Tab detection device

Abstract

The utility model relates to the technical field of battery cells, and discloses a tab detection device which comprises a conveying mechanism, an upper photographing module, a lower photographing module, a side photographing module and an end face photographing module. Wherein the upper part of the conveying mechanism is suitable for placing a carrier, and a battery cell is suitable for being placed on the carrier; the conveying mechanism is provided with a photographing position, and the upper photographing module is used for photographing the upper surface of the tab to obtain an upper surface image of the tab. The tab detection device comprises five photographing modules, and the five photographing modules are used for photographing and obtaining images of the upper surface, the lower surface, the two side faces and the end face of the tab respectively, so that all-directional defects of the five faces of the tab are overcome in the battery cell transferring process, and whether the tab has defects or not is judged according to the obtained tab images. And defective tabs are discharged into the waste bin, so that the outflow ratio of the defective tabs can be reduced, the safety performance of the battery is improved, and the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field of battery cell, specifically relates to a tab detection device. BACKGROUND

[0002] The tab is prone to folding in the process of laminating, and the online CCD (charge coupled device) detection of the laminating machine can only detect the upward bending of the tab, but cannot detect the abnormality such as downward folding, full folding, defect or tearing, resulting in a high abnormal tab outflow rate, and the battery product with abnormal tab outflow may cause thermal runaway, causing a major safety accident. SUMMARY

[0003] Therefore, the utility model provides a tab detection device to solve the problem of high abnormal tab outflow rate in the prior art through online CCD detection in the laminating process.

[0004] In the first aspect, the utility model provides a tab detection device, which comprises:

[0005] A conveying mechanism is provided, and the upper part is suitable for placing a carrier, and the battery cell is suitable for being placed on the carrier; the conveying mechanism has a photographing position;

[0006] An upper photographing module is arranged at the photographing position and is used for shooting the upper surface of the tab to obtain an upper surface image of the tab;

[0007] A lower photographing module is arranged at the photographing position and is used for shooting the lower surface of the tab to obtain a lower surface image of the tab;

[0008] A side photographing module is arranged at the photographing position and is used for shooting the two side surfaces of the tab to obtain two side surface images of the tab;

[0009] An end surface photographing module is arranged at the photographing position and is used for shooting the end surface of the tab to obtain an end surface image of the tab.

[0010] The tab detection device has the advantages that the tab detection device comprises five photographing modules, the five photographing modules are used for shooting and obtaining the images of the upper surface, the lower surface, the two side surfaces and the end surface of the tab respectively, the five surface defects of the tab can be detected during the transfer of the battery cell, whether the tab has defects can be judged according to the obtained tab images, the defective tab can be discharged into the waste bin, the outflow ratio of the defective tab can be reduced, and the safety performance and service life of the battery can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0012] Figure 1 It is a first angle schematic view of the tab detection device of the embodiment of the present application.

[0013] Figure 2 It is a second angle schematic view of the tab detection device shown in the figure. Figure 1

[0014] Figure 3 It is a top view of the tab detection device shown in the figure. Figure 1

[0015] Explanation of reference signs:

[0016] 1, conveying mechanism; 11, upper photographing position; 12, lower photographing position; 13, first side photographing position; 14, second side photographing position; 2, carrier; 3, battery cell; 31, tab; 4, upper photographing module; 41, upper photographing mechanism; 5, lower photographing module; 51, lower photographing mechanism; 52, lower reflecting prism; 6, side photographing module; 61, side photographing mechanism; 62, side reflecting prism; 7, end surface photographing module; 71, end surface photographing mechanism. Specific embodiments

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] ​​The electric core comprises an electric core body, the electric core body comprises a diaphragm and two kinds of pole pieces with opposite polarities, namely a positive pole piece and a negative pole piece, and the electric core body works through the movement of metal ions between the positive pole piece and the negative pole piece. The cycle process of the electric core is the process that the metal ions move from the positive pole piece to the negative pole piece and then move from the negative pole piece to the positive pole piece. The electric core further comprises a pole lug, the pole lug is electrically connected with the pole piece, wherein the positive pole lug is electrically connected with the positive pole piece, and the negative pole lug is electrically connected with the negative pole piece, and the electric core realizes charging and discharging through the positive pole lug and the negative pole lug. The pole piece comprises a current collector and an active material layer, and the active material layer is coated on the surface of the current collector. If the pole piece is the positive pole piece, the material of the current collector can be aluminum, and the material of the active material layer can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. If the pole piece is the negative pole piece, the material of the current collector can be copper, and the material of the active material layer can be carbon or silicon, etc. The diaphragm is used as an insulating layer to prevent the short circuit inside the battery caused by the contact between the positive pole piece and the negative pole piece, and is used as a semi-permeable layer to prevent the passage of large molecules and allow the passage of small charged ions.

[0019] The embodiments of the utility model will be described below in combination with Figures 1 to 3 , the embodiments of the utility model.

[0020] According to the embodiments of the utility model, on the one hand, a pole lug detection device is provided, which comprises a conveying mechanism 1, an upper photographing module 4, a lower photographing module 5, a side photographing module 6 and an end surface photographing module 7.

[0021] The upper part of the conveying mechanism 1 is suitable for placing a carrier 2, and the electric core 3 is suitable for being placed on the carrier 2; the conveying mechanism 1 has a photographing position; the upper photographing module 4 is arranged at the photographing position and is used for shooting the upper surface of the pole lug 31 to obtain an upper surface image of the pole lug 31; the lower photographing module 5 is arranged at the photographing position and is used for shooting the lower surface of the pole lug 31 to obtain a lower surface image of the pole lug 31; the side photographing module 6 is arranged at the photographing position and is used for shooting the two sides of the pole lug 31 to obtain two side images of the pole lug 31; and the end surface photographing module 7 is arranged at the photographing position and is used for shooting the end surface of the pole lug 31 to obtain an end surface image of the pole lug 31.

[0022] As shown in Figures 1 to 3 , the two ends of the electric core 3 in the length direction are provided with pole lugs 31, wherein the side of the pole lug 31 refers to the two sides parallel to the long side of the electric core 3, and the end surface of the pole lug 31 refers to the end surface parallel to the length direction of the electric core 3.

[0023] The tab detection device of the structure comprises five photographing modules, and the five photographing modules are used for respectively shooting and acquiring images of the upper surface, the lower surface, the two side surfaces and the end surface of the tab 31, so that omnidirectional defects of the five surfaces of the tab 31 are realized in the transfer process of the battery cell 3. Whether the tab 31 is defective is judged according to the acquired tab 31 image, and the defective tab 31 is discharged into the waste bin, so that the outflow ratio of the defective tab 31 can be reduced, and the safety performance and service life of the battery can be improved.

[0024] As shown in Figure 1 and Figure 2 , the photographing position comprises an upper photographing position 11, and the upper photographing module 4 comprises an upper photographing mechanism 41 arranged at the upper photographing position 11 and an upper light source. The upper light source and the upper photographing mechanism 41 are sequentially arranged above the tab 31. After the battery cell 3 is transported to the upper photographing position 11 and paused, the upper photographing mechanism 41 cooperates with the upper light source to acquire a clear upper surface image of the tab 31, and whether the upper surface of the tab 31 is defective is judged according to the upper surface image of the tab 31. The upper photographing module 4 is provided with two groups, and the two groups of upper photographing modules 4 are respectively arranged above the positive and negative tabs 31 at both ends of the battery cell 3, so as to respectively acquire the upper surface images of the positive and negative tabs 31.

[0025] In some embodiments, the photographing position comprises a lower photographing position 12, and the lower photographing module 5 comprises a lower photographing mechanism 51 arranged at the lower photographing position 12, a lower light source and a lower reflection prism 52. The lower reflection prism 52 is arranged below the tab 31, and the lower light source and the lower photographing mechanism 51 are sequentially arranged outside the side of the lower reflection prism 52. The lower reflection prism 52 is used for converting the light propagating in the vertical direction into the horizontal direction. The lower surface of the conveying surface needs to be arranged with a logistics line, and the logistics line also needs to be maintained from the lower surface of the conveying surface. The lower photographing module 5 changes the propagation direction of the light through the lower reflection prism 52, so that the lower photographing mechanism 51 is arranged outside the side of the lower reflection prism 52 and extends horizontally, which can reduce the space occupied by the bottom of the conveying mechanism 1, facilitate the arrangement of the logistics line and the maintenance of the conveying mechanism 1 from the bottom.

[0026] In some optional embodiments, as shown in Figures 1 to 3 , the tabs 31 at both ends of the battery cell 3 are arranged in a suspended manner, that is, the tabs 31 protrude outward from the carrier 2 and the conveying mechanism, so as to facilitate the arrangement of the lower reflection prism 52 below the tabs 31.

[0027] In other embodiments, the tabs 31 extend to the outside of the carrier 2, the carrier is located inside the conveying mechanism, and a transparent area is arranged on the conveying mechanism below the tabs. The lower reflection prism 52 is arranged below the transparent area, so as to facilitate the shooting and acquisition of the lower surface image of the tab 31 through the transparent area.

[0028] In the present embodiment, as shown in Figure 2As shown, the slope of the lower reflection prism 52 faces the lower surface of the tab 31 and the lower photographing mechanism 51, and the light rays propagating from the lower surface of the tab 31 to the lower reflection prism 52 are perpendicular to the light rays propagating from the lower reflection prism 52 to the lower photographing mechanism 51, so that the lower photographing mechanism 51 can capture the lower surface of the tab 31, and the accurate image of the tab 31 can be obtained.

[0029] Similarly, the lower photographing module 5 is also provided with two groups, and the two groups of lower photographing modules 5 are used to capture the lower surface images of the positive tab 31 and the negative tab 31 respectively.

[0030] As shown in the drawings, Figures 1 to 3 In some embodiments, the upper photographing position 11 and the lower photographing position 12 are arranged along the conveying direction of the conveying mechanism 1, so that the upper photographing module 4 and the lower photographing module 5 are arranged along the conveying direction of the conveying mechanism 1, and the upper photographing mechanism 41 and the lower photographing mechanism 51 are not arranged in a vertical manner, so that the upper and lower light sources do not interfere with each other during photographing, and the photographing effect is not affected.

[0031] As shown in the drawings, Figure 1 and Figure 2 In some embodiments, the photographing position includes a side photographing position, and the side photographing module 6 is also provided with two groups, and the two groups of side photographing modules are arranged outside the two sides of the tab 31 respectively; each group of side photographing modules 6 includes a side photographing mechanism 61 arranged in the side photographing position, a side light source, and a side reflection prism 62 arranged outside the side of the tab 31, and the side light source and the side photographing module are arranged above the side reflection prism 62 in sequence; the side reflection prism 62 is used to convert the light rays propagating in the horizontal direction into the vertical direction. The side reflection prism 62 is arranged outside the side of the tab 31, so that the side photographing mechanism 61 can be arranged above the side reflection prism 62, the length occupied by the side photographing module 6 along the conveying direction of the conveying mechanism 1 can be reduced, and thus the space utilization rate can be improved, and the occupied space of the tab detection device can be reduced.

[0032] As shown in the drawings, Figure 1 and Figure 2 Each group of side photographing modules includes two side photographing mechanisms 61 and two side reflection prisms 62, and the two side reflection prisms 62 are arranged outside the sides of the positive tab 31 and the negative tab 31 respectively. The side reflection prism 62 can be arranged in a lifting manner, and when the battery cell 3 needs to pass through the side reflection prism 62, the side reflection prism 62 is lowered, and when the battery cell 3 reaches the side photographing position, the side reflection prism 62 is raised so that the slope of the side reflection prism 62 is aligned with the side of the tab 31.

[0033] As shown in the drawings, Figure 1As shown, in some embodiments, the side-viewing positions include a first side-viewing position 13 and a second side-viewing position 14 spaced apart in the conveying direction of the conveying mechanism 1; two sets of side-viewing modules 6 are respectively arranged in the first side-viewing position 13 and the second side-viewing position 14. This arrangement allows the two sets of side-viewing modules 6 to be spaced apart, avoiding them being arranged opposite each other in the same viewing position. This can effectively prevent the light sources arranged opposite each other from interfering with each other and affecting the shooting effect of the side-viewing mechanism 61.

[0034] In some embodiments, the side imaging mechanism 61 includes a side camera and a liquid lens, and the side light source includes a ring light source. The liquid lens captures multiple images of the multi-layered tabs 31 on the side of the tab 31 at different focal lengths, and these images are then fused into a single clear image, enabling the capture and detection of defect features on the side of the tab 31. The ring light source provides uniform illumination, which helps the side imaging mechanism 61 obtain clear images of the side of the tab 31, improving detection accuracy.

[0035] like Figures 1 to 3 As shown, in some embodiments, the end-face imaging module 7 includes an end-face imaging mechanism 71 and an end-face light source, which are sequentially disposed on the outside of the end face of the tab 31. After the battery cell 3 is delivered into position, the end-face imaging mechanism 71, in conjunction with the end-face light source, acquires an image of the end face of the tab 31. Two sets of end-face imaging modules 7 are provided, with the two sets of end-face imaging modules 7 respectively disposed on the outside of the end faces of the positive tab 31 and the negative tab 31.

[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the end-face photography mechanism 71 is located above the lower photography mechanism 51, that is, the end-face photography module 7 and the lower photography module 5 share a photography position. This arrangement will not affect the two types of cameras, can ensure the photography effect, and can save layout space and improve space utilization.

[0037] The end-face imaging mechanism 71 and the lower imaging mechanism 51 are coplanar and their extension directions are parallel. The lower light source and the end-face light source are integrated into a surface array light source. This integrated design simplifies the light source structure and reduces costs while ensuring illumination.

[0038] In some embodiments, such as Figures 1 to 3 As shown, the electrode detection device includes two conveying mechanisms 1, each with five imaging modules on its side. A support frame is provided on the side of each conveying mechanism 1, and the camera, light source, and prism are mounted on the support frame. The imaging modules on the sides of the two conveying mechanisms 1 are arranged opposite each other, which improves space utilization. For example, along... Figure 1The photographing modules from left to right of the upper conveying mechanism 1 are in sequence the upper photographing module 4, the side photographing module 6, the end photographing module 7 and the lower photographing module 5. Figure 1 The photographing modules from right to left of the lower conveying mechanism 1 are in sequence the upper photographing module 4, the side photographing module 6, the end photographing module 7 and the lower photographing module 5. The end photographing camera and the lower photographing camera at the side of the two conveying mechanisms 1 are staggered along the length direction of the conveying mechanism 1, which can prevent the horizontally arranged end photographing camera and the lower photographing camera from occupying too much space along the width direction of the conveying mechanism 1, and the whole mechanism space utilization is more reasonable and efficient.

[0039] Optionally, the sequence of the photographing modules can be flexibly adjusted according to actual needs.

[0040] In some optional embodiments, the upper photographing mechanism 41 includes a 500-megapixel camera and an FA lens, and the upper light source includes a ring-shaped light source.

[0041] In some embodiments, the lower photographing mechanism 51 includes a 500-megapixel camera and an FA lens; the end photographing mechanism 71 includes a 2000-megapixel camera and an FA lens. The side photographing camera includes a 1200-megapixel camera.

[0042] In some embodiments, the tab detection device further includes a detection module, which is configured to process the upper surface image, the lower surface image, the two side surface images and the end surface image of the tab 31 and generate a detection result.

[0043] When the tab detection device is in operation, the battery cell 3 is placed on the carrier 2, and the tabs 31 at both ends of the battery cell 3 are extended out of the carrier 2 and suspended above the conveying mechanism 1. The conveying mechanism 1 pauses after conveying the battery cell 3 to the upper photographing position 11, and the upper photographing camera captures the upper surface image of the tab 31. If the detection is abnormal, the battery cell 3 is marked and discharged to the waste bin. If the detection is normal, the conveying mechanism 1 continues to convey the battery cell 3 to the first side photographing position 13, and the side photographing camera captures the side surface image of the tab 31. If the detection is abnormal, the battery cell 3 is marked and discharged to the waste bin. If the detection is normal, the conveying mechanism 1 continues to convey the battery cell 3 to the second side photographing position 14. If the detection is abnormal, the battery cell 3 is marked and discharged to the waste bin. If the detection is normal, the conveying mechanism 1 continues to convey the battery cell 3 to the upper photographing position 11, and the upper photographing camera and the end photographing camera capture the lower surface and end surface images of the tab 31. If the detection is abnormal, the battery cell 3 is marked and discharged to the waste bin. If the detection is normal, the mechanical hand is lowered to clamp the battery cell 3 to realize discharging.

[0044] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the appended claims.

Claims

1. A tab detection device, characterized in that, include: The conveying mechanism (1) is adapted to place a carrier (2) on its upper part, and the battery cell (3) is adapted to be placed on the carrier (2); the conveying mechanism (1) has a photo-taking position; The upper photographing module (4) is located at the photographing position and is used to photograph and obtain an image of the upper surface of the electrode (31) from the upper surface of the electrode (31); The lower photographing module (5) is located at the photographing position and is used to photograph and obtain an image of the lower surface of the electrode (31) from the lower surface of the electrode (31); A side-viewing module (6) is provided at the viewing position and is used to capture images of the two sides of the electrode (31) from the two sides of the electrode (31); An end-face photography module (7) is located at the photography position and is used to capture an image of the end face of the tab (31) from the end face of the tab (31).

2. The electrode detection device according to claim 1, characterized in that, The shooting position includes an upper shooting position (11), and the upper shooting module (4) includes an upper shooting mechanism (41) and an upper light source disposed on the upper shooting position (11). The upper light source and the upper shooting mechanism (41) are disposed above the tab (31) in sequence.

3. The electrode detection device according to claim 2, characterized in that, The shooting position includes a lower shooting position (12), and the lower shooting module (5) includes a lower shooting mechanism (51), a lower light source and a lower reflecting prism (52) disposed in the lower shooting position (12). The lower reflecting prism (52) is disposed below the tab (31), and the lower light source and the lower shooting mechanism (51) are disposed sequentially outside the side of the lower reflecting prism (52). And / or, the tabs (31) at both ends of the battery cell (3) are suspended or a transparent area is provided below the tabs (31).

4. The electrode detection device according to claim 3, characterized in that, The upper photographing position (11) and the lower photographing position (12) are arranged at intervals along the conveying direction of the conveying mechanism (1).

5. The electrode detection device according to any one of claims 1 to 4, characterized in that, The shooting position includes a side shooting position. The side shooting module (6) is provided in two sets. The two sets of side shooting modules are respectively located on the two sides of the tab (31). Each set of side shooting modules (6) includes a side shooting mechanism (61) located at the side shooting position, a side light source and a side reflecting prism (62). The side reflecting prism (62) is located on the side of the tab (31). The side light source and the side shooting module are sequentially located above the side reflecting prism (62).

6. The electrode detection device according to claim 5, characterized in that, The side-view camera positions include a first side-view camera position (13) and a second side-view camera position (14) spaced apart in the conveying direction of the conveying mechanism (1); the two sets of side-view camera modules (6) are respectively located at the first side-view camera position (13) and the second side-view camera position (14).

7. The electrode detection device according to claim 5, characterized in that, The side-mounted camera mechanism (61) includes a side-mounted camera and a liquid lens, and the side light source includes a ring light source.

8. The electrode detection device according to claim 3, characterized in that, The end-face photography module (7) includes an end-face photography mechanism (71) and an end-face light source, wherein the end-face light source and the end-face photography mechanism (71) are sequentially disposed on the outside of the end face of the tab (31).

9. The electrode detection device according to claim 8, characterized in that, The end face photography mechanism (71) is located above the lower photography mechanism (51).

10. The electrode detection device according to claim 9, characterized in that, The lower light source and the end face light source are integrated into a surface array light source.

11. The electrode detection device according to any one of claims 1 to 4, characterized in that, It also includes a detection module, which is used to process the upper surface image, lower surface image, two side images and end face image of the electrode and generate detection results.

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