Post-welding detection equipment for sealing nail of power battery

Abstract

The utility model discloses power battery sealing nail post-welding detection equipment which comprises a support A and a support B fixedly connected to the outer wall of one side of the support A. The top face of the support A is inclined, and a conveying belt mechanism is arranged on the top face of the support A; the support B is composed of a platform and discharging tables distributed on the two sides of the platform. A guide plate is rotationally connected to the outer wall of the top of the platform, and the bottom surface of the guide plate is connected with the output end of a motor I fixedly connected to the inner wall of the bottom of the bracket B through a connecting shaft; one side surface of the bracket A is fixedly connected with two contact sensors; two photoelectric counting sensors are fixedly connected to one side face of the support B located at the bottom ends of the two discharging tables. The conveying belt mechanism comprises two rolling wheels rotationally connected to the corresponding side faces of the support A. According to the utility model, qualified batteries and unqualified batteries can be guided and distinguished, so that the qualified batteries and the unqualified batteries can be automatically classified and stored, and the use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a testing device for the post-welding of sealing nails in power batteries. Background Technology

[0002] With the continued shortage of fossil fuel supply and the increasingly serious environmental problems caused by fossil fuels, new energy vehicles with energy-saving and emission-reduction effects are constantly emerging in order to reduce carbon emissions. One of the key technologies of new energy vehicles is the power battery. Currently, power batteries can be divided into three types according to their packaging: pouch batteries, cylindrical batteries, and prismatic batteries. The production process of prismatic batteries requires a sealing nail welding step. Due to defects such as burst points, pinholes, incomplete welds, and broken welds in the sealing nail welding, electrolyte leakage inside the cell can occur, resulting in substandard power battery quality. This can lead to huge safety hazards such as spontaneous combustion and explosion in new energy vehicles. Therefore, the inspection after sealing nail welding is very important.

[0003] A search revealed a Chinese patent application with patent number CN202210126497.6, which discloses a battery sealing nail assembly detection device. The device includes a light source assembly, a mechanical cantilever, and an image acquisition device. It detects the actual assembly status of the sealing nail by analyzing the imaging step difference of a linear laser pointer at the feature of the sealing nail, which changes the current situation where the existing technology can only detect the relative position of the sealing nail and the injection port.

[0004] However, the battery sealing nail assembly detection device in the above patent has the following shortcomings: it cannot automatically distinguish between qualified and unqualified battery products after detection, which means that manual removal and classification are required after each detection, making it inconvenient to use. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a post-weld testing device for power battery sealing nails.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A power battery sealing nail welding post-testing device includes a bracket A and a bracket B fixedly connected to the outer wall of one side of the bracket A. The top surface of the bracket A is inclined and a conveyor belt mechanism is provided on the top surface of the bracket A.

[0008] The support B consists of a platform and unloading platforms distributed on both sides of the platform; a guide plate is rotatably connected to the top outer wall of the platform, and the bottom surface of the guide plate is connected to an output end of a motor fixedly connected to the bottom inner wall of the support B via a connecting shaft.

[0009] Two contact sensors are fixedly connected to one side of the bracket A.

[0010] As a further improvement of this utility model, two photoelectric counting sensors are fixedly connected to one side of the bracket B located at the bottom of the two unloading platforms.

[0011] As a further embodiment of this utility model: the conveyor belt mechanism includes two rollers rotatably connected to one side of the support A, a conveyor belt sleeved on the outer wall of the two rollers, and a second motor fixedly connected to one side of the support A through a support plate, wherein the output end of the second motor is connected to one end of one of the rollers through a coupling.

[0012] As a further embodiment of this utility model: the top surface of the bracket A is provided with an anti-tipping structure, which includes two supports fixedly connected to the top surface of the bracket A, a plurality of I-beams inserted at equal intervals into the inner wall of the supports, springs sleeved on the outer circumference of the I-beams, and ball bearings rollingly connected to the inner wall of one end of the I-beams, with the two ends of the springs respectively fixedly connected to the corresponding side of the I-beams and the supports.

[0013] As a further improvement of this utility model: the top surfaces of the two supports are fixedly connected to the same support frame, and a control panel is fixedly connected to one outer wall of the support frame.

[0014] As a further embodiment of this utility model: the top inner wall of the support frame is provided with an electric slide rail, the inner wall of the electric slide rail is slidably connected with a moving block, and the bottom outer wall of the moving block is fixedly connected with a detection camera.

[0015] As a further improvement of this utility model: a planar shadowless light source is fixedly connected to one side of the support frame located below the electric slide rail.

[0016] As a further improvement of this utility model: a light curtain sensor is fixedly connected to one side of the support frame. The light curtain sensor consists of an infrared receiver and an infrared transmitter arranged in relative positions.

[0017] Compared with the prior art, this utility model provides a post-weld testing device for power battery sealing nails, which has the following beneficial effects:

[0018] 1. This power battery sealing nail welding post-inspection equipment, through the setting of a guide plate and other structures, when a defective product is detected, the vision analysis module transmits a signal to the PLC control module, so that the control motor starts and drives the guide plate to rotate. When one end of the guide plate contacts one of the contact sensors (as shown on the right), the contact sensor transmits a signal to the PLC control module, and the control motor stops operating, so that the unqualified battery conveyed by the conveyor belt mechanism slides to the platform and the left unloading platform, and moves out along the left unloading platform. Conversely, when a qualified product is detected, the vision analysis module transmits a signal to the PLC control module, so that the control motor starts and drives the guide plate to rotate in the opposite direction. When the other end of the guide plate contacts another contact sensor (as shown on the left), the contact sensor transmits a signal to the PLC control module, and the control motor stops operating, so that the qualified battery conveyed by the conveyor belt mechanism slides to the platform and the right unloading platform, and moves out along the right unloading platform. It can guide and distinguish between qualified and unqualified batteries, so as to automatically classify and collect qualified and unqualified batteries, which is convenient to use.

[0019] 2. This power battery sealing nail welding post-testing equipment, by setting up an anti-tipping structure, places the battery to be tested on the conveyor belt mechanism. The ball bearings on both sides abut against the two sides of the battery under the support of springs, and adaptively clamp and convey it to prevent the battery from tipping or deviating during the forward movement along the inclined conveyor belt surface under the action of its own weight. The anti-tipping structure on both sides can automatically straighten the battery, which can effectively ensure the efficiency and quality of the subsequent testing of the side with the sealing nail welded.

[0020] 3. In this power battery sealing nail welding inspection equipment, when qualified or unqualified batteries are output to the corresponding unloading platform, they will block the light source of the photoelectric counting sensor as they pass through, thereby causing a sudden change in the current / voltage of the photoelectric element, generating a pulse signal to trigger counting, and transmitting it to the control panel for display, so as to realize the automatic counting of qualified and unqualified batteries and increase the functionality of the equipment. Attached Figure Description

[0021] Figure 1 This is a side view of the testing equipment for the sealing nails of a power battery proposed in this utility model.

[0022] Figure 2 This is a rear view structural diagram of a power battery sealing nail post-weld inspection device proposed in this utility model;

[0023] Figure 3 This is a top view schematic diagram of a power battery sealing nail post-weld inspection device proposed in this utility model.

[0024] In the diagram: 1. Bracket A, 2. Support, 3. Support frame, 4. Bracket B, 401. Unloading platform, 5. Guide plate, 501. Motor I, 6. Electric slide rail, 7. Planar shadowless light source, 8. Conveyor belt, 801. Motor II, 9. Spring, 10. Ball bearing, 11. Photoelectric counting sensor, 12. Control panel, 13. Detection camera, 14. Contact sensor, 15. I-beam column, 16. Light curtain sensor. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] A testing device for post-welding of power battery sealing nails, such as Figure 1-3 As shown, the system includes a support A1 with an inclined top surface. A conveyor belt mechanism is provided on the top surface of the support A1. The conveyor belt mechanism includes, according to prior art, two rollers rotatably connected to corresponding sides of the support A1, a conveyor belt 8 sleeved on the outer wall of the two rollers, and a motor 801 fixedly connected to one side of the support A1 and electrically connected to a PLC control module via a support plate. The output end of the motor 801 is connected to one end of one of the rollers via a coupling. The battery to be tested is placed on the inclined conveyor belt mechanism and conveyed forward.

[0028] The top surface of the support A1 located on both sides of the conveyor belt mechanism is provided with an anti-tipping structure. The anti-tipping structure includes two supports 2 fixed to the top surface of the support A1 by bolts, several I-beams 15 inserted into the inner wall of the support 2 at equal intervals, springs 9 sleeved on the outer circumference of the I-beams 15, and ball bearings 10 rollingly connected to the inner wall of one end of the I-beams 15. The two ends of the springs 9 are respectively welded to the corresponding side of the I-beams 15 and the support 2.

[0029] The battery to be tested is placed on the conveyor belt mechanism. The ball bearings 10 on both sides abut against the two sides of the battery under the support of the spring 9, and adaptively clamp and transport it to prevent the battery from tipping over or shifting while it is being transported and moving forward along the inclined conveyor belt 8 under its own weight. The anti-tipping structure on both sides can automatically straighten the battery, which can effectively ensure the efficiency and quality of the subsequent testing of the side with the sealed nail welded position.

[0030] The top surfaces of the two supports 2 are fixed to the same support frame 3 by bolts, and a control panel 12, including a display screen, an internal PLC control module, etc., is fixed to one side of the outer wall of the support frame 3 by bolts.

[0031] The support frame 3 has an electric slide rail 6 on its top inner wall. A moving block is slidably connected to the inner wall of the electric slide rail 6. A detection camera 13 is fixed to the bottom outer wall of the moving block by bolts. The electric slide rail 6, the detection camera 13 and the PLC control module are communicatively connected. The electric slide rail 6 drives the moving block and its lower structure to move in the left and right directions, thereby realizing the adjustment of the position of the detection camera 13. It is easy to operate and can fully capture the sealing nail welding position surface of batteries of different sizes.

[0032] Preferably, the detection camera 13 is a 5-megapixel camera of OPT-CM500-GL-04 with a resolution of 2592×1944, a sensor size of 5.7mm×4.3mm, and is equipped with a TL-0.3X-5MP-110F 0.3x telecentric lens;

[0033] Furthermore, a planar shadowless light source 7 is bolted to one side of the support frame 3 located below the electric slide rail 6; the planar shadowless light source 7 is turned on to assist the detection camera 108 in taking pictures of the battery products below it.

[0034] Preferably, the planar shadowless light source 7 includes a light source controller that can control the light source's on / off state and adjust its brightness. The light source controller is a DKZ2-24V-4-AC digital light source controller.

[0035] Furthermore, a light curtain sensor 16 is bolted to one side of the support frame 3 near the bottom. The light curtain sensor 16 consists of an infrared receiver and an infrared transmitter arranged in opposite positions, and the infrared receiver is communicatively connected to the PLC control module. When the battery to be tested is transferred between the infrared receiver and the infrared transmitter, the infrared receiver cannot receive the light source from the infrared transmitter, so it will transmit a signal to the PLC control module, so that the PLC control module can control the motor 801 to stop running, so that the detection camera 13 can take a picture of the battery product directly below.

[0036] As a supplement, a vision analysis module that communicates with the PLC control module is also included. The vision analysis module includes a camera calibration block for calibrating the camera, an identification positioning block for identifying products, and a defect identification detection block for identifying defects.

[0037] Preferably, the camera calibration block adopts the checkerboard calibration method, which is implemented using the tool CogCalibCheckboardTool;

[0038] Preferably, the identification and positioning of the blocks is achieved using the template matching tool CogPMAlignTool and the spatial coordinate system tool CogFixtureTool.

[0039] Preferably, the template matching tool is used to retain the main features; the spatial coordinate system tool is used to establish a precise positioning coordinate system.

[0040] Preferably, the defect identification and detection block uses the CogBlobTool to identify background pixels and target pixels through threshold segmentation, and the area formed by the combination of target pixels is regarded as a spot; the detection camera 13 transmits the image of the battery's sealed nail welding position surface captured to the PLC control module so that the visual analysis module can identify and analyze the information to determine whether it is qualified.

[0041] Working principle: The battery to be tested is placed on the conveyor belt mechanism. The ball bearings 10 on both sides abut against the two sides of the battery under the support of the spring 9, and adaptively clamp and transport it to prevent the battery from tipping over or deviating while it is being transported and moving forward along the inclined conveyor belt 8 under its own weight.

[0042] When the battery to be tested is transferred between the infrared receiver and the infrared transmitter, the infrared receiver cannot receive the light source from the infrared transmitter. In this case, it will send a signal to the PLC control module so that the PLC control module can control the motor 801 to stop running. This allows the detection camera 13 to take a picture of the battery product directly below and transmit the image of the battery's sealed nail position surface to the PLC control module so that the vision analysis module can identify and analyze the information to determine whether it is qualified.

[0043] Example 2

[0044] A testing device for post-welding of power battery sealing nails, such as Figure 1-3 As shown, in order to automatically distinguish between qualified and unqualified batteries, this embodiment makes the following improvements based on embodiment 1: it also includes a bracket B4 that is fixed to the outer wall of one side of the bracket A1 by bolts. The bracket B4 consists of a platform and unloading platforms 401 distributed on both sides of the platform for conveying qualified and unqualified batteries.

[0045] Furthermore, a guide plate 5 is rotatably connected to the top outer wall of the platform, and the bottom surface of the guide plate 5 is connected to the output end of motor 501, which is fixed to the bottom inner wall of bracket B4 by bolts, via a connecting shaft; two contact sensors 14 are fixed to the side of bracket A1 facing bracket B4 by bolts, and both contact sensors 14 and motor 501 are communicatively connected to the PLC control module.

[0046] When a defective product is detected, the vision analysis module sends a signal to the PLC control module, which then starts motor 501, causing guide plate 5 to rotate. When one end of guide plate 5 contacts one of the contact sensors 14 [as shown on the right], ... Figure 3As shown, contact sensor 14 transmits a signal to the PLC control module, which stops motor 501, allowing unqualified batteries conveyed by the conveyor belt mechanism to slide onto the platform and the left unloading table 401, and then move out along the left unloading table 401. Conversely, when a qualified product is detected, the vision analysis module transmits a signal to the PLC control module, which starts motor 501, causing guide plate 5 to rotate in the opposite direction. When the other end of guide plate 5 contacts another contact sensor 14 (as shown on the left), contact sensor 14 transmits a signal to the PLC control module, which stops motor 501, allowing qualified batteries conveyed by the conveyor belt mechanism to slide onto the platform and the right unloading table 401, and then move out along the right unloading table 401. This system can guide and distinguish between qualified and unqualified batteries, enabling automatic classification and storage of qualified and unqualified batteries, making it convenient to use.

[0047] As a supplement, two photoelectric counting sensors 11 electrically connected to the PLC control module are fixed to one side of the bracket B4 located at the bottom of the two unloading platforms 401 by bolts. This is the prior art. When qualified or unqualified batteries are output from the corresponding unloading platform 401, they will block the light source of the photoelectric counting sensor 11 when passing through, thereby causing a sudden change in the current / voltage of the photoelectric element, generating a pulse signal to trigger counting, and transmitting it to the control panel 12 for display, so as to realize the automatic counting of qualified and unqualified batteries and increase the functionality of the equipment.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A power battery sealing nail welding post-weld inspection device, comprising a bracket A (1) and a bracket B (4) fixedly connected to the outer wall of one side of the bracket A (1), characterized in that, The top surface of the support A(1) is inclined, and a conveyor belt mechanism is provided on the top surface of the support A(1). The support B (4) consists of a platform and unloading platforms (401) distributed on both sides of the platform; the top outer wall of the platform is rotatably connected to a guide plate (5), and the bottom surface of the guide plate (5) is connected to the output end of a motor (501) fixedly connected to the bottom inner wall of the support B (4) through a connecting shaft. Two contact sensors (14) are fixedly connected to one side of the bracket A (1).

2. The power battery sealing nail post-weld inspection equipment according to claim 1, characterized in that, Two photoelectric counting sensors (11) are fixedly connected to one side of the bracket B (4) located at the bottom of the two unloading platforms (401).

3. The power battery sealing nail welding post-testing equipment according to claim 1, characterized in that, The conveyor belt mechanism includes two rollers rotatably connected to one side of the support A (1), a conveyor belt (8) sleeved on the outer wall of the two rollers, and a motor (801) fixedly connected to one side of the support A (1) by a support plate. The output end of the motor (801) is connected to one end of one of the rollers by a coupling.

4. The power battery sealing nail welding post-testing equipment according to claim 1, characterized in that, The top surface of the support A (1) is provided with an anti-tipping structure, which includes two supports (2) fixedly connected to the top surface of the support A (1), multiple I-beams (15) inserted at equal intervals into the inner wall of the supports (2), springs (9) sleeved on the outer circumference of the I-beams (15), and ball bearings (10) rollingly connected to the inner wall of one end of the I-beams (15). The two ends of the springs (9) are respectively fixedly connected to the corresponding side of the I-beams (15) and the supports (2).

5. The power battery sealing nail post-weld inspection equipment according to claim 4, characterized in that, The top surfaces of the two supports (2) are fixedly connected to the same support frame (3), and a control panel (12) is fixedly connected to one side of the outer wall of the support frame (3).

6. The power battery sealing nail post-weld inspection equipment according to claim 5, characterized in that, The support frame (3) has an electric slide rail (6) on its top inner wall, and a moving block is slidably connected to the inner wall of the electric slide rail (6). A detection camera (13) is fixedly connected to the bottom outer wall of the moving block.

7. The power battery sealing nail post-weld inspection equipment according to claim 6, characterized in that, A planar shadowless light source (7) is fixedly connected to one side of the support frame (3) located below the electric slide rail (6).

8. The power battery sealing nail post-weld inspection equipment according to claim 7, characterized in that, A light curtain sensor (16) is fixedly connected to one side of the support frame (3). The light curtain sensor (16) consists of an infrared receiver and an infrared transmitter arranged in relative positions.

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