Cylindrical battery detection mechanism

Abstract

The utility model provides a cylindrical battery detection mechanism, including support subassembly, clamping subassembly and detection component. Support subassembly is cylindrical structure, provides stable support for battery body, clamping subassembly passes through two independent adjustable clamping end and rotary drum, realizes stable reliable centering, reduces friction, reduces damage risk, two detection ends of detection component move in second direction, and the battery is detected in an all-round way, and interference is reduced. In addition, through specific layout and structure design, such as rotary drum vertical setting, clamping end setting buffer and rigid connection, drum and battery vertical direction midpoint alignment etc.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic testing technology for batteries, and in particular to a testing mechanism for cylindrical batteries. Background Technology

[0002] In the production and quality control of cylindrical batteries, the testing process is a crucial step in ensuring battery performance and safety. However, existing cylindrical battery testing technologies face numerous challenges in practical applications, particularly in terms of clamping, centering, and rotation settings. These issues directly affect testing results, increase the risk of errors, and adversely impact the stability of the battery itself.

[0003] Traditional testing methods typically involve clamping and positioning the battery body at both ends along its axial direction, with a rotating device positioned at one end of the battery body's axial axis. A testing mechanism then performs radial inspection on the battery body. This design presents several significant technical problems: First, the clamping device along the battery body's axial direction must simultaneously perform multiple functions, including clamping, centering, and rotational drive. This multi-functional integrated design is prone to interference between these functions. For example, achieving good clamping and centering often requires a large clamping force, which significantly increases the friction between the battery body and the clamping device, thus affecting the smoothness of rotation and the accuracy of speed control. Conversely, reducing the clamping force to facilitate rotation can lead to unstable clamping and inaccurate centering, thereby affecting the reliability of the test data.

[0004] When the battery body rotates and comes into contact with the testing device, the vibration and interference signals generated by the rotating equipment will further interfere with the normal operation of the testing device, introducing noise into the detection signal and reducing the accuracy and resolution of the detection. Furthermore, placing the rotating equipment on one side of the battery body's axis will cause the battery body to be subjected to uneven forces during rotation, resulting in a certain degree of twisting or swaying relative to the other side. This mechanical stress not only affects the structural integrity of the battery body but also causes changes in the position of the detection point, thus introducing additional errors.

[0005] Existing technologies face challenges in controlling the rotational speed of the battery body. The complex mechanical connections between the rotating device and the clamping mechanism, as well as the dynamic interaction between the battery body and the detection device, make precise control of the rotational speed extremely challenging. Instability in the rotational speed directly affects the data acquisition frequency and signal processing quality of the detection device, thus impacting the efficiency and accuracy of the entire detection process. Furthermore, existing technologies lack effective buffering and protection mechanisms. Deviations in battery body dimensions or uneven clamping forces can easily damage the battery surface, potentially leading to internal short circuits or leaks and other safety hazards.

[0006] In summary, existing cylindrical battery testing technologies have many shortcomings in terms of clamping, centering, and rotation settings. These problems not only hinder further improvement in testing results but also increase the risk of errors and the difficulty of quality control during the production process. Therefore, it is necessary to develop a novel cylindrical battery testing mechanism to solve the aforementioned problems in the existing technology and improve the stability, accuracy, and reliability of the testing. Utility Model Content

[0007] Therefore, it is necessary to provide a cylindrical battery testing mechanism to address the technical problems in existing cylindrical battery testing, such as poor testing results, easy errors, and impact on battery stability caused by unreasonable clamping, centering, and rotation settings. This mechanism would make the cylindrical battery testing process more stable and accurate, effectively improving the testing results and the protection of the battery body.

[0008] This utility model provides a cylindrical battery testing mechanism, comprising: a support assembly with a vertically distributed battery body at its upper end, defining two mutually perpendicular directions passing through the battery body's axis on a horizontal plane, namely a first direction and a second direction; a clamping assembly including two clamping ends located on both sides of the battery body and moving along the first direction, with two rotating cylinders simultaneously tangent to the battery body on the side of each clamping end near the battery body; and a testing assembly including two testing ends located on both sides of the battery body and moving along the second direction, each testing end including a self-rotating roller, with a testing device for testing the battery body arranged on the axis of the roller, and a coupling layer in contact with the battery body outside the roller. This cylindrical battery testing mechanism achieves efficient and accurate testing of cylindrical batteries through the ingenious combination of the support assembly, clamping assembly, and testing assembly. The support assembly provides stable support for the battery body, and the clamping assembly achieves stable and reliable centering through the simultaneous tangency of the rotating cylinders on the two clamping ends with the battery body, reducing friction with the battery and lowering the risk of damage to the battery surface. The two detection ends of the detection assembly move in a second direction, enabling comprehensive and detailed inspection of the battery body. Furthermore, the clamping device and the detection device are located in different directions, reducing interference and improving detection efficiency. Simultaneously, radial clamping and centering of the battery body allows the rotating roller to drive the battery body to rotate as well, facilitating speed control, ensuring battery stability during inspection, and improving the accuracy and reliability of the inspection.

[0009] In other embodiments, the support component is a cylindrical structure, and the diameter of the support portion that contacts the battery body is smaller than the diameter of the battery body. This allows the battery body to extend the support component on a horizontal plane, providing convenient conditions for subsequent centering via a rotating drum. This makes it easier for the rotating drum to contact the side of the battery, achieving more precise centering operations. At the same time, it increases the stability of the entire testing mechanism, making the testing process more reliable.

[0010] In other embodiments, the clamping end includes a column, the lower end of which is threaded to a lead screw seat and moves with the rotation of the first lead screw. The relative position is adjusted by the rotation of the first lead screw. The two clamping ends are independently controlled by their respective first lead screws, which improves the centering accuracy. Each clamping end can be finely adjusted according to the actual situation to ensure that the four rotating drums are tangent to the battery body at the same time, achieving precise centering. Moreover, the first lead screw drive has the characteristics of smooth transmission and high precision, meeting the requirements of high-precision testing.

[0011] In other embodiments, the rotating cylinder is vertically arranged and connected to the column, and the midpoint of the line connecting the axes of the two rotating cylinders is located in the first direction. This layout ensures that the rotating cylinder can maintain stable contact with the battery body during movement, achieving precise centering. The design of the connecting block increases structural stability, making the rotating cylinder less prone to deformation or displacement when subjected to force, further improving centering accuracy. Moreover, the vertical arrangement facilitates installation and maintenance, reducing usage costs.

[0012] In other embodiments, a buffer structure is provided between the rotating drum on one of the clamping ends and the column, and the rotating drum on the other clamping end is rigidly connected to the column. The clamping end with the rigid connection is also provided with a limiting device for positioning the column. Typically, the position of the rigid clamping end is determined first. After the position of the battery body is determined, the roller of the rigid clamping end contacts the battery body, and then the first lead screw controls the other clamping end to move closer to the battery body. The buffer structure can improve the connection and centering effect of the battery body, absorb the impact force caused by the size deviation of the battery body or uneven clamping force, and avoid damage to the battery. The rigid connection ensures positioning accuracy and stability, making the entire clamping process more reliable.

[0013] In other embodiments, the midpoint of the battery in the vertical direction is at the same height as the midpoint of the rotating drum in the vertical direction. This avoids the possibility of poor centering of the battery body due to uneven force applied by the rotating drum up and down caused by the presence of the buffer structure, thus ensuring the stability of the battery in the vertical direction. It also allows the rotating drum to apply clamping force evenly, achieving more precise centering, improving the balance of the battery during the testing process, and reducing errors and interference caused by tilting.

[0014] In other embodiments, a sliding bracket is connected to the lower end of the roller, and a first motor that drives the roller to rotate is connected to the sliding bracket. Preferably, the linear speed of the roller's rotation does not exceed 10 mm / s, which facilitates the subsequent detection device to detect the battery body and ensures that the roller and the battery under test are relatively stationary when the transmitting array transducer scans. That is, the roller rotates slowly, while the ultrasonic signal transmission and acquisition are very fast. The two times can be similar to being relatively stationary, which improves the detection accuracy. At the same time, it reduces the vibration and noise generated by high-speed rotation, providing a more stable environment for the detection process. Furthermore, the first motor must have precise speed control capability and stable output characteristics to meet the requirements of high-precision detection.

[0015] In other embodiments, the sliding bracket is slidably mounted on the mounting frame. The mounting frame contains a second lead screw threaded to the sliding bracket. Two sliding brackets are connected via the same second lead screw, and the corresponding threads on the two sliding brackets are arranged in opposite directions. One end of the second lead screw is connected to a second motor. The midpoint of the line connecting the axes of the two rollers coincides with the axis of the battery body, allowing the rotation of the second lead screw to synchronously and evenly clamp the battery body with the two rollers. This avoids uneven deformation thickness of the coupling layer affecting the detection effect. This synchronous clamping method ensures uniform pressure distribution between the rollers and the battery, reducing the impact of uneven coupling layer deformation thickness on the detection results. The precise control of the second motor makes the clamping process more stable and reliable, reducing errors and interference caused by uneven clamping force. The mounting frame provides a stable support platform for the entire detection mechanism, ensuring the smooth progress of the detection process.

[0016] In other embodiments, the coupling layer is a silicone rubber layer. Preferably, the hardness of the silicone rubber layer is 15-25 Shore A. At this hardness, the coupling layer is less likely to damage the battery, while the silicone rubber layer provides a certain friction effect. The moderate hardness ensures good contact between the coupling layer and the battery, while avoiding damage to the battery surface due to excessive hardness. The friction effect of the silicone rubber layer helps the roller drive the battery to rotate, improving the stability and reliability of the entire testing process. The hardness of 15-25 Shore A ensures that the coupling layer has good elasticity and can deform. The deformation of the coupling layer eliminates the air between the outer wall of the roller and the cylindrical battery under test, thus ensuring complete coupling between the outer wall of the roller and the cylindrical battery under test.

[0017] Other embodiments also include a connecting frame that spans the mounting frame. The upper surface of the connecting frame is horizontally positioned, and the support and clamping components are mounted on the connecting frame to reduce interference and improve the overall effect. The design of the connecting frame makes the relative positional relationship between the components more fixed and stable, reducing interference and errors caused by vibration or movement. The horizontally positioned upper surface provides a stable platform for battery placement and testing, ensuring the accuracy of the testing process. Furthermore, the connecting frame can be customized and adjusted according to actual needs to meet the testing requirements of batteries of different specifications and models. Attached Figure Description

[0018] Figure 1 This is a top view of the present invention.

[0019] Figure 2 This is a perspective view of the present invention.

[0020] Figure 3 This is the front view of the present invention.

[0021] Figure 4 for Figure 3 A sectional view of section AA in the middle.

[0022] Figure 5 for Figure 3 Side view.

[0023] Figure 6 for Figure 5 Sectional view of section BB.

[0024] in:

[0025] 100. Support components;

[0026] 200. Battery body;

[0027] 300. Clamping assembly; 310. Clamping end; 311. Column; 312. Rotary drum; 313. Lead screw seat; 314. First lead screw; 315. Buffer structure; 316. Limiting device;

[0028] 400. Detection assembly; 410. Detection end; 411. Roller; 412. Coupling layer; 413. Sliding bracket; 414. First motor; 415. Mounting bracket; 416. Second lead screw; 417. Second motor; 418. Detection device;

[0029] 500. Connecting bracket. Detailed Implementation

[0030] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0031] like Figures 1-6 As shown, this embodiment discloses a cylindrical battery testing mechanism, characterized by comprising a support component 100, a clamping component 300, and a testing component 400, used for centering and ultrasonic testing of the battery body 200. This testing mechanism, through the collaborative work of multiple components, ensures the precise positioning and stability of the battery during the testing process, thereby improving the accuracy and reliability of the testing.

[0032] Specifically, such as Figure 1As shown, in this embodiment, the support component 100 has a vertically distributed battery body 200 at its upper end. Two mutually perpendicular directions, passing through the axis of the battery body 200, are defined on the horizontal plane of the battery body 200, namely the first direction and the second direction. By defining these two directions, the precise positioning of the battery in the horizontal and vertical directions can be ensured, providing a reference for subsequent clamping and inspection.

[0033] like Figure 4 As shown, the clamping assembly 300 in this embodiment includes two clamping ends 310 located on both sides of the battery body 200 and moving along a first direction. Two rotating cylinders 312, simultaneously tangent to the battery body 200, are provided on the side of each clamping end 310 closest to the battery body 200. This design allows the clamping ends to contact the battery body through the rotating cylinders, reducing friction and damage while providing a stable clamping force.

[0034] like Figure 6 As shown, the detection component 400 in this embodiment includes two detection ends 410 located on both sides of the battery body 200 and moving along a second direction. Each detection end 410 includes a rotating roller 411, and a detection device 418 for detecting the battery body 200 is arranged on the axis of the roller 411. A coupling layer 412 that contacts the battery body 200 is provided outside the roller 411. This ensures that the battery under test forms a good and stable surface contact with the roller, thereby guaranteeing efficient ultrasonic propagation.

[0035] In this embodiment, the support component 100 has a cylindrical structure, and the diameter of the support portion of the support component 100 that contacts the battery body 200 is smaller than the diameter of the battery body 200. This design allows the support component to stably support the battery body while avoiding interference with the detection of the battery body.

[0036] In this embodiment, the clamping end 310 includes a column 311, the lower end of which is threadedly connected to a lead screw seat 313 and moves as the first lead screw 314 rotates. Through lead screw transmission, precise movement of the clamping end can be achieved, thereby adapting to the clamping requirements of battery bodies of different diameters.

[0037] In this embodiment, the rotating drum 312 is vertically arranged and connected to the column 311, and the upper and lower ends of the roller 411 are respectively connected to the column 311 through connecting blocks, and the midpoint of the line connecting the axes of the two rotating drums 312 is located in the first direction. This layout ensures that the rotating drums can maintain symmetry when clamping the battery body, thereby improving the stability of clamping and the accuracy of centering.

[0038] In this embodiment, a buffer structure 315 is provided between the rotating cylinder 312 on one of the clamping ends 310 and the column 311. The buffer structure 315 is a combination of a spring and a telescopic rod. The rotating cylinder 312 on the other clamping end 310 is rigidly connected to the column 311. The rigidly connected clamping end 310 is also equipped with a limiting device 316 for positioning the column 311. The limiting device 316 includes a screw that passes through the column 311 and contacts a lead screw, thereby positioning the clamping end 310. The buffer structure absorbs the impact force during clamping, protecting the battery body from damage; while the rigid connection and limiting device ensure the precise position and stability of the clamping end.

[0039] In this embodiment, the midpoint of the battery 200 in the vertical direction and the midpoint of the rotating drum 312 in the vertical direction are at the same height. This design ensures that the battery body is subjected to uniform force in the vertical direction, further improving the centering accuracy.

[0040] In this embodiment, a sliding bracket 413 is connected to the lower end of the roller 411, and a first motor 414 that drives the roller 411 to rotate is connected to the sliding bracket 413. The linear speed of rotation of the roller 411 is less than 10 cm / s. Low-speed rotation can reduce the vibration and displacement of the battery body during the detection process, thereby improving the stability of the detection.

[0041] In this embodiment, the sliding bracket 413 is slidably mounted on the mounting frame 415. A second lead screw 416, threadedly connected to the sliding bracket 413, is provided within the mounting frame 415. Two sliding brackets 413 are connected by the same second lead screw 416, and the corresponding threads on the two sliding brackets 413 are arranged in opposite directions. One end of the second lead screw 416 is connected to a second motor 417. The midpoint of the line connecting the axes of the two rollers 411 coincides with the axis of the battery body 200. This design allows the two rollers to move synchronously, maintaining symmetrical contact with the battery body, thereby improving the accuracy of the detection.

[0042] In this embodiment, the coupling layer 412 is a silicone rubber layer with a hardness of 15-25 Shore A. The silicone rubber layer has good elasticity and wear resistance, protecting the battery body from damage while providing stable signal transmission.

[0043] In this embodiment, a connecting frame 500 is also included, which spans across the mounting frame 415. The upper surface of the connecting frame 500 is horizontally positioned, and the support assembly 100 and the clamping assembly 300 are mounted on the connecting frame 500. The design of the connecting frame makes the entire testing mechanism more stable and compact, facilitating installation and maintenance.

[0044] The specific working principle of this embodiment is as follows: First, based on the diameter of the battery body 200, determine the position of one of the clamping ends 310, typically the clamping end 310 rigidly connected to the rotating drum 312 and the column 311. Then, position this clamping end 310 using a limiting device 316. Next, place the battery body 200 onto the support portion of the support assembly 100, ensuring that the axis of the battery body 200 roughly coincides with the axis of the support assembly 100. Finally, use the other clamping end 310 for final centering. The support assembly 100 typically has a certain height, raising the position of the battery body 200 so that the vertical midpoint of the battery 200 is at the same height as the vertical midpoint of the rotating drum 312, improving centering accuracy. This working principle ensures precise positioning and stable clamping of the battery body during the testing process, providing a reliable foundation for subsequent ultrasonic testing.

[0045] The lead screw drives another clamping end 310 to move, causing the rotating drum 312 with the buffer structure 315 to continuously contact the battery body 200, thereby centering the battery body 200 through the four rotating drums 312. The coordinated work of the four rotating drums enables the battery body to be accurately positioned in both the horizontal and vertical directions, improving the accuracy and stability of centering.

[0046] Then, the second motor 417, typically a high-precision motor, drives the second lead screw 416 to move, requiring strict control of the movement distance. Since the midpoint of the line connecting the axes of the two rollers 411 coincides with the axis of the battery body 200, the two rollers 411 move synchronously towards the battery body 200 and clamp onto the outer wall of the battery body 200 in the second direction. Simultaneously, they contact the battery body 200 through a coupling layer 412 made of silicone rubber. By controlling the movement distance of the second motor 417, and considering that the silicone rubber layer has a hardness of 15-25 Shore A, the battery 200 will not be damaged, while also improving the contact effect between the rollers 411 and the battery 200. This design allows the rollers to maintain stable contact force and signal transmission efficiency when clamping the battery body, while protecting the battery body from damage.

[0047] The first motor 414 drives the drum 411 to rotate, and simultaneously the drum 411 drives the battery body 200 to rotate through the coupling layer 412. At this time, the detection device 418, which is usually an ultrasonic detection device, refers to a linear array ultrasonic transducer, which can both emit and receive ultrasonic signals. The linear array ultrasonic transducers in the two drums 411 are at the same height and are arranged opposite each other. One linear array ultrasonic transducer emits ultrasonic waves, and the other linear array ultrasonic transducer receives transmitted ultrasonic waves. At the same time, a coupling fluid is contained inside the drum 411 to realize ultrasonic detection.

[0048] Ultrasonic testing of the battery body 200 is performed. Because the first motor 414 rotates very slowly, the linear speed of the rotating roller 411 is controlled to not exceed 10 mm / s. Combined with the centering effect of the battery body 200, this results in a more uniform contact thickness between the silicone rubber layer and the battery body 200, thereby improving the testing effect. This low-speed rotation and precise centering design allows ultrasonic testing to be performed in a stable environment. The hardness of the silicone rubber layer ensures that the coupling layer has good elasticity and can deform, thus ensuring complete coupling between the outer wall of the roller and the cylindrical battery under test, isolating air and improving the testing effect.

[0049] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A cylindrical battery testing mechanism, characterized in that, include: A support assembly has a vertically distributed battery body at its upper end, and two mutually perpendicular directions, namely a first direction and a second direction, are defined on the horizontal plane of the battery body. A clamping assembly includes two clamping ends located on both sides of the battery body and moving along the first direction. Two rotating cylinders that are tangent to the battery body are provided on the side of the clamping ends near the battery body. A detection assembly includes two detection ends located on both sides of the battery body and moving along the second direction. Each detection end includes a rotating roller, and a detection device for detecting the battery body is provided on the axis of the roller. A coupling layer that contacts the battery body is provided outside the roller.

2. The cylindrical battery testing mechanism as described in claim 1, characterized in that: The support component is a cylindrical structure, and the diameter of the support portion that contacts the battery body is smaller than the diameter of the battery body.

3. The cylindrical battery testing mechanism as described in claim 1, characterized in that: The clamping end includes a column, the lower end of which is threaded to a lead screw seat and moves as the first lead screw on the lead screw seat rotates.

4. The cylindrical battery testing mechanism as described in claim 3, characterized in that: The rotating drum is vertically mounted and connected to the column, and the midpoint of the line connecting the axes of the two rotating drums is located in the first direction.

5. The cylindrical battery testing mechanism as described in claim 4, characterized in that: A buffer structure is provided between the rotating cylinder on one of the clamping ends and the column, and the rotating cylinder on the other clamping end is rigidly connected to the column. The clamping end with the rigid connection is also provided with a limiting device for positioning the column.

6. The cylindrical battery testing mechanism as described in claim 1, characterized in that: The midpoint of the battery body in the vertical direction is at the same height as the midpoint of the rotating drum in the vertical direction.

7. The cylindrical battery testing mechanism as described in claim 1, characterized in that: The lower end of the roller is connected to a sliding bracket, and a first motor that drives the roller to rotate is connected to the sliding bracket.

8. The cylindrical battery testing mechanism as described in claim 7, characterized in that: The sliding bracket is slidably mounted on the mounting frame. The mounting frame is provided with a second lead screw threaded to the sliding bracket. The two sliding brackets are connected by the same second lead screw, and the corresponding threads on the two sliding brackets are arranged in opposite directions. One end of the second lead screw is connected to a second motor. The midpoint of the line connecting the axes of the two rollers coincides with the axis of the battery body.

9. The cylindrical battery testing mechanism as described in claim 8, characterized in that: It also includes a connecting frame that spans across the mounting frame, the upper surface of the connecting frame being horizontally positioned, and the support assembly and clamping assembly being mounted on the connecting frame.

10. The cylindrical battery testing mechanism as described in claim 1, characterized in that: The coupling layer is a silicone rubber layer.

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