Battery cell side face detection mechanism and appearance detection equipment

Abstract

The utility model discloses a battery cell side face detection mechanism and appearance detection equipment, the battery cell side face detection mechanism comprises an execution part and a detection part, and the execution part is used for fixing a battery cell and enabling the battery cell to rotate in the circumferential direction of the execution part; the detection part is provided with a detection station, the detection part is used for detecting when the side face of the battery cell is located at the detection station, the detection part comprises a first detection piece, a second detection piece and a third detection piece, and the detection positions of the first detection piece, the second detection piece and the third detection piece on the battery cell are sequentially arranged in the thickness direction of the battery cell. When side face photographing detection is carried out, the execution component drives the battery cell to rotate, so that defect detection of the four side faces of the battery cell is completed in sequence through the detection component, and the first detection piece, the second detection piece and the third detection piece are arranged in sequence and detect the positions of the different side faces of the battery cell respectively. Therefore, the detection can be realized under the condition that the tab is bent upwards or downwards, and the detection effect of the appearance of the side surface of the battery cell is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery cell appearance detection, and in particular to a battery cell side detection mechanism and an appearance detection device. BACKGROUND

[0002] Battery cell surface defects refer to various undesirable phenomena or imperfections that appear on the surface of a battery cell during its manufacture or use. Battery cell surface defects not only affect the appearance quality of the battery cell, but also can have a negative impact on the performance and safety of the battery cell. Among them, the side surface of the battery cell has a smaller surface area relative to the front and back surfaces, increasing the difficulty of accurately detecting defects in the side surface process. In addition, due to the influence of various forces during production, the shape of the battery cell may change, such as bending upwards or downwards, which also leads to poor detection results. Therefore, the battery cell side detection in the related art cannot comprehensively and accurately detect the defect conditions of the battery cell side. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a battery cell side detection mechanism that can detect even when the tab is bent upwards or downwards, improving the detection effect of battery cell side appearance detection.

[0004] The present application also proposes an appearance detection device comprising the above-mentioned battery cell side detection mechanism.

[0005] According to the battery cell side detection mechanism of the first aspect of the present application, the battery cell side detection mechanism comprises:

[0006] An execution component for fixing the battery cell and rotating the battery cell along its circumferential direction;

[0007] A detection component having a detection station, the detection component being configured to detect when the side surface of the battery cell is in the detection station, the detection component comprising a first detection piece, a second detection piece and a third detection piece, the first detection piece, the second detection piece and the third detection piece being arranged in sequence along the thickness direction of the battery cell.

[0008] The battery cell side detection mechanism according to the first aspect of the present application has at least the following beneficial effects: when performing side surface photographing detection, the execution component drives the battery cell to rotate, thereby completing defect detection of the four side surfaces of the battery cell through the detection component, and by arranging the first detection piece, the second detection piece and the third detection piece in sequence and detecting different side surface positions of the battery cell respectively, detection can be realized even when the tab is bent upwards or downwards, improving the detection effect of battery cell side appearance detection.

[0009] The battery cell side surface detection mechanism according to the first aspect of the present application further comprises a driving component, which is configured to drive the detection component to move relative to the execution component in a direction approaching or moving away from the battery cell, so that the detection component can move along with the rotation of the battery cell.

[0010] The battery cell side surface detection mechanism according to the first aspect of the present application further comprises a light source assembly, which is arranged on the driving component together with the detection component, and is configured to provide light for the visual detection of the detection component.

[0011] The battery cell side surface detection mechanism according to the first aspect of the present application, wherein the light source assembly comprises an arc-shaped light source and a UV light source, and the execution component is provided with a background plate, the position of the background plate is matched with the light source assembly, and the arc-shaped light source and the UV light source are arranged in sequence in the direction from the detection component to the execution component.

[0012] The battery cell side surface detection mechanism according to the first aspect of the present application, wherein the execution component is configured to horizontally fix the battery cell, and the driving component comprises a translation module, which is configured to drive the light source assembly and the detection component to move horizontally along the direction approaching or moving away from the execution component.

[0013] The battery cell side surface detection mechanism according to the first aspect of the present application, wherein the execution component comprises a first driving assembly and a suction disc, the suction disc is arranged on the first driving assembly and is configured to fix the battery cell, and the first driving assembly is configured to drive the suction disc to rotate.

[0014] The battery cell side surface detection mechanism according to the first aspect of the present application, wherein the first driving assembly comprises a worm gear assembly and a servo motor, the servo motor is connected with the worm gear assembly, and the suction disc is arranged on the worm gear assembly.

[0015] The battery cell side surface detection mechanism according to the first aspect of the present application further comprises a conveying component, and the execution component has a plurality of execution components, the conveying component is configured to convey the execution components, so that the battery cells on the execution components can reach the detection positions matched with the detection component in sequence.

[0016] The battery cell side surface detection mechanism according to the first aspect of the present application, wherein the conveying component comprises a turntable assembly, a second driving assembly and a slide rail assembly, the turntable assembly is rotatably arranged on the slide rail assembly about a rotation axis, each execution component is arranged on the turntable assembly in a circumferential distribution with the rotation axis as a reference, and the second driving assembly is configured to drive the turntable assembly to rotate.

[0017] According to the appearance detection device in the second aspect of the present application, the appearance detection device comprises the cell side detection mechanism in the first aspect of the present application.

[0018] It is understandable that the appearance detection device in the second aspect of the present application has the technical effects of the cell side detection mechanism in the first aspect of the present application as described above, and thus will not be described again.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in conjunction with the drawings and embodiments;

[0021] Fig. 1 The structure schematic diagram of the present application is shown in the following figure;

[0022] Fig. 2 The schematic diagram of the execution component in the present application is shown in the following figure;

[0023] Fig. 3 The schematic diagram of the conveying component in the present application is shown in the following figure.

[0024] Reference signs:

[0025] 100, execution component; 110, first driving assembly; 111, worm gear assembly; 112, servo motor; 120, background plate;

[0026] 200, detection component; 210, first detection piece; 220, second detection piece; 230, third detection piece;

[0027] 300, driving component;

[0028] 400, conveying component; 410, rotating disc assembly; 420, second driving assembly; 430, sliding rail assembly;

[0029] 500, light source assembly; 510, arched light source; 520, UV light source. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0031] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In the description of the present application, several meanings are one or more, and multiple meanings are at least two. Greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If the first and second are described, they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0033] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0034] Reference Figs. 1 to 3 The first aspect embodiment of the present application is applied to an appearance detection device, and the cell side detection mechanism includes an execution component 100 and a detection component 200.

[0035] The execution component 100 is used to fix the cell and rotate the cell along the circumferential direction of the cell; the detection component 200 has a detection station, and the detection component 200 is used to detect when the side of the cell is in the detection station. The detection component 200 includes a first detection piece 210, a second detection piece 220 and a third detection piece 230, and the detection positions of the first detection piece 210, the second detection piece 220 and the third detection piece 230 are arranged in the thickness direction of the cell in sequence.

[0036] It can be understood that the execution component 100 fixes the cell and rotates it when it is in the detection station to expose each side to the detection component 200 in sequence. The first detection piece 210, the second detection piece 220 and the third detection piece 230 are arranged for detection at different positions of the cell in the thickness direction, so that the detection can be performed even when the tab is bent upward or downward, ensuring good detection effect.

[0037] In some embodiments, the first detection member 210, the second detection member 220 and the third detection member 230 are sequentially arranged in the vertical direction, so that the first detection member 210 is used to detect the situation of the tab bending upward, the second detection member 220 is used to take a photo of the side surface of the battery cell, and the third detection member 230 is used to detect the situation of the tab bending downward, so as to improve the detection effect of the appearance detection of the side surface of the battery cell.

[0038] In some embodiments, the detection positions of the first detection member 210, the second detection member 220 and the third detection member 230 on the battery cell can be partially overlapped, so as to improve the detection effect of the appearance detection of the side surface of the battery cell in cooperation.

[0039] With reference to Figs. 1 to 3 , the battery cell side surface detection mechanism of the first aspect of the present application, when the execution component 100 drives the battery cell to rotate, the detection component 200 sequentially completes the defect detection of the four side surfaces of the battery cell, and by sequentially arranging the first detection member 210, the second detection member 220 and the third detection member 230 and respectively detecting different side surface positions of the battery cell, the detection can also be realized in the situation of the tab bending upward or downward, so as to improve the detection effect of the appearance detection of the side surface of the battery cell.

[0040] In some embodiments of the present application, with reference to Fig. 1 , the battery cell side surface detection mechanism further comprises a driving component 300, which is used to drive the detection component 200 to move relative to the execution component 100, so that the detection component 200 can move along the direction of relatively approaching or moving away from the battery cell in cooperation with the rotation of the battery cell. It can be understood that when the execution component 100 makes the battery cell rotate, the four side surfaces of the battery cell will face the detection component 200, and the commonly used battery cell models have long side edges and short side edges. Therefore, by driving the detection component 200 to move relative to the execution component 100 through the driving component 300, the detection component 200 can also adaptively switch the camera working distance when the long side edge and the short side edge of the battery cell are switched, so as to improve the detection effect of the appearance detection of the side surface of the battery cell.

[0041] In some embodiments, the driving component 300 drives the detection component 200 to move relative to the execution component 100 in the following ways: the detection component 200 is driven to move to relatively move relative to the execution component 100, the execution component 100 is driven to move to relatively move relative to the detection component 200, or both actions are performed simultaneously. By driving the detection component 200 and the execution component 100 to move respectively, the switching of the camera working distance of the long side edge and the short side edge is completed while the battery cell rotates, so as to improve the detection effect of the appearance detection of the side surface of the battery cell.

[0042] In some embodiments, the cell side detection mechanism is used to detect different cell models, and the driving part 300 is adaptively adjusted according to the side shape of the cell to adjust the driving mode of the driving part 300, so that the detection part 200 and the execution part 100 switch the camera working distance by relatively approaching or moving away, and the side of the cell is accurately detected.

[0043] In some embodiments of the present application, with reference to Fig. 1 , the cell side detection mechanism further comprises a light source assembly 500, and the light source assembly 500 and the detection part 200 are respectively arranged on the driving part 300, and the light source assembly 500 is used to provide light for the visual detection of the detection part 200. It can be understood that the detection effect of the detection part 200 is better by providing illumination through the light source assembly 500, the light source assembly 500 and the detection part 200 are arranged on the driving part 300 and driven by the driving part 300 to adjust the position, so that the overall structure is compact, the work station is reasonably designed and the effect of reducing the occurrence of interference error is realized, thereby improving the efficiency and effect of the cell appearance detection.

[0044] In some embodiments of the present application, the light source assembly 500 comprises an arc-shaped light source 510 and a UV light source 520, and the execution part 100 is provided with a background plate 120, the position of the background plate 120 is matched with the light source assembly 500, and the arc-shaped light source 510 and the UV light source 520 are sequentially arranged along the direction from the detection part 200 to the execution part 100. It can be understood that the arc-shaped light source 510 is used to improve the lighting effect, the UV light source 520 is used to detect whether the cell has overflow glue, and the setting of the background plate 120 makes the photographing detection effect of the detection camera better.

[0045] In some embodiments, the first detection part 210, the second detection part 220 and the third detection part 230 are all detection cameras, and common or appropriate camera models can be selected according to actual needs to ensure the detection effect.

[0046] In some embodiments of the present application, the execution part 100 is used to horizontally fix the cell, and the driving part 300 comprises a translation module, and the translation module is used to drive the light source assembly 500 and the detection part 200 to move horizontally along the direction of approaching or moving away from the execution part 100. It can be understood that the cell is horizontally placed and fixed by the execution part 100, the execution part 100 drives the cell to rotate on the horizontal plane, so that the tab side short side, the non-tab side short side, the negative electrode side and the positive electrode side of the cell are respectively opposite to the detection part 200, the detection part 200 is opposite to the side of the cell and is in a suitable positional relationship, and the camera working distance switching of the long side and the short side is completed by translation, which simplifies the adjustment steps and ensures the detection effect.

[0047] In some embodiments, the placement of the battery cell can be adaptively adjusted and the setting of the translation module can be synchronously adjusted, by limiting the translation direction of the translation module and the rotation plane of the battery cell in the same plane, the effects of simplifying the adjustment steps and ensuring the detection accuracy can be simultaneously achieved.

[0048] In order to reliably fix the battery cell and facilitate the subsequent docking with other stations of the production line or battery cell detection equipment, in some embodiments of the present application, the execution component 100 includes a first driving assembly 110 and a suction cup, the suction cup is arranged on the first driving assembly 110 and is used to fix the battery cell, and the first driving assembly 110 is used to drive the rotation of the suction cup. It can be understood that the reliable fixation of the battery cell is realized by the suction cup, and the subsequent transfer of the battery cell is also facilitated. The first driving assembly 110 is used to drive the rotation of the suction cup, so that the suction cup can drive the battery cell to rotate after fixing the battery cell, so that each side of the battery cell is in turn opposite to the detection component 200.

[0049] In some embodiments of the present application, with reference to Fig. 2 , the first driving assembly 110 includes a worm gear assembly 111 and a servo motor 112, the servo motor 112 is connected with the worm gear assembly 111, and the suction cup is arranged on the worm gear assembly 111. It can be understood that the worm gear assembly 111 is used as a transmission assembly, so that the servo motor 112 can drive the rotation of the suction cup and the battery cell on the suction cup and complete the detection of each side of the battery cell. The servo motor 112 ensures the accuracy of the rotation of the battery cell on the suction cup, and cooperates with the translation module to achieve better detection effect.

[0050] In other embodiments, the transmission assembly can also be other commonly used transmission structures with similar effects but different structures, such as a rotation module, a gear transmission structure, etc.

[0051] When the battery cell side detection mechanism is applied to a production line or a battery cell appearance detection equipment, in order to enable the battery cell to reach different stations to complete different processes, in some embodiments of the present application, the battery cell side detection mechanism further includes a conveying component 400, and the execution component 100 has a plurality of, the conveying component 400 is used to convey the execution component 100, so that the battery cell on each execution component 100 can reach the detection position cooperated with the detection component 200 in turn. It can be understood that the conveying component 400 is used to convey the execution component 100, so that the battery cell can flow on the detection equipment or the production line and reach different stations, thereby improving the detection efficiency of the overall appearance of the battery cell.

[0052] In some embodiments, on the basis of being able to realize the effect of conveying the battery cell to flow on each station of the production line or the detection equipment, the conveying component 400 can also be set as a conveying line assembly or other commonly used conveying structure.

[0053] In some embodiments of the present application, with reference toFig. 3 The conveying component 400 comprises a rotating disc assembly 410, a second driving assembly 420 and a slide rail assembly 430. The rotating disc assembly 410 is rotatably arranged on the slide rail assembly 430, and each execution component 100 is arranged on the rotating disc assembly 410 in a circumferential distribution with the rotating axis as a reference. The second driving assembly 420 is used to drive the rotating disc assembly 410 to rotate. It can be understood that the rotating disc assembly 410 is driven by the second driving assembly 420 and the slide rail assembly 430, so that each execution component 100 can rotate along the rotating axis of the rotating disc assembly 410 and reach different workstations. Specifically, the rotating disc assembly 410 can be arranged to rotate clockwise to realize the switching of the workstations.

[0054] In some embodiments, the slide rail assembly 430 is an air cushion slide rail, and the second driving assembly 420 comprises a DD motor and a servo control electric box. The DD motor and the servo control electric box are arranged to drive the rotating disc assembly 410 to rotate. The air cushion slide rail can limit and guide the movement of the rotating disc assembly 410, thereby improving the movement accuracy.

[0055] In some embodiments of the present application, the cell side detection mechanism includes a side detection camera, a translation module, an arc-shaped light source 510 and a UV (ultraviolet) light source, a turntable, an executor. The execution end is provided on the turntable, and the turntable is used to transfer the cell to different stations. The turntable includes a DD motor, a servo control electric box, and an air cushion slide rail to complete the clockwise rotation of the execution end. The execution end includes a worm gear, a servo motor 112, a background plate 120, and a suction cup, which are used to rotate 90 degrees in sequence to control the tab side short edge, the non-tab side short edge, the negative electrode side edge, and the positive electrode side edge of the cell to face the side detection camera when the execution end rotates to the detection station of the cell side appearance detection mechanism. The three side detection cameras, the arc-shaped light source 510, and the UV light source 520 are provided on the translation module, which is used to control the side camera and the light source to move horizontally along the direction of approaching or moving away from the execution end, while the execution end can rotate by itself to control the tab side short edge, the non-tab side short edge, the negative electrode side edge, and the positive electrode side edge of the cell to face the side detection camera, respectively. Specifically, according to the positional relationship of the three side detection cameras in the vertical direction, they can be divided into an upper side detection camera, a middle side detection camera, and a lower side detection camera. At the same time, the upper side detection camera and the lower side detection camera are used to detect the tab in the case of upward bending or downward bending. The cell is transported to the detection station for side photographing detection, the execution end drives the cell to rotate, and the defect detection of the four sides of the cell is completed in sequence. At the same time of cell rotation, the translation module drives the detection mechanism to translate, and the camera working distance switching of the long side edge and the short side edge is completed. The UV light source 520 is used to detect whether the cell has overflow glue. If there is overflow glue, the image generated after the UV light source 520 shoots will have a fluorescent feature. The present application rotates the cell to the detection position, performs side photographing detection, drives the cell to rotate by the execution end, and completes the defect detection of the four sides of the cell in sequence. The setting of the three side detection cameras improves the detection effect of the cell side appearance detection.

[0056] The appearance detection device of the second aspect embodiment of the present application can be an appearance detection device for the cell body and the tab. The appearance detection device includes the cell side detection mechanism of the first aspect embodiment of the present application.

[0057] It is not difficult to understand that the appearance detection device in the second aspect embodiment of the present application has the technical effects of the cell side detection mechanism in the first aspect embodiment as described above, and thus will not be described again.

[0058] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0059] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A battery cell side inspection mechanism, characterized in that, include: An actuator is used to fix the battery cell and make the battery cell rotate around its own circumference; The detection component has a detection station. The detection component is used to perform detection when the side of the battery cell is in the detection station. The detection component includes a first detection element, a second detection element, and a third detection element. The detection positions of the first detection element, the second detection element, and the third detection element are arranged sequentially along the thickness direction of the battery cell.

2. The cell side inspection mechanism according to claim 1, characterized in that: The cell side detection mechanism also includes a driving component, which drives the detection component to move relative to the execution component, so that the detection component can move in a direction relatively close to or away from the cell in coordination with the rotation of the cell.

3. The cell side inspection mechanism according to claim 2, characterized in that: The cell side inspection mechanism also includes a light source assembly. The light source assembly and the inspection component are respectively disposed on the driving component. The light source assembly is used to provide illumination for the visual inspection of the inspection component.

4. The cell side inspection mechanism according to claim 3, characterized in that: The light source assembly includes an arched light source and a UV light source. The execution component is provided with a background plate, the position of which is matched with the light source assembly. The arched light source and the UV light source are arranged sequentially along the direction from the detection component to the execution component.

5. The cell side inspection mechanism according to claim 3, characterized in that: The actuator is used to horizontally fix the battery cell, and the drive component includes a translation module, which is used to drive the light source assembly and the detection component to move horizontally along a direction close to or away from the actuator.

6. The cell side inspection mechanism according to claim 1, characterized in that: The actuating component includes a first driving assembly and a suction cup. The suction cup is disposed on the first driving assembly and is used to fix the battery cell. The first driving assembly is used to drive the suction cup to rotate.

7. The cell side inspection mechanism according to claim 6, characterized in that: The first drive assembly includes a worm gear assembly and a servo motor, the servo motor being connected to the worm gear assembly, and the suction cup being disposed on the worm gear assembly.

8. The cell side inspection mechanism according to claim 1, characterized in that: The cell side detection mechanism also includes a conveying component. There are multiple execution components. The conveying component is used to convey the execution components so that the cells on each execution component can sequentially reach the detection position that cooperates with the detection component.

9. The cell side inspection mechanism according to claim 8, characterized in that: The conveying component includes a turntable assembly, a second drive assembly, and a slide rail assembly. The turntable assembly is rotatably mounted on the slide rail assembly about a rotation axis. Each of the actuating components is circumferentially distributed on the turntable assembly with the rotation axis as a reference. The second drive assembly is used to drive the turntable assembly to rotate.

10. An appearance inspection device, characterized in that, include: The cell side inspection mechanism as described in any one of claims 1 to 9.

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