A detection device and method for lithium batteries

Abstract

The application provides a detection device and method for lithium batteries, and belongs to the technical field of lithium battery detection. The device and method solve the problem that the lithium battery puncture detection technology in the prior art relies on manual replacement of the battery in the detection station, and cannot meet the needs of the large-scale development of the new energy industry in terms of detection efficiency, batch adaptation capability and operation safety. The device comprises a top plate, the top plate is provided with a box body, a plurality of placement boxes containing batteries are stacked from top to bottom in the box body, the bottom of the box body is provided with a pushing opening and a discharging opening, and the width end is provided with an opening; the top plate is provided with a sliding groove, the sliding groove is provided with a sliding plate, the top of the sliding plate is provided with a hinged plate, and the hinged plate is a pushing plate; the top plate is further provided with a mounting plate, the mounting plate is provided with a puncture needle opposite to the puncture opening, and the mounting plate is driven to move close to / distance from the opening by a second drive. The device realizes automatic feeding and discharging through component cooperation, and manual operation is not required to complete the "old box discharging-new box replacing". The hinged design of the pushing plate can automatically avoid collision, and the pushing-avoiding-resetting action is connected.

Description

Technical Field

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

[0002] Against the backdrop of the rapid development of the new energy industry, lithium batteries have become a core energy component in electric vehicles, energy storage systems, and portable electronic devices due to their high energy density and long cycle life. However, during the production, storage, transportation, and application of lithium batteries, they are susceptible to fire and explosion risks due to factors such as internal short circuits and mechanical impacts. Therefore, safety testing of lithium batteries is a crucial step in ensuring their large-scale application.

[0003] The puncture test, a core component of lithium battery safety testing, simulates the extreme scenario of a lithium battery being punctured by a sharp object. It observes whether the battery leaks, catches fire, or explodes, thus determining its safety performance level. Currently, the lithium battery puncture testing technology used in the industry is significantly reliant on manual operation: before testing begins, workers must manually move the battery to be tested to the testing station (dedicated workbench) and manually adjust the positioning structure to fix the battery in the designated testing area to prevent displacement during puncture. Then, the equipment uses cylinders or electric cylinders to extend and retract, driving a metal needle to insert into the battery at a preset speed and depth, completing the puncture test. After a single battery is tested, workers must stop the machine and wait for the needle to reset before manually removing the battery fixing structure and taking off the tested battery. Only then can the next battery be manually moved to the testing station, and the positioning and fixing process repeated before starting the next round of testing.

[0004] The existing technical solutions have insurmountable technical limitations: the core problem is that battery replacement at the testing station relies entirely on manual operation. Each battery test requires manual intervention to complete the entire process of removing the old battery and placing the new battery, resulting in long intervals between individual battery tests and low overall testing efficiency, which cannot meet the needs of batch testing of lithium batteries in large-scale production scenarios. Summary of the Invention

[0005] In view of this, the present invention provides a testing device and testing method for lithium batteries to solve the problem that the existing lithium battery puncture testing technology, which relies on manual replacement of batteries at the testing station, cannot meet the needs of the large-scale development of the new energy industry in terms of testing efficiency, batch adaptability and operational safety.

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

[0007] A lithium battery testing device includes a top plate with a housing on the top plate. Several placement boxes are stacked sequentially from top to bottom within the housing, each containing a battery. A puncture hole is provided through one side of each placement box. A push-out port and a discharge port are respectively provided at both ends of the bottom of the housing along its length. The height of the discharge port is approximately equal to the height of the placement box. An opening is provided at one end of the housing along its width. A sliding groove is provided through the top plate, located below the housing and extending along the length of the top plate. A sliding plate is slidably embedded within the groove. The sliding plate is driven by a first driving device to reciprocate along the length of the groove. A hinge plate is provided at the top of the sliding plate, and a push-out plate is hinged to the hinge plate. The top of the push-out plate is higher than the bottom of the placement box, and one end of the push-out plate abuts against the top of the sliding plate. The top plate also includes a mounting plate with needles opposite the puncture hole. The mounting plate is driven by a second driving device to move towards or away from the opening.

[0008] In this technical solution, it should be noted that the top plate provides basic support for the entire device, bearing all components such as the housing, slide plate, and mounting plate; the housing is the container for the placement boxes, limiting the movement of multiple overlapping placement boxes to prevent them from shifting; the placement box is used to individually hold the battery to be tested, achieving independent battery positioning and avoiding mutual interference between batteries; the puncture port provides a puncture channel for the puncture needle, ensuring that the puncture needle can accurately align with the battery; the push port is the entrance for the push plate to extend into the housing and push the placement box, and the discharge port is the discharge channel for the placement box after testing, its height being equivalent to that of the placement box to ensure smooth discharge; the opening provides space for the mounting plate to move the puncture needle close to the placement box, avoiding obstruction by the housing; and the slide groove restricts the slide plate. The sliding direction ensures stable movement of the slide plate along the length of the top plate; the slide plate is the mounting carrier for the pusher plate, and the pusher plate moves by sliding; the first drive device provides power for the reciprocating movement of the slide plate; the hinge plate realizes the hinge between the pusher plate and the slide plate, so that the pusher plate can rotate around the hinge point; the pusher plate is used to push the placement box at the bottom of the box body, and its top is higher than the bottom of the placement box to ensure that it can contact and push the placement box; the mounting plate fixes the needle and provides mounting support for the needle; the needle is used to insert the battery to complete the puncture detection; the second drive device provides power for the movement of the mounting plate, so that the needle moves closer to the opening or away from the opening. When the needle moves closer to the opening, it will gradually approach the placement box, and when the needle moves away from the opening, it will gradually detach from the placement box. Working principle: Batteries to be tested are placed into various placement boxes, with multiple placement boxes stacked inside the box. Initially, the pusher plate is located on one side of the pusher opening, and the placement box at the bottom of the box is in the test position. During testing, the second drive device drives the mounting plate to move towards the opening, causing the piercing needle to gradually approach the placement box and insert into the battery through the piercing hole, completing the test. After testing, the second drive device drives the mounting plate to move away from the opening, causing the piercing needle to be pulled out of the battery and gradually detach from the placement box. At the same time, the first drive device drives the slide plate to move back and forth along the slide groove, with the slide plate first moving towards the discharge port. The pusher plate moves in the direction of the material movement, causing it to push the placed box at the bottom of the box towards the outlet until the placed box is discharged from the outlet. Then, the slide plate resets towards the pusher outlet. At this time, the upper placed box inside the box falls to the bottom of the box under gravity. During the reset process, the pusher plate contacts the newly fallen placed box and rotates around the hinge point due to the obstruction of the placed box, causing its top height to drop below the bottom of the placed box. When the slide plate returns to its initial position, the pusher plate is no longer obstructed by the placed box and returns to its initial state, with its top height again above the bottom of the placed box, preparing for the next detection. In this invention, the detection device achieves automatic feeding and discharging during the detection process through the coordinated operation of its core components, completing the "old box discharge - new box replacement" cycle without manual intervention. The hinged design of the pusher plate allows it to automatically avoid collisions during reset without additional drive, preventing damage to the battery or box from hard collisions with new placed boxes, and seamlessly connecting the "push-avoid-reset" actions.

[0009] Preferably, the pusher plate has a right-angled triangular structure, and the right-angled end of the pusher plate is hinged to the hinge plate; the pusher plate includes a first right-angled side and a second right-angled side adjacent to the right-angled end, the top of the first right-angled side is higher than the bottom of the placement box, and the end of the second right-angled side away from the right-angled end abuts against the top of the slide plate.

[0010] In this technical solution, it should be noted that the right-angled triangular pusher plate has the right-angled end used to stably hinge with the hinge plate to ensure that the hinge point does not shift; the first right-angled side is used to contact and push the placement box, and its top is higher than the bottom of the placement box to ensure effective pushing; the second right-angled side is used to abut against the top of the slide plate to limit the rotation direction of the pusher plate and ensure that the pusher plate remains stable when pushing materials. Working principle: In the initial state, the second right-angled edge of the pusher plate abuts against the top of the slide plate, and the top of the first right-angled edge is higher than the bottom of the placement box. When the slide plate moves towards the discharge port, the second right-angled edge always remains abutting against the top of the slide plate, and the pusher plate cannot rotate around the hinge point. The first right-angled edge contacts the placement box at the bottom of the box and pushes the placement box towards the discharge port. After the placement box is discharged from the discharge port, the slide plate returns to its original position towards the pusher port. At this time, the upper placement box inside the box falls to the bottom of the box. The first right-angled edge of the pusher plate contacts the side of the new placement box and rotates around the hinge point towards the slide plate due to the obstruction of the placement box. The second right-angled edge gradually separates from the top of the slide plate, and the height of the top of the first right-angled edge gradually decreases to below the bottom of the placement box. When the slide plate returns to the initial position, the pusher plate rotates in the opposite direction around the hinge point to return to the initial state, and the height of the top of the first right-angled edge is again higher than the bottom of the placement box. This solution uses a right-angled triangle structure, where the second right-angled side abuts against the sliding plate to prevent the material from rotating during pushing and to automatically rotate during resetting due to the obstruction of the placement box. This eliminates the need for additional drive components to control the rotation of the pushing plate, simplifying the device structure, reducing costs, and ensuring smooth pushing and resetting actions. It also improves the efficiency of placing box replacement and avoids manual intervention.

[0011] Preferably, a first support is provided below the top plate; the second driving device includes a lead screw, which is rotatably connected to the first support; a limiting groove is provided through the top plate; a limiting block is provided at the bottom of the mounting plate; the limiting block is slidably embedded in the limiting groove; and the limiting block is threadedly connected to the lead screw; the first driving device includes a turntable, which is sleeved on the lead screw through a connecting member; an eccentric shaft is provided at one end of the turntable; a transmission rod is rotatably connected to the eccentric shaft; and the end of the transmission rod away from the eccentric shaft is hinged to the bottom of the slide plate; the connecting member is configured such that when the lead screw rotates and drives the mounting plate to move towards the opening, the turntable does not rotate; and when the lead screw rotates and drives the mounting plate to move away from the opening, the turntable rotates one revolution through the connecting member.

[0012] In this technical solution, it should be noted that the first support is used to support the lead screw to ensure the stable rotation of the lead screw. The lead screw is the core transmission component of the second driving device. While driving the moving plate to move, it drives the turntable to rotate through the connecting component. The limiting groove restricts the moving direction of the limiting block to ensure that the moving plate can only move in a straight line direction close to or away from the opening. The limiting block connects the moving plate and the lead screw, converting the rotational motion of the lead screw into the linear motion of the moving plate. The turntable drives the transmission rod to move through the eccentric shaft. The eccentric shaft converts the rotational motion of the turntable into the reciprocating swing of the transmission rod. The transmission rod connects the turntable and the sliding plate, converting the rotational motion of the turntable into the reciprocating linear motion of the sliding plate. The connecting component realizes the one-way transmission between the lead screw and the turntable, controlling the turntable to rotate only when the lead screw drives the moving plate away from the opening, and not to rotate when the lead screw drives the moving plate close to the opening. During detection, the motor drives the lead screw to rotate clockwise. Since the limiting block is threadedly connected to the lead screw and restricted by the limiting groove, the limiting block drives the moving plate to move in the direction close to the opening. At this time, due to the effect of the connecting component, the lead screw cannot drive the turntable to rotate, and the sliding plate and the pushing plate remain stationary, ensuring the stable position of the placement box during the puncture process. After detection, the motor drives the lead screw to rotate counterclockwise. The limiting block drives the moving plate to move in the direction away from the opening. At this time, the connecting component is in a combined state, and the lead screw drives the turntable to rotate synchronously with it for one week. When the turntable rotates, the eccentric shaft makes a circular motion around the center of the turntable, pulling the sliding plate to move along the chute first in the direction close to the discharge port, and then resetting in the direction close to the pushing port, completing a reciprocating movement, and further driving the pushing plate to complete the discharge of the placement box after detection and the positioning of the new placement box. In this solution, the lead screw is supported by the first support to prevent the shaking of the lead screw from affecting the moving accuracy of the moving plate and ensuring the accurate alignment of the puncture needle and the puncture port. Through the cooperation of the lead screw, the limiting groove and the limiting block, the accurate linear movement of the moving plate is realized, improving the puncture accuracy. Through the cooperation of the turntable, the eccentric shaft and the transmission rod, the rotation of the lead screw is converted into the reciprocating movement of the sliding plate, and no additional driving device is required to realize the linkage between the movement of the puncture needle and the movement of the sliding plate. By controlling the rotation timing of the turntable through the connecting component, it is ensured that the pushing plate does not move during detection and automatic material replacement after detection, avoiding action interference and improving the operation coordination and automation degree of the device.

[0013] Preferably, the connecting component is a one-way bearing, and the turntable is sleeved on the lead screw through the one-way bearing.

[0014] In this technical solution, it should be noted that the one-way bearing, as a connecting component, contains an inner ring, an outer ring, rolling elements (usually rollers or balls), and a cage. The inner ring is used to fix the connection with the lead screw, and the outer ring is used to fix the connection with the turntable. It can only transmit power in a specific direction (the direction in which the lead screw drives the mounting plate away from the opening), causing the turntable to rotate with the lead screw. In the opposite direction (the direction in which the lead screw drives the mounting plate closer to the opening), it cannot transmit power, and the turntable remains stationary. When the lead screw rotates clockwise, the inner ring of the one-way bearing rotates clockwise with the lead screw. At this time, the rolling elements are in the "slippage area" between the inner and outer rings under the action of the cage. The inner ring cannot drive the outer ring to rotate, and the outer ring and the turntable fixed to it remain stationary. The slide plate and pusher plate also remain stationary, ensuring the stability of the placement box during puncture. When the lead screw rotates counterclockwise, the inner ring of the one-way bearing rotates counterclockwise with the lead screw. The rolling elements are squeezed into the "locking area" between the inner and outer rings under the action of friction. The inner ring drives the outer ring to rotate counterclockwise synchronously through the rolling elements. The outer ring drives the turntable to rotate one revolution together with the lead screw. In this scheme, the one-way bearing realizes the unidirectional transmission between the lead screw and the turntable, so that the rotation of the lead screw can be converted into the reciprocating movement of the slide plate when the puncture needle is reset, realizing the continuity of material discharge and feeding, and avoiding motion interference with the puncture experiment.

[0015] Preferably, the side wall of the slide is provided with a slot, the slot is provided along the length of the slide, and the slide plate is provided with a block, the block being slidably embedded in the slot.

[0016] In this technical solution, it should be noted that the slot restricts the movement direction of the card block to prevent the slide from deviating or detaching from the slide along a direction perpendicular to the length of the slide (such as the up and down direction or the left and right directions); the card block cooperates with the slot to enhance the connection stability between the slide and the slide, ensuring that the slide can only slide smoothly along the length of the slide.

[0017] Preferably, the mounting plate has a stabilizing post at the end facing the opening, and the length of the stabilizing post is greater than the length of the needle; the stabilizing post includes a fixed post and a telescopic post, the fixed post is fixed on the mounting plate, the telescopic post has a cavity inside, one end of the fixed post is slidably inserted into the cavity of the telescopic post, and the telescopic post is provided with a spring, the end of the spring away from the telescopic post is connected to the mounting plate.

[0018] In this technical solution, it should be noted that the stabilizing column contacts the placement box first as the needle approaches it, pre-fixing the placement box to prevent it from shifting during puncture; the fixing column connects the mounting plate to the subsequent piston plate, driving the piston plate to move within the cavity; the telescopic column slides with the fixing column to achieve the extension and retraction of the stabilizing column's length; the cavity provides movement space for the piston plate and also stores air; the spring stores elastic potential energy when the stabilizing column is compressed and releases the potential energy when the stabilizing column resets, causing the telescopic column to return to its initial length. Working Principle: As the mounting plate moves closer to the opening, the end of the stabilizing post, being longer than the needle, contacts the side of the placement box before the needle. As the mounting plate continues to move closer, the placement box generates resistance against the telescopic post, causing it to slide relative to the fixed post towards the mounting plate. The cavity volume gradually decreases, and the spring on the telescopic post is compressed, storing elastic potential energy. After the puncture test, the mounting plate moves away from the opening. The resistance of the placement box to the telescopic post disappears, the spring releases its elastic potential energy, and the telescopic post slides relative to the fixed post away from the opening. The cavity volume gradually increases, and the stabilizing post returns to its initial length, preparing for the next pre-fixation. In this design, the stabilizing post pre-fixes the placement box before puncture, preventing the box from shifting due to force when the needle is inserted, thus improving detection accuracy. The fixed post, telescopic post, and spring work together to achieve elastic extension and contraction of the stabilizing post, preventing rigid contact between the stabilizing post and the placement box from causing deformation or battery damage, thus protecting the device and the battery under test.

[0019] Preferably, one end of the fixed column is provided with a piston plate, which is slidably embedded in the cavity, and the side wall of the telescopic column is provided with a nozzle that communicates with the cavity, with the air outlet of the nozzle facing the needle.

[0020] In this technical solution, it should be noted that when the mounting plate moves towards the opening and the stabilizing column is compressed, the fixed column drives the piston plate to slide towards the mounting plate within the cavity of the telescopic column. The air in the cavity is compressed by the piston plate, and the pressure gradually increases. When the air pressure reaches a certain value, high-pressure air is ejected through the nozzle on the side wall of the telescopic column. The ejected airflow directly blows onto the surface of the piercing needle, removing battery debris, electrolyte, and other impurities remaining on the needle due to puncture. After the test is completed, the mounting plate moves away from the opening, the spring drives the telescopic column to reset, and the piston plate moves away from the opening along with the fixed column. The cavity volume increases, and outside air enters the cavity through the nozzle to replenish the air for the next compression. In this solution, the high-pressure gas generated by the piston plate during the compression of the stabilizing column cleans the piercing needle, eliminating the need for an additional air pump or cleaning device, simplifying the device structure and reducing equipment costs. At the same time, it promptly removes impurities from the surface of the piercing needle, preventing impurities from affecting the depth and accuracy of the next puncture, ensuring the sharpness of the piercing needle, and reducing the frequency of piercing needle maintenance and replacement costs.

[0021] Preferably, there are two stabilizing columns, which are symmetrically arranged on both sides of the needle.

[0022] In this technical solution, it should be noted that, compared with a single stabilizing column, the symmetrically arranged stabilizing columns on both sides make the placement box more evenly stressed and more firmly fixed, effectively preventing the placement box from shifting or tilting to one side, and further improving the accuracy of the needle puncture position; at the same time, it prevents the placement box from deforming or damaging the internal battery due to excessive force on one side, protecting the battery to be tested and the placement box, and improving the detection stability and safety of the device.

[0023] Preferably, the end of the box body away from the mounting plate is provided with a reinforcing rib, one end of which is connected to the box body and the other end is connected to the top plate.

[0024] In this technical solution, it should be noted that the reinforcing rib connects the end of the box away from the mounting plate to the top plate, forming a triangular support structure. This enhances the connection strength between the box and the top plate, preventing the box from tilting or deforming away from the mounting plate due to its own weight or the pressure of multiple boxes. At the same time, it disperses the pressure of the box on the top plate, preventing the top plate from being damaged due to excessive local stress.

[0025] A testing method for lithium batteries, comprising:

[0026] Step S1: Place the batteries to be tested into each placement box individually, and then stack the multi-layer placement boxes vertically inside the box body; at this time, the pusher plate is initially located on one side of the pusher port at the bottom of the box body, and the placement box at the bottom of the box body is exactly in the testing position;

[0027] Step S2: Start the second drive device. The second drive device drives the mounting plate to move towards the opening of the box. The mounting plate drives the piercing needle to move synchronously. The piercing needle gradually approaches the test box at the bottom of the box and finally inserts into the battery in the box through the piercing hole on the side wall of the test box to complete the lithium battery piercing test operation.

[0028] Step S3: After the puncture test is completed, the second drive device runs in reverse, driving the mounting plate to move away from the opening of the box; the mounting plate simultaneously drives the needle to be pulled out of the battery, and the needle gradually separates from the placement box and the box body, returning to the initial position, making room for subsequent replacement of the placement box;

[0029] As the needle resets, the first drive unit starts, driving the slide plate to move along the groove on the top plate towards the discharge port of the box; the pusher plate at the top of the slide plate moves synchronously with the slide plate, and the pusher plate contacts the placement box detected at the bottom of the box and pushes it towards the discharge port until the placement box is completely discharged from the discharge port.

[0030] After the placement box is discharged, the first drive device drives the slide plate to initially reset towards the direction of the box body push port; at this time, the placement boxes that were originally superimposed on the top inside the box body fall vertically under the action of gravity and finally fall to the bottom of the box body, filling the empty space after the original test placement box is discharged, forming a new test placement box.

[0031] As the slide continues to reset towards the push port, the push plate contacts the side of the newly dropped test box at the bottom of the box body; under the blocking force of the test box, the push plate rotates around the hinge point with the hinge plate, and the top height of the push plate gradually decreases to below the bottom of the new test box to avoid collision or jamming between the push plate and the new test box.

[0032] When the slide plate returns to its initial position, the pusher plate is no longer obstructed by the newly placed box; under the action of its own structure and gravity, the pusher plate rotates in the opposite direction around the hinge point, returning to its initial state, and its top height is once again higher than the bottom of the newly placed box at the bottom of the box body; at this time, the entire device is reset and awaits the next puncture detection cycle.

[0033] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0034] 1. In this invention, the detection device achieves automatic feeding and discharging during the detection process through the coordinated operation of its core components, completing the cycle of "old box discharge - new box replacement" without manual intervention. The hinged design of the pusher plate allows for automatic avoidance during reset without additional drive, preventing hard collisions with newly placed boxes that could damage the battery or box body, and seamlessly connecting the "push-avoidance-reset" actions.

[0035] 2. In this invention, the lead screw is supported by a first support to prevent the lead screw from shaking and affecting the movement accuracy of the mounting plate, ensuring precise alignment between the needle and the puncture site; the lead screw, limit groove, and limit block work together to achieve precise linear movement of the mounting plate, improving puncture accuracy; the turntable, eccentric shaft, and transmission rod work together to convert the rotation of the lead screw into the reciprocating movement of the slide plate, eliminating the need for an additional drive device and achieving linkage between the movement of the needle and the movement of the slide plate; the timing of the turntable rotation is controlled by a connecting piece to ensure that the push plate does not move during detection and automatically changes material after detection, avoiding interference and improving the coordination and automation of the device operation.

[0036] 3. In this invention, the high-pressure gas generated by the piston plate during the compression of the stabilizing column is used to clean the puncture needle, eliminating the need for an additional air pump or cleaning device, thus simplifying the device structure and reducing equipment costs. At the same time, it promptly removes impurities from the surface of the puncture needle, preventing impurities from affecting the depth and accuracy of the next puncture, ensuring the sharpness of the puncture needle, and reducing the maintenance frequency and replacement cost of the puncture needle. 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 for Figure 1 A schematic diagram of the three-dimensional structure after the top plate has been cut;

[0040] Figure 3 for Figure 2 A three-dimensional structural diagram of the central top slab;

[0041] Figure 4 for Figure 2 A three-dimensional structural diagram of the structure without a top plate;

[0042] Figure 5 This is a three-dimensional structural diagram of the placement box and pusher plate in the initial state of the present invention;

[0043] Figure 6 for Figure 5 A rear-view three-dimensional structural diagram;

[0044] Figure 7 This is a three-dimensional structural diagram of the pusher plate and the placement box when the pusher plate of the present invention is reset;

[0045] Figure 8 This is a three-dimensional structural diagram of the mounting plate of the present invention;

[0046] Figure 9 This is a cross-sectional three-dimensional structural schematic diagram of the stabilizing column of the present invention;

[0047] Figure 10 This is a front view structural diagram of the box body of the present invention;

[0048] Wherein: 100-Top plate, 101-Slide groove, 102-Limiting groove, 103-Card slot, 200-Box body, 201-Opening, 202-Pushing port, 203-Reinforcing rib, 204-Discharge port, 300-Placement box, 301-Piercing port, 302-Battery, 400-Mounting plate, 401-Piercing needle, 402-Limiting block, 403-Stabilizing column, 4031-Fixing column, 4032-Telescopic Column, 4033-Cavity, 4034-Spring, 4035-Piston Plate, 4036-Nozzle, 500-First Support, 501-Lead Screw, 502-Motor, 503-Turntable, 5031-Eccentric Shaft, 504-One-Way Bearing, 505-Transmission Rod, 600-Push Plate, 601-Slide Plate, 602-Clamping Block, 603-Hinge Plate, 604-Second Right Angle Side, 605-First Right Angle Side. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0052] 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.

[0053] 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.

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0055] Example 1

[0056] like Figures 1-10As shown in the figure, an embodiment of the present invention discloses a detection device for lithium battery 302, including a top plate 100, a box body 200 on the top plate 100, and a plurality of placement boxes 300 stacked from top to bottom inside the box body 200. Each placement box 300 contains a battery 302, and a puncture port 301 is provided through one side of the placement box 300. A push port 202 and a discharge port 204 are respectively provided through the two ends of the bottom length direction of the box body 200. The height of the discharge port 204 is approximately the same as the height of the placement box 300. An opening 201 is provided through one end of the box body 200 in the width direction. A sliding groove 101 is provided through the top plate 100, and the sliding groove 101 is located below the box body 200. The slide 101 is arranged along the length of the top plate 100. A slide plate 601 is slidably embedded in the slide 101. The slide plate 601 is driven by a first driving device to reciprocate along the length of the slide 101. A hinge plate 603 is provided on the top of the slide plate 601. A pusher plate 600 is hinged on the hinge plate 603. The top of the pusher plate 600 is higher than the bottom of the placement box 300, and one end of the pusher plate 600 abuts against the top of the slide plate 601. The top plate 100 is also provided with a mounting plate 400. A needle 401 opposite to the puncture opening 301 is provided on the mounting plate 400. The mounting plate 400 is driven by a second driving device to move in a direction close to or away from the opening 201.It should be noted that the top plate 100 provides basic support for the entire device, bearing all components such as the box body 200, slide plate 601, and mounting plate 400; the box body 200 is the carrier for the placement box 300, limiting the multiple overlapping placement boxes 300 to prevent them from shifting; the placement box 300 is used to individually hold the battery 302 to be tested, achieving independent positioning of the battery 302 and avoiding mutual interference between batteries 302; the puncture port 301 provides a puncture point for the puncture needle 401. The piercing channel ensures that the piercing needle 401 can be accurately aligned with the battery 302; the push port 202 is the entrance for the pusher plate 600 to extend into the box body 200 to push the placement box 300; the discharge port 204 is the discharge channel for the placement box 300 after testing, and its height is equivalent to that of the placement box 300 to ensure smooth discharge; the opening 201 provides space for the mounting plate 400 to move the piercing needle 401 close to the placement box 300, avoiding obstruction by the box body 200; the slide groove 101 restricts the sliding of the slide plate 601. The direction ensures that the slide plate 601 moves stably along the length of the top plate 100; the slide plate 601 is the mounting carrier of the pusher plate 600, and drives the pusher plate 600 to move by sliding; the first drive device provides power for the reciprocating movement of the slide plate 601; the hinge plate 603 realizes the hinge between the pusher plate 600 and the slide plate 601, so that the pusher plate 600 can rotate around the hinge point; the pusher plate 600 is used to push the placement box 300 at the bottom of the box body 200, and its top is higher than the bottom of the placement box 300. The device can contact and push the placement box 300; the mounting plate 400 fixes the needle 401 and provides mounting support for the needle 401; the needle 401 is used to insert the battery 302 to complete the puncture detection; the second driving device provides power for the movement of the mounting plate 400, so that the needle 401 moves closer to the opening 201 or away from the opening 201. When the needle 401 moves closer to the opening 201, it will gradually approach the placement box 300; when the needle 401 moves away from the opening 201, it will gradually detach from the placement box 300.Working principle: The batteries 302 to be tested are placed into the respective placement boxes 300, and the multiple placement boxes 300 are stacked inside the box body 200. Initially, the pusher plate 600 is located on one side of the push port 202, and the placement box 300 at the bottom of the box body 200 is in the position to be tested. During testing, the second driving device drives the mounting plate 400 to move towards the opening 201, causing the piercing needle 401 to gradually approach the placement box 300 and insert into the battery 302 through the piercing port 301 to complete the test. After testing, the second driving device drives the mounting plate 400 to move away from the opening 201, causing the piercing needle 401 to be pulled out of the battery 302 and gradually detach from the placement box 300. At the same time, the first driving device drives the sliding plate 601 to move back and forth along the slide groove 101. The sliding plate 601 first moves towards the opening 201. The movement of the discharge port 204 causes the pusher plate 600 to push the placement box 300, which has been detected at the bottom of the box body 200, towards the discharge port 204 until the placement box 300 is discharged from the discharge port 204. Then, the slide plate 601 returns to its original position near the pusher port 202. At this time, the upper placement box 300 inside the box body 200 falls to the bottom of the box body 200 under gravity. During the resetting process, the pusher plate 600 contacts the newly fallen placement box 300 and is blocked by the placement box 300, rotating around the hinge point, causing its top height to drop below the bottom of the placement box 300. When the slide plate 601 returns to its initial position, the pusher plate 600 is no longer blocked by the placement box 300 and returns to its initial state, with its top height again higher than the bottom of the placement box 300, preparing for the next detection. In this invention, the detection device achieves automatic feeding and discharging during the detection process through the coordinated operation of its core components, completing the cycle of "old box discharge - new box replacement" without manual intervention. The hinged design of the pusher plate 600 enables it to automatically avoid collisions during reset without additional drive, preventing damage to the battery 302 or the box 200 from hard collisions with the newly placed box 300, and also allows for seamless connection of the "push-avoid-reset" action.

[0057] like Figures 5-7As shown, in this embodiment, the pusher plate 600 has a right-angled triangular structure, and the right-angled end of the pusher plate 600 is hinged to the hinge plate 603. The pusher plate 600 includes a first right-angled side 605 and a second right-angled side 604 adjacent to the right-angled end. The top of the first right-angled side 605 is higher than the bottom of the placement box 300, and the end of the second right-angled side 604 away from the right-angled end abuts against the top of the slide plate 601. It should be noted that the right-angled triangular structure of the pusher plate 600 is used for stable hinge with the hinge plate 603 to ensure that the hinge point does not shift; the first right-angled side 605 is used to contact and push the placement box 300, and its top is higher than the bottom of the placement box 300 to ensure effective pushing; the second right-angled side 604 is used to abut against the top of the slide plate 601 to limit the rotation direction of the pusher plate 600 and ensure that the pusher plate 600 remains stable during pushing. Working principle: In the initial state, the second right-angled side 604 of the pusher plate 600 abuts against the top of the slide plate 601, and the top of the first right-angled side 605 is higher than the bottom of the placement box 300. When the slide plate 601 moves towards the discharge port 204, the second right-angled side 604 always remains in contact with the top of the slide plate 601, and the pusher plate 600 cannot rotate around the hinge point. The first right-angled side 605 contacts the placement box 300 at the bottom of the box body 200 and pushes the placement box 300 towards the discharge port 204. After the placement box 300 is discharged from the discharge port 204, the slide plate 601 moves towards the pusher port 202. Upon resetting, the upper placement box 300 inside the box body 200 falls to the bottom of the box body 200. The first right-angled side 605 of the pusher plate 600 contacts the side of the new placement box 300 and rotates around the hinge point towards the slide plate 601 due to the obstruction of the placement box 300. The second right-angled side 604 gradually separates from the top of the slide plate 601, and the top height of the first right-angled side 605 gradually decreases until it is lower than the bottom of the placement box 300. When the slide plate 601 returns to the initial position, the pusher plate 600 rotates in the opposite direction around the hinge point to return to the initial state, and the top height of the first right-angled side 605 is again higher than the bottom of the placement box 300. This solution uses a right-angled triangle structure, utilizing the contact between the second right-angled side 604 and the slide plate 601 to achieve non-rotation during pushing and automatic rotation during resetting due to the obstruction of the placement box 300. No additional drive components are needed to control the rotation of the pusher plate 600, simplifying the device structure, reducing costs, and ensuring smooth pushing and resetting actions, improving the efficiency of placing box 300 replacement, and avoiding manual intervention.

[0058] like Figure 3As shown, in this embodiment, a slot 103 is provided on the side wall of the slide groove 101. The slot 103 is arranged along the length direction of the slide groove 101. A locking block 602 is provided on the slide plate 601, and the locking block 602 is slidably embedded in the slot 103. It should be noted that the slot 103 restricts the movement direction of the locking block 602, preventing the slide plate 601 from shifting or disengaging from the slide groove 101 in a direction perpendicular to the length of the slide groove 101 (such as the up-down direction or the left-right direction). The locking block 602 cooperates with the slot 103 to enhance the connection stability between the slide plate 601 and the slide groove 101, ensuring that the slide plate 601 can only slide smoothly along the length direction of the slide groove 101.

[0059] like Figure 4 As shown, in this embodiment, a reinforcing rib 203 is provided at the end of the box body 200 away from the mounting plate 400. One end of the reinforcing rib 203 is connected to the box body 200, and the other end is connected to the top plate 100. It should be noted that the reinforcing rib 203 connects the end of the box body 200 away from the mounting plate 400 to the top plate 100, forming a triangular support structure. This enhances the connection strength between the box body 200 and the top plate 100, preventing the box body 200 from tilting or deforming away from the mounting plate 400 due to its own weight or the pressure of multiple boxes 300 placed on it. At the same time, it disperses the pressure of the box body 200 on the top plate 100, preventing the top plate 100 from being damaged due to excessive local stress.

[0060] Example 2

[0061] like Figures 2-4As shown, this embodiment is largely the same as the above embodiment, except that a first support 500 is provided below the top plate 100; the second driving device includes a lead screw 501, which is rotatably connected to the first support 500; a limiting groove 102 is provided through the top plate 100; a limiting block 402 is provided at the bottom of the mounting plate 400; the limiting block 402 is slidably embedded in the limiting groove 102; and the limiting block 402 is threadedly connected to the lead screw 501; the first driving device includes a turntable 503, which is sleeved on the top plate 100 via a connecting member. On the lead screw 501, one end of the turntable 503 is provided with an eccentric shaft 5031, and a transmission rod 505 is rotatably connected to the eccentric shaft 5031. The end of the transmission rod 505 away from the eccentric shaft 5031 is hinged to the bottom of the slide plate 601. The connecting member is configured such that when the lead screw 501 rotates and drives the mounting plate 400 to move towards the opening 201, the turntable 503 does not rotate through the connecting member. When the lead screw 501 rotates and drives the mounting plate 400 to move away from the opening 201, the turntable 503 rotates one revolution through the connecting member. It should be noted that the first support 500 is used to support the lead screw 501, ensuring its stable rotation; the lead screw 501 is the core transmission component of the second drive device, driving the mounting plate 400 to move while simultaneously driving the turntable 503 to rotate via the connecting parts; the limiting groove 102 restricts the movement direction of the limiting block 402, ensuring that the mounting plate 400 can only move in a straight line direction close to or away from the opening 201; the limiting block 402 connects the mounting plate 400 and the lead screw 501, converting the rotational motion of the lead screw 501 into the linear motion of the mounting plate 400; The turntable 503 drives the transmission rod 505 to move via the eccentric shaft 5031; the eccentric shaft 5031 converts the rotational motion of the turntable 503 into the reciprocating oscillation of the transmission rod 505; the transmission rod 505 connects the turntable 503 and the slide plate 601, converting the rotational motion of the turntable 503 into the reciprocating linear motion of the slide plate 601; the connecting piece realizes the unidirectional transmission between the lead screw 501 and the turntable 503, controlling the turntable 503 to rotate only when the lead screw 501 drives the mounting plate 400 away from the opening 201, and not to rotate when the lead screw 501 drives the mounting plate 400 closer to the opening 201.During testing, motor 502 drives lead screw 501 to rotate clockwise. Because limit block 402 is threadedly connected to lead screw 501 and restricted by limit groove 102, limit block 402 moves mounting plate 400 towards opening 201. At this time, due to the connecting parts, lead screw 501 cannot drive turntable 503 to rotate, and slide plate 601 and pusher plate 600 remain stationary, ensuring the stability of placement box 300 during piercing. After testing, motor 502 drives lead screw 501 to rotate counterclockwise, and limit block 402 moves mounting plate 400 towards opening 201. 00 moves away from the opening 201. At this time, the connecting parts are in the engaged state. The lead screw 501 drives the turntable 503 to rotate synchronously for one revolution. When the turntable 503 rotates, the eccentric shaft 5031 makes a circular motion around the center of the turntable 503. Through the transmission rod 505, the slide plate 601 is pulled along the slide groove 101 to move towards the discharge port 204 and then reset towards the push port 202, completing one reciprocating movement. This drives the push plate 600 to complete the discharge of the detection and placement box 300 and the positioning of the new placement box 300. In this design, the first support 500 supports the lead screw 501, preventing the lead screw 501 from shaking and affecting the movement accuracy of the mounting plate 400, thus ensuring precise alignment between the needle 401 and the puncture port 301. The lead screw 501, the limiting groove 102, and the limiting block 402 work together to achieve precise linear movement of the mounting plate 400, improving puncture accuracy. The turntable 503, the eccentric shaft 5031, and the transmission rod 505 work together to convert the rotation of the lead screw 501 into the reciprocating movement of the sliding plate 601, eliminating the need for an additional drive device and achieving linkage between the movement of the needle 401 and the sliding plate 601. The timing of the turntable 503's rotation is controlled by a connecting component, ensuring that the pusher plate 600 does not move during testing and automatically changes material after testing, avoiding interference and improving the coordination and automation of the device operation.

[0062] like Figure 2As shown, in this embodiment, the connecting member is a one-way bearing 504, and the turntable 503 is sleeved on the lead screw 501 through the one-way bearing 504. It should be noted that the one-way bearing 504, as a connecting member, includes an inner ring, an outer ring, rolling elements (usually rollers or balls), and a cage. The inner ring is used for fixed connection with the lead screw 501, and the outer ring is used for fixed connection with the turntable 503. It can only transmit power in a specific direction (the direction in which the lead screw 501 drives the mounting plate 400 away from the opening 201), causing the turntable 503 to rotate with the lead screw 501. In the opposite direction (the direction in which the lead screw 501 drives the mounting plate 400 closer to the opening 201), it cannot transmit power, and the turntable 503 remains stationary. When the lead screw 501 rotates clockwise, the inner ring of the one-way bearing 504 rotates clockwise with the lead screw 501. At this time, the rolling elements are in the "slippage area" between the inner and outer rings under the action of the cage. The inner ring cannot drive the outer ring to rotate, and the outer ring and the turntable 503 fixed to it remain stationary. The slide plate 601 and the pusher plate 600 also remain stationary, ensuring the stability of the placement box 300 during puncture. When the lead screw 501 rotates counterclockwise, the inner ring of the one-way bearing 504 rotates counterclockwise with the lead screw 501. Under the action of friction, the rolling elements are squeezed into the "locking area" between the inner and outer rings. The inner ring drives the outer ring to rotate counterclockwise synchronously through the rolling elements. The outer ring drives the turntable 503 to rotate one revolution together with the lead screw 501. In this scheme, the one-way bearing 504 realizes the one-way transmission between the lead screw 501 and the turntable 503, so that the rotation of the lead screw 501 can be converted into the reciprocating movement of the slide plate 601 when the needle 401 is reset, realizing the continuity of material discharge and feeding, and avoiding motion interference with the puncture experiment.

[0063] Example 3

[0064] like Figures 7-8As shown, this embodiment is largely the same as the above embodiment, except that the mounting plate 400 has a stabilizing post 403 at one end facing the opening 201, and the length of the stabilizing post 403 is greater than the length of the needle 401; the stabilizing post 403 includes a fixing post 4031 and a telescopic post 4032, the fixing post 4031 is fixed on the mounting plate 400, the telescopic post 4032 has a cavity 4033 inside, one end of the fixing post 4031 is slidably inserted into the cavity 4033 of the telescopic post 4032, and the telescopic post 4032 is provided with a spring 4034, the end of the spring 4034 away from the telescopic post 4032 is connected to the mounting plate 400. It should be noted that the stabilizing post 403 contacts the placement box 300 first as the needle 401 approaches it, pre-fixing the placement box 300 to prevent it from shifting during puncture; the fixing post 4031 connects the mounting plate 400 to the subsequent piston plate 4035, driving the piston plate 4035 to move within the cavity 4033; the telescopic post 4032 slides with the fixing post 4031 to achieve the extension and retraction of the stabilizing post 403; the cavity 4033 provides space for the piston plate 4035 to move and also stores air; the spring 4034 stores elastic potential energy when the stabilizing post 403 is compressed and releases the potential energy when the stabilizing post 403 is reset, driving the telescopic post 4032 to return to its initial length. Working principle: When the mounting plate 400 moves towards the opening 201, since the length of the stabilizing post 403 is greater than the length of the needle 401, the end of the stabilizing post 403 contacts the side of the placement box 300 before the needle 401. As the mounting plate 400 continues to move towards the opening 201, the placement box 300 generates reverse resistance on the telescopic post 4032, causing the telescopic post 4032 to slide relative to the fixed post 4031 towards the mounting plate 400. The volume of the cavity 4033 gradually decreases, and the spring 4034 on the telescopic post 4032 is compressed and stores elastic potential energy. After the puncture detection is completed, the mounting plate 400 moves away from the opening 201. The resistance of the placement box 300 on the telescopic post 4032 disappears, the spring 4034 releases its elastic potential energy, and pushes the telescopic post 4032 relative to the fixed post 4031 away from the opening 201. The volume of the cavity 4033 gradually increases, and the stabilizing post 403 returns to its initial length, preparing for the next pre-fixation. In this solution, the placement box 300 is pre-fixed by the stabilizing column 403 before puncture to prevent the placement box 300 from shifting due to force when the needle 401 is inserted, thereby improving the detection accuracy. The stabilizing column 4031, the telescopic column 4032 and the spring 4034 work together to achieve the elastic extension and contraction of the stabilizing column 403, thereby preventing the stabilizing column 403 from rigidly contacting the placement box 300, which could cause deformation of the placement box 300 or damage to the battery 302, thus protecting the device and the battery 302 to be tested.

[0065] like Figure 8As shown, in this embodiment, one end of the fixed column 4031 is provided with a piston plate 4035, which is slidably embedded in the cavity 4033. The side wall of the telescopic column 4032 is provided with a nozzle 4036 that communicates with the cavity 4033, and the air outlet of the nozzle 4036 faces the needle 401. It should be noted that when the mounting plate 400 moves towards the opening 201 and the stabilizing column 403 is compressed, the fixed column 4031 drives the piston plate 4035 to slide towards the mounting plate 400 within the cavity 4033 of the telescopic column 4032. The air in the cavity 4033 is compressed by the piston plate 4035, and the pressure gradually increases. When the air pressure reaches a certain value, the high-pressure air is ejected through the nozzle 4036 on the side wall of the telescopic column 4032. The ejected airflow blows directly onto the surface of the piercing needle 401, removing impurities such as battery debris and electrolyte remaining on the piercing needle 401 due to puncture. After the test is completed, the mounting plate 400 moves away from the opening 201, the spring 4034 drives the telescopic column 4032 to reset, and the piston plate 4035 moves away from the opening 201 along with the fixed column 4031. The volume of the cavity 4033 increases, and outside air enters the cavity 4033 through the nozzle 4036 to replenish the air for the next compression. In this solution, the high-pressure gas generated by the piston plate 4035 during the compression of the stabilizing column 403 is used to clean the puncture needle 401, eliminating the need for an additional air pump or cleaning device, thus simplifying the device structure and reducing equipment costs. At the same time, it promptly removes impurities from the surface of the puncture needle 401, preventing impurities from affecting the depth and accuracy of the next puncture, ensuring the sharpness of the puncture needle 401, and reducing the maintenance frequency and replacement cost of the puncture needle 401.

[0066] like Figure 8 As shown, in this embodiment, there are two stabilizing posts 403, which are symmetrically arranged on both sides of the puncture needle 401. It should be noted that, compared to a single stabilizing post 403, the symmetrical arrangement of stabilizing posts 403 on both sides makes the placement box 300 more evenly stressed and more firmly fixed, effectively preventing unilateral shift or tilting of the placement box 300, further improving the accuracy of the puncture position of the puncture needle 401; at the same time, it prevents the placement box 300 from deforming due to excessive force on one side or damaging the internal battery 302, protecting the battery 302 to be tested and the placement box 300, and improving the detection stability and safety of the device.

[0067] Example 4

[0068] This embodiment proposes a detection method for lithium battery 302, including:

[0069] Step S1: Place the battery 302 to be tested into each placement box 300 independently, and then stack the multi-layer placement boxes 300 vertically inside the box body 200; at this time, the pusher plate 600 is initially located on one side of the push port 202 at the bottom of the box body 200, and the placement box 300 at the bottom of the box body 200 is exactly in the testing position.

[0070] Step S2: Start the second drive device. The second drive device drives the mounting plate 400 to move towards the opening 201 of the box 200. The mounting plate 400 drives the piercing needle 401 to move simultaneously. The piercing needle 401 gradually approaches the test placement box 300 at the bottom of the box 200 and finally inserts into the battery 302 inside the box 200 through the piercing hole 301 on the side wall of the placement box 300, thus completing the lithium battery 302 piercing test operation.

[0071] Step S3: After the puncture test is completed, the second drive device runs in reverse, driving the mounting plate 400 to move away from the opening 201 of the box 200; the mounting plate 400 simultaneously drives the needle 401 to be pulled out of the battery 302, and the needle 401 gradually separates from the placement box 300 and the box 200, returning to the initial position, making room for the subsequent replacement of the placement box 300.

[0072] As the needle 401 resets, the first drive device is activated, driving the slide plate 601 to move along the slide groove 101 on the top plate 100 toward the discharge port 204 of the box body 200; the pusher plate 600 on the top of the slide plate 601 moves synchronously with the slide plate 601, and the pusher plate 600 contacts the placement box 300 after detection at the bottom of the box body 200 and pushes it toward the discharge port 204 until the placement box 300 is completely discharged from the discharge port 204;

[0073] After the placement box 300 is discharged, the first driving device drives the slide plate 601 to initially reset towards the direction of the push port 202 of the box body 200; at this time, the placement box 300 that was originally superimposed on the top inside the box body 200 falls vertically under the action of gravity and finally lands at the bottom of the box body 200, filling the empty space after the original detection placement box 300 is discharged, forming a new placement box 300 to be tested.

[0074] As the slide plate 601 continues to reset towards the push port 202, the push plate 600 contacts the side of the newly dropped test placement box 300 at the bottom of the box body 200; under the blocking force of the placement box 300, the push plate 600 rotates around the hinge point with the hinge plate 603, and the top height of the push plate 600 gradually decreases to below the bottom of the new placement box 300 to avoid collision or jamming between the push plate 600 and the new placement box 300.

[0075] When the slide plate 601 returns to its initial position, the pusher plate 600 is no longer blocked by the new placement box 300; the pusher plate 600 rotates in the opposite direction around the hinge point under the action of its own structure and gravity, and returns to its initial state, and its top height is once again higher than the bottom of the new placement box 300 at the bottom of the box body 200; at this time, the entire device is reset and waiting for the next puncture detection cycle.

[0076] The working principle of this invention is as follows:

[0077] Before testing, the batteries 302 to be tested are placed individually into their respective placement boxes 300. Then, the multi-layered placement boxes 300 are stacked vertically inside the box body 200. At this point, the pusher plate 600 is initially located on one side of the push opening 202 at the bottom of the box body 200. The second right-angled side 604 of the pusher plate 600 abuts against the top of the slide plate 601, and the top of the first right-angled side 605 is higher than the bottom of the bottom placement box 300 of the box body 200. The bottommost placement box 300 of the box body 200 is precisely at the testing position. When testing starts, the motor 502 drives the lead screw 501 in the second drive device to rotate clockwise. The limit block 402 drives the mounting plate 400 to move towards the opening 201 of the box body 200. The stabilizing column 403 contacts both sides of the placement box 300 before the piercing needle 401. As the mounting plate 400 continues to move, the placement box... The placement box 300 generates resistance to the telescopic column 4032 of the stabilizing column 403. The telescopic column 4032 slides relative to the fixed column 4031, and the internal spring 4034 is compressed. At the same time, the piston plate 4035 at one end of the fixed column 4031 slides in the cavity 4033 of the telescopic column 4032 to compress air. The high-pressure air is sprayed out through the side wall of the telescopic column 4032 toward the nozzle 4036 of the needle 401 to remove impurities from the surface of the needle 401. Then the needle 401 is inserted into the battery 302 through the puncture port 301 of the placement box 300 to complete the detection. During this process, the turntable 503 on the lead screw 501 is sleeved by the one-way bearing 504. When the inner ring of the one-way bearing 504 rotates clockwise, the rolling element is in the slip area. The outer ring and the turntable 503 remain stationary. The slide plate 601 and the pusher plate 600 are also stationary, ensuring the stability of the placement box 300.

[0078] After the test is completed, the motor 502 drives the lead screw 501 to rotate counterclockwise, the limit block 402 drives the mounting plate 400 to move away from the opening 201, the needle 401 is pulled out from the battery 302, the inner ring of the one-way bearing 504 rotates counterclockwise and the rolling element enters the locking area, the inner ring drives the outer ring and the turntable 503 to rotate synchronously for one revolution, the eccentric shaft 5031 on the turntable 503 pulls the slide plate 601 along the slide groove 101 to move closer to the discharge port 204 through the transmission rod 505, the second right-angle side 604 of the push plate 600 always abuts against the slide plate 601, and the first right-angle side 605 pushes the bottom of the box 200 and the tested placement box 300 to be discharged from the discharge port 204;

[0079] Next, the slide plate 601 returns to its original position towards the push port 202. The upper placement box 300 inside the box body 200 falls to the bottom of the box body 200 under the action of gravity. After the first right-angled edge 605 of the push plate 600 contacts the new placement box 300, it is blocked and rotates around the hinge point. The second right-angled edge 604 separates from the slide plate 601. The top of the first right-angled edge 605 drops below the bottom of the new placement box 300. When the slide plate 601 returns to its initial position, the push plate 600 rotates in the opposite direction around the hinge point to reset. The second right-angled edge 604 abuts against the slide plate 601 again.

[0080] 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.

[0081] 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.

[0082] 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 testing device for lithium batteries, characterized in that, The device includes a top plate (100), on which a box body (200) is provided. Several placement boxes (300) are stacked sequentially from top to bottom inside the box body (200). Each placement box (300) contains a battery (302), and a piercing opening (301) is provided through one side of each placement box (300). A push-out port (202) and a discharge port (204) are respectively provided at both ends of the bottom length direction of the box body (200). The height of the discharge port (204) is approximately equal to the height of the placement box (300). An opening (201) is provided through one end of the box body (200) in the width direction. A sliding groove (101) is provided through the top plate (100), located below the box body (200), and the sliding groove (101) extends along the top... The plate (100) is set along its length direction. A slide plate (601) is slidably embedded in the slide groove (101). The slide plate (601) is driven by a first driving device to reciprocate along the length direction of the slide groove (101). A hinge plate (603) is provided on the top of the slide plate (601). A pusher plate (600) is hinged on the hinge plate (603). The top of the pusher plate (600) is higher than the bottom of the placement box (300), and one end of the pusher plate (600) abuts against the top of the slide plate (601). The top plate (100) is also provided with a mounting plate (400). A needle (401) is provided on the mounting plate (400) opposite to the puncture port (301). The mounting plate (400) is driven by a second driving device to move in a direction close to or away from the opening (201). The pusher plate (600) has a right-angled triangular structure, and the right-angle end of the pusher plate (600) is hinged to the hinge plate (603). The pusher plate (600) includes a first right-angled side (605) and a second right-angled side (604) adjacent to the right-angled end. The top of the first right-angled side (605) is higher than the bottom of the placement box (300), and the end of the second right-angled side (604) away from the right-angled end abuts against the top of the slide plate (601). A first support (500) is provided below the top plate (100). The second driving device includes a lead screw (501), which is rotatably connected to the first support (500). A limiting groove (102) is provided through the top plate (100), and a limiting block (402) is provided at the bottom of the mounting plate (400). The limiting block (402) is slidably embedded in the limiting groove (102). The limiting block (402) is threadedly connected to the lead screw (501); the first driving device includes a turntable (503), which is sleeved on the lead screw (501) through a connecting member. One end of the turntable (503) is provided with an eccentric shaft (5031), and a transmission rod (505) is rotatably connected to the eccentric shaft (5031). The end of the transmission rod (505) away from the eccentric shaft (5031) is hinged to the bottom of the slide plate (601); the connecting member is configured such that when the lead screw (501) rotates and drives the mounting plate (400) to move towards the opening (201), the turntable (503) does not rotate through the connecting member; when the lead screw (501) rotates and drives the mounting plate (400) to move away from the opening (201), the turntable (503) rotates one revolution through the connecting member.

2. The testing device for lithium batteries according to claim 1, characterized in that, The connecting component is a one-way bearing (504), and the turntable (503) is sleeved on the lead screw (501) through the one-way bearing (504).

3. The detection device for lithium batteries according to claim 1, characterized in that, The slide (101) has a slot (103) on its side wall. The slot (103) is arranged along the length of the slide (101). The slide plate (601) has a block (602) that is slidably embedded in the slot (103).

4. The testing device for lithium batteries according to claim 1, characterized in that, The mounting plate (400) has a stabilizing post (403) at one end facing the opening (201), and the length of the stabilizing post (403) is greater than the length of the needle (401); The stabilizing column (403) includes a fixed column (4031) and a telescopic column (4032). The fixed column (4031) is fixed on the mounting plate (400). The telescopic column (4032) has a cavity (4033) inside. One end of the fixed column (4031) is slidably inserted into the cavity (4033) of the telescopic column (4032). The telescopic column (4032) is provided with a spring (4034). The end of the spring (4034) away from the telescopic column (4032) is connected to the mounting plate (400).

5. A testing device for lithium batteries according to claim 4, characterized in that, One end of the fixed column (4031) is provided with a piston plate (4035), which is slidably embedded in the cavity (4033). The side wall of the telescopic column (4032) is provided with a nozzle (4036) that communicates with the cavity (4033), and the air outlet of the nozzle (4036) faces the needle (401).

6. A testing device for lithium batteries according to claim 5, characterized in that, There are two stabilizing columns (403), which are symmetrically arranged on both sides of the needle (401).

7. A testing device for lithium batteries according to claim 1, characterized in that, The box body (200) is provided with a reinforcing rib (203) at one end away from the mounting plate (400). One end of the reinforcing rib (203) is connected to the box body (200), and the other end is connected to the top plate (100).

8. A detection method for lithium batteries, implemented using the detection device for lithium batteries as described in claim 1, characterized in that, include: Step S1: Place the batteries to be tested (302) into each placement box (300) independently, and then stack the multi-layer placement boxes (300) vertically inside the box body (200); at this time, the pusher plate (600) is initially located on one side of the pusher port (202) at the bottom of the box body (200), and the placement box (300) at the bottom of the box body (200) is exactly at the testing station; Step S2: Start the second drive device. The second drive device drives the mounting plate (400) to move towards the opening (201) of the box (200). The mounting plate (400) drives the needle (401) to move simultaneously. The needle (401) gradually approaches the test placement box (300) at the bottom of the box (200) and finally inserts into the battery (302) in the box (200) through the puncture port (301) on the side wall of the placement box (300), thus completing the lithium battery (302) puncture detection operation. Step S3: After the puncture test is completed, the second drive device runs in reverse, driving the mounting plate (400) to move away from the opening (201) of the box (200); the mounting plate (400) simultaneously drives the needle (401) to be pulled out from the battery (302), and the needle (401) gradually separates from the placement box (300) and the box (200), returning to the initial position, making room for the subsequent replacement of the placement box (300); As the needle (401) resets, the first drive device is activated, driving the slide plate (601) to move along the groove (101) on the top plate (100) towards the discharge port (204) of the box body (200); the pusher plate (600) on the top of the slide plate (601) moves synchronously with the slide plate (601), and the pusher plate (600) contacts the placement box (300) after detection at the bottom of the box body (200) and pushes it towards the discharge port (204) until the placement box (300) is completely discharged from the discharge port (204); After the placement box (300) is discharged, the first driving device drives the slide plate (601) to initially reset towards the push port (202) of the box body (200); at this time, the placement box (300) that was originally superimposed on the top inside the box body (200) falls vertically under the action of gravity and finally lands at the bottom of the box body (200), filling the empty space after the original test placement box (300) is discharged, forming a new test placement box (300). As the slide plate (601) continues to reset towards the push port (202), the push plate (600) contacts the side of the newly dropped test placement box (300) at the bottom of the box body (200); under the blocking force of the placement box (300), the push plate (600) rotates around the hinge point with the hinge plate (603), and the top height of the push plate (600) gradually decreases to below the bottom of the new placement box (300) to avoid collision or jamming between the push plate (600) and the new placement box (300); When the slide plate (601) returns to its initial position, the push plate (600) is no longer blocked by the new placement box (300); the push plate (600) rotates in the opposite direction around the hinge point under the action of its own structure and gravity, and returns to its initial state. Its top height is once again higher than the bottom of the new placement box (300) at the bottom of the box body (200); at this time, the entire device is reset and waits for the next puncture detection cycle.

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