Laminated cell tab defect detection device and detection method

Abstract

The invention discloses a laminated cell tab defect detection device, which comprises a conveying mechanism, a detection mechanism and a processing unit, the conveying mechanism is used for conveying a laminated cell to a detection station, the detection mechanism comprises two groups of first detection assemblies, each group of first detection assemblies corresponds to one tab, and the processing unit is used for processing the two groups of first detection assemblies. Each first detection assembly comprises a first camera and a second camera, and the first cameras are configured to shoot images of the end faces and the first side faces of the corresponding tabs and send shot image information to the processing unit. The second camera is configured to shoot images of the end face and the second side face of the corresponding tab and send shot image information to the processing unit; the processing unit is configured to process the image information sent by the first camera and the second camera so as to judge whether the corresponding tabs have defects or not; according to the detection device, the end face, the first side face and the second side face of the laminated cell can be shot, and the accuracy and precision of the tab defect detection of the laminated cell are improved.

Description

Technical Field

[0001] This application belongs to the technical field of visual inspection of battery cells, and particularly relates to a device and method for detecting defects of tabs of stacked battery cells. Background Art

[0002] A stacked battery cell stacks materials such as the positive electrode sheet, separator, and negative electrode sheet of the battery in a certain manner to form a complete battery cell structure. The stacked battery cell usually includes a battery cell body and two tabs respectively located at both ends of the battery cell body. The tabs are important components in the battery, and the electrical connection inside and outside the battery is realized through the tabs.

[0003] During the production process of stacked battery cells, it is necessary to detect the defects of the tabs of the multi-layer structure of the stacked battery cells to determine whether there are problems such as folding and missing of each layer of tabs. The existing detection methods are mainly divided into manual detection and CCD visual detection. The manual detection has low detection efficiency and large detection errors; while the existing CCD visual detection usually only takes pictures of a single side of the tab, and processes and analyzes the pictures of the single side to judge whether there are defects in each layer of tabs, resulting in the problem of low detection accuracy. Summary of the Invention

[0004] The purpose of this application is to provide a device for detecting defects of tabs of stacked battery cells to solve the problem of low detection accuracy in the existing detection of defects of tabs of stacked battery cells. Another purpose of this application is to provide a detection method based on the device for detecting defects of tabs of stacked battery cells.

[0005] To achieve this purpose, this application adopts the following technical solutions:

[0006] In the first aspect, this application proposes a device for detecting defects of tabs of stacked battery cells. One tab is provided at each end of the stacked battery cell along its length direction. The tab is a square structure as a whole. The tab includes an end face, a top face, a bottom face, a first side face, and a second side face. The device for detecting defects of tabs of stacked battery cells includes a conveying mechanism, a detection mechanism, and a processing unit, where:

[0007] A detection station is provided on the conveying path of the conveying mechanism. The conveying mechanism is configured to convey the stacked battery cell along a first direction to the detection station. The stacked battery cell at the detection station extends along a second direction. The first direction and the second direction are perpendicular;

[0008] The detection mechanism includes two groups of first detection components, which are respectively arranged on both sides of the detection station along the first direction. Each group of the first detection components corresponds to one of the tabs. Each group of the first detection components includes a first camera and a second camera. The first camera is configured to capture images of the end face and the first side face of the corresponding tab and send the captured image information to the processing unit. The second camera is configured to capture images of the end face and the second side face of the corresponding tab and send the captured image information to the processing unit;

[0009] The processing unit is configured to process the image information sent by the first camera and the second camera, and then determine whether there are defects in the corresponding tab according to the processing result.

[0010] Optionally, the detection mechanism further includes a second detection component, which is arranged above the detection station. The second detection component is configured to perform an appearance detection on the upward-facing surface of the stacked battery cell on the detection station.

[0011] Optionally, the second detection component includes a base, at least one third camera, and two strip light sources, where:

[0012] The base is fixedly installed above the detection station. The third camera is installed on the base. The shooting end of at least one third camera faces downward and the shooting range covers the upward-facing surface of the stacked battery cell on the detection station;

[0013] The two strip light sources are arranged at intervals on both sides of the base. The strip light sources extend along the second direction. The two strip light sources are configured to illuminate the stacked battery cell when the first camera, the second camera, and the third camera are shooting.

[0014] Optionally, the detection mechanism further includes a barcode scanner, which is installed above the detection station. The barcode scanner is configured to scan the identification code on the upward-facing surface of the stacked battery cell on the detection station to identify the identity information of the stacked battery cell on the detection station.

[0015] Optionally, the stacked battery cell tab defect detection device further includes a number of battery cell toolings, which are configured to carry and position the stacked battery cell. The conveying mechanism is configured to carry and convey the battery cell tooling along the first direction to the detection station, so that the stacked battery cell on the battery cell tooling is moved to the detection station.

[0016] Optionally, a lifting assembly is provided at the detection station on the conveying mechanism. The lifting assembly includes a first driving member and a lifting member, wherein: the lifting member is installed on the conveying mechanism in a liftable manner and is located below the battery cell tooling; the fixed end of the first driving member is installed on the conveying mechanism, the driving end of the first driving member is connected to the lifting member, and the first driving member is configured to drive the lifting member to lift. The first driving member drives the lifting member to rise by a preset height to lift the battery cell tooling at the detection station to a suspended state.

[0017] Optionally, a set of limiting assemblies are provided on both sides of the detection station of the conveying mechanism along the second direction. The limiting assemblies include second driving members and limiting members, wherein: the limiting members are rotatably installed on the conveying mechanism, the driving ends of the second driving members are connected to the limiting members, and the second driving members are configured to drive the limiting members to rotate so that the limiting members are switched to a limiting state or an avoidance state;

[0018] The second driving members of the two sets of limiting assemblies drive the corresponding limiting members to rotate upward to the limiting state, so as to respectively abut against both sides of the battery cell tooling at the detection station in the first direction through the two limiting members, thereby positioning the battery cell tooling at the detection station.

[0019] The second driving members of the two sets of limiting assemblies drive the corresponding limiting members to rotate downward to the avoidance state, so that the two limiting members move below the bottom surface of the battery cell tooling, thereby avoiding the removal of the stacked battery cells after detection from the detection station and the entry of the next stacked battery cell to be detected into the detection station.

[0020] Optionally, the conveying mechanism is the first conveyor line of the battery cell production line of a battery cell manufacturer. The first conveyor line is configured to receive the stacked battery cells from the previous process of the battery cell production line and convey the received stacked battery cells to the detection station along the first direction. The first conveyor line is also configured to convey the stacked battery cells after the ear defect detection at the detection station to the next process of the battery cell production line along the first direction.

[0021] Alternatively, the conveying mechanism is a second conveyor line on a first conveyor line that docks with the battery cell production line of a battery cell manufacturer. The first conveyor line is configured to receive the stacked battery cells from the previous process on the battery cell production line and convey the received stacked battery cells in the first direction to a transfer station. The second conveyor line is configured to receive the stacked battery cells at the transfer station and convey the received stacked battery cells to the inspection station for tab defect inspection. The second conveyor line is further configured to convey the stacked battery cells after tab defect inspection to the first conveyor line. The first conveyor line is further configured to convey the received inspected stacked battery cells in the first direction to the next process of the battery cell production line.

[0022] Optionally, the first camera and the second camera are arranged at intervals in the first direction. The shooting ends of the first camera and the second camera both face the corresponding tabs. The included angle between the shooting ends of the first camera and the second camera and the second direction is 45°.

[0023] In a second aspect, the present application provides a method for detecting tab defects of stacked battery cells, which is implemented by the above-mentioned tab defect detection device for stacked battery cells, and includes the following steps:

[0024] The conveying mechanism receives the stacked battery cells to be tested and conveys the received stacked battery cells to the inspection station;

[0025] The first cameras and the second cameras of the two groups of first detection components take pictures of the corresponding tabs to obtain two images of the corresponding tabs and send the two obtained images to the processing unit. The first image includes the end face and the first side face of the corresponding tab, and the second image includes the end face and the second side face of the corresponding tab;

[0026] The processing unit processes the two images of the corresponding tabs received, and judges whether there are defects in the corresponding tabs according to the processing results. When the processing unit processes the two images of the corresponding tabs, it includes image screening or image fusion processing of the end face parts in the two images of the corresponding tabs.

[0027] The beneficial effects of the tab defect detection device for stacked battery cells proposed in the present application are as follows:

[0028] 1) It can take pictures of the end face, the first side face and the second side face of the tabs of the stacked battery cells, process the images according to the image information of the three faces, and then judge whether there are defects in the tabs of the stacked battery cells, improving the accuracy and precision of the tab defect detection of the stacked battery cells;

[0029] 2) The image information of the end face part included in both of the two images captured by the first camera and the second camera. The processing unit processes the images of the end face part in the two images of the same tab, further improving the accuracy and precision of the tab defect detection of the stacked battery cell;

[0030] 3) Synchronous tab defect detection of the two tabs of the stacked battery cell is realized at the same detection station, improving the detection efficiency;

[0031] 4) The second detection component realizes the appearance detection of the upper side of the stacked battery cell, and the barcode scanner realizes the identification of the identity of the stacked battery cell, with a high degree of functional integration, which is beneficial to improving the detection efficiency of the stacked battery cell;

[0032] 5) According to requirements, the wound battery cell tab defect detection device can be an additional device for the original battery cell production line of the battery cell manufacturer, with low cost and good adaptability;

[0033] 6) According to requirements, the wound battery cell tab defect detection device can also be used as an all-in-one machine for the battery cell production line supporting the battery cell manufacturer, which is easy to implement and has good flexibility. Description of the Drawings

[0034] Figure 1 is a schematic three-dimensional structure diagram of an existing stacked battery cell;

[0035] Figure 2 is a schematic three-dimensional structure diagram of the stacked battery cell tab defect detection device provided by the embodiment of the present application;

[0036] Figure 3 is Figure 2 a partial enlarged view of A in

[0037] Figure 4 is a top view schematic diagram of the stacked battery cell tab defect detection device provided by the embodiment of the present application;

[0038] Figure 5 is a side view schematic diagram of the stacked battery cell tab defect detection device provided by the embodiment of the present application;

[0039] Figure 6 is a schematic structural diagram of an implementation manner of the conveying mechanism of the stacked battery cell tab defect detection device provided by the embodiment of the present application;

[0040] Figure 7 is a schematic structural diagram of another implementation manner of the conveying mechanism of the wound battery cell tab defect detection device provided by the embodiment of the present application.

[0041] Figures 1 to 7 The following reference numerals are included:

[0042] Stacked cell 10: tab 11, end face 110, top face 111, bottom face 112, first side face 113, second side face 114;

[0043] Transport mechanism 20: detection station 21, first driving member 22, lifting member 23, positioning post 230, second driving member 24, limiting member 25, roller 26, first conveyor line 27, second conveyor line 28, transfer station 29;

[0044] Detection mechanism 30: first detection component 31, first camera 310, second camera 311, second detection component 32, base 320, third camera 321, bar light source 322, mounting bracket 323, barcode scanner 33;

[0045] Cell tooling 40. Detailed implementation

[0046] To make the technical problems solved by this application, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the embodiments of this application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of this application.

[0047] This application proposes a stacked cell tab defect detection device. Please refer to Figures 1 to 5 As shown, a tab 11 is provided at each end of the stacked cell 10 along its length direction. The tab 11 is an overall multi-layer square structure. The tab 11 includes an end face 110, a top face 111, a bottom face 112, a first side face 113, and a second side face 114. The stacked cell tab defect detection device includes a transport mechanism 20, a detection mechanism 30, and a processing unit (not shown in the figure). A detection station 21 is provided on the transport path of the transport mechanism 20. The transport mechanism 20 is configured to transport the stacked cell 10 to the detection station 21 along a first direction ( Figure 2 the X direction in Figure 2extends in the Y direction therein, and the first direction and the second direction are perpendicular; the detection mechanism 30 includes two groups of first detection components 31, the two groups of first detection components 31 are respectively arranged on both sides of the detection station 21 along the first direction, each group of first detection components 31 corresponds to a tab 11, and each group of first detection components 31 includes a first camera 310 and a second camera 311. The first camera 310 is configured to capture images of the end face 110 and the first side face 113 of the corresponding tab 11 and send the captured image information to the processing unit, and the second camera 311 is configured to capture images of the end face 110 and the second side face 114 of the corresponding tab 11 and send the captured image information to the processing unit; the processing unit is configured to process the image information sent by the first camera 310 and the second camera 311, and then judge whether there is a defect in the corresponding tab 11 according to the processing result.

[0048] The tab defect detection device for the stacked battery cell proposed in the embodiment of the present application realizes the synchronous detection of the two tabs 11 of the stacked battery cell 10 at the detection station 21 by setting two groups of first detection components 31, and the detection efficiency is high; at the same time, the first camera 310 and the second camera 311 of each group of first detection components 31 both capture a photo of an L-shaped surface of the corresponding tab 11, realizing the capture of the end face 110, the first side face 113 and the second side face 114 of the tab 11 of the stacked battery cell 10. The image is processed according to the image information of the three surfaces, and then it is judged whether there is a defect in the tab 11 of the stacked battery cell 10, improving the accuracy and precision of the tab defect detection of the stacked battery cell 10; moreover, the image information of the end face 110 is included in both of the two images captured by the first camera 310 and the second camera 311. Therefore, two pieces of feature information of the end face 110 of the tab 11 can be obtained, and the processing unit processes the images of the end face parts in the two images, further improving the accuracy and precision of the tab defect detection of the stacked battery cell.

[0049] As an implementation manner, the detection mechanism 30 further includes a second detection component 32. The second detection component 32 is arranged above the detection station 21, and the second detection component 32 is configured to perform an appearance detection on the upward-facing surface of the stacked battery cell 10 at the detection station 21.

[0050] By setting the second detection component 32, the appearance detection of the upward-facing surface of the stacked battery cell 10 is realized, so that the tab defect detection device for the stacked battery cell can perform the appearance detection on one large surface of the stacked battery cell 10 while performing the tab defect detection on the stacked battery cell 10, improving the detection efficiency of the stacked battery cell 10.

[0051] As an implementation manner, the second detection component 32 includes a base 320, at least one third camera 321, and two strip light sources 322. The base 320 is fixedly installed above the detection station 21. The third camera 321 is installed on the base 320. The shooting end of at least one third camera 321 faces downward and the shooting range covers the upward-facing side of the stacked battery cells 10 on the detection station 21. The two strip light sources 322 are arranged at intervals on both sides of the base 320. The strip light sources 322 extend along the second direction. The two strip light sources 322 are configured to illuminate the stacked battery cells 10 when the first camera 310, the second camera 311, and the third camera 321 take pictures.

[0052] Specifically, a frame (not shown in the figure) is fixedly installed above the detection station 21. The base 320, the first camera 310, and the second camera 311 are all fixedly installed on the frame.

[0053] Specifically, since the stacked battery cells 10 extend along the second direction, in order to ensure that the shooting range of the third camera 321 covers the stacked battery cells 10, two third cameras 321 are installed at intervals along the second direction on the base 320, and the installation height of the third camera 321 on the base 320 is adjustable.

[0054] Specifically, an installation frame 323 is installed on the base 320. The two strip light sources 322 are installed at intervals along the first direction on the installation frame 323. The installation angle of the strip light sources 322 on the installation frame 323 and the installation position along the first direction are adjustable.

[0055] Through the cooperation of the third camera 321 and the strip light sources 322, the shooting of the upward-facing side of the stacked battery cells 10 on the detection station 21 and the supplementary lighting of the stacked battery cells 10 when taking pictures are realized, providing a second detection component 32 with a simple structure and easy to implement. At the same time, the installation height of the third camera 321, the installation angle of the strip light sources 322, and the installation of the strip light sources 322 in the first direction are set to be adjustable, so that the third camera 321 is at a suitable shooting height and the strip light sources 322 are at suitable supplementary lighting positions, ensuring the shooting accuracy and good adaptability.

[0056] As an implementation manner, the detection mechanism 30 further includes a barcode scanner 33. The barcode scanner 33 is installed above the detection station 21. The barcode scanner 33 is configured to scan the identification code on the upward-facing side of the stacked battery cells 10 on the detection station 21 to identify the identity information of the stacked battery cells 10 on the detection station 21.

[0057] Specifically, the identification code can be either a two-dimensional code or a bar code.

[0058] By setting up the barcode scanner 33, the identification of the stacked battery cells 10 on the detection station 21 is realized, which facilitates the subsequent control of the detected stacked battery cells 10 according to the detection results.

[0059] Please refer to Figure 4 As shown, as an implementation manner, the stacked battery cell tab defect detection device further includes a plurality of battery cell fixtures 40, the battery cell fixtures 40 are configured to carry and position the stacked battery cells 10, and the conveying mechanism 20 is configured to carry and convey the battery cell fixtures 40 along a first direction to the detection station 21, so that the stacked battery cells 10 on the battery cell fixtures 40 are moved to the detection station 21.

[0060] By setting a plurality of battery cell fixtures 40, the automatic transfer and precise positioning of the stacked battery cells 10 in each process are realized, which is beneficial to improving the accuracy of visual inspection.

[0061] Please refer to Figures 3 to 5 As shown, as an implementation manner, a lifting assembly is provided at the detection station 21 on the conveying mechanism 20. The lifting assembly includes a first driving member 22 and a lifting member 23. The lifting member 23 is installed on the conveying mechanism 20 in a liftable manner and is located below the battery cell fixture 40; the fixed end of the first driving member 22 is installed on the conveying mechanism 20, the driving end of the first driving member 22 is connected to the lifting member 23, and the first driving member 22 is configured to drive the lifting member 23 to lift. The first driving member 22 drives the lifting member 23 to rise by a preset height to lift the battery cell fixture 40 at the detection station 21 to a suspended state.

[0062] Specifically, the first driving member 22 is any one of a cylinder, a synchronous belt type linear module or a ball screw type linear module.

[0063] Specifically, the lifting plate 23 is a horizontally arranged lifting plate. A plurality of positioning columns 230 are arranged at intervals on the lifting plate 23. A plurality of positioning holes are provided at the bottom of the battery cell fixture 40 in cooperation with the positioning columns 230. Each positioning column 230 corresponds to a positioning hole. After the first driving member 22 drives the lifting plate 23 to rise to the preset height, the positioning columns 230 are inserted into the corresponding positioning holes to realize the positioning of the battery cell fixture 40.

[0064] Through the cooperation of the first driving member 22 and the lifting member 23, the battery cell fixture 40 at the detection station 21 is lifted to a suspended state, which facilitates the two groups of second detection components 32 to take pictures of the corresponding tabs 11.

[0065] As an implementation manner, a set of limiting components are provided on both sides of the conveying mechanism 20 along the first direction at the detection station 21. The limiting components include a second driving member 24 and a limiting member 25. The limiting member 25 is rotatably mounted on the conveying mechanism 20. The driving end of the second driving member 24 is connected to the limiting member 25. The second driving member 24 is configured to drive the limiting member 25 to rotate so that the limiting member 25 switches to a limiting state or an avoidance state. The second driving members 24 of the two sets of limiting components drive the corresponding limiting members 25 to rotate upward to the limiting state, so as to respectively abut against both sides of the battery cell tooling 40 at the detection station 21 in the first direction, thereby positioning the battery cell tooling 40 at the detection station 21. The second driving members 24 of the two sets of limiting components drive the corresponding limiting members 25 to rotate downward to the avoidance state, so that the two limiting members 25 move below the bottom surface of the battery cell tooling 40, thereby avoiding the removal of the stacked battery cell 10 after detection from the detection station 21 and the entry of the next stacked battery cell 10 to be detected into the detection station 21.

[0066] Specifically, a roller 26 is rotatably mounted at the end of the limiting member 25, so that the contact between the limiting member 25 and the battery cell tooling 40 is a rolling contact, thereby reducing the wear on the battery cell tooling 40.

[0067] Specifically, the second driving member 24 is a flipping cylinder.

[0068] By providing two sets of limiting components, the battery cell tooling 40 is positioned at the detection station 21 through the limiting components, thereby improving the position accuracy of the stacked battery cell 10 at the detection station 21 and the detection accuracy of the stacked battery cell 10.

[0069] Please refer to Figure 2 and Figure 6 As shown, as an implementation manner, the conveying mechanism 20 is the first conveying line 27 of the battery cell production line of the battery cell manufacturer. The first conveying line 27 is configured to receive the stacked battery cell 10 from the previous process on the battery cell production line and convey the received stacked battery cell 10 to the detection station 21 along the first direction. The first conveying line 27 is also configured to convey the stacked battery cell 10 after the tab defect detection at the detection station 21 to the next process of the battery cell production line along the first direction.

[0070] By setting the conveying mechanism 20 as the first conveying line 27 of the battery cell production line of the battery cell manufacturer, a stacked battery cell tab defect detection device added to the original battery cell production line of the battery cell manufacturer is provided, which has good adaptability, low cost, and can meet the different production beat requirements of the production line.

[0071] Please refer to Figure 2 and Figure 7As shown, as an implementation manner, the conveying mechanism 20 is the second conveying line 28 on the first conveying line 27 that docks with the battery cell production line of the battery cell manufacturer. The first conveying line 27 is configured to receive the stacked battery cells 10 from the previous process on the battery cell production line and convey the received stacked battery cells 10 in the first direction to the transfer station 29. The second conveying line 28 is configured to receive the stacked battery cells 10 at the transfer station 29 and convey the received stacked battery cells 10 to the detection station 21 for ear tab defect detection. The second conveying line 28 is further configured to convey the stacked battery cells 10 after ear tab defect detection to the first conveying line 27. The first conveying line 27 is further configured to convey the received detected stacked battery cells 10 in the first direction to the next process of the battery cell production line.

[0072] Specifically, handling mechanisms are usually provided at the transfer station 29 and the discharge end of the second conveying line 28 to realize the transfer of the stacked battery cells 10 between the first conveying line 27 and the second conveying line 28.

[0073] Specifically, both the first conveying line 27 and the second conveying line 28 adopt step-type conveying lines.

[0074] By setting the conveying mechanism 20 as the second conveying line 28 on the first conveying line 27 that docks with the battery cell production line of the battery cell manufacturer, a device for detecting ear tab defects of stacked battery cells on the original battery cell production line of the battery cell manufacturer is provided, that is, the device for detecting ear tab defects of stacked battery cells is an all-in-one machine, which is easy to implement and has good flexibility.

[0075] Please refer to Figure 4 As shown, as an implementation manner, the first camera 310 and the second camera 311 are arranged at intervals in the first direction. The shooting ends of the first camera 310 and the second camera 311 both face the corresponding ear tabs 11. The included angle between the shooting ends of the first camera 310 and the second camera 311 and the second direction is 45°.

[0076] Through the settings of the first camera 310 and the second camera 311, the first camera 310 and the second camera 311 are in the most suitable shooting angles, thereby improving the accuracy and precision of detection.

[0077] The general working principle of the device for detecting ear tab defects of stacked battery cells proposed in the embodiment of the present application is as follows:

[0078] S1, the conveying mechanism 20 receives the stacked battery cells 10 to be tested and conveys the received stacked battery cells 10 to the detection station 21;

[0079] S2, the first cameras 310 and the second cameras 311 of the two groups of first detection components 31 take pictures of the corresponding tabs 11 to obtain two images of the corresponding tabs 11 and send the two obtained images to the processing unit. The first image includes the end face 110 and the first side face 113 of the corresponding tab 11, and the second image includes the end face 110 and the second side face 114 of the corresponding tab 11;

[0080] S3, the processing unit processes the two images of the corresponding tab 11 received, and judges whether there is a defect in the corresponding tab 11 according to the processing result. When the processing unit processes the two images of the corresponding tab 11, it includes performing image screening or image fusion processing on the end face parts in the two images of the corresponding tab 11;

[0081] S4, the conveying mechanism 20 conveys the detected stacked battery cells 10 to the next process.

[0082] Among them, the image screening in step S3 can be to compare with a standard image and select one of the images that is closest to the standard image; the image fusion can be to perform fusion processing on the end face parts in the two images to obtain a more accurate image of the end face part.

[0083] The above embodiments only illustrate the basic principles and characteristics of the present application. The present application is not limited by the above examples. Without departing from the spirit and scope of the present application, there are various changes and modifications to the present application, and these changes and modifications all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A lamination cell tab defect detection device, wherein a tab is provided at each of two ends of the lamination cell along its length direction, the tab is of a square structure as a whole, and the tab includes an end face, a top face, a bottom face, a first side face and a second side face, characterized in that, The laminated battery cell tab defect detection device includes a conveying mechanism, a detection mechanism, and a processing unit, where: A detection station is provided on the conveying path of the conveying mechanism. The conveying mechanism is configured to convey the laminated battery cell to the detection station in a first direction. The laminated battery cell at the detection station extends in a second direction, and the first direction and the second direction are perpendicular to each other. The detection mechanism includes two groups of first detection components. The two groups of first detection components are respectively arranged on both sides of the detection station along the first direction. Each group of first detection components corresponds to one tab. Each group of first detection components includes a first camera and a second camera. The first camera is configured to capture images of the end face and the first side face of the corresponding tab and send the captured image information to the processing unit. The second camera is configured to capture images of the end face and the second side face of the corresponding tab and send the captured image information to the processing unit. The processing unit is configured to process the image information sent by the first camera and the second camera, and then determine whether there are defects in the corresponding tab according to the processing result.

2. The tab defect detection device for the laminated battery cell according to claim 1, wherein The detection mechanism further includes a second detection component. The second detection component is arranged above the detection station. The second detection component is configured to perform an appearance detection on the upper surface of the laminated battery cell at the detection station.

3. The tab defect detection device for the stacked battery cell according to claim 2, wherein, The second detection component includes a base, at least one third camera, and two strip light sources, where: The base is fixedly installed above the detection station. The third camera is installed on the base. The shooting end of at least one third camera faces downward and the shooting range covers the upper surface of the laminated battery cell at the detection station. The two strip light sources are arranged at intervals on both sides of the base. The strip light sources extend along the second direction. The two strip light sources are configured to illuminate the laminated battery cell when the first camera, the second camera, and the third camera are shooting.

4. The tab defect detection device for the laminated battery cell according to claim 1, wherein The detection mechanism further includes a barcode scanner. The barcode scanner is installed above the detection station. The barcode scanner is configured to scan the identification code on the upper surface of the laminated battery cell at the detection station to identify the identity information of the laminated battery cell at the detection station.

5. The tab defect detection device for the laminated battery cell according to claim 1, wherein The laminated battery cell tab defect detection device further includes a number of battery cell fixtures. The battery cell fixtures are configured to carry and position the laminated battery cell. The conveying mechanism is configured to carry and convey the battery cell fixtures in the first direction to the detection station, so that the laminated battery cell on the battery cell fixtures is moved to the detection station.

6. The lamination cell tab defect detection device according to claim 5, characterized in that A lifting assembly is provided at the detection station on the conveying mechanism. The lifting assembly includes a first driving member and a lifting member, where: the lifting member is liftably installed on the conveying mechanism and is located below the battery cell tooling; the fixed end of the first driving member is installed on the conveying mechanism, the driving end of the first driving member is connected to the lifting member, the first driving member is configured to drive the lifting member to lift, and the first driving member drives the lifting member to rise by a preset height to lift the battery cell tooling at the detection station to a suspended state.

7. The lamination cell tab defect detection device according to claim 5, wherein A set of limiting assemblies are provided on both sides of the detection station of the conveying mechanism along the second direction. The limiting assemblies include second driving members and limiting members, where: the limiting members are rotatably installed on the conveying mechanism, the driving ends of the second driving members are connected to the limiting members, and the second driving members are configured to drive the limiting members to rotate so that the limiting members are switched to a limiting state or an avoidance state; The second driving members of the two sets of limiting assemblies drive the corresponding limiting members to rotate upward to the limiting state, so as to respectively abut against both sides of the battery cell tooling at the detection station in the first direction through the two limiting members, thereby positioning the battery cell tooling at the detection station; The second driving members of the two sets of limiting assemblies drive the corresponding limiting members to rotate downward to the avoidance state, so that the two limiting members move below the bottom surface of the battery cell tooling, thereby avoiding the removal of the stacked battery cells after detection from the detection station and the entry of the next stacked battery cell to be detected into the detection station.

8. The lamination cell tab defect detection device according to claim 1, characterized in that, The conveying mechanism is the first conveyor line of the battery cell production line of the battery cell manufacturer. The first conveyor line is configured to receive the stacked battery cells of the previous process on the battery cell production line and convey the received stacked battery cells along the first direction to the detection station. The first conveyor line is also configured to convey the stacked battery cells after the ear defect detection at the detection station along the first direction to the next process of the battery cell production line; Alternatively, the conveying mechanism is the second conveyor line on the first conveyor line that docks with the battery cell production line of the battery cell manufacturer. The first conveyor line is configured to receive the stacked battery cells of the previous process on the battery cell production line and convey the received stacked battery cells along the first direction to the transfer station. The second conveyor line is configured to receive the stacked battery cells at the transfer station and convey the received stacked battery cells to the detection station for ear defect detection. The second conveyor line is also configured to convey the stacked battery cells after the ear defect detection to the first conveyor line, and the first conveyor line is also configured to convey the received and detected stacked battery cells along the first direction to the next process of the battery cell production line.

9. The tab defect detection device for the laminated battery cell according to claim 1, wherein, The first camera and the second camera are arranged at intervals along the first direction. The shooting ends of the first camera and the second camera both face the corresponding ears, and the included angle between the shooting ends of the first camera and the second camera and the second direction is 45°.

10. A method for detecting the defects of the tabs of a laminated battery cell, characterized in that, The method for detecting the defects of the tabs of the laminated battery cells is implemented by the device for detecting the defects of the tabs of the laminated battery cells according to any one of claims 1-9, and includes the following steps: The conveying mechanism receives the laminated battery cells to be tested and conveys the received laminated battery cells to the detection station; The first cameras and the second cameras of the two groups of first detection components take pictures of the corresponding tabs to obtain two images of the corresponding tabs and send the two obtained images to the processing unit. The first image includes the end face and the first side face of the corresponding tab, and the second image includes the end face and the second side face of the corresponding tab; The processing unit processes the two images of the corresponding tab received, and judges whether there are defects in the corresponding tab according to the processing result. When the processing unit processes the two images of the corresponding tab, it includes performing image screening or image fusion processing on the end face parts in the two images of the corresponding tab.

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