Detection device and detection method

Abstract

The present disclosure relates to the technical field of battery detection, and particularly relates to a detection device and a detection method. The detection device provided by the present disclosure comprises an image acquisition device, which comprises a first image acquisition unit, a second image acquisition unit, a third image acquisition unit, a fourth image acquisition unit and a fifth image acquisition unit. The five faces and details of the end plate of the battery module can be detected in one detection station, a plurality of defect items can be quickly detected in each face and fine structure, the situation of missed detection is avoided, the labor cost is saved, and the detection efficiency can be effectively improved.

Description

Technical Field

[0001] This disclosure relates to the field of battery testing technology, and in particular to a testing device and testing method. Background Technology

[0002] Power battery modules have a certain size and weight, and in terms of appearance, they include multiple exterior surfaces. When conducting appearance inspection, each surface needs to be inspected.

[0003] Currently, the visual inspection of power battery modules is still mainly done manually. The battery module includes end plates, which include the top surface, bottom surface, first side surface, second side surface, and end face. Manually inspecting the appearance of each surface of the end plate is labor-intensive. In addition, the multiple surfaces of the power battery module are made of different materials and have different surface treatments, and contain many fine structures. During the inspection process, multiple defects need to be quickly inspected in each surface and fine structure, which places high demands on the inspectors and is prone to missed defects. Summary of the Invention

[0004] This disclosure provides a detection device and a detection method to at least solve the above-mentioned technical problems existing in the prior art.

[0005] The first aspect of this disclosure provides a detection device, comprising: an image acquisition device, the image acquisition device including a first image acquisition unit, a second image acquisition unit, a third image acquisition unit, a fourth image acquisition unit and a fifth image acquisition unit; The first image acquisition unit and the second image acquisition unit are respectively located on both sides of the first detection station. The first image acquisition unit is used to obtain the first image information of the side of the first end plate of the battery module and transmit the first image information to the MES system. The second image acquisition unit is used to obtain the first image information of the side of the second end plate of the battery module and transmit the first image information to the MES system. The third image acquisition unit and the fourth image acquisition unit are arranged vertically and located at the top and bottom of the first detection station, respectively. The third image acquisition unit is used to obtain the second image information of the top surface of the end plate of the battery module and transmit the second image information to the MES system. The fourth image acquisition unit is used to obtain the second image information of the bottom surface of the end plate of the battery module and transmit the second image information to the MES system. The fifth image acquisition unit is located at one end of the first detection station and is used to obtain third image information of the end plate face of the battery module and transmit the third image information to the MES system.

[0006] Furthermore, at least one of the first image acquisition unit, the second image acquisition unit, the third image acquisition unit, the fourth image acquisition unit, and the fifth image acquisition unit includes a first moving unit, a second moving unit, a third moving unit, and a camera assembly; The first moving unit extends along a first direction, and the second moving unit is movably disposed on the first moving unit so that the second moving unit moves along the first direction; The second moving unit extends along the second direction, and the third moving unit is movably disposed on the second moving unit so that the third moving unit moves along the second direction; The third moving unit extends along a third direction, and the camera assembly is movably disposed on the third moving unit so that the camera assembly can move along the third direction; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0007] Furthermore, it also includes a rotating mechanism for driving the battery module to rotate in the plane containing the bottom surface of the end plate.

[0008] Furthermore, it also includes a fourth image acquisition unit, which is located on one side of the second inspection station and is used to obtain fourth image information of the battery side, battery top, or battery bottom of the battery module, and transmit the fourth image information to the MES system.

[0009] Furthermore, it also includes a robotic arm, which is used to clamp the battery module to the first inspection station or the second inspection station; The robotic arm includes a rotating gripper, which drives the battery module to rotate in the plane containing the end face of the end plate.

[0010] Furthermore, it also includes a conveying mechanism, which is located beside the image acquisition device and is used to drive the battery module through the image acquisition device.

[0011] Furthermore, the number of image acquisition devices is two; The two image acquisition devices are located on the same side of the conveying direction of the conveying mechanism; or, the two image acquisition devices are located opposite each other and respectively located on both sides of the conveying direction of the conveying mechanism.

[0012] Furthermore, the number of image acquisition devices is three, with two image acquisition devices located on one side of the conveying direction of the conveying mechanism and the other image acquisition device located on the other side of the conveying direction of the conveying mechanism.

[0013] Furthermore, the conveying mechanism includes a lifting mechanism for lifting the battery module.

[0014] The second aspect of this disclosure provides a testing method using the testing device described in the first aspect, comprising: a conveying mechanism conveying a battery module into place, and a robotic arm grasping the battery module and placing it at a first testing station; The first image acquisition unit and the second image acquisition unit respectively detect the first end plate side surface and the second end plate side surface of the first end plate of the battery module; the third image acquisition unit and the fourth image acquisition unit respectively detect the top surface and the bottom surface of the first end plate; the fifth image acquisition unit detects the end plate end surface of the first end plate; The rotating mechanism drives the battery module to rotate 180° in the plane where the bottom surface of the end plate is located; The first image acquisition unit and the second image acquisition unit respectively detect the first end plate side and the second end plate side of the second end plate of the battery module; the third image acquisition unit and the fourth image acquisition unit respectively detect the top surface and the bottom surface of the end plate of the second end plate; the fifth image acquisition unit detects the end plate end face of the second end plate; The robotic arm picks up the battery module and moves it to the second inspection station; The sixth image acquisition unit detects the first battery side surface of the battery module; the rotating gripper drives the battery module to rotate 90° in the plane where the end plate end face is located, and the sixth image acquisition unit detects the top surface of the battery module; the rotating gripper drives the battery module to rotate 90° in the plane where the end plate end face is located, and the sixth image acquisition unit detects the second battery side surface of the battery module; the rotating gripper drives the battery module to rotate 90° in the plane where the end plate end face is located, and the sixth image acquisition unit detects the bottom surface of the battery module. The robotic arm places the battery module back into the conveying mechanism.

[0015] The technical solution provided in this disclosure has the following advantages compared with the prior art: The detection device provided in this embodiment includes an image acquisition device, which comprises a first image acquisition unit, a second image acquisition unit, a third image acquisition unit, a fourth image acquisition unit, and a fifth image acquisition unit. The first and second image acquisition units are respectively located on both sides of a first detection station. The first image acquisition unit is used to obtain first image information of the side of the first endplate of the battery module and transmit the first image information to the MES system. The second image acquisition unit is used to obtain first image information of the side of the second endplate of the battery module and transmit the first image information to the MES system. The detection of the two side plates of an endplate is completed by the first and second image acquisition units. The third and fourth image acquisition units are arranged vertically and are located at the top and bottom of the first detection station, respectively. The third image acquisition unit is used to obtain second image information of the top surface of the endplate of the battery module and transmit the second image information to the MES system. The fourth image acquisition unit is used to obtain second image information of the bottom surface of the endplate of the battery module and transmit the second image information to the MES system. The detection of the top and bottom surfaces of an endplate is completed by the third and fourth image acquisition units. The fifth image acquisition unit is located at one end of the first inspection station and is used to acquire third image information of the end plate face of the battery module and transmit the third image information to the MES system. The fifth image acquisition unit completes the inspection of the end plate face of one end plate. This embodiment of the present disclosure uses an image acquisition device to complete the inspection of five faces and details of the battery module's end plate at one inspection station. Multiple defects can be quickly inspected in each face and fine structure, avoiding missed inspections, saving labor costs, and effectively improving inspection efficiency.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0017] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 A schematic diagram of the battery module structure is shown; Figure 2 A schematic diagram of the structure of the detection device provided in an embodiment of this disclosure is shown; Figure 3A schematic diagram of the structure of the image acquisition device in the detection apparatus provided in this embodiment is shown; Figure 4 A schematic diagram of the structure of the sixth image acquisition unit in the detection device provided in this embodiment is shown; Figure 5 A schematic diagram of the structure of the first image acquisition unit in the detection device provided in this embodiment is shown.

[0019] The following are the labeling instructions in the diagram: 1. Battery module; 11. Battery bottom surface; 12. Battery top surface; 13. Battery side surface; 14. First end plate; 141. End plate top surface; 142. End plate bottom surface; 143. End plate side surface; 144. End plate end surface; 15. Second end plate; 2. Frame; 21. First image acquisition unit; 211. Area scan camera; 22. Second image acquisition unit; 23. Third image acquisition unit; 24. Fourth image acquisition unit; 25. Fifth image acquisition unit; 26. Sixth image acquisition unit; 261. Line scan camera; 262. 3D camera; 263. Line scan camera; 3. Robot arm; 4. Conveying mechanism; 51. First inspection station; 52. Second inspection station; 6. Rotation mechanism; 71. X-axis; 72. Y-axis; 73. Z-axis. Detailed Implementation

[0020] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] like Figure 1 As shown, the battery module 1 includes a battery bottom surface 11, a battery top surface 12, and two battery side surfaces 13, and two end plates (a first end plate 14 and a second end plate 15). Taking the first end plate 14 as an example, the end plate includes an end plate top surface 141, an end plate bottom surface 142, an end plate end surface 144, and two end plate side surfaces 143, which are the first end plate side surface and the second end plate side surface, respectively.

[0022] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the detection device provided in this embodiment includes an image acquisition device, which is mounted on a rack 2. The image acquisition device includes a first image acquisition unit 21, a second image acquisition unit 22, a third image acquisition unit 23, a fourth image acquisition unit 24, and a fifth image acquisition unit 25. All of these units can be mounted on the rack 2.

[0023] The first image acquisition unit 21 and the second image acquisition unit 22 are located on both sides of the first detection station 51. The first image acquisition unit 21 is used to obtain the first image information of the side of the first end plate of the battery module 1 and transmit the first image information to the MES system. The second image acquisition unit 22 is used to obtain the first image information of the side of the second end plate of the battery module 1 and transmit the first image information to the MES system. The detection of the two end plate sides of one end plate is completed by the first image acquisition unit 21 and the second image acquisition unit 22.

[0024] The third image acquisition unit 23 and the fourth image acquisition unit 24 are arranged vertically, and are located at the top and bottom of the first detection station 51, respectively. The third image acquisition unit 23 is used to obtain the second image information of the top surface 141 of the end plate of the battery module 1 and transmit the second image information to the MES system. The fourth image acquisition unit 24 is used to obtain the second image information of the bottom surface 142 of the end plate of the battery module 1 and transmit the second image information to the MES system. The detection of the top surface 141 and the bottom surface 142 of the end plate of one end plate is completed through the third image acquisition unit 23 and the fourth image acquisition unit 24.

[0025] The fifth image acquisition unit 25 is located at one end of the first detection station 51 and is used to obtain the third image information of the end plate end face 144 of the battery module 1 and transmit the third image information to the MES system; the detection of the end plate end face 144 of an end plate is completed through the fifth image acquisition unit 25.

[0026] This embodiment of the invention uses an image acquisition device to complete the inspection of five sides and details of the end plate of the battery module 1 at one inspection station. It can quickly inspect multiple defects in each side and fine structure, avoid missed inspections, save labor costs, and effectively improve inspection efficiency.

[0027] The detection device provided in this embodiment can simultaneously acquire surface images of all sides of the battery module's end plate by setting a first image acquisition unit, a second image acquisition unit, a third image acquisition unit, a fourth image acquisition unit, and a fifth image acquisition unit at different positions. This facilitates comprehensive detection of the surface quality of the battery module's end plate and improves detection efficiency. The independent imaging by each image acquisition unit further reduces the time the target workpiece spends at the first detection station 51 to meet imaging requirements, thereby enabling faster detection speeds, shortening the detection time, and improving production efficiency.

[0028] The first image acquisition unit 21, the second image acquisition unit 22, the third image acquisition unit 23, the fourth image acquisition unit 24, and the fifth image acquisition unit 25 can all be shooting modules of the area array camera 211.

[0029] The first image acquisition unit 21 and the second image acquisition unit 22 both include area scan cameras 211; the third image acquisition unit 23 and the fourth image acquisition unit 24 both include area scan cameras 211; the fifth image acquisition unit 25 includes an end-face large-field-of-view camera module and an end-face small-field-of-view camera module. By taking pictures with the end-face large-field-of-view camera module and the end-face small-field-of-view camera module respectively, full-range detection of the top surface and the side surface of the battery module end plate can be achieved, thereby enabling a more comprehensive and accurate judgment of the battery module's defects and improving the accuracy of detection.

[0030] In some specific embodiments, at least one of the first image acquisition unit 21, the second image acquisition unit 22, the third image acquisition unit 23, the fourth image acquisition unit 24, and the fifth image acquisition unit 25 includes a first moving unit, a second moving unit, a third moving unit, and a camera assembly; the first moving unit, the second moving unit, and the third moving unit can form a three-axis moving module, so that the camera assembly can be adjusted up and down, forward and backward, or left and right under the drive of the first moving unit, the second moving unit, and the third moving unit.

[0031] The first moving unit extends along a first direction, and the second moving unit is movably disposed on the first moving unit so that the second moving unit moves along the first direction; the second moving unit extends along a second direction, and the third moving unit is movably disposed on the second moving unit so that the third moving unit moves along the second direction; the third moving unit extends along a third direction, and the camera assembly is movably disposed on the third moving unit so that the camera assembly moves along the third direction; wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0032] The first, second, and third directions can be the X-axis 71, Y-axis 72, and Z-axis 73 of the frame 2, respectively, thereby allowing the camera assembly to be adjusted up and down, forward and backward, or left and right.

[0033] In some specific embodiments, a rotating mechanism 6 is also included. The rotating mechanism 6 is disposed on the frame 2 and is used to drive the battery module 1 to rotate in the plane where the bottom surface 142 of the end plate is located. After the five sides and details of the first end plate 14 of the battery module 1 are inspected, the rotating mechanism 6 drives the battery module 1 to rotate 180°, which can complete the inspection of the second end plate 15 of the battery module 1. This saves labor costs and the investment cost of an image acquisition device, and can effectively improve the inspection efficiency.

[0034] The rotating mechanism 6 may include a motor and a platform. The motor is mounted on the frame 2, and the platform is rotatably mounted on the frame 2. The output end of the motor is connected to the platform to drive the platform to rotate in a plane. Optionally, the platform is fixed to a rotating shaft, which is equipped with a driven gear. The output end of the motor is connected to a driving gear, and the driving gear meshes with the driven gear, thereby enabling the motor to drive the platform to rotate.

[0035] In some specific embodiments, the image acquisition device further includes a sixth image acquisition unit 26, which is disposed on one side of the second inspection station 52. The sixth image acquisition unit 26 is used to acquire fourth image information of the battery side surface 13, battery top surface 12, or battery bottom surface 11 of the battery module 1, and transmit the fourth image information to the MES system. The sixth image acquisition unit 26 can be used to complete the inspection of the battery side surface 13.

[0036] The sixth image acquisition unit 26 may include a line scan camera 261, a 3D camera 262, or a line scan camera 263. By taking pictures with the line scan camera 261, the 3D camera 262, or the line scan camera 263, a full-range inspection of the top surface and side surface of the battery module end plate can be achieved, thereby enabling a more comprehensive and accurate judgment on the defects of the battery module and improving the accuracy of the inspection.

[0037] The sixth image acquisition unit 26 includes a three-axis moving module. A line scan camera 261, a 3D camera 262, or a line scan camera 263 is mounted on the three-axis moving module, so that the line scan camera 261, the 3D camera 262, or the line scan camera 263 can be adjusted up and down, forward and backward, or left and right under the drive of the three-axis moving module.

[0038] In some specific embodiments, a robotic arm 3 is also included. The robotic arm 3 is used to clamp the battery module 1 to the first inspection station 51 or the second inspection station 52. The robotic arm 3 can also return the inspected battery module 1 to the conveying device. In this embodiment, the second inspection station 52 is located above the first inspection station 51. After the robotic arm 3 picks up the battery module 1 located at the first inspection station 51, it can be moved to the second inspection station 52.

[0039] The robotic arm 3 includes a rotating gripper, which drives the battery module 1 to rotate within the plane of the end plate face 144. After the sixth image acquisition unit 26 has finished detecting one side 13 of the battery module 1, the rotating gripper can rotate the battery module 1 by 90°. At this time, the top surface 12 or bottom surface 11 of the battery module 1 is opposite to the sixth image acquisition unit 26, thus completing the detection of the top surface 12 or bottom surface 11. Then, the rotating gripper can rotate the battery module 1 by another 90°, and the sixth image acquisition unit 26 completes the detection of the other side 13 of the battery module 1. Then, the rotating gripper can rotate the battery module 1 by another 90°, at which point the bottom surface 11 or top surface 12 of the battery module 1 is opposite to the sixth image acquisition unit 26, thus completing the detection of the bottom surface 11 or top surface 12.

[0040] In some specific embodiments, a conveying mechanism 4 is also included, which can transport the battery module 1 along a set direction. The conveying mechanism 4 is located next to the image acquisition device and is used to drive the battery module 1 through the image acquisition device. The battery module 1 to be tested can be transported to the first testing station 51 by the conveying mechanism 4. After the robot arm 3 picks up the battery module 1, it can be placed in the first testing station 51 for testing. After the first testing station 51 completes the testing of each side of the battery end plate, the robot arm 3 picks up the battery module 1 and lifts it into the second testing station 52. After the second testing station 52 completes the testing of the top surface 12, bottom surface 11, and two side surfaces 13 of the battery, the robot arm 3 puts the battery module 1 back into the conveying equipment.

[0041] The conveying mechanism 4 can be a multi-dimensional moving mechanism with two or more dimensions.

[0042] In some specific embodiments, the number of image acquisition devices is two; the two image acquisition devices are arranged on the same side of the conveying direction of the conveying mechanism 4; or, the two image acquisition devices are arranged opposite each other and respectively on both sides of the conveying direction of the conveying mechanism 4. This embodiment can improve detection efficiency and shorten the total detection time by arranging two image acquisition devices.

[0043] Optionally, two battery modules 1 can be placed on the vehicle carrying the battery module 1, with two image acquisition devices corresponding one-to-one with the two battery modules 1.

[0044] In some specific embodiments, the number of image acquisition devices is three: two image acquisition devices are located on one side of the conveying direction of the conveying mechanism 4, and the other image acquisition device is located on the other side of the conveying direction of the conveying mechanism 4. This embodiment, by arranging four image acquisition devices, can improve detection efficiency and shorten the total detection time.

[0045] In some specific embodiments, the conveying mechanism 4 includes a lifting mechanism, which can be installed on the frame 2. The lifting mechanism can extend and retract along the height direction. The lifting mechanism is used to lift the carrier carrying the battery module 1. The carrier is unlocked when it is lifted to a set position, and the battery module 1 located on the carrier is released.

[0046] The lifting mechanism may include a lifting cylinder. After the conveying mechanism 4 delivers the carrier to the designated position, the stop cylinder blocks the carrier. After the production line PLC detects that the carrier has arrived, the lifting cylinder lifts the carrier so that it is separated from the conveying mechanism 4. The carrier is unlocked, and the robot arm 3 grabs the battery module 1 to the first inspection station 51. After all the battery modules 1 on the carrier have been inspected, the lifting cylinder descends, and the carrier is lowered onto the double-speed chain of the conveying mechanism 4. The production line PLC allows the carrier to flow out.

[0047] The detection method provided in this embodiment uses the detection device provided in this embodiment. The detection method includes: the conveying mechanism 4 conveys the battery module 1 to the position, and the robotic arm 3 grabs the battery module 1 and places it in the first detection station 51. The first image acquisition unit 21 and the second image acquisition unit 22 respectively detect the first end plate side and the second end plate side of the first end plate 14 of the battery module 1; the third image acquisition unit 23 and the fourth image acquisition unit 24 respectively detect the end plate top surface 141 and the end plate bottom surface 142 of the first end plate 14; the fifth image acquisition unit 25 detects the end plate end surface 144 of the first end plate 14. The rotating mechanism 6 drives the battery module 1 to rotate 180° in the plane where the bottom surface 142 of the end plate is located; The first image acquisition unit 21 and the second image acquisition unit 22 respectively detect the first end plate side and the second end plate side of the second end plate 15 of the battery module 1; the third image acquisition unit 23 and the fourth image acquisition unit 24 respectively detect the top surface 141 and the bottom surface 142 of the end plate of the second end plate 15; the fifth image acquisition unit 25 detects the end plate end face 144 of the second end plate 15. Robotic arm 3 picks up battery module 1 and moves it to the second inspection station 52; The sixth image acquisition unit 26 detects the first battery side surface 13 of the battery module 1; the rotating gripper drives the battery module 1 to rotate 90° in the plane where the end plate end face 144 is located; the sixth image acquisition unit 26 detects the top surface 12 of the battery module 1; the rotating gripper drives the battery module 1 to rotate 90° in the plane where the end plate end face 144 is located; the sixth image acquisition unit 26 detects the second battery side surface 13 of the battery module 1; the rotating gripper drives the battery module 1 to rotate 90° in the plane where the end plate end face 144 is located; the sixth image acquisition unit 26 detects the bottom surface 11 of the battery module 1. The robotic arm 3 places the battery module 1 back into the conveying mechanism 4.

[0048] The detection method provided in this embodiment can detect the bottom surface 11, top surface 12, and two side surfaces 13 (four major surfaces) of the battery, as well as the top surface 141, bottom surface 142, first side surface, second side surface, and end surface 144 of the two end plates. Using the detection device provided in this embodiment, the five surfaces and details of the two end plates of the battery module 1 and the four major surfaces of the battery can be detected at two detection stations. Multiple defects can be quickly inspected in each surface and fine structure, avoiding missed detections, saving labor costs, and effectively improving detection efficiency.

[0049] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A detection device, characterized in that, include: Image acquisition device, robotic arm (3), conveying mechanism (4) and rotating mechanism (6); The image acquisition device includes a first image acquisition unit (21), a second image acquisition unit (22), a third image acquisition unit (23), a fourth image acquisition unit (24), and a fifth image acquisition unit (25), all of which are mounted on a frame (2). The first image acquisition unit (21) and the second image acquisition unit (22) are located on both sides of the first detection station (51). The first image acquisition unit (21) is used to obtain the first image information of the side of the first end plate of the battery module (1) and transmit the first image information to the MES system. The second image acquisition unit (22) is used to obtain the first image information of the side of the second end plate of the battery module (1) and transmit the first image information to the MES system. The third image acquisition unit (23) and the fourth image acquisition unit (24) are arranged vertically and located at the top and bottom of the first detection station (51), respectively. The third image acquisition unit (23) is used to obtain the second image information of the top surface (141) of the end plate of the battery module (1) and transmit the second image information to the MES system. The fourth image acquisition unit (24) is used to obtain the second image information of the bottom surface (142) of the end plate of the battery module (1) and transmit the second image information to the MES system. The fifth image acquisition unit (25) is located at one end of the first detection station (51) and is used to obtain the third image information of the end plate end face (144) of the battery module (1) and transmit the third image information to the MES system. It also includes a sixth image acquisition unit (26), which is located on one side of the second detection station (52) and is used to obtain fourth image information of the battery side (13), battery top (12) or battery bottom (11) of the battery module (1) and transmit the fourth image information to the MES system. The first image acquisition unit (21), the second image acquisition unit (22), the third image acquisition unit (23), the fourth image acquisition unit (24), and the fifth image acquisition unit (25) each include a first moving unit, a second moving unit, a third moving unit, and a camera assembly; The first moving unit, the second moving unit, and the third moving unit form a three-axis moving module, enabling the camera assembly to be adjusted up and down, forward and backward, or left and right under the drive of the first moving unit, the second moving unit, and the third moving unit. The robotic arm (3) is used to clamp the battery module (1) to the first inspection station (51) or the second inspection station (52), wherein the robotic arm (3) includes a rotating gripper, which is used to drive the battery module (1) to rotate in the plane where the end plate end face (144) is located; The conveying mechanism (4) is located beside the image acquisition device and is used to drive the battery module (1) through the image acquisition device. The conveying mechanism (4) includes a lifting mechanism, which is located on the frame (2). The lifting mechanism can extend and retract along the height direction. The lifting mechanism is used to lift the carrier carrying the battery module (1). The carrier is unlocked when it is lifted to a preset position, and the battery module (1) located on the carrier is released. The rotating mechanism (6) is mounted on the frame (2). The rotating mechanism (6) is used to drive the battery module (1) to rotate in the plane where the bottom surface (142) of the end plate is located. After the five sides and details of the first end plate (14) of the battery module (1) are inspected, the rotating mechanism (6) drives the battery module (1) to rotate 180° to complete the inspection of the second end plate (15) of the battery module (1).

2. The detection device according to claim 1, characterized in that, The number of image acquisition devices is two; The two image acquisition devices are arranged on the same side of the conveying direction of the conveying mechanism (4); or, the two image acquisition devices are arranged opposite each other and respectively on both sides of the conveying direction of the conveying mechanism (4).

3. The detection device according to claim 1, characterized in that, The number of image acquisition devices is three, with two image acquisition devices located on one side of the conveying direction of the conveying mechanism (4) and the other image acquisition device located on the other side of the conveying direction of the conveying mechanism (4).

4. A detection method, using the detection apparatus according to any one of claims 1 to 3, characterized in that, include: The conveying mechanism (4) delivers the battery module (1) to the position, and the robot (3) grabs the battery module (1) and places it in the first inspection station (51); The first image acquisition unit (21) and the second image acquisition unit (22) respectively detect the first end plate side and the second end plate side of the first end plate (14) of the battery module (1); the third image acquisition unit (23) and the fourth image acquisition unit (24) respectively detect the end plate top surface (141) and the end plate bottom surface (142) of the first end plate (14); the fifth image acquisition unit (25) detects the end plate end face (144) of the first end plate (14); The rotating mechanism (6) drives the battery module (1) to rotate 180° in the plane where the bottom surface (142) of the end plate is located; The first image acquisition unit (21) and the second image acquisition unit (22) respectively detect the first end plate side and the second end plate side of the second end plate (15) of the battery module (1); the third image acquisition unit (23) and the fourth image acquisition unit (24) respectively detect the top surface (141) and the bottom surface (142) of the end plate of the second end plate (15); the fifth image acquisition unit (25) detects the end plate end face (144) of the second end plate (15); The robotic arm (3) picks up the battery module (1) and moves it to the second inspection station (52); The sixth image acquisition unit (26) detects the first battery side surface (13) of the battery module (1); the rotating gripper drives the battery module (1) to rotate 90° in the plane where the end plate end face (144) is located, and the sixth image acquisition unit (26) detects the top surface (12) of the battery module (1); the rotating gripper drives the battery module (1) to rotate 90° in the plane where the end plate end face (144) is located, and the sixth image acquisition unit (26) detects the second battery side surface (13) of the battery module (1); the rotating gripper drives the battery module (1) to rotate 90° in the plane where the end plate end face (144) is located, and the sixth image acquisition unit (26) detects the bottom surface (11) of the battery module (1); The robotic arm (3) places the battery module (1) back into the conveying mechanism (4).

Images