A lithium ion battery rapid screening device

Abstract

The utility model discloses a kind of lithium ion battery fast screening devices, belong to battery recycling technical field.It includes: support frame;Crossbar, multiple and two ends are equipped with first sliding slot, and first sliding slot is equipped with detection probe;Limiting rod, two are equipped, and the detection probe of same end is slidably arranged on corresponding end limiting rod;Crosspiece, including shaft and two cross setting draw bar;First driving part, for driving crossbar;Second driving part, for driving limiting rod.When first driving part drives the relative motion of two crossbars adjacent in it, the distance between other two crossbars adjacent changes synchronously, adjusts the side-by-side distance of detection probe, when second driving part drives the relative motion of two limiting rods, the distance between two detection probes on two sides can be adjusted, so that two rows of detection probes can be adjusted in two directions The distance of battery on different battery cell pole is adapted, the trouble of detection tool replacement is reduced, and detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery recycling technology, and in particular to a rapid screening device for lithium-ion batteries. Background Technology

[0002] With the continuous growth in the market share of new energy vehicles, the demand for power batteries, as a crucial core component of these vehicles, is also increasing rapidly. Conventional power batteries have a lifespan of 5-8 years, leading to a large number of batteries being retired. Battery reuse can extend battery lifespan and increase their residual value. Currently, the industry's method for reuse of lithium-ion batteries involves disassembling the battery pack into individual cells and then reassembling and repackaging them.

[0003] Conventional screening methods include using AC impedance to test the health status of battery cells. When testing battery cells using AC impedance, the testing probe on the testing fixture needs to be aligned with the battery terminals and connected. The probe is also connected to the testing instrument. Since each battery cell requires an independent testing probe for contact connection, the testing fixture has multiple probes fixed on it. Because the distance between battery cells varies between different batteries, and the distance between the positive and negative terminals on the cells also varies, different specifications of testing fixtures are needed for testing different batteries, which is quite cumbersome. Utility Model Content

[0004] The purpose of this invention is to provide a lithium-ion battery fast screening device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: a lithium-ion battery rapid screening device, comprising: a support frame; multiple crossbars, which are slidably arranged side by side on the support frame along a first direction, each crossbar having a first groove at both ends, and a detection probe slidably arranged in the first groove perpendicular to the first direction; a limiting rod, one at each end of the crossbar, with the detection probes at the same end of the multiple crossbars slidably arranged on the corresponding limiting rod along the first direction; a cross member, one on each crossbar, the cross member including a rotating shaft mounted on the crossbar and two pull rods rotatably mounted on the rotating shaft and arranged crosswise, the ends of the pull rods on adjacent crossbars being rotatably connected, so that the distance between any two adjacent crossbars can change synchronously, and the rotating shaft on one of the crossbars being connected to the support frame; a first driving member for driving two adjacent crossbars to move closer or further apart; and a second driving member for adjusting the positions of the two limiting rods.

[0006] This technical solution has at least the following beneficial effects: When the first driving component moves two adjacent crossbars closer or further apart, the distance between the other two adjacent crossbars changes synchronously, thereby adjusting the distance between the side-by-side detection probes in the first direction. When the second driving component moves two limiting rods closer or further apart, the distance between the detection probes on both sides is adjusted, allowing the spacing between the two rows of detection probes to be adjusted in two directions. This adapts to batteries with different cell terminal distances, reduces the hassle of replacing detection fixtures, and improves detection efficiency.

[0007] As a further improvement to the above technical solution, the first driving component includes an adjusting motor for driving one of the pull rods to rotate. The adjusting motor drives the angle of one pull rod to change, causing the other pull rods to simultaneously change angle, thereby achieving the process of two adjacent crossbars moving closer or further apart.

[0008] As a further improvement to the above technical solution, the adjusting motor is mounted on the support frame and a first gear is installed at its output end. The rotating shaft fixed to the support frame is a fixed rotating shaft, and the cross member including the fixed rotating shaft is a fixed cross member. One of the tie rods of the fixed cross member is equipped with a second gear that meshes with the first gear. The number of teeth on the first gear is less than the number of teeth on the second gear. By reducing speed and increasing torque through the first and second gears, the stability and reliability of the relative rotation of the two tie rods can be improved. Furthermore, the adjusting motor is fixed on the support frame, which facilitates installation and positioning.

[0009] As a further improvement to the above technical solution, the second driving component includes first telescopic cylinders respectively installed at both ends of the support frame, with the output ends of the two first telescopic cylinders connected to the two limiting rods respectively. By driving the positions of the two limiting rods with the two second telescopic cylinders respectively, the positions of the two rows of detection probes can be driven independently, resulting in better flexibility and adaptability.

[0010] As a further improvement to the above technical solution, the limiting rod is provided with a second sliding groove, and the detection probes at the same end of the plurality of crossbars are all slidably disposed in the corresponding second sliding grooves. The second sliding groove in the limiting rod guides the sliding direction of the detection probes, resulting in a simple structure that is easy to assemble.

[0011] As a further improvement to the above technical solution, slide rods are installed at both ends of the support frame, and slide blocks are installed at both ends of the crossbar, which are respectively slidably disposed on the slide rods at the corresponding ends. This makes the sliding of the crossbar relative to the support frame more stable and reliable.

[0012] As a further improvement to the above technical solution, a conveyor belt mechanism is also included. The conveyor belt mechanism is vertically equipped with a second telescopic cylinder, the output end of which is connected to the support frame. The support frame is equipped with a guide cylinder, and the conveyor belt mechanism is equipped with a guide rod for the guide cylinder to slide vertically. After the battery is transported to the workstation via the conveyor belt mechanism, the second telescopic cylinder drives the support frame to move stably downwards, performing battery testing and improving the level of automation.

[0013] As a further improvement to the above technical solution, a first vision camera for identifying information on the top of the battery is installed on the top of the conveyor belt mechanism, and a second vision camera for identifying information on the side of the battery is installed on the side of the conveyor belt mechanism. The first drive unit, the second drive unit, and the second telescopic cylinder are all electrically connected to the first vision camera and the second vision camera. After identifying various information about the battery through the first and second vision cameras, it is convenient to control the first and second drive units to adjust the position of the detection probe, so that the detection probe is better aligned with the terminal post on the battery cell. At the same time, it is also convenient to use this information about the battery for depth detection, etc.

[0014] As a further improvement to the above technical solution, a linear module for driving the first visual camera to move vertically is installed on the top of the conveyor belt mechanism. During the process of the linear module driving the first visual camera to rise and fall, the focusing process of the first visual camera can be facilitated.

[0015] As a further improvement to the above technical solution, the conveyor belt mechanism is equipped with a ranging sensor for measuring the height difference between the battery and the first vision camera. The ranging sensor, the linear module, and the first vision camera are all electrically connected. Automatic focusing can be achieved by automatically adjusting the height difference between the first vision camera and the battery based on the height information fed back by the ranging sensor. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the support frame in an embodiment of the present utility model; Figure 3 This is a schematic diagram showing the connection between the crossbar and the limiting rod in an embodiment of this utility model; Figure 4 This is a schematic diagram of the slide rod and slide block in an embodiment of this utility model.

[0017] 100. Support frame; 110. Slide rod; 120. Slide seat; 200. Crossbar; 210. First slide groove; 220. Detection probe; 300. Limiting rod; 310. Second slide groove; 400. Cross component; 410. Rotating shaft; 420. Pull rod; 500. Adjusting motor; 510. First gear; 520. Second gear; 600. First telescopic cylinder; 610. Push plate; 700. Conveyor belt mechanism; 710. Second telescopic cylinder; 720. Guide cylinder; 730. Guide rod; 800. First vision camera; 810. Linear module; 820. Distance sensor; 900. Second vision camera. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figure 1-4 A lithium-ion battery fast screening device includes a support frame 100, a crossbar 200, a limiting rod 300, a cross member 400, a first driving member, and a second driving member.

[0023] The support frame 100 includes a top plate and a bottom plate. A through hole is provided in the center of the bottom plate to accommodate other components. Uprights are installed along the edge of the bottom plate, and the top plate is installed on top of the uprights, thereby fixing the top plate and the bottom plate together.

[0024] Multiple crossbars 200 are provided. In this embodiment, six crossbars 200 are provided. The six crossbars are arranged side by side along the front-back direction, which is the first direction. Slide rods 110 are installed on both sides of the bottom of the support frame 100 base plate. The length direction of the slide rods 110 is the front-back direction. Slide seats 120 are installed at the bottom positions of both ends of each crossbar 200. The slide seats 120 on the left side of each crossbar 200 are slidably mounted on the left slide rod 110 along the front-back direction, and the slide seats 120 on the right side of each crossbar 200 are slidably mounted on the right slide rod 110 along the front-back direction, so that each crossbar 200 can stably slide back and forth relative to the support frame 100.

[0025] Each crossbar 200 has a first groove 210 at both its left and right ends. The length direction of the first groove 210 is left and right. A detection probe 220 is slidably disposed within the first groove 210, and the detection probe 220 is connected to a detector. It can be understood that the two detection probes 220 located on opposite sides of the same crossbar 200 are the positive electrode probe and the negative electrode probe, respectively. The positive electrode probe contacts the positive terminal of the battery cell, and the negative electrode probe contacts the negative terminal of the battery cell, enabling the detector to detect various data of the battery cell to determine the health status and consistency of each individual battery cell in the battery pack.

[0026] Two limiting rods 300 are provided. The two limiting rods 300 are positioned on the left and right sides of the crossbar 200, respectively. Each limiting rod 300 has a second sliding groove 310, the length of which is in the front-to-back direction. All detection probes 220 on the left side of the crossbar 200 are slidably mounted in the second sliding groove 310 of the left-side limiting rod 300, and all detection probes 220 on the right side of the crossbar 200 are slidably mounted in the second sliding groove 310 of the right-side limiting rod 300. That is, the position of the limiting rods 300 restricts the left-to-right position of the detection probes 220, but does not restrict their front-to-back position. This ensures that the crossbar 200 and the detection probes 220 mounted on it can move back and forth, while the crossbar 200 does not restrict the left-to-right movement of the detection probes 220.

[0027] Understandably, the first groove 210 penetrates both the upper and lower surfaces of the crossbar 200, and the second groove 310 also penetrates both the upper and lower surfaces of the limiting rod 300, allowing the detection probe 220 to be simultaneously inserted into both the first groove 210 and the second groove 310. Furthermore, two limiting blocks can be provided on the detection probe 220, one of which presses against the top surface of the limiting rod 300, and the other against the bottom surface of the crossbar 200, thus preventing the detection probe 220 from detaching from the range of the first groove 210 and the second groove 310, ensuring the positional stability and reliability of the detection probe 220.

[0028] Each crossbar 200 is equipped with a cross member 400, which includes a pivot 410 and two tie rods 420. The pivot 410 is installed at the middle of the crossbar 200, and the middle parts of the two tie rods 420 are rotatably mounted on the pivot 410. The two tie rods 420 are staggered one above the other and arranged in a cross shape. The ends of the tie rods 420 of two adjacent crossbars 200 are rotatably connected, so that the connection position forms a rhomboid structure (quadrilateral linkage mechanism). When the distance between two adjacent crossbars 200 changes, the distance between the other two adjacent crossbars 200 will also change synchronously. The pivot 410 of the first crossbar 200 in front is fixedly installed on the support frame 100, so that the first crossbar 200 in front is a fixed crossbar fixed on the support frame 100. The cross member 400 installed on the fixed crossbar is a fixed cross member, and the pivot 410 included in the fixed cross member is a fixed pivot. In other embodiments, the pivot 410 of the last crossbar 200 located at the rear may also be fixedly mounted on the support frame 100.

[0029] The first driving component is used to drive the crossbar 200. Specifically, the first driving component includes an adjusting motor 500, a first gear 510, and a second gear 520. The adjusting motor 500 is mounted on the front side of the base plate of the support frame 100. The first gear 510 is mounted on the output end of the adjusting motor 500. The second gear 520 is mounted on the upper pull rod 420 in the fixed cross member, and the axis of the second gear 520 coincides with the axis of the fixed rotating shaft. The second gear 520 meshes with the first gear 510, and the number of teeth of the first gear 510 is less than the number of teeth of the second gear 520, achieving the effect of deceleration and torque increase. The adjusting motor 500 can drive the first gear 510 to rotate, and the first gear 510 drives the second gear 520 to rotate. After the angle of the upper pull rod 420 changes, the distance between two adjacent crossbars 200 is reduced or increased, thereby adjusting the front-to-back distance of the detection probe 220 to adapt to the distance between the upper terminals of two adjacent cells in the battery being processed.

[0030] In other embodiments, the first driving component may also include only an adjusting motor 500, which is mounted on one of the crossbars 200. The output of the adjusting motor 500 is connected to the upper pull rod 420. The adjusting motor 500 can drive one of the pull rods 420 to rotate, pulling or pushing two adjacent crossbars 200 closer or further apart. The other pull rod 420 will also rotate accordingly, thereby adjusting the distance between the two adjacent crossbars 200.

[0031] The second driving component is used to adjust the distance between the two limiting rods 300. Specifically, the second driving component includes two first telescopic cylinders 600, which are located on the left and right sides of the base plate of the support frame 100, respectively. The output ends of the two first telescopic cylinders 600 are arranged opposite each other and equipped with push plates 610. The opposite sides of the two push plates 610 are respectively connected to the opposite sides of the two limiting rods 300, so that the first telescopic cylinders 600 can drive the limiting rods 300 to move left and right, thereby adjusting the left and right position of the detection probe 220.

[0032] The rapid screening device also includes a conveyor belt mechanism 700, a second telescopic cylinder 710, a first vision camera 800, and a second vision camera 900. The conveyor belt mechanism 700 includes a frame and a conveyor belt mounted on the frame. The conveyor belt operates via a drive motor to achieve its conveying function. The first vision camera 800, the conveyor belt mechanism 700, the second telescopic cylinder 710, the first drive component, the second drive component, and the second vision camera are all electrically connected.

[0033] A first bracket is mounted on the front side of the frame, and the first bracket is located at the front end of the conveyor belt mechanism 700. A first vision camera 800 is mounted on the top of the first bracket with the camera end facing downwards, and a second vision camera 900 is mounted on the left side of the first bracket with the camera end facing right.

[0034] The first vision camera 800 captures images of the top of the batteries being transported. After image processing, it can identify the number of cells in the battery pack, cell width, cell terminal spacing and position, and the individual cell traceability code on the cell surface. The second vision camera 900 also captures images of the side of the batteries being transported. After image processing, it can identify the battery pack traceability code. The individual battery pack traceability code is linked to the individual cell traceability code; both are used for battery recording. The individual cell traceability code is generally located on the surface of the top cover of the individual battery cell, while the battery pack traceability code is generally located on the surface of the battery pack side panel.

[0035] A linear module 810 is mounted on the top of the first support. A first vision camera 800 is installed at the output end of the linear module 810. The linear module 810 can move the first vision camera 800 up and down to adjust its height. A distance sensor 820 is also mounted on the top of the first support, in front of the linear module 810. The distance sensor 820 is used to measure the height difference between the top surface of the battery pack and the first vision camera 800. The linear module 810, the distance sensor 820, and the first vision camera 800 are electrically connected. The linear module 810 adjusts the height of the first vision camera 800 based on the focus data of the first vision camera 800 and the feedback signal from the distance sensor 820, thereby achieving automatic focusing. The distance sensor 820 can be a laser distance sensor, a device that uses laser technology for measurement.

[0036] A second support is installed at the rear of the frame, positioned at the rear end of the conveyor belt mechanism 700. A second telescopic cylinder 710 is installed on top of the second support, with its output end facing downwards, passing through the second support and then fixedly connected to the top plate of the support frame 100, allowing the second telescopic cylinder 710 to drive the support frame 100 to move up and down as a whole. Guide rods 730 are installed on both the left and right sides of the second support, and guide cylinders 720 are installed on both the left and right sides of the bottom plate of the support frame 100, allowing the guide rods 730 to pass through. The guide cylinders 720 can slide vertically along the guide rods 730, making the up and down movement of the support frame 100 more stable and reliable.

[0037] The battery pack is placed on the conveyor belt of the conveyor belt mechanism 700. The conveyor belt drives the battery pack to move backward. When it moves to the bottom of the first support, the laser range sensor 820 detects the height of the battery pack and transmits the detection signal to the PLC. The linear module 810 automatically adjusts the height difference between the first vision camera 800 and the surface of the battery pack based on the height signal fed back by the laser range sensor 820 to achieve automatic focusing. The first vision camera 800 transmits the identified cell width, terminal spacing and other information to the PLC. The PLC controls the first and second drive components on the support frame 100 to respond, so that the position of each detection probe is adaptively adjusted to a suitable position to achieve data acquisition compatible with battery packs or cells of different specifications and sizes.

[0038] The conveyor belt mechanism 700 drives the battery pack to move backward. After the limit sensor detects the signal from the battery pack, the battery pack stops moving. At this time, the controllers of the regulating motor 500 and the first telescopic cylinder 600 receive the signal recognized by the first vision camera 800: The first step is to adjust the motor 500 to rotate and drive the crossbar 200 to make equal-distance adjustments, thereby adjusting the distance between the detection probes 220, and adjusting all the detection probes 220 to the width of the battery cell to be tested (front and back direction).

[0039] The second step involves adjusting the positions of the two first telescopic cylinders 600 on both sides of the limit rod 300 to adjust the distance (left and right direction) between the detection probes 220, so that the detection probes 220 move to the position of the corresponding cell electrode.

[0040] Third, the second telescopic cylinder 710 pushes the support frame 100 downward, so that the detection end of the detection probe 220 presses against the cell terminal in the battery pack.

[0041] The fourth step involves the detector starting to work, measuring the voltage and AC impedance values ​​between individual cells to screen for consistency among the cells in the battery pack. The measured data is uploaded to the database and displayed through the PLC and host computer software. The system automatically determines the health status and consistency of each cell in the battery pack.

[0042] Fifth step: After the measurement is completed, the second telescopic cylinder 710 drives the support frame 100 to retract upwards, and the conveyor belt mechanism 700 drives the battery pack to move backwards out of the testing process.

[0043] The embodiments of this application have the following advantages: (1) No manual input of battery model, size and other information is required. The equipment can automatically complete the judgment of battery health status and consistency throughout the process, which can make up for the technical difficulty that existing retired batteries cannot achieve mechanical replacement of manual operation due to large differences in battery models.

[0044] (2) The screening technology is more standardized and compliant. In the traditional battery pack disassembly, the battery pack traceability code and the cell traceability code are collected separately, which can easily cause traceability code confusion. However, this technology realizes the deep binding of the battery pack traceability code and the cell traceability code, making the destination of battery materials more accurate and facilitating the construction of battery data models in the future.

[0045] (3) Traditional battery pack screening technology involves measuring the voltage and internal resistance of each cell. Health status assessment requires disassembling the battery pack into individual cells and then performing charge / discharge tests on each cell, resulting in high disassembly costs and low efficiency. This technology uses AC impedance spectroscopy to measure battery consistency and health status, identifying cells with different impedance spectra for screening. In principle, the impedance spectrum of each cell in the battery pack is consistent; differences in electrical performance will lead to differences in the cell impedance spectra.

[0046] (4) The impedance spectrum of the traditional single-cell AC impedance test method is greatly affected by temperature and SOC value. However, this technology measures the cells in the battery pack simultaneously, and the influence of temperature and SOC value is controllable, which largely makes up for the shortcomings of the AC impedance test method. Therefore, this technology has good applicability. The testing cycle can be reduced to 1 min / pcs battery pack.

[0047] (5) This technology does not require the battery pack to be disassembled into individual cells. The battery pack can be tested directly. After passing the test, the battery pack can be reused directly, which greatly reduces the cost of disassembling the battery pack.

[0048] (6) In the future, the battery traceability code and the battery AC impedance spectrum information will interact to build a large data model library. When there is enough model data, the battery health status SOH value can be compared through the AC impedance spectrum, which will greatly reduce the battery screening time and improve the screening accuracy.

[0049] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rapid screening device for lithium-ion batteries, characterized in that, include: Support frame (100); A number of crossbars (200) are slidably arranged side by side on the support frame (100) along the first direction. A first groove (210) is provided at both ends of the crossbars (200). A detection probe (220) is slidably arranged in the first groove (210) perpendicular to the first direction. A limiting rod (300) is provided at each end of the crossbar (200), and the detection probes (220) at the same end of the multiple crossbars (200) are all slidably disposed on the corresponding end of the limiting rod (300) along the first direction; A cross member (400) is provided on each of the cross bars (200). The cross member (400) includes a pivot (410) mounted on the cross bar (200) and two tie rods (420) rotatably mounted on the pivot (410) and arranged crosswise. The ends of the tie rods (420) on two adjacent cross bars (200) are rotatably connected so that the distance between any two adjacent cross bars (200) can change synchronously. The pivot (410) on one of the cross bars (200) is connected to the support frame (100). A first driving element is used to drive two adjacent crossbars (200) to move closer or further apart relative to each other; The second driving component is used to adjust the position of the two limiting rods (300).

2. The lithium-ion battery rapid screening device according to claim 1, characterized in that: The first drive unit includes an adjusting motor (500) for driving one of the levers (420) to rotate.

3. The lithium-ion battery rapid screening device according to claim 2, characterized in that: The regulating motor (500) is mounted on the support frame (100) and a first gear (510) is mounted on its output end. The rotating shaft (410) fixed on the support frame (100) is a fixed rotating shaft. The cross member (400) including the fixed rotating shaft is a fixed cross member. One of the pull rods (420) of the fixed cross member is equipped with a second gear (520) that meshes with the first gear (510). The number of teeth of the first gear (510) is less than the number of teeth of the second gear (520).

4. The lithium-ion battery rapid screening device according to claim 1, characterized in that: The second driving component includes first telescopic cylinders (600) respectively installed at both ends of the support frame (100), and the output ends of the two first telescopic cylinders (600) are respectively connected to the two limit rods (300).

5. The lithium-ion battery rapid screening device according to claim 1, characterized in that: The limiting rod (300) has a second sliding groove (310), and the detection probes (220) at the same end of the multiple crossbars (200) are all slidably arranged in the second sliding groove (310) at the corresponding end.

6. The lithium-ion battery rapid screening device according to claim 1, characterized in that: Both ends of the support frame (100) are equipped with slide rods (110), and both ends of the crossbar (200) are equipped with slide blocks (120) that are slidably disposed on the corresponding slide rods (110).

7. The lithium-ion battery rapid screening device according to claim 1, characterized in that: It also includes a conveyor belt mechanism (700), on which a second telescopic cylinder (710) is vertically mounted. The output end of the second telescopic cylinder (710) is connected to the support frame (100). The support frame (100) is equipped with a guide cylinder (720), and the conveyor belt mechanism (700) is equipped with a guide rod (730) for the guide cylinder (720) to slide vertically.

8. The lithium-ion battery rapid screening device according to claim 7, characterized in that: The top of the conveyor belt mechanism (700) is equipped with a first vision camera (800) for identifying information on the top of the battery, and the side of the conveyor belt mechanism (700) is equipped with a second vision camera (900) for identifying information on the side of the battery. The first drive member, the second drive member, and the second telescopic cylinder (710) are all electrically connected to the first vision camera (800) and the second vision camera (900).

9. The lithium-ion battery rapid screening device according to claim 8, characterized in that: The top of the conveyor belt mechanism (700) is equipped with a linear module (810) for driving the first vision camera (800) to move vertically.

10. The lithium-ion battery rapid screening device according to claim 9, characterized in that: The conveyor belt mechanism (700) is equipped with a distance sensor (820) for measuring the height difference between the battery and the first vision camera (800). The distance sensor (820), the linear module (810), and the first vision camera (800) are all electrically connected.

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