Battery nondestructive testing device

Abstract

The utility model relates to the field of nondestructive testing, in particular to a nondestructive testing device for a battery, which comprises a connecting piece for connecting the battery with an external circuit and / or a power supply and / or a testing device for electrifying the battery, a magnetic field detection assembly for detecting a space magnetic field is arranged at one end of the connecting piece provided with the battery; according to the nondestructive testing device for the battery, the battery is electrified, the self-magnetic field generated by the battery is detected, and the internal condition of the battery can be further known through comparison and analysis of the self-magnetic field and known information.

Description

Technical Field

[0001] The utility model belongs to the field of non-destructive testing, and specifically relates to a battery non-destructive testing device. Background Art

[0002] With the continuous development of electronic devices, people's requirements for batteries are constantly increasing, and higher requirements are put forward for the research and development of batteries. In order to improve the understanding of abnormal conditions of abnormal batteries, related technologies need to improve the understanding of the internal structure of batteries.

[0003] Currently, the main methods for detecting the internal conditions of batteries are to detect whether there are abnormalities through electrochemical performance and disassemble and analyze abnormal batteries. However, this method often causes secondary damage to the internal materials of the batteries, thus causing certain interference to the analysis of the batteries. The non-destructive testing of batteries usually includes X-ray imaging technology, magnetic field scanning imaging technology, ultrasonic testing technology, etc. Among them, the X-ray imaging technology has a relatively shallow penetration depth and is more suitable for the detection of thinner batteries; ultrasonic testing causes a certain degree of attenuation in thicker shell-shaped batteries, affecting the accuracy of battery detection; while the magnetic field scanning imaging technology usually uses an external magnetic field and the method of inducing a superimposed magnetic field for detection, and the detection depth is also limited.

[0004] Therefore, it is necessary to develop a device that is convenient for deep non-destructive testing of batteries. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a battery non-destructive testing device.

[0006] To solve the above technical problem, the present application proposes a battery non-destructive testing device;

[0007] A battery non-destructive testing device includes a connecting member for connecting the battery to a detection device for an external circuit and / or a power source and / or for energizing the battery; a magnetic field detection component for detecting the spatial magnetic field is provided at one end of the battery where the connecting member is disposed.

[0008] Preferably, the magnetic field detection component includes a detection probe and a processor for receiving and processing the information captured by the detection probe. The detection probe is provided as a single one or multiple ones, and all the detection probes are electrically connected to the processor.

[0009] Preferably, it further includes a limiting component for limiting the magnetic field detection component. The limiting component includes a limiting bracket, and the detection probe is disposed on the limiting bracket.

[0010] Preferably, the relative position of the detection probe and the limiting bracket is adjustable.

[0011] Preferably, the limiting component includes a first guide rail and / or one or more guide rails slidably arranged along the first guide rail. The movement of each guide rail is controlled by a processor, and under the action of the guide rails, the detection probe moves in space.

[0012] Preferably, a plurality of detection probes are provided. The detection probe slidably connected to the guide rail is a first detection probe. An adjusting member is movably arranged at the connecting part of the guide rail and the first detection probe, and a second detection probe is arranged on the adjusting member. The relative position between the second detection probe and the first detection probe is adjustable.

[0013] Preferably, a slider is slidably arranged on the guide rail, and the detection probe is slidably connected to the guide rail through the slider. The adjusting member is rotatably connected to the slider.

[0014] Preferably, the adjusting member is further connected to a control member capable of adjusting its length. The control member supports the adjusting member, and the control member is rotatably connected to the slider and / or the guide rail.

[0015] Preferably, the adjusting member has the ability to change its length.

[0016] Preferably, it further includes a magnetic field shielding cover and a housing. The connecting member, the magnetic field detection component and the limiting component are arranged in the housing cavity, and the magnetic field shielding cover is arranged at the detection end of the detection probe and / or the side wall of the housing.

[0017] After adopting the above technical solutions, the present utility model has the following beneficial effects compared with the prior art:

[0018] When detecting a battery, a staff member can connect the battery to an external circuit or a power source through the connecting member, so that the battery is in a charging / discharging state, and the self-magnetic field information generated by the battery under the energized state is detected by the detection probe. Since the method of energizing the battery is adopted to generate an electromagnetic field, during this process, the current passes through each component of the battery and is distributed dispersedly in the battery. The self-magnetic field information contains information of each component and each part of the battery, which can effectively increase the detection depth of the battery. At this time, by comparing the measured self-magnetic field information with the magnetic field information of a battery with known internal conditions, the internal conditions of the battery can be preliminarily analyzed;

[0019] By setting the guide rail, the detection probe is slidably arranged in space, which is convenient for dynamically adjusting the detection position of the magnetic field. During the detection process, the staff member can adjust the moving path and moving speed of the detection probe through the processor to collect the overall magnetic field information and refine the collection of local magnetic field information, which is convenient for the analysis of local defects;

[0020] Through the setting of the adjusting member, when it is detected that the magnetic field information is abnormal, the staff can keep the position of the detection probe connected to the guide rail, and by adjusting the adjusting member, make the detection probe on the adjusting member move relatively, which is convenient for accurately positioning the abnormality and improving the detection accuracy. At the same time, through comparison and difference analysis of the information collected by the two detection probes, it is also convenient for intuitively judging and analyzing the intensity of the abnormality. Brief Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of a battery non-destructive testing device in Embodiment 1 of the present application;

[0022] Figure 2 is a schematic diagram for highlighting the battery platform in Embodiment 1 of the present application;

[0023] Figure 3 is Figure 1 an enlarged view of part A in;

[0024] Figure 4 is a schematic diagram of the magnetic field detection component in Embodiment 1 of the present application;

[0025] Figure 5 is a schematic diagram of the overall structure of a battery non-destructive testing device in Embodiment 2 of the present application;

[0026] Figure 6 is a schematic diagram for highlighting the adjusting member in Embodiment 3 of the present application;

[0027] Figure 7 is a schematic diagram of another angle for highlighting the adjusting member in Embodiment 3 of the present application;

[0028] Figure 8 is a schematic diagram of the overall structure of a battery non-destructive testing device in Embodiment 4 of the present application;

[0029] Figure 9 is a schematic diagram for highlighting the internal structure of the housing in Embodiment 4 of the present application.

[0030] In the figure: 1. Battery platform; 2. Connecting piece; 201. Wiring terminal; 202. Connecting wire; 203. Battery test clip; 3. Magnetic field detection component; 301. Detection probe; 302. Processor; 303. Memory; 4. Limiting component; 401. Limiting bracket; 402. Limiting hole; 403. Locking piece; 404. First guide rail; 405. Second guide rail; 406. Third guide rail; 407. Support frame; 5. Slide block; 6. Adjusting member; 7. Control member; 8. Housing. Detailed Description of the Embodiment

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not intended to limit the scope of the present utility model.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] The following further describes in detail the specific implementation manners of the present utility model with reference to the drawings.

[0035] Embodiment 1

[0036] A battery non-destructive testing device, referring to Figure 1 and Figure 2 , includes a battery platform 1 for placing a battery. A connecting member 2 is provided on the battery platform 1. In the embodiments of the present application, the connecting member 2 is a terminal 201 connected to a battery test clip 203 through a connecting wire 202. The terminal 201 is embedded in the battery platform 1. The connecting wire 202 passes through the battery platform 1, and one end of the connecting wire 202 away from the terminal 201 penetrates out of the side wall of the battery platform 1. The battery test clip 203 is connected to the protruding end of the connecting wire 202. In other embodiments, the connecting member 2 can also be placed or provided on the side wall of the battery platform 1 in forms such as screwing, bonding, or welding.

[0037] During use, the staff only needs to connect the battery tabs to the battery test clips 203 respectively and set them up, and connect them to the external circuit or power supply through the terminal 201, then the battery can be in an energized state. Since the battery is detected in the energized state, the staff can also connect the battery to the electrical performance detection device through the terminal 201 to detect the internal structure, charge distribution and electrical performance of the battery at the same time, which is convenient and fast. And according to the electrical performance detection results, the results detected by the self-magnetic field non-destructive detection method can also be corrected, so as to effectively improve the accuracy of the detection.

[0038] Refer to Figure 1-4 , the non-destructive detection device further includes a magnetic field detection component 3 and a limiting component 4 for limiting the magnetic field detection component 3. The magnetic field detection component 3 includes a detection probe 301, a processor 302 and a memory 303. The memory 303 stores the magnetic field information of the battery with known internal conditions, and the magnetic field information of the battery with known internal conditions can be obtained by the method with the patent application number 2024103977498; the detection probe 301 is electrically connected to the processor 302, and the processor 302 is electrically connected to the memory 303. After the information detected by the detection probe 301 is transmitted to the processor 302, the processor 302 retrieves the information in the memory 303 for comparison and analysis; in the embodiment of the present application, the detection probe 301 is a transverse Hall probe, and the limiting component 4 includes a limiting bracket 401. The detection probe 301 is arranged on the limiting bracket 401. The limiting bracket 401 is integrally arranged in an inverted U shape, and the battery stage 1 is arranged at the U-shaped opening position of the limiting bracket 401. The symmetry plane of the limiting bracket 401 along the opening groove direction overlaps with one of the symmetry planes of the battery stage 1. Threaded mounting holes are opened at the top of the U-shaped side wall of the limiting bracket 401, and the limiting bracket 401 can be detachably mounted on the surface of the workbench through bolts. When detecting batteries of different specifications, limiting brackets 401 of different sizes can be selected according to the specification dimensions of the batteries, effectively improving the practicability of the device.

[0039] Refer to Figure 1 and Figure 3, the U-shaped side wall of the limit bracket 401 is also penetrated with a plurality of limit holes 402, and the plurality of limit holes 402 are arranged in an array, and the detection probe 301 is set through the limit hole 402, and the limit hole 402 is located on the inner side wall of the outer side wall of the limit bracket 401. A locking member 403 is fixedly provided. In the embodiment of the present application, the locking member 403 is a separate fixing ring; the locking member 403 is connected to different parts of the detection probe 301, and the relative position between the detection probe 301 and the limit bracket 401 and the battery can be adjusted, so as to further limit the detection probe 301, improve the stability of the detection probe 301, and ensure the normal detection process. In other embodiments, a three-dimensional Hall probe, a three-dimensional coil, a Gaussian probe, etc. can also be selected as the detection probe 301; when a sheet detection probe 301 such as a sensitivity test piece is selected, it is not necessary to set the locking member 403, and the detection probe 301 can be directly attached to the side wall of the limit bracket 401 facing the battery station 1.

[0040] In this embodiment, four detection probes 301 are provided (only one is shown in the figure for example), and the four detection probes 301 are arranged symmetrically with the symmetric plane of the battery platform 1 as a mirror plane. In other embodiments, the number and distribution of the detection probes 301 can be adjusted according to the size, capacity, specific capacity and other specifications of the battery to be detected.

[0041] In addition, in other embodiments, in order to reduce the interference of noise during the magnetic field detection process, the position where the detection probe 301 is arranged on the limit bracket 401 can also be provided with a magnetic field shielding cover by screwing, welding, bonding, etc. The magnetic field shielding cover covers the detection end of the detection probe 301 in the cavity of the magnetic field shielding cover, and the opening of the magnetic field shielding cover is arranged toward the battery.

[0042] The principle of the embodiment of the present application is that when detecting the internal material condition of the battery, the staff can connect the battery to the external circuit, other power sources or other detection devices that energize the battery through the connector 2, and put the battery in a charge / discharge state. The battery in the energized state generates a certain self-magnetic field, and the magnetic field detection component 3 limited by the limit component 4 captures and outputs the magnetic field information of the battery. By comparing and analyzing the magnetic field information with the magnetic field information of the known structural defect structure battery, a preliminary judgment can be made on the internal defects of the battery. In addition, the current condition inside the battery can also be calculated based on the magnetic field condition.

[0043] Example 2

[0044] A battery nondestructive testing device, such as Figure 5As shown, the difference from Example 1 is that, in order to facilitate the comprehensive coverage detection of magnetic field information at different positions by the detection probe 301, the limit assembly 4 includes a first guide rail 404, a second guide rail 405, a third guide rail 406 and a support frame 407, wherein the support frame 407 is arranged in a rectangular frame shape, the first guide rail 404 is arranged on the side of the support frame 407 away from the battery platform 1, the first guide rail 404 and the second guide rail 405 are arranged along the length and width directions of the battery platform 1 respectively, the third guide rail 406 is arranged along the height direction of the battery platform 1, and the third guide rail 406 can slide along the second guide rail 405, and slide along the first guide rail 404 with the second guide rail 405. In other embodiments, in order to improve the convenience of detection, the setting directions of the first guide rail 404, the second guide rail 405, and the third guide rail 406 can also be interchanged.

[0045] Among them, the first guide rail 404, the second guide rail 405 and the third guide rail 406 can all be independently selected from commercially available guide rails such as screw guide rails and slider linear rails; in order to improve the influence of cables on detection during movement, the limit assembly 4 also includes a cable protector (not shown in the figure). In the embodiment of the present application, the cable protector is a tank chain, and the minimum curvature radius of the cable protector is greater than the minimum curvature radius of the cable connected to the detection probe 301, and the cable connected to the detection probe 301 is passed through the cable protector.

[0046] Reference Figure 5 A slider 5 is slidably provided on the third guide rail 406, and a locking piece 403 is fixedly provided on the side of the slider 5 away from the third guide rail 406. It is set as a single detection probe 301. The detection probe 301 is limited by the locking piece 403, so that the detection probe 301 can be installed on the third guide rail 406 and the detection probe 301 can slide along the third guide rail 406. In order to facilitate the positioning of the detection probe 301, cylinders are provided on the first guide rail 404, the second guide rail 405 and the third guide rail 406. The output ends of the cylinders are fixedly connected to the second guide rail 405, the third guide rail 406 and the slider 5 respectively, and all cylinders are electrically connected to the processor 302 and controlled by the processor 302.

[0047] In other embodiments, the number of guide rails may be reduced / increased, and the direction of the guide rails may be adjusted according to actual detection requirements, and whether to use the support frame 407 and the specifications of the support frame 407 may be selected according to the setting of the guide rails.

[0048] The principle of this embodiment is that through the setting of the guide rail, the detection probe 301 can move in a three-dimensional space to collect the magnetic field information of the space where the battery is located in real time, which is convenient for measuring the magnetic field information point by point / orientationally, and is convenient and fast; during the detection process, the staff can also set the movement path through the processor 302 to collect the self-magnetic field information of the battery. At the same time, when an abnormal trend is found, the staff can set a variety of different paths and adjust the movement speed of the detection probe 301 to further refine the collection of the local magnetic field information of the battery, which is convenient for the detection to proceed.

[0049] Embodiment 3

[0050] A battery non-destructive testing device, referring to Figures 6-7 , which is different from Embodiment 2 in that in order to improve the accuracy of magnetic field detection, an adjusting member 6 is connected to the slider 5. In this embodiment of the present application, the adjusting member 6 is a telescopic rod, and a plurality of control members 7 are also provided between the adjusting member 6 and the slider 5. In this embodiment of the present application, the control member 7 is a telescopic cylinder, and the adjusting member 6 and the slider 5 are connected by a spherical rod end joint. The telescopic cylinder is electrically connected to the processor 302, and the staff can control the rotation and telescoping of the adjusting member 6 through the processor 302, which is convenient and fast. In other embodiments, the adjusting member 6, the telescopic cylinder and the spherical rod end joint can also be arranged on the slide rail connected to the detection probe 301.

[0051] In addition, a locking member 403 is also fixedly arranged at the end of the adjusting member 6. During the detection process, the detection probe 301 can be installed at the end of the adjusting member 6 through the locking member 403, and the position of the detection probe 301 can be adjusted by controlling the length of the locking member 403. Through the setting of the detection member, the staff can fix the position of the slider 5. At this time, the detection probe 301 located on the slider 5 is fixed, and then the length of the adjusting member 6 is adjusted to make the detection probe 301 at the end of the adjusting member 6 move relative to the detection probe 301 installed on the slider 5, which is convenient for detecting the relative change of the magnetic field and accurately judging the defect condition of the battery.

[0052] The principle of this embodiment is that by adjusting the detection settings, it is convenient to adjust the distance between the two detection probes 301. When the general range of the defect is determined, one of the detection probes 301 can be moved directionally to search for the position of the defect, which improves the accuracy of magnetic field analysis.

[0053] Embodiment 4

[0054] A battery non-destructive testing device, referring to Figures 8-9, different from Embodiment 2, it further includes a housing 8. The battery platform 1 is arranged on the bottom wall of the housing 8. The terminal 201 is embedded in the battery platform 1 and protrudes from the side wall of the battery platform 1. In other embodiments, the terminal 201 penetrates through the side wall of the housing 8 close to the battery platform 1 and is electrically connected to the terminal 201 through a connecting wire 202. The first guide rail 404 is installed on the inner side wall of the housing 8, and the magnetic field shielding cover is attached to the inner side wall of the housing 8.

[0055] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above as equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the present invention.

Claims

1. A battery nondestructive testing device, characterized in that: It comprises a connector (2) for connecting a battery to an external circuit and / or a power source and / or a detection device for energizing the battery; a magnetic field detection component (3) for detecting a spatial magnetic field is arranged at one end of the battery provided with the connector (2).

2. A battery nondestructive testing device according to claim 1, characterized in that: The magnetic field detection component (3) comprises a detection probe (301) and a processor (302) for receiving and processing information captured by the detection probe (301); the detection probe (301) is arranged in single or multiple form, and the detection probes (301) are all electrically connected to the processor (302).

3. A battery nondestructive testing device according to claim 2, characterized in that: It also comprises a limiting component (4) for limiting the position of the magnetic field detection component (3), wherein the limiting component (4) comprises a limiting bracket (401), and the detection probe (301) is arranged on the limiting bracket (401).

4. A battery nondestructive testing device according to claim 3, characterized in that: The relative position of the detection probe (301) and the limiting bracket (401) is adjustable.

5. A battery nondestructive testing device according to claim 3, characterized in that: The limiting assembly (4) comprises a first guide rail (404) and / or one or more guide rails slidably arranged along the first guide rail (404), the movement of the guide rails is controlled by a processor (302), and under the action of the guide rails, the detection probe (301) moves in space.

6. A battery nondestructive testing device according to claim 5, characterized in that: The detection probes (301) are arranged in plurality, the detection probe (301) slidably connected to the guide rail is a first detection probe, an adjusting member (6) is movably arranged at the connection portion between the guide rail and the first detection probe, a second detection probe is arranged on the adjusting member (6), and the relative position between the second detection probe and the first detection probe is adjustable.

7. A battery nondestructive testing device according to claim 6, characterized in that: A slider (5) is slidably arranged on the guide rail, the detection probe (301) is slidably connected to the guide rail via the slider (5), and the adjustment member (6) is rotationally connected to the slider (5).

8. A battery nondestructive testing device according to any one of claims 6 or 7, characterized in that: The adjusting member (6) is also connected to a control member (7) having a length adjustment capability. The control member (7) supports the adjusting member (6). The control member (7) is rotatably connected to the slider (5) and / or the guide rail.

9. A battery nondestructive testing device according to any one of claims 6 to 8, characterized in that: The adjusting member (6) has the ability to change its length.

10. A battery nondestructive testing device according to claim 9, characterized in that: It also comprises a magnetic field shielding cover and a shell (8), wherein the connecting piece (2), the magnetic field detection component (3) and the limit component (4) are arranged in the cavity of the shell (8), and the magnetic field shielding cover is arranged at the detection end of the detection probe (301) and / or the side wall of the shell (8).

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