3121, and the extension direction of the waist-shaped hole 3121 can be parallel to the arrangement direction of the two clamping plates 310. The bottom plate 510 can also be provided with a screw hole (not shown in the figure). When the second connecting plate 312 is connected with the bottom plate 510, a screw can be sequentially threaded through the waist-shaped hole 3121 and the screw hole to be fixed with the bottom plate 510. When it is necessary to adjust the relative position between the second connecting plate 312 and the bottom plate 510, the second connecting plate 312 can be moved to change the relative position between the waist-shaped hole 3121 and the screw hole, and then the screw is fixed with the waist-shaped hole 3121.

[0035] In the embodiment, when the battery cell 10 needs to be placed on the base plate 510, the two clamping plates 310 can be moved away from each other to increase the distance between the two clamping plates 310. After the battery cell 10 is placed on the base plate 510, the two clamping plates 310 are moved close to each other so that the two clamping plates 310 abut against the two large faces of the battery cell 10, respectively.

[0036] It is worth mentioning that, by setting the two movable clamping plates 310, the device can also be applied to battery cells 10 of different sizes. Different sizes of the battery cell 10 can be understood as battery cells 10 of different thicknesses. When the thickness of the battery cell 10 changes, only the relative position between the two clamping plates 310 needs to be adjusted to change the distance between the two clamping plates 310, so that battery cells 10 of different thicknesses can be clamped.

[0037] In addition, with reference to Figure 2 , the side of the first connecting plate 311 facing the battery cell 10 can also be provided with a buffer pad 320. When the clamping plate 310 moves towards the battery cell 10 to abut against the large face of the battery cell 10, the buffer pad 320 can reduce the impact force on the large face of the battery cell 10, so that the battery cell 10 can be prevented from being damaged during detection. The buffer pad 320 can be, for example, foam, rubber or other materials with buffering capacity, which is not limited in the embodiment.

[0038] In some embodiments, with reference to Figure 1 , the tab detection device can also include a driving module 600, which can be used to drive the image collector 210 to move relative to the carrier plate 100 along the height direction of the battery cell 10, so as to adjust the relative position between the image collector 210 and the battery cell 10. In the embodiment, the height of the clamping module 300 relative to the carrier plate 100 can remain unchanged. After the detection of one of the battery cells 10 is completed, the driving module 600 drives the image collector 210 to move away from the battery cell 10, so as to facilitate the removal of the battery cell 10 and the placement of the next battery cell 10 to be detected in the clamping module 300. After the battery cell 10 is fixed, the driving module 600 drives the image collector 210 to move close to the battery cell 10, so that the image collector 210 can be perpendicular to the side face of the battery cell 10.

[0039] Since the height between the battery cell 10 and the carrier plate 100 remains unchanged, when the light source module 400 is provided, the light source module 400 can be perpendicular to the side face of the battery cell 10, so as to ensure that the image collector 210 can take pictures in an environment with sufficient light each time it moves between the battery cell 10 and the light source module 400. Specifically, the axis direction of the light source module 400 can be parallel to the length direction of the battery cell 10.

[0040] With reference to Figure 1 and Figure 3 , Figure 3The arrow in the figure is used to show the moving direction of the mounting base. The driving module 600 can include a mounting base 610, a guide rail 620, and a driving motor 630. The extension direction of the guide rail 620 is parallel to the height direction of the battery cell 10. The mounting base 610 is movably mounted on the guide rail 620 relative to the guide rail 620 along the extension direction of the guide rail 620. The two image collectors 210 can be fixedly connected to the opposite sides of the mounting base 610, that is, when the driving motor 630 drives the mounting base 610 to move relative to the guide rail 620, the two image collectors 210 can be driven to move synchronously. At this time, the size of the mounting base 610 can be designed so that when the two image collectors 210 are fixed to the mounting base 610, the distance between the two image collectors 210 is greater than the length of the battery cell 10, so as to ensure that the two image collectors 210 can be located on the opposite sides of the battery cell 10.

[0041] In some embodiments, with reference to Figure 4 , the driving module 600 can be two, and the two image collectors 210 are fixedly connected to the two mounting plates 640, so that the two driving modules 600 are respectively used to drive the two image collectors 210 to move along the height direction of the battery cell 10. In addition, the two driving modules 600 can also move away from each other or move close to each other, so as to change the distance between the two image collectors 210, so as to adapt to battery cells 10 of different sizes.

[0042] As shown in Figure 4 , the tab detection device in the embodiment can further include a slide rail 700. The extension direction of the slide rail 700 is parallel to the arrangement direction of the two image collectors 210. The driving module 600 can further include a mounting plate 640. The driving motor 630 and the guide rail 620 can be fixedly connected to the mounting plate 640. The mounting plate 640 is mounted on the slide rail 700 through a sliding block, so that the mounting plate 640 can move relative to the slide rail 700 along the extension direction of the slide rail 700. Since the image collector 210 is fixed to the mounting base 610, when the mounting plate 640 moves relative to the slide rail 700, the image collector 210 can be driven to move relative to the slide rail 700.

[0043] It should be noted that in the embodiment, the distance between the two image collectors 210 is changed to adapt to battery cells 10 of different sizes. The different sizes refer to the length of the battery cell 10, that is, the distance between the two sides of the battery cell 10 where the tabs are welded.

[0044] When the battery cells 10 of different lengths are placed in the detection station, the two mounting plates 640 can be first driven to move to positions corresponding to the sizes of the battery cells 10, and then the image collectors 210 are driven by the driving motor 630 to move towards the battery cells 10 after the distance between the two image collectors 210 is fixed. When the image collectors 210 move to the sides of the battery cells 10, the distance between the image collectors 210 and the sides of the battery cells 10 can be kept fixed when the images of the battery cells 10 of different lengths are captured, because the positions of the image collectors 210 in the horizontal direction are adjusted in advance. In this way, the parameters of the image collectors 210 can be adjusted in advance, so that the image collectors 210 can capture images according to the adjusted parameters when capturing images of different battery cells 10, thereby ensuring the definition of the images.

[0045] In some embodiments, with reference to Figure 1 and Figure 5 The tab detection device can further include a light shield 800, which can surround the light source module 400, the image collector 210 and the battery cell 10 to reduce light pollution, thereby further ensuring the quality of the captured images and improving the detection accuracy.

[0046] In specific implementation, the light shield 800 can include four light shields, which are connected in sequence to form a square space. When the battery cell 10 is detected, the battery cell 10, the light source module 400 and the image collector 210 are located in the square space.

[0047] As described above, the jacking mechanism 500 can be provided to drive the battery cell 10 to move, so that the battery cell 10 is located between the two image collectors 210 or the battery cell 10 is away from the two image collectors 210. When the light shield 800 is provided, the jacking mechanism 500 can be driven to be below the carrier plate 100 when the battery cell 10 is taken out or placed, so that the battery cell 10 is separated from the light shield 800, and the battery cell 10 can be replaced at this time.

[0048] Alternatively, when the height of the battery cell 10 relative to the carrier plate 100 remains unchanged, the camera collector can move away from the battery cell 10 after the detection of the battery cell 10 is completed. At this time, the battery cell 10 can be taken out or placed from above the light shield 800.

[0049] The tab detection device in the embodiment of the utility model can detect the battery cell with the tab welded on the side surface of the battery cell main body to determine the state of the tab. Based on this, two image collectors are arranged in the embodiment of the utility model, the two image collectors are respectively used for shooting the images of the two side surfaces of the battery cell, and the image processing module is used for processing and analyzing the images, so as to determine the state of the tab. Through the above operation, the battery cell with the tab in the poor state can be taken off from the production line in time in the battery cell assembly process, so as to avoid the short circuit of the battery cell in the subsequent assembly process.

[0050] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model belong to the scope of the claims of the utility model and the equivalent technology, the utility model also intends to include these modifications and variations.

Claims

1. A tab detection device, characterized by, The utility model relates to a kind of battery cell detection device, including: Clamping module, the clamping module is used to clamp the two big faces of electric core; Photographing module, the photographing module includes two image collectors oppositely arranged, the two image collectors are located at the two sides of the electric core, the arrangement direction of the two image collectors is perpendicular to the arrangement direction of the two big faces of the electric core, and is perpendicular to the height direction of the electric core, so that the two image collectors photograph the image of the two side faces of the electric core; Two light source modules, the two light source modules are used to provide light source for the two image collectors respectively; Image processing module, the image processing module is used to process the image photographed by the image collector, to detect the tab state of the side face of the electric core.

2. The tab detection apparatus according to claim 1, characterized by The light source module is located at the side of the image collector away from the electric core, and the light source module is arranged around the optical axis of the image collector.

3. The tab detection apparatus according to claim 1, characterized by, It also includes a jacking mechanism, and the jacking mechanism is located below the image collector. The clamping module is arranged on the jacking mechanism, and the jacking mechanism is used to drive the electric core to move along the height direction of the electric core, so that the electric core moves to between the two image collectors.

4. The tab detection apparatus according to claim 3, characterized by The jacking mechanism includes a bottom plate and a driving assembly, the electric core and the clamping module are arranged on the bottom plate, the driving assembly is connected to the side of the bottom plate away from the clamping module, and the driving assembly is used to drive the bottom plate to move along the height direction of the electric core.

5. The tab detection apparatus according to claim 4, characterized by The clamping module includes two clamping plates oppositely arranged, and the clamping plates can move along the arrangement direction of the two clamping plates relative to the bottom plate, so that the two clamping plates are respectively abutted against the two big faces of the electric core.

6. The tab detection apparatus according to claim 5, characterized by The side of the clamping plate facing the electric core is provided with a buffer pad.

7. The tab detection apparatus according to claim 5, characterized by The clamping plate is provided with a waist-shaped hole, the extension direction of the waist-shaped hole is parallel to the arrangement direction of the two clamping plates, and the clamping plate is connected with the bottom plate through a screw installed in the waist-shaped hole. 8.The tab detection apparatus according to claim 1, wherein It also includes a driving module, and the driving module is used to drive the image collector to move along the height direction of the electric core. 9.The tab detection apparatus according to claim 8, characterized in that, The driving module includes a guide rail and a mounting seat, the two image collectors are respectively connected to the opposite sides of the mounting seat, the extension direction of the guide rail is parallel to the height direction of the electric core, and the mounting seat is movably mounted on the guide rail along the extension direction of the guide rail. 10.The tab detection apparatus according to claim 1, wherein The image collector can move along the arrangement direction of the two image collectors, so that the two image collectors are close to or away from each other.

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