A lithium battery charge and discharge detection device

Abstract

This invention proposes a lithium battery charge / discharge testing device, belonging to the field of lithium battery testing technology, aiming to solve the problems of low efficiency and difficulty in adapting to large-scale production in existing battery testing methods. It includes a workbench, a vertical frame, a one-way rotation assembly, and a conveyor belt. A rotating shaft is rotatably connected to the top of the workbench, with a top plate fixed at the top of the shaft. Multiple support plates are equidistantly arranged on the side walls of the top plate, and placement plates are mounted on the support plates. A sliding seat is connected to the vertical frame, with a mounting base on the moving seat. A detection head is mounted at the bottom of the mounting base. A lead screw driven by a motor on the vertical frame is threadedly connected to the moving seat. The conveyor belt is connected to both the lead screw and the one-way rotation assembly. When the lead screw reverses, the detection head descends for detection, and the one-way rotation assembly prevents the shaft from rotating. When the lead screw rotates forward, the detection head rises, and the conveyor belt drives the shaft to rotate via the one-way rotation assembly to switch work positions. Multiple placement plates enable parallel "detection-feeding," allowing for advance loading and unloading. Mechanical linkage avoids equipment idleness, improving operational continuity and equipment utilization.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery testing technology, specifically relating to a lithium battery charge and discharge testing device. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Their working principle primarily relies on the migration of lithium ions between the positive and negative electrodes to achieve charging and discharging. With advantages such as high energy density, long cycle life, and low self-discharge rate, they are widely used in consumer electronics, new energy vehicles, and energy storage systems. However, lithium-ion batteries may suffer from problems during manufacturing, such as uneven electrode material coating, electrolyte injection volume deviations, and electrode tab welding defects. Furthermore, during use, overcharging, over-discharging, and overcurrent can easily lead to capacity decay, increased internal resistance, and even safety hazards. Therefore, charge-discharge testing of lithium-ion batteries is essential. During testing, the two probes of a testing instrument are connected to the positive and negative electrodes of the lithium-ion battery, respectively. By applying charging and discharging current and collecting parameters such as voltage, capacity, and internal resistance, the performance and safety standards of the lithium-ion battery can be determined.

[0003] Currently, the industry standard for lithium battery charge / discharge testing is a manually assisted, single-station testing mode. The specific process involves a worker manually securing the lithium battery to be tested onto a fixture, then moving it to the testing station and connecting the testing head. After the testing instrument completes the charge / discharge test, the worker removes the tested lithium battery from the station, and then repeats the process for the next lithium battery to be tested. The disadvantages of this testing method are:

[0004] The testing fixture can only hold one lithium battery at a time. After the test is completed, the tested battery must be removed from the fixture and then a new battery to be tested must be placed in and adjusted and fixed. This alternating process of picking up and putting down generates a lot of invalid time loss, which makes the test unable to be carried out continuously, resulting in extremely low efficiency and making it difficult to meet the batch testing needs of large-scale production. Summary of the Invention

[0005] In view of this, the present invention provides a lithium battery charge and discharge testing device to solve the problem that the battery testing efficiency in the prior art is extremely low and it is difficult to adapt to the batch testing needs of large-scale production.

[0006] The technical solution adopted in this invention is as follows:

[0007] A lithium battery charge / discharge detection device, comprising:

[0008] A workbench, the top of which is rotatably connected to a rotating shaft, the top of which is fixedly connected to a top plate, and the side wall of the top plate is provided with multiple support plates, which are equidistantly spaced along the circumference of the top plate, and each support plate is provided with a plate for preventing the placement of batteries.

[0009] A stand has a movable seat slidably connected to it. A mounting seat is provided at the end of the movable seat away from the stand. A detection head for detecting batteries is provided at the bottom of the mounting seat. The mounting seat is located above one of the placement plates. A lead screw is also rotatably connected to the stand. The lead screw is driven by a motor. The movable seat is threadedly connected to the lead screw.

[0010] A one-way rotation assembly, wherein the one-way rotation assembly is disposed on a rotating shaft;

[0011] A conveyor belt, one end of which is sleeved on a lead screw and the other end of which is sleeved on a one-way rotation assembly. When the lead screw rotates in the forward direction and drives the moving seat to rise, the conveyor belt drives the rotating shaft to rotate through the one-way rotation assembly. When the lead screw rotates in the reverse direction and drives the moving seat to fall, the rotating shaft does not rotate.

[0012] In this technical solution, it should be noted that the workbench, as the overall load-bearing foundation of the device, provides stable support for core components such as the rotating shaft and the upright frame; the rotating shaft can drive the top plate and support plates to rotate synchronously, realizing the cyclic feeding of multiple placement plates; the top plate expands the battery placement space through the circumferential arrangement of support plates to meet the needs of batch testing; the support plates are used to fix the placement plates, ensuring the stability of the placement plates when they rotate with the top plate; the placement plates provide a positioning platform for the batteries; the upright frame provides vertical support for the moving seat and the lead screw, ensuring that the lifting path of the testing head is vertical; the moving seat, as the lifting transmission carrier, can slide along the upright frame and drive the mounting seat and the testing head. The head is raised and lowered synchronously; the mounting base is used to fix the detection head and ensure the alignment accuracy between the detection head and the battery tabs; the detection head conducts charging and discharging current and collects parameters such as voltage and capacity by contacting the positive and negative terminals of the battery; the lead screw is driven by a motor to rotate, converting the circular motion into the linear motion of the moving seat, realizing the precise raising and lowering of the detection head; the motor provides the power source for the entire device, and the lifting and station switching are linked by controlling the forward and reverse rotation; the unidirectional rotation component only allows the shaft to rotate in one direction to avoid station offset during testing; the conveyor belt transmits the rotational power of the lead screw to the unidirectional rotation component, realizing the cross-component transmission of power. Working principle: The operator first places the batteries to be tested on all the placement plates and starts the motor to drive the lead screw to rotate. When the lead screw rotates in the reverse direction, it drives the moving seat and mounting seat to move downward through the threaded transmission. The detection head then approaches the battery on the placement plate below and contacts the tab, initiating the charge and discharge test. At this time, although the conveyor belt rotates in the reverse direction with the lead screw, the one-way rotation component cuts off the power transmission, the shaft remains stationary, and the placement plate is in a stable position. After the test is completed, the motor drives the lead screw to rotate in the forward direction, driving the moving seat and mounting seat to reset upward. At the same time, the conveyor belt rotates in the forward direction with the lead screw, and the one-way rotation component drives the shaft to rotate by one station angle, rotating the tested battery out of the test area. Simultaneously, the placement plate of the next battery to be tested is precisely rotated to be directly under the detection head, and the above lifting and testing actions are repeated. Beneficial effects: By using a multi-plate circumferential arrangement and a rotating feeding design, parallel "detection-feeding" operations are achieved. Workers can load and unload materials in advance at non-detection stations without waiting for individual battery detection to be completed before operation, greatly improving the continuity of operations. Through the mechanical linkage of lead screw lifting and shaft rotation, synchronous response between detection and station switching is achieved, avoiding equipment idleness caused by resetting the detection head and then restarting feeding, making full use of equipment running time and improving overall utilization.

[0013] Preferably, the unidirectional rotation assembly includes a sleeve rotatably connected to a rotating shaft. One end of the conveyor belt is sleeved on the side wall of the sleeve. The top of the sleeve is provided with an annular plate, which surrounds the outside of the rotating shaft. The inner side of the annular plate is provided with a plurality of telescopic columns, which are equidistantly spaced along the circumference of the annular plate. The outer wall of the rotating shaft is provided with a plurality of slots into which the telescopic columns can be inserted. When the lead screw rotates in the forward direction, causing the moving seat to rise, the lead screw drives the sleeve to rotate in the forward direction via the conveyor belt. At this time, the telescopic columns are in an extended state and are inserted into the slots to drive the rotating shaft to rotate in the forward direction. When the lead screw rotates in the reverse direction, causing the moving seat to fall, the telescopic columns can retract to avoid the insertion holes, so that the rotating shaft does not rotate.

[0014] In this technical solution, it should be noted that the sleeve is fitted onto the outside of the rotating shaft, serving as a receiving component for transmitting driving force. It can rotate freely relative to the rotating shaft, achieving separate control of power transmission and shaft rotation. The annular plate is fixed to the top of the sleeve, providing a circumferential mounting carrier for the telescopic column, ensuring precise alignment between the telescopic column and the slot on the rotating shaft. The telescopic column engages or disengages from the slot through its telescopic movement. The slot is located on the outer wall of the rotating shaft, transmitting rotational torque through its engagement with the telescopic column. Working principle: When the lead screw rotates forward, the conveyor belt drives the sleeve to rotate synchronously forward. At this time, the telescopic column is in an extended state and embedded in the slot of the rotating shaft. The sleeve drives the rotating shaft to rotate synchronously forward through the engagement of the telescopic column. When the lead screw rotates in the reverse direction, the conveyor belt drives the sleeve to rotate in the reverse direction. During the reverse rotation, the telescopic column retracts and disengages from the slot, the sleeve rotates freely while the rotating shaft remains stationary. Beneficial effects: Unidirectional transmission is achieved through the mechanical engagement of the telescopic column and the slot, ensuring that the rotating shaft rotates only when the detection head rises and resets, remaining absolutely stationary during the detection process.

[0015] Preferably, the telescopic column includes a fixed cylinder and an insert column. The fixed cylinder is fixed to the inner wall of the annular plate. One end of the insert column is slidably inserted into the fixed cylinder and is connected to the fixed cylinder by a first spring. The other end of the insert column extends outside the fixed cylinder and is inserted into a slot. One end of the insert column inserted into the slot is provided with a guide surface, which is inclined.

[0016] In this technical solution, it should be noted that the fixed cylinder is fixed to the inner wall of the annular plate, providing sliding guidance and a mounting base for the insert; the insert can slide along the axial direction of the fixed cylinder, and power transmission is achieved through the engagement of its end with the slot; the first spring provides continuous extension force for the insert, ensuring stable engagement between the insert and the slot under normal conditions; the guide surface is an inclined structure at the end of the insert, used to guide the insert to retract when the sleeve rotates in the reverse direction. Working principle: Under normal conditions, the first spring is in a naturally extended state, pushing the insert out of the fixed cylinder and into the slot of the rotating shaft; when the sleeve rotates in the reverse direction, the guide surface at the end of the insert contacts the inner wall of the slot and is compressed, the insert overcomes the elastic force of the first spring and retracts back into the fixed cylinder, disengages from the slot, and rotates to the next slot, the insert re-extends under the action of the elastic force of the first spring; when the sleeve rotates in the forward direction again, the other side of the insert does not have a guide surface, so the insert will not retract, but will drive the rotating shaft to rotate. Beneficial effects: Through the ingenious design of the single-sided guide surface, the unidirectional transmission logic of "automatic retraction in reverse rotation and extension in forward rotation" is naturally realized. There is no need to set up additional control switches or transmission locking structures. The guide surface only triggers the retraction action when reversing, and does not interfere with the engagement of the plug and the slot when rotating forward, ensuring stable power transmission. The first spring and the guide surface work together to realize the automatic action of the plug, without the need for manual adjustment, improving the automation and reliability of the device operation.

[0017] Preferably, the top of the placement plate is provided with a groove, and two sliders are slidably connected in the groove. Each slider is provided with a clamping plate at its top, and a clamping space for holding the battery is formed between the two clamping plates. A screw is rotatably connected in the groove, and two opposite external threads are provided on the screw at intervals. The two sliders are respectively threaded to the screw through the two external threads.

[0018] In this technical solution, it should be noted that the slide groove is located at the top of the placement plate, providing a precise sliding track for the slider and restricting its movement to only the lateral direction. The slider slides into the slide groove, and the top is connected to a clamping plate, which is the transmission component that drives the clamping plate to move. The clamping plate is used to directly clamp both sides of the battery, achieving fixation through contact with the battery surface. The screw is laterally rotatably connected within the slide groove and drives the slider to move through a reverse thread, serving as the power transmission component for the clamping action. The reverse external threads are symmetrically arranged on the screw, allowing the two sliders to move synchronously in opposite directions, realizing the opening and closing of the clamping plate. Working principle: When the screw is rotated, since the two sliders engage with the reverse external threads on the screw, the circular motion of the screw is converted into the linear motion of the sliders. The two sliders move towards each other along the slide groove, causing the clamping plates to move closer together and clamp the battery. When the screw is rotated in the opposite direction, the sliders move away from each other, and the clamping plates move away from each other and release the battery. Beneficial effects: The two clamps can hold and fix the battery, preventing it from shifting during testing. The screw and two opposite external threads allow the relative movement of the two clamps to be achieved simply by rotating the screw, driving the clamps to open and close synchronously.

[0019] Preferably, one end of the screw extends out of the groove and is connected to a gear, the gear being connected to the screw via a one-way bearing;

[0020] The mounting base is equipped with a bracket, and a first rack is fixedly connected to the bracket. The first rack is vertically arranged. When the mounting base is lowered, the first rack will contact the gear and drive the gear to rotate counterclockwise. Through the action of the one-way bearing, the counterclockwise rotation of the gear does not drive the screw to rotate. When the mounting base is raised, the first rack drives the gear to rotate clockwise. Through the action of the one-way bearing, the gear drives the screw to rotate clockwise, causing the two clamps to release the battery.

[0021] In this technical solution, it should be noted that the gear meshes with the first rack, converting the vertical motion of the first rack into circular motion; the one-way bearing (containing rollers and wedge grooves internally; when the gear rotates clockwise, the rollers engage with the wedge grooves, driving the screw to rotate synchronously; when the gear rotates counterclockwise, the rollers slide in the grooves, and the gear idles without driving the screw) achieves unidirectional power transmission; the bracket is fixed on the mounting base to support the first rack, ensuring precise meshing between the rack and the gear; the first rack moves synchronously with the lifting and lowering of the mounting base, serving as the power source for driving the gear's rotation. Working principle: When the mounting base lowers, the first rack moves downwards and meshes with the gear, driving the gear to rotate counterclockwise. At this time, the one-way bearing is in an idle state, the gear does not drive the screw to rotate, and the clamping plate maintains its clamping state on the battery; when the mounting base rises, the first rack moves upwards synchronously, driving the gear to rotate clockwise, the one-way bearing locks and drives the screw to rotate synchronously, and the two sliders move in opposite directions under the action of opposing external threads, automatically releasing the battery from the clamping plate. Beneficial effects: By using a first rack, gear, and one-way bearing, when the mounting base moves downward, the rack drives the gear to rotate, but the gear does not drive the screw to rotate due to the one-way bearing. This means it does not affect the clamping of the battery by the two clamping plates. When the battery test is completed, the mounting base moves upward, and the rack drives the gear to rotate clockwise. At this time, the gear drives the screw to rotate, causing the two clamping plates to move and release the battery, achieving automatic battery release without manual operation, saving manual operation time, and further improving the overall testing efficiency.

[0022] Preferably, the placement plate is further provided with a box, and a piston plate is slidably connected inside the box. One end of the piston plate is provided with a piston rod, and one end of the piston rod slides out of the box and is connected to a connecting rod. A second rack is connected to the connecting rod, and the second rack meshes with a gear. The top of the box is provided with a tube communicating with its interior, and a jet nozzle is connected to the tube. The outlet of the jet nozzle faces the battery.

[0023] In this technical solution, it should be noted that the housing provides a sealed space for gas storage and compression; the piston plate slides within the housing, compressing the gas by changing the internal volume of the housing; the piston rod connects the piston plate and the connecting rod, transmitting the power of the second rack to the piston plate; the connecting rod connects the piston rod and the second rack, realizing the directional transmission of power; the second rack meshes with the gear, converting the rotational power of the gear into linear motion; the pipe is used to transport compressed gas, connecting the housing to the nozzle; the nozzle is aimed at the battery surface, converting the compressed gas into a high-speed airflow to blow away impurities. Working principle: When the gear rotates, it meshes with the second rack, causing the second rack to move laterally. The second rack, through the connecting rod, pulls the piston rod and piston plate to slide outwards from the housing, compressing the gas inside the housing. The compressed gas is transported through the pipe to the nozzle, from which a high-speed airflow is ejected, blowing away dust, electrolyte residue, and other impurities from the battery surface. Beneficial effects: By using the second rack, gear, air nozzle, and housing, the air nozzle can be driven to spray gas when the mounting base descends, through the cooperation of the gear and the first rack, to achieve automatic cleaning before battery testing, eliminating the need for manual wiping and avoiding impurities that could cause poor contact between the test head and the electrode tab.

[0024] Preferably, the bottom of the placement plate is provided with a support plate, the top of the support plate is provided with a guide groove, and the bottom of the second rack is provided with a guide rail, which is slidably embedded in the guide groove.

[0025] In this technical solution, it should be noted that the support plate supports the second rack to prevent it from deforming under stress; the guide groove cooperates with the guide rail to restrict the movement direction of the second rack, making the movement of the second rack more stable.

[0026] Preferably, each of the clamping ends of the two clamping plates is provided with an elastic protective pad.

[0027] In this technical solution, it should be noted that the elastic material can increase the fit between the clamp and the battery, improving clamping stability; the protective pad has a certain degree of wear resistance, which can extend the service life of the clamp.

[0028] Preferably, a detector is provided on one side of the workbench, and the detection head is electrically connected to the detector via a wire.

[0029] In this technical solution, it should be noted that the integrated control of the testing process of the testing instrument can uniformly set testing standards to ensure consistency of testing conditions for different batteries; the wire enables a flexible connection between the testing head and the testing instrument, without affecting the lifting and lowering of the testing head and the switching of work positions, ensuring flexible operation of the device; real-time data transmission and analysis can quickly determine whether the battery is qualified, improving the timeliness of testing and judgment.

[0030] Preferably, the upright is provided with a vertical rail, and the movable seat is provided with a guide block that slides with the vertical rail.

[0031] In this technical solution, it should be noted that the vertical rail provides a sliding track for the guide block; the guide block cooperates with the vertical rail to restrict the movement direction of the moving seat.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 1. In this invention, the parallel operation of "detection-feeding" is achieved through the circumferential arrangement of multiple placement plates and the rotary feeding design. Workers can load and unload materials in advance at non-detection stations without waiting for the detection of a single battery to be completed before operation, which greatly improves the continuity of operation. Through the mechanical linkage of lead screw lifting and shaft rotation, the synchronous response of detection and station switching is achieved, avoiding equipment idleness caused by resetting the detection head and then starting feeding, making full use of equipment running time and improving overall utilization.

[0034] 2. In this invention, the ingenious design of the single-sided guide surface naturally realizes the unidirectional transmission logic of "automatic retraction during reverse rotation and extension during forward rotation" of the insertion post. There is no need to set up additional control switches or transmission locking structures. The guide surface only triggers the retraction action when the reverse rotation occurs, and does not interfere with the engagement of the insertion post and the slot when the forward rotation occurs, ensuring stable power transmission. The first spring cooperates with the guide surface to realize the automatic action of the insertion post, which does not require manual adjustment and improves the automation level and reliability of the device operation.

[0035] 3. In this invention, by setting a first rack, gear, and one-way bearing, when the mounting base moves downward, the rack will drive the gear to rotate, but the gear will not drive the screw to rotate due to the action of the one-way bearing. That is, it will not affect the clamping of the battery by the two clamping plates. When the battery test is completed, the mounting base moves upward, and the rack drives the gear to rotate clockwise. At this time, the gear will drive the screw to rotate, causing the two clamping plates to move and release the battery, realizing automatic release of the battery without manual operation, saving manual operation time, and further improving the overall testing efficiency.

[0036] 4. In this invention, the second rack, gear, air nozzle, and housing are designed so that when the mounting base descends, the gear and the first rack work together to drive the air nozzle to spray gas, achieving automatic cleaning before battery testing without the need for manual wiping, thus avoiding impurities causing poor contact between the test head and the tab. Attached Figure Description

[0037] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0038] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0039] Figure 2 This is a three-dimensional structural diagram of the frame and top plate of the present invention;

[0040] Figure 3 for Figure 2 A schematic diagram of an inclined three-dimensional structure;

[0041] Figure 4 This is a three-dimensional structural diagram of the lead screw and rotating shaft of the present invention;

[0042] Figure 5 This is a three-dimensional structural diagram of the rotating shaft of the present invention;

[0043] Figure 6 This is a three-dimensional structural diagram of the telescopic column and rotating shaft of the present invention;

[0044] Figure 7 This is a three-dimensional structural diagram of the telescopic column of the present invention;

[0045] Figure 8 This is a cross-sectional three-dimensional structural schematic diagram of the telescopic column of the present invention;

[0046] Figure 9 This is a three-dimensional structural diagram of the mounting base and placement plate of the present invention;

[0047] Figure 10 This is a three-dimensional structural diagram of the placement plate of the present invention;

[0048] Figure 11 for Figure 9 A schematic diagram of the oblique stereoscopic structure;

[0049] Figure 12 for Figure 11 A frontal view of the three-dimensional structure;

[0050] Figure 13 for Figure 12 A three-dimensional structural diagram of the housing after cross-section, without the first rack in the middle;

[0051] Figure 14 This is a three-dimensional structural diagram of the tube body of the present invention;

[0052] Among them: 1-Detector, 100-Workbench, 200-Upright frame, 201-Lead screw, 202-Motor, 203-Moving seat, 204-Mounting seat, 205-Guide block, 206-Vertical rail, 207-Bracket, 208-First rack, 209-Detection head, 300-Rotating shaft, 301-Top plate, 302-Support plate, 400-Placement plate, 401-Clamping plate, 402-Screw, 403-External thread, 404-Slide groove, 405-Protective pad, 500-Battery, 6 00-Conveyor belt, 700-Sleeve, 701-Annular plate, 702-Telescopic column, 7021-Fixed cylinder, 7022-Insertion column, 7023-Guide surface, 7024-First spring, 703-Slot, 800-Gear, 801-Second rack, 802-Connecting rod, 803-Guide rail, 804-Guide groove, 805-Support plate, 806-Guide bearing, 900-Box, 901-Pipe body, 902-Piston plate, 903-Piston rod, 904-Jet head. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0056] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0059] Example 1

[0060] like Figures 1-14 As shown in the figure, an embodiment of the present invention discloses a lithium battery charge and discharge detection device, comprising:

[0061] A workbench 100 is rotatably connected to the top of the workbench 100, and a top plate 301 is fixedly connected to the top of the top plate 300. Multiple support plates 302 are provided on the side wall of the top plate 301. The multiple support plates 302 are equidistantly arranged along the circumference of the top plate 301. Each support plate 302 is provided with a placement plate 400 for preventing the battery 500 from being placed.

[0062] A support frame 200 is provided, on which a movable seat 203 is slidably connected. At the end of the movable seat 203 away from the support frame 200, a mounting seat 204 is provided. At the bottom of the mounting seat 204, a detection head 209 for detecting the battery 500 is provided. The mounting seat 204 is located above one of the placement plates 400. A lead screw 201 is also rotatably connected to the support frame 200. The lead screw 201 is driven by a motor 202. The movable seat 203 is threadedly connected to the lead screw 201.

[0063] A one-way rotation component, wherein the one-way rotation component is disposed on the rotating shaft 300;

[0064] A conveyor belt 600 is provided, with one end of the conveyor belt 600 sleeved on a lead screw 201 and the other end sleeved on a one-way rotation assembly. When the lead screw 201 rotates in the forward direction, causing the moving seat 203 to rise, the conveyor belt 600 drives the rotating shaft 300 to rotate through the one-way rotation assembly. When the lead screw 201 rotates in the reverse direction, causing the moving seat 203 to fall, the rotating shaft 300 does not rotate.

[0065] It should be noted that the workbench 100, as the overall load-bearing foundation of the device, provides stable support for core components such as the rotating shaft 300 and the upright frame 200. The rotating shaft 300 can drive the top plate 301 and the support plate 302 to rotate synchronously, realizing the cyclic feeding of multiple placement plates 400. The top plate 301 expands the placement space of the battery 500 by circumferentially arranging the support plate 302 to meet the batch testing requirements. The support plate 302 is used to fix the placement plate 400, ensuring that the placement plate 400 is stable in position when rotating with the top plate 301. The placement plate 400 provides a positioning platform for the battery 500. The upright frame 200 provides vertical support for the moving seat 203 and the lead screw 201, ensuring that the lifting path of the testing head 209 is vertical. The moving seat 203, as the lifting transmission carrier, can slide along the upright frame 200 and drive the battery 500 to rotate. The mounting base 204 and the detection head 209 move up and down synchronously. The mounting base 204 is used to fix the detection head 209 and ensure the alignment accuracy between the detection head 209 and the battery 500 tabs. The detection head 209 conducts the charging and discharging current and collects parameters such as voltage and capacity by contacting the positive and negative terminals of the battery 500. The lead screw 201 is driven to rotate by the motor 202, which converts the circular motion into the linear motion of the moving base 203, so as to achieve precise lifting and lowering of the detection head 209. The motor 202 provides the power source for the entire device and realizes the linkage between lifting and station switching by controlling forward and reverse rotation. The unidirectional rotation component only allows the shaft 300 to rotate in one direction to avoid station offset during testing. The conveyor belt 600 transmits the rotational power of the lead screw 201 to the unidirectional rotation component, realizing the cross-component transmission of power. Working principle: The operator first places the batteries 500 to be tested on all the placement plates 400, and starts the motor 202 to drive the lead screw 201 to rotate. When the lead screw 201 rotates in the reverse direction, it drives the moving seat 203 and the mounting seat 204 to move downward through the threaded transmission. The detection head 209 then approaches the battery 500 on the lower placement plate 400 and contacts the tab, starting the charge and discharge test. At this time, although the conveyor belt 600 rotates in the reverse direction with the lead screw 201, the one-way rotation component cuts off the power transmission, the rotating shaft 300 remains stationary, and the placement plate 400 is in a stable position. After the test is completed, the motor 202 drives the lead screw 201 to rotate in the forward direction, driving the moving seat 203 and the mounting seat 204 to reset upward. At the same time, the conveyor belt 600 rotates in the forward direction with the lead screw 201, and drives the rotating shaft 300 to rotate by one station angle through the one-way rotation component, rotating the tested battery 500 out of the test area. At the same time, the placement plate 400 of the next battery 500 to be tested is precisely rotated to directly below the detection head 209, and the above lifting and testing actions are repeated.Beneficial effects: By using a multi-plate 400 circumferential arrangement and a rotating feeding design, parallel "detection-feeding" operations are achieved. Workers can load and unload materials in advance at non-detection stations without waiting for the detection of a single battery 500 to be completed before operation, greatly improving the continuity of operations. Through the mechanical linkage of the lifting of the lead screw 201 and the rotation of the rotating shaft 300, the detection and station switching are synchronized, avoiding equipment idleness caused by the reset of the detection head 209 and the restart of feeding, making full use of equipment running time and improving overall utilization.

[0066] like Figure 1 As shown, in this embodiment, a detector 1 is provided on one side of the workbench 100, and the detection head 209 is electrically connected to the detector 1 via a wire. It should be noted that the detector 1 integrates the control of the detection process, allowing for unified setting of detection standards to ensure consistency in detection conditions for different batteries 500; the wire enables a flexible connection between the detection head 209 and the detector 1, without affecting the lifting and lowering of the detection head 209 or its switching between workstations, ensuring flexible operation of the device; real-time data transmission and analysis allow for rapid determination of whether the battery 500 is qualified, improving the timeliness of the detection judgment.

[0067] like Figure 1 As shown, in this embodiment, the support frame 200 is provided with a vertical rail 206, and the movable seat 203 is provided with a guide block 205 that slides with the vertical rail 206. It should be noted that the vertical rail 206 provides a sliding track for the guide block 205; the guide block 205 cooperates with the vertical rail 206 to restrict the movement direction of the movable seat 203.

[0068] Example 2

[0069] like Figures 4-8As shown, this embodiment is largely the same as the above embodiment, except that the unidirectional rotation assembly includes a sleeve 700 rotatably connected to the rotating shaft 300. One end of the conveyor belt 600 is sleeved on the side wall of the sleeve 700. The top of the sleeve 700 is provided with an annular plate 701, which surrounds the outside of the rotating shaft 300. A plurality of telescopic columns 702 are provided on the inner side of the annular plate 701, and the telescopic columns 702 are equidistantly spaced along the circumference of the annular plate 701. The rotating shaft 300... The outer wall is provided with several slots 703 for the telescopic column 702 to be inserted into. When the lead screw 201 rotates in the forward direction and drives the moving seat 203 to rise, the lead screw 201 drives the sleeve 700 to rotate in the forward direction through the conveyor belt 600. At this time, the telescopic column 702 is in an extended state and is inserted into the slot 703 to drive the rotating shaft 300 to rotate in the forward direction. When the lead screw 201 rotates in the reverse direction and drives the moving seat 203 to fall, the telescopic column 702 can be retracted to avoid the insertion hole, so that the rotating shaft 300 does not rotate. It should be noted that the sleeve 700 is fitted on the outside of the rotating shaft 300 and serves as the power receiver for the conveyor belt 600. It can rotate freely relative to the rotating shaft 300, realizing the separation control of power transmission and rotation of the rotating shaft 300. The annular plate 701 is fixed on the top of the sleeve 700, providing a circumferential mounting carrier for the telescopic column 702, ensuring that the telescopic column 702 is precisely aligned with the slot 703 on the rotating shaft 300. The telescopic column 702 achieves engagement or disengagement with the slot 703 through telescopic movement. The slot 703 is opened on the outer wall of the rotating shaft 300 and transmits rotational torque through engagement with the telescopic column 702. Working principle: When the lead screw 201 rotates in the forward direction, the conveyor belt 600 drives the sleeve 700 to rotate synchronously in the forward direction. At this time, the telescopic column 702 is in an extended state and is embedded in the slot 703 of the rotating shaft 300. The sleeve 700 drives the rotating shaft 300 to rotate synchronously in the forward direction through the engagement of the telescopic column 702. When the lead screw 201 rotates in the reverse direction, the conveyor belt 600 drives the sleeve 700 to rotate in the reverse direction. During the reverse rotation, the telescopic column 702 retracts and disengages from the slot 703, the sleeve 700 rotates freely while the rotating shaft 300 remains stationary. Beneficial effect: Unidirectional transmission is achieved through the mechanical engagement of the telescopic column 702 and the slot 703, so that the rotating shaft 300 only rotates when the detection head 209 rises and resets, remaining absolutely stationary during the detection process.

[0070] like Figures 7-8As shown, in this embodiment, the telescopic column 702 includes a fixed cylinder 7021 and an insertion column 7022. The fixed cylinder 7021 is fixed on the inner wall of the annular plate 701. One end of the insertion column 7022 is slidably inserted into the fixed cylinder 7021, and the insertion column 7022 is connected to the fixed cylinder 7021 by a first spring 7024. The other end of the insertion column 7022 extends outside the fixed cylinder 7021 and is inserted into the slot 703. One end of the insertion column 7022 inserted into the slot 703 is provided with a guide surface 7023, and the guide surface 7023 is inclined. It should be noted that the fixed cylinder 7021 is fixed to the inner wall of the annular plate 701, providing a sliding guide and mounting base for the insert 7022; the insert 7022 can slide along the axial direction of the fixed cylinder 7021, and power transmission is achieved through the engagement of its end with the slot 703; the first spring 7024 provides a continuous extension force for the insert 7022, ensuring that the insert 7022 and the slot 703 are stably engaged under normal conditions; the guide surface 7023 is an inclined structure at the end of the insert 7022, used to guide the insert 7022 to retract when the sleeve 700 rotates in the opposite direction. Working principle: Under normal conditions, the first spring 7024 is in a naturally extended state, pushing the insert 7022 out of the fixed cylinder 7021 and into the slot 703 of the rotating shaft 300; when the sleeve 700 rotates in the reverse direction, the guide surface 7023 at the end of the insert 7022 contacts the inner wall of the slot 703 and is compressed, the insert 7022 overcomes the elastic force of the first spring 7024 and retracts back into the fixed cylinder 7021, disengages from the slot 703, and rotates to the next slot 703, the insert 7022 re-extends under the elastic force of the first spring 7024; when the sleeve 700 rotates in the forward direction again, the other side of the insert 7022 does not have a guide surface 7023, so the insert 7022 will not retract, but will drive the rotating shaft 300 to rotate. Beneficial effects: Through the ingenious design of the single-sided guide surface 7023, the unidirectional transmission logic of "automatic retraction in reverse rotation and extension in forward rotation" is naturally realized. There is no need to set up additional control switches or transmission locking structures. The guide surface 7023 only triggers the retraction action when reversing, and does not interfere with the engagement of the insertion post 7022 and the slot 703 when rotating forward, ensuring stable power transmission. The first spring 7024 works with the guide surface 7023 to realize the automatic action of the insertion post 7022 without manual adjustment, improving the automation level and reliability of the device operation.

[0071] Example 3

[0072] like Figure 10As shown, this embodiment is largely the same as the above embodiment, except that the top of the placement plate 400 is provided with a sliding groove 404, and two sliders are slidably connected in the sliding groove 404. Each slider is provided with a clamping plate 401 at its top, and a clamping space for clamping the battery 500 is formed between the two clamping plates 401. A screw 402 is rotatably connected in the sliding groove 404, and two opposite external threads 403 are provided on the screw 402 at intervals. The two sliders are respectively threaded to the screw 402 through the two external threads 403. It should be noted that the slide groove 404 is formed on the top of the placement plate 400, providing a precise sliding track for the slider and restricting the slider to move only laterally; the slider slides in cooperation with the slide groove 404, and the top is connected to the clamping plate 401, which is the transmission component that drives the clamping plate 401 to move; the clamping plate 401 is used to directly clamp both sides of the battery 500, and is fixed by contact with the surface of the battery 500; the screw 402 is laterally rotatably connected in the slide groove 404, and drives the slider to move through the reverse thread, which is the power transmission component for the clamping action; the reverse external thread 403 is symmetrically arranged on the screw 402, which allows the two sliders to move synchronously in opposite directions, realizing the opening and closing of the clamping plate 401. Working principle: When the screw 402 is rotated, the two sliders engage with the opposing external threads 403 on the screw 402, converting the circular motion of the screw 402 into the linear motion of the sliders. The two sliders move towards each other along the groove 404, causing the clamping plates 401 to move closer together and clamp the battery 500. When the screw 402 is rotated in the opposite direction, the sliders move away from each other, and the clamping plates 401 move away from each other and release the battery 500. Beneficial effects: The two clamping plates 401 can clamp and fix the battery 500, preventing the battery 500 from shifting position during testing. The screw 402 and the two opposing external threads 403 allow the relative movement of the two clamping plates 401 to be achieved simply by rotating the screw 402, driving the clamping plates 401 to open and close synchronously.

[0073] like Figures 11-12As shown, in this embodiment, one end of the screw 402 extends out of the slide groove 404 and is connected to a gear 800. The gear 800 is connected to the screw 402 via a one-way bearing. The mounting base 204 is provided with a bracket 207, and a first rack 208 is fixedly connected to the bracket 207. The first rack 208 is vertically arranged. When the mounting base 204 descends, the first rack 208 contacts the gear 800 and drives the gear 800 to rotate counterclockwise. Due to the action of the one-way bearing, the counterclockwise rotation of the gear 800 does not drive the screw 402 to rotate. When the mounting base 204 rises, the first rack 208 drives the gear 800 to rotate clockwise. Due to the action of the one-way bearing, the gear 800 drives the screw 402 to rotate clockwise, causing the two clamps 401 to release the battery 500. It should be noted that gear 800 meshes with the first rack 208, converting the vertical motion of the first rack 208 into circular motion; a one-way bearing (containing rollers and wedge grooves inside; when gear 800 rotates clockwise, the rollers engage with the wedge grooves, driving the screw 402 to rotate synchronously; when gear 800 rotates counterclockwise, the rollers slide in the grooves, and gear 800 idles without driving the screw 402) achieves one-way power transmission; bracket 207 is fixed on mounting base 204 to support the first rack 208, ensuring precise meshing between the rack and gear 800; the first rack 208 moves synchronously with the lifting and lowering of mounting base 204, serving as the power source for driving the rotation of gear 800. Working principle: When the mounting base 204 descends, the first rack 208 moves down and meshes with the gear 800, causing the gear 800 to rotate counterclockwise. At this time, the one-way bearing is in an idle state, and the gear 800 does not drive the screw 402 to rotate. The clamping plate 401 maintains the clamping state of the battery 500. When the mounting base 204 rises, the first rack 208 moves up synchronously, causing the gear 800 to rotate clockwise. The one-way bearing locks and drives the screw 402 to rotate synchronously. The two sliders move in opposite directions under the action of the reverse external thread 403, and the clamping plate 401 automatically releases the battery 500. Beneficial effects: By using the first rack 208, gear 800, and one-way bearing, when the mounting base 204 moves downward, although the rack drives the gear 800 to rotate, the gear 800 will not drive the screw 402 to rotate due to the one-way bearing. This means that it will not affect the clamping of the battery 500 by the two clamping plates 401. When the battery 500 is tested, the mounting base 204 moves upward, and the rack drives the gear 800 to rotate clockwise. At this time, the gear 800 will drive the screw 402 to rotate, causing the two clamping plates 401 to move and release the battery 500. This achieves automatic release of the battery 500 without manual operation, saving manual operation time and further improving the overall testing efficiency.

[0074] like Figure 10As shown, in this embodiment, each of the clamping ends of the two clamping plates 401 is provided with an elastic protective pad 405. It should be noted that the elastic material can increase the fit between the clamping plate 401 and the battery 500, and improve the clamping stability; the protective pad 405 has a certain wear resistance, which can extend the service life of the clamping plate 401.

[0075] Example 4

[0076] like Figures 13-14 As shown, this embodiment is largely the same as the above embodiment, except that the placement plate 400 is also provided with a box 900, a piston plate 902 is slidably connected inside the box 900, a piston rod 903 is provided at one end of the piston plate 902, one end of the piston rod 903 slides out of the box 900 and is connected to a connecting rod 802, a second rack 801 is connected to the connecting rod 802, and the second rack 801 meshes with the gear 800; the top of the box 900 is provided with a tube 901 communicating with its interior, and a jet nozzle is connected to the tube 901, with the air outlet of the jet nozzle facing the battery 500. It should be noted that the housing 900 provides a sealed space for gas storage and compression; the piston plate 902 slides within the housing 900, achieving gas compression by changing the internal volume of the housing 900; the piston rod 903 connects the piston plate 902 and the connecting rod 802, transmitting the power of the second rack 801 to the piston plate 902; the connecting rod 802 connects the piston rod 903 and the second rack 801, realizing the directional transmission of power; the second rack 801 meshes with the gear 800, converting the rotational power of the gear 800 into linear motion; the pipe 901 is used to transport compressed gas, connecting the housing 900 to the nozzle; the nozzle is aimed at the surface of the battery 500, converting the compressed gas into a high-speed airflow to blow away impurities. Working principle: When gear 800 rotates, it meshes with the second rack 801, causing the second rack 801 to move laterally. The second rack 801, through connecting rod 802, pulls piston rod 903 and piston plate 902 to slide outwards from the housing 900, compressing the gas inside the housing 900. The compressed gas is then transported to the nozzle through pipe 901, from which a high-speed airflow is ejected, blowing away dust, electrolyte residue, and other impurities from the surface of battery 500. Beneficial effects: By configuring the second rack 801, gear 800, nozzle, and housing 900, when the mounting base 204 descends, the gear 800 and the first rack 208 work together to drive the nozzle to eject gas, achieving automatic cleaning of the battery 500 before testing. This eliminates the need for manual wiping and prevents impurities from causing poor contact between the detection head 209 and the tab.

[0077] like Figure 11As shown, in this embodiment, the bottom of the placement plate 400 is provided with a support plate 805, the top of the support plate 805 is provided with a guide groove 804, and the bottom of the second rack 801 is provided with a guide rail 803, which is slidably embedded in the guide groove 804. It should be noted that the support plate 805 supports the second rack 801 to prevent it from deforming under stress; the guide groove 804 cooperates with the guide rail 803 to restrict the movement direction of the second rack 801, making the movement of the second rack 801 more stable.

[0078] The working principle of this invention is as follows: First, the operator places the battery 500 to be tested between the two clamping plates 401 of each placement plate 400. Then, the screw 402 is rotated. Since the reverse external thread 403 on the screw 402 meshes with the two sliders respectively, the sliders move towards each other along the slide groove 404, causing the clamping plates 401 to clamp the battery 500. Next, the motor 202 is started to drive the lead screw 201 to rotate. When the lead screw 201 rotates in the reverse direction, the moving seat 203 slides downwards under the cooperation of the vertical rail 206 and the guide block 205 of the upright frame 200, causing the mounting seat 204 and the testing head 209 to descend synchronously. The first rack 208 on the mounting seat 204 moves downwards accordingly and meshes with the gear 800 on the placement plate 400. When the screw 800 rotates counterclockwise, it drives the gear 800 to rotate. Since the gear 800 is connected to the screw 402 via a one-way bearing, the one-way bearing rotates freely, and the screw 402 does not rotate. The clamping plate 401 maintains its clamping state on the battery 500. At the same time, the gear 800 drives the second rack 801 to move. The second rack 801 pulls the piston rod 903 and piston plate 902 through the connecting rod 802, compressing the gas inside the housing 900. The gas is then ejected from the nozzle through the pipe 901 to clean the surface of the battery 500. After the detection head 209 continues to descend until it contacts the positive and negative terminals of the battery 500, the detector 1 begins charging and discharging detection via wires. Meanwhile, during the reverse rotation of the lead screw 201, the lead screw 20... 1. Reverse rotation drives the conveyor belt 600 and sleeve 700 to rotate in the opposite direction. The insertion post 7022 of the telescopic column 702 on the sleeve 700 is squeezed due to the contact between the end guide surface 7023 and the inner wall of the slot 703 of the rotating shaft 300, compressing the first spring 7024 and retracting it back to the fixed cylinder 7021. The sleeve 700 rotates freely, the rotating shaft 300 remains stationary, and the position of the placement plate 400 is stable. After the test is completed, the motor 202 drives the lead screw 201 to rotate in the forward direction. The moving seat 203 drives the mounting seat 204 and the detection head 209 to rise. The first rack 208 moves upward, driving the gear 800 to rotate clockwise. The one-way bearing locks and drives the screw 402 to rotate. The reverse external thread 403 causes the slider to move along the slide groove 40. 4. The clamping plate 401 releases the battery 500, while the lead screw 201 rotates forward, driving the sleeve 700 to rotate forward via the conveyor belt 600. The insertion post 7022 of the telescopic column 702, without the guide surface 7023, is attached to the slot 703. Under the action of the first spring 7024, it is kept extended and embedded in the slot 703, driving the rotating shaft 300 to rotate one station angle, rotating the tested battery 500 out of the testing area. At the same time, the placement plate 400 of the next battery 500 to be tested is accurately moved to directly below the testing head 209. Then, the cycle of the lead screw 201 rotating in the opposite direction, the testing head 209 descending for cleaning and testing, and the lead screw 201 rotating forward to reset and switch stations is repeated.

[0079] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The scope of protection of this invention does not involve any improvement to the software and methods.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0081] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lithium battery charge / discharge detection device, characterized in that, include: A workbench (100) is rotatably connected to a rotating shaft (300) at its top. A top plate (301) is fixedly connected to the top of the rotating shaft (300). Multiple support plates (302) are provided on the side wall of the top plate (301). The multiple support plates (302) are equidistantly spaced along the circumference of the top plate (301). Each support plate (302) is provided with a placement plate (400) for placing a battery (500). A support frame (200) is provided with a movable seat (203) slidably connected to the support frame (200). A mounting seat (204) is provided at one end of the movable seat (203) away from the support frame (200). A detection head (209) for detecting the battery (500) is provided at the bottom of the mounting seat (204). The mounting seat (204) is located above one of the placement plates (400). A lead screw (201) is also rotatably connected to the support frame (200). The lead screw (201) is driven by a motor (202). The movable seat (203) is threadedly connected to the lead screw (201). A one-way rotation assembly, wherein the one-way rotation assembly is disposed on a rotating shaft (300); A conveyor belt (600) is attached to a lead screw (201) at one end and to a one-way rotation assembly at the other end. When the lead screw (201) rotates in the forward direction and drives the moving seat (203) to rise, the conveyor belt (600) drives the rotating shaft (300) to rotate through the one-way rotation assembly. When the lead screw (201) rotates in the reverse direction and drives the moving seat (203) to fall, the rotating shaft (300) does not rotate. The top of the placement plate (400) is provided with a groove (404), and two sliders are slidably connected in the groove (404). Each slider is provided with a clamping plate (401) at its top. A clamping space for clamping the battery (500) is formed between the two clamping plates (401). A screw (402) is rotatably connected in the groove (404). Two opposite external threads (403) are provided on the screw (402) at intervals. The two sliders are respectively threaded to the screw (402) through the two external threads (403). One end of the screw (402) extends out of the slide groove (404) and is connected to a gear (800). The gear (800) is connected to the screw (402) through a one-way bearing. A bracket (207) is provided on the mounting base (204), and a first rack (208) is fixedly connected to the bracket (207). The first rack (208) is vertically arranged. When the mounting base (204) descends, the first rack (208) contacts the gear (800) and drives the gear (800) to rotate counterclockwise. Through the action of the one-way bearing, the counterclockwise rotation of the gear (800) does not drive the screw (402) to rotate. When the mounting base (204) rises, the first rack (208) drives the gear (800) to rotate clockwise. Through the action of the one-way bearing, the gear (800) drives the screw (402) to rotate clockwise, causing the two clamps (401) to release the battery (500). The placement plate (400) is also provided with a box (900), and a piston plate (902) is slidably connected inside the box (900). One end of the piston plate (902) is provided with a piston rod (903). One end of the piston rod (903) slides out of the box (900) and is connected to a connecting rod (802). A second rack (801) is connected to the connecting rod (802). The second rack (801) meshes with the gear (800). The top of the box (900) is provided with a tube (901) communicating with its interior. A jet nozzle is connected to the tube (901). The outlet of the jet nozzle faces the battery (500).

2. The lithium battery charge / discharge detection device according to claim 1, characterized in that, The unidirectional rotation assembly includes a sleeve (700) rotatably connected to a rotating shaft (300), one end of the conveyor belt (600) being sleeved on the side wall of the sleeve (700), the top of the sleeve (700) being provided with an annular plate (701), the annular plate (701) surrounding the outside of the rotating shaft (300), and the inner side of the annular plate (701) being provided with a plurality of telescopic columns (702), the plurality of telescopic columns (702) being equidistantly spaced along the circumference of the annular plate (701); The outer wall of the rotating shaft (300) is provided with a number of slots (703) into which the telescopic column (702) can be inserted. When the lead screw (201) rotates in the forward direction and drives the moving seat (203) to rise, the lead screw (201) drives the sleeve (700) to rotate in the forward direction through the conveyor belt (600). At this time, the telescopic column (702) is in the extended state and is inserted into the slot (703) to drive the rotating shaft (300) to rotate in the forward direction. When the lead screw (201) rotates in the opposite direction and drives the moving seat (203) to descend, the telescopic column (702) can retract to avoid the insertion hole, so that the rotating shaft (300) does not rotate.

3. The lithium battery charge / discharge detection device according to claim 2, characterized in that, The telescopic column (702) includes a fixed cylinder (7021) and an insert (7022). The fixed cylinder (7021) is fixed on the inner wall of the annular plate (701). One end of the insert (7022) is slidably inserted into the fixed cylinder (7021) and is connected to the fixed cylinder (7021) by a first spring (7024). The other end of the insert (7022) extends outside the fixed cylinder (7021) and is inserted into the slot (703). One end of the insert (7022) inserted into the slot (703) is provided with a guide surface (7023), which is inclined.

4. The lithium battery charge / discharge detection device according to claim 1, characterized in that, The bottom of the placement plate (400) is provided with a support plate (805), the top of the support plate (805) is provided with a guide groove (804), and the bottom of the second rack (801) is provided with a guide rail (803), which is slidably embedded in the guide groove (804).

5. The lithium battery charge / discharge detection device according to claim 1, characterized in that, The clamping ends of the two clamping plates (401) are each provided with elastic protective pads (405).

6. The lithium battery charge / discharge detection device according to claim 1, characterized in that, A detector (1) is provided on one side of the workbench (100), and the detector head (209) is electrically connected to the detector (1) via a wire.

7. The lithium battery charge / discharge detection device according to claim 1, characterized in that, The upright frame (200) is provided with a vertical rail (206), and the movable seat (203) is provided with a guide block (205) that slides with the vertical rail (206).

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